机构地区:[1]Department of Orthopedic Surgery,The First Affiliated Hospital,Zhejiang University School of Medicine,Hangzhou 310003,China [2]Zhejiang University,Hangzhou 310058,China
出 处:《Research》2024年第4期236-251,共16页研究(英文)
基 金:supported by the Key Research Program in Zhejiang Province,Science Technology Department of Zhejiang Province(2020C03042);National Natural Science Foundation of China(81772382 and 22161132027);Health Science and Technology Project of Zhejiang Province(2021KY153 and 2023KY098);China Postdoctoral Science Foundation(grant no.2023M743117);Zhejiang Provincial Natural Science Foundation of China(grant no.Q24H060010);the National Natural Science Foundation of China(82102599).
摘 要:While mesenchymal stem cell(MSC)shows great potentials in treating intervertebral disc degeneration,most MSC die soon after intradiscal transplantation,resulting in inferior therapeutic efficacy.Currently,bulk hydrogels are the common solution to improve MSC survival in tissues,although hydrogel encapsulation impairs MSC migration and disrupts extracellular microenvironment.Cell hydrogel encapsulation has been proposed to overcome the limitation of traditional bulk hydrogels,yet this technique has not been used in treating disc degeneration.Using a layer-by-layer self-assembly technique,we fabricated alginate and gelatin microgel to encapsulate individual MSC for treating disc degeneration.The small size of microgel allowed intradiscal injection of coated MSC.We demonstrated that pyroptosis was involved in MSC death under oxidative stress stimulation,and microgel coating suppressed pyroptosis activation by maintaining mitochondria homeostasis.Microgel coating protected MSC in the harsh disc microenvironment,while retaining vital cellular functions such as migration,proliferation,and differentiation.In a rat model of disc degeneration,coated MSC exhibits prolonged retention in the disc and better efficacy of attenuating disc degeneration,as compared with bare MSC treatment alone.Further,microgel-coated MSC exhibited improved therapeutic effects in treating disc degeneration via suppressing the activation of pyroptosis in the disc.For the first time,microgel-encapsulated MSC was used to treat disc degeneration and obtain encouraging outcomes.The developed biocompatible single-cell hydrogel is an effective strategy to protect MSC and maintain cellular functions and may be an efficacious approach to improving the efficacy of MSC therapy in treating disc degeneration.The objective of this study is to improve the efficacy of cell therapy for treating disc degeneration using single-cell hydrogel encapsulation and further to understand related cytoprotective mechanisms.
关 键 词:DEGENERATION protective retaining
分 类 号:R32[医药卫生—人体解剖和组织胚胎学]
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