In Situ Silver‐Based Electrochemical Oncolytic Bioreactor

In this study, it is shown for the first time that a reduced graphene oxide (rGO) carrier has a 20‐fold higher catalysis rate than graphene oxide in Ag+ reduction. Based on this, a tumor microenvironment‐enabled in situ silver‐based electrochemical oncolytic bioreactor (SEOB) which switched Ag+ prod...

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Veröffentlicht in:Advanced materials (Weinheim) 2022-10, Vol.34 (40), p.e2109973-n/a
Hauptverfasser: Huang, Yong, Zhong, Liping, Li, Xiaotong, Wu, Pan, He, Jian, Tang, Chao, Tang, Zhiping, Su, Jing, Feng, Zhenbo, Wang, Bing, Ma, Yun, Peng, Hongmei, Bai, Zhihao, Zhong, Yi, Liang, Ying, Lu, Wenxi, Luo, Ruiyu, Li, Jinghua, Li, Haiping, Deng, Zhiming, Lan, Xianli, Liu, Ziqun, Zhang, Kun, Zhao, Yongxiang
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container_issue 40
container_start_page e2109973
container_title Advanced materials (Weinheim)
container_volume 34
creator Huang, Yong
Zhong, Liping
Li, Xiaotong
Wu, Pan
He, Jian
Tang, Chao
Tang, Zhiping
Su, Jing
Feng, Zhenbo
Wang, Bing
Ma, Yun
Peng, Hongmei
Bai, Zhihao
Zhong, Yi
Liang, Ying
Lu, Wenxi
Luo, Ruiyu
Li, Jinghua
Li, Haiping
Deng, Zhiming
Lan, Xianli
Liu, Ziqun
Zhang, Kun
Zhao, Yongxiang
description In this study, it is shown for the first time that a reduced graphene oxide (rGO) carrier has a 20‐fold higher catalysis rate than graphene oxide in Ag+ reduction. Based on this, a tumor microenvironment‐enabled in situ silver‐based electrochemical oncolytic bioreactor (SEOB) which switched Ag+ prodrugs into in situ therapeutic silver nanoparticles with and above 95% transition rate is constructed to inhibit the growths of various tumors. In this SEOB‐enabled intratumoral nanosynthetic medicine, intratumoral H2O2 and rGO act as the reductant and the catalyst, respectively. Chelation of aptamers to the SEOB‐unlocked prodrugs increases the production of silver nanoparticles in tumor cells, especially in the presence of Vitamin C, which is broken down in tumor cells to supply massive amounts of H2O2. Consequently, apoptosis and pyroptosis are induced to cooperatively contribute to the considerably‐elevated anti‐tumor effects on subcutaneous HepG2 and A549 tumors and orthotopic implanted HepG2 tumors in livers of nude mice. The specific aptamer targeting and intratumoral silver nanoparticle production guarantee excellent biosafety since it fails to elicit tissue damages in monkeys, which greatly increases the clinical translation potential of the SEOB system. A tumor microenvironment‐enabled in situ silver‐based electrochemical oncolytic bioreactor has been established to unlock anti‐tumor Ag+ prodrugs for highly‐efficient subcutaneous and orthotopic tumor recession via activating reactive oxygen species production, wherein reduced graphene oxide featuring 20‐fold larger catalysis rate than graphene oxide allows intratumoral H2O2 as reductants to reduce Ag+ into silver nanoparticles especially after uniting with VitC‐mediated H2O2 production.
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subjects 5,5′,6,6′‐tetrachloro‐1,1,3,3′‐tetraethylbenzimidazolyl carbocyanine iodide
Animals
Apoptosis
aptamer targeting
Ascorbic Acid
Bioreactors
Catalysis
Chelation
Drugs
Electrochemical Techniques
Graphene
Graphite
Hydrogen peroxide
intratumoral silver‐based nanosynthetic prodrugs
Materials science
Metal Nanoparticles
Mice
Mice, Nude
Nanoparticles
primate biosafety
Prodrugs
Reducing Agents
Silver
silver‐based electrochemical oncolytic bioreactors
Tumors
title In Situ Silver‐Based Electrochemical Oncolytic Bioreactor
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