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Epigenome-wide exploratory study of monozygotic twins suggests differentially methylated regions to associate with hand grip strength
- Source :
- Biogerontology, Soerensen, M, Li, W, Debrabant, B, Nygaard, M, Mengel-From, J, Frost, M, Christensen, K, Christiansen, L & Tan, Q 2019, ' Epigenome-wide exploratory study of monozygotic twins suggests differentially methylated regions to associate with hand grip strength ', Biogerontology, vol. 20, no. 5, pp. 627-647 . https://doi.org/10.1007/s10522-019-09818-1
- Publication Year :
- 2019
-
Abstract
- Hand grip strength is a measure of muscular strength and is used to study age-related loss of physical capacity. In order to explore the biological mechanisms that influence hand grip strength variation, an epigenome-wide association study (EWAS) of hand grip strength in 672 middle-aged and elderly monozygotic twins (age 55-90 years) was performed, using both individual and twin pair level analyses, the latter controlling the influence of genetic variation. Moreover, as measurements of hand grip strength performed over 8 years were available in the elderly twins (age 73-90 at intake), a longitudinal EWAS was conducted for this subsample. No genome-wide significant CpG sites or pathways were found, however two of the suggestive top CpG sites were mapped to the COL6A1 and CACNA1B genes, known to be related to muscular dysfunction. By investigating genomic regions using the comb-p algorithm, several differentially methylated regions in regulatory domains were identified as significantly associated to hand grip strength, and pathway analyses of these regions revealed significant pathways related to the immune system, autoimmune disorders, including diabetes type 1 and viral myocarditis, as well as negative regulation of cell differentiation. The genes contributing to the immunological pathways were HLA-B, HLA-C, HLA-DMA, HLA-DPB1, MYH10, ERAP1 and IRF8, while the genes implicated in the negative regulation of cell differentiation were IRF8, CEBPD, ID2 and BRCA1. In conclusion, this exploratory study suggests hand grip strength to associate with differentially methylated regions enriched in immunological and cell differentiation pathways, and hence merits further investigations. Hand grip strength is a measure of muscular strength and is used to study age-related loss of physical capacity. In order to explore the biological mechanisms that influence hand grip strength variation, an epigenome-wide association study (EWAS) of hand grip strength in 672 middle-aged and elderly monozygotic twins (age 55-90 years) was performed, using both individual and twin pair level analyses, the latter controlling the influence of genetic variation. Moreover, as measurements of hand grip strength performed over 8 years were available in the elderly twins (age 73-90 at intake), a longitudinal EWAS was conducted for this subsample. No genome-wide significant CpG sites or pathways were found, however two of the suggestive top CpG sites were mapped to the COL6A1 and CACNA1B genes, known to be related to muscular dysfunction. By investigating genomic regions using the comb-p algorithm, several differentially methylated regions in regulatory domains were identified as significantly associated to hand grip strength, and pathway analyses of these regions revealed significant pathways related to the immune system, autoimmune disorders, including diabetes type 1 and viral myocarditis, as well as negative regulation of cell differentiation. The genes contributing to the immunological pathways were HLA-B, HLA-C, HLA-DMA, HLA-DPB1, MYH10, ERAP1 and IRF8, while the genes implicated in the negative regulation of cell differentiation were IRF8, CEBPD, ID2 and BRCA1. In conclusion, this exploratory study suggests hand grip strength to associate with differentially methylated regions enriched in immunological and cell differentiation pathways, and hence merits further investigations.
- Subjects :
- 0301 basic medicine
Male
Aging
Cellular differentiation
Denmark
Pathway analyses
Biology
Physical strength
Epigenesis, Genetic
03 medical and health sciences
Grip strength
Epigenome
0302 clinical medicine
Epigenome-wide association study
Genetic variation
Hand grip strength
Humans
Longitudinal Studies
Gene
Aged
Genetics
Hand Strength
Longitudinal data
Immunity
Cell Differentiation
Twins, Monozygotic
DNA Methylation
Middle Aged
Twin data
030104 developmental biology
Differentially methylated regions
Cross-Sectional Studies
CpG site
Comb-p
CpG Islands
Female
Geriatrics and Gerontology
Gerontology
030217 neurology & neurosurgery
Genome-Wide Association Study
Research Article
Subjects
Details
- ISSN :
- 15736768
- Volume :
- 20
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Biogerontology
- Accession number :
- edsair.doi.dedup.....d5b3e936356ea1f8d79882a1eba65008