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Zhang X, Wu W, Li Y, Peng Z. Exploring the role and therapeutic potential of lipid metabolism in acute kidney injury. Ren Fail 2024; 46:2403652. [PMID: 39319697 PMCID: PMC11425701 DOI: 10.1080/0886022x.2024.2403652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Revised: 09/06/2024] [Accepted: 09/06/2024] [Indexed: 09/26/2024] Open
Abstract
Acute kidney injury (AKI) is a prevalent condition, yet no specific treatment is available. Extensive research has revealed the pivotal role of lipid-related alterations in AKI. Lipid metabolism plays an essential role in the sustenance of the kidneys. In addition to their energy-supplying function, lipids contribute to the formation of renal biomembranes and the establishment of the renal microenvironment. Moreover, lipids or their metabolites actively participate in signal transduction, which governs various vital biological processes, such as proliferation, differentiation, apoptosis, autophagy, and epithelial-mesenchymal transition. While previous studies have focused predominantly on abnormalities in lipid metabolism in chronic kidney disease, this review focuses on lipid metabolism anomalies in AKI. We explore the significance of lipid metabolism products as potential biomarkers for the early diagnosis and classification of AKI. Additionally, this review assesses current preclinical investigations on the modulation of lipid metabolism in the progression of AKI. Finally, on the basis of existing research, this review proposes future directions, highlights challenges, and presents novel targets and innovative ideas for the treatment of and intervention in AKI.
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Affiliation(s)
- Xiaoyu Zhang
- Department of Critical Care Medicine, Zhongnan Hospital, Wuhan University, Wuhan, China
- Clinical Research Center of Hubei Critical Care Medicine, Wuhan, China
| | - Wen Wu
- Department of Critical Care Medicine, Zhongnan Hospital, Wuhan University, Wuhan, China
- Clinical Research Center of Hubei Critical Care Medicine, Wuhan, China
- Department of Critical Care Medicine, Yichang Central People's Hospital, Yichang, China
| | - Yiming Li
- Department of Critical Care Medicine, Zhongnan Hospital, Wuhan University, Wuhan, China
- Clinical Research Center of Hubei Critical Care Medicine, Wuhan, China
| | - Zhiyong Peng
- Department of Critical Care Medicine, Zhongnan Hospital, Wuhan University, Wuhan, China
- Clinical Research Center of Hubei Critical Care Medicine, Wuhan, China
- Department of Critical Care Medicine, Center of Critical Care Nephrology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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2
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Qing J, Li C, Zhi H, Zhang L, Wu J, Li Y. Exploring macrophage heterogeneity in IgA nephropathy: Mechanisms of renal impairment and current therapeutic targets. Int Immunopharmacol 2024; 140:112748. [PMID: 39106714 DOI: 10.1016/j.intimp.2024.112748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Revised: 07/11/2024] [Accepted: 07/21/2024] [Indexed: 08/09/2024]
Abstract
The lack of understanding of the mechanism of renal injury in IgA nephropathy (IgAN) hinders the development of personalized treatment plans and targeted therapies. Improved insight into the cause of renal dysfunction in IgAN is necessary to enhance the effectiveness of strategies for slowing the progression of the disease. This study examined single cell RNA sequencing (scRNA seq) and bulk-RNA seq data and found that the gene expression of renal intrinsic cells (RIC) was significantly changed in patients with renal impairment, with a primary focus on energy metabolism. We discovered a clear metabolic reprogramming of RIC during renal function impairment (RF) using the 'scMetabolism' package, which manifested as a weakening of oxidative phosphorylation, alterations in fatty acid metabolism, and changes in glycolysis. Cellular communication analysis revealed that communication between macrophages (Ma) and RIC became more active and impacted cell function through the ligand-receptor-transcription factor (L-R-TF) axis in patients with RF. Our studies showed a notable upsurge in the expression of gene CLU and the infiltration of CLU+ Ma in patients with RF. CLU is a multifunctional protein, extensively involved in processes such as cell apoptosis and immune responses. Data obtained from the Nephroseq V5 database and multiplex immunohistochemistry (mIHC) were used to validate the findings, which were found to be robustly correlated with estimated glomerular filtration rate (eGFR) of the IgAN patients, as demonstrated by linear regression (LR). This study provides new insights into the cellular and molecular changes that occur in IgAN during renal impairment, revealing that elevated expression of CLU and CLU+ Ma percolation are common features in patients with RF. These findings offer potential targets and strategies for personalized management and targeted therapy of IgAN.
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Affiliation(s)
- Jianbo Qing
- The Fifth Clinical Medical College, Shanxi Medical University, Taiyuan 030001, China; Department of Nephrology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Changqun Li
- The Fifth Clinical Medical College, Shanxi Medical University, Taiyuan 030001, China; Department of Nephrology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Huiwen Zhi
- The Fifth Clinical Medical College, Shanxi Medical University, Taiyuan 030001, China
| | - Lijuan Zhang
- The Fifth Clinical Medical College, Shanxi Medical University, Taiyuan 030001, China
| | - Junnan Wu
- Department of Nephrology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Yafeng Li
- Department of Nephrology, Shanxi Provincial People's Hospital (Fifth Hospital), Shanxi Medical University, Taiyuan 030001, China; Medicinal Basic Research Innovation Center of Chronic Kidney Disease, Ministry of Education, Shanxi Medical University, Taiyuan 030001, China; Core Laboratory, Shanxi Provincial People's Hospital (Fifth Hospital), Shanxi Medical University, Taiyuan 030001, China; Academy of Microbial Ecology, Shanxi Medical University, Taiyuan 030001, China; Department of Nephrology, Hejin Municipal People's Hospital, Yuncheng 043300, China.
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3
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Li ZL, Li XY, Zhou Y, Wang B, Lv LL, Liu BC. Renal tubular epithelial cells response to injury in acute kidney injury. EBioMedicine 2024; 107:105294. [PMID: 39178744 PMCID: PMC11388183 DOI: 10.1016/j.ebiom.2024.105294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 07/19/2024] [Accepted: 08/06/2024] [Indexed: 08/26/2024] Open
Abstract
Acute kidney injury (AKI) is a clinical syndrome characterized by a rapid and significant decrease in renal function that can arise from various etiologies, and is associated with high morbidity and mortality. The renal tubular epithelial cells (TECs) represent the central cell type affected by AKI, and their notable regenerative capacity is critical for the recovery of renal function in afflicted patients. The adaptive repair process initiated by surviving TECs following mild AKI facilitates full renal recovery. Conversely, when injury is severe or persistent, it allows the TECs to undergo pathological responses, abnormal adaptive repair and phenotypic transformation, which will lead to the development of renal fibrosis. Given the implications of TECs fate after injury in renal outcomes, a deeper understanding of these mechanisms is necessary to identify promising therapeutic targets and biomarkers of the repair process in the human kidney.
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Affiliation(s)
- Zuo-Lin Li
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Xin-Yan Li
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Yan Zhou
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Bin Wang
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China
| | - Lin-Li Lv
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China.
| | - Bi-Cheng Liu
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, Nanjing, Jiangsu, China.
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4
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Yang S, Guo J, Xiong Y, Han G, Luo T, Peng S, Liu J, Hu T, Zha Y, Lin X, Tan Y, Zhang J. Unraveling the genetic and molecular landscape of sepsis and acute kidney injury: A comprehensive GWAS and machine learning approach. Int Immunopharmacol 2024; 137:112420. [PMID: 38851159 DOI: 10.1016/j.intimp.2024.112420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 05/29/2024] [Accepted: 06/03/2024] [Indexed: 06/10/2024]
Abstract
OBJECTIVES This study aimed to explore the underlying mechanisms of sepsis and acute kidney injury (AKI), including sepsis-associated AKI (SA-AKI), a frequent complication in critically ill sepsis patients. METHODS GWAS data was analyzed for genetic association between AKI and sepsis. Then, we systematically applied three distinct machine learning algorithms (LASSO, SVM-RFE, RF) to rigorously identify and validate signature genes of SA-AKI, assessing their diagnostic and prognostic value through ROC curves and survival analysis. The study also examined the functional and immunological aspects of these genes, potential drug targets, and ceRNA networks. A mouse model of sepsis was created to test the reliability of these signature genes. RESULTS LDSC confirmed a positive genetic correlation between AKI and sepsis, although no significant shared loci were found. Bidirectional MR analysis indicated mutual increased risks of AKI and sepsis. Then, 311 key genes common to sepsis and AKI were identified, with 42 significantly linked to sepsis prognosis. Six genes, selected through LASSO, SVM-RFE, and RF algorithms, showed excellent predictive performance for sepsis, AKI, and SA-AKI. The models demonstrated near-perfect AUCs in both training and testing datasets, and a perfect AUC in a sepsis mouse model. Significant differences in immune cells, immune-related pathways, HLA, and checkpoint genes were found between high- and low-risk groups. The study identified 62 potential drug treatments for sepsis and AKI and constructed a ceRNA network. CONCLUSIONS The identified signature genes hold potential clinical applications, including prognostic evaluation and targeted therapeutic strategies for sepsis and AKI. However, further research is needed to confirm these findings.
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Affiliation(s)
- Sha Yang
- Guizhou University Medical College, Guiyang 550025, Guizhou Province, China
| | - Jing Guo
- Guizhou University Medical College, Guiyang 550025, Guizhou Province, China
| | - Yunbiao Xiong
- Department of Neurosurgery, Guizhou Provincial People's Hospital, Guiyang, China
| | - Guoqiang Han
- Department of Neurosurgery, Guizhou Provincial People's Hospital, Guiyang, China
| | - Tao Luo
- Department of Neurosurgery, Guizhou Provincial People's Hospital, Guiyang, China
| | - Shuo Peng
- Department of Neurosurgery, Guizhou Provincial People's Hospital, Guiyang, China
| | - Jian Liu
- Guizhou University Medical College, Guiyang 550025, Guizhou Province, China; Department of Neurosurgery, Guizhou Provincial People's Hospital, Guiyang, China
| | - Tieyi Hu
- Department of Neurology, the Affiliated Dazu Hospital of Chongqing Medical University , China
| | - Yan Zha
- Guizhou University Medical College, Guiyang 550025, Guizhou Province, China; Department of Nephrology, Guizhou Provincial People's Hospital, Guiyang, China
| | - Xin Lin
- Department of Nephrology, Guizhou Provincial People's Hospital, Guiyang, China.
| | - Ying Tan
- Department of Neurosurgery, Guizhou Provincial People's Hospital, Guiyang, China.
| | - Jiqin Zhang
- Department of Anesthesiology, Guizhou Provincial People's Hospital, Guiyang, China.
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Wu L, Li Q, Lu F, Qian L, Pan Y, Chen C, Huang Z, Duan S, Zhang B, Liang H, Xing C, Mao H, Yuan Y. Mitochondrial pyruvate carrier 2 mitigates acute kidney injury via sustaining mitochondrial metabolism. Int J Biol Sci 2024; 20:4551-4565. [PMID: 39247825 PMCID: PMC11380453 DOI: 10.7150/ijbs.98627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Accepted: 08/04/2024] [Indexed: 09/10/2024] Open
Abstract
Cisplatin, a chemotherapeutic drug, can result in acute kidney injury (AKI). Currently, there are no effective prevention methods. An incomplete understanding of the pathogenesis of AKI is a major barrier to the development of effective therapies. Metabolism reprogramming shift to glycolysis was involved in AKI pathogenesis. Glycolysis results in the pyruvate production. The mitochondrial pyruvate carrier (MPC) conveys cytosol pyruvate into mitochondria, promoting the tricarboxylic acid cycle. In this current study, we found a reduction in MPC2 expression in mice and cultured HK2 cells with cisplatin-induced AKI. MPC2 overexpression attenuated cisplatin-mediated nephrotoxicity both in vitro and in vivo via restoring pyruvate metabolism and mitochondrial function. Knockdown of MPC2 reversed this effect. Furthermore, artemether, an MPC2 potential activator, could mitigate AKI via regulating MPC2-mediated pyruvate metabolism. Our findings revealed that MPC2-pyruvate metabolism axis was a promising strategy to alleviate AKI induced by cisplatin.
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Affiliation(s)
- Lin Wu
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Qing Li
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Fang Lu
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Li Qian
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Ying Pan
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Chen Chen
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Zhimin Huang
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Suyan Duan
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Bo Zhang
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Hongwei Liang
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu, China
| | - Changying Xing
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Huijuan Mao
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Yanggang Yuan
- Department of Nephrology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
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Sasaki T, Fujiwara-Tani R, Luo Y, Ogata R, Sasaki R, Ikemoto A, Nishiguchi Y, Nakashima C, Kishi S, Fujii K, Ohmori H, Oue N, Kuniyasu H. Effects of High-Mobility Group Box-1 on Mucosal Immunity and Epithelial Differentiation in Colitic Carcinoma. Int J Mol Sci 2024; 25:6846. [PMID: 38999957 PMCID: PMC11241214 DOI: 10.3390/ijms25136846] [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: 05/31/2024] [Revised: 06/13/2024] [Accepted: 06/19/2024] [Indexed: 07/14/2024] Open
Abstract
Abnormalities in mucosal immunity are involved in the onset and progression of ulcerative colitis (UC), resulting in a high incidence of colorectal cancer (CRC). While high-mobility group box-1 (HMGB1) is overexpressed during colorectal carcinogenesis, its role in UC-related carcinogenesis remains unclear. In the present study, we investigated the role of HMGB1 in UC-related carcinogenesis and sporadic CRC. Both the azoxymethane colon carcinogenesis and dextran sulfate sodium colitis carcinogenesis models demonstrated temporal increases in mucosal HMGB1 levels. Activated CD8+ cells initially increased and then decreased, whereas exhausted CD8+ cells increased. Additionally, we observed increased regulatory CD8+ cells, decreased naïve CD8+ cells, and decreased mucosal epithelial differentiation. In the in vitro study, HMGB1 induced energy reprogramming from oxidative phosphorylation to glycolysis in CD8+ cells and intestinal epithelial cells. Furthermore, in UC dysplasia, UC-related CRC, and hyperplastic mucosa surrounding human sporadic CRC, we found increased mucosal HMGB1, decreased activated CD8+ cells, and suppressed mucosal epithelial differentiation. However, we observed increased activated CD8+ cells in active UC mucosa. These findings indicate that HMGB1 plays an important role in modulating mucosal immunity and epithelial dedifferentiation in both UC-related carcinogenesis and sporadic CRC.
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Grants
- 22K11396 Ministry of Education, Culture, Sports, Science and Technology
- 19K16564 Ministry of Education, Culture, Sports, Science and Technology
- 20K21659 Ministry of Education, Culture, Sports, Science and Technology
- 21K06926 Ministry of Education, Culture, Sports, Science and Technology
- 23K19900 Ministry of Education, Culture, Sports, Science and Technology
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Affiliation(s)
- Takamitsu Sasaki
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
| | - Rina Fujiwara-Tani
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
| | - Yi Luo
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
| | - Ruiko Ogata
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
| | - Rika Sasaki
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
| | - Ayaka Ikemoto
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
| | - Yukiko Nishiguchi
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
| | - Chie Nakashima
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
| | - Shingo Kishi
- Pathology Laboratory, Research Institute, Tokushukai Nozaki Hospital, 2-10-50 Tanigawa, Daito 574-0074, Osaka, Japan;
| | - Kiyomu Fujii
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
| | - Hitoshi Ohmori
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
| | - Naohide Oue
- Pathology Laboratory, Miyoshi Central Hospital, 10531 Higashi-Sakaya, Miyoshi 728-8502, Hiroshima, Japan;
| | - Hiroki Kuniyasu
- Department of Molecular Pathology, Nara Medical University, 840 Shijo-Cho, Kashihara 634-8521, Nara, Japan; (T.S.); (Y.L.); (R.O.); (R.S.); (A.I.); (Y.N.); (C.N.); (K.F.); (H.O.)
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7
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Perico L, Remuzzi G, Benigni A. Sirtuins in kidney health and disease. Nat Rev Nephrol 2024; 20:313-329. [PMID: 38321168 DOI: 10.1038/s41581-024-00806-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2024] [Indexed: 02/08/2024]
Abstract
Sirtuins (SIRTs) are putative regulators of lifespan in model organisms. Since the initial discovery that SIRTs could promote longevity in nematodes and flies, the identification of additional properties of these proteins has led to understanding of their roles as exquisite sensors that link metabolic activity to oxidative states. SIRTs have major roles in biological processes that are important in kidney development and physiological functions, including mitochondrial metabolism, oxidative stress, autophagy, DNA repair and inflammation. Furthermore, altered SIRT activity has been implicated in the pathophysiology and progression of acute and chronic kidney diseases, including acute kidney injury, diabetic kidney disease, chronic kidney disease, polycystic kidney disease, autoimmune diseases and renal ageing. The renoprotective roles of SIRTs in these diseases make them attractive therapeutic targets. A number of SIRT-activating compounds have shown beneficial effects in kidney disease models; however, further research is needed to identify novel SIRT-targeting strategies with the potential to treat and/or prevent the progression of kidney diseases and increase the average human healthspan.
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Affiliation(s)
- Luca Perico
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Ariela Benigni
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy.
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8
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Zhong H, Tang R, Feng JH, Peng YW, Xu QY, Zhou Y, He ZY, Mei SY, Xing SP. METFORMIN MITIGATES SEPSIS-ASSOCIATED PULMONARY FIBROSIS BY PROMOTING AMPK ACTIVATION AND INHIBITING HIF-1α-INDUCED AEROBIC GLYCOLYSIS. Shock 2024; 61:283-293. [PMID: 38010091 DOI: 10.1097/shk.0000000000002275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
ABSTRACT Recent research has revealed that aerobic glycolysis has a strong correlation with sepsis-associated pulmonary fibrosis (PF). However, at present, the mechanism and pathogenesis remain unclear. We aimed to test the hypothesis that the adenosine monophosphate-activated protein kinase (AMPK) activation and suppression of hypoxia-inducible factor 1α (HIF-1α)-induced aerobic glycolysis play a central role in septic pulmonary fibrogenesis. Cellular experiments demonstrated that lipopolysaccharide increased fibroblast activation through AMPK inactivation, HIF-1α induction, alongside an augmentation of aerobic glycolysis. By contrast, the effects were reversed by AMPK activation or HIF-1α inhibition. In addition, pretreatment with metformin, which is an AMPK activator, suppresses HIF-1α expression and alleviates PF associated with sepsis, which is caused by aerobic glycolysis, in mice. Hypoxia-inducible factor 1α knockdown demonstrated similar protective effects in vivo . Our research implies that targeting AMPK activation and HIF-1α-induced aerobic glycolysis with metformin might be a practical and useful therapeutic alternative for sepsis-associated PF.
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Affiliation(s)
- Han Zhong
- Department of Critical Care Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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9
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Packer M. Fetal Reprogramming of Nutrient Surplus Signaling, O-GlcNAcylation, and the Evolution of CKD. J Am Soc Nephrol 2023; 34:1480-1491. [PMID: 37340541 PMCID: PMC10482065 DOI: 10.1681/asn.0000000000000177] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 06/07/2023] [Indexed: 06/22/2023] Open
Abstract
ABSTRACT Fetal kidney development is characterized by increased uptake of glucose, ATP production by glycolysis, and upregulation of mammalian target of rapamycin (mTOR) and hypoxia-inducible factor-1 alpha (HIF-1 α ), which (acting in concert) promote nephrogenesis in a hypoxic low-tubular-workload environment. By contrast, the healthy adult kidney is characterized by upregulation of sirtuin-1 and adenosine monophosphate-activated protein kinase, which enhances ATP production through fatty acid oxidation to fulfill the needs of a normoxic high-tubular-workload environment. During stress or injury, the kidney reverts to a fetal signaling program, which is adaptive in the short term, but is deleterious if sustained for prolonged periods when both oxygen tension and tubular workload are heightened. Prolonged increases in glucose uptake in glomerular and proximal tubular cells lead to enhanced flux through the hexosamine biosynthesis pathway; its end product-uridine diphosphate N -acetylglucosamine-drives the rapid and reversible O-GlcNAcylation of thousands of intracellular proteins, typically those that are not membrane-bound or secreted. Both O-GlcNAcylation and phosphorylation act at serine/threonine residues, but whereas phosphorylation is regulated by hundreds of specific kinases and phosphatases, O-GlcNAcylation is regulated only by O-GlcNAc transferase and O-GlcNAcase, which adds or removes N-acetylglucosamine, respectively, from target proteins. Diabetic and nondiabetic CKD is characterized by fetal reprogramming (with upregulation of mTOR and HIF-1 α ) and increased O-GlcNAcylation, both experimentally and clinically. Augmentation of O-GlcNAcylation in the adult kidney enhances oxidative stress, cell cycle entry, apoptosis, and activation of proinflammatory and profibrotic pathways, and it inhibits megalin-mediated albumin endocytosis in glomerular mesangial and proximal tubular cells-effects that can be aggravated and attenuated by augmentation and muting of O-GlcNAcylation, respectively. In addition, drugs with known nephroprotective effects-angiotensin receptor blockers, mineralocorticoid receptor antagonists, and sodium-glucose cotransporter 2 inhibitors-are accompanied by diminished O-GlcNAcylation in the kidney, although the role of such suppression in mediating their benefits has not been explored. The available evidence supports further work on the role of uridine diphosphate N -acetylglucosamine as a critical nutrient surplus sensor (acting in concert with upregulated mTOR and HIF-1 α signaling) in the development of diabetic and nondiabetic CKD.
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Affiliation(s)
- Milton Packer
- Baylor Heart and Vascular Institute , Dallas , Texas and Imperial College , London , United Kingdom
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10
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Li Z, Wang X, Peng Y, Yin H, Yu S, Zhang W, Ni X. Nlrp3 Deficiency Alleviates Lipopolysaccharide-Induced Acute Kidney Injury via Suppressing Renal Inflammation and Ferroptosis in Mice. BIOLOGY 2023; 12:1188. [PMID: 37759588 PMCID: PMC10525768 DOI: 10.3390/biology12091188] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/19/2023] [Accepted: 08/20/2023] [Indexed: 09/29/2023]
Abstract
The nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) inflammasome is a vital component of many inflammatory responses. Here, we intended to investigate the involvement of NLRP3 in lipopolysaccharide (LPS)-induced sepsis-associated acute kidney injury (S-AKI) and explore its mechanisms. For the first time, we validated elevated NLRP3 expression in the renal tissues of S-AKI patients by immunohistochemistry analysis. Through LPS injection in both wild-type and Nlrp3-/- mice, a S-AKI model was developed. It was found that LPS-induced kidney injury, including an abnormal morphology in a histological examination, abnormal renal function in a laboratory examination, and an increase in the expression of AKI biomarkers, was dramatically reversed in Nlrp3-deficient mice. Nlrp3 deletion alleviated renal inflammation, as evidenced by the suppression of the expression of pro-inflammatory cytokines and chemokines. A combinative analysis of RNA sequencing and the FerrDb V2 database showed that Nlrp3 knockout regulated multiple metabolism pathways and ferroptosis in LPS-induced S-AKI. Further qPCR coupled with Prussian blue staining demonstrated that Nlrp3 knockout inhibited murine renal ferroptosis, indicating a novel mechanism involving S-AKI pathogenesis by NLRP3. Altogether, the aforementioned findings suggest that Nlrp3 deficiency alleviates LPS-induced S-AKI by reducing renal inflammation and ferroptosis. Our data highlight that NLRP3 is a potential therapeutic target for S-AKI.
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Affiliation(s)
- Zhilan Li
- Department of Rheumatology and Immunology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Xuan Wang
- Department of General Medicine, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Yi Peng
- Department of Rheumatology and Immunology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Hongling Yin
- Department of Pathology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Shenyi Yu
- Department of Rheumatology and Immunology, Zhuzhou Hospital Affiliated to Xiangya School of Medicine, Central South University, Zhuzhou 412007, China
| | - Weiru Zhang
- Department of General Medicine, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Xin Ni
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
- International Collaborative Research Center for Medical Metabolomics, Xiangya Hospital, Central South University, Changsha 410008, China
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Chen J, Zheng QY, Wang LM, Luo J, Chen KH, He YN. Proteomics reveals defective peroxisomal fatty acid oxidation during the progression of acute kidney injury and repair. Heliyon 2023; 9:e18134. [PMID: 37539197 PMCID: PMC10395357 DOI: 10.1016/j.heliyon.2023.e18134] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 08/05/2023] Open
Abstract
Acute kidney injury (AKI) is characterized by a rapid decrease in renal function with high mortality and risk of progression to chronic kidney disease (CKD). Ischemia and reperfusion injury (IRI) is one of the major causes of AKI. However, the cellular and molecular responses of the kidney to IRI are complex and not fully understood. Herein, we conducted unbiased proteomics and bioinformatics analyses in an IRI mouse model on days 3, 7, and 21, and validated the results using IRI, unilateral ureteral obstruction (UUO), and biopsies from patients with AKI or CKD. The results indicated an obvious temporal expression profile of differentially expressed proteins and highlighted impaired lipid metabolism during the progression of AKI to CKD. Acyl-coenzyme A oxidase 1 (Acox1), the first rate-limiting enzyme of peroxisomal fatty acid beta-oxidation, was then selected, and its disturbed expression in the two murine models validated the proteomic findings. Accordingly, Acox1 expression was significantly downregulated in renal biopsies from patients with AKI or CKD, and its expression was negatively correlated with kidney injury score. Furthermore, in contrast to the decreased Acox1 expression, lipid droplet accumulation was remarkably increased in these renal tissues, suggesting dysregulation of fatty acid oxidation. In conclusion, our results suggest that defective peroxisomal fatty acid oxidation might be a common pathological feature in the transition from AKI to CKD, and that Acox1 is a promising intervention target for kidney injury and repair.
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Affiliation(s)
- Jia Chen
- Department of Nephrology, Daping Hospital, Army Medical University, Chongqing, 400042, China
| | - Quan-you Zheng
- Department of Nephrology and Urology, The 958th Hospital, The First Affiliated Hospital, Army Medical University, Chongqing, 400020, China
| | - Li-ming Wang
- Department of Nephrology, Daping Hospital, Army Medical University, Chongqing, 400042, China
| | - Jia Luo
- Department of Nephrology, Daping Hospital, Army Medical University, Chongqing, 400042, China
| | - Ke-hong Chen
- Department of Nephrology, Daping Hospital, Army Medical University, Chongqing, 400042, China
| | - Ya-ni He
- Department of Nephrology, Daping Hospital, Army Medical University, Chongqing, 400042, China
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