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Oloruntola OD, Ayodele SO, Oloruntola DA, Olarotimi OJ, Falowo AB, Akinduro VO, Gbore FA, Adu OA, Agbede JO. Dietary supplementation of Capsicum powder affects the growth, immunoglobulins, pro-inflammatory cytokines, adipokines, meat, and liver histology of aflatoxin B1 exposed broiler chickens. Toxicon 2024; 240:107640. [PMID: 38325757 DOI: 10.1016/j.toxicon.2024.107640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 02/02/2024] [Accepted: 02/03/2024] [Indexed: 02/09/2024]
Abstract
The effects of dietary supplementation with Capsicum annuum fruit pericarp powder (CPP) and Capsicum annuum fruit seed powder (CSP) on the health and performance of broiler chickens exposed to aflatoxin B1 (AFB1) was investigated. Four dietary groups were established: CON (control), AFT (0.5 mg/kg AFB1), CPAF (0.5 g/kg CPP and 0.5 mg/kg AFB1), and CSAF (0.5 g/kg CSP and 0.5 mg/kg AFB1). The AFT group shows a significant (P < 0.05) reduction in the relative growth rate compared to CON, CPAF, and CSAF. In contrast, the latter two groups exhibit growth rates similar (P > 0.05) to CON. Additionally, immunoglobulin levels (IgG, IgM, and IgA) in the AFT group are significantly (P < 0.05) lower compared to the other treatment groups. Serum interleukin-6 levels in the CPAF and CSAF groups were similar (P > 0.05) to CON but higher (P < 0.05) than in AFT. Tumor necrosis factor-alpha levels were elevated (P < 0.05) in AFT compared to the other treatment groups. Interferon-gamma concentrations in AFT were significantly (P < 0.05) lower than in the other treatment groups. The liver histology reveals that the AFT treatment group has periportal hepatic inflammation. In contrast, the CPAF and CSAF treatment groups exhibit normal hepatic microanatomy. In conclusion, 0.5 g/kg CPAF dietary supplementation may help to ameliorate the adverse effects of AFB1 exposure on broiler chicken health, specifically the growth, immune parameters and liver histology.
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Affiliation(s)
| | - Simeon O Ayodele
- Department of Agricultural Technology, The Federal Polytechnic, Ado Ekiti, Nigeria
| | - Deborah A Oloruntola
- Department of Medical Laboratory Science, University of Medical Sciences, Ondo City, Nigeria
| | | | - Andrew B Falowo
- Department of Animal Science, Adekunle Ajasin University, Akungba Akoko, Nigeria
| | - Victor O Akinduro
- Department of Animal Science, Osun State University, Osogbo, Nigeria
| | - Francis A Gbore
- Department of Animal Science, Adekunle Ajasin University, Akungba Akoko, Nigeria
| | - Olufemi A Adu
- Department of Animal Production and Health, The Federal University of Technology, Akure. Nigeria
| | - Johnson O Agbede
- Department of Animal Production and Health, The Federal University of Technology, Akure. Nigeria
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Chapman-Lopez TJ, Funderburk LK, Heileson JL, Wilburn DT, Koutakis P, Gallucci AR, Forsse JS. Effects of L-Leucine Supplementation and Resistance Training on Adipokine Markers in Untrained Perimenopausal and Postmenopausal Women. J Strength Cond Res 2024; 38:526-532. [PMID: 38088883 DOI: 10.1519/jsc.0000000000004661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
ABSTRACT Chapman-Lopez, TJ, Funderburk, LK, Heileson, JL, Wilburn, DT, Koutakis, P, Gallucci, AR, and Forsse, JS. Effects of L-leucine supplementation and resistance training on adipokine markers in untrained perimenopausal and postmenopausal women. J Strength Cond Res 38(3): 526-532, 2024-This study examined the effects of supplementing 5 g of leucine compared with a placebo during a 10-week resistance training program on body composition parameters and adipokine concentrations in untrained, perimenopausal and postmenopausal women. Thirty-five women were randomly assigned to 2 groups-leucine (LEU, n = 17) and placebo (PLC, n = 18)-in a double-blind, placebo-controlled trial. Each group consumed the supplement or placebo every day and completed a resistance training program for 10 weeks. Using 3-day food records, a diet was assessed before the intervention and after its cessation. Body composition was assessed preintervention and postintervention using dual-energy x-ray absorptiometry. Moreover, the concentrations of adipokines, such as adiponectin, visfatin, leptin, and monocyte chemoattractant protein-1 (MCP-1), were assessed preintervention and postintervention. Both groups showed an increase in visceral adipose tissue (VAT) area ( p = 0.030) and fat-free mass (FFM; p = 0.023). There were significant group differences in concentrations of visfatin ( p = 0.020) and leptin ( p = 0.038) between the PLC and LEU groups. Visfatin displayed higher concentrations in the PLC group and leptin displayed higher concentrations in the LEU group. In addition, there were significant decreases in adiponectin concentrations for both groups (LEU: 652 ± 513 to 292 ± 447 pg·ml -1 ; PLC: 584 ± 572 to 245 ± 356 pg·ml -1 , p = 0.002) and MCP-1 only decreased in the PLC group (253 ± 119 to 206 ± 106 pg·ml -1 , p = 0.004). There were significant decreases in adiponectin concentrations in both groups and a decrease in MCP-1 concentrations in the PLC group. These decreases may be due to both adipokines possible relationship with VAT area. However, it is not known whether leucine has underlying properties that hinder changes in MCP-1 concentrations.
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Affiliation(s)
- Tomas J Chapman-Lopez
- Integrated Laboratory of Exercise, Nutrition, and Renal Vascular Research, Department of Health Human Performance and Recreation, Baylor University, Waco, Texas
| | - LesLee K Funderburk
- Integrated Laboratory of Exercise, Nutrition, and Renal Vascular Research, Department of Health Human Performance and Recreation, Baylor University, Waco, Texas
- Human Sciences and Design, Baylor University, Waco, Texas
| | - Jeffery L Heileson
- Integrated Laboratory of Exercise, Nutrition, and Renal Vascular Research, Department of Health Human Performance and Recreation, Baylor University, Waco, Texas
- Nutrition Services Division, Walter Reed National Military Medical Center, Bethesda, Maryland; and
| | - Dylan T Wilburn
- Integrated Laboratory of Exercise, Nutrition, and Renal Vascular Research, Department of Health Human Performance and Recreation, Baylor University, Waco, Texas
| | | | - Andrew R Gallucci
- Integrated Laboratory of Exercise, Nutrition, and Renal Vascular Research, Department of Health Human Performance and Recreation, Baylor University, Waco, Texas
| | - Jeffrey S Forsse
- Integrated Laboratory of Exercise, Nutrition, and Renal Vascular Research, Department of Health Human Performance and Recreation, Baylor University, Waco, Texas
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Jimoh OA, Oyeyemi BF, Oyeyemi WA, Ayodele SO, Okin-Aminu HO, Ayodele AD, Faniyi TO, Nwachukwu CU. Herbal inclusions ameliorate effect of heat stress on haematology, proinflammatory cytokines, adipokines and oxidative stress of weaned rabbit does in humid tropics. J Anim Physiol Anim Nutr (Berl) 2024; 108:55-63. [PMID: 37526207 DOI: 10.1111/jpn.13864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/05/2023] [Accepted: 07/11/2023] [Indexed: 08/02/2023]
Abstract
A study was designed to evaluate the effect of Moringa oleifera, Phyllanthus amarus and Viscum album leaf meal as herbal inclusions to alleviate the detrimental outcomes of heat stress in weaned female rabbits. Forty (40) weaned rabbit does (527.99 ± 10.35 g; 28 days old) were randomly allotted to four dietary groups consisting of Diet 1(control diet; without leaf meal), Diets 2 (supplemented with 10% V. album); 3 (supplemented with 10% M. oleifera) and 4 (supplemented with 10% P. amarus) in an 84 days trial at the peak of heat stress in Southwest Nigeria. At the end of the trial, blood samples were collected to assess physiological responses and oxidative status of the rabbit does. The results obtained revealed that rabbit does were exposed to heat stress; rabbit does fed control diet had higher leucocyte and neutrophil/lymphocyte ratio compared to rabbit does fed on herbal inclusions. The herbal inclusions enhanced oxidative stability of rabbit does by lowering lipid peroxidation and enhancing antioxidant activities during heat stress conditions. Rabbit does fed control-based diet had significantly higher heat shock protein 70, leptin and adiponectin compared to rabbit does on M. oleifera, P. amarus and V. album supplemented diets. The herbal inclusions tend to suppress proinflammatory cytokines in rabbit does during heat stress condition. In conclusion, the herbal inclusions suppress inflammation, adipokines and promotes oxidative stability of rabbit does exposed to heat stress conditions.
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Affiliation(s)
- Olatunji A Jimoh
- Department of Agricultural Technology, The Federal Polytechnic Ado-Ekiti, Ado Ekiti, Ekiti State, Nigeria
| | - Bolaji F Oyeyemi
- Department of Science Technology, The Federal Polytechnic Ado-Ekiti, Ado Ekiti, Ekiti State, Nigeria
| | - Wahab A Oyeyemi
- Department of Physiology, Osun State University Oshogbo, Osogbo, Osun State, Nigeria
| | - Simeon O Ayodele
- Department of Agricultural Technology, The Federal Polytechnic Ado-Ekiti, Ado Ekiti, Ekiti State, Nigeria
| | - Hafsat O Okin-Aminu
- Animal Science Department, Ahmadu Bello University, Zaria, Kaduna State, Nigeria
| | - Ayoola D Ayodele
- Department of Agricultural and Industrial Technology, Babcock University, Ilishan Remo, Ogun State, Nigeria
| | - Tolulope O Faniyi
- Department of Crop and Animal Science, Ajayi Crowther University, Oyo, Oyo State, Nigeria
| | - Chinwe Uchechi Nwachukwu
- Department of Agricultural Science Education, School of Vocational and Technical Education, Alvan Ikoku Federal College of Education, Owerri, Imo State, Nigeria
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Yan Z, Cao X, Wang C, Liu S, Li Y, Lu G, Yan W, Guo R, Zhao D, Cao J, Xu Y. C1q/tumor necrosis factor-related protein-3 improves microvascular endothelial function in diabetes through the AMPK/eNOS/NO· signaling pathway. Biochem Pharmacol 2022; 195:114745. [PMID: 34454930 DOI: 10.1016/j.bcp.2021.114745] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 08/06/2021] [Accepted: 08/24/2021] [Indexed: 02/05/2023]
Abstract
The repair of vascular endothelial cell dysfunction is an encouraging approach for the treatment of vascular complications associated with diabetes. It has been demonstrated that members of C1q/tumor necrosis factor-related protein (CTRP) family may improve endothelial function. Nevertheless, the protective properties of CTRPs in diabetic microvascular complications continue to be mostly unknown. Here, we demonstrate that the C1q-like globular domain of CTRP3, CTRP5, and CTRP9 (gCTRP3, 5, 9) exerted a vasorelaxant effect on the microvasculature, of which gCTRP3 was the most powerful one. In a murine model of type 2 diabetes mellitus, serum gCTRP3 level and endothelial function decreased markedly compared with controls. Two weeks of gCTRP3 treatment (0.5 μg/g/d) enhanced endothelium-dependent relaxation in microvessels, increased nitric oxide (NO·) production, and reduced retinal vascular leakage. In addition, Western blotting in human retinal microvascular endothelial cells indicated that gCTRP3 triggered AMP-activated protein kinase-α (AMPKα), hence increasing the endothelial NO synthase (eNOS) level and NO· production. In addition, incubation with gCTRP3 in vitro ameliorated the endothelial dysfunction induced by high glucose in the branch of the mesenteric artery. Blockade of either eNOS or AMPKα completely abolished the effects of gCTRP3 described above. Taken together, we demonstrate for the first time that gCTRP3 improves impaired vasodilatation of microvasculature in diabetes by ameliorating endothelial cell function through the AMPK/eNOS/NO· signaling pathway. This finding may suggest an effective intervention against diabetes-associated microvascular complications.
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Affiliation(s)
- Zheyi Yan
- Department of Psychiatry, First Hospital of Shanxi Medical University, Taiyuan, China; Department of Ophthalmology, First Hospital of Shanxi Medical University, Taiyuan, China; Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA, United States; Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, China
| | - Xiaoming Cao
- Department of Orthopedics, Shanxi Medical University Second Affiliated Hospital, Taiyuan, China
| | - Chunfang Wang
- Department of Ophthalmology, First Hospital of Shanxi Medical University, Taiyuan, China
| | - Sha Liu
- Department of Psychiatry, First Hospital of Shanxi Medical University, Taiyuan, China
| | - Yanjie Li
- Department of Ophthalmology, First Hospital of Shanxi Medical University, Taiyuan, China
| | - Gan Lu
- Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA, United States; Laboratory of Emergency Medicine, Department of Emergency Medicine, Sichuan University West China Hospital, Chengdu, China
| | - Wenjun Yan
- Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA, United States; Department of Cardiology, Xijing Hospital, Xian, China
| | - Rui Guo
- Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA, United States; Morphology Laboratory, Shanxi Medical University, Taiyuan, China
| | - Dajun Zhao
- Department of Emergency Medicine, Thomas Jefferson University, Philadelphia, PA, United States; Department of Cardiac Surgery, Zhongshan Hospital Fudan University, Shanghai, China
| | - Jimin Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, China
| | - Yong Xu
- Department of Psychiatry, First Hospital of Shanxi Medical University, Taiyuan, China.
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Tsai YW, Fu SH, Dong JL, Chien MW, Liu YW, Hsu CY, Sytwu HK. Adipokine-Modulated Immunological Homeostasis Shapes the Pathophysiology of Inflammatory Bowel Disease. Int J Mol Sci 2020; 21:ijms21249564. [PMID: 33334069 PMCID: PMC7765468 DOI: 10.3390/ijms21249564] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 12/07/2020] [Accepted: 12/13/2020] [Indexed: 12/11/2022] Open
Abstract
Inflammatory colon diseases, which are a global health concern, include a variety of gastrointestinal tract disorders, such as inflammatory bowel disease and colon cancer. The pathogenesis of these colon disorders involves immune alterations with the pronounced infiltration of innate and adaptive immune cells into the intestines and the augmented expression of mucosal pro-inflammatory cytokines stimulated by commensal microbiota. Epidemiological studies during the past half century have shown that the proportion of obese people in a population is associated with the incidence and pathogenesis of gastrointestinal tract disorders. The advancement of understanding of the immunological basis of colon disease has shown that adipocyte-derived biologically active substances (adipokines) modulate the role of innate and adaptive immune cells in the progress of intestinal inflammation. The biomedical significance in immunological homeostasis of adipokines, including adiponectin, leptin, apelin and resistin, is clear. In this review, we highlight the existing literature on the effect and contribution of adipokines to the regulation of immunological homeostasis in inflammatory colon diseases and discuss their crucial roles in disease etiology and pathogenesis, as well as the implications of these results for new therapies in these disorders.
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Affiliation(s)
- Yi-Wen Tsai
- Department of Family Medicine, Chang Gung Memorial Hospital, Keelung, No. 222, Maijin Road, Keelung 204, Taiwan;
- College of Medicine, Chang-Gung University, No. 259, Wenhua 1st Rd., Guishan Dist., Taoyuan City 333, Taiwan
- Graduate Institute of Medical Sciences, National Defense Medical Center, No. 161, Section 6, Min Chuan East Road, Neihu, Taipei 114, Taiwan
| | - Shin-Huei Fu
- Department and Graduate Institute of Microbiology and Immunology, National Defense Medical Center, No. 161, Section 6, Min Chuan East Road, Neihu, Taipei 114, Taiwan; (S.-H.F.); (M.-W.C.)
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, No. 35, Keyan Road, Zhunan, Miaoli 350, Taiwan; (J.-L.D.); (Y.-W.L.)
| | - Jia-Ling Dong
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, No. 35, Keyan Road, Zhunan, Miaoli 350, Taiwan; (J.-L.D.); (Y.-W.L.)
| | - Ming-Wei Chien
- Department and Graduate Institute of Microbiology and Immunology, National Defense Medical Center, No. 161, Section 6, Min Chuan East Road, Neihu, Taipei 114, Taiwan; (S.-H.F.); (M.-W.C.)
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, No. 35, Keyan Road, Zhunan, Miaoli 350, Taiwan; (J.-L.D.); (Y.-W.L.)
| | - Yu-Wen Liu
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, No. 35, Keyan Road, Zhunan, Miaoli 350, Taiwan; (J.-L.D.); (Y.-W.L.)
- Graduate Institute of Life Sciences, National Defense Medical Center, No. 161, Section 6, Min Chuan East Road, Neihu, Taipei 114, Taiwan
- Molecular Cell Biology, Taiwan International Graduate Program, No. 128, Academia Road, Section 2, Nankang, Taipei 115, Taiwan
| | - Chao-Yuan Hsu
- Department and Graduate Institute of Microbiology and Immunology, National Defense Medical Center, No. 161, Section 6, Min Chuan East Road, Neihu, Taipei 114, Taiwan; (S.-H.F.); (M.-W.C.)
- Graduate Institute of Life Sciences, National Defense Medical Center, No. 161, Section 6, Min Chuan East Road, Neihu, Taipei 114, Taiwan
- Correspondence: (C.-Y.H.); (H.-K.S.)
| | - Huey-Kang Sytwu
- Graduate Institute of Medical Sciences, National Defense Medical Center, No. 161, Section 6, Min Chuan East Road, Neihu, Taipei 114, Taiwan
- Department and Graduate Institute of Microbiology and Immunology, National Defense Medical Center, No. 161, Section 6, Min Chuan East Road, Neihu, Taipei 114, Taiwan; (S.-H.F.); (M.-W.C.)
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, No. 35, Keyan Road, Zhunan, Miaoli 350, Taiwan; (J.-L.D.); (Y.-W.L.)
- Graduate Institute of Life Sciences, National Defense Medical Center, No. 161, Section 6, Min Chuan East Road, Neihu, Taipei 114, Taiwan
- Correspondence: (C.-Y.H.); (H.-K.S.)
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Abstract
Central and peripheral mechanisms are both required for proper control of energy homeostasis. Among circulating plasma proteins, C1q/TNF-related proteins (CTRPs) have recently emerged as important regulators of sugar and fat metabolism. CTRP4, expressed in brain and adipose tissue, is unique among the family members in having two tandem globular C1q domains. We previously showed that central administration of recombinant CTRP4 suppresses food intake, suggesting a central nervous system role in regulating ingestive physiology. Whether this effect is pharmacological or physiological remains unclear. We used a loss-of-function knockout (KO) mouse model to clarify the physiological role of CTRP4. Under basal conditions, CTRP4 deficiency increased serum cholesterol levels and impaired glucose tolerance in male but not female mice fed a control low-fat diet. When challenged with a high-fat diet, male and female KO mice responded differently to weight gain and had different food intake patterns. On an obesogenic diet, male KO mice had similar weight gain as wild-type littermates. When fed ad libitum, KO male mice had greater meal number, shorter intermeal interval, and reduced satiety ratio. Female KO mice, in contrast, had lower body weight and adiposity. In the refeeding period following food deprivation, female KO mice had significantly higher food intake due to longer meal duration and reduced satiety ratio. Collectively, our data provide genetic evidence for a sex-dependent physiological role of CTRP4 in modulating food intake patterns and systemic energy metabolism.
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Affiliation(s)
- Dylan C Sarver
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ashley N Stewart
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Susana Rodriguez
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hannah C Little
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Susan Aja
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - G William Wong
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Binti Kamaruddin NA, Fong LY, Tan JJ, Abdullah MNH, Singh Cheema M, Bin Yakop F, Yong YK. Cytoprotective Role of Omentin Against Oxidative Stress-Induced Vascular Endothelial Cells Injury. Molecules 2020; 25:E2534. [PMID: 32485974 PMCID: PMC7321413 DOI: 10.3390/molecules25112534] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/23/2020] [Accepted: 04/27/2020] [Indexed: 01/16/2023] Open
Abstract
Endothelial cell injury caused by reactive oxygen species (ROS) plays a critical role in the pathogenesis of cardiovascular diseases. Omentin, an adipocytokine that is abundantly expressed in visceral fat tissue, has been reported to possess anti-inflammatory and antidiabetic properties. However, endothelial protective effects of omentin against oxidative stress remain unclear. This study aimed to evaluate the protective effect of omentin against hydrogen peroxide (H2O2)-induced cell injury in human umbilical vein endothelial cells (HUVECs). Cytotoxicity and cytoprotective effects of omentin were evaluated using 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The apoptotic activity of HUVECs was detected using Annexin-V/PI and Hoechst 33258 staining methods. Antioxidant activity of omentin was evaluated by measuring both reactive oxygen species (ROS) levels and glutathione peroxidase (GPx) activity. No cytotoxicity effect was observed in HUVECs treated with omentin alone at concentrations of 150 to 450 ng/ml. MTT assay showed that omentin significantly prevented the cell death induced by H2O2 (p < 0.001). Hoechst staining and flow cytometry also revealed that omentin markedly prevented H2O2-induced apoptosis. Moreover, omentin not only significantly inhibited ROS production (p < 0.01) but also significantly (p < 0.01) increased GPx activity in HUVECs. In conclusion, our data suggest that omentin may protect HUVECs from injury induced by H2O2.
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Affiliation(s)
- Nur Aqilah Binti Kamaruddin
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia;
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, Cheras 56000, Kuala Lumpur, Malaysia
| | - Lai Yen Fong
- Department of Pre-clinical Sciences, Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, Kajang 43000, Selangor, Malaysia;
| | - Jun Jie Tan
- Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, Kepala Batas 13200, Penang, Malaysia;
| | - Muhammad Nazrul Hakim Abdullah
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia; (M.N.H.A.); (M.S.C.)
| | - Manraj Singh Cheema
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia; (M.N.H.A.); (M.S.C.)
| | - Fahmi Bin Yakop
- Department of Basic Sciences and Oral Biology, Faculty of Dentistry, Universiti Sains Islam Malaysia, Kuala Lumpur 55100, Malaysia;
| | - Yoke Keong Yong
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia;
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Kastl SP, Katsaros KM, Krychtiuk KA, Jägersberger G, Kaun C, Huber K, Wojta J, Speidl WS. The adipokine vaspin is associated with decreased coronary in-stent restenosis in vivo and inhibits migration of human coronary smooth muscle cells in vitro. PLoS One 2020; 15:e0232483. [PMID: 32392256 PMCID: PMC7213727 DOI: 10.1371/journal.pone.0232483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 04/15/2020] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Percutaneous coronary intervention represents the most important treatment modality of coronary artery stenosis. In-stent restenosis (ISR) is still a limitation for the long-term outcome despite the introduction of drug eluting stents. It has been shown that adipokines directly influence vessel wall homeostasis by influencing the function of endothelial cells and arterial smooth muscle cells. Visceral adipose tissue-derived serpin vaspin was recently identified as a member of serine protease inhibitor family and serveral studies could demonstrate a relation to metabolic diseases. The aim of this study was to investigate a role of vaspin in the development of in-stent restenosis in vivo and on migration of smooth muscle cells and endothelial cells in vitro. METHODS We studied 85 patients with stable coronary artery disease who underwent elective and successful PCI with implatation of drug eluting stents. Blood samples were taken directly before PCI. Vaspin plasma levels were measured by specific ELISA. ISR was evaluated eight months later by coronary angiography. Human coronary artery smooth muscle cells (HCASMC) and human umbilical vein endothelial cells (HUVEC) migration was analyzed by an in-vitro migration assay with different concentrations (0.004ng/mL up to 40ng/mL) of vaspin as well as by an scratch assay. For proliferation an impedance measurement with specialiced E-Plates was performed. RESULTS During the follow up period, 14 patients developed ISR. Patients with ISR had significantly lower vaspin plasma levels compared to patients without ISR (0.213 ng/ml vs 0.382 ng/ml; p = 0.001). In patients with plasma vaspin levels above 1.35 ng/ml we could not observe any restenosis. There was also a significant correlation of plasma vaspin levels and late lumen loss in the stented coronary segments. Further we could demonstrate that vaspin nearly abolishes serum induced migration of HCASMC (100% vs. 9%; p<0.001) in a biphasic manner but not migration of HUVEC. Proliferation of HCASMC and HUVEC was not modulated by vaspin treatment. CONCLUSION We were able to show that the adipokine vaspin selectively inhibits human coronary SMC migration in vitro and has no effect on HUVEC migration. Vaspin had no effect on proliferation of HUVEC which is an important process of the healing of the stented vessel. In addition, the occurrence of ISR after PCI with implantation of drug eluting stents was significantly associated with low vaspin plasma levels before intervention. Determination of vaspin plasma levels before PCI might be helpful in the identification of patients with high risk for development of ISR after stent implantation. In addition, the selective effects of vaspin on smooth muscle cell migration could potentially be used to reduce ISR without inhibition of re-endothelialization of the stented segment.
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Affiliation(s)
- Stefan P. Kastl
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
- The Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria
| | - Katharina M. Katsaros
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
- The Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria
| | - Konstantin A. Krychtiuk
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
- The Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria
| | | | - Christoph Kaun
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Kurt Huber
- Department of Medicine (Cardiology and Emergency Medicine), Wilhelminenhospital, Vienna, Austria
| | - Johann Wojta
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
- The Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria
- * E-mail:
| | - Walter S. Speidl
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
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Chen L, Qin L, Liu X, Meng X. CTRP3 Alleviates Ox-LDL-Induced Inflammatory Response and Endothelial Dysfunction in Mouse Aortic Endothelial Cells by Activating the PI3K/Akt/eNOS Pathway. Inflammation 2020; 42:1350-1359. [PMID: 30887395 DOI: 10.1007/s10753-019-00996-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
C1q/tumor necrosis factor-related protein-3 (CTRP3) is a novel, certified, adipokine that beneficially regulates metabolism and inflammation in the cardiovascular system. Atherosclerotic plaque rupturing and secondary thrombosis cause vascular disorders, such as myocardial infarction and unstable angina. However, the underlying role of CTRP3 in atherosclerosis remains unclear. In this study, we aimed to elucidate whether and how CTRP3 ameliorates inflammation and endothelial dysfunction caused by oxidized low-density lipoprotein (ox-LDL). We first confirmed that CTRP3 expression was inhibited in ApoE-/- mice, compared to normal mice. Then, pcDNA-CTRP3 and siCTRP3 were transfected into mouse aortic endothelial cells after ox-LDL stimulation, and we observed that enhanced CTRP3 remarkably downregulated CRP, TNF-α, IL-6, CD40, and CD40L. We also observed that overexpression of CTRP3 elevated cell activity and decreased lactated hydrogenase release, accompanied by a marked reduction in cell apoptosis induced by ox-LDL. Meanwhile, overexpressed CTRP3 caused a decrease in Ang II, ICAM-1, and VCAM-1 expression, and it restored the balance between ET-1 and NO. Mechanism analysis confirmed that incremental CTRP3 upregulated p-PI3K, p-Akt, and p-eNOS expression, indicating that CTRP3 facilitated activation of the PI3K/Akt/eNOS pathway. On the contrary, siCTRP3 exerted the opposite effect to this activation. Blocking these pathways using LY294002 or L-NAME attenuated the protective role of CTRP3. Overall, these results suggest that CTRP3 can efficiently inhibit the inflammatory response and endothelial dysfunction induced by ox-LDL in mouse aortic endothelial cells, perhaps by activating the PI3K/Akt/eNOS pathway, indicating a promising strategy against atherosclerosis.
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Affiliation(s)
- Lei Chen
- Department of Critical Care Medicine, Gansu Provincial Hospital of TCM, No. 418, Guazhou Road, Qilihe District, Lanzhou City, 730050, Gansu, People's Republic of China.
| | - Lijun Qin
- Department of Cardiology, Lanzhou University Second Hospital, Lanzhou, 730030, Gansu, People's Republic of China
| | - Xin Liu
- Department of Rheumatic Osteopathology, Gansu Provincial Hospital of TCM, Lanzhou, 730050, Gansu, People's Republic of China
| | - Xiangyun Meng
- Central Laboratory, Gansu Provincial Hospital of TCM, Lanzhou, 730050, Gansu, People's Republic of China
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10
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Abstract
BACKGROUND Increasing prevalence of obesity requires the investigation of respective comorbidities, including tumor diseases like colorectal, renal, post-menopausal breast, prostate cancer, and leukemia. To date, molecular mechanisms of the malignant transformation of these peripheral tissues induced by obesity remain unclear. Adipose tissue secretes factors with hormone-like functions, the adipokines, and is therefore categorized as an endocrine organ. Current research demonstrates the ability of adipose tissue to alter DNA methylation and gene expression in peripheral tissues, probably affecting microRNA (miR) expression. METHODS Literature was analyzed for adipokine-regulated miRs. Many of these adipokine upregulated or downregulated miRs exert either oncogenic or anti-tumoral potential. RESULTS The three selected and analyzed adipokines, adiponectin, leptin, and resistin, induce more strongly oncogenic miRs and simultaneously reduce anti-tumoral miRs than vice versa. This effect is not only true for the pure number of regulated miRs, it is also the case by consideration of the abundance of the respective miR expression based on actual data sets derived from next-generation sequencing. CONCLUSION The link of obesity and cancer is analyzed under the aspect of adipokine-regulated miRs. At the same time the impact of miR abundance is considered as a regulatory variable. This context offers new strategies for tumor therapy and diagnostics.
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Affiliation(s)
- Simon Jasinski-Bergner
- Department of Anatomy and Cell Biology, Faculty of Medicine, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany,
| | - Heike Kielstein
- Department of Anatomy and Cell Biology, Faculty of Medicine, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
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11
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Allegra A, Innao V, Gerace D, Allegra AG, Vaddinelli D, Bianco O, Musolino C. The adipose organ and multiple myeloma: Impact of adipokines on tumor growth and potential sites for therapeutic intervention. Eur J Intern Med 2018; 53:12-20. [PMID: 29859797 DOI: 10.1016/j.ejim.2018.05.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 05/26/2018] [Accepted: 05/28/2018] [Indexed: 02/06/2023]
Abstract
In addition to its capacity to store lipids the adipose tissue is now identified as a real organ with both endocrine and metabolic roles. Preclinical results indicate that modifying adipose tissue and bone marrow adipose tissue (BMAT) could be a successful multiple myeloma (MM) therapy. BMAT interrelates with bone marrow cells and other immune cells, and may influence MM disease progression. The BM adipocytes may have a role in MM progression, bone homing, chemoresistance, and relapse, due to local endocrine, paracrine, or metabolic factors. BM adipocytes isolated from MM subjects have been shown to increase myeloma growth in vitro and may preserve cells from chemotherapy-induced apoptosis. By producing free fatty acids and emitting signaling molecules such as growth factors and adipokines, BM adipocytes are both an energy font and an endocrine signaling factory. This review should suggest future research approaches toward developing novel treatments to target MM by targeting BMAT and its products.
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Affiliation(s)
- Alessandro Allegra
- Division of Hematology, Department of Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Via Consolare Valeria, 90100 Messina, Italy.
| | - Vanessa Innao
- Division of Hematology, Department of Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Via Consolare Valeria, 90100 Messina, Italy
| | - Demetrio Gerace
- Division of Hematology, Department of Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Via Consolare Valeria, 90100 Messina, Italy
| | - Andrea Gaetano Allegra
- Division of Hematology, Department of Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Via Consolare Valeria, 90100 Messina, Italy
| | - Doriana Vaddinelli
- Division of Hematology, Department of Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Via Consolare Valeria, 90100 Messina, Italy
| | - Oriana Bianco
- Division of Hematology, Department of Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Via Consolare Valeria, 90100 Messina, Italy
| | - Caterina Musolino
- Division of Hematology, Department of Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Via Consolare Valeria, 90100 Messina, Italy
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12
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Han F, Zhang Y, Shao M, Mu Q, Jiao X, Hou N, Sun X. C1q/TNF-related protein 9 improves the anti-contractile effects of perivascular adipose tissue via the AMPK-eNOS pathway in diet-induced obese mice. Clin Exp Pharmacol Physiol 2018; 45:50-57. [PMID: 28902432 DOI: 10.1111/1440-1681.12851] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 08/22/2017] [Accepted: 09/05/2017] [Indexed: 02/05/2023]
Abstract
The anti-contractile property of perivascular adipose tissue (PVAT) is abolished through an endothelium-dependent pathway in obesity. C1q/tumor necrosis factor-related protein (CTRP)9 improved endothelial function by promoting endothelium-dependent vasodilatation. The aims of this study were to investigate whether CTRP9 improves the anti-contractile effect of PVAT and protects against PVAT dysfunction in obese mice. The mice were treated with a high-fat diet with or without CTRP9 treatment. Thoracic aortas with or without PVAT (PVAT+ or PVAT-) were prepared, and concentration-dependent responses to phenylephrine were measured. Obese mice showed a significantly increased contractile response, which was suppressed by CTRP9 treatment both with and without PVAT. PVAT significantly reduced the anti-contractile effect in obese mice, which was partially restored by CTRP9 treatment. Treatment of the aortic rings (PVAT+) with inhibitors of AMP protein kinase (AMPK), Akt and endothelial nitric oxide synthase (eNOS) attenuated the beneficial effect of CTRP9 on PVAT. Similar results were observed when we pretreated the aortic rings with CTRP9 ex vivo. CTRP9 significantly enhanced the phosphorylation levels of AMPK, Akt and eNOS, and reduced superoxide production and TNF-α levels in PVAT from obese mice. Our study suggests that CTRP9 enhanced the anti-contractile effect of PVAT and improved PVAT function by activating the AMPK-eNOS pathway in obese mice.
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Affiliation(s)
- Fang Han
- Department of Pathology, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Yang Zhang
- Department of Endocrinology, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Mingxia Shao
- Department of Endocrinology, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Qingjie Mu
- Clinical College, Weifang Medical University, Weifang, China
| | - Xiaotong Jiao
- Department of Endocrinology, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Ningning Hou
- Department of Endocrinology, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Xiaodong Sun
- Department of Endocrinology, Affiliated Hospital of Weifang Medical University, Weifang, China
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13
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Sarmento-Cabral A, L-López F, Luque RM. Adipokines and Their Receptors Are Widely Expressed and Distinctly Regulated by the Metabolic Environment in the Prostate of Male Mice: Direct Role Under Normal and Tumoral Conditions. Endocrinology 2017; 158:3540-3552. [PMID: 28938461 DOI: 10.1210/en.2017-00370] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 08/03/2017] [Indexed: 12/15/2022]
Abstract
Adipose tissue-derived adipokines (i.e., leptin/adiponectin/resistin) play important roles in the regulation of several pathophysiologic processes through the activation of specific receptors. However, although adipokines and their receptors are widely distributed in many tissues and exhibit a clear modulation according to particular metabolic conditions (e.g., obesity and/or fasting), their expression, regulation, and putative action on normal prostate glands (PGs; a hormone-dependent organ tightly regulated by the endocrine-metabolic milieu) are still to be defined. Different in vivo/in vitro models were used to comprehensively characterize the expression pattern and actions of different adipokine systems (i.e., leptin/adiponectin/resistin/receptors) in mouse PGs. Adiponectin, resistin, and adiponectin receptors (1 and 2) and leptin receptor are coexpressed at different levels in PG cells, wherein they are finely regulated under fasting and/or obesity conditions. Furthermore, treatment with different adipokines exerted both homologous and heterologous regulation of specific adipokines/receptor-synthesis and altered the expression of key proliferation and oncogenesis markers (i.e., Ki67/c-Myc/p53) in mouse PG cell cultures, wherein some of these actions might be elicited through extracellular signal-regulated kinase (ERK) activation. Moreover, treatment with leptin, adiponectin, and resistin differentially regulated key functional parameters [i.e., proliferation and migration capacity and/or prostate-specific antigen (PSA) secretion] in human normal and/or tumoral prostate cell lines. Altogether, our data show that various adipokine and receptor systems are differentially expressed in normal PG cells; that their expression is under a complex ligand- and receptor-selective regulation under extreme metabolic conditions; and that they mediate distinctive and common direct actions in normal and tumoral PG cells (i.e., homologous and heterologous regulation of ligand and receptor synthesis, ERK signaling activation, modulation of proliferation markers, proliferation and migration capacity, and PSA secretion), suggesting a relevant role of these systems in the regulation of PG pathophysiology.
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Affiliation(s)
- André Sarmento-Cabral
- Maimonides Institute of Biomedical Research of Cordoba, 14004 Cordoba, Spain
- Reina Sofía University Hospital, 14004 Cordoba, Spain
- Department of Cell Biology, Physiology and Immunology, University of Cordoba, 14004 Cordoba, Spain
- CIBER Physiopathology of Obesity and Nutrition, 14004 Cordoba, Spain
- Internacional Campus of Excellence on Agrifood, 14004 Cordoba, Spain
| | - Fernando L-López
- Maimonides Institute of Biomedical Research of Cordoba, 14004 Cordoba, Spain
- Reina Sofía University Hospital, 14004 Cordoba, Spain
- Department of Cell Biology, Physiology and Immunology, University of Cordoba, 14004 Cordoba, Spain
- CIBER Physiopathology of Obesity and Nutrition, 14004 Cordoba, Spain
- Internacional Campus of Excellence on Agrifood, 14004 Cordoba, Spain
| | - Raúl M Luque
- Maimonides Institute of Biomedical Research of Cordoba, 14004 Cordoba, Spain
- Reina Sofía University Hospital, 14004 Cordoba, Spain
- Department of Cell Biology, Physiology and Immunology, University of Cordoba, 14004 Cordoba, Spain
- CIBER Physiopathology of Obesity and Nutrition, 14004 Cordoba, Spain
- Internacional Campus of Excellence on Agrifood, 14004 Cordoba, Spain
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14
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Savill SA, Leitch HF, Harvey JN, Thomas TH. Inflammatory Adipokines Decrease Expression of Two High Molecular Weight Isoforms of Tropomyosin Similar to the Change in Type 2 Diabetic Patients. PLoS One 2016; 11:e0162908. [PMID: 27649540 PMCID: PMC5029944 DOI: 10.1371/journal.pone.0162908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 08/30/2016] [Indexed: 01/04/2023] Open
Abstract
Cardiovascular disease and cancer are increased in Type 2 diabetes. TPM1 and TPM4 genes encode proteins associated with cardiovascular and neoplastic disease. High (HMW) and low (LMW) molecular weight isoforms from TPM1 and TPM4 are altered in several cancer cells and the 3'UTR of TPM1 mRNA is tumour suppressive. Leukocytes influence cardiovascular and neoplastic disease by immunosurveillance for cancer and by chronic inflammation in Type 2 diabetes and cardiovascular disease. The aim was to determine changes in expression of isoforms from TPM1 and TPM4 genes in leukocytes from Type 2 diabetic patients and to use the leukocyte cell line THP1 to identify possible mediators of changes in the patients. Gene expression was determined by RT-qPCR. In diabetes, expression of HMW isoforms from TPM1 were markedly decreased (0.55 v 1.00; p = 0.019) but HMW isoforms from TPM4 were not significantly different (0.76 v 1.00; p = 0.205). Within individual variance in expression of HMW isoforms was very high. The change in expression in HMW isoforms from TPM1 and TPM4 was replicated in THP1 cells treated with 1 ng/ml TNFα (0.10 and 0.12 v 1.00 respectively) or 10 ng/ml IL-1α (0.17 and 0.14 v 1.00 respectively). Increased insulin or glucose concentrations had no substantial effects on TPM1 or TPM4 expression. Decreased TPM1 mRNA resulted in decreases in HMW protein levels. Expression of HMW isoforms from TPM1 is decreased in Type 2 diabetes. This is probably due to increased levels of inflammatory cytokines TNFα and IL-1α in Type 2 diabetes. Lower levels of TPM1 mRNA reduce tumour suppression and could contribute to increased cancer risk in Type 2 diabetes. Decreased HMW tropomyosin isoforms are associated with cancer. Decreased HMW isoforms give rise to cells that are more plastic, motile, invasive and prone to dedifferentiation resulting in leukocytes that are more invasive but less functionally effective.
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Affiliation(s)
- Stuart A. Savill
- Betsi Cadwaladr University Health Board, Croesnewydd Road, Wrexham, United Kingdom
- * E-mail:
| | - Helen F. Leitch
- Betsi Cadwaladr University Health Board, Croesnewydd Road, Wrexham, United Kingdom
| | - John N. Harvey
- Betsi Cadwaladr University Health Board, Croesnewydd Road, Wrexham, United Kingdom
- School of Medical Sciences, Wrexham Academic Unit, Bangor University, Bangor, United Kingdom
| | - Trevor H. Thomas
- Betsi Cadwaladr University Health Board, Croesnewydd Road, Wrexham, United Kingdom
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15
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Gäde G, Šimek P, Marco HG. A novel adipokinetic peptide from the corpus cardiacum of the primitive caeliferan pygmy grasshopper Tetrix subulata (Caelifera, Tetrigidae). Peptides 2015; 68:43-9. [PMID: 25661310 DOI: 10.1016/j.peptides.2015.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 01/28/2015] [Accepted: 01/28/2015] [Indexed: 11/26/2022]
Abstract
The basal caeliferan family Tetrigidae is investigated to identify neuropeptides belonging to the adipokinetic hormone (AKH) family. The pygmy grasshopper Tetrix subulata contains in its corpus cardiacum two octapeptides as revealed by liquid chromatography coupled to electrospray ionization mass spectrometry. The less abundant peptide is the well-known Schgr-AKH-II (pELNFSTGW amide) which is suggested to be the ancestral AKH of Caelifera and Ensifera. The second peptide, Tetsu-AKH (pEFNFTPGW amide), is novel and quite unusual with its third aromatic residue at position 2. It is thought to be autapomorphic for Caelifera. Tetsu-AKH has hyperlipemic activity in T. subulata and in Schistocerca gregaria.
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Affiliation(s)
- Gerd Gäde
- Department of Biological Sciences, University of Cape Town, Rondebosch ZA-7700, South Africa.
| | - Petr Šimek
- Biology Centre, The Czech Academy of Sciences, CZ-37005 Ceske Budejovice, Czech Republic
| | - Heather G Marco
- Department of Biological Sciences, University of Cape Town, Rondebosch ZA-7700, South Africa
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16
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Abstract
Adipose tissue is not only releasing lipids but also various adipokines that are both dysregulated in the obese state and may contribute to obesity-associated vascular dysfunction and cardiovascular risk. We have previously shown that the combination of adipocyte-conditioned medium (CM) and oleic acid (OA) increases proliferation of human vascular smooth muscle cells (VSMC) in a synergistic way. We identified vascular endothelial growth factor (VEGF) as a component within CM that is responsible for most of the observed effects. In this study, we investigate novel mechanisms that underlie the combined effects of adipokine and oleic acid-induced proliferation of VSMC. Oleic acid leads to significant lipid accumulation in VSMC that is further enhanced by the combined treatment with CM. Accordingly CM stimulates CD36 expression in VSMC while OA is not affecting CD36. Silencing of CD36 was established and prevents lipid accumulation in all tested conditions. CD36 silencing also abrogates CM- and OA-induced proliferation and considerably reduces proliferation induced by the combination of CM and OA. At the same time, VEGF secretion and VEGF-receptor 1 (VEGF-R1) by VSMC was not affected by CD36 silencing. However, VEGF was not able to induce any proliferation in VSMC after CD36 silencing that also blunted VEGF-induced extracellular signal-regulated kinase (ERK) activation. Finally, combined silencing of CD36 together with a blocking antibody against VEGF prevented most of CMOA-induced proliferation. In conclusion, our results demonstrate that CD36 is mediating CM-induced proliferation of VSMC. Induction of CD36 by adipokines enhances the response of VSMC towards VEGF and OA.
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MESH Headings
- Adipocytes/cytology
- Adipocytes/metabolism
- Adipokines/metabolism
- Adipokines/pharmacology
- Adipose Tissue/cytology
- Adipose Tissue/metabolism
- Adult
- Antibodies, Neutralizing/pharmacology
- CD36 Antigens/antagonists & inhibitors
- CD36 Antigens/genetics
- CD36 Antigens/metabolism
- Cell Proliferation/drug effects
- Coronary Vessels/cytology
- Coronary Vessels/drug effects
- Coronary Vessels/metabolism
- Culture Media, Conditioned/chemistry
- Culture Media, Conditioned/pharmacology
- Female
- Gene Expression Regulation
- Humans
- Male
- Middle Aged
- Mitogen-Activated Protein Kinase 1/genetics
- Mitogen-Activated Protein Kinase 1/metabolism
- Mitogen-Activated Protein Kinase 3/genetics
- Mitogen-Activated Protein Kinase 3/metabolism
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/cytology
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Oleic Acid/pharmacology
- Primary Cell Culture
- RNA, Small Interfering/genetics
- RNA, Small Interfering/metabolism
- Signal Transduction
- Vascular Endothelial Growth Factor A/antagonists & inhibitors
- Vascular Endothelial Growth Factor A/genetics
- Vascular Endothelial Growth Factor A/metabolism
- Vascular Endothelial Growth Factor Receptor-1/genetics
- Vascular Endothelial Growth Factor Receptor-1/metabolism
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Affiliation(s)
- Raphaela Schlich
- Paul-Langerhans-Group for Integrative Physiology, German Diabetes Center , Düsseldorf , Germany
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17
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Gołębiowski M, Cerkowniak M, Urbanek A, Słocińska M, Rosiński G, Stepnowski P. Adipokinetic hormone induces changes in the fat body lipid composition of the beetle Zophobas atratus. Peptides 2014; 58:65-73. [PMID: 24905623 DOI: 10.1016/j.peptides.2014.05.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 05/24/2014] [Accepted: 05/26/2014] [Indexed: 12/17/2022]
Abstract
In insects, neuropeptide adipokinetic hormone (AKH) released from the corpora cardiaca mobilizes lipids and carbohydrates in the fat body. We examined the developmental differences in the action of Tenmo-AKH, a bioanalogue belonging to the adipokinetic/hypertrahelosemic family (AKH/HrTH), on the lipid composition of larval and pupal fat bodies in the beetle Zophobas atratus. Tenmo-AKH was administered to the beetle larvae and pupae either as a single dose or as two doses of 20 pmol during a 24h interval. Extracts of fat bodies were used to analyse the lipid composition by gas chromatography (GC) combined with mass spectrometry (GC-MS). Control extracts were analyzed using the same method. Fatty acids (FA) and fatty acid methyl esters (FAME) were the most abundant compounds in the fat bodies from both developmental stages. We observed significant differences in their concentrations following hormonal treatment. Tenmo-AKH also induced a distinct increase in larval sterols, fatty alcohols and benzoic acid.
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Affiliation(s)
- Marek Gołębiowski
- Laboratory of Natural Products Analysis, Department of Environmental Analysis, Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdansk, ul. Wita Stwosza 63, 80-308, Poland.
| | - Magdalena Cerkowniak
- Laboratory of Natural Products Analysis, Department of Environmental Analysis, Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdansk, ul. Wita Stwosza 63, 80-308, Poland
| | - Aleksandra Urbanek
- Department of Invertebrate Zoology and Parasitology, University of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland
| | - Małgorzata Słocińska
- Department of Animal Physiology and Development, Adam Mickiewicz University, Umultowska 89, 61-614 Poznan, Poland
| | - Grzegorz Rosiński
- Department of Animal Physiology and Development, Adam Mickiewicz University, Umultowska 89, 61-614 Poznan, Poland
| | - Piotr Stepnowski
- Laboratory of Natural Products Analysis, Department of Environmental Analysis, Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdansk, ul. Wita Stwosza 63, 80-308, Poland
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18
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Lin S, Ma S, Lu P, Cai W, Chen Y, Sheng J. Effect of CTRP3 on activation of adventitial fibroblasts induced by TGF-β1 from rat aorta in vitro. Int J Clin Exp Pathol 2014; 7:2199-2208. [PMID: 24966928 PMCID: PMC4069903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 04/10/2014] [Indexed: 06/03/2023]
Abstract
CTRP3, discovered as novel adipokines, is a member of the C1q tumor necrosis factor (TNF) related protein (CTRP) super-family. CTRP3 is found to function as adipokines that display diverse biological activities in metabolic and cardiovascular diseases. Recent study demonstrated that CTRP3 was protective against pathological cardiac remodeling in mice. Nevertheless, the effect of CTRP3 on vascular remodeling remains undefined. Our present study aimed to explore the effects of adipokine CTRP3 on the activation of adventitial fibroblasts (AFs) induced by TGF-β1. Immunofluorescent staining, real-time PCR and Western blot were conducted to evaluate the expression of α-smooth muscle-actin (α-SMA) and collagen I. The expression of CTGF was evaluated by enzymelinked immunosorbent assay (ELISA), while the proliferation and migration of adventitial fibroblasts were detected by using cell counting kit-8 (CCK-8) assay and Transwell technique, respectively. Functional analysis showed that CTRP3 inhibited TGF-β1 inducing AFs phenotypic conversion, collagen synthesis, proliferation and migration. The secretion of CTGF was also inhibited by CTRP3. Our findings suggest that CTRP3 may be beneficial to the prevention of cardiovascular diseases and provide a promising therapeutic strategy to attenuate vascular remodeling.
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Affiliation(s)
- Shaohui Lin
- Department of Geriatrics, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai, China
| | - Shaojun Ma
- Department of Geriatrics, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai, China
| | - Ping Lu
- Department of Geriatrics, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai, China
| | - Wenwei Cai
- Department of Geriatrics, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai, China
| | - Yi Chen
- Department of Geriatrics, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai, China
| | - Jing Sheng
- Department of Geriatrics, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai, China
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19
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Xia M, Boini KM, Abais JM, Xu M, Zhang Y, Li PL. Endothelial NLRP3 inflammasome activation and enhanced neointima formation in mice by adipokine visfatin. Am J Pathol 2014; 184:1617-28. [PMID: 24631027 DOI: 10.1016/j.ajpath.2014.01.032] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 01/22/2014] [Accepted: 01/30/2014] [Indexed: 12/25/2022]
Abstract
Inflammasomes serve as an intracellular machinery to initiate inflammatory response to various danger signals. The present study tested whether an inflammasome centered on nucleotide oligomerization domain-like receptor protein 3 (NLRP3) triggers endothelial inflammatory response to adipokine visfatin, a major injurious adipokine during obesity. NLRP3 inflammasome components were abundantly expressed in cultured mouse microvascular endothelial cells, including NLRP3, apoptosis-associated speck-like protein, and caspase-1. These NLRP3 inflammasome molecules could be aggregated to form an inflammasome complex on stimulation of visfatin, as shown by fluorescence confocal microscopy and size exclusion chromatography. Correspondingly, visfatin significantly increased caspase-1 activity and IL-1β release in microvascular endothelial cells, indicating an activation of NLRP3 inflammasomes. In animal experiments, direct infusion of visfatin in mice with partially ligated left carotid artery were found to have significantly increased neointimal formation, which was correlated with increased NLRP3 inflammasome formation and IL-1β production in the intima. Further, visfatin-induced neointimal formation, endothelial inflammasome formation, and IL-1β production in mouse partially ligated left carotid artery were abolished by caspase-1 inhibition, local delivery of apoptosis-associated speck-like protein shRNA or deletion of the ASC gene. In conclusion, the formation and activation of NLRP3 inflammasomes by adipokine visfatin may be an important initiating mechanism to turn on the endothelial inflammatory response leading to arterial inflammation and endothelial dysfunction in mice during early stage obesity.
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Affiliation(s)
- Min Xia
- Department of Pharmacology & Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, Virginia
| | - Krishna M Boini
- Department of Pharmacology & Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, Virginia
| | - Justine M Abais
- Department of Pharmacology & Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, Virginia
| | - Ming Xu
- Department of Pharmacology & Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, Virginia
| | - Yang Zhang
- Department of Pharmacology & Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, Virginia
| | - Pin-Lan Li
- Department of Pharmacology & Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, Virginia.
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Huebner L, Engeli S, Wrann CD, Goudeva L, Laue T, Kielstein H. Human NK cell subset functions are differentially affected by adipokines. PLoS One 2013; 8:e75703. [PMID: 24098717 PMCID: PMC3787100 DOI: 10.1371/journal.pone.0075703] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 08/20/2013] [Indexed: 01/03/2023] Open
Abstract
Background Obesity is a risk factor for various types of infectious diseases and cancer. The increase in adipose tissue causes alterations in both adipogenesis and the production of adipocyte-secreted proteins (adipokines). Since natural killer (NK) cells are the host’s primary defense against virus-infected and tumor cells, we investigated how adipocyte-conditioned medium (ACM) affects functions of two distinct human NK cell subsets. Methods Isolated human peripheral blood mononuclear cells (PBMCs) were cultured with various concentrations of human and murine ACM harvested on two different days during adipogenesis and analyzed by fluorescent-activated cell sorting (FACS). Results FACS analyses showed that the expression of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), granzyme A (GzmA) and interferon (IFN)-γ in NK cells was regulated in a subset-specific manner. ACM treatment altered IFN-γ expression in CD56dim NK cells. The production of GzmA in CD56bright NK cells was differentially affected by the distinct adipokine compositions harvested at different states of adipogenesis. Comparison of the treatment with either human or murine ACM revealed that adipokine-induced effects on NK cell expression of the leptin receptor (Ob-R), TRAIL and IFN-γ were species-specific. Conclusion Considering the growing prevalence of obesity and the various disorders related to it, the present study provides further insights into the roles human NK cell subsets play in the obesity-associated state of chronic low-grade inflammation.
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Affiliation(s)
- Lena Huebner
- Institute for Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
- Department of General-, Visceral-, Vascular and Thoracic Surgery, Charité, University Medicine Berlin, Campus Mitte, Berlin, Germany
| | - Stefan Engeli
- Institute for Clinical Pharmacology, Hannover Medical School, Hannover, Germany
| | - Christiane D. Wrann
- Division of Endocrinology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Lilia Goudeva
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany
| | - Tobias Laue
- Institute for Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
| | - Heike Kielstein
- Department of Anatomy and Cell Biology, Martin Luther University Halle-Wittenberg, Faculty of Medicine, Halle (Saale), Germany
- * E-mail:
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21
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Kim JY, Xue K, Cao M, Wang Q, Liu JY, Leader A, Han JY, Tsang BK. Chemerin suppresses ovarian follicular development and its potential involvement in follicular arrest in rats treated chronically with dihydrotestosterone. Endocrinology 2013; 154:2912-23. [PMID: 23696570 DOI: 10.1210/en.2013-1001] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In the present study, we have investigated the cellular mechanisms of androgen-induced antral follicular growth arrest and the possible involvement of chemerin and its receptor chemokine-like receptor 1 (CMKLR1) in this process, using a chronically androgenized rat model. We hypothesize that hyperandrogenism induces antral follicle growth arrest via the action of chemerin and ovarian structural changes, resulting from granulosa cell and oocyte apoptosis and theca cell survival. Dihydrotestosterone (DHT) treatment resulted in increased expression of chemerin and CMKLR1 in antral follicles, absence of corpus luteum, and increased atypical follicles. Addition of chemerin to follicle cultures induced granulosa cell apoptosis and suppressed basal, FSH- and growth differentiation factor-9-stimulated follicular growth. DHT down-regulated aromatase expression and increased active caspase-3 content and DNA fragmentation in granulosa cells in vivo. These changes were accompanied by higher phosphatase and tensin homolog and lower phospho-Akt (Ser473) content in antral follicles and higher calpain expression and down-regulation of cytoskeletal proteins in atypical follicles, which were constituted predominantly of theca cells. DHT also activated granulosa cell caspase-3, decreased X-linked inhibitor of apoptosis protein, poly(ADP-ribose) polymerase, and phospho-Akt contents and induced apoptosis in vitro, responses readily attenuated by forced X-linked inhibitor of apoptosis protein expression. These findings are consistent with our hypothesis that antral follicular growth arrest in DHT-treated rats results from increased chemerin expression and action, as well as changes in follicular cell fate and structure, which are a consequence of dysregulated interactions of pro-survival and pro-apoptotic modulators in a cell-specific manner. Our observations suggest that this chronically androgenized rat model may be useful for studies on the long-term effects of androgens on folliculogenesis and may have implications for the female reproductive disorders associated with hyperandrogenism.
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Affiliation(s)
- Ji Young Kim
- Departments of Obstetrics and Gynecology and Cellular and Molecular Medicine, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
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22
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Roberts MD, Bayless DS, Company JM, Jenkins NT, Padilla J, Childs TE, Martin JS, Dalbo VJ, Booth FW, Rector RS, Laughlin MH. Elevated skeletal muscle irisin precursor FNDC5 mRNA in obese OLETF rats. Metabolism 2013; 62:1052-6. [PMID: 23498898 PMCID: PMC3688677 DOI: 10.1016/j.metabol.2013.02.002] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 01/31/2013] [Accepted: 02/01/2013] [Indexed: 02/04/2023]
Abstract
OBJECTIVE There is debate as to whether fibronectin type III domain containing 5 (FNDC5) and its protein product irisin are therapeutic targets for obesity-associated maladies. Thus, we sought to examine FNDC5 mRNA within skeletal muscle of obese/diabetic-prone Otsuka Long-Evans Tokushima Fatty (OLETF) rats versus lean/healthy Long Evans Tokushima Otsuka (LETO) rats. We hypothesized that FNDC5 expression would be greater in obese (OLETF) versus lean (LETO) animals. MATERIALS/METHODS Triceps muscle of 30-32week old OLETF and LETO rats were assayed for FNDC5 and PGC1α mRNA levels. Body composition and circulating biomarkers of the OLETF and LETO rats were also correlated with skeletal muscle FNDC5 mRNA expression patterns in order to examine potential relationships that may exist. RESULTS OLETF rats exhibited twice the amount of triceps FNDC5 mRNA compared to LETO rats (p<0.01). Significant positive correlations existed between triceps muscle FNDC5 mRNA expression patterns versus fat mass (r=0.70, p=0.008), as well as plasma leptin (r=0.82, p<0.001). PGC1α mRNA levels were also highly correlated with FNDC5 mRNA (r=0.85, p<0.001). In subsequent culture experiments, low and high physiological doses of leptin had no effect on PGC1α mRNA or FNDC5 mRNA levels in C2C12 myotubes. Paradoxically, circulating irisin concentrations tended to be higher in a second cohort of LETO versus OLETF rats (p=0.085). CONCLUSION These results reveal a positive association between total body adiposity and skeletal muscle FNDC5 gene expression. Of interest, circulating irisin levels tended to be lower in OLETF rats. Further research is needed to examine whether other adipose tissue-derived factors up-regulate FNDC5 transcription and/or inhibit irisin biosynthesis from FNDC5.
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Affiliation(s)
- Michael D. Roberts
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO USA
| | - David S. Bayless
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO USA
| | - Joseph M. Company
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO USA
| | - Nathan T. Jenkins
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO USA
| | - Jaume Padilla
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO USA
| | - Thomas E. Childs
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO USA
| | - Jeffrey S. Martin
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO USA
| | - Vincent J. Dalbo
- School of Medical and Applied Sciences, Institute of Health and Social Science Research, Central Queensland University, Rockhampton, Queensland AU
| | - Frank W. Booth
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO USA
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO USA
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO USA
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO USA
| | - R. Scott Rector
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO USA
- Internal Medicine – Division of Gastroenterology and Hepatology, University of Missouri, Columbia, MO USA
- Harry S Truman Memorial Veterans Hospital, Columbia, MO, USA
| | - M. Harold Laughlin
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO USA
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO USA
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO USA
- Address all correspondence to: M. Harold Laughlin, Ph.D, Department of Biomedical Sciences, University of Missouri-Columbia, 1600 E Rollins St, room E102, Columbia, MO, USA 65211, Phone: 573-882-7011, )
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23
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Das S, Kumar A, Seth RK, Tokar EJ, Kadiiska MB, Waalkes MP, Mason RP, Chatterjee S. Proinflammatory adipokine leptin mediates disinfection byproduct bromodichloromethane-induced early steatohepatitic injury in obesity. Toxicol Appl Pharmacol 2013; 269:297-306. [PMID: 23438451 PMCID: PMC3654077 DOI: 10.1016/j.taap.2013.02.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 02/05/2013] [Accepted: 02/06/2013] [Indexed: 12/17/2022]
Abstract
Today's developed world faces a major public health challenge in the rise in the obese population and the increased incidence in fatty liver disease. There is a strong association among diet induced obesity, fatty liver disease and development of nonalcoholic steatohepatitis but the environmental link to disease progression remains unclear. Here we demonstrate that in obesity, early steatohepatitic lesions induced by the water disinfection byproduct bromodichloromethane are mediated by increased oxidative stress and leptin which act in synchrony to potentiate disease progression. Low acute exposure to bromodichloromethane (BDCM), in diet-induced obesity produced oxidative stress as shown by increased lipid peroxidation, protein free radical and nitrotyrosine formation and elevated leptin levels. Exposed obese mice showed histopathological signs of early steatohepatitic injury and necrosis. Spontaneous knockout mice for leptin or systemic leptin receptor knockout mice had significantly decreased oxidative stress and TNF-α levels. Co-incubation of leptin and BDCM caused Kupffer cell activation as shown by increased MCP-1 release and NADPH oxidase membrane assembly, a phenomenon that was decreased in Kupffer cells isolated from leptin receptor knockout mice. In obese mice that were BDCM-exposed, livers showed a significant increase in Kupffer cell activation marker CD68 and, increased necrosis as assessed by levels of isocitrate dehydrogenase, events that were decreased in the absence of leptin or its receptor. In conclusion, our results show that exposure to the disinfection byproduct BDCM in diet-induced obesity augments steatohepatitic injury by potentiating the effects of leptin on oxidative stress, Kupffer cell activation and cell death in the liver.
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Affiliation(s)
- Suvarthi Das
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia SC 29208
| | - Ashutosh Kumar
- Free Radical Metabolism Group, Laboratory of Toxicology and Pharmacology, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
| | - Ratanesh Kumar Seth
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia SC 29208
| | - Erik J Tokar
- Inorganic Toxicology Group, National Toxicology Program Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
| | - Maria B. Kadiiska
- Free Radical Metabolism Group, Laboratory of Toxicology and Pharmacology, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
| | - Michael P Waalkes
- Inorganic Toxicology Group, National Toxicology Program Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
| | - Ronald P Mason
- Free Radical Metabolism Group, Laboratory of Toxicology and Pharmacology, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
| | - Saurabh Chatterjee
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia SC 29208
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Xu G, Ji C, Shi C, Fu H, Zhu L, Zhu L, Xu L, Chen L, Feng Y, Zhao Y, Guo X. Modulation of hsa-miR-26b levels following adipokine stimulation. Mol Biol Rep 2012; 40:3577-82. [PMID: 23275201 DOI: 10.1007/s11033-012-2431-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Accepted: 12/18/2012] [Indexed: 12/15/2022]
Abstract
MicroRNAs (miRNAs) are short non-coding RNAs that are involved in post-transcriptional regulation of gene expression. Hsa-miR-26b is an intronic miRNA located in the intron of CTDSP1 (carboxy-terminal domain, RNA polymerase II, polypeptide A, small phosphatase 1). In the present study, the expression of hsa-miR-26b was examined during human preadipocyte differentiation. 15 days after induction of differentiation, mature human adipocytes were treated with adipokines. Hsa-miR-26b was differentially expressed during human preadipocyte differentiation. Tumor necrosis factor-α (TNF-α), leptin and resistin, but not interleukin-6, caused downregulation of hsa-miR-26b expression in adipocytes. These results suggest that the expression of hsa-miR-26b is affected by TNF-α, leptin and resistin and that hsa-miR-26b may be an important mediator in regulating the obesity-related insulin sensitivity and inflammatory responses.
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Affiliation(s)
- Guangfeng Xu
- Department of Laboratory Medicine, The 82nd Hospital of the People's Liberation Army, No.100 Jiankang East Road, Huaian 223001, China
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25
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Lamers D, Schlich R, Horrighs A, Cramer A, Sell H, Eckel J. Differential impact of oleate, palmitate, and adipokines on expression of NF-κB target genes in human vascular smooth muscle cells. Mol Cell Endocrinol 2012; 362:194-201. [PMID: 22750100 DOI: 10.1016/j.mce.2012.06.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 06/04/2012] [Accepted: 06/19/2012] [Indexed: 11/28/2022]
Abstract
It is widely accepted that obesity is a major risk factor for the development of atherosclerosis. In this context, adipose tissue produces a variety of adipokines and releases free fatty acids, contributing to a chronic-low grade inflammation state implicated in vascular complications. In this study, we investigated the role of adipokines, oleic acid (OA), palmitic acid (PA), and the combinations on activation of NF-κB target genes in human vascular smooth muscle cells (SMC) to assess the hypothesis of synergistic interactions between these molecules. Adipocyte-conditioned medium (CM), generated from human adipocytes, in combination with low concentrations of OA, but not PA, induces SMC proliferation and activation of the transcription factor NF-κB in a synergistic way. Combined treatment of CM and OA further regulates a set of downstream NF-κB target genes including angiopoietin-1, activin A, and MMP-1, all critically involved in SMC dysfunction. This suggests that the lipotoxic potential of fatty acids is substantially enhanced by the presence of adipocyte-derived factors.
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Affiliation(s)
- Daniela Lamers
- Paul-Langerhans-Group, Integrative Physiology, German Diabetes Center, Düsseldorf, Germany
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26
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Abstract
Studies have shown the implication of specific adipokines or fatty acids (FA) in the pathogenesis of insulin resistance. However, the interplay of adipokines with FA remains poorly understood. This study aimed to investigate the combined effects of adipokines and low concentrations of palmitic acid (PA, 100 µmol/l) on skeletal muscle metabolism. Human skeletal muscle cells were incubated with adipocyte-conditioned medium (CM), PA or PA+CM, and FA transporter and FA metabolism were analysed. CM-incubation increased CD36 level (1.8 fold) and PA-uptake (1.4 fold). However, only co-application of PA+CM resulted in profound lipid accumulation (5.3 fold), 60% reduction of PA-oxidation and 3.5 fold increased diacylglycerol content. Our results support a novel role for adipokines in the pathogenesis of T2D by increasing the lipotoxic potential of PA, notably of low concentrations. This implies an increased lipotoxic risk already at an early stage of weight gain, when lipolysis has not yet contributed to increased plasma free FA levels.
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Affiliation(s)
- Annika Taube
- Paul-Langerhans-Group, Integrative Physiology, German Diabetes Center, Duesseldorf, Germany
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27
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Higashi K, Kubo H, Watanabe H, Fujimori K, Mikami T, Kaneko H. Adipokine ganglioside GM2 activator protein stimulates insulin secretion. FEBS Lett 2011; 585:2587-91. [PMID: 21784073 DOI: 10.1016/j.febslet.2011.07.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2011] [Revised: 06/28/2011] [Accepted: 07/07/2011] [Indexed: 12/21/2022]
Abstract
Recently, we identified ganglioside GM2 activator protein (GM2AP) as a novel adipokine, and revealed that treatment of cultured cells with GM2AP impairs insulin signal transduction. The aim of this study was to examine the impact of GM2AP on glucose metabolism in vivo. Injection of recombinant GM2AP in mice significantly lowered blood glucose levels in glucose tolerance tests. Administration of GM2AP to mice for 10 days increased serum insulin levels, whereas the contents of glucose, leptin and FFA were significantly decreased. Stimulation of calcium influx and insulin secretion by GM2AP was observed in hamster insulinoma HIT-T15 cells. Blockage of GM2AP function by specific antibodies inhibited GM2AP-induced insulin secretion. These results provide novel insights into the physiological functions of GM2AP in obesity.
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Affiliation(s)
- Kiyoshi Higashi
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd, Osaka, Japan.
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28
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Yang H, Li F, Kong X, Yuan X, Lian G, Geng M, Li T, Yin J, Yin Y. Molecular cloning, tissue distribution and ontogenetic expression of Xiang pig chemerin and its involvement in regulating energy metabolism through Akt and ERK1/2 signaling pathways. Mol Biol Rep 2011; 39:1887-94. [PMID: 21643960 DOI: 10.1007/s11033-011-0934-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2011] [Accepted: 05/24/2011] [Indexed: 12/27/2022]
Abstract
Chemerin, as a new member of adipokines family, is highly expressed in adipose tissue in rodent and its expression increases with obesity. Moreover, chemerin has been reported to have significant relationship with metabolic syndrome and insulin sensitivity. Here, the gene encoding chemerin from Xiang pig was cloned. The open reading frame of this cDNA encodes 163 deduced amino acid residues. The putative protein has a N-terminal signaling peptide and a nuclear localization signal profile which are highly conserved among the vertebrate orthologs. Both chemerin and chemerinR are highly expressed in lung, kidney and small intestine in adult Xiang pig. Besides these tissues, chemerin is abundant in liver and backfat, and chemerinR is abundant in spleen and skeletal muscle. We also investigated the age-dependent expression of chemerin in suckling Xiang piglets in various tissues, which showed an interaction between age and segments in abundance of chemerin and chemerinR from day 1 to day 21. For chemerinR, it was abundant in skeletal muscle of both adult and fetal Xiang pig. Further, we treated differentiated C2C12 cells with chemerin. The result showed that chemerin regulated energy metabolism partly through Akt and ERK1/2 signaling pathway. Taken together, our findings provide basic molecular information for the deeper investigation on the function of chemerin.
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Affiliation(s)
- Huansheng Yang
- Research Center for Healthy Breeding of Livestock and Poultry, Hunan Engineering and Research Center of Animal and Poultry Science and Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, the Chinese Academy of Sciences, Hunan 410125, China
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Kim JG, Kim EO, Jeong BR, Min YJ, Park JW, Kim ES, Namgoong IS, Kim YI, Lee BJ. Visfatin stimulates proliferation of MCF-7 human breast cancer cells. Mol Cells 2010; 30:341-5. [PMID: 20848232 DOI: 10.1007/s10059-010-0124-x] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 07/07/2010] [Accepted: 07/09/2010] [Indexed: 12/25/2022] Open
Abstract
Obesity, a condition characterized by increased fat content and altered secretion of adipokines, is a risk factor for postmenopausal breast cancer. Visfatin has recently been established as a novel adipokine that is highly enriched in visceral fat. Here we report that visfatin regulated proliferation of MCF-7 human breast cancer cells. Exogenous administration of recombinant visfatin increased cell proliferation and DNA synthesis rate in MCF-7 cells. Furthermore, visfatin activated G1-S phase cell cycle progression by upregulation of cyclin D1 and cdk2 expression. Visfatin also increased the expression of matrix metalloproteinases 2, matrix metalloproteinases 9, and vascular endothelial growth factor genes, suggesting that it may function in metastasis and angiogenesis of breast cancer. Taken together, these findings suggest that visfatin plays an important role in breast cancer progression.
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Affiliation(s)
- Jae Geun Kim
- Department of Biological Sciences, College of Natural Sciences, University of Ulsan, Ulsan, 680-749, Korea
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Abstract
Studies have shown that the early life environment affects feeding behaviour, food intake and energy balance in later life, suggesting there is a link between foetal and infant growth and the risk of metabolic disorders in adulthood. Although there is an evident epidemiological association between low birth weight and adult-onset diseases, the incidence of metabolic diseases in adulthood among people who were born prematurely is still unknown. Considerable advances have been made during the last years in the scientific knowledge of the benefits of early nutrition, such as breastfeeding, on health and well-being later in life. Nutritional researchers have focussed their attention on the biological characteristics of human breast milk, which represents the main source of nutrients in the first months of life for breastfed infants. Recently, leptin and ghrelin have been detected in the breast milk of mothers of term and preterm infants. Adiponectin and resistin, present in term human milk, have not been investigated in the breast milk of mothers of preterm infants. These hormones are involved in the regulation of energy balance and may have a role in the regulation of growth and development in the neonatal period and infancy, as well as long-term effects on metabolic programming. Leptin, adiponectin and resistin have been found at lower levels in pre-term infants compared with term newborns, whereas there seems to be no difference in ghrelin levels. Future research is necessary to clarify the role of hormones present in breast milk for identifying potential short- and long-term effects of breastfeeding on the health of children born prematurely.
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Affiliation(s)
- Francesco Savino
- Department of Pediatrics, Regina Margherita Children's Hospital, University of Turin, Piazza Polonia 94, Turin, Italy.
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31
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Skurk T, Alberti-Huber C, Hauner H. Effect of conditioned media from mature human adipocytes on insulin-stimulated Akt/PKB phosphorylation in human skeletal muscle cells: role of BMI and fat cell size. Horm Metab Res 2009; 41:190-6. [PMID: 18956303 DOI: 10.1055/s-0028-1093342] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Obesity is associated with chronic low-grade inflammation. It is currently hypothesized that products secreted from fat cells not only cause this proinflammatory condition but may also have a direct impact on the development of insulin resistance in skeletal muscle. The aim of this study was to investigate if adipocyte-conditioned media interfere with insulin-stimulated Akt/PKB phosphorylation in in vitro differentiated human skeletal muscle cells. Primary human skeletal muscle cells were exposed to adipocyte-conditioned media from subjects with a wide range of BMI. Insulin-induced phosphorylation of the signaling proteins Akt/PKB and ERK-2 was analyzed using a bead-based fluorescence detection system and was correlated to BMI and fat cell size. Adipocyte-conditioned media reduced insulin-stimulated Akt/PKB phosphorylation in a manner depending on BMI and fat cell volume. This inhibition in serine phosphorylation was comparable to that observed in TNF-alpha-treated control cultures. Conditioned media from omental adipocytes reduced Akt/PKB phosphorylation moderately to a greater extent compared to media from subcutaneous fat cells from the same donors (p<0.05). Furthermore, there were significant associations between the concentration of selected adipokines and Akt/PKB phosphorylation. These data provide first direct evidence that secreted factors from freshly isolated mature fat cells separated according fat cell size reduce insulin-stimulated Akt/PKB phosphorylation in human skeletal muscle cells and may contribute to the pathogenesis of obesity-associated insulin resistance.
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Affiliation(s)
- T Skurk
- Else Kröner-Fresenius-Center for Nutritional Medicine, Life Science Center Weihenstephan, Technische Universität München, Munich, Germany.
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Wandler A, Bruun JM, Nielsen MP, Richelsen B. Ethanol exerts anti-inflammatory effects in human adipose tissue in vitro. Mol Cell Endocrinol 2008; 296:26-31. [PMID: 18840498 DOI: 10.1016/j.mce.2008.09.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2008] [Revised: 08/17/2008] [Accepted: 09/07/2008] [Indexed: 01/04/2023]
Abstract
Moderate alcohol consumption is suggested to be associated with reduced inflammation and morbidity. Human adipose tissue (AT) and obesity is characterised by low-grade inflammation, so the present study wanted to investigate the effects of ethanol on inflammation in human AT in vitro. Subcutaneous human AT was incubated with ethanol [11-88 mM] under non- or LPS-stimulated [50mg/mL] conditions. Protein and mRNA levels of adiponectin, IL-6, IL-8, TNF-alpha, MCP-1, and CD68 were assessed using ELISA and real-time RT-PCR, respectively. Non-stimulated, ethanol incubations up to 24h increased adiponectin release and mRNA expression (p<0.01) and decreased IL-6 release in both short-term [1.5h] (p<0.05) and long-term [24h] (p<0.01) incubations. Ethanol decreased LPS-stimulated IL-6, IL-8, TNF-alpha, and MCP-1 dose-dependently (all p<0.01). Ethanol decreased CD68 mRNA (p<0.001), which correlated with the investigated adipokines (p<0.05) but not adiponectin (p>0.05). In conclusion, ethanol exerts anti-inflammatory effects in human AT, suggesting that ethanol may attenuate whole-body inflammation.
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MESH Headings
- Adipokines/pharmacology
- Adiponectin/genetics
- Adiponectin/metabolism
- Adipose Tissue/drug effects
- Adipose Tissue/metabolism
- Adipose Tissue/pathology
- Adult
- Anti-Inflammatory Agents/pharmacology
- Antigens, CD/genetics
- Antigens, CD/metabolism
- Antigens, Differentiation, Myelomonocytic/genetics
- Antigens, Differentiation, Myelomonocytic/metabolism
- Cells, Cultured
- Chemokine CCL2/genetics
- Chemokine CCL2/metabolism
- Drug Evaluation, Preclinical
- Ethanol/pharmacology
- Female
- Humans
- Inflammation/prevention & control
- Interleukin-6/genetics
- Interleukin-6/metabolism
- Interleukin-8/genetics
- Interleukin-8/metabolism
- Lipopolysaccharides/pharmacology
- Male
- Middle Aged
- RNA, Messenger/drug effects
- RNA, Messenger/metabolism
- Tumor Necrosis Factor-alpha/genetics
- Tumor Necrosis Factor-alpha/metabolism
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Affiliation(s)
- Anne Wandler
- Department of Endocrinology and Metabolism C, Aarhus University Hospital, Aarhus Sygehus, Aarhus C, Denmark
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Palanivel R, Vu V, Park M, Fang X, Sweeney G. Differential impact of adipokines derived from primary adipocytes of wild-type versus streptozotocin-induced diabetic rats on glucose and fatty acid metabolism in cardiomyocytes. J Endocrinol 2008; 199:389-97. [PMID: 18787059 DOI: 10.1677/joe-08-0336] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The causal relationship between obesity and cardiovascular disease is extensively acknowledged; however, the exact mechanisms linking obesity and heart failure remain unclear. Here, we investigated the influence of adipokines derived from primary adipocytes on glucose and fatty acid uptake and metabolism in isolated primary cardiomyocytes. Either co-culture of these cell types or incubation with adipocyte-conditioned medium significantly increased glucose uptake in cardiomyocytes. When streptozotocin-induced diabetic rats were used as a source of adipocytes, there was a lower ability to elicit glucose uptake in cardiomyocytes which corresponded with lower Akt and AMPK phosphorylation. The profile of glucose metabolism also differed with oxidation being favored upon co-culture with wild-type adipocytes whereas lactate production was strongly induced by adipocytes from diabetic rats. Examination of fatty acid uptake revealed that stimulation only occurred in response to adipokines secreted by wild-type rat adipocytes. Importantly, oxidation of fatty acids by cardiomyocytes was decreased by adipokines derived from diabetic rat adipocytes. Analysis of adipokine profiles in diabetic rat adipocyte-conditioned medium demonstrated the most significant decreases in adiponectin and leptin with increased IL6 expression. Taken together, these data suggest that the profile of adipokines secreted by adipocytes from diabetic rats have a deleterious influence on cardiomyocyte metabolism which may be of relevance in the pathophysiology of heart failure.
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Maumus M, Sengenès C, Decaunes P, Zakaroff-Girard A, Bourlier V, Lafontan M, Galitzky J, Bouloumié A. Evidence of in situ proliferation of adult adipose tissue-derived progenitor cells: influence of fat mass microenvironment and growth. J Clin Endocrinol Metab 2008; 93:4098-106. [PMID: 18682517 DOI: 10.1210/jc.2008-0044] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Adipocyte formation in human adult adipose tissue (hAT) originates from resident progenitor cell differentiation in the stroma vascular fraction of the AT. The processes involved in the self-renewal of this cell population remain to be defined. OBJECTIVE The objective was to study in situ and in vitro hAT progenitor cell (defined as CD34(+)/CD31(-) cells) proliferation. DESIGN AND PARTICIPANTS In situ progenitor cell proliferation was assessed by immunohistochemistry and flow cytometry analyses on hAT from lean to obese subjects using the proliferation marker Ki-67. The effects of adipokines, hypoxia, and conditioned media (CM) from adipocytes, capillary endothelial cells, and macrophages isolated by an immunoselection approach were studied on hAT progenitor cell growth. Cell death in hAT was assessed by the terminal deoxynucleotidyl transferase-mediated dUTP-fluorescein end labeling method. RESULTS Ki-67-positive staining was observed in AT progenitor cells. Fat mass enlargement in obese patients was associated with an increased Ki-67(+) progenitor cell population together with a new fraction of small adipocytes and increased cell death. HIF-1alpha mRNA expression in freshly harvested progenitor cells was positively correlated with body mass index. Adipocyte- and capillary endothelial cell-CM, hypoxia, leptin, IL-6, lysophosphatidic acid, and vascular endothelial growth factor, all increased hAT progenitor cell proliferation in vitro. Macrophage-CM had an antiproliferative effect that was suppressed by an antioxidant. CONCLUSIONS The fraction of proliferative progenitor cells in adult hAT is modulated by the degree of adiposity. Changes in the progenitor cell microenvironment involving adipokines, hypoxia, and oxidative stress might play a key role in the control of the self-renewal of the local pool of AT progenitor cells.
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Affiliation(s)
- Marie Maumus
- Hôpital Rangueil Bat L4, BP 84225, 31432 Toulouse Cedex 04, France
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