@article {908, title = {Kidney function predicts the rate of bone loss in older individuals: the Cardiovascular Health Study.}, journal = {J Gerontol A Biol Sci Med Sci}, volume = {61}, year = {2006}, month = {2006 Jul}, pages = {743-8}, abstract = {

BACKGROUND: Results of cross-sectional analyses of the association of kidney function with bone mineral density (BMD) have been conflicting. We examined the association of cystatin-C, a new marker of kidney function that is unrelated to lean mass, with initial and follow-up BMD, in an ancillary study of the Cardiovascular Health Study, a population-based cohort of individuals > or = 65 years old.

METHODS: Two years after measurement of cystatin-C and other covariates, the first BMD was measured in Pittsburgh, Pennsylvania and Davis, California, by using dual energy x-ray absorptiometry. Follow-up BMD was measured in Pittsburgh 4 years later. Associations of cystatin-C with initial BMD and the change in BMD (\%/y) at the hip were examined with linear regression. Analyses were conducted separately for men and women.

RESULTS: In 1519 participants who had cystatin-C and initial BMD assessed, 614 had follow-up BMD. The percent annual change in BMD at the total hip by cystatin-C quartiles was -0.24, -0.13, -0.40, and -0.66\%/y (first to fourth quartile) in women and -0.02, -0.30, -0.18, and -0.94\%/y in men. After adjusting for potential confounders, cystatin-C was marginally associated with initial BMD in men but not women. Cystatin-C was associated with bone loss in men; after adjustment for weight loss, cystatin-C was not associated with bone loss in women.

CONCLUSION: Kidney dysfunction, as assessed by cystatin-C, is associated with a more rapid loss of BMD at the hip, especially in men. Further studies are needed to confirm these findings and to determine whether this loss leads to an elevated risk of fracture.

}, keywords = {Absorptiometry, Photon, Aged, Bone Density, Creatinine, Cystatin C, Cystatins, Female, Hip, Humans, Kidney Diseases, Kidney Function Tests, Linear Models, Longitudinal Studies, Male, Osteoporosis, Predictive Value of Tests}, issn = {1079-5006}, doi = {10.1093/gerona/61.7.743}, author = {Fried, Linda F and Shlipak, Michael G and Stehman-Breen, Catherine and Mittalhenkle, Anuja and Seliger, Stephen and Sarnak, Mark and Robbins, John and Siscovick, David and Harris, Tamara B and Newman, Anne B and Cauley, Jane A} } @article {1266, title = {Higher serum free testosterone concentration in older women is associated with greater bone mineral density, lean body mass, and total fat mass: the cardiovascular health study.}, journal = {J Clin Endocrinol Metab}, volume = {96}, year = {2011}, month = {2011 Apr}, pages = {989-96}, abstract = {

CONTEXT: The physiological importance of endogenous testosterone (T) in older women is poorly understood.

OBJECTIVE: The aim of the study was to determine the association of higher total and free T levels with bone mineral density (BMD), lean body mass, and fat mass in elderly women.

DESIGN: Total and free T were measured using sensitive assays in 232 community-dwelling women aged 67-94 yr who were enrolled in the Cardiovascular Health Study and had dual-energy x-ray absorptiometry scans. Cross-sectional analyses were performed to examine associations between total and free T and BMD and body composition.

RESULTS: In adjusted models, total T was directly associated with BMD at the lumbar spine (P = 0.04) and hip (P = 0.001), but not body composition outcomes, in all women, and after excluding estrogen users and adjusting for estradiol (P = 0.04 and 0.01, respectively). Free T was positively related to hip BMD, lean body mass, and body fat (all P < 0.05), with more than 10\% differences in each outcome between women at the highest and lowest ends of the free T range, with attenuation after excluding estrogen users and adjusting for estradiol.

CONCLUSIONS: In the setting of the low estradiol levels found in older women, circulating T levels were associated with bone density. Women with higher free T levels had greater lean body mass, consistent with the anabolic effect of T, and, in contrast to men, greater fat mass. Mechanistic studies are required to determine whether a causal relationship exists between T, bone, and body composition in this population and the degree to which any T effects are estrogen-independent.

}, keywords = {Adipose Tissue, Aged, Aged, 80 and over, Body Mass Index, Bone Density, Cardiovascular Physiological Phenomena, Cohort Studies, Female, Health, Humans, Organ Size, Osmolar Concentration, Osteoporosis, Postmenopausal, Testosterone, Thinness, Up-Regulation}, issn = {1945-7197}, doi = {10.1210/jc.2010-0926}, author = {Rariy, Chevon M and Ratcliffe, Sarah J and Weinstein, Rachel and Bhasin, Shalender and Blackman, Marc R and Cauley, Jane A and Robbins, John and Zmuda, Joseph M and Harris, Tamara B and Cappola, Anne R} } @article {1556, title = {Assessment of gene-by-sex interaction effect on bone mineral density.}, journal = {J Bone Miner Res}, volume = {27}, year = {2012}, month = {2012 Oct}, pages = {2051-64}, abstract = {

Sexual dimorphism in various bone phenotypes, including bone mineral density (BMD), is widely observed; however, the extent to which genes explain these sex differences is unclear. To identify variants with different effects by sex, we examined gene-by-sex autosomal interactions genome-wide, and performed expression quantitative trait loci (eQTL) analysis and bioinformatics network analysis. We conducted an autosomal genome-wide meta-analysis of gene-by-sex interaction on lumbar spine (LS) and femoral neck (FN) BMD in 25,353 individuals from 8 cohorts. In a second stage, we followed up the 12 top single-nucleotide polymorphisms (SNPs; p < 1 {\texttimes} 10(-5) ) in an additional set of 24,763 individuals. Gene-by-sex interaction and sex-specific effects were examined in these 12 SNPs. We detected one novel genome-wide significant interaction associated with LS-BMD at the Chr3p26.1-p25.1 locus, near the GRM7 gene (male effect = 0.02 and p = 3.0 {\texttimes} 10(-5) ; female effect = -0.007 and p = 3.3 {\texttimes} 10(-2) ), and 11 suggestive loci associated with either FN- or LS-BMD in discovery cohorts. However, there was no evidence for genome-wide significant (p < 5 {\texttimes} 10(-8) ) gene-by-sex interaction in the joint analysis of discovery and replication cohorts. Despite the large collaborative effort, no genome-wide significant evidence for gene-by-sex interaction was found to influence BMD variation in this screen of autosomal markers. If they exist, gene-by-sex interactions for BMD probably have weak effects, accounting for less than 0.08\% of the variation in these traits per implicated SNP. {\textcopyright} 2012 American Society for Bone and Mineral Research.

}, keywords = {Bone Density, Cohort Studies, Female, Genes, Genome-Wide Association Study, Humans, Male, Meta-Analysis as Topic, Polymorphism, Single Nucleotide, Quantitative Trait Loci, Reproducibility of Results, Sex Characteristics}, issn = {1523-4681}, doi = {10.1002/jbmr.1679}, author = {Liu, Ching-Ti and Estrada, Karol and Yerges-Armstrong, Laura M and Amin, Najaf and Evangelou, Evangelos and Li, Guo and Minster, Ryan L and Carless, Melanie A and Kammerer, Candace M and Oei, Ling and Zhou, Yanhua and Alonso, Nerea and Dailiana, Zoe and Eriksson, Joel and Garc{\'\i}a-Giralt, Natalia and Giroux, Sylvie and Husted, Lise Bjerre and Khusainova, Rita I and Koromila, Theodora and Kung, Annie Waichee and Lewis, Joshua R and Masi, Laura and Mencej-Bedrac, Simona and Nogues, Xavier and Patel, Millan S and Prezelj, Janez and Richards, J Brent and Sham, Pak Chung and Spector, Timothy and Vandenput, Liesbeth and Xiao, Su-Mei and Zheng, Hou-Feng and Zhu, Kun and Balcells, Susana and Brandi, Maria Luisa and Frost, Morten and Goltzman, David and Gonz{\'a}lez-Mac{\'\i}as, Jes{\'u}s and Karlsson, Magnus and Khusnutdinova, Elza K and Kollia, Panagoula and Langdahl, Bente Lomholt and Ljunggren, Osten and Lorentzon, Mattias and Marc, Janja and Mellstr{\"o}m, Dan and Ohlsson, Claes and Olmos, Jos{\'e} M and Ralston, Stuart H and Riancho, Jos{\'e} A and Rousseau, Fran{\c c}ois and Urreizti, Roser and Van Hul, Wim and Zarrabeitia, Mar{\'\i}a T and Castano-Betancourt, Martha and Demissie, Serkalem and Grundberg, Elin and Herrera, Lizbeth and Kwan, Tony and Medina-G{\'o}mez, Carolina and Pastinen, Tomi and Sigurdsson, Gunnar and Thorleifsson, Gudmar and Vanmeurs, Joyce Bj and Blangero, John and Hofman, Albert and Liu, Yongmei and Mitchell, Braxton D and O{\textquoteright}Connell, Jeffrey R and Oostra, Ben A and Rotter, Jerome I and Stefansson, Kari and Streeten, Elizabeth A and Styrkarsdottir, Unnur and Thorsteinsdottir, Unnur and Tylavsky, Frances A and Uitterlinden, Andre and Cauley, Jane A and Harris, Tamara B and Ioannidis, John Pa and Psaty, Bruce M and Robbins, John A and Zillikens, M Carola and Vanduijn, Cornelia M and Prince, Richard L and Karasik, David and Rivadeneira, Fernando and Kiel, Douglas P and Cupples, L Adrienne and Hsu, Yi-Hsiang} } @article {8016, title = {Genome-wide meta-analysis identifies 56 bone mineral density loci and reveals 14 loci associated with risk of fracture.}, journal = {Nat Genet}, volume = {44}, year = {2012}, month = {2012 Apr 15}, pages = {491-501}, abstract = {

Bone mineral density (BMD) is the most widely used predictor of fracture risk. We performed the largest meta-analysis to date on lumbar spine and femoral neck BMD, including 17 genome-wide association studies and 32,961 individuals of European and east Asian ancestry. We tested the top BMD-associated markers for replication in 50,933 independent subjects and for association with risk of low-trauma fracture in 31,016 individuals with a history of fracture (cases) and 102,444 controls. We identified 56 loci (32 new) associated with BMD at genome-wide significance (P < 5 {\texttimes} 10(-8)). Several of these factors cluster within the RANK-RANKL-OPG, mesenchymal stem cell differentiation, endochondral ossification and Wnt signaling pathways. However, we also discovered loci that were localized to genes not known to have a role in bone biology. Fourteen BMD-associated loci were also associated with fracture risk (P < 5 {\texttimes} 10(-4), Bonferroni corrected), of which six reached P < 5 {\texttimes} 10(-8), including at 18p11.21 (FAM210A), 7q21.3 (SLC25A13), 11q13.2 (LRP5), 4q22.1 (MEPE), 2p16.2 (SPTBN1) and 10q21.1 (DKK1). These findings shed light on the genetic architecture and pathophysiological mechanisms underlying BMD variation and fracture susceptibility.

}, keywords = {Bone Density, Computational Biology, European Continental Ancestry Group, Extracellular Matrix Proteins, Female, Femur Neck, Fractures, Bone, Gene Expression Profiling, Genetic Predisposition to Disease, Genome-Wide Association Study, Genotype, Glycoproteins, Humans, Intercellular Signaling Peptides and Proteins, Low Density Lipoprotein Receptor-Related Protein-5, Lumbar Vertebrae, Male, Mitochondrial Membrane Transport Proteins, Osteoporosis, Phosphoproteins, Polymorphism, Single Nucleotide, Quantitative Trait Loci, Risk Factors, Spectrin}, issn = {1546-1718}, doi = {10.1038/ng.2249}, author = {Estrada, Karol and Styrkarsdottir, Unnur and Evangelou, Evangelos and Hsu, Yi-Hsiang and Duncan, Emma L and Ntzani, Evangelia E and Oei, Ling and Albagha, Omar M E and Amin, Najaf and Kemp, John P and Koller, Daniel L and Li, Guo and Liu, Ching-Ti and Minster, Ryan L and Moayyeri, Alireza and Vandenput, Liesbeth and Willner, Dana and Xiao, Su-Mei and Yerges-Armstrong, Laura M and Zheng, Hou-Feng and Alonso, Nerea and Eriksson, Joel and Kammerer, Candace M and Kaptoge, Stephen K and Leo, Paul J and Thorleifsson, Gudmar and Wilson, Scott G and Wilson, James F and Aalto, Ville and Alen, Markku and Aragaki, Aaron K and Aspelund, Thor and Center, Jacqueline R and Dailiana, Zoe and Duggan, David J and Garcia, Melissa and Garc{\'\i}a-Giralt, Natalia and Giroux, Sylvie and Hallmans, G{\"o}ran and Hocking, Lynne J and Husted, Lise Bjerre and Jameson, Karen A and Khusainova, Rita and Kim, Ghi Su and Kooperberg, Charles and Koromila, Theodora and Kruk, Marcin and Laaksonen, Marika and LaCroix, Andrea Z and Lee, Seung Hun and Leung, Ping C and Lewis, Joshua R and Masi, Laura and Mencej-Bedrac, Simona and Nguyen, Tuan V and Nogues, Xavier and Patel, Millan S and Prezelj, Janez and Rose, Lynda M and Scollen, Serena and Siggeirsdottir, Kristin and Smith, Albert V and Svensson, Olle and Trompet, Stella and Trummer, Olivia and van Schoor, Natasja M and Woo, Jean and Zhu, Kun and Balcells, Susana and Brandi, Maria Luisa and Buckley, Brendan M and Cheng, Sulin and Christiansen, Claus and Cooper, Cyrus and Dedoussis, George and Ford, Ian and Frost, Morten and Goltzman, David and Gonz{\'a}lez-Mac{\'\i}as, Jes{\'u}s and K{\"a}h{\"o}nen, Mika and Karlsson, Magnus and Khusnutdinova, Elza and Koh, Jung-Min and Kollia, Panagoula and Langdahl, Bente Lomholt and Leslie, William D and Lips, Paul and Ljunggren, Osten and Lorenc, Roman S and Marc, Janja and Mellstr{\"o}m, Dan and Obermayer-Pietsch, Barbara and Olmos, Jos{\'e} M and Pettersson-Kymmer, Ulrika and Reid, David M and Riancho, Jos{\'e} A and Ridker, Paul M and Rousseau, Fran{\c c}ois and Slagboom, P Eline and Tang, Nelson L S and Urreizti, Roser and Van Hul, Wim and Viikari, Jorma and Zarrabeitia, Mar{\'\i}a T and Aulchenko, Yurii S and Castano-Betancourt, Martha and Grundberg, Elin and Herrera, Lizbeth and Ingvarsson, Thorvaldur and Johannsdottir, Hrefna and Kwan, Tony and Li, Rui and Luben, Robert and Medina-G{\'o}mez, Carolina and Palsson, Stefan Th and Reppe, Sjur and Rotter, Jerome I and Sigurdsson, Gunnar and van Meurs, Joyce B J and Verlaan, Dominique and Williams, Frances M K and Wood, Andrew R and Zhou, Yanhua and Gautvik, Kaare M and Pastinen, Tomi and Raychaudhuri, Soumya and Cauley, Jane A and Chasman, Daniel I and Clark, Graeme R and Cummings, Steven R and Danoy, Patrick and Dennison, Elaine M and Eastell, Richard and Eisman, John A and Gudnason, Vilmundur and Hofman, Albert and Jackson, Rebecca D and Jones, Graeme and Jukema, J Wouter and Khaw, Kay-Tee and Lehtim{\"a}ki, Terho and Liu, Yongmei and Lorentzon, Mattias and McCloskey, Eugene and Mitchell, Braxton D and Nandakumar, Kannabiran and Nicholson, Geoffrey C and Oostra, Ben A and Peacock, Munro and Pols, Huibert A P and Prince, Richard L and Raitakari, Olli and Reid, Ian R and Robbins, John and Sambrook, Philip N and Sham, Pak Chung and Shuldiner, Alan R and Tylavsky, Frances A and van Duijn, Cornelia M and Wareham, Nick J and Cupples, L Adrienne and Econs, Michael J and Evans, David M and Harris, Tamara B and Kung, Annie Wai Chee and Psaty, Bruce M and Reeve, Jonathan and Spector, Timothy D and Streeten, Elizabeth A and Zillikens, M Carola and Thorsteinsdottir, Unnur and Ohlsson, Claes and Karasik, David and Richards, J Brent and Brown, Matthew A and Stefansson, Kari and Uitterlinden, Andr{\'e} G and Ralston, Stuart H and Ioannidis, John P A and Kiel, Douglas P and Rivadeneira, Fernando} } @article {6291, title = {Meta-analysis of genome-wide association studies identifies six new Loci for serum calcium concentrations.}, journal = {PLoS Genet}, volume = {9}, year = {2013}, month = {2013}, pages = {e1003796}, abstract = {

Calcium is vital to the normal functioning of multiple organ systems and its serum concentration is tightly regulated. Apart from CASR, the genes associated with serum calcium are largely unknown. We conducted a genome-wide association meta-analysis of 39,400 individuals from 17 population-based cohorts and investigated the 14 most strongly associated loci in <= 21,679 additional individuals. Seven loci (six new regions) in association with serum calcium were identified and replicated. Rs1570669 near CYP24A1 (P = 9.1E-12), rs10491003 upstream of GATA3 (P = 4.8E-09) and rs7481584 in CARS (P = 1.2E-10) implicate regions involved in Mendelian calcemic disorders: Rs1550532 in DGKD (P = 8.2E-11), also associated with bone density, and rs7336933 near DGKH/KIAA0564 (P = 9.1E-10) are near genes that encode distinct isoforms of diacylglycerol kinase. Rs780094 is in GCKR. We characterized the expression of these genes in gut, kidney, and bone, and demonstrate modulation of gene expression in bone in response to dietary calcium in mice. Our results shed new light on the genetics of calcium homeostasis.

}, keywords = {Animals, Bone and Bones, Bone Density, Calcium, European Continental Ancestry Group, Gene Expression Regulation, Genome-Wide Association Study, Homeostasis, Humans, Kidney, Mice, Polymorphism, Single Nucleotide}, issn = {1553-7404}, doi = {10.1371/journal.pgen.1003796}, author = {O{\textquoteright}Seaghdha, Conall M and Wu, Hongsheng and Yang, Qiong and Kapur, Karen and Guessous, Idris and Zuber, Annie Mercier and K{\"o}ttgen, Anna and Stoudmann, Candice and Teumer, Alexander and Kutalik, Zolt{\'a}n and Mangino, Massimo and Dehghan, Abbas and Zhang, Weihua and Eiriksdottir, Gudny and Li, Guo and Tanaka, Toshiko and Portas, Laura and Lopez, Lorna M and Hayward, Caroline and Lohman, Kurt and Matsuda, Koichi and Padmanabhan, Sandosh and Firsov, Dmitri and Sorice, Rossella and Ulivi, Sheila and Brockhaus, A Catharina and Kleber, Marcus E and Mahajan, Anubha and Ernst, Florian D and Gudnason, Vilmundur and Launer, Lenore J and Mace, Aurelien and Boerwinckle, Eric and Arking, Dan E and Tanikawa, Chizu and Nakamura, Yusuke and Brown, Morris J and Gaspoz, Jean-Michel and Theler, Jean-Marc and Siscovick, David S and Psaty, Bruce M and Bergmann, Sven and Vollenweider, Peter and Vitart, Veronique and Wright, Alan F and Zemunik, Tatijana and Boban, Mladen and Kolcic, Ivana and Navarro, Pau and Brown, Edward M and Estrada, Karol and Ding, Jingzhong and Harris, Tamara B and Bandinelli, Stefania and Hernandez, Dena and Singleton, Andrew B and Girotto, Giorgia and Ruggiero, Daniela and d{\textquoteright}Adamo, Adamo Pio and Robino, Antonietta and Meitinger, Thomas and Meisinger, Christa and Davies, Gail and Starr, John M and Chambers, John C and Boehm, Bernhard O and Winkelmann, Bernhard R and Huang, Jie and Murgia, Federico and Wild, Sarah H and Campbell, Harry and Morris, Andrew P and Franco, Oscar H and Hofman, Albert and Uitterlinden, Andr{\'e} G and Rivadeneira, Fernando and V{\"o}lker, Uwe and Hannemann, Anke and Biffar, Reiner and Hoffmann, Wolfgang and Shin, So-Youn and Lescuyer, Pierre and Henry, Hughes and Schurmann, Claudia and Munroe, Patricia B and Gasparini, Paolo and Pirastu, Nicola and Ciullo, Marina and Gieger, Christian and M{\"a}rz, Winfried and Lind, Lars and Spector, Tim D and Smith, Albert V and Rudan, Igor and Wilson, James F and Polasek, Ozren and Deary, Ian J and Pirastu, Mario and Ferrucci, Luigi and Liu, Yongmei and Kestenbaum, Bryan and Kooner, Jaspal S and Witteman, Jacqueline C M and Nauck, Matthias and Kao, W H Linda and Wallaschofski, Henri and Bonny, Olivier and Fox, Caroline S and Bochud, Murielle} }