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Liu S, Yang T, Jiang Q, Zhang L, Shi X, Liu X, Li X. Lactate and Lactylation in Sepsis: A Comprehensive Review. J Inflamm Res 2024; 17:4405-4417. [PMID: 39006496 PMCID: PMC11244620 DOI: 10.2147/jir.s459185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 05/02/2024] [Indexed: 07/16/2024] Open
Abstract
Sepsis is a disorder of the immune response to infection or infectious factors with high morbidity and mortality in clinical settings. The lactylation of lysine residues, fueled by lactate, plays a pivotal role in its pathophysiology. In conducting a literature review on sepsis-related research, we employed a systematic approach to ensure comprehensiveness and accuracy. Initially, we conducted an extensive literature search through the PubMed database, utilizing a range of keywords including "sepsis", "lactate", "lactylation", and "epigenetic modification". The aim was to capture the most recent research related to the pathophysiological mechanisms of sepsis, metabolic disorders, and the role of lactylation. The results of the literature review revealed a close link between sepsis and metabolic dysfunction, particularly the pivotal role of lactylation in regulating immune responses and inflammatory processes. Lactate, not only an energy metabolic byproduct produced during glycolysis, affects the activity of various proteins, including those involved in immune regulation and cell signaling, through lactylation. In the context of sepsis, changes in the levels of lactylation may be closely associated with the severity and prognosis of the disease. In summary, lactylation, as an emerging type of epigenetic modification, provides a new perspective for the diagnosis and treatment of sepsis. Future research needs to further elucidate the exact mechanisms of lactylation in sepsis and explore its potential as a therapeutic target.
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Affiliation(s)
- Sijia Liu
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, People’s Republic of China
- Key Laboratory for Biochemistry and Molecular Pharmacology of Chongqing, Chongqing, People’s Republic of China
| | - Ting Yang
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, People’s Republic of China
- Key Laboratory for Biochemistry and Molecular Pharmacology of Chongqing, Chongqing, People’s Republic of China
| | - Qingsong Jiang
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, People’s Republic of China
- Key Laboratory for Biochemistry and Molecular Pharmacology of Chongqing, Chongqing, People’s Republic of China
| | - Liang Zhang
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, People’s Republic of China
- Key Laboratory for Biochemistry and Molecular Pharmacology of Chongqing, Chongqing, People’s Republic of China
| | - Xinhui Shi
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, People’s Republic of China
- Key Laboratory for Biochemistry and Molecular Pharmacology of Chongqing, Chongqing, People’s Republic of China
| | - Xin Liu
- Medical Research Center, Southwest Hospital, Third Military Medical University, Chongqing, People’s Republic of China
| | - Xiaoli Li
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, People’s Republic of China
- Key Laboratory for Biochemistry and Molecular Pharmacology of Chongqing, Chongqing, People’s Republic of China
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Ni W, Zou Z, Jiang P, Wang S. Sevoflurane alleviates inflammation, apoptosis and permeability damage of human umbilical vein endothelial cells induced by lipopolysaccharide by inhibiting endoplasmic reticulum stress via upregulating RORα. Prostaglandins Other Lipid Mediat 2024; 172:106821. [PMID: 38373554 DOI: 10.1016/j.prostaglandins.2024.106821] [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: 12/07/2023] [Revised: 02/08/2024] [Accepted: 02/16/2024] [Indexed: 02/21/2024]
Abstract
Endothelial dysfunction often accompanies sepsis. Sevoflurane (Sev) is a widely used inhaled anesthetic that has a protective effect on sepsis-associated damage. We aimed to elucidate the role of Sev in endothelial dysfunction by using a model of LPS induced HUVECs. Sev increased the viability and decreased the apoptosis of HUVECs exposed to LPS. Inflammation and endothelial cell adhesion were improved after Sev addition. Besides, Sev alleviated LPS-induced endothelial cell permeability damage in HUVECs. RORα served as a potential protein that bound to Sev. Importantly, Sev upregulated RORα expression and inhibited endoplasmic reticulum (ER) stress in LPS-treated HUVECs. RORα silencing reversed the impacts of Sev on ER stress. Moreover, RORα deficiency or tunicamycin (ER stress inducer) treatment restored the effects of Sev on the viability, apoptosis, inflammation and endothelial permeability damage of HUVECs exposed to LPS. Taken together, Sev ameliorated LPS-induced endothelial cell damage by targeting RORα to inhibit ER stress.
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Affiliation(s)
- Weiwei Ni
- Department of Anesthesiology, Wujin Hospital Affiliated with Jiangsu University, Changzhou, Jiangsu 213000, China; Department of Anesthesiology, The Wujin Clinical College of Xuzhou Medical University, Changzhou, Jiangsu 213000, China
| | - Zhiwei Zou
- Department of Anesthesiology, Wujin Hospital Affiliated with Jiangsu University, Changzhou, Jiangsu 213000, China; Department of Anesthesiology, The Wujin Clinical College of Xuzhou Medical University, Changzhou, Jiangsu 213000, China
| | - Ping Jiang
- Department of Anesthesiology, Wujin Hospital Affiliated with Jiangsu University, Changzhou, Jiangsu 213000, China; Department of Anesthesiology, The Wujin Clinical College of Xuzhou Medical University, Changzhou, Jiangsu 213000, China
| | - Shuo Wang
- Department of Anesthesiology, Wujin Hospital Affiliated with Jiangsu University, Changzhou, Jiangsu 213000, China; Department of Anesthesiology, The Wujin Clinical College of Xuzhou Medical University, Changzhou, Jiangsu 213000, China.
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Chen WX, Zhang WL, Zhang HH, Lai YZ, Huang J, Lei Y, Liu YJ, Wang XL, Deng HF. UNVEILING THE PROTECTIVE MECHANISMS OF PUERARIN AGAINST ACUTE LUNG INJURY: A COMPREHENSIVE EXPLORATION OF THE ROLES AND MECHANISMS OF MST1/ERS SIGNALING. Shock 2024; 61:951-960. [PMID: 38598838 DOI: 10.1097/shk.0000000000002367] [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: 04/12/2024]
Abstract
ABSTRACT Objectives: Puerarin, the principal active constituent extracted from Pueraria, is believed to confer protection against sepsis-induced lung injury. The study aimed to elucidate the role and mechanism of Mst1/ERS in puerarin-mediated protection against acute lung injury (ALI). Methods: Monolayer vascular endothelial cell permeability was assessed by gauging the paracellular flow of FITC-dextran 40,000 (FD40). ELISA was employed for the quantification of inflammatory cytokines. Identification of target proteins was conducted through western blotting. Histological alterations and apoptosis were scrutinized using hematoxylin-eosin staining and TUNEL staining, respectively. The ultrastructure of the endoplasmic reticulum was observed via transmission electron microscopy. Results: Puerarin significantly protected mice from LPS-induced ALI, reducing lung interstitial width, neutrophil and lymphocyte infiltration, pulmonary interstitial and alveolar edema, and lung apoptosis. Puerarin treatment also markedly attenuated levels of TNF-α and IL-1β in both alveolar lavage fluid and serum. Furthermore, puerarin significantly attenuated LPS-induced increases in Mst1, GRP78, CHOP, and Caspase12 protein expression and blunted LPS-induced decrease in ZO-1 protein expression in lung tissues. Puerarin obviously reduced endoplasmic reticulum expansion and vesiculation. Similarly, puerarin significantly mitigated the LPS-induced reduction in HUVEC cell viability and ZO-1 expression. Puerarin also attenuated LPS-induced increase in apoptosis, TNF-α and IL-1β, FD40 flux, and Mst1, GRP78, CHOP, and Caspase12 expression in HUVEC cells. Nevertheless, the inhibitory impact of puerarin on vascular endothelial cell injury, lung injury, and endoplasmic reticulum stress (ERS) was diminished by Mst1 overexpression. Conclusion: These findings demonstrated that the Mst1/ERS signaling pathway played a pivotal role in the development of LPS-induced vascular endothelial cell dysfunction and ALI. Puerarin exhibited the ability to attenuate LPS-induced vascular endothelial cell dysfunction and ALI by inhibiting the Mst1/ERS signaling pathway.
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Affiliation(s)
- Wen-Xuan Chen
- School of Basic Medical Science, Xiangnan University, Chenzhou, Hunan, P. R. China
| | | | - Huan-Huan Zhang
- School of Basic Medical Science, Xiangnan University, Chenzhou, Hunan, P. R. China
| | - Yuan-Zhen Lai
- School of Basic Medical Science, Xiangnan University, Chenzhou, Hunan, P. R. China
| | - Jun Huang
- School of Basic Medical Science, Xiangnan University, Chenzhou, Hunan, P. R. China
| | - Yang Lei
- School of Basic Medical Science, Xiangnan University, Chenzhou, Hunan, P. R. China
| | - Yan-Juan Liu
- Institute of Emergency Medicine, Hunan Provincial People's Hospital (the First Affiliated Hospital of Hunan Normal University), Changsha, Hunan, P. R. China
| | - Xiao-Li Wang
- Medical College of Jishou University, Jishou, Hunan, P. R. China
| | - Hua-Fei Deng
- School of Basic Medical Science, Xiangnan University, Chenzhou, Hunan, P. R. China
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An S, Yao Y, Hu H, Wu J, Li J, Li L, Wu J, Sun M, Deng Z, Zhang Y, Gong S, Huang Q, Chen Z, Zeng Z. PDHA1 hyperacetylation-mediated lactate overproduction promotes sepsis-induced acute kidney injury via Fis1 lactylation. Cell Death Dis 2023; 14:457. [PMID: 37479690 PMCID: PMC10362039 DOI: 10.1038/s41419-023-05952-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 06/24/2023] [Accepted: 07/05/2023] [Indexed: 07/23/2023]
Abstract
The increase of lactate is an independent risk factor for patients with sepsis-induced acute kidney injury (SAKI). However, whether elevated lactate directly promotes SAKI and its mechanism remain unclear. Here we revealed that downregulation of the deacetylase Sirtuin 3 (SIRT3) mediated the hyperacetylation and inactivation of pyruvate dehydrogenase E1 component subunit alpha (PDHA1), resulting in lactate overproduction in renal tubular epithelial cells. We then found that the incidence of SAKI and renal replacement therapy (RRT) in septic patients with blood lactate ≥ 4 mmol/L was increased significantly, compared with those in septic patients with blood lactate < 2 mmol/L. Further in vitro and in vivo experiments showed that additional lactate administration could directly promote SAKI. Mechanistically, lactate mediated the lactylation of mitochondrial fission 1 protein (Fis1) lysine 20 (Fis1 K20la). The increase in Fis1 K20la promoted excessive mitochondrial fission and subsequently induced ATP depletion, mitochondrial reactive oxygen species (mtROS) overproduction, and mitochondrial apoptosis. In contrast, PDHA1 activation with sodium dichloroacetate (DCA) or SIRT3 overexpression decreased lactate levels and Fis1 K20la, thereby alleviating SAKI. In conclusion, our results show that PDHA1 hyperacetylation and inactivation enhance lactate overproduction, which mediates Fis1 lactylation and exacerbates SAKI. Reducing lactate levels and Fis1 lactylation attenuate SAKI.
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Affiliation(s)
- Sheng An
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Yi Yao
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Hongbin Hu
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Junjie Wu
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Jiaxin Li
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Lulan Li
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jie Wu
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Maomao Sun
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Zhiya Deng
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Yaoyuan Zhang
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Shenhai Gong
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Qiaobing Huang
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Zhongqing Chen
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China.
| | - Zhenhua Zeng
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
- Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China.
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Yang YH, Wen R, Yang N, Zhang TN, Liu CF. Roles of protein post-translational modifications in glucose and lipid metabolism: mechanisms and perspectives. Mol Med 2023; 29:93. [PMID: 37415097 DOI: 10.1186/s10020-023-00684-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 06/10/2023] [Indexed: 07/08/2023] Open
Abstract
The metabolism of glucose and lipids is essential for energy production in the body, and dysregulation of the metabolic pathways of these molecules is implicated in various acute and chronic diseases, such as type 2 diabetes, Alzheimer's disease, atherosclerosis (AS), obesity, tumor, and sepsis. Post-translational modifications (PTMs) of proteins, which involve the addition or removal of covalent functional groups, play a crucial role in regulating protein structure, localization function, and activity. Common PTMs include phosphorylation, acetylation, ubiquitination, methylation, and glycosylation. Emerging evidence indicates that PTMs are significant in modulating glucose and lipid metabolism by modifying key enzymes or proteins. In this review, we summarize the current understanding of the role and regulatory mechanisms of PTMs in glucose and lipid metabolism, with a focus on their involvement in disease progression associated with aberrant metabolism. Furthermore, we discuss the future prospects of PTMs, highlighting their potential for gaining deeper insights into glucose and lipid metabolism and related diseases.
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Affiliation(s)
- Yu-Hang Yang
- Department of Pediatrics, Shengjing Hospital of China Medical University, No.36, SanHao Street, Liaoning Province, Shenyang City, 110004, China
| | - Ri Wen
- Department of Pediatrics, Shengjing Hospital of China Medical University, No.36, SanHao Street, Liaoning Province, Shenyang City, 110004, China
| | - Ni Yang
- Department of Pediatrics, Shengjing Hospital of China Medical University, No.36, SanHao Street, Liaoning Province, Shenyang City, 110004, China
| | - Tie-Ning Zhang
- Department of Pediatrics, Shengjing Hospital of China Medical University, No.36, SanHao Street, Liaoning Province, Shenyang City, 110004, China.
| | - Chun-Feng Liu
- Department of Pediatrics, Shengjing Hospital of China Medical University, No.36, SanHao Street, Liaoning Province, Shenyang City, 110004, China.
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Liu W, Liu T, Zheng Y, Xia Z. Metabolic Reprogramming and Its Regulatory Mechanism in Sepsis-Mediated Inflammation. J Inflamm Res 2023; 16:1195-1207. [PMID: 36968575 PMCID: PMC10038208 DOI: 10.2147/jir.s403778] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 03/08/2023] [Indexed: 03/22/2023] Open
Abstract
Sepsis is a systemic inflammatory disease caused by an infection that can lead to multiple organ failure. Sepsis alters energy metabolism, leading to metabolic reprogramming of immune cells, which consequently disrupts innate and adaptive immune responses, triggering hyperinflammation and immunosuppression. This review summarizes metabolic reprogramming and its regulatory mechanism in sepsis-induced hyperinflammation and immunosuppression, highlights the significance and intricacies of immune cell metabolic reprogramming, and emphasizes the pivotal role of mitochondria in metabolic regulation and treatment of sepsis. This review provides an up-to-date overview of the relevant literature to inform future research directions in understanding the regulation of sepsis immunometabolism. Metabolic reprogramming has great promise as a new target for sepsis treatment in the future.
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Affiliation(s)
- Wenzhang Liu
- Department of Burn Surgery, Changhai Hospital, Naval Medical University, Shanghai, 200433, People’s Republic of China
| | - Tianyi Liu
- Department of Burn Surgery, Changhai Hospital, Naval Medical University, Shanghai, 200433, People’s Republic of China
| | - Yongjun Zheng
- Department of Burn Surgery, Changhai Hospital, Naval Medical University, Shanghai, 200433, People’s Republic of China
- Correspondence: Yongjun Zheng; Zhaofan Xia, Email ;
| | - Zhaofan Xia
- Department of Burn Surgery, Changhai Hospital, Naval Medical University, Shanghai, 200433, People’s Republic of China
- Research Unit of Key Techniques for Treatment of burns and Combined Burns and Trauma Injury, Chinese Academy of Medical Sciences, Shanghai, 200433, People’s Republic of China
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Wei JX, Jiang HL, Chen XH. Endothelial cell metabolism in sepsis. World J Emerg Med 2023; 14:10-16. [PMID: 36713343 PMCID: PMC9842459 DOI: 10.5847/wjem.j.1920-8642.2023.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 12/10/2022] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Endothelial dysfunction in sepsis is a pathophysiological feature of septic organ failure. Endothelial cells (ECs) exhibit specific metabolic traits and release metabolites to adapt to the septic state in the blood to maintain vascular homeostasis. METHODS Web of Science and PubMed were searched from inception to October 1, 2022. The search was limited to the English language only. Two reviewers independently identified studies related to EC metabolism in sepsis. The exclusion criteria were duplicate articles according to multiple search criteria. RESULTS Sixty articles were included, and most of them were cell and animal studies. These studies reported the role of glycolysis, oxidative phosphorylation, fatty acid metabolism, and amino acid metabolism in EC homeostasis. including glycolysis, oxidative phosphorylation, fatty acid metabolism and amino acid metabolism. However, dysregulation of EC metabolism can contribute to sepsis progression. CONCLUSION There are few clinical studies on EC metabolism in sepsis. Related research mainly focuses on basic research, but some scientific problems have also been clarified. Therefore, this review may provide an overall comprehension and novel aspects of EC metabolism in sepsis.
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Affiliation(s)
- Jue-xian Wei
- Emergency Department, the Second Affi liated Hospital, Guangzhou Medical University, Guangzhou 510260, China
| | - Hui-lin Jiang
- Emergency Department, the Second Affi liated Hospital, Guangzhou Medical University, Guangzhou 510260, China
| | - Xiao-hui Chen
- Emergency Department, the Second Affi liated Hospital, Guangzhou Medical University, Guangzhou 510260, China,Corresponding Author: Xiao-hui Chen,
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Dai Q, Zhang H, Tang S, Wu X, Wang J, Yi B, Liu J, Li Z, Liao Q, Li A, Liu Y, Zhang W. Vitamin D- VDR (vitamin D receptor) alleviates glucose metabolism reprogramming in lipopolysaccharide-induced acute kidney injury. Front Physiol 2023; 14:1083643. [PMID: 36909229 PMCID: PMC9998528 DOI: 10.3389/fphys.2023.1083643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 02/13/2023] [Indexed: 03/14/2023] Open
Abstract
Background: Our previous study showed that vitamin D (VD)-vitamin D receptor (VDR) plays a nephroprotective role in lipopolysaccharide (LPS)-induced acute kidney injury (AKI). Recently, glucose metabolism reprogramming was reported to be involved in the pathogenesis of AKI. Objective: To investigate the role of VD-VDR in glucose metabolism reprogramming in LPS-induced AKI. Methods: We established a model of LPS-induced AKI in VDR knockout (VDR-KO) mice, renal proximal tubular-specific VDR-overexpressing (VDR-OE) mice and wild-type C57BL/6 mice. In vitro, human proximal tubular epithelial cells (HK-2 cells), VDR knockout and VDR overexpression HK-2 cell lines were used. Results: Paricalcitol (an active vitamin D analog) or VDR-OE reduced lactate concentration, hexokinase activity and PDHA1 phosphorylation (a key step in inhibiting aerobic oxidation) and simultaneously ameliorated renal inflammation, apoptosis and kidney injury in LPS-induced AKI mice, which were more severe in VDR-KO mice. In in vitro experiments, glucose metabolism reprogramming, inflammation and apoptosis induced by LPS were alleviated by treatment with paricalcitol or dichloroacetate (DCA, an inhibitor of p-PDHA1). Moreover, paricalcitol activated the phosphorylation of AMP-activated protein kinase (AMPK), and an AMPK inhibitor partially abolished the protective effect of paricalcitol in LPS-treated HK-2 cells. Conclusion: VD-VDR alleviated LPS-induced metabolic reprogramming in the kidneys of AKI mice, which may be attributed to the inactivation of PDHA1 phosphorylation via the AMPK pathway.
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Affiliation(s)
- Qing Dai
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Hao Zhang
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Shiqi Tang
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Xueqin Wu
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Jianwen Wang
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Bin Yi
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Jishi Liu
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Zhi Li
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Qin Liao
- Department of Anesthesiology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Aimei Li
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Yan Liu
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Wei Zhang
- Department of Nephrology, Third Xiangya Hospital, Central South University, Changsha, China
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Freitag M, Schwertz H. A New Role of NAP1L1 in Megakaryocytes and Human Platelets. Int J Mol Sci 2022; 23:ijms232314694. [PMID: 36499021 PMCID: PMC9737020 DOI: 10.3390/ijms232314694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 11/26/2022] Open
Abstract
Platelets (PLTs) are anucleate and considered incapable of nuclear functions. Contrastingly, nuclear proteins were detected in human PLTs. For most of these proteins, it is unclear if nuclear or alternatively assigned functions are performed, a question we wanted to address for nuclear assembly protein 1like 1 (NAP1L1). Using a wide array of molecular methods, including RNAseq, co-IP, overexpression and functional assays, we explored expression pattern and functionality of NAP1L1 in PLTs, and CD34+-derived megakaryocytes (MKs). NAP1L1 is expressed in PLTs and MKs. Co-IP experiments revealed that dihydrolipolylysine-residue acetyltransferase (DLAT encoded protein PDC-E2, ODP2) dynamically interacts with NAP1L1. PDC-E2 is part of the mitochondrial pyruvate-dehydrogenase (PDH) multi-enzyme complex, playing a crucial role in maintaining cellular respiration, and promoting ATP-synthesis via the respiratory chain. Since altered mitochondrial function is a hallmark of infectious syndromes, we analyzed PDH activity in PLTs from septic patients demonstrating increased activity, paralleling NAP1L1 expression levels. MKs PDH activity decreased following an LPS-challenge. Furthermore, overexpression of NAP1L1 significantly altered the ability of MKs to form proplatelet extensions, diminishing thrombopoiesis. These results indicate that NAP1L1 performs in other than nucleosome-assembly functions in PTLs and MKs, binding a key mitochondrial protein as a potential chaperone, and gatekeeper, influencing PDH activity and thrombopoiesis.
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Affiliation(s)
- Martin Freitag
- Department of Cardiac Surgery, Heart Center Leipzig-University Hospital, 04289 Leipzig, Germany
| | - Hansjörg Schwertz
- Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA
- Division of Occupational Medicine, University of Utah, Salt Lake City, UT 84112, USA
- Occupational Medicine at Billings Clinic Bozeman, Bozeman, MT 59715, USA
- Correspondence: or
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