西亚试剂：Macropinocytosis of protein is an amino acid supply route i

发布时间：2025-07-12

Macropinocytosis of protein is an amino acid supply route in Ras-transformed cells

Cosimo Commisso, Shawn M. Davidson, Rengin G. Soydaner-Azeloglu, Seth J. Parker, Jurre J. Kamphorst, Sean Hackett, Elda Grabocka, Michel Nofal, Jeffrey A. Drebin, Craig B. Thompson, Joshua D. Rabinowitz, Christian M. Metallo, Matthew G. Vander Heiden & Dafna Bar-Sagi

Macropinocytosis is a highly conserved endocytic process by which extracellular fluid and its contents are internalized into cells through large, heterogeneous vesicles known as macropinosomes. Oncogenic Ras proteins have been shown to stimulate macropinocytosis but the functional contribution of this uptake mechanism to the transformed phenotype remains unknown. Here we show that Ras-transformed cells use macropinocytosis to transport extracellular protein into the cell. The internalized protein undergoes proteolytic degradation, yielding amino acids including glutamine that can enter central carbon metabolism. Accordingly, the dependence of Ras-transformed cells on free extracellular glutamine for growth can be suppressed by the macropinocytic uptake of protein. Consistent with macropinocytosis representing an important route of nutrient uptake in tumours, its pharmacological inhibition compromises the growth of Ras-transformed pancreatic tumour xenografts. These results identify macropinocytosis as a mechanism by which cancer cells support their unique metabolic needs and point to the possible exploitation of this process in the design of anticancer therapies.

 

• 以上资料由西亚试剂：http://www.xiyashiji.com/ 提供此产品的详细信息如密度,含量,分子式,分子量等均可在西亚官网查询   
• 相关产品如诺卡氏菌液(-)-樟脑神经鞘磷脂,从牛脑所得 杨梅苷愈创奥IAPN-叔丁基苯硫腈氯化物4-溴苯基五氟化硫色胺盐酸盐4-溴噻吩-2-甲醛纤维素粉 7-(二甲基氨基)-4-三氟甲基香豆素邻硝基苯肼盐酸盐3,3'-二氨基联苯胺四盐酸盐水合物美伐他汀丁卡因阿卡明全氟辛基季胺碘化物布西拉明硫酸多粘菌素B益母草浸膏黄苓干膏 L-2,3-二氨基丙酸盐酸盐黄糊精EB替代品(GoldView)等均有销售.欢迎订购

上一篇：推进化工行业的数字化变革
下一篇：西亚试剂 ：Cell Reports：MicroDNAs或可帮助检测机体癌症