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Articles by Han Dong
Total Records ( 3 ) for Han Dong
  Xun Wang , Haifeng Liu , Ling Zhao , Han Dong , Yuhao Wang , Di Sun , Yuyin Liu , Ruqi Yang and Xuewei Li
  To study the effects of Crude Polysaccharides from Catathelasma ventricosum (CVCP) on proliferation and differentiation of 3T3-L1 preadipocyte. 3T3-L1 cells were treated with culture media contained different concentrations of CVCP (0, 150, 300 and 600 μg mL-1) for 24 h and subsequently cell proliferation was assayed by MTT Method. The extent of the differentiation was determined by fluescence spectrophotometry and Nile Red staining on days 8 after treatment with culture media supplemented with different concentration CVCP (0, 150, 300 and 600 μg mL-1). As the results, the different concentration CVCP (150, 300 and 600 μg mL-1) promoted proliferation of 3T3-L1 preadipocytes when compared with the control (p<0.05). And it stimulated cell differentiation into adipocyte at low concentration (150 μg mL-1) while it inhibited cell differentiation into adipocyte at higher concentration (300 and 600 μg mL-1). But the difference was not significant (p>0.05). Besides, lipid content in 3T3-L1 cells treated with 150 μg mL-1 was significantly higher than treated with 600 μg mL-1 (p<0.05). It can be concluded from the results that the CVCP promoted proliferation of the 3T3-L1 cells 24 h after treatment. Meanwhile, it was involved to some extent in regulation of adipogenesis and lipogenesis.
  Xun Wang , Haifeng Liu , Ling Zhao , Han Dong , Zhengxin Yan , Hengmin Cui and Xuewei Li
  Constitutive Androstane Receptor (CAR) is one of members of the nuclear receptors superfamily which is involved in induction of drug metabolism and lipogenic pathway. In this study, the reseachers investigated whether the mRNA expression pattern of CAR in porcine preadipocyte is changed during the process of induced differentiation. Preadipocytes were aseptically taken from 3 days old piglet under general anesthesia and grown to near confluence. Postconfluent cells (Day 0) were further cultured in differentiation medium for 3 days. From day 3 onward, the cells were cultured in maintain-medium based on differentiation medium without roglitazone and IBMX until day 15. The total RNA was isolated on seven time points (i.e., days 0, 2, 4, 6, 8, 10 and 15). The mRNA expression changes of the CAR before and after porcine primary preadipocytes differentiation that acorss seven time points (i.e., days 0, 2, 4, 6, 8, 10 and 15) were measured using the quantitative RT-PCR method. In addition, the researchers also examined lipid accumulation and the mRNA expression of adpocyte differentiation markers (Such as PPARγ and RXRα) which confirmed the differentiation of preadipocytes to adipocytes. The results showed that the mRNA expression of CAR was up-regulated during porcine primary preadipocyte differentiation. There is the reason that the CAR may be involved in the process of preadipocyte differentiation and is a potential drug target for the treatment of obesity and diabetes.
  Xun Wang , Haifeng Liu , Ling Zhao , Han Dong , Chunyou Ning , Xuewei Li and Hengmin Cui
  To study the effects of crude polysaccharides from Poria cocos (PCCP) on proliferation and differentiation of 3T3-L1 preadipocyte. 3T3-L1 cells were treated with culture medium contained different concentrations of PCCP (0, 50, 100 and 200 μg mL-1) for 48 h and subsequently cell proliferation was assayed by MTT Method. The extent of the differentiation was determined by fluescence spectrophotometry and Oil Red O staining on days 8 after treatment with culture medium supplemented with different concentration PCCP (0, 50, 100 and 200 μg mL-1). As the results, the different concentration PCCP (50, 100 and 200 μg mL-1) inhibited to some extent proliferation of 3T3-L1 preadipocytes when compared with the control. But the difference is not significant (p>0.05). And PCCP stimulated cell differentiation into adipocyte at lower concentration (50 and 100 μg mL-1) (p<0.05) while it inhibited cell differentiation into adipocyte at high concentration (200 μg mL-1) (p>0.05). It can be concluded from the results that the PCCP was involved in regulation of adipogenesis and lipogenesis.
 
 
 
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