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Zhang W, Zhao E, Li Z, Liu W, Wang J, Hou W, Zhang N, Yu Y, Li X, You B. Hexokinase HK3-mediated O-GlcNAcylation of EP300: a key regulator of PD-L1 expression and immune evasion in ccRCC. Cell Death Dis 2024; 15:613. [PMID: 39179546 PMCID: PMC11343739 DOI: 10.1038/s41419-024-06921-1] [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: 02/01/2024] [Revised: 07/16/2024] [Accepted: 07/18/2024] [Indexed: 08/26/2024]
Abstract
Clear cell renal cell carcinoma (ccRCC) demonstrates enhanced glycolysis, critically contributing to tumor development. Programmed death-ligand 1 (PD-L1) aids tumor cells in evading T-cell-mediated immune surveillance. Yet, the specific mechanism by which glycolysis influences PD-L1 expression in ccRCC is not fully understood. Our research identified that the glycolysis-related gene (GRG) HK3 has a unique correlation with PD-L1 expression. HK3 has been identified as a key regulator of O-GlcNAcylation in ccRCC. O-GlcNAcylation exists on the serine 900 (Ser900) site of EP300 and can enhance its stability and oncogenic activity by preventing ubiquitination. Stably expressed EP300 works together with TFAP2A as a co-transcription factor to promote PD-L1 transcription and as an acetyltransferase to stabilize PD-L1 protein. Furthermore, ccRCC exhibits interactive dynamics with tumor-associated macrophages (TAMs). The uridine 5'-diphospho-N-acetylglucosamine (UDP-GlcNAc), which serves as a critical substrate for the O-GlcNAcylation process, facilitates TAMs polarization. In ccRCC cells, HK3 expression is influenced by IL-10 secreted by M2 TAMs. Our study elucidates that HK3-mediated O-GlcNAcylation of EP300 is involved in tumor immune evasion. This finding suggests potential strategies to enhance the efficacy of immune checkpoint blockade therapy.
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Affiliation(s)
- Wei Zhang
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
- Future Medical Laboratory, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Enyang Zhao
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Zhuolun Li
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
- Future Medical Laboratory, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Weiyang Liu
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
- Future Medical Laboratory, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jinpeng Wang
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
- Future Medical Laboratory, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wenbin Hou
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Nan Zhang
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yang Yu
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xuedong Li
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
| | - Bosen You
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
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Shi RR, He TQ, Lin MS, Xu J, Gu JH, Xu H. O-GlcNAcylation in ischemic diseases. Front Pharmacol 2024; 15:1377235. [PMID: 38783961 PMCID: PMC11113977 DOI: 10.3389/fphar.2024.1377235] [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: 01/27/2024] [Accepted: 04/15/2024] [Indexed: 05/25/2024] Open
Abstract
Protein glycosylation is an extensively studied field, with the most studied forms being oxygen or nitrogen-linked N-acetylglucosamine (O-GlcNAc or N-GlcNAc) glycosylation. Particular residues on proteins are targeted by O-GlcNAcylation, which is among the most intricate post-translational modifications. Significantly contributing to an organism's proteome, it influences numerous factors affecting protein stability, function, and subcellular localization. It also modifies the cellular function of target proteins that have crucial responsibilities in controlling pathways related to the central nervous system, cardiovascular homeostasis, and other organ functions. Under conditions of acute stress, changes in the levels of O-GlcNAcylation of these proteins may have a defensive function. Nevertheless, deviant O-GlcNAcylation nullifies this safeguard and stimulates the advancement of several ailments, the prognosis of which relies on the cellular milieu. Hence, this review provides a concise overview of the function and comprehension of O-GlcNAcylation in ischemia diseases, aiming to facilitate the discovery of new therapeutic targets for efficient treatment, particularly in patients with diabetes.
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Affiliation(s)
- Rui-Rui Shi
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity and Child Healthcare Hospital of Nantong University, Nantong, China
| | - Tian-Qi He
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity and Child Healthcare Hospital of Nantong University, Nantong, China
- Department of Pharmacy, Affiliated Maternity and Child Healthcare Hospital of Nantong University, Nantong, China
| | - Meng-Si Lin
- Prenatal Screening and Diagnosis Center, Affiliated Maternity and Child Healthcare Hospital of Nantong University, Nantong, China
| | - Jian Xu
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity and Child Healthcare Hospital of Nantong University, Nantong, China
- Department of Pharmacy, Affiliated Maternity and Child Healthcare Hospital of Nantong University, Nantong, China
| | - Jin-Hua Gu
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity and Child Healthcare Hospital of Nantong University, Nantong, China
- Department of Pharmacy, Affiliated Maternity and Child Healthcare Hospital of Nantong University, Nantong, China
| | - Hui Xu
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity and Child Healthcare Hospital of Nantong University, Nantong, China
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Tang JL, Zhao MC, Chen H, Zhao BE, Wang YY, Guo YC, Wang TT, Cheng X, Ruan HR, Zhang JT, Wang HB. Lactiplantibacillus plantarum GL001 alleviates jejunal oxidative damage induced by intestinal ischemia-reperfusion injury by influencing jejunal tissue metabolism through the improvement of jejunal microbial composition. Life Sci 2023; 334:122234. [PMID: 37931744 DOI: 10.1016/j.lfs.2023.122234] [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: 08/22/2023] [Revised: 10/23/2023] [Accepted: 10/30/2023] [Indexed: 11/08/2023]
Abstract
Intestinal ischemia-reperfusion (IIR) injury is associated with inflammation and oxidative stress, yet its precise mechanisms remain not fully understood. IIR injury is closely linked to the gut microbiota and its metabolites. The anti-inflammatory and antioxidant effects of Lactiplantibacillus plantarum are specific to IIR. In our study, we conducted a 30-day pre-treatment of SD rats with both a standard strain of Lactiplantibacillus plantarum and Lactiplantibacillus plantarum GL001. After a 7-day cessation of treatment, we induced an IIR injury model to investigate the mechanisms by which Lactiplantibacillus plantarum alleviates IIR damage. The results demonstrate that Lactiplantibacillus plantarum effectively mitigates the inflammatory and oxidative stress damage induced by IIR. Lactiplantibacillus plantarum GL001 can improve the gut microbiota by reducing the abundance of harmful bacteria and increasing the abundance of beneficial bacteria. In IIR intestinal tissue, the levels of secondary bile acids are elevated. The content of the bacterial metabolite Calcimycin increases. Annotations of metabolic pathways suggest that Lactiplantibacillus plantarum GL001 can alleviate IIR damage by modulating calcium-phosphorus homeostasis through the regulation of parathyroid hormone synthesis, secretion, and action. Microbiota-metabolite correlation analysis reveals a significant negative correlation between calcimycin and Lactonacillus and a significant positive correlation between calcimycin and Shigella. There is also a significant positive correlation between calcimycin and secondary bile acids. Lactiplantibacillus plantarum GL001 can alleviate oxidative damage induced by IIR through improvements in gut microbiota and intestinal tissue metabolism.
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Affiliation(s)
- Ji-Lang Tang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China
| | - Ming-Chao Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China
| | - Hong Chen
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China
| | - Bing-Er Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China
| | - Ying-Ying Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China
| | - Ying-Chao Guo
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China
| | - Tian-Tian Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China
| | - Xin Cheng
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China
| | - Hong-Ri Ruan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China
| | - Jian-Tao Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China
| | - Hong-Bin Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, China.
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Li X, Peng X, Zhou X, Li M, Chen G, Shi W, Yu H, Zhang C, Li Y, Feng Z, Li J, Liang S, He W, Gou X. Small extracellular vesicles delivering lncRNA WAC-AS1 aggravate renal allograft ischemia‒reperfusion injury by inducing ferroptosis propagation. Cell Death Differ 2023; 30:2167-2186. [PMID: 37532764 PMCID: PMC10482833 DOI: 10.1038/s41418-023-01198-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 07/11/2023] [Accepted: 07/20/2023] [Indexed: 08/04/2023] Open
Abstract
Ferroptosis is a predominant contributor to renal ischemia reperfusion injury (IRI) after kidney transplant, evoking delayed graft function and poorer long-term outcomes. The wide propagation of ferroptosis among cell populations in a wave-like manner, developing the "wave of ferroptosis" causes a larger area of tubular necrosis and accordingly aggravates renal allograft IRI. In this study, we decipher a whole new metabolic mechanism underlying ferroptosis and propose a novel spreading pathway of the "wave of ferroptosis" in the renal tissue microenvironment, in which renal IRI cell-secreted small extracellular vesicles (IRI-sEVs) delivering lncRNA WAC-AS1 reprogram glucose metabolism in adjacent renal tubular epithelial cell populations by inducing GFPT1 expression and increasing hexosamine biosynthesis pathway (HBP) flux, and consequently enhances O-GlcNAcylation. Additionally, BACH2 O-GlcNAcylation at threonine 389 in renal tubular epithelial cells prominently inhibits its degradation by ubiquitination and promotes importin α5-mediated nuclear translocation. We present the first evidence that intranuclear BACH2 suppresses SLC7A11 and GPX4 transcription by binding to their proximal promoters and decreases cellular anti-peroxidation capability, accordingly facilitating ferroptosis. Inhibition of sEV biogenesis and secretion by GW4869 and knockout of lncRNA WAC-AS1 in IRI-sEVs both unequivocally diminished the "wave of ferroptosis" propagation and protected against renal allograft IRI. The functional and mechanistic regulation of IRI-sEVs was further corroborated in an allograft kidney transplant model and an in situ renal IRI model. In summary, these findings suggest that inhibiting sEV-mediated lncRNA WAC-AS1 secretion and targeting HBP metabolism-induced BACH2 O-GlcNAcylation in renal tubular epithelial cells may serve as new strategies for protecting against graft IRI after kidney transplant.
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Affiliation(s)
- Xinyuan Li
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Xiang Peng
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Xiang Zhou
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Mao Li
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Guo Chen
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Wei Shi
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Haitao Yu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Chunlin Zhang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Yang Li
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Zhenwei Feng
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Molecular Oncology and Epigenetics, Chongqing, China
| | - Jie Li
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Simin Liang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Weiyang He
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
| | - Xin Gou
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
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Zhu J, Ji X, Shi R, He T, Chen SY, Cong R, He B, Liu S, Xu H, Gu JH. Hyperglycemia Aggravates the Cerebral Ischemia Injury via Protein O-GlcNAcylation. J Alzheimers Dis 2023:JAD230264. [PMID: 37334605 DOI: 10.3233/jad-230264] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
BACKGROUND At least one-third of Alzheimer's disease (AD) patients have cerebrovascular abnormalities, micro- and macro-infarctions, and ischemic white matter alterations. Stroke prognosis impacts AD development due to vascular disease. Hyperglycemia can readily produce vascular lesions and atherosclerosis, increasing the risk of cerebral ischemia. Our previous studies have proved that protein O-GlcNAcylation-a dynamic and reversible post-translational modification, protects against ischemic stroke. However, the role of O-GlcNAcylation in hyperglycemia aggravating cerebral ischemia injury remained unclear. OBJECTIVE In the present study, we investigated the role and mechanism of protein O-GlcNAcylation in hyperglycemia exacerbating cerebral ischemia injury. METHODS High glucose-cultured brain microvascular endothelial (bEnd3) cells were injured by oxygen-glucose deprivation. Cell viability was used as the assay result. Stroke outcomes and hemorrhagic transformation incidence were assessed in mice after middle cerebral artery occlusion under high glucose and streptozotocin-induced hyperglycemic conditions. Western blot estimated that O-GlcNAcylation influenced apoptosis levels in vitro and in vivo. RESULTS In in vitro analyses showed that Thiamet-G induces upregulation of protein O-GlcNAcylation, which attenuates oxygen-glucose deprivation/R-induce injury in bEnd3 cells cultured under normal glucose conditions, while aggravated it under high glucose conditions. In in vivo analyses, Thiamet-G exacerbated cerebral ischemic injury and induced hemorrhagic transformation, accompanied by increased apoptosis. While blocking protein O-GlcNAcylation with 6-diazo-5-oxo-L-norleucine alleviated cerebral injury of ischemic stroke in different hyperglycemic mice. CONCLUSION Overall, our study indicates a critical role for O-GlcNAcylation in that hyperglycemia aggravates cerebral ischemia injury. O-GlcNAcylation may be a potential therapeutic drug for ischemic stroke associated with AD.
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Affiliation(s)
- Jing Zhu
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Medical School of Nantong University, Nantong, China
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity & Child Healthcare Hospital of Nantong University, Nantong, China
| | - Xin Ji
- Department of Pharmacy, Affiliated Maternity & Child Healthcare Hospital of Nantong University, Medical School of Nantong University, Nantong, China
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity & Child Healthcare Hospital of Nantong University, Nantong, China
| | - Ruirui Shi
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity & Child Healthcare Hospital of Nantong University, Nantong, China
| | - Tianqi He
- Department of Pharmacy, Affiliated Maternity & Child Healthcare Hospital of Nantong University, Medical School of Nantong University, Nantong, China
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity & Child Healthcare Hospital of Nantong University, Nantong, China
| | - Su-Ying Chen
- Department of Radiology, Affiliated Hospital 2 of Nantong University, Nantong, Jiangsu, China
| | - Ruochen Cong
- Department of Radiology, Affiliated Hospital 2 of Nantong University, Nantong, Jiangsu, China
| | - Bosheng He
- Department of Radiology, Affiliated Hospital 2 of Nantong University, Nantong, Jiangsu, China
| | - Su Liu
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Medical School of Nantong University, Nantong, China
| | - Hui Xu
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity & Child Healthcare Hospital of Nantong University, Nantong, China
| | - Jin-Hua Gu
- Department of Pharmacy, Affiliated Maternity & Child Healthcare Hospital of Nantong University, Medical School of Nantong University, Nantong, China
- Nantong Institute of Genetics and Reproductive Medicine, Affiliated Maternity & Child Healthcare Hospital of Nantong University, Nantong, China
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Li J, Qiu Y, Zhang C, Wang H, Bi R, Wei Y, Li Y, Hu B. The role of protein glycosylation in the occurrence and outcome of acute ischemic stroke. Pharmacol Res 2023; 191:106726. [PMID: 36907285 DOI: 10.1016/j.phrs.2023.106726] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/03/2023] [Accepted: 03/09/2023] [Indexed: 03/12/2023]
Abstract
Acute ischemic stroke (AIS) is a serious and life-threatening disease worldwide. Despite thrombolysis or endovascular thrombectomy, a sizeable fraction of patients with AIS have adverse clinical outcomes. In addition, existing secondary prevention strategies with antiplatelet and anticoagulant drugs therapy are not able to adequately decrease the risk of ischemic stroke recurrence. Thus, exploring novel mechanisms for doing so represents an urgent need for the prevention and treatment of AIS. Recent studies have discovered that protein glycosylation plays a critical role in the occurrence and outcome of AIS. As a common co- and post-translational modification, protein glycosylation participates in a wide variety of physiological and pathological processes by regulating the activity and function of proteins or enzymes. Protein glycosylation is involved in two causes of cerebral emboli in ischemic stroke: atherosclerosis and atrial fibrillation. Following ischemic stroke, the level of brain protein glycosylation becomes dynamically regulated, which significantly affects stroke outcome through influencing inflammatory response, excitotoxicity, neuronal apoptosis, and blood-brain barrier disruption. Drugs targeting glycosylation in the occurrence and progression of stroke may represent a novel therapeutic idea. In this review, we focus on possible perspectives about how glycosylation affects the occurrence and outcome of AIS. We then propose the potential of glycosylation as a therapeutic drug target and prognostic marker for AIS patients in the future.
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Affiliation(s)
- Jianzhuang Li
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yanmei Qiu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chunlin Zhang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hailing Wang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rentang Bi
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yanhao Wei
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yanan Li
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Bo Hu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Ji J, Yang M, Jia J, Wu Q, Cong R, Cui H, Zhu B, Chu X. A novel variant in NBAS identified from an infant with fever-triggered recurrent acute liver failure disrupts the function of the gene. Hum Genome Var 2023; 10:13. [PMID: 37055399 PMCID: PMC10102179 DOI: 10.1038/s41439-023-00241-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 03/06/2023] [Accepted: 03/08/2023] [Indexed: 04/15/2023] Open
Abstract
Mutations in the neuroblastoma amplified sequence (NBAS) gene correlate with infantile acute liver failure (ALF). Herein, we identified a novel NBAS mutation in a female infant diagnosed with recurrent ALF. Whole-exome and Sanger sequencing revealed that the proband carried a compound heterozygous mutation (c.938_939delGC and c.1342 T > C in NBAS). NBAS c.938_939delGC was presumed to encode a truncated protein without normal function, whereas NBAS c.1342 T > C encoded NBAS harboring the conserved Cys448 residue mutated to Arg448 (p.C448R). The proportion of CD4 + T cells decreased in the patient's peripheral CD45 + cells, whereas that of CD8 + T cells increased. Moreover, upon transfecting the same amount of DNA expression vector (ectopic expression) encoding wild-type NBAS and p.C448R NBAS, the group transfected with the p.C448R NBAS-expressing vector expressed less NBAS mRNA and protein. Furthermore, ectopic expression of the same amount of p.C448R NBAS protein as the wild-type resulted in more intracellular reactive oxygen species and the induction of apoptosis and expression of marker proteins correlating with endoplasmic reticulum stress in more cultured cells. This study indicated that p.C448R NBAS has a function different from that of wild-type NBAS and that the p.C448R NBAS mutation potentially affects T-cell function and correlates with ALF.
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Affiliation(s)
- Juhua Ji
- Department of Pediatrics, The Second Affiliated Hospital of Nantong University, 226001, Nantong, Jiangsu, China
| | - Mingming Yang
- Department of Biochemistry and Molecular Biology, School of Medicine, Nantong University, 226001, Nantong, Jiangsu, China
| | - JunJun Jia
- Qinshen Traditional Chinese Medicine (TCM) Outpatient Department, 20052, Shanghai, China
| | - Qi Wu
- Department of Emergency, The Second Affiliated Hospital of Nantong University, 226001, Nantong, Jiangsu, China
| | - Ruochen Cong
- Department of Radiology, The Second Affiliated Hospital of Nantong University, 226001, Nantong, Jiangsu, China
| | - Hengxiang Cui
- Medical Research Center, The Second Affiliated Hospital of Nantong University, 226001, Nantong, Jiangsu, China.
| | - Baofeng Zhu
- Department of Emergency, The Second Affiliated Hospital of Nantong University, 226001, Nantong, Jiangsu, China.
| | - Xin Chu
- Department of Emergency, The Second Affiliated Hospital of Nantong University, 226001, Nantong, Jiangsu, China.
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8
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Wang Y, Zhang Z, Liu X, Chen N, Zhao Y, Wang C. Molecular dynamic simulations identifying the mechanism of holoenzyme formation by O-GlcNAc transferase and active p38α. Phys Chem Chem Phys 2023; 25:8090-8102. [PMID: 36876722 DOI: 10.1039/d2cp05968a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
O-N-Acetylglucosamine transferase (OGT) can catalyze the O-GlcNAc modification of thousands of proteins. The holoenzyme formation of OGT and adaptor protein is the precondition for further recognition and glycosylation of the target protein, while the corresponding mechanism is still open. Here, static and dynamic schemes based on statistics can successfully screen the feasible identifying, approaching, and binding mechanism of OGT and its typical adaptor protein p38α. The most favorable interface, energy contribution of hotspots, and conformational changes of fragments were discovered. The hydrogen bond interactions were verified as the main driving force for the whole process. The distinct characteristic of active and inactive p38α is explored and demonstrates that the phosphorylated tyrosine and threonine will form strong ion-pair interactions with Lys714, playing a key role in the dynamic identification stage. Multiple method combinations from different points of view may be helpful for exploring other systems of the protein-protein interactions.
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Affiliation(s)
- Yu Wang
- The Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, 475004, China.
| | - Zhiyang Zhang
- The Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, 475004, China.
| | - Xiaoyuan Liu
- The Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, 475004, China.
| | - Nianhang Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Yuan Zhao
- The Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, 475004, China.
| | - Chaojie Wang
- The Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, 475004, China.
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Deng Z. A relatively low glucose promotes the proliferation of vascular endothelial cells by suppressing VEGFR2 O-GlcNAcylation and its proteasome degradation. Int Ophthalmol 2022; 43:899-914. [PMID: 36089631 DOI: 10.1007/s10792-022-02492-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 08/20/2022] [Indexed: 10/14/2022]
Abstract
PURPOSE Vascular endothelial growth factor receptors (VEGFRs) have been demonstrated to play a critical role in ischemic retinal diseases, as VEGFRs mediate hypoxia-induced neovascularization. Not only hypoxia, ischemia also induces the deficiency of glucose, yet its effects on VEGFR signal and neovascularization have seldom been studied. Bioinformatics analysis predicted that VEGFRs may be regulated by O-GlcNAcylation, while glucose deficiency influences the O-GlcNAcylation. METHODS In this study, we treated human retinal microvascular endothelial cells with low glucose (LG) alone or in combination with low oxygen (oxygen and glucose deprivation, OGD). Cell viability and apoptosis rate were used to evaluate cell growth characters. RESULTS LG (2.8 mmol/L) treatment induced mRNA and protein levels of VEGFR1, 2, 3 even in the presence of the protein synthesis inhibitor, cycloheximide (CHX), suggesting that the increase in VEGFR proteins is partially associated with post-translational modifications. Immunoprecipitation analysis showed that O-GlcNAc level was decreased by LG in both VEGFR1, 2, but a de-O-GlcNAc glycosylase inhibitor restored the O-GlcNAc levels. This inhibitor also abolished the LG-induced increase in VEGFR2 protein, whereas this effect was not disappeared in the presence of the proteasome inhibitor, MG132. Similar results were also observed under OGD condition. VEGFR2 knockdown more significantly retarded the growth of hRMECs and HUVECs than VEGFR1, 3 knockdown under LG and OGD conditions. CONCLUSIONS A relatively low glucose suppressed O-GlcNAcylation in VEGFR2, whereby inhibiting its proteasome degradation; up-regulated VEGFR2 promoted the proliferation of vascular endothelial cells under ischemic condition.
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Ou W, Liang Y, Qin Y, Wu W, Xie M, Zhang Y, Zhang Y, Ji L, Yu H, Li T. Hypoxic acclimation improves cardiac redox homeostasis and protects heart against ischemia-reperfusion injury through upregulation of O-GlcNAcylation. Redox Biol 2021; 43:101994. [PMID: 33964586 PMCID: PMC8121980 DOI: 10.1016/j.redox.2021.101994] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/11/2021] [Accepted: 04/22/2021] [Indexed: 02/05/2023] Open
Abstract
Ischemia-reperfusion (I/R) injury is detrimental to cardiovascular system. Alteration in glucose metabolism has been recognized as an important adaptive response under hypoxic conditions. However, the biological benefits underlying this metabolic phenotype remain to be elucidated. This study was designed to investigate the impact of hypoxic acclimation (HA) on cardiac I/R injury and the antioxidative mechanism(s). Male adult mice were acclimated in a hypoxic chamber (10% oxygen [O2]) for 8 h/day for 14 days, and then subjected to cardiac I/R injury by ligation of left anterior descending coronary artery for 30 min and reperfusion for 24 h or 7 days. Our results showed that HA attenuated oxidative stress and reduced infarct size in the I/R hearts. This cardioprotective effect is coupled with an elevation of protein O-linked N-acetylglucosamine (O-GlcNAc) modification partially due to inflammatory stimulation. Hyperglycosylation activated glucose-6-phosphate dehydrogenase (G6PDH), the rate-limiting enzyme in the pentose phosphate pathway, resulting in an upregulation of NADPH/NADP+ and GSH/GSSG couples and enhancement of redox homeostasis in the heart. Pharmacological suppression of O-GlcNAcylation totally abolished the influence of HA on the G6PDH activity, redox balance and post-I/R damage in the hearts and cultured cardiomyocytes, whereby augmentation of O-GlcNAcylation further enhanced the benefits, suggesting a central role of O-GlcNAcylation in HA-initiated antioxidative and cardioprotective effects. These findings, therefore, identified HA as a promising anti-I/R strategy for the heart and proposed O-GlcNAc modification of G6PDH as a therapeutic target in ischemic heart disease.
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Affiliation(s)
- Wei Ou
- Laboratory of Mitochondria and Metabolism, Department of Anesthesiology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, 610041, China; Laboratory of Anesthesia and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, 610041, China; Department of Anesthesiology, Nanchong Central Hospital, Nanchong, 637000, China
| | - Yu Liang
- Laboratory of Mitochondria and Metabolism, Department of Anesthesiology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, 610041, China; Laboratory of Anesthesia and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Yu Qin
- Department of Anesthesiology, The General Hospital of Western Theater Command, Chengdu, 610083, China
| | - Wei Wu
- Department of Anesthesiology, The General Hospital of Western Theater Command, Chengdu, 610083, China
| | - Maodi Xie
- Laboratory of Mitochondria and Metabolism, Department of Anesthesiology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, 610041, China; Laboratory of Anesthesia and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Yabing Zhang
- Laboratory of Mitochondria and Metabolism, Department of Anesthesiology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, 610041, China; Laboratory of Anesthesia and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Yarong Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Liwei Ji
- Laboratory of Mitochondria and Metabolism, Department of Anesthesiology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, 610041, China; Laboratory of Anesthesia and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Haiyang Yu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Tao Li
- Laboratory of Mitochondria and Metabolism, Department of Anesthesiology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, 610041, China; Laboratory of Anesthesia and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, 610041, China.
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