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Withers SB, Dewhurst T, Hammond C, Topham CH. MiRNAs as Novel Adipokines: Obesity-Related Circulating MiRNAs Influence Chemosensitivity in Cancer Patients. Noncoding RNA 2020; 6:ncrna6010005. [PMID: 31979312 PMCID: PMC7151601 DOI: 10.3390/ncrna6010005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/08/2020] [Accepted: 01/11/2020] [Indexed: 12/12/2022] Open
Abstract
Adipose tissue is an endocrine organ, capable of regulating distant physiological processes in other tissues via the release of adipokines into the bloodstream. Recently, circulating adipose-derived microRNAs (miRNAs) have been proposed as a novel class of adipokine, due to their capacity to regulate gene expression in tissues other than fat. Circulating levels of adipokines are known to be altered in obese individuals compared with typical weight individuals and are linked to poorer health outcomes. For example, obese individuals are known to be more prone to the development of some cancers, and less likely to achieve event-free survival following chemotherapy. The purpose of this review was twofold; first to identify circulating miRNAs which are reproducibly altered in obesity, and secondly to identify mechanisms by which these obesity-linked miRNAs might influence the sensitivity of tumors to treatment. We identified 8 candidate circulating miRNAs with altered levels in obese individuals (6 increased, 2 decreased). A second literature review was then performed to investigate if these candidates might have a role in mediating resistance to cancer treatment. All of the circulating miRNAs identified were capable of mediating responses to cancer treatment at the cellular level, and so this review provides novel insights which can be used by future studies which aim to improve obese patient outcomes.
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Affiliation(s)
- Sarah B. Withers
- Biomedical Research Centre, School of Science, Engineering and Environment, Peel Building, University of Salford, Salford M5 4WT, UK; (S.B.W.); (T.D.); (C.H.)
- Salford Royal Foundation Trust, Clinical Sciences Building, Stott Lane, Salford M6 8HD, UK
| | - Toni Dewhurst
- Biomedical Research Centre, School of Science, Engineering and Environment, Peel Building, University of Salford, Salford M5 4WT, UK; (S.B.W.); (T.D.); (C.H.)
| | - Chloe Hammond
- Biomedical Research Centre, School of Science, Engineering and Environment, Peel Building, University of Salford, Salford M5 4WT, UK; (S.B.W.); (T.D.); (C.H.)
| | - Caroline H. Topham
- Biomedical Research Centre, School of Science, Engineering and Environment, Peel Building, University of Salford, Salford M5 4WT, UK; (S.B.W.); (T.D.); (C.H.)
- Correspondence: ; Tel.: +44-(0)-161-295-4292
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Sari CI, Eikelis N, Head GA, Schlaich M, Meikle P, Lambert G, Lambert E. Android Fat Deposition and Its Association With Cardiovascular Risk Factors in Overweight Young Males. Front Physiol 2019; 10:1162. [PMID: 31620011 PMCID: PMC6759693 DOI: 10.3389/fphys.2019.01162] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 08/28/2019] [Indexed: 11/16/2022] Open
Abstract
Objective Excess adiposity increases the risk of type-2 diabetes and cardiovascular disease development. Beyond the simple level of adiposity, the pattern of fat distribution may influence these risks. We sought to examine if higher android fat distribution was associated with different hemodynamic, metabolic or vascular profile compared to a lower accumulation of android fat deposits in young overweight males. Methods Forty-six participants underwent dual-energy X-ray absorptiometry and were stratified into two groups. Group 1: low level of android fat (<9.5%) and group 2: high level of android fat (>9.5%). Assessments comprised measures of plasma lipid and glucose profile, blood pressure, endothelial function [reactive hyperemia index (RHI)] and muscle sympathetic nerve activity (MSNA). Results There were no differences in weight, BMI, total body fat and lean mass between the two groups. Glucose tolerance and insulin resistance (fasting plasma insulin) were impaired in group 2 (p < 0.05). Levels of plasma triglycerides and 5 lipid species were higher in group 2 (p < 0.05). Endothelial function was less in group 2 (RHI: 1.64 vs. 2.26, p = 0.003) and heart rate was higher (76 vs. 67 bpm, p = 0.004). No difference occurred in MSNA nor blood pressure between the 2 groups. Conclusion Preferential fat accumulation in the android compartment is associated with increased cardiovascular and metabolic risk via alteration of endothelial function.
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Affiliation(s)
- Carolina Ika Sari
- Human Neurotransmitters Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| | - Nina Eikelis
- Human Neurotransmitters Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia.,Iverson Health Innovation Research Institute, School of Health Sciences, Faculty of Health, Arts and Design, Swinburne University of Technology, Hawthorn, VIC, Australia
| | - Geoffrey A Head
- Neuropharmacology Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| | - Markus Schlaich
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit, The University of Western Australia, Perth, WA, Australia
| | - Peter Meikle
- Metabolomics Laboratories, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| | - Gavin Lambert
- Human Neurotransmitters Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia.,Iverson Health Innovation Research Institute, School of Health Sciences, Faculty of Health, Arts and Design, Swinburne University of Technology, Hawthorn, VIC, Australia
| | - Elisabeth Lambert
- Human Neurotransmitters Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia.,Iverson Health Innovation Research Institute, School of Health Sciences, Faculty of Health, Arts and Design, Swinburne University of Technology, Hawthorn, VIC, Australia
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