Elevation of ISG15 promotes diabetic kidney disease by modulating renal tubular epithelial cell pyroptosis
Abstract Background Fibrosis and inflammation in the renal tubular epithelial cells (TECs) are key contributors to the pathology of diabetic kidney disease (DKD). Nevertheless, the precise triggers of these processes remain unclear. This study aimed to explore the role of interferon‐stimulated gene...
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Wiley
2025-06-01
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| Series: | Clinical and Translational Medicine |
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| Online Access: | https://doi.org/10.1002/ctm2.70337 |
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| author | Lingzhi Huang Xinyi Chen Yawen Shao Shujun Deng Chen Wang Jianqiao Chen Yongsheng Xie Siming Yuan Liqin Tang |
| author_facet | Lingzhi Huang Xinyi Chen Yawen Shao Shujun Deng Chen Wang Jianqiao Chen Yongsheng Xie Siming Yuan Liqin Tang |
| author_sort | Lingzhi Huang |
| collection | DOAJ |
| description | Abstract Background Fibrosis and inflammation in the renal tubular epithelial cells (TECs) are key contributors to the pathology of diabetic kidney disease (DKD). Nevertheless, the precise triggers of these processes remain unclear. This study aimed to explore the role of interferon‐stimulated gene 15 (ISG15) in the injury of TECs induced by high glucose (HG) conditions and its implications for the development of DKD. Methods ISG15 knockout (ISG15 KO) mice injected with streptozotocin‐treated mice on a high‐fat diet were used to investigate its role in DKD. Cellular models with ISG15 knockdown were exposed to HG conditions to assess the effects of ISG15 on cellular responses. Subsequently, we evaluated the impact of ISG15 on pyroptosis, a form of programmed cell death, to understand its potential role in DKD pathology. Furthermore, RNA sequencing (RNA‐seq) and molecular biology techniques were employed to explore the signalling pathways potentially regulated by ISG15. Results We first confirmed an up‐regulation of ISG15 within the renal tubule in DKD. The deletion of ISG15 alleviated renal functional damage, fibrosis and inflammation, which correlated with reduced ISGylation levels. Mechanistic investigation revealed that HG stimulation in TECs disrupted the mtDNA–cGAS–STING signalling, which exacerbates the DKD through the NLRP3–CASP1–GSDMD axis. Furthermore, we uncovered a bidirectional regulatory loop between STING and ISG15, with STING enhancing ISG15 expression upstream and ISG15 modulating STING expression through ISGylation. Conclusion ISG15–mtDNA–STING emerges as a critical hub that integrates the processes of pyroptosis, fibrosis and inflammation. Therapeutic interventions that target this signalling network at various levels may pave the way for innovative treatments for DKD. Key points ISG15 is highly expressed in both DKD mice and renal tubular epithelial cell cultured in HG condition. ISG15 promotes DKD pyroptosis via NLRP3–CASP1–GSDMD axis. ISG15–mtDNA–STING emerges as a critical hub that integrates the processes of pyroptosis. |
| format | Article |
| id | doaj-art-616d1c87b1ec43efa83eea34f5c22e7a |
| institution | Kabale University |
| issn | 2001-1326 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Wiley |
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| series | Clinical and Translational Medicine |
| spelling | doaj-art-616d1c87b1ec43efa83eea34f5c22e7a2025-08-20T03:26:29ZengWileyClinical and Translational Medicine2001-13262025-06-01156n/an/a10.1002/ctm2.70337Elevation of ISG15 promotes diabetic kidney disease by modulating renal tubular epithelial cell pyroptosisLingzhi Huang0Xinyi Chen1Yawen Shao2Shujun Deng3Chen Wang4Jianqiao Chen5Yongsheng Xie6Siming Yuan7Liqin Tang8Department of PharmacyThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChinaAnhui Provincial Key Laboratory of Precision Pharmaceutical Preparations and Clinical PharmacyThe First Affiliated Hospital of USTCHefei Anhui ChinaDepartment of PharmacyThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChinaDepartment of PharmacyThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChinaDepartment of PharmacyThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChinaDepartment of PharmacyThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChinaDepartment of PharmacyThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChinaDepartment of PharmacyThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChinaDepartment of PharmacyThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChinaAbstract Background Fibrosis and inflammation in the renal tubular epithelial cells (TECs) are key contributors to the pathology of diabetic kidney disease (DKD). Nevertheless, the precise triggers of these processes remain unclear. This study aimed to explore the role of interferon‐stimulated gene 15 (ISG15) in the injury of TECs induced by high glucose (HG) conditions and its implications for the development of DKD. Methods ISG15 knockout (ISG15 KO) mice injected with streptozotocin‐treated mice on a high‐fat diet were used to investigate its role in DKD. Cellular models with ISG15 knockdown were exposed to HG conditions to assess the effects of ISG15 on cellular responses. Subsequently, we evaluated the impact of ISG15 on pyroptosis, a form of programmed cell death, to understand its potential role in DKD pathology. Furthermore, RNA sequencing (RNA‐seq) and molecular biology techniques were employed to explore the signalling pathways potentially regulated by ISG15. Results We first confirmed an up‐regulation of ISG15 within the renal tubule in DKD. The deletion of ISG15 alleviated renal functional damage, fibrosis and inflammation, which correlated with reduced ISGylation levels. Mechanistic investigation revealed that HG stimulation in TECs disrupted the mtDNA–cGAS–STING signalling, which exacerbates the DKD through the NLRP3–CASP1–GSDMD axis. Furthermore, we uncovered a bidirectional regulatory loop between STING and ISG15, with STING enhancing ISG15 expression upstream and ISG15 modulating STING expression through ISGylation. Conclusion ISG15–mtDNA–STING emerges as a critical hub that integrates the processes of pyroptosis, fibrosis and inflammation. Therapeutic interventions that target this signalling network at various levels may pave the way for innovative treatments for DKD. Key points ISG15 is highly expressed in both DKD mice and renal tubular epithelial cell cultured in HG condition. ISG15 promotes DKD pyroptosis via NLRP3–CASP1–GSDMD axis. ISG15–mtDNA–STING emerges as a critical hub that integrates the processes of pyroptosis.https://doi.org/10.1002/ctm2.70337diabetic kidney diseasefibrosisISG15pyroptosisrenal tubular epithelial cells |
| spellingShingle | Lingzhi Huang Xinyi Chen Yawen Shao Shujun Deng Chen Wang Jianqiao Chen Yongsheng Xie Siming Yuan Liqin Tang Elevation of ISG15 promotes diabetic kidney disease by modulating renal tubular epithelial cell pyroptosis Clinical and Translational Medicine diabetic kidney disease fibrosis ISG15 pyroptosis renal tubular epithelial cells |
| title | Elevation of ISG15 promotes diabetic kidney disease by modulating renal tubular epithelial cell pyroptosis |
| title_full | Elevation of ISG15 promotes diabetic kidney disease by modulating renal tubular epithelial cell pyroptosis |
| title_fullStr | Elevation of ISG15 promotes diabetic kidney disease by modulating renal tubular epithelial cell pyroptosis |
| title_full_unstemmed | Elevation of ISG15 promotes diabetic kidney disease by modulating renal tubular epithelial cell pyroptosis |
| title_short | Elevation of ISG15 promotes diabetic kidney disease by modulating renal tubular epithelial cell pyroptosis |
| title_sort | elevation of isg15 promotes diabetic kidney disease by modulating renal tubular epithelial cell pyroptosis |
| topic | diabetic kidney disease fibrosis ISG15 pyroptosis renal tubular epithelial cells |
| url | https://doi.org/10.1002/ctm2.70337 |
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