@article {7142,
	title = {GWAS analysis of handgrip and lower body strength in older adults in the CHARGE consortium.},
	journal = {Aging Cell},
	volume = {15},
	year = {2016},
	month = {2016 Oct},
	pages = {792-800},
	abstract = {<p>Decline in muscle strength with aging is an important predictor of health trajectory in the elderly. Several factors, including genetics, are proposed contributors to variability in muscle strength. To identify genetic contributors to muscle strength, a meta-analysis of genomewide association studies of handgrip was conducted. Grip strength was measured using a handheld dynamometer in 27~581 individuals of European descent over 65~years of age from 14 cohort studies. Genomewide association analysis was conducted on ~2.7 million imputed and genotyped variants (SNPs). Replication of the most significant findings was conducted using data from 6393 individuals from three cohorts. GWAS of lower body strength was also characterized in a subset of cohorts. Two genomewide significant (P-value< 5~{\texttimes}~10(-8) ) and 39 suggestive (P-value< 5~{\texttimes}~10(-5) ) associations were observed from meta-analysis of the discovery cohorts. After meta-analysis with replication cohorts, genomewide significant association was observed for rs752045 on chromosome 8 (β~=~0.47, SE~=~0.08, P-value~=~5.20~{\texttimes}~10(-10) ). This SNP is mapped to an intergenic region and is located within an accessible chromatin region (DNase hypersensitivity site) in skeletal muscle myotubes differentiated from the human skeletal muscle myoblasts cell line. This locus alters a binding motif of the CCAAT/enhancer-binding protein-β (CEBPB) that is implicated in muscle repair mechanisms. GWAS of lower body strength did not yield significant results. A common genetic variant in a chromosomal region that regulates myotube differentiation and muscle repair may contribute to variability in grip strength in the elderly. Further studies are needed to uncover the mechanisms that link this genetic variant with muscle strength.</p>},
	issn = {1474-9726},
	doi = {10.1111/acel.12468},
	author = {Matteini, Amy M and Tanaka, Toshiko and Karasik, David and Atzmon, Gil and Chou, Wen-Chi and Eicher, John D and Johnson, Andrew D and Arnold, Alice M and Callisaya, Michele L and Davies, Gail and Evans, Daniel S and Holtfreter, Birte and Lohman, Kurt and Lunetta, Kathryn L and Mangino, Massimo and Smith, Albert V and Smith, Jennifer A and Teumer, Alexander and Yu, Lei and Arking, Dan E and Buchman, Aron S and Chibinik, Lori B and De Jager, Philip L and Evans, Denis A and Faul, Jessica D and Garcia, Melissa E and Gillham-Nasenya, Irina and Gudnason, Vilmundur and Hofman, Albert and Hsu, Yi-Hsiang and Ittermann, Till and Lahousse, Lies and Liewald, David C and Liu, Yongmei and Lopez, Lorna and Rivadeneira, Fernando and Rotter, Jerome I and Siggeirsdottir, Kristin and Starr, John M and Thomson, Russell and Tranah, Gregory J and Uitterlinden, Andr{\'e} G and V{\"o}lker, Uwe and V{\"o}lzke, Henry and Weir, David R and Yaffe, Kristine and Zhao, Wei and Zhuang, Wei Vivian and Zmuda, Joseph M and Bennett, David A and Cummings, Steven R and Deary, Ian J and Ferrucci, Luigi and Harris, Tamara B and Kardia, Sharon L R and Kocher, Thomas and Kritchevsky, Stephen B and Psaty, Bruce M and Seshadri, Sudha and Spector, Timothy D and Srikanth, Velandai K and Windham, B Gwen and Zillikens, M Carola and Newman, Anne B and Walston, Jeremy D and Kiel, Douglas P and Murabito, Joanne M}
}
@article {7340,
	title = {The complex genetics of gait speed: genome-wide meta-analysis approach.},
	journal = {Aging (Albany NY)},
	volume = {9},
	year = {2017},
	month = {2017 Jan 10},
	pages = {209-246},
	abstract = {<p>Emerging evidence suggests that the basis for variation in late-life mobility is attributable, in part, to genetic factors, which may become increasingly important with age. Our objective was to systematically assess the contribution of genetic variation to gait speed in older individuals. We conducted a meta-analysis of gait speed GWASs in 31,478 older adults from 17 cohorts of the CHARGE consortium, and validated our results in 2,588 older adults from 4 independent studies. We followed our initial discoveries with network and eQTL analysis of candidate signals in tissues. The meta-analysis resulted in a list of 536 suggestive genome wide significant SNPs in or near 69 genes. Further interrogation with Pathway Analysis placed gait speed as a polygenic complex trait in five major networks. Subsequent eQTL analysis revealed several SNPs significantly associated with the expression of PRSS16, WDSUB1 and PTPRT, which in addition to the meta-analysis and pathway suggested that genetic effects on gait speed may occur through synaptic function and neuronal development pathways. No genome-wide significant signals for gait speed were identified from this moderately large sample of older adults, suggesting that more refined physical function phenotypes will be needed to identify the genetic basis of gait speed in aging.</p>},
	issn = {1945-4589},
	doi = {10.18632/aging.101151},
	author = {Ben-Avraham, Dan and Karasik, David and Verghese, Joe and Lunetta, Kathryn L and Smith, Jennifer A and Eicher, John D and Vered, Rotem and Deelen, Joris and Arnold, Alice M and Buchman, Aron S and Tanaka, Toshiko and Faul, Jessica D and Nethander, Maria and Fornage, Myriam and Adams, Hieab H and Matteini, Amy M and Callisaya, Michele L and Smith, Albert V and Yu, Lei and De Jager, Philip L and Evans, Denis A and Gudnason, Vilmundur and Hofman, Albert and Pattie, Alison and Corley, Janie and Launer, Lenore J and Knopman, Davis S and Parimi, Neeta and Turner, Stephen T and Bandinelli, Stefania and Beekman, Marian and Gutman, Danielle and Sharvit, Lital and Mooijaart, Simon P and Liewald, David C and Houwing-Duistermaat, Jeanine J and Ohlsson, Claes and Moed, Matthijs and Verlinden, Vincent J and Mellstr{\"o}m, Dan and van der Geest, Jos N and Karlsson, Magnus and Hernandez, Dena and McWhirter, Rebekah and Liu, Yongmei and Thomson, Russell and Tranah, Gregory J and Uitterlinden, Andr{\'e} G and Weir, David R and Zhao, Wei and Starr, John M and Johnson, Andrew D and Ikram, M Arfan and Bennett, David A and Cummings, Steven R and Deary, Ian J and Harris, Tamara B and Kardia, Sharon L R and Mosley, Thomas H and Srikanth, Velandai K and Windham, Beverly G and Newman, Ann B and Walston, Jeremy D and Davies, Gail and Evans, Daniel S and Slagboom, Eline P and Ferrucci, Luigi and Kiel, Douglas P and Murabito, Joanne M and Atzmon, Gil}
}
