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Liu M, Zeng C, Zhang Y, Xin Y, Deng S, Hu X. Protective role of hydrogen sulfide against diabetic cardiomyopathy by inhibiting pyroptosis and myocardial fibrosis. Biomed Pharmacother 2024; 175:116613. [PMID: 38657502 DOI: 10.1016/j.biopha.2024.116613] [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: 02/12/2024] [Revised: 04/10/2024] [Accepted: 04/17/2024] [Indexed: 04/26/2024] Open
Abstract
Diabetic cardiomyopathy (DCM) contributes significantly to the heightened mortality rate observed among diabetic patients, with myocardial fibrosis (MF) being a pivotal element in the disease's progression. Hydrogen sulfide (H2S) has been shown to mitigate MF, but the specific underlying mechanisms have yet to be thoroughly understood. A connection has been established between the evolution of DCM and the incidence of cardiomyocyte pyroptosis. Our research offers insights into H2S protective impact and its probable mode of action against DCM, analyzed through the lens of MF. In this study, a diabetic rat model was developed using intraperitoneal injections of streptozotocin (STZ), and hyperglycemia-stimulated cardiomyocytes were employed to replicate the cellular environment of DCM. There was a marked decline in the expression of cystathionine γ-lyase (CSE), a catalyst for H2S synthesis, in both the STZ-induced diabetic rats and hyperglycemia-stimulated cardiomyocytes. Experimental results in vivo indicated that H2S ameliorates MF and enhances cardiac functionality in diabetic rats by mitigating cardiomyocyte pyroptosis. In vitro assessments highlighted the induction of cardiomyocyte pyroptosis and the subsequent decline in cell viability under hyperglycemic conditions. However, the administration of sodium hydrosulfide (NaHS) curtailed cardiomyocyte pyroptosis and augmented cell viability. In contrast, propargylglycine (PAG), a CSE inhibitor, reversed the effects rendered by NaHS administration. Additional exploration indicated that the mitigating effect of H2S on cardiomyocyte pyroptosis is modulated through the ROS/NLRP3 pathway. In essence, our findings corroborate the potential of H2S in alleviating MF in diabetic subjects. This therapeutic effect is likely attributable to the regulation of cardiomyocyte pyroptosis via the ROS/NLRP3 pathway. This discovery furnishes a prospective therapeutic target for the amelioration and management of MF associated with diabetes.
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Affiliation(s)
- Maojun Liu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital,Central South University, 139 Middle Renmin Road, Changsha, Hunan 410011,China
| | - Cheng Zeng
- Department of Cardiovascular Medicine, The Second Xiangya Hospital,Central South University, 139 Middle Renmin Road, Changsha, Hunan 410011,China
| | - Yifeng Zhang
- Department of Cardiovascular Medicine, The Second Xiangya Hospital,Central South University, 139 Middle Renmin Road, Changsha, Hunan 410011,China
| | - Ying Xin
- Department of Cardiovascular Medicine, The Second Xiangya Hospital,Central South University, 139 Middle Renmin Road, Changsha, Hunan 410011,China
| | - Simin Deng
- Department of Cardiovascular Medicine, The Second Xiangya Hospital,Central South University, 139 Middle Renmin Road, Changsha, Hunan 410011,China
| | - Xinqun Hu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital,Central South University, 139 Middle Renmin Road, Changsha, Hunan 410011,China.
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Chang X, Wang B, Zhao Y, Deng B, Liu P, Wang Y. The role of IFI16 in regulating PANoptosis and implication in heart diseases. Cell Death Discov 2024; 10:204. [PMID: 38693141 PMCID: PMC11063201 DOI: 10.1038/s41420-024-01978-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 04/16/2024] [Accepted: 04/18/2024] [Indexed: 05/03/2024] Open
Abstract
Interferon Gamma Inducible Protein 16 (IFI16) belongs to the HIN-200 protein family and is pivotal in immunological responses. Serving as a DNA sensor, IFI16 identifies viral and aberrant DNA, triggering immune and inflammatory responses. It is implicated in diverse cellular death mechanisms, such as pyroptosis, apoptosis, and necroptosis. Notably, these processes are integral to the emergent concept of PANoptosis, which encompasses cellular demise and inflammatory pathways. Current research implies a significant regulatory role for IFI16 in PANoptosis, particularly regarding cardiac pathologies. This review delves into the complex interplay between IFI16 and PANoptosis in heart diseases, including atherosclerosis, myocardial infarction, heart failure, and diabetic cardiomyopathy. It synthesizes evidence of IFI16's impact on PANoptosis, with the intention of providing novel insights for therapeutic strategies targeting heart diseases.
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Affiliation(s)
- Xindi Chang
- Department of Cardiology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, 725 South Wan-Ping Road, Shanghai, China
| | - Bei Wang
- Department of Emergency, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, 725 South Wan-Ping Road, Shanghai, China
| | - Yingli Zhao
- Department of Cardiology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, 725 South Wan-Ping Road, Shanghai, China
| | - Bing Deng
- Department of Cardiology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, 725 South Wan-Ping Road, Shanghai, China
| | - Ping Liu
- Department of Cardiology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, 725 South Wan-Ping Road, Shanghai, China.
| | - Yiru Wang
- Department of Cardiology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, 725 South Wan-Ping Road, Shanghai, China.
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Wang J, Yuan Y, Zhang S, Lu S, Han G, Bian M, huang L, Meng D, Su D, Xiao L, Xiao Y, Zhang J, Gong N, Jiang L. Remodeling of the Intra-Conduit Inflammatory Microenvironment to Improve Peripheral Nerve Regeneration with a Neuromechanical Matching Protein-Based Conduit. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2302988. [PMID: 38430538 PMCID: PMC11077661 DOI: 10.1002/advs.202302988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 12/22/2023] [Indexed: 03/04/2024]
Abstract
Peripheral nerve injury (PNI) remains a challenging area in regenerative medicine. Nerve guide conduit (NGC) transplantation is a common treatment for PNI, but the prognosis of NGC treatment is unsatisfactory due to 1) neuromechanical unmatching and 2) the intra-conduit inflammatory microenvironment (IME) resulting from Schwann cell pyroptosis and inflammatory-polarized macrophages. A neuromechanically matched NGC composed of regenerated silk fibroin (RSF) loaded with poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (P:P) and dimethyl fumarate (DMF) are designed, which exhibits a matched elastic modulus (25.1 ± 3.5 MPa) for the peripheral nerve and the highest 80% elongation at break, better than most protein-based conduits. Moreover, the NGC can gradually regulate the intra-conduit IME by releasing DMF and monitoring sciatic nerve movements via piezoresistive sensing. The combination of NGC and electrical stimulation modulates the IME to support PNI regeneration by synergistically inhibiting Schwann cell pyroptosis and reducing inflammatory factor release, shifting macrophage polarization from the inflammatory M1 phenotype to the tissue regenerative M2 phenotype and resulting in functional recovery of neurons. In a rat sciatic nerve crush model, NGC promoted remyelination and functional and structural regeneration. Generally, the DMF/RSF/P:P conduit provides a new potential therapeutic approach to promote nerve repair in future clinical treatments.
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Affiliation(s)
- Jia‐Yi Wang
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Ya Yuan
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
- Department of RehabilitationZhongshan HospitalFudan UniversityShanghai200032China
| | - Shu‐Yan Zhang
- The Key Laboratory for Ultrafine Materials of Ministry of Education, Engineering Research Centre for Biomedical Materials of Ministry of EducationFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China
| | - Shun‐Yi Lu
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Guan‐Jie Han
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Meng‐Xuan Bian
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Lei huang
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - De‐Hua Meng
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Di‐Han Su
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Lan Xiao
- School of MechanicalMedical and Process EngineeringCentre for Biomedical TechnologiesQueensland University of TechnologyBrisbane4059Australia
- Australia‐China Centre for Tissue Engineering and Regenerative MedicineQueensland University of TechnologyBrisbane4059Australia
| | - Yin Xiao
- School of MechanicalMedical and Process EngineeringCentre for Biomedical TechnologiesQueensland University of TechnologyBrisbane4059Australia
- Australia‐China Centre for Tissue Engineering and Regenerative MedicineQueensland University of TechnologyBrisbane4059Australia
- School of Medicine and Dentistry & Menzies Health Institute QueenslandGriffith UniversityGold Coast4222Australia
| | - Jian Zhang
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Ning‐Ji Gong
- Department of EmergencyDepartment of OrthopedicsThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandong250033China
| | - Li‐Bo Jiang
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
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Wang G, Ma TY, Huang K, Zhong JH, Lu SJ, Li JJ. Role of pyroptosis in diabetic cardiomyopathy: an updated review. Front Endocrinol (Lausanne) 2024; 14:1322907. [PMID: 38250736 PMCID: PMC10796545 DOI: 10.3389/fendo.2023.1322907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/06/2023] [Indexed: 01/23/2024] Open
Abstract
Diabetic cardiomyopathy (DCM), one of the common complications of diabetes, presents as a specific cardiomyopathy with anomalies in the structure and function of the heart. With the increasing prevalence of diabetes, DCM has a high morbidity and mortality worldwide. Recent studies have found that pyroptosis, as a programmed cell death accompanied by an inflammatory response, exacerbates the growth and genesis of DCM. These studies provide a theoretical basis for exploring the potential treatment of DCM. Therefore, this review aims to summarise the possible mechanisms by which pyroptosis promotes the development of DCM as well as the relevant studies targeting pyroptosis for the possible treatment of DCM, focusing on the molecular mechanisms of NLRP3 inflammasome-mediated pyroptosis, different cellular pyroptosis pathways associated with DCM, the effects of pyroptosis occurring in different cells on DCM, and the relevant drugs targeting NLRP3 inflammasome/pyroptosis for the treatment of DCM. This review might provide a fresh perspective and foundation for the development of therapeutic agents for DCM.
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Affiliation(s)
- Gan Wang
- Department of Cardiology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, Haikou, Hainan, China
| | - Tian-Yi Ma
- Department of Cardiology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, Haikou, Hainan, China
| | - Kang Huang
- Department of Cardiology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, Haikou, Hainan, China
| | - Jiang-Hua Zhong
- Department of Cardiology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, Haikou, Hainan, China
| | - Shi-Juan Lu
- Department of Cardiology, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, Haikou, Hainan, China
| | - Jian-Jun Li
- State Key Laboratory of Cardiovascular Diseases, Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Wei C, Shi M, Dong S, Li Z, Zhao B, Liu D, Li G, Cen J, Yu L, Liang X, Shi L. SIRT5-related lysine demalonylation of GSTP1 contributes to cardiomyocyte pyroptosis suppression in diabetic cardiomyopathy. Int J Biol Sci 2024; 20:585-605. [PMID: 38169591 PMCID: PMC10758093 DOI: 10.7150/ijbs.83306] [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: 02/07/2023] [Accepted: 11/27/2023] [Indexed: 01/05/2024] Open
Abstract
Sirtuin 5 (SIRT5), localized in the mitochondria, has been identified as a protein desuccinylase and demalonylase in the mitochondria since the depletion of SIRT5 boosted the global succinylation and malonylation of mitochondrial proteins. We investigated the role of SIRT5 in diabetic cardiomyopathy (DCM) and identified the mechanism regarding lysine demalonylation in this process. Wild-type and SIRT5 knockout mice were induced with DCM, and primary cardiomyocytes and cardiac fibroblasts extracted from wild-type and SIRT5 knockout mice were subjected to high glucose (HG). SIRT5 deficiency exacerbated myocardial injury in DCM mice, aggravated HG-induced oxidative stress and mitochondrial dysfunction in cardiomyocytes, and intensified cardiomyocyte senescence, pyroptosis, and DNA damage. DCM-induced SIRT5 loss diminished glutathione S-transferase P (GSTP1) protein stability, represented by significantly increased lysine malonylation (Mal-Lys) modification of GSTP1. SIRT5 overexpression alleviated DCM-related myocardial injury, which was reversed by GSTP1 knockdown. Reduced SIRT5 transcription in DCM resulted from the downregulation of SPI1. SPI1 promoted the transcription of SIRT5, thereby ameliorating DCM-associated myocardial injury. However, SIRT5 deletion resulted in a significant reversal of the protective effect of SPI1. These observations suggest that SPI1 activates SIRT5 transcriptionally to mediate GSTP1 Mal-Lys modification and protein stability, thus ameliorating DCM-associated myocardial injury.
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Affiliation(s)
- Can Wei
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, Heilongjiang, P.R. China
| | - Meixin Shi
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, Heilongjiang, P.R. China
| | - Shiyun Dong
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, Heilongjiang, P.R. China
| | - Zhitao Li
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, Heilongjiang, P.R. China
| | - Bingbing Zhao
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, Heilongjiang, P.R. China
| | - Dan Liu
- Department of Cadre ward, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, 150081, Heilongjiang, P.R. China
| | - Guopeng Li
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, Heilongjiang, P.R. China
| | - Jie Cen
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, Heilongjiang, P.R. China
| | - Ligen Yu
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, Heilongjiang, P.R. China
| | - Xiao Liang
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin, 150081, Heilongjiang, P.R. China
| | - Lili Shi
- Department of Cadre Ward, The First Affiliated Hospital of Harbin Medical University, Harbin, 150081, Heilongjiang, P.R. China
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Zhang Y. The essential role of glutamine metabolism in diabetic cardiomyopathy: A review. Medicine (Baltimore) 2023; 102:e36299. [PMID: 38013301 PMCID: PMC10681453 DOI: 10.1097/md.0000000000036299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 11/03/2023] [Indexed: 11/29/2023] Open
Abstract
Diabetic cardiomyopathy (DCM) is a pathophysiological condition caused by diabetes mellitus and is the leading cause of diabetes mellitus-related mortality. The pathophysiology of DCM involves various processes, such as oxidative stress, inflammation, ferroptosis, and abnormal protein modification. New evidence indicates that dysfunction of glutamine (Gln) metabolism contributes to the pathogenesis of DCM by regulating these pathophysiological mechanisms. Gln is a conditionally essential amino acid in the human body, playing a vital role in maintaining cell function. Although the precise molecular mechanisms of Gln in DCM have yet to be fully elucidated, recent studies have shown that supplementing with Gln improves cardiac function in diabetic hearts. However, excessive Gln may worsen myocardial injury in DCM by generating a large amount of glutamates or increasing O-GlcNacylation. To highlight the potential therapeutic method targeting Gln metabolism and its downstream pathophysiological mechanisms, this article aims to review the regulatory function of Gln in the pathophysiological mechanisms of DCM.
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Affiliation(s)
- Yiying Zhang
- Department of Cardiovascular Medicine, Wuxi No.2 People’s Hospital, Wuxi City, People’s Republic of China
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Wang LF, Li Q, Wen K, Zhao QH, Zhang YT, Zhao JL, Ding Q, Guan XH, Xiao YF, Deng KY, Xin HB. CD38 Deficiency Alleviates Diabetic Cardiomyopathy by Coordinately Inhibiting Pyroptosis and Apoptosis. Int J Mol Sci 2023; 24:16008. [PMID: 37958991 PMCID: PMC10650707 DOI: 10.3390/ijms242116008] [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: 09/11/2023] [Revised: 10/29/2023] [Accepted: 11/03/2023] [Indexed: 11/15/2023] Open
Abstract
Diabetic cardiomyopathy is one of the diabetes mellitus-induced cardiovascular complications that can result in heart failure in severe cases, which is characterized by cardiomyocyte apoptosis, local inflammation, oxidative stress, and myocardial fibrosis. CD38, a main hydrolase of NAD+ in mammals, plays an important role in various cardiovascular diseases, according to our previous studies. However, the role of CD38 in diabetes-induced cardiomyopathy is still unknown. Here, we report that global deletion of the CD38 gene significantly prevented diabetic cardiomyopathy induced by high-fat diet plus streptozotocin (STZ) injection in CD38 knockout (CD38-KO) mice. We observed that CD38 expression was up-regulated, whereas the expression of Sirt3 was down-regulated in the hearts of diabetic mice. CD38 deficiency significantly promoted glucose metabolism and improved cardiac functions, exemplified by increased left ventricular ejection fraction and fractional shortening. In addition, we observed that CD38 deficiency markedly decreased diabetes or high glucose and palmitic acid (HG + PA)-induced pyroptosis and apoptosis in CD38 knockout hearts or cardiomyocytes, respectively. Furthermore, we found that the expression levels of Sirt3, mainly located in mitochondria, and its target gene FOXO3a were increased in CD38-deficient hearts and cardiomyocytes with CD38 knockdown under diabetic induction conditions. In conclusion, we demonstrated that CD38 deficiency protected mice from diabetes-induced diabetic cardiomyopathy by reducing pyroptosis and apoptosis via activating NAD+/Sirt3/FOXO3a signaling pathways.
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Affiliation(s)
- Ling-Fang Wang
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang 330031, China; (Q.L.); (K.W.); (Q.-H.Z.); (Y.-T.Z.); (J.-L.Z.); (Q.D.); (X.-H.G.); (Y.-F.X.); (K.-Y.D.)
| | | | | | | | | | | | | | | | | | | | - Hong-Bo Xin
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang 330031, China; (Q.L.); (K.W.); (Q.-H.Z.); (Y.-T.Z.); (J.-L.Z.); (Q.D.); (X.-H.G.); (Y.-F.X.); (K.-Y.D.)
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Wei C, Xu J, Liu Y, Qadir J, Zhang S, Yuan H. Exogenous Spermidine Alleviates Diabetic Myocardial Fibrosis Via Suppressing Inflammation and Pyroptosis in db/db Mice. Balkan Med J 2023; 40:333-343. [PMID: 37350700 PMCID: PMC10500142 DOI: 10.4274/balkanmedj.galenos.2023.2023-3-102] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 06/01/2023] [Indexed: 06/24/2023] Open
Abstract
Background The main pathological feature of diabetic cardiomyopathy (DCM) caused by diabetes mellitus is myocardial fibrosis. According to recent studies in cardiology, it has been suggested that spermidine (SPD) has cardioprotective properties. Aims To explore the role and mechanism of SPD in alleviating myocardial fibrosis of DCM. Study Design In vivo and in vitro study. Methods Type 2 diabetic mice and primary neonatal mouse cardiac fibroblasts (CFs) were selected. Measurements of serum-related markers, echocardiographic analysis, and immunohistochemistry were used to evaluate myocardial fibrosis injury and the effects of SPD. The proliferation and migration of CFs undergoing different treatments were studied. Immunoblotting and real-time quantitative reverse transcription polymerase chain reaction were used to demonstrate molecular mechanisms. Results In vivo immunoblotting analysis indicated a downregulation of ornithine decarboxylase and an upregulation of SPD/spermine N1-acetyltransferase. We observed cardiac dysfunction in diabetic mice after 12 weeks. However, the administration of exogenous SPD improved cardiac function, decreased collagen deposition, and reduced myocardial tissue damage. mRNA expression levels of NLRP3, Caspase-1, GSDMD-N, interleukin (IL)-1β, IL-17A, and IL-18 were increased and suppressed in the myocardium of db/db mice upon treatment with SPD. SPD inhibited the proliferation, migration, and collagen secretion of high-glucose-treated fibroblasts in vitro. SPD inhibits the activation of the TGF-β1/Smad signaling pathway and decreases collagen deposition by reducing pyroptosis and Smad-7 ubiquitination levels. Conclusion Based on our findings, SPD may have potential applications in protecting against the deterioration of cardiac function in patients with DCM due to a significant new mechanism for diabetic myocardial fibrosis that we discovered.
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Affiliation(s)
- Can Wei
- School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, China
- Department of Pathophysiology, Harbin Medical University, Harbin, China
- These authors contributed equally
| | - Jiyu Xu
- School of Medical Imaging, Mudanjiang Medical University, Mudanjiang, China
- These authors contributed equally
| | - Yong Liu
- Animal Research Institute, Research Department, Mudanjiang Medical University, Mudanjiang, China
| | - Javeria Qadir
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Shumin Zhang
- School of Stomatology, Mudanjiang Medical University, Mudanjiang, China
| | - Hui Yuan
- School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, China
- School of Stomatology, Mudanjiang Medical University, Mudanjiang, China
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Li X, Su X, Xia F, Qiu J, Zhang J, Wu H, Xie X, Xu M. Bibliometric and visual analysis of diabetes mellitus and pyroptosis from 2011 to 2022. Eur J Med Res 2023; 28:235. [PMID: 37443131 DOI: 10.1186/s40001-023-01175-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 06/14/2023] [Indexed: 07/15/2023] Open
Abstract
OBJECTIVE To visualize and analyze the published literature on diabetes mellitus and pyroptosis based on a bibliometric approach, so as to provide a comprehensive picture of the hot research directions and dynamic progress in this field. METHODS This study was based on the web of science core collection database to conduct a comprehensive search of the published literature in the field of diabetes mellitus and Pyroptosis from January 1985 to August 2022, including the published research literature in this field, as well as a visual analysis of the number of citations, year of publication, journal, author, research institution, country, and research topic. RESULTS A total of 139 literature on research related to diabetes mellitus and cellular scorch from 2011 to 2022 were retrieved, with a total of 3009 citations and a maximum of 255 citations for a single article, which had a first author Schmid-Burgk, JL The first author of this article is from Germany; among 20 publishing countries, China leads with 100 articles; among 222 publishing institutions, Harbin Medical University leads with 18 articles and 184 citations; among 980 authors, Chen, X from China tops the list of high-impact authors with 5 articles and 29 citations. Among the 98 journals, "CELL DEATH DISEASE" ranked first in both volume and high-impact journals with 4 articles and 29 citations. Among 349 keywords, "pyroptosis" ranked first with a cumulative frequency of 65 times. The cluster analysis was divided into three categories, chronic complications of diabetes mellitus and pyroptosis (67 articles), diabetes mellitus and pyroptosis (60 articles), and diabetes mellitus combined with other diseases and pyroptosis (12 articles), and the number of articles related to diabetes mellitus and its chronic complications increased rapidly from 2019, among which, diabetic cardiomyopathy (27 articles) had the highest number of articles. CONCLUSIONS Based on a comprehensive analysis of published literature in the field of diabetes mellitus and pyroptosis from 2011 to 2022, this study achieved a visual analysis of studies with significant and outstanding contributions to the field, thus framing a picture showing the development and changes in the field. At the same time, this study provides research information and direction for clinicians and investigators to conduct diabetes mellitus and pyroptosis-related research in the future.
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Affiliation(s)
- Xiaodong Li
- The First Affiliated Hospital of Guizhou University of Chinese Medicine, Guiyang, 550000, China
- Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China
| | - Xiaojuan Su
- Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Fenglin Xia
- Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Jing Qiu
- Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Jiaqi Zhang
- Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Haiyan Wu
- Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Xuejun Xie
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China
| | - Mingchao Xu
- Traditional Chinese Medicine Hospital of Meishan, Meishan, 620010, China.
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10
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Yuan Q, Sun Y, Yang F, Yan D, Shen M, Jin Z, Zhan L, Liu G, Yang L, Zhou Q, Yu Z, Zhou X, Yu Y, Xu Y, Wu Q, Luo J, Hu X, Zhang C. CircRNA DICAR as a novel endogenous regulator for diabetic cardiomyopathy and diabetic pyroptosis of cardiomyocytes. Signal Transduct Target Ther 2023; 8:99. [PMID: 36882410 PMCID: PMC9992392 DOI: 10.1038/s41392-022-01306-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 10/29/2022] [Accepted: 12/18/2022] [Indexed: 03/09/2023] Open
Abstract
In this study, we identified that a conserved circular RNA (circRNA) DICAR, which was downregulated in diabetic mouse hearts. DICAR had an inhibitory effect on diabetic cardiomyopathy (DCM), as the spontaneous cardiac dysfunction, cardiac cell hypertrophy, and cardiac fibrosis occurred in DICAR deficiency (DICAR+/-) mice, whereas the DCM was alleviated in DICAR-overexpressed DICARTg mice. At the cellular level, we found that overexpression of DICAR inhibited, but knockdown of DICAR enhanced the diabetic cardiomyocyte pyroptosis. At the molecular level, we identified that DICAR-VCP-Med12 degradation could be the underlying molecular mechanism in DICAR-mediated effects. The synthesized DICAR junction part (DICAR-JP) exhibited a similar effect to the entire DICAR. In addition, the expression of DICAR in circulating blood cells and plasma from diabetic patients was lower than that from health controls, which was consistent with the decreased DICAR expression in diabetic hearts. DICAR and the synthesized DICAR-JP may be drug candidates for DCM.
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Affiliation(s)
- Qiong Yuan
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education, Institute of Cardiovascular Research and Institute of Metabolic Diseases, Southwest Medical University, Luzhou, 646000, China
| | - Yunwei Sun
- College of Medicine, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Fan Yang
- Department of Emergency and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Dan Yan
- College of Medicine, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Meihua Shen
- College of Medicine, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Zhigang Jin
- China Resource & WISCO General Hospital, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Lin Zhan
- College of Medicine, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Guangqi Liu
- College of Medicine, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Ling Yang
- College of Medicine, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Qianyi Zhou
- College of Medicine, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Zhijun Yu
- College of Medicine, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Xiangyu Zhou
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education, Institute of Cardiovascular Research and Institute of Metabolic Diseases, Southwest Medical University, Luzhou, 646000, China
| | - Yang Yu
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education, Institute of Cardiovascular Research and Institute of Metabolic Diseases, Southwest Medical University, Luzhou, 646000, China
| | - Yong Xu
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education, Institute of Cardiovascular Research and Institute of Metabolic Diseases, Southwest Medical University, Luzhou, 646000, China
| | - Qingming Wu
- College of Medicine, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Jianfang Luo
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong General Hospital, Guangzhou, China
| | - Xiamin Hu
- College of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, 210000, China.
| | - Chunxiang Zhang
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education, Institute of Cardiovascular Research and Institute of Metabolic Diseases, Southwest Medical University, Luzhou, 646000, China.
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11
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Wang J, Lu S, Yuan Y, Huang L, Bian M, Yu J, Zou J, Jiang L, Meng D, Zhang J. Inhibition of Schwann Cell Pyroptosis Promotes Nerve Regeneration in Peripheral Nerve Injury in Rats. Mediators Inflamm 2023; 2023:9721375. [PMID: 37144237 PMCID: PMC10154099 DOI: 10.1155/2023/9721375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 12/14/2022] [Accepted: 03/24/2023] [Indexed: 05/06/2023] Open
Abstract
Background Peripheral nerve injury (PNI) is one of the most debilitating injuries, but therapies for PNI are still far from satisfactory. Pyroptosis, a recently identified form of cell death, has been demonstrated to participate in different diseases. However, the role of pyroptosis of Schwann cells in PNI remains unclear. Methods We established a rat PNI model, and western blotting, transmission electron microscopy, and immunofluorescence staining were used to confirm pyroptosis of Schwann cells in PNI in vivo. In vitro, pyroptosis of Schwann cells was induced by lipopolysaccharides (LPS)+adenosine triphosphate disodium (ATP). An irreversible inhibitor of pyroptosis, acetyl (Ac)-Tyr-Val-Ala-Asp-chloromethyl ketone (Ac-YVAD-cmk), was used to attenuate Schwann cell pyroptosis. Moreover, the influence of pyroptotic Schwann cells on the function of dorsal root ganglion neurons (DRGns) was analyzed by a coculture system. Finally, the rat PNI model was intraperitoneally treated with Ac-YVAD-cmk to observe the effect of pyroptosis on nerve regeneration and motor function. Results Schwann cell pyroptosis was notably observed in the injured sciatic nerve. LPS+ATP treatment effectively induced Schwann cell pyroptosis, which was largely attenuated by Ac-YVAD-cmk. Additionally, pyroptotic Schwann cells inhibited the function of DRGns by secreting inflammatory factors. A decrease in pyroptosis in Schwann cells promoted regeneration of the sciatic nerve and recovery of motor function in rats. Conclusion Given the role of Schwann cell pyroptosis in PNI progression, inhibition of Schwann cell pyroptosis might be a potential therapeutic strategy for PNI in the future.
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Affiliation(s)
- Jiayi Wang
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Shunyi Lu
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ya Yuan
- Department of Rehabilitation, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lei Huang
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Mengxuan Bian
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jieqin Yu
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jiapeng Zou
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Libo Jiang
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Dehua Meng
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jian Zhang
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
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12
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Sun J, Xu J, Liu Y, Xu X, Zhang S, Hao Y, Lin Y, Han Y, Li F, Yuan H. Proteomic and metabolomic analyses reveal the novel targets of spermine for alleviating diabetic cardiomyopathy in type II diabetic mice. Front Cardiovasc Med 2022; 9:1022861. [PMID: 36312255 PMCID: PMC9614018 DOI: 10.3389/fcvm.2022.1022861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 09/23/2022] [Indexed: 11/13/2022] Open
Abstract
Diabetic cardiomyopathy (DCM) is one of the most serious complications of diabetes. Recent cardiology studies suggest that spermine has a cardioprotective effect. Here, we used proteomic and metabolomic analyses to reveal the underlying research targets in a type II diabetic (T2D) mouse model treated with spermine. Left ventricular tissues from nine mice (Control group, three; T2D group, three; T2D+SP group, three) were excised and analyzed. Quantitative analysis of the global proteome and metabolome was performed using the 4D label-free technique and untargeted metabolomics, respectively, and differentially expressed proteins (DEPs) and metabolites were used to perform bioinformatic analyses. A total of 169 DEPs were identified in T2D/Control group, including 115 upregulated and 54 downregulated proteins. Furthermore, 16 DEPs were identified in T2D+SP/T2D group, where these DEPs were found highly enriched in the cellular, metabolic processes, biological regulation, response to stimulus, and immune system process. The results of association analysis between proteomics and metabolomics showed that SP could affect the production of 51 metabolites by regulating the expression of 16 DEPs in the T2D+SP/T2D group. We also found that PRKG1 was closely related to the expressions of 10 overlapping metabolites between db/db and SP-treated mice. Our findings provide insights into the underlying mechanisms for DCM and suggest the potential applicability of utilizing spermine on protecting against DCM-associated cardiac function deterioration.
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Affiliation(s)
- Jian Sun
- School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, China
| | - Jiyu Xu
- School of Medical Imaging, Mudanjiang Medical University, Mudanjiang, China
| | - Yong Liu
- Research Department, Animal Research Institute, Mudanjiang Medical University, Mudanjiang, China
| | - Xiaoyi Xu
- The First Clinical School of Medicine, Mudanjiang Medical University, Mudanjiang, China
| | - Shumin Zhang
- School of Stomatology, Mudanjiang Medical University, Mudanjiang, China
| | - Yankun Hao
- School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, China
| | - Yitong Lin
- School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, China
| | - Yue Han
- School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, China
| | - Feiya Li
- Department of Laboratory Medicine and Pathobiology, Sunnybrook Research Institute, University of Toronto, Toronto, ON, Canada
| | - Hui Yuan
- School of Basic Medical Sciences, Mudanjiang Medical University, Mudanjiang, China,School of Stomatology, Mudanjiang Medical University, Mudanjiang, China,*Correspondence: Hui Yuan
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13
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Mengstie MA, Abebe EC, Teklemariam AB, Mulu AT, Teshome AA, Zewde EA, Muche ZT, Azezew MT. Molecular and cellular mechanisms in diabetic heart failure: Potential therapeutic targets. Front Endocrinol (Lausanne) 2022; 13:947294. [PMID: 36120460 PMCID: PMC9478122 DOI: 10.3389/fendo.2022.947294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/12/2022] [Indexed: 12/15/2022] Open
Abstract
Diabetes Mellitus (DM) is a worldwide health issue that can lead to a variety of complications. DM is a serious metabolic disorder that causes long-term microvascular and macro-vascular complications, as well as the failure of various organ systems. Diabetes-related cardiovascular diseases (CVD) including heart failure cause significant morbidity and mortality worldwide. Concurrent hypertensive heart disease and/or coronary artery disease have been thought to be the causes of diabetic heart failure in DM patients. However, heart failure is extremely common in DM patients even in the absence of other risk factors such as coronary artery disease and hypertension. The occurrence of diabetes-induced heart failure has recently received a lot of attention. Understanding how diabetes increases the risk of heart failure and how it mediates major cellular and molecular alteration will aid in the development of therapeutics to prevent these changes. Hence, this review aimed to summarize the current knowledge and most recent findings in cellular and molecular mechanisms of diabetes-induced heart failure.
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Affiliation(s)
- Misganaw Asmamaw Mengstie
- Department of Biochemistry, College of Medicine and Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Endeshaw Chekol Abebe
- Department of Biochemistry, College of Medicine and Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Awgichew Behaile Teklemariam
- Department of Biochemistry, College of Medicine and Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Anemut Tilahun Mulu
- Department of Biochemistry, College of Medicine and Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Assefa Agegnehu Teshome
- Department of Anatomy, College of Medicine and Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Edgeit Abebe Zewde
- Department of Physiology, College of Medicine and Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Zelalem Tilahun Muche
- Department of Physiology, College of Medicine and Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Muluken Teshome Azezew
- Department of Physiology, College of Medicine and Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
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14
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He Y, Wang S, Sun H, Li Y, Feng J. Naringenin ameliorates myocardial injury in STZ-induced diabetic mice by reducing oxidative stress, inflammation and apoptosis via regulating the Nrf2 and NF-κB signaling pathways. Front Cardiovasc Med 2022; 9:946766. [PMID: 36035932 PMCID: PMC9399499 DOI: 10.3389/fcvm.2022.946766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/08/2022] [Indexed: 11/13/2022] Open
Abstract
Diabetes-induced myocardial damage leads to diabetic cardiomyopathy and is closely associated with the generation of oxidative stress and inflammation. Naringenin (NG) exhibits antioxidant and anti-inflammatory effects. However, whether NG has cardioprotective effects against diabetic cardiomyopathy by regulating oxidative stress and inflammation remains unknown. This study investigated the effect of NG on diabetic cardiomyopathy based on an analysis of streptozotocin (STZ)-induced type 1 diabetic mice. The results indicated that NG reduced cardiac fibrosis and cardiomyocyte apoptosis in this diabetic model, accompanied by reduced blood glucose. NG inhibited pro-inflammatory cytokines, the level of reactive oxygen species and the expression of nuclear factor kappa-B (NF-κB), whereas the expression of antioxidant enzymes and nuclear factor erythroid 2-related factor 2 (Nrf2) were greatly enhanced by NG. Furthermore, in high glucose-treated H9C2 myocardial cells, NG effectively reduced cell apoptosis by inhibiting the formation of reactive oxygen species and pro-inflammatory cytokines. NG's antioxidant and anti-inflammatory activities were mechanistically associated with NF-κB inhibition and Nrf2 activation in animal and cell experiments. Data analysis showed that NG could regulate Nrf2 and NF-κB pathways to protect against diabetes-induced myocardial damage by reducing oxidative stress and inhibiting inflammation.
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Affiliation(s)
- Yongpeng He
- Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing University Cancer Hospital, Chongqing Cancer Institute, Chongqing, China
| | - Shuaiqi Wang
- Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing University Cancer Hospital, Chongqing Cancer Institute, Chongqing, China
| | - Hao Sun
- Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing University Cancer Hospital, Chongqing Cancer Institute, Chongqing, China
| | - Yan Li
- Department of Cardiology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jian Feng
- Department of Cardiology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
- *Correspondence: Jian Feng
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Zhang C, Liu N. Ferroptosis, necroptosis, and pyroptosis in the occurrence and development of ovarian cancer. Front Immunol 2022; 13:920059. [PMID: 35958626 PMCID: PMC9361070 DOI: 10.3389/fimmu.2022.920059] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/27/2022] [Indexed: 12/13/2022] Open
Abstract
Ovarian cancer (OC) is one of the most common malignancies that causes death in women and is a heterogeneous disease with complex molecular and genetic changes. Because of the relatively high recurrence rate of OC, it is crucial to understand the associated mechanisms of drug resistance and to discover potential target for rational targeted therapy. Cell death is a genetically determined process. Active and orderly cell death is prevalent during the development of living organisms and plays a critical role in regulating life homeostasis. Ferroptosis, a novel type of cell death discovered in recent years, is distinct from apoptosis and necrosis and is mainly caused by the imbalance between the production and degradation of intracellular lipid reactive oxygen species triggered by increased iron content. Necroptosis is a regulated non-cysteine protease–dependent programmed cell necrosis, morphologically exhibiting the same features as necrosis and occurring via a unique mechanism of programmed cell death different from the apoptotic signaling pathway. Pyroptosis is a form of programmed cell death that is characterized by the formation of membrane pores and subsequent cell lysis as well as release of pro-inflammatory cell contents mediated by the abscisin family. Studies have shown that ferroptosis, necroptosis, and pyroptosis are involved in the development and progression of a variety of diseases, including tumors. In this review, we summarized the recent advances in ferroptosis, necroptosis, and pyroptosis in the occurrence, development, and therapeutic potential of OC.
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Recurrent Hypoglycemia Impaired Vascular Function in Advanced T2DM Rats by Inducing Pyroptosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:7812407. [PMID: 35915611 PMCID: PMC9338872 DOI: 10.1155/2022/7812407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/14/2022] [Accepted: 06/23/2022] [Indexed: 11/18/2022]
Abstract
Background Hypoglycemia is a dangerous side effect of intensive glucose control in diabetes. Even though it leads to adverse cardiovascular events, the effects of hypoglycemia on vascular biology in diabetes have not been adequately studied. Methods Aged Sprague-Dawley rats were fed a high-fat diet and given streptozotocin to induce type 2 diabetes mellitus (T2DM). Acute and recurrent hypoglycemia were then induced by glucose via insulin administration. Vascular function, oxidative stress, and pyroptosis levels in aortic tissue were assessed by physiological and biochemical methods. Results Hypoglycemia was associated with a marked decrease in vascular function, elevated oxidative stress, and elevated pyroptosis levels in the thoracic aorta. The changes in oxidative stress and pyroptosis were greater in rats with recurrent hypoglycemia than in those with acute hypoglycemia. Conclusions Hypoglycemia impaired vascular function in aged rats with T2DM by inducing pyroptosis. The extent of injury increased with the duration of blood glucose fluctuation.
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