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Zhou Y, Liao Q, Li D, Chen L, Zhang H, Yi B. Vitamin D receptor alleviates lipid peroxidation in diabetic nephropathy by regulating ACLY/Nrf2/Keap1 pathway. FASEB J 2024; 38:e70060. [PMID: 39302807 DOI: 10.1096/fj.202401543r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2024] [Revised: 08/31/2024] [Accepted: 09/05/2024] [Indexed: 09/22/2024]
Abstract
The membrane lipid damage caused by reactive oxygen species(ROS) and various peroxides, namely lipid peroxidation, plays an important role in the progression of diabetic nephropathy (DN).We previously reported that vitamin D receptor(VDR) plays an active role in DN mice by modulating autophagy disorders. However, it is unclear whether the ATP-citrate lyase (ACLY)/NF-E2-related factor-2 (Nrf2)/Kelch-like ECH-associated protein 1 (Keap1) pathway is associated with the reduction of lipid peroxidation by VDR in the DN model. We found that in the DN mouse model, VDR knockout significantly aggravated mitochondrial morphological damage caused by DN, increased the expression of ACLY, promoted the accumulation of ROS, lipid peroxidation products Malondialdehyde(MDA) and 4-hydroxy-2-nonenal (4-HNE),consumed the Nrf2/Keap1 system, thus increasing lipid peroxidation. However, the overexpression of VDR and intervention with the VDR agonist paricalcitol (Pari) can reduce the above damage. On the other hand, cellular experiments have shown that Pari can significantly reduce the elevated expression of ACLY and ROS induced by advanced glycation end products (AGE). However, ACLY overexpression partially eliminated the positive effects of the VDR agonist. Next, we verified the transcriptional regulation of ACLY by VDR through chromatin immunoprecipitation (ChIP)-qPCR and dual luciferase experiments. Moreover, in AGE models, knockdown of ACLY decreased lipid peroxidation and ROS production, while intervention with Nrf2 inhibitor ML385 partially weakened the protective effect of ACLY downregulation. In summary, VDR negatively regulates the expression of ACLY through transcription, thereby affecting the state of Nrf2/Keap1 system and regulating lipid peroxidation, thereby inhibiting kidney injury induced by DN.
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Affiliation(s)
- Yueyi Zhou
- Department of Nephrology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
- The Critical Kidney Disease Research Center of Central South University, Changsha, Hunan, China
| | - Qin Liao
- Department of Anesthesiology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Dan Li
- Department of Nephrology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
- The Critical Kidney Disease Research Center of Central South University, Changsha, Hunan, China
| | - Li Chen
- Department of Nephrology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
- The Critical Kidney Disease Research Center of Central South University, Changsha, Hunan, China
| | - Hao Zhang
- Department of Nephrology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
- The Critical Kidney Disease Research Center of Central South University, Changsha, Hunan, China
| | - Bin Yi
- Department of Nephrology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
- The Critical Kidney Disease Research Center of Central South University, Changsha, Hunan, China
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Li J, Jiang H, Zhu Y, Ma Z, Li B, Dong J, Xiao C, Hu A. Fine particulate matter (PM 2.5) induces the stem cell-like properties of hepatocellular carcinoma by activating ROS/Nrf2/Keap1-mediated autophagy. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 272:116052. [PMID: 38325274 DOI: 10.1016/j.ecoenv.2024.116052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/18/2024] [Accepted: 01/27/2024] [Indexed: 02/09/2024]
Abstract
Exposure to fine particulate matter (PM2.5) has been linked to an increased incidence and mortality of hepatocellular carcinoma (HCC). However, the impact of PM2.5 exposure on HCC progression and the underlying mechanisms remain largely unknown. This study aimed to investigate the effects of PM2.5 exposure on the stem cell-like properties of HCC cells. Our findings indicate that PM2.5 exposure significantly enhances the stemness of HCC cells (p < 0.01). Subsequently, male nude mice were divided into two groups (n = 8/group for tumor-bearing assay, n = 5/group for metastasis assay) for control and PM2.5 exposure. In vivo assays revealed that exposure to PM2.5 promoted the growth, metastasis, and epithelial-mesenchymal transition (EMT) of HCC cells (p < 0.01). Further exploration demonstrated that PM2.5 enhances the stemness of HCC cells by inducing cellular reactive oxygen species (ROS) generation (p < 0.05). Mechanistic investigation indicated that elevated intracellular ROS inhibited kelch-like ECH-associated protein 1 (Keap1) levels, promoting the upregulation and nucleus translocation of NFE2-like bZIP transcription factor 2 (Nrf2). This, in turn, induced autophagy activation, thereby promoting the stemness of HCC cells (p < 0.01). Our present study demonstrates the adverse effects of PM2.5 exposure on HCC development and highlights the mechanism of ROS/Nrf2/Keap1-mediated autophagy. For the first time, we reveal the impact of PM2.5 exposure on the poor prognosis-associated cellular phenotype of HCC and its underlying mechanism, which is expected to provide new theoretical basis for the improvement of public health.
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Affiliation(s)
- Jiujiu Li
- Hefei Center for Disease Control and Prevention, Hefei 230032, China
| | - Haoqi Jiang
- School of Public Health, Anhui Medical University, Hefei 230032, China
| | - Yu Zhu
- Hefei Center for Disease Control and Prevention, Hefei 230032, China
| | - Zijian Ma
- Hefei Center for Disease Control and Prevention, Hefei 230032, China
| | - Bin Li
- School of Public Health, Anhui Medical University, Hefei 230032, China
| | - Jun Dong
- Hefei Center for Disease Control and Prevention, Hefei 230032, China
| | - Changchun Xiao
- Hefei Center for Disease Control and Prevention, Hefei 230032, China.
| | - Anla Hu
- School of Public Health, Anhui Medical University, Hefei 230032, China.
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