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Podocyte injury is a key factor underlying proteinuria in DN. Metadherin (MTDH) participates in podocyte apoptosis and promotes renal tubular injury in DN. However, its role in podocyte damage and podocyte cytoskeleton remodeling requires further investigation. PTEN plays a crucial role in maintaining podocyte integrity; however, the mechanisms governing PTEN stability in DN remain poorly understood. This study is aimed at investigating the specific functional role of MTDH in PTEN regulation using db\/db diabetic mice, human kidney biopsy samples from DN patients, and cultured mouse podocytes exposed to high glucose (HG). MTDH expression was markedly increased in DN kidneys and HG\u2010stimulated podocytes. Elevated MTDH resulted in decreased PTEN protein expression levels without altering PTEN mRNA expression, suggesting a posttranscriptional regulatory mechanism. Further assays demonstrated that MTDH promoted PTEN degradation through the ubiquitin\u2013proteasome pathway. Through bioinformatics analysis of the GSE96804 dataset from the Gene Expression Omnibus (GEO) database, obtaining 13,289 differentially expressed genes and comparing them with the known ubiquitin ligase\u2013encoding genes obtained from the Genecards database, we identified candidate hub genes involved in PTEN ubiquitination\u2010mediated degradation. RNA sequencing identified ubiquitin\u2010conjugating enzyme E2N (UBE2N) as a critical downstream mediator positively regulated by MTDH. Subsequent coimmunoprecipitation experiments confirmed direct interactions between PTEN and UBE2N, enhancing PTEN ubiquitination. Knockdown of UBE2N attenuated MTDH\u2010induced PTEN degradation and podocyte cytoskeletal remodeling. Collectively, our findings reveal a novel regulatory axis wherein MTDH accelerates PTEN ubiquitination and proteasomal degradation via UBE2N, contributing to podocyte injury in DN. Targeting MTDH\u2010driven PTEN ubiquitination degradation presents a promising therapeutic strategy to protect podocytes and mitigate diabetic kidney injury.<\/jats:p>","DOI":"10.1155\/humu\/8914266","type":"journal-article","created":{"date-parts":[[2026,5,14]],"date-time":"2026-05-14T04:25:07Z","timestamp":1778732707000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Experimental Validation and Bioinformatics Analysis Elucidate the Role of MTDH\u2010Mediated PTEN Ubiquitination and Degradation in Podocyte Injury in Diabetic Kidney Disease"],"prefix":"10.1155","volume":"2026","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-2102-7709","authenticated-orcid":false,"given":"Zerong","family":"Zheng","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-4199-8132","authenticated-orcid":false,"given":"Danping","family":"Tao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenting","family":"Wu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hui","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lingyu","family":"Shen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8205-5974","authenticated-orcid":false,"given":"Xiaoyang","family":"He","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaohong","family":"Zheng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yihao","family":"Long","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinzhu","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaowen","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fenfen","family":"Peng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6891-8916","authenticated-orcid":false,"given":"Haibo","family":"Long","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-4505-2932","authenticated-orcid":false,"given":"Congwei","family":"Luo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,5,13]]},"reference":[{"key":"e_1_2_11_1_2","doi-asserted-by":"publisher","DOI":"10.2174\/0115665232258527230919071328"},{"key":"e_1_2_11_2_2","doi-asserted-by":"publisher","DOI":"10.1038\/nrendo.2017.151"},{"key":"e_1_2_11_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.kint.2022.05.012"},{"key":"e_1_2_11_4_2","doi-asserted-by":"publisher","DOI":"10.1159\/000481633"},{"key":"e_1_2_11_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.kint.2016.01.012"},{"key":"e_1_2_11_6_2","doi-asserted-by":"publisher","DOI":"10.1042\/CS20210625"},{"key":"e_1_2_11_7_2","doi-asserted-by":"publisher","DOI":"10.1681\/ASN.2017090993"},{"key":"e_1_2_11_8_2","doi-asserted-by":"publisher","DOI":"10.1681\/ASN.2006101084"},{"key":"e_1_2_11_9_2","doi-asserted-by":"publisher","DOI":"10.1083\/jcb.139.1.193"},{"key":"e_1_2_11_10_2","doi-asserted-by":"publisher","DOI":"10.1038\/sj.onc.1205445"},{"key":"e_1_2_11_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1535-6108(04)00079-0"},{"key":"e_1_2_11_12_2","doi-asserted-by":"publisher","DOI":"10.1038\/bjc.2014.267"},{"key":"e_1_2_11_13_2","doi-asserted-by":"publisher","DOI":"10.1038\/cddis.2016.335"},{"key":"e_1_2_11_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.trsl.2023.11.006"},{"key":"e_1_2_11_15_2","doi-asserted-by":"publisher","DOI":"10.2174\/0113892029265367231013113304"},{"key":"e_1_2_11_16_2","doi-asserted-by":"publisher","DOI":"10.1152\/ajprenal.00575.2017"},{"key":"e_1_2_11_17_2","doi-asserted-by":"publisher","DOI":"10.3892\/ijmm.2017.3269"},{"key":"e_1_2_11_18_2","doi-asserted-by":"publisher","DOI":"10.1186\/s12906-020-2825-9"},{"key":"e_1_2_11_19_2","doi-asserted-by":"publisher","DOI":"10.1093\/nar\/gky1079"},{"key":"e_1_2_11_20_2","doi-asserted-by":"publisher","DOI":"10.3390\/cells9071700"},{"key":"e_1_2_11_21_2","doi-asserted-by":"publisher","DOI":"10.1158\/0008-5472.CAN-20-1876"},{"key":"e_1_2_11_22_2","doi-asserted-by":"publisher","DOI":"10.1038\/s43018-021-00279-5"},{"key":"e_1_2_11_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.phrs.2019.104506"},{"key":"e_1_2_11_24_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41580-018-0015-0"},{"key":"e_1_2_11_25_2","doi-asserted-by":"publisher","DOI":"10.2174\/0109298665265642231020043809"},{"key":"e_1_2_11_26_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0960-9822(00)00417-6"},{"key":"e_1_2_11_27_2","doi-asserted-by":"publisher","DOI":"10.1002\/path.4508"},{"key":"e_1_2_11_28_2","doi-asserted-by":"publisher","DOI":"10.3389\/fonc.2020.01569"},{"key":"e_1_2_11_29_2","doi-asserted-by":"publisher","DOI":"10.2174\/1566523222666220901112314"},{"key":"e_1_2_11_30_2","doi-asserted-by":"publisher","DOI":"10.2174\/1874467216666221220111756"}],"container-title":["Human 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