1
|
Gu W, Wu G, Chen G, Meng X, Xie Z, Cai S. Polyphenols alleviate metabolic disorders: the role of ubiquitin-proteasome system. Front Nutr 2024; 11:1445080. [PMID: 39188976 PMCID: PMC11345163 DOI: 10.3389/fnut.2024.1445080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Accepted: 07/04/2024] [Indexed: 08/28/2024] Open
Abstract
Metabolic disorders include obesity, nonalcoholic fatty liver disease, insulin resistance and type 2 diabetes. It has become a major health issue around the world. Ubiquitin-proteasome system (UPS) is essential for nearly all cellular processes, functions as a primary pathway for intracellular protein degradation. Recent researches indicated that dysfunctions in the UPS may result in the accumulation of toxic proteins, lipotoxicity, oxidative stress, inflammation, and insulin resistance, all of which contribute to the development and progression of metabolic disorders. An increasing body of evidence indicates that specific dietary polyphenols ameliorate metabolic disorders by preventing lipid synthesis and transport, excessive inflammation, hyperglycemia and insulin resistance, and oxidative stress, through regulation of the UPS. This review summarized the latest research progress of natural polyphenols improving metabolic disorders by regulating lipid accumulation, inflammation, oxidative stress, and insulin resistance through the UPS. In addition, the possible mechanisms of UPS-mediated prevention of metabolic disorders are comprehensively proposed. We aim to provide new angle to the development and utilization of polyphenols in improving metabolic disorders.
Collapse
Affiliation(s)
- Wei Gu
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, Hefei, Anhui, China
| | - Guohuo Wu
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, Hefei, Anhui, China
| | - Guijie Chen
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, Hefei, Anhui, China
| | - Xianghui Meng
- The First Affiliated Hospital of University of Science and Technology of China, Hefei, Anhui, China
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, Hefei, Anhui, China
| | - Shanbao Cai
- The First Affiliated Hospital of University of Science and Technology of China, Hefei, Anhui, China
| |
Collapse
|
2
|
Zambrano C, Garitaonaindia MT, Salmerón D, Pérez-Sanz F, Tchio C, Picinato MC, de Medina FS, Luján J, Scheer FAJL, Saxena R, Martínez-Augustin O, Garaulet M. Melatonin decreases human adipose tissue insulin sensitivity. J Pineal Res 2024; 76:e12965. [PMID: 38860494 DOI: 10.1111/jpi.12965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 05/07/2024] [Accepted: 05/13/2024] [Indexed: 06/12/2024]
Abstract
Melatonin is a pineal hormone that modulates the circadian system and exerts soporific and phase-shifting effects. It is also involved in many other physiological processes, such as those implicated in cardiovascular, endocrine, immune, and metabolic functions. However, the role of melatonin in glucose metabolism remains contradictory, and its action on human adipose tissue (AT) explants has not been demonstrated. We aimed to assess whether melatonin (a pharmacological dose) influences insulin sensitivity in human AT. This will help better understand melatonin administration's effect on glucose metabolism. Abdominal AT (subcutaneous and visceral) biopsies were obtained from 19 participants with severe obesity (age: 42.84 ± 12.48 years; body mass index: 43.14 ± 8.26 kg/m2) who underwent a laparoscopic gastric bypass. AT biopsies were exposed to four different treatments: control (C), insulin alone (I) (10 nM), melatonin alone (M) (5000 pg/mL), and insulin plus melatonin combined (I + M). All four conditions were repeated in both subcutaneous and visceral AT, and all were performed in the morning at 8 a.m. (n = 19) and the evening at 8 p.m. (in a subsample of n = 12). We used western blot analysis to determine insulin signaling (using the pAKT/tAKT ratio). Furthermore, RNAseq analyses were performed to better understand the metabolic pathways involved in the effect of melatonin on insulin signaling. As expected, insulin treatment (I) increased the pAKT/tAKT ratio compared with control (p < .0001). Furthermore, the addition of melatonin (I + M) resulted in a decrease in insulin signaling as compared with insulin alone (I); this effect was significant only during the evening time (not in the morning time). Further, RNAseq analyses in visceral AT during the evening condition (at 8 p.m.) showed that melatonin resulted in a prompt transcriptome response (around 1 h after melatonin addition), particularly by downregulating the insulin signaling pathway. Our results show that melatonin reduces insulin sensitivity in human AT during the evening. These results may partly explain the previous studies showing a decrease in glucose tolerance after oral melatonin administration in the evening or when eating late when endogenous melatonin is present.
Collapse
Affiliation(s)
- Carolina Zambrano
- Department of Physiology, Regional Campus of International Excellence, University of Murcia, Murcia, Spain
- Research Biomedical Institute of Murcia (IMIB)-Arrixaca, Murcia, Spain
| | - Mireia Tena Garitaonaindia
- Department of Biochemistry and Molecular Biology II, Centro de Investigación Biomédica en Red en Enfermedades Hepáticas y Digestivas (CIBERehd), Ibs Granada, Instituto de Nutrición y Tecnología de los Alimentos (INYTA) José Mataix, University of Granada, Granada, Spain
| | - Diego Salmerón
- Research Biomedical Institute of Murcia (IMIB)-Arrixaca, Murcia, Spain
- Health and Social Sciences Department, University of Murcia, Murcia, Spain
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | | | - Cynthia Tchio
- Center for Genomic Medicine, Massachusetts General Hospital, Cambridge, Massachusetts, USA
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
- Department of Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Cardiovascular Research Institute, Morehouse School of Medicine, Atlanta, Georgia, USA
| | | | - Fermín Sánchez de Medina
- Department of Pharmacology, Centro de Investigación Biomédica en Red en Enfermedades Hepáticas y Digestivas (CIBERehd), Ibs Granada, Universidad de Granada, Granada, Spain
| | - Juan Luján
- General Surgery Service, Hospital Quirónsalud Murcia, Murcia, Spain
| | - Frank A J L Scheer
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts, USA
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, Massachusetts, USA
- Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Richa Saxena
- Center for Genomic Medicine, Massachusetts General Hospital, Cambridge, Massachusetts, USA
| | - Olga Martínez-Augustin
- Department of Biochemistry and Molecular Biology II, Centro de Investigación Biomédica en Red en Enfermedades Hepáticas y Digestivas (CIBERehd), Ibs Granada, Instituto de Nutrición y Tecnología de los Alimentos (INYTA) José Mataix, University of Granada, Granada, Spain
| | - Marta Garaulet
- Department of Physiology, Regional Campus of International Excellence, University of Murcia, Murcia, Spain
- Research Biomedical Institute of Murcia (IMIB)-Arrixaca, Murcia, Spain
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| |
Collapse
|
3
|
Zhou L, Yang J, Zhang K, Wang T, Jiang S, Zhang X. Rising Star in Immunotherapy: Development and Therapeutic Potential of Small-Molecule Inhibitors Targeting Casitas B Cell Lymphoma-b (Cbl-b). J Med Chem 2024; 67:816-837. [PMID: 38181380 DOI: 10.1021/acs.jmedchem.3c01361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2024]
Abstract
Casitas B cell lymphoma-b (Cbl-b) is a vital negative regulator of TCR and BCR signaling pathways, playing a significant role in setting an appropriate threshold for the activation of T cells and controlling the tolerance of peripheral T cells via a variety of mechanisms. Overexpression of Cbl-b leads to immune hyporesponsiveness of T cells. Conversely, the deficiency of Cbl-b in T cells results in markedly increased production of IL-2, even in the lack of CD28 costimulation in vitro. And Cbl-b-/- mice spontaneously reject multifarious cancers. Therefore, Cbl-b may be associated with immune-mediated diseases, and blocking Cbl-b could be considered as a new antitumor immunotherapy strategy. In this review, the possible regulatory mechanisms and biological potential of Cbl-b for antitumor immunotherapy are summarized. Besides, the potential roles of Cbl-b in immune-mediated diseases are comprehensively discussed, with emphasis on Cbl-b immune-oncology agents in the preclinical stage and clinical trials.
Collapse
Affiliation(s)
- Lixin Zhou
- Department of Medicinal Chemistry, School of Pharmacy and School of Engineering, China Pharmaceutical University, Nanjing 210009, China
| | - Jiamei Yang
- Department of Medicinal Chemistry, School of Pharmacy and School of Engineering, China Pharmaceutical University, Nanjing 210009, China
| | - Kuojun Zhang
- Department of Medicinal Chemistry, School of Pharmacy and School of Engineering, China Pharmaceutical University, Nanjing 210009, China
| | - Tianyu Wang
- Department of Medicinal Chemistry, School of Pharmacy and School of Engineering, China Pharmaceutical University, Nanjing 210009, China
| | - Sheng Jiang
- Department of Medicinal Chemistry, School of Pharmacy and School of Engineering, China Pharmaceutical University, Nanjing 210009, China
| | - Xiangyu Zhang
- Department of Medicinal Chemistry, School of Pharmacy and School of Engineering, China Pharmaceutical University, Nanjing 210009, China
| |
Collapse
|
4
|
Mechanism of Yangxinshi Intervention on Cardiac Fibrosis in Diabetic Cardiomyopathy Based on Network Pharmacology. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:3968494. [PMID: 35096111 PMCID: PMC8799326 DOI: 10.1155/2022/3968494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 12/14/2021] [Accepted: 12/31/2021] [Indexed: 11/17/2022]
Abstract
Background Cardiac fibrosis (CF) is major myocardial change in diabetic cardiomyopathy (DCM). Yangxinshi as a Chinese medicine formula is used to treat cardiovascular diseases. However, the exact effective mechanism of Yangxinshi on CF is still uncertain. Hence, based on the pharmacological network, predicting the active components, potential targets and pathways of Yangxinshi on diabetic fibrosis require to be further studied. Materials and Methods By using Cytoscape 3.6.0 Bisogenet plug-in, the active components of Yangxinshi were obtained and screened through TCMSP, and the PPI network of DCM-CF was constructed and then screened by CytoNCA plug-in. GO analysis and KEGG pathway enrichment analysis were carried out by Cluego plug-in. Combined with the results of network pharmacological analysis, cells in vitro were performed to verify the CF stimulated with high glucose or intervence with Yangxinshi, and the expressions of Cbl-b, p-smad2, and α-SMA were detected. Results Yangxinshi might play a key role in reversing cardiac fibrosis in individuals with DCM by regulating the signal pathway of CBL and promoted the expression of Cbl-b and inhibited the expression of p-smad2 and α-SMA, verifying some predictive work via network pharmacology. Conclusion Based on network pharmacology, this study demonstrates that the beneficial effect of Yangxinshi on CF is related to the Cbl-b/smad2 pathway, providing an idea for the therapeutic effect of Yangxinshi on cardiac fibrosis in DCM.
Collapse
|
5
|
Chen YM, Zhu Q, Cai J, Zhao ZJ, Yao BB, Zhou LM, Ji LD, Xu J. Upregulation of T Cell Receptor Signaling Pathway Components in Gestational Diabetes Mellitus Patients: Joint Analysis of mRNA and circRNA Expression Profiles. Front Endocrinol (Lausanne) 2021; 12:774608. [PMID: 35046894 PMCID: PMC8763273 DOI: 10.3389/fendo.2021.774608] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 12/01/2021] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE Gestational diabetes mellitus (GDM) is one of the most common complications of pregnancy, and its pathogenesis is still unclear. Studies have shown that circular RNAs (circRNAs) can regulate blood glucose levels by targeting mRNAs, but the role of circRNAs in GDM is still unknown. Therefore, a joint microarray analysis of circRNAs and their target mRNAs in GDM patients and healthy pregnant women was carried out. METHODS In this study, microarray analyses of mRNA and circRNA in 6 GDM patients and 6 healthy controls were conducted to identify the differentially expressed mRNA and circRNA in GDM patients, and some of the discovered mRNAs and circRNAs were further validated in additional 56 samples by quantitative realtime PCR (qRT-PCR) and droplet digital PCR (ddPCR). RESULTS Gene ontology and pathway analyses showed that the differentially expressed genes were significantly enriched in T cell immune-related pathways. Cross matching of the differentially expressed mRNAs and circRNAs in the top 10 KEGG pathways identified 4 genes (CBLB, ITPR3, NFKBIA, and ICAM1) and 4 corresponding circRNAs (circ-CBLB, circ-ITPR3, circ-NFKBIA, and circ-ICAM1), and these candidates were subsequently verified in larger samples. These differentially expressed circRNAs and their linear transcript mRNAs were all related to the T cell receptor signaling pathway, and PCR results confirmed the initial microarray results. Moreover, circRNA/miRNA/mRNA interactions and circRNA-binding proteins were predicted, and circ-CBLB, circ-ITPR3, and circ-ICAM1 may serve as GDM-related miRNA sponges and regulate the expression of CBLB, ITPR3, NFKBIA, and ICAM1 in cellular immune pathways. CONCLUSION Upregulation of T cell receptor signaling pathway components may represent the major pathological mechanism underlying GDM, thus providing a potential approach for the prevention and treatment of GDM.
Collapse
Affiliation(s)
- Yan-ming Chen
- Department of Science and Education, Affiliated People’s Hospital of Ningbo University, Ningbo, China
- Department of Preventive Medicine, School of Medicine, Ningbo University, Ningbo, China
| | - Qiong Zhu
- Department of Pediatrics, Affiliated People’s Hospital of Ningbo University, Ningbo, China
| | - Jie Cai
- Department of Reproductive Medicine, Ningbo Women and Children’s Hospital, Ningbo, China
| | - Zhi-jia Zhao
- Department of Preventive Medicine, School of Medicine, Ningbo University, Ningbo, China
| | - Bin-bin Yao
- Department of Preventive Medicine, School of Medicine, Ningbo University, Ningbo, China
| | - Li-ming Zhou
- Department of Reproductive Medicine, Ningbo Women and Children’s Hospital, Ningbo, China
| | - Lin-dan Ji
- Department of Science and Education, Affiliated People’s Hospital of Ningbo University, Ningbo, China
- Department of Biochemistry, School of Medicine, Ningbo University, Ningbo, China
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
- *Correspondence: Lin-dan Ji, ; Jin Xu,
| | - Jin Xu
- Department of Preventive Medicine, School of Medicine, Ningbo University, Ningbo, China
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
- *Correspondence: Lin-dan Ji, ; Jin Xu,
| |
Collapse
|
6
|
Celebi G, Kesim H, Ozer E, Kutlu O. The Effect of Dysfunctional Ubiquitin Enzymes in the Pathogenesis of Most Common Diseases. Int J Mol Sci 2020; 21:ijms21176335. [PMID: 32882786 PMCID: PMC7503467 DOI: 10.3390/ijms21176335] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/17/2020] [Accepted: 07/18/2020] [Indexed: 12/14/2022] Open
Abstract
Ubiquitination is a multi-step enzymatic process that involves the marking of a substrate protein by bonding a ubiquitin and protein for proteolytic degradation mainly via the ubiquitin–proteasome system (UPS). The process is regulated by three main types of enzymes, namely ubiquitin-activating enzymes (E1), ubiquitin-conjugating enzymes (E2), and ubiquitin ligases (E3). Under physiological conditions, ubiquitination is highly reversible reaction, and deubiquitinases or deubiquitinating enzymes (DUBs) can reverse the effect of E3 ligases by the removal of ubiquitin from substrate proteins, thus maintaining the protein quality control and homeostasis in the cell. The dysfunction or dysregulation of these multi-step reactions is closely related to pathogenic conditions; therefore, understanding the role of ubiquitination in diseases is highly valuable for therapeutic approaches. In this review, we first provide an overview of the molecular mechanism of ubiquitination and UPS; then, we attempt to summarize the most common diseases affecting the dysfunction or dysregulation of these mechanisms.
Collapse
Affiliation(s)
- Gizem Celebi
- Faculty of Engineering and Natural Sciences, Molecular Biology, Genetics, and Bioengineering Program, Sabanci University, Istanbul 34956, Turkey; (G.C.); (H.K.); (E.O.)
| | - Hale Kesim
- Faculty of Engineering and Natural Sciences, Molecular Biology, Genetics, and Bioengineering Program, Sabanci University, Istanbul 34956, Turkey; (G.C.); (H.K.); (E.O.)
| | - Ebru Ozer
- Faculty of Engineering and Natural Sciences, Molecular Biology, Genetics, and Bioengineering Program, Sabanci University, Istanbul 34956, Turkey; (G.C.); (H.K.); (E.O.)
| | - Ozlem Kutlu
- Sabanci University Nanotechnology Research and Application Center (SUNUM), Istanbul 34956, Turkey
- Center of Excellence for Functional Surfaces and Interfaces for Nano Diagnostics (EFSUN), Sabanci University, Istanbul 34956, Turkey
- Correspondence: ; Tel.: +90-216-483-9000 (ext. 2413)
| |
Collapse
|
7
|
Zhang ZY, Bai HH, Guo Z, Li HL, Diao XT, Zhang TY, Yao L, Ma JJ, Cao Z, Li YX, Bai X, Chen HK, Suo ZW, Yang X, Hu XD. Ubiquitination and functional modification of GluN2B subunit-containing NMDA receptors by Cbl-b in the spinal cord dorsal horn. Sci Signal 2020; 13:13/638/eaaw1519. [PMID: 32606037 DOI: 10.1126/scisignal.aaw1519] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
N-methyl-d-aspartate (NMDA) glutamate receptors (NMDARs) containing GluN2B subunits are prevalent early after birth in most brain regions in rodents. Upon synapse maturation, GluN2B is progressively removed from synapses, which affects NMDAR function and synaptic plasticity. Aberrant recruitment of GluN2B into mature synapses has been implicated in several neuropathologies that afflict adults. We found that the E3 ubiquitin ligase Cbl-b was enriched in the spinal cord dorsal horn neurons of mice and rats and suppressed GluN2B abundance during development and inflammatory pain. Cbl-b abundance increased from postnatal day 1 (P1) to P14, a critical time period for synapse maturation. Through its N-terminal tyrosine kinase binding domain, Cbl-b interacted with GluN2B. Ubiquitination of GluN2B by Cbl-b decreased the synaptic transmission mediated by GluN2B-containing NMDARs. Knocking down Cbl-b in vivo during P1 to P14 led to sustained retention of GluN2B at dorsal horn synapses, suggesting that Cbl-b limits the synaptic abundance of GluN2B in adult mice. However, peripheral inflammation induced by intraplantar injection of complete Freund's adjuvant resulted in the dephosphorylation of Cbl-b at Tyr363, which impaired its binding to and ubiquitylation of GluN2B, enabling the reappearance of GluN2B-containing NMDARs at synapses. Expression of a phosphomimic Cbl-b mutant in the dorsal horn suppressed both GluN2B-mediated synaptic currents and manifestations of pain induced by inflammation. The findings indicate a ubiquitin-mediated developmental switch in NMDAR subunit composition that is dysregulated by inflammation, which can enhance nociception.
Collapse
Affiliation(s)
- Zi-Yang Zhang
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Hu-Hu Bai
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Zhen Guo
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Hu-Ling Li
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Xin-Tong Diao
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Tian-Yu Zhang
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Lin Yao
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Juan-Juan Ma
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Zheng Cao
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Yin-Xia Li
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Xue Bai
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Hai-Kun Chen
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Zhan-Wei Suo
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Xian Yang
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Xiao-Dong Hu
- Department of Molecular Pharmacology, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu, P.R. China.
| |
Collapse
|
8
|
Chehin MB, Fraietta R, Lorenzon AR, Bonetti TCS, Motta ELA. The insulin signaling pathway is dysregulated in cumulus cells from obese, infertile women with polycystic ovarian syndrome with an absence of clinical insulin resistance. Ther Adv Reprod Health 2020; 14:2633494120906866. [PMID: 32596667 PMCID: PMC7303777 DOI: 10.1177/2633494120906866] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 01/20/2020] [Indexed: 01/12/2023] Open
Abstract
Methods: This is a cohort study, conducted at a university-based reproductive medicine
center and private reproductive medicine center that aimed to evaluate
granulosa cumulus cell gene expression in the insulin signaling pathway in
Polycystic Ovary Syndrome (PCOS) patients undergoing in vitro fertilization
(IVF) treatment and to compare the cumulus gene expression between normal
weight and obese women without clinical insulin resistance. Fifteen PCOS
patients, nine normal weight patients and six obese patients presenting
normal HOMA IR (Homeostasis Model Assessment–Insulin Resistance),
participated. Patients underwent oocyte retrieval for IVF and after the
procedure, granulosa cumulus cells were removed from the oocytes for RNA
extraction. Quantitative polymerase chain reaction (PCR) array analysis of
84 genes from insulin signaling pathway was conducted. The results were
expressed as fold up- or fold down-expression in obese patients compared
with normal weight patients. Any fold change ⩾3 or ⩽3 and any
p ⩽ 0.05 were considered statistically significant. Results: There were 10 genes that were overexpressed in obese compared with normal
weight women, BCL2L1, BRAF, CBL, DOK1, FBP1, FRS2, MTOR, PCK2, RPS6KA1, and
SORBS1, that had a fold change ⩾3 and p ⩽ 0.05. Discussion: In the obese group, the overexpressed genes are mainly responsible for the
proliferation and differentiation of cumulus cells during oocyte maturation,
insulin resistance, apoptosis regulation, and glucose metabolism during
early embryogenesis, suggesting that in the follicular environment, insulin
resistance is present even in the absence of clinical signs. Conclusion: Together, our findings and the related literature suggest that those
alterations may be associated with the worse prognosis of follicular
development and oocyte maturation observed in PCOS obese women.
Collapse
Affiliation(s)
- Mauricio B Chehin
- Huntington Medicina Reprodutiva, Medical Coordinator Vila Mariana, Rua Sena Madureira, 100, São Paulo, SP 04021-000, Brazil
| | - Renato Fraietta
- Human Reproduction Section, Surgery Discipline, Urology Department Escola Paulista de Medicina da Universidade Federal de São Paulo (UNIFESP-EPM), São Paulo, Brazil
| | | | - Tatiana C S Bonetti
- Gynecology Endocrinology Discipline, Gynecology Department, Escola Paulista de Medicina da Universidade Federal de Sao Paulo (UNIFESP-EPM), São Paulo, Brazil
| | - Eduardo L A Motta
- Gynecology Endocrinology Discipline, Gynecology Department, Escola Paulista de Medicina da Universidade Federal de Sao Paulo (UNIFESP-EPM), São Paulo, Brazil
| |
Collapse
|
9
|
Chen K, Wan X, Zhao L, Zhao S, Peng L, Yang W, Yuan J, Zhu L, Mo Z. Cbl Proto-Oncogene B (CBLB) c.197A>T Mutation Induces Mild Metabolic Dysfunction in Partial Type I Multiple Symmetric Lipomatosis (MSL). Diabetes Metab Syndr Obes 2020; 13:3535-3549. [PMID: 33116705 PMCID: PMC7547790 DOI: 10.2147/dmso.s273780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 09/11/2020] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Multiple symmetric lipomatosis (MSL) is a rare disease showing chronic progression of multiple, symmetrical, and non-encapsulated subcutaneous lipoma. The cause of the disease remains unknown. PATIENTS AND METHODS This study reported and summarized 13 sporadic cases of Type I MSL patients in terms of histopathology and cellular and molecular biology and assessed the CBLB c.197A>T mutation in the IRS1-PI3K-Akt pathway. RESULTS The clinical data showed that these 13 Type I patients were all male with a mean age of 57.0 ± 6.6 years old and consumed alcohol heavily. The laboratory tests revealed that most of the patients had hyperuricemia, diabetes, hyperinsulinemia, or insulin resistance; however, their blood lipid levels were close to a normal range. The imaging data exhibited lipomas that only occurred subcutaneously but not viscerally, ie, Types Ia (15.4%), Ib (30.8%), and Ic (53.8%). The molecular analyses of adipocytes of isoprenaline stimulated human adipose tissue-derived mesenchymal stromal cells (hADSCs) isolated from the adipose tissue lipoma-like masses (ATLLM) demonstrated that these adipocytes did not express UCP-1. The Cbl proto-oncogene B (CBLB), an E3 ubiquitin-protein ligase, was associated with insulin resistance and obesity and was mutated (ie, CBLB c.197A>T) in four MSL patients after the whole genome and Sanger sequencing of the blood samples. Furthermore, the CBLB c.197A>T mutation induced hADSC resistance to insulin by inactivation of the IRS-1-PI3K-AKT pathway. CONCLUSION This study analyzed clinical, histopathological, and cellular and molecular biological characterizations of 13 Type I MSL patients and identified the CBLB c.197A>T heterozygous mutation that could be responsible for MSL metabolic dysfunction or even MSL development.
Collapse
Affiliation(s)
- Ke Chen
- Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, Hunan410013, People’s Republic of China
| | - Xinxing Wan
- Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, Hunan410013, People’s Republic of China
| | - Liling Zhao
- Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, Hunan410013, People’s Republic of China
| | - Shaoli Zhao
- Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, Hunan410013, People’s Republic of China
| | - Lin Peng
- Department of Nephrology, The First Hospital of Changsha, Changsha, Hunan410005, People’s Republic of China
| | - Wenjun Yang
- Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, Hunan410013, People’s Republic of China
| | - Jingjing Yuan
- Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, Hunan410013, People’s Republic of China
| | - Liyong Zhu
- Department of General Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan410013, People’s Republic of China
| | - Zhaohui Mo
- Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, Hunan410013, People’s Republic of China
- Correspondence: Zhaohui Mo Tel/Fax +86 731 88618006 Email
| |
Collapse
|
10
|
Maciukiewicz M, Tiwari AK, Zai CC, Gorbovskaya I, Laughlin CP, Nurmi EL, Liebermann JA, Meltzer HY, Kennedy JL, Müller DJ. Genome-wide association study on antipsychotic-induced weight gain in Europeans and African-Americans. Schizophr Res 2019; 212:204-212. [PMID: 31447353 DOI: 10.1016/j.schres.2019.07.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 06/13/2019] [Accepted: 07/11/2019] [Indexed: 01/07/2023]
Abstract
BACKGROUND Antipsychotic (AP) medications are the first line of treatment for schizophrenia. However, most conferr a risk of antipsychotic-induced weight gain (AIWG). The objective of this investigation was to conduct a genome-wide association study (GWAS) of AIWG, followed by comprehensive, post-GWAS approaches. METHODS We investigated n = 201 schizophrenia or schizoaffective disorder patients of European and African American ancestry who were treated primarily with clozapine or olanzapine. We conducted a genome-wide association analysis for AIWG, defined primarily as a percentage of weight change from baseline. RESULTS When examining Europeans (n = 147), we noticed an association between rs62097526 (β = 0.39, p = 3.59 × 10-6, CADD = 2.213) variant, located downstream of the CIDEA gene, which is considered a risk factor for AIWG. In the entire sample, we observed a significant association between rs1525085 (β = 0.411, p = 3.15 × 10-9) variant of the DGKB gene and AIWG. The association was nominally significant in Europeans (β = 0.271, p = 0.002) and African Americans (β = 0.579, p = 5.73 × 10-5) with the same risk allele. Our top genes (p < 5 × 10-5) were enriched in the GWAS catalog for the risk of obesity and interacted with the known risk factors for obesity (G6PD) and diabetes (IRS1). In addition, these genes are targeted by miRNAs related to schizophrenia (mir-34a) and obesity (mir-19b). However, our polygenic risk score analyses did not provide support for major genetic overlap between obesity and the risk of AIWG. CONCLUSIONS In summary, we propose that the CIDEA and DGKB genes are risk factors for AIWG in transethnic populations. Additionally, our evidence suggests that the G6PD and IRS1 gene-related pathways might be involved in AIWG.
Collapse
Affiliation(s)
- Malgorzata Maciukiewicz
- Pharmacogenetic Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Arun K Tiwari
- Pharmacogenetic Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada; Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | - Clement C Zai
- Pharmacogenetic Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada; Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | - Ilona Gorbovskaya
- Pharmacogenetic Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Christopher P Laughlin
- Division of Child and Adolescent Psychiatry, UCLA Semel Institute for Neuroscience, Los Angeles, California, USA
| | - Erika L Nurmi
- Division of Child and Adolescent Psychiatry, UCLA Semel Institute for Neuroscience, Los Angeles, California, USA
| | - Jeffrey A Liebermann
- Department of Psychiatry, College of Physicians & Surgeons, Columbia University, New York, NY, USA
| | - Herbert Y Meltzer
- Department of Psychiatry and Behavioral Sciences, Northwestern University, Chicago, IL, USA
| | - James L Kennedy
- Pharmacogenetic Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada; Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada; Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Daniel J Müller
- Pharmacogenetic Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada; Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada; Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
| |
Collapse
|
11
|
Hamidzadeh K, Christensen SM, Dalby E, Chandrasekaran P, Mosser DM. Macrophages and the Recovery from Acute and Chronic Inflammation. Annu Rev Physiol 2017; 79:567-592. [PMID: 27959619 PMCID: PMC5912892 DOI: 10.1146/annurev-physiol-022516-034348] [Citation(s) in RCA: 230] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In recent years, researchers have devoted much attention to the diverse roles of macrophages and their contributions to tissue development, wound healing, and angiogenesis. What should not be lost in the discussions regarding the diverse biology of these cells is that when perturbed, macrophages are the primary contributors to potentially pathological inflammatory processes. Macrophages stand poised to rapidly produce large amounts of inflammatory cytokines in response to danger signals. The production of these cytokines can initiate a cascade of inflammatory mediator release that can lead to wholesale tissue destruction. The destructive inflammatory capability of macrophages is amplified by exposure to exogenous interferon-γ, which prolongs and heightens inflammatory responses. In simple terms, macrophages can thus be viewed as incendiary devices with hair triggers waiting to detonate. We have begun to ask questions about how these cells can be regulated to mitigate the collateral destruction associated with macrophage activation.
Collapse
Affiliation(s)
- Kajal Hamidzadeh
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, Maryland 20742;
| | - Stephen M Christensen
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, Maryland 20742;
| | - Elizabeth Dalby
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, Maryland 20742;
| | - Prabha Chandrasekaran
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, Maryland 20742;
| | - David M Mosser
- Department of Cell Biology and Molecular Genetics, Maryland Pathogen Research Institute, University of Maryland, College Park, Maryland 20742;
| |
Collapse
|
12
|
Galbas T, Raymond M, Sabourin A, Bourgeois-Daigneault MC, Guimont-Desrochers F, Yun TJ, Cailhier JF, Ishido S, Lesage S, Cheong C, Thibodeau J. MARCH1 E3 Ubiquitin Ligase Dampens the Innate Inflammatory Response by Modulating Monocyte Functions in Mice. THE JOURNAL OF IMMUNOLOGY 2016; 198:852-861. [PMID: 27940660 DOI: 10.4049/jimmunol.1601168] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 11/09/2016] [Indexed: 12/15/2022]
Abstract
Ubiquitination was recently identified as a central process in the pathogenesis and development of numerous inflammatory diseases, such as obesity, atherosclerosis, and asthma. Treatment with proteasomal inhibitors led to severe side effects because ubiquitination is heavily involved in a plethora of cellular functions. Thus, new players regulating ubiquitination processes must be identified to improve therapies for inflammatory diseases. In addition to their role in adaptive immunity, endosomal MHC class II (MHCII) molecules were shown to modulate innate immune responses by fine tuning the TLR4 signaling pathway. However, the role of MHCII ubiquitination by membrane associated ring-CH-type finger 1 (MARCH1) E3 ubiquitin ligase in this process remains to be assessed. In this article, we demonstrate that MARCH1 is a key inhibitor of innate inflammation in response to bacterial endotoxins. The higher mortality of March1-/- mice challenged with a lethal dose of LPS was associated with significantly stronger systemic production of proinflammatory cytokines and splenic NK cell activation; however, we did not find evidence that MARCH1 modulates LPS or IL-10 signaling pathways. Instead, the mechanism by which MARCH1 protects against endotoxic shock rests on its capacity to promote the transition of monocytes from Ly6CHi to Ly6C+/- Moreover, in competitive bone marrow chimeras, March1-/- monocytes and polymorphonuclear neutrophils outcompeted wild-type cells with regard to bone marrow egress and homing to peripheral organs. We conclude that MARCH1 exerts MHCII-independent effects that regulate the innate arm of immunity. Thus, MARCH1 might represent a potential new target for emerging therapies based on ubiquitination reactions in inflammatory diseases.
Collapse
Affiliation(s)
- Tristan Galbas
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montreal, Montreal, Quebec H3T 1J4, Canada.,Laboratoire d'Immunologie Moléculaire, Université de Montréal, Montreal, Quebec H3T 1J4, Canada
| | - Maxime Raymond
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montreal, Montreal, Quebec H3T 1J4, Canada.,Laboratoire d'Immunologie Moléculaire, Université de Montréal, Montreal, Quebec H3T 1J4, Canada
| | - Antoine Sabourin
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montreal, Montreal, Quebec H3T 1J4, Canada.,Laboratoire d'Immunologie Moléculaire, Université de Montréal, Montreal, Quebec H3T 1J4, Canada
| | - Marie-Claude Bourgeois-Daigneault
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montreal, Montreal, Quebec H3T 1J4, Canada.,Laboratoire d'Immunologie Moléculaire, Université de Montréal, Montreal, Quebec H3T 1J4, Canada
| | - Fanny Guimont-Desrochers
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montreal, Montreal, Quebec H3T 1J4, Canada.,Immunology-Oncology Section, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada
| | - Tae Jin Yun
- Laboratoire de Physiologie Cellulaire et Immunologie, Institut de Recherches Cliniques de Montréal, Montreal, Quebec H2W 1R7, Canada
| | - Jean-François Cailhier
- Centre de Recherche, Centre Hospitalier de l'Université de Montréal, Montreal, Quebec H2X 0A9, Canada; and
| | - Satoshi Ishido
- Department of Microbiology, Hyogo College of Medicine 1-1, Mukogawa-cho, Nishinomiya 663-8501, Japan
| | - Sylvie Lesage
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montreal, Montreal, Quebec H3T 1J4, Canada.,Immunology-Oncology Section, Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada
| | - Cheolho Cheong
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montreal, Montreal, Quebec H3T 1J4, Canada.,Laboratoire de Physiologie Cellulaire et Immunologie, Institut de Recherches Cliniques de Montréal, Montreal, Quebec H2W 1R7, Canada
| | - Jacques Thibodeau
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montreal, Montreal, Quebec H3T 1J4, Canada; .,Laboratoire d'Immunologie Moléculaire, Université de Montréal, Montreal, Quebec H3T 1J4, Canada
| |
Collapse
|
13
|
Chen Z. Adapter proteins regulate insulin resistance and lipid metabolism in obesity. Sci Bull (Beijing) 2016. [DOI: 10.1007/s11434-016-1058-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
14
|
Yang XD, Xiang DX, Yang YY. Role of E3 ubiquitin ligases in insulin resistance. Diabetes Obes Metab 2016; 18:747-54. [PMID: 27097743 DOI: 10.1111/dom.12677] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/09/2016] [Accepted: 04/17/2016] [Indexed: 12/19/2022]
Abstract
E3 ubiquitin ligases are a large family of proteins that catalyse the ubiquitination of many proteins for degradation by the 26S proteasome. E3 ubiquitin ligases play pivotal roles in the process of insulin resistance and diabetes. In this review, we summarize the currently available studies to analyse the potential role of E3 ubiquitin ligases in the development of insulin resistance. We propose two mechanisms by which E3 ubiquitin ligases can affect the process of insulin resistance. First, E3 ubiquitin ligases directly degrade the insulin receptor, insulin receptor substrate and other key insulin signalling molecules via the UPS. Second, E3 ubiquitin ligases indirectly regulate insulin signalling by regulating pro-inflammatory mediators that are involved in the regulation of insulin signalling molecules, such as tumour necrosis factor-α, interleukin (IL)-6, IL-4, IL-13, IL-1β, monocyte chemoattractant protein-1 and hypoxia-inducible factor 1α. Determining the mechanism by which E3 ubiquitin ligases affect the development of insulin resistance can identify a novel strategy to protect against insulin resistance and diabetes.
Collapse
Affiliation(s)
- X-D Yang
- Department of Pharmacy, the Second Xiangya Hospital, Central South University, Changsha, China
| | - D-X Xiang
- Department of Pharmacy, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Y-Y Yang
- Department of Pharmacy, the Second Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
15
|
Goru SK, Pandey A, Gaikwad AB. E3 ubiquitin ligases as novel targets for inflammatory diseases. Pharmacol Res 2016; 106:1-9. [PMID: 26875639 DOI: 10.1016/j.phrs.2016.02.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 02/05/2016] [Accepted: 02/05/2016] [Indexed: 11/29/2022]
Abstract
Ubiquitination is one of the post translational modifications which decide the fate of various proteins in the cells, by either directing them towards proteasomal degradation or participation in several cell signalling pathways. Recently, the role of ubiquitination has been unravelled in pathogenesis and progression of various diseases, where inflammation is critical, like obesity, insulin resistance, atherosclerosis, angiotensin-II induced cardiac inflammation and asthma. E3 ligases are known to be instrumental in regulation of the inflammatory cascade. This review focuses on the role of different E3 ligases in the development of inflammatory diseases and thus may help us to target these E3 ligases in future drug discovery to prevent inflammation.
Collapse
Affiliation(s)
- Santosh Kumar Goru
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Pilani Campus, Rajasthan 333031, India
| | - Anuradha Pandey
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Pilani Campus, Rajasthan 333031, India
| | - Anil Bhanudas Gaikwad
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Pilani Campus, Rajasthan 333031, India.
| |
Collapse
|
16
|
Li JJ, Ferry RJ, Diao S, Xue B, Bahouth SW, Liao FF. Nedd4 haploinsufficient mice display moderate insulin resistance, enhanced lipolysis, and protection against high-fat diet-induced obesity. Endocrinology 2015; 156:1283-91. [PMID: 25607895 PMCID: PMC4399314 DOI: 10.1210/en.2014-1909] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Neural precursor cell expressed developmentally down-regulated protein 4 (Nedd4) is the prototypical protein in the Nedd4 ubiquitin ligase (E3) family, which governs ubiquitin-dependent endocytosis and/or degradation of plasma membrane proteins. Loss of Nedd4 results in embryonic or neonatal lethality in mice and reduced insulin/IGF-1 signaling in embryonic fibroblasts. To delineate the roles of Nedd4 in vivo, we examined the phenotypes of heterozygous knockout mice using a high-fat diet-induced obesity (HFDIO) model. We observed that Nedd4+/- mice are moderately insulin resistant but paradoxically protected against HFDIO. After high-fat diet feeding, Nedd4+/- mice showed less body weight gain, less fat mass, and smaller adipocytes vs the wild type. Despite ameliorated HFDIO, Nedd4+/- mice did not manifest improvement in glucose tolerance vs the wild type in both genders. Nedd4+/- male, but not female, mice displayed significantly lower fasting blood glucose levels and serum insulin levels. Under obesogenic conditions, Nedd4+/- mice displayed elevated stimulated lipolytic activity, primarily through a β2-adrenergic receptor. Combined, these data support novel complex roles for Nedd4 in metabolic regulation involving altered insulin and β-adrenergic signaling pathways.
Collapse
Affiliation(s)
- Jing Jing Li
- Departments of Pharmacology (J.J.L., S.D., S.W.B., F.-F.L.) and Pediatrics (R.J.F.), University of Tennessee Health Science Center, Memphis, Tennessee 38163; Department of Psychology (R.J.F), University of Memphis, Memphis, Tennessee 38152; and Department of Biology (B.X.), Georgia State University, Atlanta, Georgia 30302
| | | | | | | | | | | |
Collapse
|