Sökresultat

Filtyp

Din sökning på "*" gav 529563 sökträffar

Differential genetic effects of ESR1 gene polymorphisms on osteoporosis outcomes

CONTEXT: Both bone mineral density (BMD) and fracture risk have a strong genetic component. Estrogen receptor alpha (ESR1) is a candidate gene for osteoporosis, but previous studies of ESR1 polymorphisms in this field were hampered by small sample size, lack of standardization, and inconclusive results.OBJECTIVE: To generate large-scale evidence on whether 3 common ESR1 polymorphisms (intron 1 pol

Linkage disequilibrium between polymorphisms in the human TNFRSF1B gene and their association with bone mass in perimenopausal women

Osteoporosis is a multifactorial disease with a strong genetic component characterized by reduced bone density and increased fracture risk. A candidate locus for regulation of hip bone mineral density (BMD) has been identified on chromosome 1p36 by linkage analysis. One of the positional and functional candidate genes located within this region is the tumour necrosis factor receptor superfamily me

Genetic and environmental determinants of peak bone mass in young men and women

Peak bone mass is an important risk factor for the development of osteoporosis in later life. Previous work has suggested that genetic, intrauterine, and environmental factors all contribute to the regulation of bone mass, but the ways in which they interact with each other to do so remain poorly understood. In this study, we investigated the relationship between peak bone mass and polymorphisms o

The contribution of feminist perspectives to climate governance

Feminist analysis focuses on gender relations, thereby it goes beyond a mere focus on women and women’s role in climate governance. While the representation of women in politics and governance is of relevance to such studies, feminist theory makes it possible to also seriously discuss and question the relation between women’s and men’s interests and values in the gender order, and problematize the

Association between COLIA1 Sp1 alleles and femoral neck geometry

Genetic factors play an important role in the pathogenesis of osteoporosis by affecting bone mineral density and other predictors of osteoporotic fracture risk such as ultrasound properties of bone and skeletal geometry. We previously identified a polymorphism of a Sp1 binding site in the Collagen Type 1 Alpha 1 gene (COLIA1) that has been associated with reduced BMD and an increased risk of osteo

Estrogen receptor alpha gene polymorphisms and bone mineral density : haplotype analysis in women from the United Kingdom

Genetic factors are important in the pathogenesis of osteoporosis and the estrogen receptor has been suggested as a possible candidate gene for regulation of bone mineral density (BMD). We investigated the relationship between PvuII, XbaI, and dinucleotide (TA)n repeat polymorphisms of the estrogen receptor alpha (ER-alpha) gene and BMD in a study of women from northeast Scotland in the United Kin

Prediction of osteoporotic fractures by bone densitometry and COLIA1 genotyping : a prospective, population-based study in men and women

Osteoporosis is a common disease with a strong genetic component, characterized by reduced bone mineral density and increased fracture risk. Although the genetic basis of osteoporosis is incompletely understood, previous studies have identified a polymorphism affecting an Sp1 binding site in the COLIA1 gene that predicts bone mineral density and osteoporotic fractures in several populations. Here

COL1A1 Sp1 polymorphism predicts perimenopausal and early postmenopausal spinal bone loss

Genetic factors play an important role in the pathogenesis of osteoporosis but the genes that determine susceptibility to poor bone health are defined incompletely. Previous work has shown that a polymorphism that affects an Spl binding site in the COLIA1 gene is associated with reduced bone mineral density (BMD) and an increased risk of osteoporotic fracture in several populations. Data from cros

Nitric oxide mediates suppression of T cell responses in murine Trypanosoma brucei infection

African trypanosomes induce a generalized state of immunosuppression in their mammalian hosts. One characteristic of this is a suppression of lymphocyte responses to mitogen, which is mediated by suppressor macrophages. We investigated the involvement of nitric oxide in this phenomenon. Both peritoneal and splenic cell cultures from infected mice released nitrite and this was inhibitable by NG-mon

Vitamin K1 intake is associated with higher bone mineral density and reduced bone resorption in early postmenopausal Scottish women : no evidence of gene-nutrient interaction with apolipoprotein E polymorphisms

BACKGROUND: Polymorphisms in the apolipoprotein E (APOE) gene are associated with fracture risk, and a potential mechanism is through vitamin K transport.OBJECTIVE: We investigated the relation between dietary vitamin K(1) intake, APOE polymorphisms, and markers of bone health.DESIGN: We measured bone mineral density (BMD) at the lumbar spine (LS) and femoral neck (FN) in a cohort of Scottish wome

Large-scale analysis of association between polymorphisms in the transforming growth factor beta 1 gene (TGFB1) and osteoporosis : the GENOMOS study

INTRODUCTION: The TGFB1 gene which encodes transforming growth factor beta 1, is a strong candidate for susceptibility to osteoporosis and several studies have reported associations between bone mineral density (BMD), osteoporotic fractures and polymorphisms of TGFB1, although these studies have yielded conflicting results.METHODS: We investigated associations between TGFB1 polymorphisms and BMD a

Large-scale population-based study shows no evidence of association between common polymorphism of the VDR gene and BMD in British women

UNLABELLED: The VDR is a candidate gene for osteoporosis. Here we studied five common polymorphisms of VDR in relation to calcium intake and vitamin D status in a population-based cohort of 3100 British women, but found no significant association with bone mass, bone loss, or fracture.INTRODUCTION: Population studies of vitamin D receptor (VDR) polymorphisms have produced conflicting results. We p

Polymorphisms of the CLCN7 gene are associated with BMD in women

UNLABELLED: Here we show that a common polymorphism causing a valine to methionine amino acid substitution at codon 418 (V418M) in the CLCN7 gene is associated with femoral neck BMD in women. Our study adds to accumulating evidence that shows that common allelic variants in monogenic bone disease genes often contribute to BMD regulation in normal subjects.INTRODUCTION: The CLCN7 gene is a strong c

Interspecies synteny mapping identifies a quantitative trait locus for bone mineral density on human chromosome Xp22

Bone mineral density (BMD) is a complex trait with a strong genetic component and an important predictor of osteoporotic fracture risk. Here we report the use of a cross-species strategy to identify genes that regulate BMD, proceeding from quantitative trait mapping in mice to association mapping of the syntenic region in the human genome. We identified a quantitative trait locus (QTL) on the mous

Methylenetetrahydrofolate reductase polymorphism interacts with riboflavin intake to influence bone mineral density

Bone mineral density is a complex trait regulated by an interaction between genetic and environmental factors. Recent studies have identified a functional polymorphism affecting codon 677 of the methylenetetrahydrofolate reductase (MTHFR) gene that is associated with reduced bone mineral density (BMD) in Japanese and Danish postmenopausal women and increased risk of fracture in elderly Danish wome

Susceptibility to Paget's disease of bone is influenced by a common polymorphic variant of osteoprotegerin

UNLABELLED: To clarify the role of the TNFRSF11B gene encoding osteoprotegerin (OPG), in Paget's disease of bone (PDB) we studied TNFRSF11B polymorphisms in an association study of 690 UK subjects and in a worldwide familial study of 66 kindreds. We found that the G1181 allele of TNFRSF11B, encoding lysine at codon 3 of the OPG protein, predisposes to both sporadic and familial PDB.INTRODUCTION: P

Association of the Pro12Ala and C1431T variants of PPARG and their haplotypes with susceptibility to Type 2 diabetes

AIMS/HYPOTHESIS: The Pro12Ala polymorphism of peroxisome proliferator-activated receptor (PPAR)gamma has been consistently associated with Type 2 diabetes. The rare Ala12 variant is estimated to reduce the risk of developing Type 2 diabetes by 20 percent. This variant is in linkage disequilibrium with another common variant, T1431. Both have opposing associations with body weight. We therefore exa

Association between a polymorphism affecting an AP1 binding site in the promoter of the TCIRG1 gene and bone mass in women

The TCIRG1 gene encodes a component of the osteoclast vacuolar proton pump and previous work has shown that inactivating mutations of the TCIRG1 cause autosomal recessive osteopetrosis. In order to determine whether allelic variation in TCIRG1 contributes to the regulation of bone mineral density (BMD) in normal individuals, we studied the relationship between polymorphisms of TCIRG1 and BMD in a

Effect of a COL1A1 Sp1 binding site polymorphism on arterial pulse wave velocity : an index of compliance

-Reduced arterial compliance precedes changes in blood pressure, which may be mediated through alterations in vessel wall matrix composition. We investigated the effect of the collagen type I-alpha1 gene (COL1A1) +2046G>T polymorphism on arterial compliance in healthy individuals. We recruited 489 subjects (251 men and 238 women; mean age, 22.6+/-1.6 years). COL1A1 genotypes were determined using