“Pincer movement”:Reversing cisplatin resistance based on simultaneous glutathione depletion and glutathione S-transferases inhibition by redox-responsive degradable organosilica hybrid nanoparticles  

作　　者：Boyi Niu Yixian Zhou Kaixin Liao Ting Wen Sixian Lao Guilan Quan Xin Pan Chuanbin Wu 

机构地区：[1]School of Pharmaceutical Sciences,Sun Yat-sen University,Guangzhou 510006,China [2]College of Pharmacy,Jinan University,Guangzhou 510632,China

出　　处：《Acta Pharmaceutica Sinica B》2022年第4期2074-2088,共15页药学学报（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.81803466);the Natural Science Foundation of Guangdong Province(No.2018A030310095,China);the Key Areas Research and Development Program of Guangdong Province(No.2019B020204002,China).

摘　　要：The therapeutic efficacy of cisplatin has been restricted by drug resistance of cancers.Intracellular glutathione(GSH)detoxification of cisplatin under the catalysis of glutathione S-transferases(GST)plays important roles in the development of cisplatin resistance.Herein,a strategy of“pincer movement”based on simultaneous GSH depletion and GST inhibition is proposed to enhance cisplatin-based chemotherapy.Specifically,a redox-responsive nanomedicine based on disulfide-bridged degradable organosilica hybrid nanoparticles is developed and loaded with cisplatin and ethacrynic acid(EA),a GST inhibitor.Responding to high level of intracellular GSH,the hybrid nanoparticles can be gradually degraded due to the break of disulfide bonds,which further promotes drug release.Meanwhile,the disulfide-mediated GSH depletion and EA-induced GST inhibition cooperatively prevent cellular detoxification of cisplatin and reverse drug resistance.Moreover,the nanomedicine is integrated into microneedles for intralesional drug delivery against cisplatin-resistant melanoma.The in vivo results show that the nanomedicine-loaded microneedles can achieve significant GSH depletion,GST inhibition,and consequent tumor growth suppression.Overall,this research provides a promising strategy for the construction of new-type nanomedicines to overcome cisplatin resistance,which extends the biomedical application of organosilica hybrid nanomaterials and enables more efficient chemotherapy against drug-resistant cancers.

关 键 词：Cancer therapy CISPLATIN Drug resistance Glutathione depletion Glutathione Stransferases Disulfide bonds Organosilica hybrid nanoparticles Ethacrynic acid 

分 类 号：R943[医药卫生—药剂学]