目的:研究海参及其所含各主要活性成分对正常大鼠脂质代谢的影响。方法:将Wistar大鼠随机分为7组:正常对照组、整参组、皂苷组、多糖组、胶原多肽组、除皂苷残余物组和残渣组。连续饲喂28d,分别测定大鼠血清总胆固醇(total cholesterol,...目的:研究海参及其所含各主要活性成分对正常大鼠脂质代谢的影响。方法:将Wistar大鼠随机分为7组:正常对照组、整参组、皂苷组、多糖组、胶原多肽组、除皂苷残余物组和残渣组。连续饲喂28d,分别测定大鼠血清总胆固醇(total cholesterol,TC)、甘油三酯(triglyceride,TG)、高密度脂蛋白胆固醇(high density li-poprotein-cholesterol,HDL-C)含量,以及肝脏TC、TG、磷脂(phospholipid,PL)含量。并检测了皂苷、多糖对脂肪酸合成酶(FAS)活性的抑制作用。结果:海参可抑制体内脂肪囤积,显著降低肾周脂肪含量。海参还可明显降低血清和肝脏中TC、TG浓度,以皂苷、多糖的效果最佳。另外,海参皂苷、多糖对FAS具有直接抑制作用,且皂苷抑制效果更强。结论:海参中的主要活性成分对大鼠脂肪代谢影响明显不同,皂苷降脂效果优于多糖。展开更多
The regulation of nutrient transportation and transformation in developing anthers is very complex. We analyzed the distribution and features of polysaccharides and lipids in the developing anthers of tomatoes using h...The regulation of nutrient transportation and transformation in developing anthers is very complex. We analyzed the distribution and features of polysaccharides and lipids in the developing anthers of tomatoes using histochemical methods. Some starches appeared in the connective somatic tissue of anthers during the sporogenous cell stage. Before meiosis of the microspore mother cell,a thick polysaccharide callose wall was formed,accompanied by a reduction in the connective tissue starches. During the tetrad stage after meiosis,the polysaccharide material in the anther did not change. At the early microspore stage,the starches in the connective cells again increased,and polysaccharide material appeared in the partial intine of pollen. At the late microspore stage,a large vacuole formed that did not contain lipids or starches,and only the pollen wall contained red polysaccharides. At this stage,the connective somatic cell starch amounts decreased,and the tapetal cells changed shape and degenerated. After microspore division,abundant lipids appeared in the bicellular pollen,and starches accumulated following pollen development. As the anthers matured,many lipids and some starches accumulated in the epidermal cells. Nutrient metabolism within the tomato pollen characteristically accumulated lipids first and then starches,while the mature pollen accumulated starches and lipids simultaneously. This characteristic pattern of nutrient metabolism in tomato pollen shows species specificity among plants.展开更多
文摘目的:研究海参及其所含各主要活性成分对正常大鼠脂质代谢的影响。方法:将Wistar大鼠随机分为7组:正常对照组、整参组、皂苷组、多糖组、胶原多肽组、除皂苷残余物组和残渣组。连续饲喂28d,分别测定大鼠血清总胆固醇(total cholesterol,TC)、甘油三酯(triglyceride,TG)、高密度脂蛋白胆固醇(high density li-poprotein-cholesterol,HDL-C)含量,以及肝脏TC、TG、磷脂(phospholipid,PL)含量。并检测了皂苷、多糖对脂肪酸合成酶(FAS)活性的抑制作用。结果:海参可抑制体内脂肪囤积,显著降低肾周脂肪含量。海参还可明显降低血清和肝脏中TC、TG浓度,以皂苷、多糖的效果最佳。另外,海参皂苷、多糖对FAS具有直接抑制作用,且皂苷抑制效果更强。结论:海参中的主要活性成分对大鼠脂肪代谢影响明显不同,皂苷降脂效果优于多糖。
基金supported by the National Natural Science Foundation of China(No.31100225,31170289)
文摘The regulation of nutrient transportation and transformation in developing anthers is very complex. We analyzed the distribution and features of polysaccharides and lipids in the developing anthers of tomatoes using histochemical methods. Some starches appeared in the connective somatic tissue of anthers during the sporogenous cell stage. Before meiosis of the microspore mother cell,a thick polysaccharide callose wall was formed,accompanied by a reduction in the connective tissue starches. During the tetrad stage after meiosis,the polysaccharide material in the anther did not change. At the early microspore stage,the starches in the connective cells again increased,and polysaccharide material appeared in the partial intine of pollen. At the late microspore stage,a large vacuole formed that did not contain lipids or starches,and only the pollen wall contained red polysaccharides. At this stage,the connective somatic cell starch amounts decreased,and the tapetal cells changed shape and degenerated. After microspore division,abundant lipids appeared in the bicellular pollen,and starches accumulated following pollen development. As the anthers matured,many lipids and some starches accumulated in the epidermal cells. Nutrient metabolism within the tomato pollen characteristically accumulated lipids first and then starches,while the mature pollen accumulated starches and lipids simultaneously. This characteristic pattern of nutrient metabolism in tomato pollen shows species specificity among plants.
