ArticleToxicological sciences : an official journal of the Society of Toxicology2016
Prolonged Particulate Hexavalent Chromium Exposure Suppresses Homologous Recombination Repair in Human Lung Cells.
Article in Toxicological sciences : an official journal of the Society of Toxicology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.
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Who cites it
28 citing papers in PubMed, 54 citations in OpenAlex.
- RMI2 knockdown suppresses ovarian cancer cell growth by impairing DNA damage repair via the ATR/CHK1 signaling pathway.In vitro cellular & developmental biology. Animal · 2026Article
- Particulate Hexavalent Chromium Inhibits RAD51 Paralogs Necessary for RAD51 Filament Formation and Stabilization During Homologous Recombination Repair.Occupational Health · 2026Article
- It's a gator tale: Alligator lung cells resist hexavalent chromium-induced DNA repair inhibition and chromosome instability.Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) · 2026Article
- Trivalent chromium interacts directly with acetylated lysine.Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) · 2025Article
- Hexavalent chromium exposure impacts the metabolome of human lung fibroblast cells.Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) · 2025Article
- Oropharyngeal aspiration of particulate hexavalent chromium increases chromium levels in lung and liver, and induces essential metal dyshomeostasis in lung, liver, and blood.Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) · 2025Article
- Particulate hexavalent chromium inhibits global transcription of genes in DNA repair pathways, particularly targeting homologous recombination repair, base excision repair, mismatch repair and microhomology-mediated end-joining.Journal of hazardous materials · 2025Article
- Particulate hexavalent chromium exposure induces DNA double-strand breaks and inhibits homologous recombination repair in rat and human lung tissues.Chemosphere · 2025Article
- Investigating the heavy metal (Hg, Cd, Pb, Cr, As) binding affinity and sensing capability of 2-((2-(hydroxymethyl)quinolin-8-yl)oxy)-N-(quinolin-8-yl)acetamide.Frontiers in chemistry · 2025Article
- Carcinogenic Mechanisms of Hexavalent Chromium: From DNA Breaks to Chromosome Instability and Neoplastic Transformation.Current environmental health reports · 2024Review
- Prolonged Particulate Hexavalent Chromium Exposure Induces DNA Double-Strand Breaks and Inhibits Homologous Recombination Repair in Primary Rodent Lung Cells.Biological trace element research · 2024Article
- Acute particulate hexavalent chromium exposure induces DNA double-strand breaks and activates homologous recombination repair in rat lung tissue.Toxicological sciences : an official journal of the Society of Toxicology · 2024Article
- A whale of a tale: whale cells evade the driving mechanism for hexavalent chromium-induced chromosome instability.Toxicological sciences : an official journal of the Society of Toxicology · 2024Article
- Hexavalent Chromium Targets Securin to Drive Numerical Chromosome Instability in Human Lung Cells.International journal of molecular sciences · 2023Article
- Prolonged particulate hexavalent chromium exposure induces RAD51 foci inhibition and cytoplasmic accumulation in immortalized and primary human lung bronchial epithelial cells.Toxicology and applied pharmacology · 2023Article
- Impact of Manganese and Chromate on Specific DNA Double-Strand Break Repair Pathways.International journal of molecular sciences · 2023Article
- Particulate hexavalent chromium alters microRNAs in human lung cells that target key carcinogenic pathways.Toxicology and applied pharmacology · 2022Article
- Current understanding of hexavalent chromium [Cr(VI)] neurotoxicity and new perspectives.Environment international · 2022Review
- miRNA dysregulation is an emerging modulator of genomic instability.Seminars in cancer biology · 2021Review
- Particulate Hexavalent Chromium Inhibits E2F1 Leading to Reduced RAD51 Nuclear Foci Formation in Human Lung Cells.Toxicological sciences : an official journal of the Society of Toxicology · 2021Article
Corrections and comments
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Authors and funding
7 authors at 4 institutions in 1 country.
Funding
Abstract
Genomic instability is one of the primary models of carcinogenesis and a feature of almost all cancers. Homologous recombination (HR) repair protects against genomic instability by maintaining high genomic fidelity during the repair of DNA double strand breaks. The defining step of HR repair is the formation of the Rad51 nucleofilament, which facilitates the search for a homologous sequence and invasion of the template DNA strand. Particulate hexavalent chromium (Cr(VI)), a human lung carcinogen, induces DNA double strand breaks and chromosome instability. Since the loss of HR repair increases Cr(VI)-induced chromosome instability, we investigated the effect of extended Cr(VI) exposure on HR repair. We show acute (24 h) Cr(VI) exposure induces a normal HR repair response. In contrast, prolonged (120 h) exposure to particulate Cr(VI) inhibited HR repair and Rad51 nucleofilament formation. Prolonged Cr(VI) exposure had a profound effect on Rad51, evidenced by reduced protein levels and Rad51 mislocalization to the cytoplasm. The response of proteins involved in Rad51 nuclear import and nucleofilament formation displayed varying responses to prolonged Cr(VI) exposure. BRCA2 formed nuclear foci after prolonged Cr(VI) exposure, while Rad51C foci formation was suppressed. These results suggest that particulate Cr(VI), a major chemical carcinogen, inhibits HR repair by targeting Rad51, causing DNA double strand breaks to be repaired by a low fidelity, Rad51-independent repair pathway. These results further enhance our understanding of the underlying mechanism of Cr(VI)-induced chromosome instability and thus, carcinogenesis.
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