Updates on human equilibrative nucleoside transporter 1 in neoplastic diseases / 国际儿科学杂志

The human equilibrative nucleoside transporter 1(hENT1)is a multi-integrated membrane protein that mediates the transport of nucleosides, nucleobases and nucleoside analogs.It is mainly distributed on the cell membrane in humans.hENT1 maintains the homeostasis of cells and the intracellular concentration of nucleoside drugs through facilitating diffusion, thereby affecting DNA and RNA synthesis, cell signaling, metabolic regulation and tumor chemotherapy.This article reviews the progress in the structure and function of hENT1, the distribution in tumor tissues, the nucleoside analogs response and the prognosis of neoplastic diseases.

Updates on human equilibrative nucleoside transporter 1 in neoplastic diseases / 国际儿科学杂志

The human equilibrative nucleoside transporter 1 (hENT1) is a multi-integrated membrane protein that mediates the transport of nucleosides,nucleobases and nucleoside analogs.It is mainly distributed on the cell membrane in humans.hENT1 maintains the homeostasis of cells and the intracellular concentration of nucleoside drugs through facilitating diffusion,thereby affecting DNA and RNA synthesis,cell signaling,metabolic regulation and rumor chemotherapy.This article reviews the progress in the structure and function of hENT1,the distribution in tumor tissues,the nucleoside analogs response and the prognosis of neoplastic diseases.

MiR-26b regulates invasion and migration of lung cancer cells through targeting hENTI depending on RhoA/ROCK-I pathway / 中南大学学报(医学版)

Objective:To investigate the effect of miR-26b on the invasion and migration of lung cancer cell and to explore its mechanism.Methods:qPCR was used to detect the expression of miR-26b in lung cancer.Luciferase reporter gene was used to detect interaction between miR-26b and hENT1.Transwell assay was used to detect invasion ability after treatment of miR-26b mimics.Scratch assay was used to detect migration ability after treatment of miR-26b mimics.The expressions of hENT1,ROCK-I and RhoA were detected by Western blot.The changes of cytoskeleton after miR-26b mimics treatment with phalloidin were observed.The effect of miR-26b mimics on the tumor size and volume of lung cancer was determined by subcutaneous tumor formation in nude mice.Results:MiR-26b expression was significantly reduced in lung cancer.With the progress of lung cancer,the expression of miR-26b was reduced.With the progress in differentiation of lung cancer,the expression of miR-26b was decreased.Decrease of miR-26b was associated with lung cancer lymph node metastasis.HENT1 was the direct target of miR-26b;miR-26b regulated the invasion and migration ability of human lung carcinoma A549 cells.MiR-26b regulated the expression of hENT1,ROCK-1 and RhoA.After the treatment with miR-26b mimics,the F-actin staining was significantly reduced,whereas the formation of wrinkles and the formation of pseudopodia were significantly reduced.Subcutaneous tumor formation in nude mice showed that miR-26b mimics treatment significantly reduced the tumor size and mass.Conclusion:MiR-26b plays a role in tumor suppression in lung cancer.miR-26b can regulate the invasion and migration ability of lung carcinoma A549 cells by targeting hENT1 depending on the RhoA/ROCK-1 pathway.

Relationship between human equilibrative nucleoside transporter 1 and gemcitabine chemoresistance in pancreatic cancer / 国际外科学杂志

Gemcitabine has become a first-line chemotherapeutic durg.Unfortunately,many patients fail to derive benefits from gemcitabine in clinics.The variability of human equilibrative nucleoside transporter 1 (hENT1)expression in tumor cells,which plays a dominant role in the transport of gemcitabine across the cell membrane,may be one of the reason for gemcitabine chemoresistance in pancreatic cancer.