Abstract:
BACKGROUND:Cisplatin-Induced Peripheral Neuropathy (CIPN) is a frequent serious dose-dependent adverse event that can determine dosage limitations for cancer treatment. CIPN severity correlates with the amount of platinum detected in sensory neurons of the dorsal root ganglia (DRG). However, the exact pathophysiology of CIPN is poorly understood, so the chance of developing neuroprotective treatment is reduced. The aim of this study was to determine the exact mechanisms involved in CIPN development. METHODS:By single-cell RNA-sequencing (scRNAseq), we have studied the transcriptomic profile of DRG sensory neurons from a well characterized neurophysiological mice model of CIPN. RESULTS:Gene Ontology analysis of the scRNAseq data indicated that cisplatin treatment induces the up regulation of biological pathways related with DNA damage response (DDR) in the DRG neuronal population. Moreover, DRG neurons also upregulated the Cdkn1a gene, confirmed later by the measurement of its protein product p21. While apoptosis activation pathways were not observed in DRG sensory neurons of cisplatin-treated mice, these neurons did express several senescence hallmarks, including senescence-associated β-galactosidase, phospho-H2AX and nuclear Nfkb-p65 proteins. CONCLUSIONS:In this study, we determined that after cisplatin-induced DNA damage, p21 appears as the most relevant downstream factor of the DDR in DRG sensory neurons in vivo, which survive in a non-functional senescence-like state.
journal_name
Neuro Oncoljournal_title
Neuro-oncologyauthors
Calls A,Torres-Espin A,Navarro X,Yuste VJ,Udina E,Bruna Jdoi
10.1093/neuonc/noaa151subject
Has Abstractpub_date
2020-06-29 00:00:00eissn
1522-8517issn
1523-5866pii
5864737pub_type
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