1
|
Huang F, Zhao N, Cai P, Hou M, Yang S, Zheng B, Ma Q, Jiang J, Gai X, Mao Y, Wang L, Hu Z, Zha X, Liu F, Zhang H. Active AKT2 stimulation of SREBP1/SCD1-mediated lipid metabolism boosts hepatosteatosis and cancer. Transl Res 2024; 268:51-62. [PMID: 38244769 DOI: 10.1016/j.trsl.2024.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 01/14/2024] [Accepted: 01/17/2024] [Indexed: 01/22/2024]
Abstract
Due to soared obesity population worldwide, hepatosteatosis is becoming a major risk factor for hepatocellular carcinoma (HCC). Undertaken molecular events during the progression of steatosis to liver cancer are thus under intensive investigation. In this study, we demonstrated that high-fat diet potentiated mouse liver AKT2. Hepatic AKT2 hyperactivation through gain-of-function mutation of Akt2 (Akt2E17K) caused spontaneous hepatosteatosis, injury, inflammation, fibrosis, and eventually HCC in mice. AKT2 activation also exacerbated lipopolysaccharide and D-galactosamine hydrochloride-induced injury/inflammation and N-Nitrosodiethylamine (DEN)-induced HCC. A positive correlation between AKT2 activity and SCD1 expression was observed in human HCC samples. Activated AKT2 enhanced the production of monounsaturated fatty acid which was dependent on SREBP1 upregulation of SCD1. Blockage of active SREBP1 and ablation of SCD1 reduced steatosis, inflammation, and tumor burden in DEN-treated Akt2E17K mice. Therefore, AKT2 activation is crucial for the development of steatosis-associated HCC which can be treated with blockage of AKT2-SREBP1-SCD1 signaling cascade.
Collapse
Affiliation(s)
- Fuqiang Huang
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Na Zhao
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Department of Blood Transfusion, Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, China
| | - Pei Cai
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Mengjie Hou
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Shuhui Yang
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Bohao Zheng
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Qian Ma
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Jingpeng Jiang
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xiaochen Gai
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yilei Mao
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Lianmei Wang
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Zhongdong Hu
- Modern Research Center for Traditional Chinese Medicine, Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Xiaojun Zha
- Department of Biochemistry & Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei, China
| | - Fangming Liu
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - Hongbing Zhang
- State Key Laboratory of Common Mechanism Research for Major Diseases, Haihe Laboratory of Cell Ecosystem, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| |
Collapse
|
2
|
Shi P, Meng R, Xu J, Zhang Q, Ye G, Yan X, Liao K. Fatty acid translocase (FAT/CD36) in silver pomfret (Pampus argenteus): Molecular cloning and functional characterization. Comp Biochem Physiol B Biochem Mol Biol 2024; 270:110926. [PMID: 38036286 DOI: 10.1016/j.cbpb.2023.110926] [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: 09/25/2023] [Revised: 11/22/2023] [Accepted: 11/23/2023] [Indexed: 12/02/2023]
Abstract
Understanding the mechanisms of lipid transport and metabolism in fish is crucial to enhance dietary lipid utilization. Here, fatty acid translocase (CD36) gene was characterized in silver pomfret (Pampus argenteus). The open reading frame of silver pomfret cd36 gene was 1395 bp, encoding 464 amino acids. The silver pomfret CD36 protein contained typical transmembrane regions and N-glycosylation modification sites, and was localized to the cytomembrane. The cd36 gene was ubiquitously expressed in all tested tissues, with the highest expression observed in brain tissue. In vivo, both fasting and short-term high-fat feeding could increase cd36 expression in intestinal tissue. In vitro, cd36 expression was induced by palmitic acid, oleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid treatment in intestinal tissue. Furthermore, dual-luciferase reporter assay results indicated that peroxisome proliferator-activated receptor gamma (PPARγ) could enhance cd36 promoter activity, and the co-expression of cd36 and pparγ was observed in EPA-incubated intestine, suggesting that EPA may regulate the expression of cd36 via PPARγ to maintain the homeostasis of intestinal lipid metabolism in silver pomfret. These results highlighted the crucial role of CD36 in silver pomfret, and suggested that the cd36 expression may be regulated by PPARγ. This study could contribute to a greater understanding of lipid metabolism and the development of effective strategies for nutrient requirements in fish.
Collapse
Affiliation(s)
- Peng Shi
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Ran Meng
- Ningbo Academy of Oceanology and Fishery, Ningbo 315012, China
| | - Jilin Xu
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Qian Zhang
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Guochao Ye
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Xiaojun Yan
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Kai Liao
- School of Marine Sciences, Ningbo University, Ningbo 315211, China.
| |
Collapse
|
3
|
Morphological and Molecular Functional Evidence of the Pharyngeal Sac in the Digestive Tract of Silver Pomfret, Pampus argenteus. Int J Mol Sci 2023; 24:ijms24021663. [PMID: 36675173 PMCID: PMC9866116 DOI: 10.3390/ijms24021663] [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: 11/11/2022] [Revised: 12/24/2022] [Accepted: 01/09/2023] [Indexed: 01/18/2023] Open
Abstract
The pharyngeal sac is a comparatively rare organ in the digestive tract among teleost fishes. However, our understanding of this remarkable organ in the silver pomfret (Pampus argenteus) is limited. In the present study, we examined the various morphological and histological characteristics of the pharyngeal sac using histochemical techniques and electron microscopy. The pharyngeal sac showed unique characteristics such as well-developed muscular walls, weakly keratinized epithelium, numerous goblet cells, and needle-like processes on the papillae. The porous cavity of the papillae contained numerous adipocytes and was tightly enveloped by type I collagen fibers. These structures might provide mechanical protection and excellent biomechanical properties for grinding and shredding prey. A comparison of gene expression levels between the pharyngeal sac and esophagus using RNA-seq showed that phenotype-associated genes (epithelial genes and muscle genes) were upregulated, whereas genes related to nutrient digestion and absorption were downregulated in the pharyngeal sac. These results support the role of the pharyngeal sac in shredding and predigesting food. Overall, these findings provide a clearer understanding of the pharyngeal sac morphology and explain the morphological adaptations of the digestive tract for feeding on gelatinous prey. To our knowledge, this is the first report on pharyngeal sac gene expression in P. argenteus.
Collapse
|
4
|
Bai L, Shi P, Jia K, Yin H, Xu J, Yan X, Liao K. Triflumizole Induces Developmental Toxicity, Liver Damage, Oxidative Stress, Heat Shock Response, Inflammation, and Lipid Synthesis in Zebrafish. TOXICS 2022; 10:698. [PMID: 36422906 PMCID: PMC9699234 DOI: 10.3390/toxics10110698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/12/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
Triflumizole (TFZ) toxicity must be investigated in the aquatic environment to understand the potential risks to aquatic species. Accordingly, the adverse effects of TFZ exposure in zebrafish were investigated. Results demonstrate that, after TFZ exposure, the lethal concentration 50 (LC50) in 3 d post-fertilization (dpf) embryos and 6 dpf larvae were 4.872 and 2.580 mg/L, respectively. The development (including pericardium edema, yolk sac retention, and liver degeneration) was apparently affected in 3 dpf embryos. Furthermore, the alanine aminotransferase (ALT) activity, superoxide dismutase (SOD) activity, catalase (CAT) activity, and malondialdehyde (MDA) content in 6 dpf larvae were significantly increased. Additionally, the expression of heat shock response genes (including hsp70, grp78, hsp90, and grp94), inflammatory genes (including p65-nfκb, il-1β, and cox2a), and lipid synthetic genes (including srebp1, fas, acc, and ppar-γ) in 3 dpf embryos was significantly increased, which was also partially observed in the intestinal cell line form Pampus argenteus. Taken together, TFZ could affect the development of zebrafish, accompanied by disturbances of oxidative stress, heat shock response, inflammation, and lipid synthesis. Our findings provide an original insight into the potential risks of TFZ to the aquatic ecosystem.
Collapse
Affiliation(s)
- Lina Bai
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Peng Shi
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Kun Jia
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Hua Yin
- Ningbo No. 2 Hospital, Ningbo 315010, China
| | - Jilin Xu
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Xiaojun Yan
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Kai Liao
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| |
Collapse
|
5
|
Shi P, Liao K, Xu J, Wang Y, Xu S, Yan X. Eicosapentaenoic acid mitigates palmitic acid-induced heat shock response, inflammation and repair processes in fish intestine. FISH & SHELLFISH IMMUNOLOGY 2022; 124:362-371. [PMID: 35421576 DOI: 10.1016/j.fsi.2022.04.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/05/2022] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Abstract
Understanding the metabolic effects of fatty acids on fish intestine is critical to the substitution of fish oil with vegetable oils in aquaculture. In this study, the effects of eicosapentaenoic acid (EPA) and palmitic acid (PA) on fish intestine were evaluated in vitro and in vivo. As the first step for in vitro study, an intestinal cell line (SPIF) was established from silver pomfret (Pampus argenteus). Thereafter, the effects of EPA and PA on cell viability, prostaglandin E2 (PGE2) production, and the expression of genes related to heat shock response, inflammation, extracellular matrix (ECM) formation and degradation were examined in SPIF cells. Finally, these metabolic effects of EPA and PA on the intestine were examined in zebrafish (Danio rerio) larvae. Results showed that all tested fatty acids (PA, oleic acid, linoleic acid, α-linolenic acid, arachidonic acid, and docosahexaenoic acid) except EPA reduced SPIF viability to distinct degrees at the same concentrations. PA decreased SPIF viability accompanied by an increase in PGE2 level. Meanwhile, PA increased the expression of genes related to heat shock response (grp78, grp94, hsp70, and hsp90) and inflammation (nf-κb, il-1β, and cox2). Furthermore, PA reduced the expression of collagen type I (col1a1a and col1a1b) and extracellular matrix (ECM) degradation-related gene mmp2, while up-regulating timp2 mRNA expression. In vivo, PA also increased hsp70, il-1β, and cox2 mRNA levels and limited the expression of collagen type I in the larval zebrafish intestine. Interestingly, the combination of EPA and PA partially recovered the PA-induced changes in cell viability, PGE2 production, and mRNA expression in vitro and in vivo. These results suggest that PA may result in heat shock and inflammatory responses, as well as alter ECM formation and degradation in fish intestine, while EPA could at least partially mitigate these negative effects caused by PA.
Collapse
Affiliation(s)
- Peng Shi
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, 315211, PR China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education of China, Ningbo, Zhejiang, 315211, PR China
| | - Kai Liao
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, 315211, PR China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education of China, Ningbo, Zhejiang, 315211, PR China.
| | - Jilin Xu
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, 315211, PR China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education of China, Ningbo, Zhejiang, 315211, PR China
| | - Yajun Wang
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, 315211, PR China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education of China, Ningbo, Zhejiang, 315211, PR China
| | - Shanliang Xu
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, 315211, PR China; Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education of China, Ningbo, Zhejiang, 315211, PR China
| | - Xiaojun Yan
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education of China, Ningbo, Zhejiang, 315211, PR China
| |
Collapse
|
6
|
Zhu Y, Zhao Y, Chai XX, Zhou J, Shi MJ, Zhao Y, Tian Y, Wang XM, Ying TX, Feng Q, Sheng J, Luo C. Chronic exposure to low-dose cadmium facilitated nonalcoholic steatohepatitis in mice by suppressing fatty acid desaturation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 233:113306. [PMID: 35183812 DOI: 10.1016/j.ecoenv.2022.113306] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 01/18/2022] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Exposure to cadmium (Cd), a toxic metal, is epidemiologically linked to nonalcoholic steatohepatitis (NASH) in humans. However, the role of Cd in NASH remains to be fully elucidated. This study employed a novel murine NASH model to investigate the effects of chronic low-dose Cd on hepatic pathology and its underlying mechanisms. NASH is characterized by lipid accumulation, extensive cell death, and persistent inflammation in the liver. We found that treatment with Cd in drinking water (10 mg/L) for 6 or 12 weeks significantly boosted hepatic fat deposition, increased hepatocyte destruction, and amplified inflammatory responses in mice, confirming that low-dose Cd can facilitate NASH development in vivo. Mechanistically, chronic Cd exposure reshaped the hepatic transcriptional landscape, with PPAR-mediated fatty acid metabolic pathways being the most significantly altered. In particular, Cd repressed fatty acid desaturation, leading to the accumulation of saturated fatty acids whose lipotoxicity exacerbated cell death and, consequently, inflammatory activation. In summary, we validated the causal effects of chronic low-dose Cd on NASH in vivo and identified the fatty acid desaturation program as a novel target for Cd to instigate hepatopathological alterations.
Collapse
Affiliation(s)
- Yi Zhu
- Institute of Environmental Medicine and Hepatobiliary and Pancreatic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, China
| | - Yuanyuan Zhao
- Institute of Environmental Medicine and Hepatobiliary and Pancreatic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, China
| | - Xin-Xin Chai
- Institute of Environmental Medicine and Hepatobiliary and Pancreatic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, China
| | - Jiang Zhou
- Institute of Environmental Medicine and Hepatobiliary and Pancreatic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, China
| | - Meng-Jie Shi
- MD-PhD Program, Zhejiang University School of Medicine, Hangzhou, China
| | - Yurong Zhao
- Institute of Environmental Medicine and Hepatobiliary and Pancreatic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, China
| | - Youjia Tian
- Institute of Environmental Medicine and Hepatobiliary and Pancreatic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, China
| | - Xu-Meng Wang
- Department of Surgical Oncology of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Tian-Xing Ying
- MD-PhD Program, Zhejiang University School of Medicine, Hangzhou, China; Department of Surgical Oncology of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qiao Feng
- Institute of Environmental Medicine and Hepatobiliary and Pancreatic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, China
| | - Jinghao Sheng
- Institute of Environmental Medicine and Hepatobiliary and Pancreatic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, China
| | - Chi Luo
- Institute of Environmental Medicine and Hepatobiliary and Pancreatic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Zhejiang Laboratory for Systems & Precision Medicine, Zhejiang University Medical Center, Hangzhou, China.
| |
Collapse
|
7
|
Wang J, Yang L, Yang L, Zhou F, Zhao H, Liu J, Ma H, Song G. Adipose Dysfunction in Adulthood Insulin Resistance of Low-Birth Weight Mice: A Proteomics Study. Diabetes Metab Syndr Obes 2022; 15:849-862. [PMID: 35321351 PMCID: PMC8935771 DOI: 10.2147/dmso.s353095] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 03/01/2022] [Indexed: 11/23/2022] Open
Abstract
PURPOSE To investigate changes in the protein expression profile of white adipose tissue in low-birth weight (LBW) mice with high-fat diets using tandem mass tag (TMT) and liquid chromatography-mass spectrometry (LC-MS/MS) and parallel reaction monitoring (PRM). METHODS Institute of Cancer Research (ICR) mice were used to establish an LBW model using malnutrition during pregnancy. Male pups were randomly selected from LBW and normal-birth weight (NBW) offspring, then all given a high-fat diet. Blood glucose, serum insulin, total cholesterol (TC) and triglyceride (TG) levels were measured. The weight ratio of liver, muscle, and adiposity index were calculated. Hematoxylin and eosin staining was used to visualize adipose tissue morphology. Oil red O staining of liver and TG content of muscle were used to determine ectopic lipid deposition. TMT combined with LC-MS/MS was used to analyze protein expression in white adipose tissue. PRM and Western blot were used to verify the expression of CD36, SCD1, PCK1 and PPARγ. RESULTS Compared with NBW mice, fasting blood glucose, insulin and HOMA-IR significantly increased in LBW mice, indicating insulin resistance and impaired glucose regulation; TC, TG, adipocyte size, and adiposity index were increased in LBW mice, suggesting obesity and disorder of lipid metabolism. We observed ectopic lipid deposition in liver and muscle. There were 996 differentially expressed proteins (DEPs) in the LBW/NBW groups. Peroxisome proliferator-activated receptor (PPAR) was a relatively important signaling pathway regulating metabolic process in functional enrichment analysis of DEPs. Up-regulated expression of CD36, SCD1, and PCK1 in the adipose tissue of LBW mice was observed through PPAR pathways cluster analysis. And PRM and Western blot assay validated the proteomics findings. CONCLUSION When exposed to high-fat diets, LBW mice exhibited insulin resistance and disorder of lipid metabolism compared with NBW mice. The expression of PPARγ was elevated, as well as upstream CD36, downstream SCD1 and PCK1 of the PPARγ in the adipose tissue of LBW mice. It was suggested that the activation in CD36/PPARγ/SCD1 and CD36/PPARγ/PCK1 pathways may induce adipose dysfunction, thereby increasing susceptibility to insulin resistance.
Collapse
Affiliation(s)
- Jun Wang
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei, People’s Republic of China
- Department of Endocrinology and Metabolic Diseases, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
- Department of Emergency, Baoding First Central Hospital, Baoding, Hebei, People’s Republic of China
| | - Linlin Yang
- Hebei Key Laboratory of Metabolic Diseases, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
| | - Linquan Yang
- Hebei Key Laboratory of Metabolic Diseases, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
| | - Fei Zhou
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei, People’s Republic of China
| | - Hang Zhao
- Department of Endocrinology and Metabolic Diseases, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
| | - Jing Liu
- Department of Endocrinology and Metabolic Diseases, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
| | - Huijuan Ma
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei, People’s Republic of China
- Department of Endocrinology and Metabolic Diseases, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
- Hebei Key Laboratory of Metabolic Diseases, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
- Correspondence: Huijuan Ma, Hebei Key Laboratory of Metabolic Diseases, Hebei General Hospital, 348 Heping West Road, Shijiazhuang, 050051, Hebei, People’s Republic of China, Email
| | - Guangyao Song
- Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei, People’s Republic of China
- Department of Endocrinology and Metabolic Diseases, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China
- Guangyao Song, Department of Endocrinology and Metabolic Diseases, Hebei General Hospital, 348 Heping West Road, Shijiazhuang, 050051, Hebei, People’s Republic of China, Email
| |
Collapse
|