设置养分贮存损失状态不同的4类培养液,分别添加一定浓度梯度的L-谷氨酰胺(L-G lu tam ine,L-G ln)培养大鼠前体脂肪细胞。通过形态学观察、M TT比色、油红O染色提取法,比较各组细胞形态及增殖与分化的效果。结果表明,添加0 mm o l/L L-...设置养分贮存损失状态不同的4类培养液,分别添加一定浓度梯度的L-谷氨酰胺(L-G lu tam ine,L-G ln)培养大鼠前体脂肪细胞。通过形态学观察、M TT比色、油红O染色提取法,比较各组细胞形态及增殖与分化的效果。结果表明,添加0 mm o l/L L-G ln的新鲜培养液和配制后4℃冷藏20 d,再添加0.685 mm o l/L L-G ln的培养液,均较利于前体脂肪细胞的增殖与分化;配制后4℃冷藏90 d的培养液,对前体脂肪细胞培养效果较差,添加L-G ln也不能使培养效果得到改善。另外,启封后的M 199和胎牛血清(F eta l C a lf Serum,FCS)分别冷藏不宜超过90 d。说明及时满足培养液中L-G ln的需求量,可使前体脂肪细胞达到较好的增殖与分化状态。展开更多
Two new sesquiterpene lactone glycosides were isolated from the seeds of Carpesium macrocephalum. Their structures were elucidated as 2-O--D-glucopyranosy-5? 11?H- eudesma-4 (15)-en-12, 8?olide and 2 ?O--D-glucopyran...Two new sesquiterpene lactone glycosides were isolated from the seeds of Carpesium macrocephalum. Their structures were elucidated as 2-O--D-glucopyranosy-5? 11?H- eudesma-4 (15)-en-12, 8?olide and 2 ?O--D-glucopyranosy-5?H-eudesma-4 (15), 11 (13)- dien-12, 8?olide by spectral methods (HRMS, 1 D and 2 D NMR).展开更多
文摘设置养分贮存损失状态不同的4类培养液,分别添加一定浓度梯度的L-谷氨酰胺(L-G lu tam ine,L-G ln)培养大鼠前体脂肪细胞。通过形态学观察、M TT比色、油红O染色提取法,比较各组细胞形态及增殖与分化的效果。结果表明,添加0 mm o l/L L-G ln的新鲜培养液和配制后4℃冷藏20 d,再添加0.685 mm o l/L L-G ln的培养液,均较利于前体脂肪细胞的增殖与分化;配制后4℃冷藏90 d的培养液,对前体脂肪细胞培养效果较差,添加L-G ln也不能使培养效果得到改善。另外,启封后的M 199和胎牛血清(F eta l C a lf Serum,FCS)分别冷藏不宜超过90 d。说明及时满足培养液中L-G ln的需求量,可使前体脂肪细胞达到较好的增殖与分化状态。
基金We are grateful for the NNSFC (No. 29972017) and the FMEC (No. 98073003).
文摘Two new sesquiterpene lactone glycosides were isolated from the seeds of Carpesium macrocephalum. Their structures were elucidated as 2-O--D-glucopyranosy-5? 11?H- eudesma-4 (15)-en-12, 8?olide and 2 ?O--D-glucopyranosy-5?H-eudesma-4 (15), 11 (13)- dien-12, 8?olide by spectral methods (HRMS, 1 D and 2 D NMR).