摘要
本试验选择离体犊牛小肠上皮细胞,以细胞增殖率和葡萄糖吸收率作为细胞生长发育与功能成熟的指标,研究了胰岛素与胰岛素样生长因子-I(IGF-)对细胞生长发育的影响。结果表明,胰岛素浓度为10μg/ml时,明显促进小肠上皮细胞的增殖和对葡萄糖的吸收,浓度达到50μg/ml时则抑制细胞的增殖和吸收(P<0.01)。IGF-I浓度为100ng/ml时,对促进小肠上皮细胞增殖和吸收葡萄糖的作用最强(P<0.01),但100ng/ml、500ng/ml和1000ng/ml三种不同浓度的IGF-I对刺激细胞增殖和提高吸收功能无显著差异(P>0.05)。
The calf intestinal epithelial cells in vitro(CIEC)were selected to evaluate the trophic actions of insulin and IGF-I. The cell proliferation and glucose absorption were investigated. Results showed that insulin with a dosage of 10μg/ml and IGF-I with 100ng/ml both had strong stimulating effects on the proliferation and glucose absorption of CIEC( P< 0.01) , while insulin with a dosage of 50μg/ml inhibited the proliferation and glucose absorption of CIEC(P<0.01). IGF-I with concentration exceeded 100ng/ml(500ng/ml and 1000ng/ml in this experiment)showed saturated effect. This suggested that IGF-I at a dosage of 100ng/ml,500ng/ml or 1000ng/ml had similar actions. The results suggested that natural growth factors in colostrum had significantly effects on the growth and functional development of intestinal epithelial cells in vitro.
出处
《细胞生物学杂志》
CSCD
北大核心
2002年第3期176-179,共4页
Chinese Journal of Cell Biology
基金
教育部高校骨干教师项目E200012
香港大学合作课题X9911