ArticleEnvironmental toxicology and pharmacology2024
Chronic arsenic exposure suppresses proteasomal and autophagic protein degradation.
Article in Environmental toxicology and pharmacology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed, 3 citations in OpenAlex.
- Arsenic disrupts autophagosome-lysosome fusion in a zinc dependent manner across multiple human skin and lung cells lines.Archives of toxicology · 2026Article
- Chronic arsenic exposure and hsa-miR-186 overexpression causes transcriptome-wide differential alternative splicing contributing to skin carcinogenesis in human HaCaT cell line.Archives of toxicology · 2025Article
- Dysregulation of mRNA expression by hsa-miR-186 overexpression in arsenic-induced skin carcinogenesis.Toxicology and applied pharmacology · 2025Article
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Authors and funding
5 authors at 1 institution in 1 country.
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Abstract
Ubiquitin Proteasomal System (UPS) and autophagy dysregulation initiate cancer. These pathways are regulated by zinc finger proteins. Trivalent inorganic arsenic (iAs) displaces zinc from zinc finger proteins disrupting functions of important cellular proteins. The effect of chronic environmental iAs exposure (100 nM) on UPS has not been studied. We tested the hypothesis that environmental iAs exposure suppresses UPS, activating autophagy as a compensatory mechanism. We exposed skin (HaCaT and Ker-CT; independent quadruplicates) and lung (BEAS-2B; independent triplicates) cell cultures to 0 or 100 nM iAs for 7 or 8 weeks. We quantified ER stress (XBP1 splicing employing Reverse Transcriptase -Polymerase Chain Reaction), proteasomal degradation (immunoblots), and initiation and completion of autophagy (immunoblots). We demonstrate that chronic iAs exposure suppresses UPS, initiates autophagy, but suppresses autophagic protein degradation in skin and lung cell lines. Our data suggest that chronic iAs exposure inhibits autophagy which subsequently suppresses UPS.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.