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耗竭衰老样神经元细胞可减轻小鼠顺铂诱导的周围神经病。

Depletion of senescent-like neuronal cells alleviates cisplatin-induced peripheral neuropathy in mice.

机构信息

Department of Radiation Oncology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.

Division of Nephrology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.

出版信息

Sci Rep. 2020 Aug 25;10(1):14170. doi: 10.1038/s41598-020-71042-6.

Abstract

Chemotherapy-induced peripheral neuropathy is among the most common dose-limiting adverse effects of cancer treatment, leading to dose reduction and discontinuation of life-saving chemotherapy and a permanently impaired quality of life for patients. Currently, no effective treatment or prevention is available. Senescence induced during cancer treatment has been shown to promote the adverse effects. Here, we show that cisplatin induces senescent-like neuronal cells in primary culture and in mouse dorsal root ganglia (DRG), as determined by the characteristic senescence markers including senescence-associated beta-galactosidase, accumulation of cytosolic p16 and HMGB1, as well as increased expression of p16Ink4a, p21, and MMP-9. The accumulation of senescent-like neuronal cells in DRG is associated with cisplatin-induced peripheral neuropathy (CIPN) in mice. To determine if depletion of senescent-like neuronal cells may effectively mitigate CIPN, we used a pharmacological 'senolytic' agent, ABT263, which inhibits the anti-apoptotic proteins BCL-2 and BCL-xL and selectively kills senescent cells. Our results demonstrated that clearance of DRG senescent neuronal cells reverses CIPN, suggesting that senescent-like neurons play a role in CIPN pathogenesis. This finding was further validated using transgenic p16-3MR mice, which permit ganciclovir (GCV) to selectively kill senescent cells expressing herpes simplex virus 1 thymidine kinase (HSV-TK). We showed that CIPN was alleviated upon GCV administration to p16-3MR mice. Together, the results suggest that clearance of senescent DRG neuronal cells following platinum-based cancer treatment might be an effective therapy for the debilitating side effect of CIPN.

摘要

化疗引起的周围神经病是癌症治疗中最常见的剂量限制不良反应之一,导致剂量减少和挽救生命的化疗中断,并使患者的生活质量永久受损。目前,尚无有效的治疗或预防方法。已经表明,癌症治疗过程中诱导的衰老会促进不良反应。在这里,我们表明顺铂在原代培养物和小鼠背根神经节 (DRG) 中诱导衰老样神经元细胞,这是通过包括衰老相关β-半乳糖苷酶在内的特征性衰老标记物确定的,细胞质 p16 和 HMGB1 的积累,以及 p16Ink4a、p21 和 MMP-9 的表达增加。DRG 中衰老样神经元细胞的积累与小鼠顺铂诱导的周围神经病 (CIPN) 相关。为了确定是否耗尽衰老样神经元细胞可能有效减轻 CIPN,我们使用了一种药理学“衰老细胞清除剂”ABT263,它抑制抗凋亡蛋白 BCL-2 和 BCL-xL,并选择性杀死衰老细胞。我们的结果表明,清除 DRG 衰老神经元细胞可逆转 CIPN,表明衰老样神经元在 CIPN 发病机制中起作用。这一发现使用表达单纯疱疹病毒 1 胸苷激酶 (HSV-TK) 的 p16-3MR 转基因小鼠进一步得到验证,该小鼠允许更昔洛韦 (GCV) 选择性杀死衰老细胞。我们表明,在用 GCV 处理 p16-3MR 小鼠后,CIPN 得到缓解。总之,这些结果表明,在基于铂的癌症治疗后清除衰老的 DRG 神经元细胞可能是治疗 CIPN 这种衰弱性副作用的有效疗法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e9c/7447787/f1449f04ecfe/41598_2020_71042_Fig1_HTML.jpg

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