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  • Table of Content
      28 September 2021, Volume 37 Issue 5 Previous Issue    Next Issue
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    ORIGINAL ARTICLES
    Effects of α1-adrenoreceptor on Treg cell function in collagen-induced arthritis
    WANG Xiao-qin, SHI Hui, FANG Xiao-xia, PENG Yu-ping
    CJAP. 2021, 37 (5): 449-453.   DOI: 10.12047/j.cjap.6127.2021.071
    Abstract   PDF (1396KB) ( 3 )
    Objective: An animal model of collagen-induced arthritis (CIA) was used to investigate the effects of norepinephrine (NE) and α1-adrenoreceptor (α1-AR) on Treg cells in CIA. Methods: Thirty-two male DBA/1 mice were randomly divided into control group and CIA model group. CIA was prepared by intradermal injection of collagen type II (CII, 100 μl) at the tail base of DBA/1 mice. On the 41th day following primary immunization, co-expression of CD4+T and α1-AR in mouse spleens was observed. Protein expressions of α1-AR in the ankle joints and the spleens of mice were measured by Western blot analysis. The CD4+ T cells were isolated from the mouse spleen tissues in CIA mice and treated with NE or α1-AR agonist phenylephrine. Percentage of Treg cells in mouse CD4+ T cells of CIA mice was determined by flow cytometry. Expressions of α1-AR, transforming growth factor-β (TGF-β) and IL-10 in CD4+T cells of CIA mice were assessed by Western blot. Results: Co-expression of CD4 and α1-AR was observed in spleens of both intact and CIA mice. Compared with intace mice, α1-AR expressions in the ankle joints and spleens were down-regulated in CIA mice. NE increased the function of Treg cells in CD4+ T cells of CIA mice compared with that of nothing-treated CD4+T cells of CIA mice. Moreover, the α1-AR agonist phenylephrine increased the Treg cell function in CD4+ T cells of CIA mice relative to that of nothing-treated CD4+T cells of CIA mice. Conclusion: Activating α1-AR on CD4+T cells of CIA mice enhances Treg cell function,facilitating a shift of CD4+T cells toward Treg polarization.
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    Effects of simvastatin on pulmonary fibrosis and endothelial - mesenchymal transition in the pulmonary fibrosis tissue of rats
    TU Rong-fang, HE Zhen-hua, TAN Xiao-wu, CHEN Zhe, ZENG Sai-li, LIU Sha, JIA Yuan-hang, LI Xue-hua
    CJAP. 2021, 37 (5): 454-459.   DOI: 10.12047/j.cjap.6120.2021.068
    Abstract   PDF (1664KB) ( 4 )
    Objective: To investigate the effects of simvastatin (SIM) on pulmonary fibrosis and the expression of VE-cadherin(VE-cad),vimentin(VIM) and alpha-smooth muscle actin(α-SMA)in the pulmonary fibrosis tissue of rats. Methods: Sixty healthy male SD rats were randomly divided into control group(group A), bleomycin group(group B), 5 mg SIM group (group C) and 10 mg SIM group (group D),15 rats in each group. The model of rat pulmonary fibrosis was established by itraperitoneal injection of bleomycin(5 mg/kg). Since the first day of modeling, the rats of group C and D were treated with simvastatin suspension 5 mg/(kg·d) and 10 mg/(kg·d) by intragastric administration everyday, and the rats of group A and B were treated with equal volume of saline 10 ml/(kg·d) everyday. Five rats of each group were sacrificed randomly at the 7th, 14th and 28th day. Masson staining was used to observe the morphological changes of lung tissue in rats. The degree of fibrosis in lung tissues of each group was evaluated by the content of hydroxyproline (HYP) . The microvessel density (MVD) was analyzed by immunohistochemistry,The expressions of protein and mRNA of VE-cad, VIM and α-SMA were determined by immunohistochemistry and RT-PCR. Results: ①Compared with group A, the levels of HYP and MVD, the mRNA and protein expression levels of VIM and α-SMA in lung tissues of groups B, C and D were increased significantly at the 7th, 14th and 28th day(all P<0.05), which reached highest level at the 28th day. However, the mRNA and protein expression levels of VE-CAD were decreased significantly at the corresponding time (P<0.05), which reached lowest level at 28th day. ②Compared with group B, the levels of HYP and MVD, the mRNA and protein expression levels of VIM and α-SMA in groups C and D were decreased at the 7th, 14th and 28th day (all P<0.05), which were decreased more obviously in group D at the 28th day. However, the mRNA and protein expression levels of VE-CAD were increased at the corresponding time (all P<0.05), which were increased more obviously in group D at the 28th day. Conclusion: Simvastatin can reduce the degree of pulmonary fibrosis in rats through inhibiting the process of EnMT, which can enhance the expression of VE-cad and reduce the expression of VIM and α-SMA.
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    BRIEF REPORTS
    Experience of recording NMDA current in brain slices by whole-cell patch clamp technique
    HUANG Yan-yun, GAO Jie, ZHANG Li-na, DU Xiang-xin, ZHANG Yu-tong, GUO Xia, HAO Na, LI Jian-guo, ZHANG Yu
    CJAP. 2021, 37 (5): 459-462.   DOI: 10.12047/j.cjap.6053.2021.057
    Abstract   PDF (1308KB) ( 2 )
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    ORIGINAL ARTICLES
    Effects of BiejiaYugan Granule on TGF-β1/Smads pathway in rats with hepatic fibrosis caused by compound factors
    DING Mao-peng, WEI Ling-xia, WANG Zhi-wang, CHENG Xiao-li, PANG Ya-rong
    CJAP. 2021, 37 (5): 463-467.   DOI: 10.12047/j.cjap.6098.2021.045
    Abstract   PDF (1214KB) ( 0 )
    Objective: To investigate the therapeutic effects of Biejia Yugan Granule on hepatic fibrosis caused by compound factors in rats and its effect on TGF-β1/Smads signaling pathway. Methods: SD rats were randomly divided into blank control group, model control group, colchicine group, Biejia Yugan Granule low, medium and high dose (1.85, 3.70, 7.40 g/kg) groups (n= 8 in each group). The rat model of hepatic fibrosis was established by treating with 5% alcohol 15 ml/kg (ig) everyday and injecting with 40% carbon tetrachloride (sc) twice a week for 42 days. The effects of Biejia Yugan Granule on liver function, liver index and water content, serum hepatic fibrosis related indicators, key proteins and gene expression of TGF-β1/Smads signaling pathway in rats were observed. Results: Biejia Yugan Granule at the doses of 1.85, 3.70 and 7.40 g/kg could decrease the serum levels of ALT, AST, ALP and HA, PCⅢ, C-Ⅳ, LN significantly, reduce the water content of liver tissue leads to the decrease of liver index, regulate the liver tissue TGF-β1, Smad3 mRNA and Smad7 mRNA expressions. Conclusion: Biejia Yugan Granule has obvious effects of reducing enzyme and protecting liver and inhibiting hepatic fibrosis, and inhibiting TGF-β1/Smads signaling pathway is one of its mechanisms of anti-hepatic fibrosis.
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    BRIEF REPORTS
    Efficacy of IL-21 monoclonal antibody on MRL/lprlupus mice
    CHEN Xu-e, MA Ting, SHENG Liang, WANG Wen-wen, LI Ji
    CJAP. 2021, 37 (5): 467-470.   DOI: 10.12047/j.cjap.6131.2021.092
    Abstract   PDF (1082KB) ( 2 )
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    Effects of training methods on conversion of rat skeletal muscle fiber types and CaMK II/MEF2 signaling pathway
    WU Jing-wei, WANG Yi-rong, CHEN Wei, LIU Wen-feng
    CJAP. 2021, 37 (5): 470-474.   DOI: 10.12047/j.cjap.6136.2021.075
    Abstract   PDF (1387KB) ( 2 )
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    ORIGINAL ARTICLES
    Effects of ketoconazole on physiological function of liver and testis in mice
    HE Ying-hao, FANG Qing, YANG Ling-ling, CHEN Si-min, LUO Yan-ping, QIAN Hong, QI Min-you
    CJAP. 2021, 37 (5): 475-479.   DOI: 10.12047/j.cjap.6110.2021.063
    Abstract   PDF (1188KB) ( 0 )
    Objective: To investigate the effects of different doses of ketoconazole (KCZ) on the physiological functions of the liver and testis in Kunming mice. Methods: Forty male Kunming mice were randomly divided into four groups (n=10): normal group, KCZ low-dose group (30 mg/kg), medium-dose group (50 mg/kg), and high-dose group (70 mg/kg). The mice in the drug groups were injected subcutaneously (0.1 ml/10 g) with the corresponding dose of KCZ once a day, and the concentrations of KCZ in the KCZ low, middle, and high dose groups were 3 mg/ml, 5 mg/ml and 7 mg/ml respectively, and the normal group was injected with the same amount of normal saline for 3 weeks. The activities of aspartate transaminase (AST) and alanine aminotransferase (ALT) in serum, and γ-glutamyl transpeptidase (γ-GT), lactate dehydrogenase (LDH) and acid phosphatase (ACP) in testicular tissue were measured. HE staining was used to observe the pathological changes of the liver and testis. Results: Compared with the normal group, the activities of AST and ALT were increased significantly (P<0.01), and the activities of γ-GT, ACP and LDH were decreased markedly in KCZ groups (P<0.01). KCZ could affect the above indexes in a dose-dependent manner. HE staining showed that the hepatocytes were denatured, arranged loosely, and the cytoplasm was light in color. The lumen of the seminiferous tubules of the testis were enlarged, and the number of spermatogenic cells and sperm at all levels were decreased. Conclusion: KCZ could cause physiological function damage and pathological histological changes of the liver and testis, increase the levels of liver transaminase, reduce the activities of testicular specific enzymes of mice. Besides, the degree of damage was increased with the increase of dose.
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    BRIEF REPORTS
    Dynamic changes of cardiac structure and function in mice with abdominal aortic constriction
    ZANG Mao-lin, YU Meng-di, CHEN Zhong-hua, HUANG Meng-qi, LUO Peng, FAN Hong-kun, YANG Chun
    CJAP. 2021, 37 (5): 479-482.   DOI: 10.12047/j.cjap.6113.2021.065
    Abstract   PDF (1354KB) ( 0 )
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    The regulation of 100% Lycium Barbarum juice supplement in HPA axis and serum glucose balance during increasing resistance training
    WENG Xi-quan, LIN Bao-xuan, WANG Chao-ge, ZHANG Xiao-li, XU Guo-qin, PENG Yan-qun
    CJAP. 2021, 37 (5): 482-485.   DOI: 10.12047/j.cjap.6118.2021.067
    Abstract   PDF (1117KB) ( 1 )
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    ORIGINAL ARTICLES
    Effect of nuclear radiation on rat model of decompression sickness induced by large depth rapid floating escape
    XU Ji, FANG Yi-qun, BAO Xiao-chen, YUAN Heng-rong, WANG Nan, WANG Fang-fang
    CJAP. 2021, 37 (5): 486-489.   DOI: 10.12047/j.cjap.6086.2021.059
    Abstract   PDF (1260KB) ( 0 )
    Objective: To investigate the effects of different doses of nuclei exposure at different time on morbidity, mortality, and damage indicators in a rat model of decompression sickness caused by rapid flotation escape at a large depth. Methods: Eighty male SD rats were randomly divided into blank control group, escape control group and six intervention groups (escape at 4 hours after 4 Gy radiation, escape at 4 hours after 6 Gy radiation, escape at 4 hours after 12 Gy radiation, escape at 8 hours after 4 Gy radiation, escape at 8 hours after 6 Gy radiation, escape at 8 hours after 12 Gy radiation). Rats in intervention groups were exposed to different doses of γ-ray (4,6,12 Gy, respectively), and then were carried out a large depth and rapid buoyancy escape experiment (maximum pressure depth of 150 m). The changes of lung W/D, spleen index and plasma IL-1β levels were analyzed. Results: Compared with the blank control group, decompression sickness incidence and mortality of rats in escape groups after nuclear exposure were increased significantly. In 4 Gy and 6 Gy irradiation groups, higher morbidity and mortality were observed in rats which escaped at 4 h post nuclear exposure when compared with rats in 8 h groups. Consistent with the changes in morbidity and mortality, the wet / dry ratio of lung tissue, the pathological damage of lung tissue, and the decrease of spleen index showed the same trends: the changes were obvious at 4 h after lower doses nuclear radiation (4 Gy and 6 Gy), not at 8 h. However, these indicators all changed markedly at 4 and 8 h after higher doses nuclear radiation (12 Gy). Plasma IL-1β levels were significantly increased in each post-radiation exposure group when compared with the blank control group and the exposed control group. Conclusion: Nuclear radiation-induced lung injury, the damaged immune function and elevated plasma inflammatory factor concentrations increase the risk of decompression sickness after rapid ascent.
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    Effects of RPA1 down-regulation on the invasion and migration and cell cycle of human nasopharyngeal carcinoma CNE-2R cells with radio resistance
    ZHANG Zi-xin, LU Hai-yang, YANG Zhi-hua, LIU Chang-hu, ZHAN Wen-hua, ZHE Hong, ZHAO Ren
    CJAP. 2021, 37 (5): 490-494.   DOI: 10.12047/j.cjap.6092.2021.042
    Abstract   PDF (1518KB) ( 0 )
    Objective: To investigate the effects of RPA1 silencing on the invasion, migration and cell cycle of human nasopharyngeal carcinoma CNE-2R cells. Methods: shRNA technology was used to construct CNE-2R cell lines with RPA1 low-expression, which were verified by RT-PCR and Western blotting. The following assays were performed using the three 3 groups: control group(CNE-2),negative control group(NC-shRNA) and RPA1 down-regulation group(RPA1-shRNA). The effects of RPA silence on the proliferation, invasion, migration, and cell cycle of CNE-2R cells were detected using Cell Counting Kit-8, clone formation experiment, Transwell, scratch test and flow cytometry, respectively. The expressions of Chk2, p-Chk2, Cdc 25c and p-cdc25c were tested by Western blot assay. Results: The expressions of RPA1 mRNA and protein in the RPA1-shRNA group were lower than those in the CNE-2 and NC-shRNA groups significantly (P<0.01 and 0.05). Compared with CNE-2 and NC-shRNA groups, the abilities of proliferation, invasion and migration of RPA1-shRNA group were decreased and the cell cycle in the RPA1-shRNA group was blocked in the G2/M phase (P<0.01). The expressions of Chk2 and Cdc25c in RPA1-shRNA group cells were lower than those in CNE-2R and NC-shRNA group cells (P<0.05), while the expressions of p-Chk2 and p-cdc25c were higher than those in the other groups (P<0.05). Conclusion: After RPA1 silenced, the proliferation and migration of radio resistant human nasopharyngeal carcinoma CNE-2R cells was inhibited, resulting in cell cycle arrested in the G2/M phase.
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    Effects of Betulinic acid on apoptosis in human gastric cancer SGC-7901 cells
    DING Lu, SHAO Shu-li, HE Meng-qi, HUANG Xin , ZHANG Wei-wei, ZHANG Zhen-zhu
    CJAP. 2021, 37 (5): 495-499.   DOI: 10.12047/j.cjap.6091.2021.060
    Abstract   PDF (1436KB) ( 0 )
    Objective: To investigate the effects of betulinic acid on apoptosis of human gastric cancer SGC-7901 cells. Methods: The human gastric cancer SGC-7901cells were divided in to 4 groups, and each group was set with 3 replicates. The SGC-7901cells in control group were not treated with betulinic acid; the other 3 experimental groups were treated with betulinic acid at the concentrations of 10, 20 and 30 mg/L, respectively; each group was incubated in a 5% carbon dioxide incubator for 48 h. Laser confocal microscope was used to observe morphological changes of SGC-7901 cells; Flow cytometry was applied to determine apoptosis rate and mitochondrial membrane potential. The mRNA and protein levels of Bcl-2, Bax and Caspase-3 were also detected by qRT-PCR and western blot respectively. Results: Compared with the control group, SGC-7901 cells in the treated group at final concentrations of 10, 20 and 30 mg/L shrinked, appeared apoptosis body along with nuclear splitting. The percentage of cells in early and advanced period of apoptosis were markedly increased (P<0.05 or P<0.01), mitochondrial membrane potential was obviously reduced (P<0.05 or P<0.01). qRT-PCR and western blot analysis showed that the mRNA and protein expressions of Bax and Caspase-3 were increased significantly (P<0.01), while the expressions of Bcl-2 were decreased significantly (P<0.01). Conclusion: Within a certain range of concentrations, betulinic acid induces cell apoptosis by regulating the expression of Bcl-2, Bax and Caspase-3 in human gastric cancer.
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    Effects of miR-670-5p on proliferation, migration and invasion of lung cancer cells
    LI Hong-xia, LIU Fang, XIA Jun-hua
    CJAP. 2021, 37 (5): 500-505.   DOI: 10.12047/j.cjap.6102.2021.046
    Abstract   PDF (1746KB) ( 1 )
    Objective: To investigate the effects of miR-670-5p on the proliferation, migration and invasion of lung cancer cells, further to analyze its mechanisms of regulating WW domain oxidoreductase gene (WWOX). Methods: From January 2016 to October 2017, 28 cases of lung cancer tissues and corresponding adjacent tissues were collected. And the expressions of miR-670-5p in lung cancer tissues and adjacent tissues were detected by RT-qPCR. Lung cancer cells A549 were divided into anti-miR-NC group (transfected with anti-miR-NC), anti-miR-670-5p group (transfected with anti-miR-670-5p), and anti-miR-670-5p+ si-NC group (transfected with anti-miR-670-5p and si-NC), anti-miR-670-5p+si-WWOX group (transfected with anti-miR-670-5p and si-WWOX). After 48 hours of transfection, RT-qPCR or Western Blot were used to detect the transfection effects. Cell viability was detected by using CCK-8 method; cell migration and invasion were detected by using Transwell assay; Western blot was used to analyze the expression levels of P21, E-cadherin and MMP-2 protein. The dual luciferase reporter gene assay and Western blot were applied to verify the targeting relationship between miR-670-5p and WWOX. Results: The expression level of miR-670-5p in lung cancer tissues was significantly higher than that in adjacent tissues (P<0.05). Inhibition of miR-670-5p decreased MMP-2 protein expression (P<0.05), increased P21 and E-cadherin expressions (P<0.05), and inhibited proliferation, migration and invasion of A549 cells (P<0.05). WWOX was a target gene of miR-670-5p, and miR-670-5p negatively regulated WWOX expression. Inhibition of WWOX partially reversed the effect of anti-miR-670-5p on proliferation, migration and invasion of A549 cells (P<0.05). Conclusion: miR-670-5p promotes proliferation, migration and invasion of lung cancer cells by targeting WWOX.
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    Effects of Magnolol combined with Gefitinib on A549 non-small cell lung cancer cells
    REN Ji-lian, CUI Ling-zhi, HAO Xiao-xia, LI Xiao-yan, CHANG Yan-xiang
    CJAP. 2021, 37 (5): 506-510.   DOI: 10.12047/j.cjap.6138.2021.076
    Abstract   PDF (1738KB) ( 0 )
    Objective: To investigate the synergistic effects of magnolol and gefitinib on non-small cell lung cancer A549 cells. Methods: A549 cells were treated with Magnolol (6.25~500 μmol/L) or gefitinib (6.25~500 μmol/L) for 24 h, respectively, and the cell viability was detected by cell counting Kit-8 (CCK-8) experiment (n=3). Magnolol 100 μmol/L and gefitinib 5 μmol/L were selected in the following experiments (n=3, 24 h). Control group, magnolol group, gefitinib group and magnolol+gefitinib group were set up for factorial analysis. Colony formation experiment was applied to detect the cell proliferation. Western blot was used to detect protein expressions. Flow cytometry was applied to test cell apoptosis and sorting CD44+ and CD133+ cells. Results: Compared with the control group, the colony formation rate of Magnolol or Gefitinib groups was decreased significantly (P<0.05); the apoptosis rate was increased significantly (P<0.05); the number of CD44+ and CD133+ cells was reduced significantly (P<0.05); the expressions of Ki67, PCNA, and stem cell marker proteins SOX2 and OCT4 were down-regulated (P<0.05); and the ratio of Bax/Bcl-2 was increased significantly (P<0.05). Compared with the Magnolol group or Gefitinib group, the Magnolol+Gefitinib group further promoted the above changes (P<0.05), and the apoptosis rate, the ratio of Bax/Bcl-2, SOX2 and OCT4 all showed interactions between magnolol and gefitinib (P<0.05). Conclusion: Magnolol and gefitinib promote the apoptosis of A549 cells and inhibit its stem cell-like properties, and the effect of the two combined is better than separated administration. Magnolol and gefitinib have interactive effects on A549 cells.
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    BRIEF REPORTS
    The compatibility of coix leaves and epimedium against fatigue and hypoxia tolerance
    ZHAO Shi-bo, HUANG Suo-yi, PAN Zhi, PENG Xiao-min, PENG Xiao-jing, WU Shi-juan, WEI De-zhi, CHEN Xin-peng
    CJAP. 2021, 37 (5): 510-513.   DOI: 10.12047/j.cjap.6059.2021.083
    Abstract   PDF (1019KB) ( 1 )
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    ORIGINAL ARTICLES
    Anti-gastric cancer effects of Z Ajoene and its molecular mechanisms
    ZHU Ming-liao, ZHENG Zhen, LOU En-zhe, ZHAO Kai-ting, HE Shi-yan, CHEN Jia-yu
    CJAP. 2021, 37 (5): 514-519.   DOI: 10.12047/j.cjap.6122.2021.069
    Abstract   PDF (1787KB) ( 0 )
    Objective: To investigate the effects of Z Ajoene on gastric cancer cell MGC-803 and its molecular mechanisms. Methods: The gastric cancer cells MGC-803 were treated with 0, 1, 5, 25 and 125 μmol/L Z Ajoene for 24 h, 48 h and 72 h, each with 3 replicate wells. The proliferation activity of MGC-803 cells was analyzed by MTS method, mitochondrial membrane potential was analyzed after JC-1 staining, nuclear type was observed after Hoechst 33342 staining, cytotoxicity was detected by LDH release method, and the apoptosis level and cell cycle were analyzed with flow cytometry. RT-qPCR and Western blot methods were used to evaluate the expression levels of P53, Caspase-3, RAS, ERK, BCL-2, AKT, mTOR and PI3K genes. At the same time, 4-week-old male BALB/C mice were randomly divided into 5 groups, 20 per group, and were subcutaneously inoculated with gastric cancer cell MGC-803 in the groin. Two days later, each group was injected with Z Ajoene at the doses of 0, 1, 5, 25 and 125 μmol/L, 0.1 ml/time, and was injected every other day. On the 20th day of the first injection of tumor cells, 10 mice in each group were killed, the tumor tissues were taken out and weighed. The survival period of the remaining mice was recorded and the effects of Z Ajoene on the growth and survival period of gastric cancer in tumor-bearing mice were observed. Results: After Z Ajoene treatment, the proliferation activity of MGC-803 cells was significantly inhibited and the apoptosis rate was significantly increased(P<0.01). The transcription and expression levels of p53, Caspase-3 and BAX genes were significantly increased, while the transcription and expression levels of RAS, ERK1, BCL-2, AKT, mTOR and PI3K genes were decreased markedly(P<0.01). The tumor inhibition experiments showed that the growth of the tumor could be inhibited and the survival time of the tumor-bearing animals could be greatly prolonged after Z Ajoene treatment(P<0.01). Conclusion: Z Ajoene has therapeutic effects on gastric cancer, can inhibit the proliferation of gastric cancer cells and induce them apoptosis by regulating the expression of PI3K-AKT-mTOR and RAS-RAF-MEK-ERK signal pathways.
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    BRIEF REPORTS
    Research on the influence of 12-week basic load resistance training on the physical fitness of flight students in an aviation school
    JI Zhe, ZHOU Hai-tao, ZOU Zhi-kang, GUO Xian, ZHANG Xin, CAO Hui, JIANG Zhi-dong, REN Xiang, WANG An-li, CAO Jian-min
    CJAP. 2021, 37 (5): 519-522.   DOI: 10.12047/j.cjap.6165.2021.054
    Abstract   PDF (1068KB) ( 1 )
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    ORIGINAL ARTICLES
    Effects of Tangeretin on cortisol stress response induced by high-intensity resistance exercise
    LIU Meng, MO Shi-wei , ZHOU Zhi-qin , GAO Bing-hong
    CJAP. 2021, 37 (5): 523-528.   DOI: 10.12047/j.cjap.6166.2021.055
    Abstract   PDF (1116KB) ( 1 )
    Objective: To investigate the effects of 4-week tangeretin supplementation on cortisol stress response induced by high-intensity resistance exercise. Methods: Twenty-four sprinters were paired and randomly divided into experimental group (EG) and control group (CG). EG orally took supplement with tangeretin (200 mg/day) and CG took placebo for 4 weeks. Before and after the 4-week intervention, all sprinters performed a set of high-intensity resistance exercise (shoulder press, squat, bench press and deadlift, 10 RM, 4 sets per movement) to stimulate their cortisol stress responses. Serum levels of cortisol, adreno-corticotropic hormone (ACTH), superoxide dismutase (SOD), white blood cell count (WBC) and blood glucose were obtained by collecting blood sample before the exercise (PRE), immediately after the exercise (P0), and at 10 (P10), 20 (P20), and 30 minutes (P30) after the exercise. Results: Compared with the same period before the intervention, after the 4-week tangeretin intervention, EXP showed significantly reduced serum cortisol level at PRE (P=0.017), P10 (P=0.010), P20 and P30 (P<0.05 or P<0.01), and significantly reduced WBC at PRE, ACTH at P10 (P=0.037) and WBC and ACTH at P30 (P<0.05). Compared with CTROL, EXP showed significantly lower levels of the serum cortisol at PRE and P10 (P<0.05), and significantly lower levels of the ACTH (P<0.05) and WBC (P<0.01) at P30, and significantly increased level of the SOD activity at P30 (P<0.05). Conclusion: Tangeretin supplementation can significantly alleviate the cortisol stress response induced by high-intensity resistance exercise, inhibit the excessive secretion of cortisol, enhance antioxidant capacity, accelerate the elimination of inflammation in the body, and promote the recovery of body functions.
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    Effects of altitude on circulating endothelial progenitor cells and hypoxia-inducible factor-1α in patients with type 2 diabetes
    LU Run-lan, LI Ping, LI Bing, XING Yuan, ZHANG Yuan-yuan, CHEN Bin-ze, HU Qin-ni, YANG Zhi-hua, GAO Bao-dong, HA Xiao-qin, GAO Cai-yan
    CJAP. 2021, 37 (5): 529-533.   DOI: 10.12047/j.cjap.6133.2021.074
    Abstract   PDF (1113KB) ( 0 )
    Objective: To compare the changes in the number of circulating endothelial progenitor cells and hypoxia-inducible factors in patients with type 2 diabetes at different altitudes, and to provide a basis for the research and treatment of type 2 diabetes vascular complications. Methods: Selected Type 2 diabetes patients who were diagnosed in a low altitude area of 386 m (Xianyang City) and a high altitude area of 1 520 m (Lanzhou) (25 persons/29 persons) and healthy persons (20 persons/20 persons) were selected. An automatic biochemical analyzer was used to detect the indexes of blood lipids, blood glucose, and glycosylated hemoglobin of the two groups of people, and the concentration of Hypoxia inducible factor-1α (HIF-1α) was detected by enzyme-linked immunosorbent assay (ELISA). The number of circulating endothelial progenitor cells (EPCs) in peripheral blood was determined by a cytometer. Results: No matter in low or high altitude areas, the number of circulating EPCs in the diabetes group was lower than that in the healthy group (P<0.01). The levels of body mass index (BMI), waist to hip ratio (WHR), triglyceride (TG), fasting blood glucose (FBG) and glycosylated hemoglobin (HbAlc) were increased (P<0.05). Compared with the low-altitude group, the expression levels of HIF-1α in diabetic patients at high-altitude and healthy people were increased significantly (P<0.05), while the number of circulating EPCs was decreased significantly (P<0.05), and the number of circulating EPCs in healthy people or the patients with type 2 diabetes without vascular complications was higher than that of patients with type 2 diabetes with vascular complications (P<0.05). Conclusion: With the increase in altitude, the expression level of HIF-1α in type 2 diabetes mellitus(T2DM)patients is increased, and the number of circulating EPCs is decreased, which is closely related to the degree of vascular disease. Therefore, it is possible through transplantation of EPCs for high altitude T2DM patients to achieve the prevention and improvement of diabetic vascular complications.
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    Effects of Sitagliptin on myocardial remodeling and autophagy in diabetic mice and its mechanism
    CHEN Yi-fan, ZHANG Li-jun, LIU Qing-hua, LI Xue-wen
    CJAP. 2021, 37 (5): 534-537.   DOI: 10.12047/j.cjap.6129.2021.073
    Abstract   PDF (1340KB) ( 1 )
    Objective: To investigate the effects of Sitagliptin on myocardial remodeling and autophagy in diabetic mice and its possible mechanisms. Methods: C57 mice aged ten weeks were treated with streptozocin (STZ) at the dose of 50 mg/(kg·d) by intraperitoneal injections for five consecutive days, and the level of fasting blood glucose concentration was higher than 16.7 mmol/l after seven days indicated that the diabetic model was established successfully. Mice were divided into four groups, including control group (n=10) which was intraperitoneally injected with the same volum of saline, the model group (n=8), Sitagliptin treatment group(diabetic mice were treated with Sitagliptin at the dose of 10 mg/(kg·d)by gavage, n=8) and the inhibitor group(diabetic mice were treated with Compound C, an AMPK inhibitor, at the dose of 10 mg/(kg·d) by intraperitoneal injection, n=8). After six weeks, all the mices were weighted and then put to death and the hearts were separated to caculate ventricular /body weight ratio. Hemaloxylin-Eosin (HE) staining was used to observe the cell morphology and masson staining was used to observe interstitial fibrosis. Western blot was used to test the heart protein expressions of Connexin43(Cx43), adenosine 5'-monophosphate -activated protein kinase (AMPK), brain natriuretic peptide(BNP), transforming growth factor(TGF-β) and LC3B. Results: After six weeks of treatment, compared with control group, the ventricular /body weight ratio was improved (P<0.05), The cardiomyocyte hypertrophy and increased fibrosis were observed in the model group. The expression levels of BNP and TGF-β were increased, while the expression levels of Cx43,LC3B and AMPK were decreased significantly(P<0.05). However, compared with model group, treatment with Sitagliptin decreased BNP, TGF-β protein levels and increased Cx43 and LC3B protein levels, while Compound C could inhibit the upregulation of Cx43, LC3B and AMPK protein (P<0.05). Conclusion: Sitagliptin could improve cardiac hypertrophy and decrease interstitial fibrosis and AMPK-related signaling pathways was involved in the regulation of Cx43 and autophagy.
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    Calcium-sensing receptor promotes endotoxin-induced myocardial injury through the JNK pathway
    SONG Jia-yu, GUO Jing, JIANG Chun-ming
    CJAP. 2021, 37 (5): 538-542.   DOI: 10.12047/j.cjap.6171.2021.081
    Abstract   PDF (1302KB) ( 0 )
    Objective: To investigate the effects of calcium-sensing receptor (CaSR) on the c-Jun N-terminal kinase (JNK) in myocardial injury induced by endotoxin. Methods: The endotoxic model of neonatal rats was made by intraperitoneal injection of LPS(5 mg/kg). Neonatal Wistar rats were randomly divided into 6 groups: ①control group (saline group), ②endotoxin (LPS) group, ③LPS + CaSR agonist group, ④LPS + CaSR inhibitor group, ⑤LPS + JNK inhibitor group, ⑥LPS + CaSR inhibitor + JNK inhibitor group. The morphology of myocardium was observed by HE staining. The content of lactate dehydrogenase(LDH) in serum was determined. And the expression of IL-6 mRNA was detected by PCR. The protein expressions of CaSR and JNK were analyzed by Western blot. Results: Compared with the control group, the myocardial injury was aggravated in the LPS group. The content of LDH and the expressions of IL-6 mRNA, CaSR and JNK were increased significantly (P<0.05). Compared with the LPS group,myocardial injury was aggravated in the CaSR agonist group. The content of LDH and the expressions of IL-6 mRNA,CaSR and JNK were increased (P<0.05). In the CaSR inhibitor group,myocardial injury was reduced. The content of LDH and the expressions of CaSR and JNK were decreased (P<0.05). In the JNK inhibitor group,myocardial injury was further alleviated. The content of LDH and the expressions of IL-6 mRNA, CaSR and JNK were decreased (P<0.05). Myocardial injury was significantly reduced in the CaSR inhibitor + JNK inhibitor group. The content of LDH and the expressions of IL-6 mRNA, CaSR and JNK were further reduced (P<0.05). Conclusion: CaSR is involved in myocardial injury induced by LPS in neonatal rats perhaps through the JNK pathway.
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    Therapeutic effects of moxibustion on neonatal mice with hypoxia-ischemia brain injury
    OU-YANG Xin, LI Qing, XIAO Ai-jiao, CHEN Ming-ren
    CJAP. 2021, 37 (5): 543-547.   DOI: 10.12047/j.cjap.6095.2021.061
    Abstract   PDF (1200KB) ( 0 )
    Objective: To investigate the effects of moxibustion on the behavioral performance, brain morphological structure of mice with hypoxia-ischemia brain injury and to explore its mechanisms. Methods: One hundred and six ICR mice were randomly divided into three groups, sham group (n=23), model group (n=46) and moxibustion-treated group (n=37). Neonatal hypoxic-ischemia brain injury was induced by ligation of common carotid artery followed by hypoxia (8% oxygen, 100 min), and pups in the moxibustion-treated group were administered suspended moxibustion on the Dazhui points (GV14) at a height of approximately 2 cm over a hairless area of the skin once a day for 4 days (i.e. at 2, 24, 48 and 72 hours after hypoxia-ischemia procedure). Behavioral tests were used to evaluate behavioral performance. HE staining was used to observe brain morphological structure. Western blot was used to detect the expression of SOD2 protein, and spectrophotometry was used to determine the content of MDA in the ipsilateral brain. Results: Mouse pups in sham group showed that the behavioral performance was normal, the brain tissue cells were densely and neatly arranged, the expression of SOD2 and the level of MDA in the brain tissues were normal. Compared with sham group, mouse pups in the HI model group exhibited a significant longer latency to complete the righting reflex, geotaxis reflex, cliff avoidance (P<0.05) and a marked shorter latency to complete the grip test (P<0.05); and the HI model group had dramatic brain morphological changes showing missing regions, decreased expression of SOD2 protein (P<0.05) and increased level of MDA in the brain. Compared with HI model group, mouse pups in the moxibustion-treated group exhibited a significant shorter latency to complete the righting reflex, geotaxis reflex, cliff avoidance test (P<0.05) and a marked longer latency to complete the grip test (P<0.05); and the moxibustion-treated group had less brain morphological changes, increased expression of SOD2 protein (P<0.05) and decreased level of MDA in the brain (P<0.05) . Conclusion: Moxibustion could improve behavioral performance and attenuate hypoxia-ischemia brain injury, which might be related to increasing the expression of SOD2 protein and decreasing the content of MDA, thus enhancing the anti-oxidative ability.
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    Effects of dezocine on cardiac myocytes injury induced by hypoxia and reoxygenation in rats and its mechanism
    WANG Chun-kui, LIU Xi-ming, TAO Hong, DUAN Ye, LIU Wei
    CJAP. 2021, 37 (5): 548-554.   DOI: 10.12047/j.cjap.6115.2021.066
    Abstract   PDF (1530KB) ( 0 )
    Objective: To investigate the mechanisms of dezocine on regulating H9C2 oxidative stress and apoptosis of rat cardiac myocytes induced by hypoxia-reoxygenation(H/R) by regulating the expressions of microRNA-7a- 5p(miR-7a-5p)/ubiquitin E3 ligase tripartite motif 10(TRIM10). Methods: H9C2 cells were divided into control group (cultured normally), H/R group (treated with hypoxia for 3 h and then reoxygenation for 4 h), different doses of dezocine intervention group (H9c2 cells were pretreated with dezocine at the concentrations of 10-7, 10-6 and 10-5 mmol/L for 24 h, and then treated with H/R), H/R+miR-7a-5p group (H9C2 cells were transfected with miR-7a-5p mimics and then treated with H/R), H/R+miR-NC group (H9C2 cells were transfected with miR-NC and then treated with H/R), H/R+Dezocine+anti-miR-7a-5p group (H9c2 cells transfected with anti-miR-7a-5p were pretreated with 10-5 mmol/L dezocine for 24 h, and then treated with H/R), H/R+dezocine+ anti-miR-NC Group (H9c2 cells transfected with anti-miR-NC were pretreated with 10-5 mmol/L dezocine for 24 h, and then treated with H/R). Each group of cells was set with 3 replicate wells, and the experiment was repeated 3 times. The content of malondialdehyde(MDA) and activity of superoxide dismutase(SOD) and glutathione peroxidas(GSH-Px) were detected by the enzyme-linked immunosorbent assay. The cells apoptosis was detected by flow cytometry. The protein expressions of B-cell lymphoma-2(Bcl-2), Bcl-2-associated X protein(Bax) and TRIM10 were detected by Western blot, and the expressions of miR-7a-5p and TRIM10 mRNA were detected by real-time quantitative PCR(RT-qPCR). The double luciferase reporter gene experiment was used to verify the regulatory relationship between miR-7a-5p and TRIM10. Results: Compared with the control group, the MDA content, apoptosis rate, the expression of Bax protein, and the expression of TRIM10 mRNA and protein in the H/R group were all increased (P<0.05), while the activities of SOD and GSH-Px, and the expressions of Bcl-2 protein and miR-7a-5p were all decreased (P<0.05). Compared with the H/R group, the MDA content, apoptosis rate, the expression of Bax protein, and the expression of TRIM10 mRNA and protein in the different doses of dezocine intervention group were decreased (P<0.05), while the activities of SOD and GSH-Px, and the expressions of Bcl-2 protein and miR-7a-5p were all increased (P<0.05), and there were significant differences in each index between the different doses of dezocine intervention groups (P< 0.05). Compared with the H/R+miR-NC group, the MDA content, apoptosis rate, the protein expressions of Bax and TRIM10 in the H/R+miR-7a-5p group were decreased (P<0.05), while the activities of SOD and GSH-Px, and the expression of Bcl-2 protein were all increased (P<0.05). Compared with the H/R+dezocine+anti- miR-NC group, the MDA content, apoptosis rate, the protein expressions of Bax and TRIM10 in the H/R+dezocine+anti-miR-7a-5p group were all increased (P<0.05), while the activities of SOD and GSH-Px, and the expression of Bcl-2 protein were all decreased (P<0.05). Conclusion: Dezocine can reduce oxidative stress and apoptosis of rat cardiomyocytes H9C2 induced by H/R, which may play a role in regulating the miR-7a-5p / TRIM10 axis.
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    BRIEF REPORTS
    Time course changes of saliva α-amylase salivary activity and urine glucocorticoid concentration during a ultramarathon
    XU Sheng-jia, DENG Guo-zhe, ZHANG Xinpeng, LI Chen, XIE Li, MA Ji-zheng, KANG Xue-jun
    CJAP. 2021, 37 (5): 554-556.   DOI: 10.12047/j.cjap.6072.2021.036
    Abstract   PDF (1059KB) ( 1 )
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    ORIGINAL ARTICLES
    Effects of Butylphthalide on airway mucus hypersecretion, IL-13 and TNF-α in asthmatic mice
    PANG Ya-rong, DU Yue,WANG Zhi-wang, XI Jian-hong, LI Ji-yang, WEI Ling-xia, DING Mao-peng, CHENG Xiao-li
    CJAP. 2021, 37 (5): 557-560.   DOI: 10.12047/j.cjap.6125.2021.049
    Abstract   PDF (1455KB) ( 0 )
    Objective: To investigate the effects of Butylphthalide (NBP) on airway mucus hypersecretion, interleukin-13 (IL-13) and tumor necrosis factor-α (TNF-α) in asthmatic mice. Methods: The mice were randomly divided into control group, asthma group, DEX group and high, medium and low doses of NBP (100, 50, 25 mg/kg) groups (n=12). Ovalbumin (OVA) injection was sensitized on the 1st, 8th, and 15th day of the experiment, and OVA was inhaled on the 22nd day to stimulate for 5 weeks to replicate the asthma model, and 20 mg/kg of NBP was given for intervention before the challenge. Finally, the asthma behavior, the secretion of goblet cells and Mucin 5ac (Muc5ac)were observed, and meanwhile the viscosity of bronchoalveolar lavage fluid (BALF) and the levels of Muc5ac, IL-13 and TNF-α in BALF were measured by ELISA. Results: Compared with the control group, the degree of sneezing, nose scratching and asthma, the proliferation of airway epithelial goblet cells and secretion of Muc5ac in the asthma group were increased significantly (P<0.01), meanwhile, the viscosity of BALF and the contents of Muc5ac, IL-13 and TNF-α were also increased significantly (P<0.01). Compared with the asthma group, the above behavioral scores of asthma were decreased significantly (P<0.01) after the intervention of 25, 50 and 100 mg/kg NBP, as well as the proliferation of airway epithelial goblet cells, secretion of Muc5ac, the viscosity of BALF and the contents of Muc5ac, IL-13 and TNF-α were significantly lower than those of the asthma group (P<0.05, 0.01). Conclusion: NBP has the effect of anti-asthma by inhibiting mucus hypersecretion, and one of its mechanisms is to alleviate the abnormal expressions of IL-13 and TNF-α.
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    Effects of inhibiting the expression of lncRNA PVT1 on the proliferation, apoptosis and oxidative stress of vascular endothelial cells induced by hyperglycemia
    LIU Bo, GU Yan, LUO Jian-hua, FAN Yuan-shuo, FENG Zhi-yu
    CJAP. 2021, 37 (5): 561-565.   DOI: 10.12047/j.cjap.6128.2021.072
    Abstract   PDF (1132KB) ( 0 )
    Objective: To investigate the effects of inhibition of lncRNA PVT1 on the proliferation, apoptosis and oxidative stress of vascular endothelial cells induced by hyperglycemic. Methods: Human umbilical vein endothelial cells (HUVECs) were cultured in vitro and divided into four groups: control group (5.5 mmol/L glucose), high glucose group (30 mmol/L glucose), high glucose + siNC group (30 mmol/L glucose +siNC, negative control group), HG + siPVT1 group (30 mmol/L glucose + siPVT1, lncRNA PVT1 silencing group). The expression of PVT1 after transfection was detected by quantitative real-time PCR. MTT assay was used to detect the effect of siPVT1 (small interfering RNA PVT1) on the proliferation of HUVECs cells induced by high glucose. Flow cytometry was used to detect ROS and apoptosis of HUVECs cells induced by siPVT1. Western blot was used to detect the expression levels of apoptotic proteins such as Bax, Bcl-2, and cleaved caspase-3 in HUVECs cells. Results: Compared with the control group, after transfection with siPVT1, the expression level of PVT1 was decreased significantly (P<0.05). MTT results showed that the proliferation activity of HUVECs cells in the high-glucose group was reduced significantly after 24 h and 48 h. Compared with the HG + siNC group, the proliferation activity of HUVECs cells in the HG + siPVT1 group was increased significantly (P<0.05) after 24 h and 48 h. Flow cytometry results showed that ROS and apoptosis rate of HUVECs cells in the high-glucose group were increased significantly compared with the control group. Compared with the HG + siNC (negative control) group, ROS and apoptosis rates of HUVECs cells in the HG + siPVT1 group were reduced significantly. Compared with the control group, the expression levels of cleaved-caspase-3 and Bax in the high-glucose group were significantly up-regulated, while the expression level of Bcl-2 was down-regulated. Compared with the HG + siNC group, the expression levels of cleaved-caspase-3 and Bax were down-regulated, and the expression level of Bcl-2 was up-regulated. The differences were statistically significant (P<0.05). Conclusion: Inhibition of lncRNA PVT1 can significantly increase the proliferation activity of HUVECs cells induced by hyperglycemia, reduce oxidative stress and inhibit cell apoptosis.
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    Effects of Atrolnc-1 on immobilization induced muscular atrophy in mice hindlimbs
    SHI Hua-cai, CHEN Rui, SHE Yan-ling, ZHOU Shan-yao, LEI Si, GUO Jun
    CJAP. 2021, 37 (5): 566-570.   DOI: 10.12047/j.cjap.6074.2021.037
    Abstract   PDF (1268KB) ( 0 )
    Objective: To investigate the effects of Atrolnc-1 on immobilization induced muscular atrophy in mice hindlimbs. Methods: Male C57BL/6 mice were randomly divided into control group and immobilization group (n=10 per group). The control group did not receive any treatment. The right hindlimb of the Iimmobilization group was fixed by self-made plastic tube. After 2 weeks' immobilization, the gastrocnemius muscle was separated. Hematoxylin-eosin (HE) staining was used to observe the morphological changes and the cross-sectional area was calculated. The expressions of Atrogin-1 and atrophy-specific long non-coding RNA Atrolnc-1 were detected by quantitative real-time PCR (QRT-PCR). Western blot (WB) was used to detect the expressions of muscular atrophy fbox-1 protein (MAFbx/Atrogin-1), muscle ring finger1 (MuRF-1) in whole cell and phosphonated of nuclear factor kappaB (p-NF-κB) in cytoplasm and nucleus. Results: The gastrocnemius muscle was atrophy after 2 weeks' immobilization. Compared with the control group, the wet weight of gastrocnemius muscle was decreased (P>0.05) and the permillage of wet weight/weight of gastrocnemius muscle was decreased significantly (P<0.05). HE staining showed that the number of muscle fibers in the immobilization group were reduced, the muscle fibers were dissolved and arranged disorderly and the interstitial inflammatory cells were infiltrated; the cross-sectional area of muscle fibers was decreased (P<0.01).The expression level of atrolnc-1 was increased in immobilization group (P<0.01). The expression level of p-NF-κB in cytoplasm was decreased (P<0.01), while the expression level of p-NF-κB was increased in nucleus ( P<0.01). Besides, the expressions of atrogin-1 (P<0.01) and MuRF-1 (P<0.01) were increased. Conclusion: Immobilization induced gastrocnemius atrophy in mice may be related to the activation of NF-κB by Atrolnc-1 and then promote MuRF-1 expression.
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    TECHNICAL NOTES
    Comparative study of two high-efficiency methods for purifying spermatogonial stem cells
    ZHANG Yan, Baiyin-batu, YU Bo-yang, YANG Zheng, YUN Xia, REN Xiang-yu, LIU Tao-di
    CJAP. 2021, 37 (5): 571-576.   DOI: 10.12047/j.cjap.6046.2021.056
    Abstract   PDF (1883KB) ( 0 )
    Objective: To compare the advantages and disadvantages of the differential attachment method and immunomagnetic bead method for purification of mouse spermatogonial stem cells (mSSCs). Methods: Ten male C57BL/6 mice aged 12~15 days were selected and sacrificed by cervical dislocation. Testes were collected and the seminiferous tubule single cell suspension was obtained by enzymatic digestion. mSSCs were purified by using the differential attachment method and immunomagnetic bead method respectively. Then a detailed comparison of the two methods in terms of cell number, separation efficiency, and impact on cell proliferation and growth was conducted. Results: Both of the methods could isolate and purify stem cells from single cell suspension of mouse seminiferous tubules. mSSCs showed typical grape cluster-like clones in vitro culture, which could be continuously cultured and proliferated for over 3 months in vitro. The testes of 10 mice could obtain 3×105±0.4×105 mSSCs (n=5) by differential attachment method, cell recovery rate (the number of cells after purification/the number of cells of the single cell suspension of seminiferous tubules) was 1.5%±0.1%; 6×105±0.4×105 mSSCs (n= 5) could be obtained by immunomagnetic bead method. The recovery rate was about 3%±0.1%, and the number of stem cells obtained by the immunomagnetic bead method was higher. The stem cells obtained by the differential attachment method were more pure, because the stem cell colonies were preferentially obtained after 5 days of in vitro culture, while the stem cells obtained by the immunomagnetic bead method needed to be cultured for about 10 days before the obvious cell colonies could be observed, but the two types of purification method had no obvious effect on the long-term growth of cells in vitro. Conclusion: Both methods can get high quality mSSCs, but both methods have their own advantages and disadvantages. The differential attachment method is more economical and practical than the other, it does not require special equipment, but the stem cell number obtained is relatively lower and the time needed is longer.
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  2019-03-15

Sponsor
Chinese Association for Physiological Sciences Academy of Military Medical Sciences Institute of Health and Environmental Medicine
Associate Sponsor
Institute of Basic Medical Sciences
Editor in Chief
WANG Hai
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Editorial Board,Chinese Journal of Applide Physiology;Dali Dao,Tinanjin 300050,China



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