Cell softness reveals tumorigenic potential via ITGB8/AKT/glycolysis signaling in a mice model of orthotopic bladder cancer  

作　　者：Shi Qiu Yaqi Qiu Linghui Deng Ling Nie Liming Ge Xiaonan Zheng Di Jin Kun Jin Xianghong Zhou Xingyang Su Boyu Cai Jiakun Li Xiang Tu Lina Gong Liangren Liu Zhenhua Liu Yige Bao Jianzhong Ai Tianhai Lin Lu Yang Qiang Wei 

机构地区：[1]Department of Urology,Institute of Urology,National Clinical Research Center for Geriatrics and Center of Biomedical Big Data,West China Hospital of Sichuan University,Chengdu,Sichuan 610041,China [2]Department of Molecular Oncology,Institute of Oncology Research(IOR),Oncology Institute of Southern Switzerland(IOSI),Bellinzona 6500,Switzerland [3]Department of Science and Drug Technology,University of Turin,Turin,Italy [4]National Clinical Research Center of Geriatrics,The Center of Gerontology and Geriatrics,West China Hospital,Sichuan University,Chengdu,Sichuan 610000,China [5]Department of Pathology,West China Hospital,Sichuan University,Chengdu,Sichuan 610041,China [6]Department of Pharmaceutics and Bioengineering,School of Chemical Engineering,Sichuan University,Chengdu,Sichuan 610000,China

出　　处：《Chinese Medical Journal》2024年第2期209-221,共13页中华医学杂志（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.81902578,81974098,8197032158);China Postdoctoral Science Foundation(No.2020M670057ZX);Programs from Science and Technology Department of Sichuan Province(No.2021YJ0462);Post-doctoral Science Research Foundation of Sichuan University(No.2020SCU12041);Post-Doctor Research Project,West China Hospital,Sichuan University(Nos.2018HXBH084,2019HXBH092);the National key research and development program of China(No.2020YFC2008601)

摘　　要：Background:Bladder cancer,characterized by a high potential of tumor recurrence,has high lifelong monitoring and treatment costs.To date,tumor cells with intrinsic softness have been identified to function as cancer stem cells in several cancer types.Nonetheless,the existence of soft tumor cells in bladder tumors remains elusive.Thus,our study aimed to develop a microbarrier microfluidic chip to efficiently isolate deformable tumor cells from distinct types of bladder cancer cells.Methods:The stiffness of bladder cancer cells was determined by atomic force microscopy(AFM).The modified microfluidic chip was utilized to separate soft cells,and the 3D Matrigel culture system was to maintain the softness of tumor cells.Expression patterns of integrinβ8(ITGB8),protein kinase B(AKT),and mammalian target of rapamycin(mTOR)were determined by Western blotting.Double immunostaining was conducted to examine the interaction between F-actin and tripartite motif containing 59(TRIM59).The stem-cell-like characteristics of soft cells were explored by colony formation assay and in vivo studies upon xenografted tumor models.Results:Using our newly designed microfluidic approach,we identified a small fraction of soft tumor cells in bladder cancer cells.More importantly,the existence of soft tumor cells was confirmed in clinical human bladder cancer specimens,in which the number of soft tumor cells was associated with tumor relapse.Furthermore,we demonstrated that the biomechanical stimuli arising from 3D Matrigel activated the F-actin/ITGB8/TRIM59/AKT/mTOR/glycolysis pathways to enhance the softness and tumorigenic capacity of tumor cells.Simultaneously,we detected a remarkable up-regulation in ITGB8,TRIM59,and phospho-AKT in clinical bladder recurrent tumors compared with their non-recurrent counterparts.Conclusions:The ITGB8/TRIM59/AKT/mTOR/glycolysis axis plays a crucial role in modulating tumor softness and stemness.Meanwhile,the soft tumor cells become more sensitive to chemotherapy after stiffening,that offers new insights f

关 键 词：Soft tumor cells 3D Matrigel STEMNESS Non-muscle invasive bladder neoplasms Microfluidic analytical techniques 

分 类 号：R737.14[医药卫生—肿瘤] R-332[医药卫生—临床医学]