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Acosta-Martinez M, Cabail MZ. The PI3K/Akt Pathway in Meta-Inflammation. Int J Mol Sci 2022; 23:ijms232315330. [PMID: 36499659 PMCID: PMC9740745 DOI: 10.3390/ijms232315330] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/22/2022] [Accepted: 12/01/2022] [Indexed: 12/09/2022] Open
Abstract
Obesity is a global epidemic representing a serious public health burden as it is a major risk factor for the development of cardiovascular disease, stroke and all-cause mortality. Chronic low-grade systemic inflammation, also known as meta-inflammation, is thought to underly obesity's negative health consequences, which include insulin resistance and the development of type 2 diabetes. Meta-inflammation is characterized by the accumulation of immune cells in adipose tissue, a deregulation in the synthesis and release of adipokines and a pronounced increase in the production of proinflammatory factors. In this state, the infiltration of macrophages and their metabolic activation contributes to complex paracrine and autocrine signaling, which sustains a proinflammatory microenvironment. A key signaling pathway mediating the response of macrophages and adipocytes to a microenvironment of excessive nutrients is the phosphoinositide 3-kinase (PI3K)/Akt pathway. This multifaceted network not only transduces metabolic information but also regulates macrophages' intracellular changes, which are responsible for their phenotypic switch towards a more proinflammatory state. In the present review, we discuss how the crosstalk between macrophages and adipocytes contributes to meta-inflammation and provide an overview on the involvement of the PI3K/Akt signaling pathway, and how its impairment contributes to the development of insulin resistance.
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Affiliation(s)
- Maricedes Acosta-Martinez
- Department of Physiology and Biophysics, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY 11794, USA
| | - Maria Zulema Cabail
- Biological Science Department, State University of New York-College at Old Westbury, Old Westbury, NY 11568, USA
- Correspondence:
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Kępczyński Ł, Wcisło S, Korzeniewska-Dyl I, Połatyńska K, Gach A, Moczulski D. No evidence for change in expression of TBC1D1 and TBC1D4 genes in cultured human adipocytes stimulated by myokines and adipokines. Adipocyte 2021; 10:153-159. [PMID: 33769190 PMCID: PMC8007147 DOI: 10.1080/21623945.2021.1900497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
TBC1D1 and TBC1D4 proteins play analogous, but not identical role in governing insulin-signalling pathway. Little is known about changes in expression levels of TBC1D1 and TBC1D4 genes in mammals, including humans. Number of factors were studied, but data remain controversial. The aim of this study was to evaluate the effect of selected cytokines, adipokines and myokines with known or putative insulin sensitivity regulation activity (adiponectin, irisin, omentin, interleukin 6, leptin, resistin, and tumour necrosis factor) on TBC1D1 and TBC1D4 expression levels in cultured differentiated human adipocytes. No significant differences were found between the adipocytes treated with different stimuli and this effect was determined not dose dependent. It is reasonable to conclude that relative shortage of data showing no change in TBC1D1 and TBC1D4 from literature results from publication bias; therefore, our finding provides additional insight into the role of both genes.
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Affiliation(s)
- Łukasz Kępczyński
- Department of Genetics, Polish Mothers’ Memorial Institute Research Hospital, Łódź, Poland
- Department of Internal Medicine and Nephrodiabetology, Medical University of Łódź and Military Medical Academy Memorial Teaching Hospital of the Medical University of Łódź - Central Veteran Hospital, Łódź, Poland
| | - Szymon Wcisło
- Department of Thoracic, General and Oncological Surgery, Medical University of Łódź and Military Medical Academy Memorial Teaching Hospital of the Medical University of Łódź - Central Veteran Hospital, Łódź, Poland
| | - Irmina Korzeniewska-Dyl
- Department of Internal Medicine and Nephrodiabetology, Medical University of Łódź and Military Medical Academy Memorial Teaching Hospital of the Medical University of Łódź - Central Veteran Hospital, Łódź, Poland
| | - Katarzyna Połatyńska
- Department of Neurology, Polish Mothers’ Memorial Institute Research Hospital, Łódź, Poland
| | - Agnieszka Gach
- Department of Genetics, Polish Mothers’ Memorial Institute Research Hospital, Łódź, Poland
| | - Dariusz Moczulski
- Department of Internal Medicine and Nephrodiabetology, Medical University of Łódź and Military Medical Academy Memorial Teaching Hospital of the Medical University of Łódź - Central Veteran Hospital, Łódź, Poland
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Gao Z, Kong D, Cai W, Zhang J, Jia L. Characterization and anti-diabetic nephropathic ability of mycelium polysaccharides from Coprinus comatus. Carbohydr Polym 2021; 251:117081. [PMID: 33142624 DOI: 10.1016/j.carbpol.2020.117081] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 09/03/2020] [Accepted: 09/07/2020] [Indexed: 01/13/2023]
Abstract
It seems quite necessary for obtaining effective substances from natural products against the diabetic nephropathic (DN) with the presently clinical problems of accompanying side-effects and lowing life qualities. This work aimed to characterize the primary structure of Coprinus comatus mycelium polysaccharides (CMP) and investigate the abilities against DN in streptozotocin induced mice models. The results indicated that CMP could improve insulin resistance and energy metabolism, and significantly suppress dysfunction on kidney and relieve the renal oxidative stress and inflammation in DN mice. Besides, the western blot results suggested that CMP reversed renal injury by modulating the PTEN/PI3K/Akt and Wnt-1/β-catenin pathways. The structure analysis indicated the typical characterizations with the major monosaccharide-compositions of galactose, α-pyranose configuration and proper molecular weights of 495.8 kDa possibly contributed to the anti-diabetic nephropathic effects of CMP. The results suggested that polysaccharides form C. comatus could be used as functional foods/drugs on preventing diabetic nephropathy.
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Affiliation(s)
- Zheng Gao
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China
| | - Deyin Kong
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China
| | - Wenxin Cai
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China
| | - Jianjun Zhang
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China.
| | - Le Jia
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China.
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Methyl 3,4,5-trimethoxycinnamate suppresses inflammation in RAW264.7 macrophages and blocks macrophage-adipocyte interaction. Inflammopharmacology 2020; 28:1315-1326. [PMID: 32418005 PMCID: PMC7524821 DOI: 10.1007/s10787-020-00720-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 05/02/2020] [Indexed: 12/22/2022]
Abstract
Methyl 3,4,5-trimethoxycinnamate (MTC) is a bioactive natural phenylpropanoid. We evaluated anti-inflammatory effects of synthetic MTC in RAW264.7 macrophages and RAW264.7–3T3-L1 adipocytes co-culture. Levels of cytokines and chemokines, as well as NO and PGE2 in cell supernatants were analysed using ELISAs, Griess assay and enzyme immunoassays, respectively. In-cell cytoblot was used to assess levels of proteins; while DNA binding and reporter gene assays were used to measure transcription factor DNA binding and transcriptional activities, respectively. Glucose uptake in adipocytes was evaluated with 2‐deoxy‐2‐[(7‐nitro‐2, 1, 3‐benzoxadiazol‐4‐yl) amino]‐d‐glucose uptake. MTC (5–20 µM) suppressed LPS + IFNγ-induced release of TNFα, IL-6 and IL-1β, as well as NO/iNOS and PGE2/COX-2 levels in RAW264.7 cells. Furthermore, there was a reduction in phospho-IκB and phospho-p65 proteins, accompanied by a reduction in total IκB in RAW264.7 cells. Further studies showed that MTC also produced a reduction in NF-κB DNA binding and luciferase activity. Treatment of RAW264.7 cells with MTC (5–20 µM) resulted in enhanced DNA binding of Nrf2 and an increase in ARE-luciferase activity. In a macrophage–adipocyte co-culture, the compound reduced the release of TNFα, IL-6, IL-1β, MCP-1 and RANTES, while enhancing glucose uptake and activation of AMPKα. Our results suggest that MTC produced anti-inflammatory and antioxidant activities in macrophages. MTC also prevented inflammation in macrophage–adipocyte co-culture. The effect of MTC on glucose uptake in adipocytes is proposed to be linked to activation of AMPK.
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Kim J, Kim HJ, Lee M. The suppressive effect of Gelidium amansi- EtOH extracts on the adipogenesis with MAPK signals in adipocytes with or without macrophages. Food Sci Biotechnol 2018; 26:1715-1723. [PMID: 30263710 DOI: 10.1007/s10068-017-0230-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 07/20/2017] [Accepted: 07/20/2017] [Indexed: 12/13/2022] Open
Abstract
To elucidate the anti-inflammatory and anti-adipogenetic effects of Gelidium amansii (GA) ethanol extracts and their mechanisms, we performed two culture systems, adipocytes cultured with or without macrophages. Purified GA-3 fraction (GAE) contains high flavonoids and phenolics, reduced the mRNA levels of PPARγ and C/EBPα with GLUT4 expression in adipocyte with or without macrophages. GAE also increased the protein expression of HSL and ATGL enzymes, lipolysis biomarkers in fat cells. In co-culture system, GAE suppressed not only the transcription factors for adipogenesis, but also the production of pro-inflammatory cytokines, TNF-α. Compared to MAPK pathways such as JNK and p-38, the phosphorylation of both ERK1/2 (Thr202/Tyr204) was strongly suppressed by GAE with dose-dependent manner in both culture system. Otherwise, an increased JNK expression caused by GAE treatments blocked an insulin-induced GLUT4 translocation in adipocytes culture. In conclusion, GAE depressed the expression of adipogenetic genes, corresponding to a reduction in fat accumulation while preadipocytes developed into adipocytes with the modulation of MAPK pathways and inflammatory cytokines.
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Affiliation(s)
- Jeoungyeon Kim
- 1Research Institute of Obesity Sciences, Sungshin Women's University, Seoul, 01133 Republic of Korea
| | - Hack-Ju Kim
- Seojin Biotech Co. Ltd., Dongbaekjunang-ro, Giheung-Gu, Yongin-si, Gyeonggi-do 17015 Republic of Korea
| | - Myoungsook Lee
- 1Research Institute of Obesity Sciences, Sungshin Women's University, Seoul, 01133 Republic of Korea
- 3Department of Food and Nutrition and Research Institute of Obesity Science, Sungshin Women's University, Seoul, 01133 Republic of Korea
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Improvement of hyperglycemia in a murine model of insulin resistance and high glucose- and inflammasome-mediated IL-1β expressions in macrophages by silymarin. Chem Biol Interact 2018; 290:12-18. [DOI: 10.1016/j.cbi.2018.05.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 01/09/2018] [Accepted: 05/08/2018] [Indexed: 12/17/2022]
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Qi Z, Xia J, Xue X, Liu J, Liu W, Ding S. Targeting viperin improves diet-induced glucose intolerance but not adipose tissue inflammation. Oncotarget 2017; 8:101418-101436. [PMID: 29254175 PMCID: PMC5731885 DOI: 10.18632/oncotarget.20724] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 08/02/2017] [Indexed: 12/20/2022] Open
Abstract
Viperin is an interferon-inducible antiviral protein, responsible for antiviral response to a variety of viral infections. Here, we show that silencing viperin by antisense oligonucleotides (ASO) protects against diet-induced glucose intolerance, and yet exacerbates adipose tissue inflammation. In high-fat diet-fed mice, viperin ASO improves glucose homeostasis, reduces plasma triglyceride concentrations and ameliorates diet-induced hepatic steatosis. Peripheral delivery of viperin by adeno-associated virus elevates fasting plasma glucose and insulin concentrations and reduces insulin-stimulated glucose uptake in skeletal muscle. Viperin overexpression reduces epinephrine- stimulated lipolysis in white adipose tissue, whereas viperin ASO increases expression of lipolytic genes. Targeting viperin by antisense oligonucleotides promotes reciprocal regulation of hepatic and adipose lipogenesis by reducing hepatic lipid content and increasing triacylglycerol content in adipose tissue. These findings reveal viperin as an important target to improve glucose metabolism, and suggest that suppressing antiviral potential may improve the metabolic adaptability to high-fat diet.
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Affiliation(s)
- Zhengtang Qi
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Jie Xia
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Xiangli Xue
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Jiatong Liu
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Weina Liu
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Shuzhe Ding
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai 200241, China.,College of Physical Education and Health, East China Normal University, Shanghai 200241, China
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Zanotto TM, Quaresma PGF, Guadagnini D, Weissmann L, Santos AC, Vecina JF, Calisto K, Santos A, Prada PO, Saad MJA. Blocking iNOS and endoplasmic reticulum stress synergistically improves insulin resistance in mice. Mol Metab 2016; 6:206-218. [PMID: 28180062 PMCID: PMC5279911 DOI: 10.1016/j.molmet.2016.12.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 12/02/2016] [Accepted: 12/12/2016] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Recent data show that iNOS has an essential role in ER stress in obesity. However, whether iNOS is sufficient to account for obesity-induced ER stress and Unfolded Protein Response (UPR) has not yet been investigated. In the present study, we used iNOS knockout mice to investigate whether high-fat diet (HFD) can still induce residual ER stress-associated insulin resistance. METHODS For this purpose, we used the intraperitoneal glucose tolerance test (GTT), euglycemic-hyperinsulinemic clamp, western blotting and qPCR in liver, muscle, and adipose tissue of iNOS KO and control mice on HFD. RESULTS The results of the present study demonstrated that, in HFD fed mice, iNOS-induced alteration in insulin signaling is an essential mechanism of insulin resistance in muscle, suggesting that iNOS may represent an important target that could be blocked in order to improve insulin sensitivity in this tissue. However, in liver and adipose tissue, the insulin resistance induced by HFD was only partially dependent on iNOS, and, even in the presence of genetic or pharmacological blockade of iNOS, a clear ER stress associated with altered insulin signaling remained evident in these tissues. When this ER stress was blocked pharmacologically, insulin signaling was improved, and a complete recovery of glucose tolerance was achieved. CONCLUSIONS Taken together, these results reinforce the tissue-specific regulation of insulin signaling in obesity, with iNOS being sufficient to account for insulin resistance in muscle, but in liver and adipose tissue ER stress and insulin resistance can be induced by both iNOS-dependent and iNOS-independent mechanisms.
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Key Words
- AKT, Protein kinase B
- ATF6, activating transcription factor 6
- Blocking
- ER, endoplasmic reticulum
- Endoplasmic reticulum stress
- GAPDH, glyceraldehyde 3-phosphate dehydrogenase
- GTT, glucose tolerance test
- HFD, high-fat diet
- IKK, kappa α/β kinase
- IRE1, inositol requiring enzyme 1
- ITT, insulin tolerance test
- Improving
- Insulin resistance
- JNK, c-JunN-terminal kinase
- NO, nitric oxide
- PERK, protein kinase RNA-like ER kinase
- UPR, unfolded protein response
- iNOS
- iNOS, inducible nitric oxide synthase
- qPCR, real time PCR
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Affiliation(s)
- Tamires M Zanotto
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Paula G F Quaresma
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Dioze Guadagnini
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Lais Weissmann
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Andressa C Santos
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Juliana F Vecina
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Kelly Calisto
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Andrey Santos
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Patrícia O Prada
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; School of Applied Sciences, State University of Campinas (UNICAMP), Limeira, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Mario J A Saad
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil.
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Zhang Y, Shi L, Mei H, Zhang J, Zhu Y, Han X, Zhu D. Inflamed macrophage microvesicles induce insulin resistance in human adipocytes. Nutr Metab (Lond) 2015; 12:21. [PMID: 26064180 PMCID: PMC4462080 DOI: 10.1186/s12986-015-0016-3] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 05/27/2015] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Cytokines secreted by adipose tissue macrophages (ATMs) significantly alter adipocyte function, inducing inflammatory responses and decreasing insulin sensitivity. However, little relevant information is available regarding the role of microvesicles (MVs) derived from ATMs in macrophage-adipocyte crosstalk. METHODS MVs were generated by stimulation of M1 or M2 phenotype THP-1 macrophages and incubated with human primary mature adipocytes and differentiated adipocytes. Subsequently, insulin-stimulated phosphorylation of Akt (pAkt) and glucose uptake were determined. Glucose transporter 4 (GLUT4) translocation and nuclear translocation of nuclear factor (NF)-kappa B were also analyzed in treated adipocytes. RESULTS M1 macrophage-derived MVs (M1 MVs) significantly reduced protein abundance of insulin-induced Akt phosphorylation in human primary mature adipocytes and differentiated adipocytes, when compared with the same concentration of M2 macrophage-derived MVs (M2 MVs). In contrast to M2 MVs, which enhanced the insulin-induced glucose uptake measured by 2-NBDG, M1 MVs decreased this effect in treated adipocytes. M1 MVs treatment also brought about a significant increase in the nuclear translocation of nuclear factor (NF)-kappa B, coupled with a decrease in pAkt level and GLUT4 translocation compared with M2 MVs-treated adipocytes. These effects were reversed by BAY 11-7085, a NF- kappa B specific inhibitor. CONCLUSIONS MVs derived from proinflammatory (M1) macrophages may, at least in part, contribute to the pathogenesis of obesity-induced insulin resistance, reducing insulin signal transduction and decreasing glucose uptake in human adipocytes, through NF-kappa B activation. Therefore, these MVs may be potential therapy candidates for the management of type 2 diabetes mellitus.
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Affiliation(s)
- Yaqin Zhang
- The Affiliated Drum Tower Hospital of Nanjing Medical University, Nanjing, Jiangsu 21008 China.,Department of Biochemistry and Molecular Biology, Key Laboratory of Human Functional Genomics of Jiangsu Province, Nanjing Medical University, Nanjing, Jiangsu 210029 China
| | - Li Shi
- The Affiliated Drum Tower Hospital of Nanjing Medical University, Nanjing, Jiangsu 21008 China.,Department of Biochemistry and Molecular Biology, Key Laboratory of Human Functional Genomics of Jiangsu Province, Nanjing Medical University, Nanjing, Jiangsu 210029 China
| | - Hongliang Mei
- Department of Biochemistry and Molecular Biology, Key Laboratory of Human Functional Genomics of Jiangsu Province, Nanjing Medical University, Nanjing, Jiangsu 210029 China
| | - Jiexin Zhang
- Department of Laboratory Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029 China
| | - Yunxia Zhu
- Department of Biochemistry and Molecular Biology, Key Laboratory of Human Functional Genomics of Jiangsu Province, Nanjing Medical University, Nanjing, Jiangsu 210029 China
| | - Xiao Han
- Department of Biochemistry and Molecular Biology, Key Laboratory of Human Functional Genomics of Jiangsu Province, Nanjing Medical University, Nanjing, Jiangsu 210029 China
| | - Dalong Zhu
- The Affiliated Drum Tower Hospital of Nanjing Medical University, Nanjing, Jiangsu 21008 China
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