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Chang KV, Chen YC, Wu WT, Shen HJ, Huang KC, Chu HP, Han DS. Expression of Telomeric Repeat-Containing RNA Decreases in Sarcopenia and Increases after Exercise and Nutrition Intervention. Nutrients 2020; 12:nu12123766. [PMID: 33302352 PMCID: PMC7762552 DOI: 10.3390/nu12123766] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/03/2020] [Accepted: 12/05/2020] [Indexed: 02/08/2023] Open
Abstract
Sarcopenia is defined as aging-related loss of muscle mass and function. Telomere length in chromosomes shortens with age and is modulated by telomeric repeat-containing RNA (TERRA). This study aimed to explore the impact of aging and sarcopenia on telomere length and TERRA expression, and changes following strengthening exercise and nutrition intervention (supplement of branched-chain amino acids, calcium and vitamin D3) for 12 weeks in the sarcopenic population. Older adults (≥65 years old) were divided into non-sarcopenic controls (n = 36) and sarcopenic individuals (n = 36) after measurement of grip strength and body composition. The relative telomere length of leukocytes in all research participants was evaluated using the T/S ratio (telomere/single copy gene), and relative TERRA expression of leukocytes was determined by reverse-transcription qPCR (RT-qPCR). Generalized estimating equation (GEE) was used to analyze the influence of sarcopenia and intervention on the outcomes. There was no significant difference in telomere length between control subjects and participants with sarcopenia. TERRA expression was lower in sarcopenic participants compared to that in non-sarcopenic controls (5.18 ± 2.98 vs. 2.51 ± 1.89; p < 0.001). In the sarcopenic group, intervention significantly increased TERRA expression, but not telomere length. The GEE analysis demonstrated that TERRA expression was negatively associated with sarcopenia (β coefficient = −2.705, p < 0.001) but positively associated with intervention (β coefficient = 1.599, p = 0.023). Sarcopenia is associated with a decrease in TERRA expression in leukocytes. Rebound TERRA expression (returning to the level similar to the non-sarcopenic controls) was observed in the sarcopenic group after exercise and nutrition intervention. Future studies are warranted to examine the potential of TERRA as a biomarker for sarcopenia and its subsequent responses to intervention.
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Affiliation(s)
- Ke-Vin Chang
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, Taipei 100, Taiwan; (K.-V.C.); (W.-T.W.)
- Community and Geriatric Medicine Research Center, National Taiwan University Hospital, Bei-Hu Branch, Taipei 108, Taiwan;
- Department of Physical Medicine and Rehabilitation, National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Yu-Chen Chen
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei 106, Taiwan; (Y.-C.C.); (H.-J.S.)
| | - Wei-Ting Wu
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, Taipei 100, Taiwan; (K.-V.C.); (W.-T.W.)
| | - Hong-Jhin Shen
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei 106, Taiwan; (Y.-C.C.); (H.-J.S.)
| | - Kuo-Chin Huang
- Community and Geriatric Medicine Research Center, National Taiwan University Hospital, Bei-Hu Branch, Taipei 108, Taiwan;
- Department of Family Medicine, National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Hsueh-Ping Chu
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei 106, Taiwan; (Y.-C.C.); (H.-J.S.)
- Correspondence: (H.-P.C.); (D.-S.H.); Tel.: +886-233-662487 (H.-P.C.); +886-223-717101(ext. 5001) (D.-S.H.)
| | - Der-Sheng Han
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, Taipei 100, Taiwan; (K.-V.C.); (W.-T.W.)
- Community and Geriatric Medicine Research Center, National Taiwan University Hospital, Bei-Hu Branch, Taipei 108, Taiwan;
- Department of Physical Medicine and Rehabilitation, National Taiwan University College of Medicine, Taipei 100, Taiwan
- Health Science and Wellness Center, National Taiwan University, Taipei 106, Taiwan
- Correspondence: (H.-P.C.); (D.-S.H.); Tel.: +886-233-662487 (H.-P.C.); +886-223-717101(ext. 5001) (D.-S.H.)
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Mohamadkhani A, Pourasgari M, Poustchi H. Significant SNPs Related to Telomere Length and Hepatocellular Carcinoma Risk in Chronic Hepatitis B Carriers. Asian Pac J Cancer Prev 2018; 19:585-590. [PMID: 29579787 PMCID: PMC5980828 DOI: 10.22034/apjcp.2018.19.3.585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Chronic hepatitis B virus (HBV) infection increases the risk of developing cirrhosis and hepatocellular carcinoma (HCC) with suspected interactions between virus replication and host immune responses. A number of reports have suggested that telomerase function may be involved in chronic hepatitis B (CHB) pathogenesis, but positive or negative associations with HCC risk remain for discussion. Mean telomere length is an indicator of biological aging and it has been reported that reduction in NBV carriers compared to normal individuals. In somatic cells, telomeres contain simple, tandemly repeated G-rich sequences that frequently are reduced by 50 to 200 base pairs at each cell division. Several genome-wide association studies (GWAS) in diverse ethnic populations have revealed eleven single nucleotide polymorphisms (SNPs) linked to telomere length. Two of these, rs398652 and rs621559, have prognostic value and could be used as genetic markers. This review describes current knowledge concerning telomerase activity and telomere length as well as significant polymorphisms in HBV-related HCC patients. In particular, to cast light on genotype-phenotype interactions, we used SNPnexus to evaluate effects of the two SNPs on risk of disease and complex disorders.
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Affiliation(s)
- Ashraf Mohamadkhani
- Liver and Pancreatobiliary Diseases Research Center, Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.
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