c-Jun-mediated microRNA-302d-3p induces RPE dedifferentiation by targeting p21Waf1/Cip1
Open accessAbstract
Dedifferentiation of retinal pigment epithelium (RPE) cells and choroidal neovascularization (CNV) contributes to the pathogenesis of age-related macular degeneration (AMD). MicroRNAs (miRNAs) have crucial roles in AMD onset and progression. We thus aim to investigate the effects of miRNAs on RPE dedifferentiation and endothelium cell (EC) behavior, and analyze its downstream pathways. We have previously identified miR-302d-3p as the most downregulated miRNA signature along with RPE differentiation. Herein, in vitro study supported that miR-302d-3p induces RPE dedifferentiation typified by reduction of RPE characteristic markers, interrupts its phagocytosis, and promotes its migration, proliferation, and cell-cycle progression. c-Jun was identified as a potential upstream transcript factor for MIR302D, which might modulate RPE function by regulating miR-302d-3p expression. P21 Waf1/Cip1, a cyclin-dependent kinase inhibitor encoded by the CDKN1A gene, was identified as a downstream target of miR-302d-3p. Our data suggested that p21 Waf1/Cip1 could promote RPE differentiation, and inhibit its proliferation, migration, and cell-cycle progression. We also demonstrated that miR-302d-3p suppresses RPE differentiation through directly targeting p21 Waf1/Cip1. In addition, the miR-302d-3p/CDKN1A axis was also involved in regulating tube formation of ECs, indicating its potential involvement in CNV formation. Taken together, our study implies that miR-302d-3p, regulated by c-Jun, contributes to the pathogenesis of both atrophic and exudative AMD. MiR-302d-3p promotes RPE dedifferentiation, migration, proliferation and cell-cycle progression, inhibits RPE phagocytosis, and induces abnormal EC behavior by targeting p21 Waf1/Cip1. Pharmacological miR-302d-3p inhibitors are prospective therapeutic options for prevention and treatment of AMD.
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miR-302d-3p is overexpressed in RPEs of AMD patients and targets CDNK1A and p21Waf1/Cip1, inducing RPE dedifferentiation, cell cycle progression, proliferation, migration, and inhibiting phagocytosis.
“MiR-302d-3p is overexpressed in RPEs of AMD patients. It targets products of CDNK1A and p21Waf1/Cip1, inducing RPE dedifferentiation, cell cycle progression, proliferation, migration, and inhibiting phagocytosis [272].”
From MicroRNAs as Regulators of Phagocytosis (2022) · cites this paper as [272]
The Results sections on CDKN1A targeting and RPE phagocytosis, together with the Discussion, support the reported effects on RPE differentiation, cell-cycle progression, proliferation, migration, and phagocytosis. They do not establish that miR-302d-3p is overexpressed in RPE cells from AMD patients; the experiments described used cultured RPE cells. The gene is CDKN1A (not CDNK1A), and p21Waf1/Cip1 is its encoded protein, not a separate target. (LLM, conf=0.88)
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Cited by
Sorted by citations
MicroRNAs as Regulators of Phagocytosis
Gierlikowski, W., & Gierlikowska, B. (2022) · Cells · doi:10.3390/cells11091380 · Cited by 25 · see citing works
- Authors
- Jiang, C., Xie, P., Sun, R., Sun, X., Liu, G., Ding, S., Zhu, M., Yan, B., Liu, Q., Chen, X., & Zhao, C.
- Affiliations
- Jiangsu Province Hospital (CN)
- Zhengzhou Children's Hospital (CN)
- Shandong University (CN)
- The University of Sydney (AU)
- Shanghai Medical College of Fudan University (CN)
- Corresponding author
- Chen, Xue
- Zhao, Chen
- Venue
- Cell Death & Disease
- Published
- 2018-04-18
- Volume
- 9
- Issue
- 5
- Pages
- 451-451
- ISSN
- 2041-4889 (ISSN-L)
- PMC
- PMC5906557
- OpenAlex
- W2800610903
- Cited by
- 21
- References
- 3
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 1 · 2023: 3 · 2022: 5 · 2021: 2 · 2020: 4 · 2019: 2
- FWCI
- 2.01
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Cell Death and Disease (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- National Natural Science Foundation of China (81525006, 81700877, 81730025, 81670864)
- Government of Jiangsu Province
- Natural Science Foundation of Jiangsu Province (BK20171087)
- Nanjing Medical University
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Topics
- Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
- Keywords
- c-Jun, p21, choroidal neovascularization, age-related macular degeneration, endothelial tube formation, cell proliferation and migration, cell cycle progression, microRNA target regulation
- MeSH terms
- Cell Cycle, Epithelial Cells, Humans, Macular Degeneration, Proto-Oncogene Proteins c-jun, MicroRNAs, Cyclin-Dependent Kinase Inhibitor p21, Cell Dedifferentiation, Retinal Pigment Epithelium, Human Umbilical Vein Endothelial Cells
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