ArticleJournal of applied genetics2024
Peptidylprolyl isomerase D circular RNA sensitizes breast cancer to trastuzumab through remodeling HER2 N4-acetylcytidine modification.
Article in Journal of applied genetics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 7 citations in OpenAlex.
- RNA N4-acetylcytidine modification in health and cancer: molecular mechanisms, cellular plasticity, and therapeutic opportunities.Biomarker research · 2026Review
- The functions, mechanisms and clinical relevance of RNA and protein acetyltransferase NAT10: a comprehensive review.Cell biology and toxicology · 2026Review
- Review
- The function of NAT10-driven N4-acetylcytidine modification in cancer: novel insights and potential therapeutic targets.Cell & bioscience · 2025Review
- Circular RNAs orchestrating breast cancer hallmarks: bridging tumor biology and therapy resistance.Functional & integrative genomics · 2025Review
- The mechanism of ncRNA in trastuzumab resistance in HER2-positive tumors.Medical oncology (Northwood, London, England) · 2025Review
- Article
- Emerging roles of RNA N4-acetylcytidine modification in reproductive health.Protein & cell · 2025Review
- Role of circular RNAs in cancer therapy resistance.Molecular cancer · 2025Review
- Exploring the Clinical Transformation of circRNA as a Biomarker in Breast Cancer.Cancer control : journal of the Moffitt Cancer CenterReview
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Authors and funding
8 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Human epidermal growth factor receptor 2 (HER2) overexpression and activation are crucial for trastuzumab resistance in HER2-positive breast cancer; however, the potential regulatory mechanism of HER2 is still largely undetermined. In this study, a novel circular RNA derived from peptidylprolyl isomerase D (PPID) is identified as a negative regulator of trastuzumab resistance. Circ-PPID is highly stable and significantly downregulated in trastuzumab-resistant cells and tissues. Restoration of circ-PPID markedly enhances HER2-positive breast cell sensitivity to trastuzumab in vitro and in vivo. Circ-PPID directly binds to N-acetyltransferase 10 (NAT10) in the nucleus and blocks the interaction between NAT10 and HER2 mRNA, reducing N4-acetylcytidine (ac4C) modification on HER2 exon 25, leading to HER2 mRNA decay. Intriguingly, the subcellular localization of circ-PPID differs between trastuzumab-sensitive and -resistant cells. Circ-PPID in trastuzumab-resistant cells is located more in the cytoplasm, mainly due to the upregulation of Exportin 4 (XPO4), which results in the loss of spatial conditions for circ-PPID to bind to nuclear NAT10. Taken together, our data suggest that circ-PPID is a previously unappreciated ac4C-dependent HER2 epigenetic regulator, providing a promising therapeutic direction for overcoming trastuzumab resistance in clinical setting.
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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 Socratic graph.