Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 14 de 14
Filtrar
1.
Child Obes ; 17(7): 467-475, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34009006

RESUMO

Background: To examine the association between body size perception (BSP) and body size dissatisfaction (BSD) in elementary school children and to document the potential contribution of individual factors [age, sex, and actual body size (BMI Z-scores: BMIZ)] that may influence their relationship. Methods: This study included 269 children (124 boys and 145 girls) between 6 and 13 years of age (9.2 ± 1.6 years). The BSP score was calculated as the difference between the perceived actual body size and BMIZ (actual body size). A negative BSP score indicated an underestimation of their body size. To assess the BSD score, the difference between perceived actual body size and desired body size was calculated. A positive BSD score indicated a desire to be thinner. Results: Perceived actual body size was smaller than BMIZ, independent of age group and weight status. Overall, 64% of children underestimated their body size. The young children living with obesity demonstrated the highest misperception. Results also showed that the proportion of children who desired to be thinner was higher in overweight and obese subgroups. No significant relationship was found between BSP and BSD scores in the entire sample, while a positive association was observed among younger children in the normal-weight and obese subgroups (r = 0.40; p < 0.001 and r = 0.78; p < 0.05, respectively). Conclusions: Underestimation and dissatisfaction of body size are more prevalent in children living with overweight/obesity. Moreover, there is an association between BSP and dissatisfaction, yet this association is dependent on age and weight status.


Assuntos
Imagem Corporal , Obesidade Infantil , Índice de Massa Corporal , Tamanho Corporal , Peso Corporal , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Sobrepeso , Obesidade Infantil/epidemiologia , Instituições Acadêmicas
2.
J Obstet Gynaecol Can ; 41(2): 204-209, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-30316711

RESUMO

OBJECTIVE: The Cardiff Fertility Knowledge Scale (CFKS) and the Fertility Status Awareness Tool (FertiSTAT) are validated tools allowing the evaluation of fertility knowledge and raising awareness about risk indicators for reduced fertility. Their use by health care professionals practicing in the field of reproductive health might optimize fertility of the Canadian population. However, there currently is no version of these questionnaires for the French-Canadian population. The objective of this study was to translate and culturally adapt the CFKS and FertiSTAT to the French-Canadian population. METHODS: The translation and adaptation of the questionnaires was completed following a four-stage approach: (1) forward translation, (2) synthesis, (3) expert committee review, and (4) testing of the prefinal version of the questionnaires. The testing stage was conducted with a sample of 30 women and 10 men. RESULTS: During the translation process, linguistic difficulties were met for some items of both questionnaires but were resolved by consensus of the expert committee. Thirty women and 10 men tested the prefinal version of the CFKS-F and FertiSTAT-F. On a 5-point Likert scale, the global comprehension was 4.8 ± 0.5 and 4.6 ± 0.6, respectively. Based on the comments of the participants, the expert committee made minor modifications in the final version of the questionnaires to clarify the formulation of questions and adapt to one medical term. CONCLUSION: Tools to assess fertility knowledge and the presence of risk indicators for reduced fertility are now available for health care professionals practicing in the field of reproductive health.


Assuntos
Fertilidade , Conhecimentos, Atitudes e Prática em Saúde/etnologia , Adulto , Feminino , Humanos , Masculino , Gravidez , Adulto Jovem
3.
Curr Obes Rep ; 7(1): 76-88, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29460067

RESUMO

PURPOSE OF REVIEW: Our systematic review aims to assess the overall evidence available in the literature regarding the role of physical activity (PA) in individuals with binge eating disorder (BED) and better understand the potential underlying mechanisms of action. RECENT FINDINGS: Currently, the most effective and well-established psychological treatment for BED is cognitive behavioral therapy (CBT) with a remission rate around 80%. CBT is sometimes combined with pharmacotherapy targeting comorbidities associated with BED, such as obesity and depression. Another avenue of treatment that has been less studied is PA. It has been suggested that PA addresses the underlying mechanisms of BED and, thus, increases treatment efficiency. This systematic review provides additional knowledge concerning the benefits of PA in the treatment of individuals with BED including reduction of binge eating (BE) episodes and improvement in other associated comorbidities. Potential mechanisms of action of PA include neurochemical alterations affecting the reward system, reduction of negative affect, and its anorexigenic effects.


Assuntos
Transtorno da Compulsão Alimentar/terapia , Exercício Físico , Terapia Cognitivo-Comportamental , Bases de Dados Factuais , Humanos , Resultado do Tratamento
4.
J Obstet Gynaecol Can ; 40(3): 342-350, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28826643

RESUMO

Physical activity (PA) behaviours after assisted reproductive technology (ART) may influence its success. Bedrest is frequently recommended immediately after intrauterine insemination (IUI) or embryo transfer (ET), and women are also commonly advised to restrict PA after ART. However, these recommendations are not grounded on evidence-based information. The purpose of this systematic review was to assess the impact of PA behaviours during ART on ART success (positive pregnancy test, clinical pregnancy, live birth). A systematic search of the literature was conducted in PubMed, Medline, SPORTdiscus, and CINAHL. The Grading of Recommendations Assessment, Development, and Evaluation system was applied to studies by clinical outcome and used to rate quality of evidence. Twelve studies were included in the review. Our findings suggest that the effect of bedrest immediately after IUI or ET on ART success depends on the procedure used, with favourable effects after IUI ("moderate" quality evidence on clinical pregnancy) but no effect, and even possible unfavourable effects, after ET ("very low" quality evidence on positive pregnancy test and clinical pregnancy). "Very low" quality evidence suggested a decreased live birth rate with bedrest after ET (n = 1) but an increased rate with bedrest after IUI (n = 1). "Very low" quality of evidence suggested no deleterious effect of moderate PA on clinical pregnancy and live birth after ET. On the basis of our findings, studies with more rigourous design and methodology, and considering live birth as an outcome, are needed to provide further evidence on the most appropriate PA behaviours women should adopt to improve ART success.


Assuntos
Repouso em Cama , Transferência Embrionária , Exercício Físico , Inseminação Artificial , Coeficiente de Natalidade , Feminino , Humanos , Resultado do Tratamento
5.
J Matern Fetal Neonatal Med ; 30(17): 2062-2067, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27696933

RESUMO

OBJECTIVE: To evaluate the impact of high-flavanol and high-theobromine (HFHT) chocolate in women at risk of preeclampsia (PE). STUDY DESIGN: We conducted a single-center randomized controlled trial including women with singleton pregnancy between 11 and 14 weeks gestation who had bilateral abnormal uterine artery (UtA) waveforms (notching) and elevated pulsatility index (PI). Participants were randomized to either HFHT or low-flavanol and low-theobromine (LFLT) chocolate (30 grams daily for a total of 12 weeks). UtA PI, reported as multiple of medians (MoM) adjusted for gestational age, was assessed at baseline and 12 weeks after randomization. RESULTS: One hundred thirty-one women were randomized with mean gestational age of 12.4 ± 0.6 weeks and a mean UtA PI of 1.39 ± 0.31 MoM. UtA PI adjusted for gestational age significantly decreased from baseline to the second visit (12 weeks later) in the two groups (p < 0.0001) but no significant difference was observed between the groups (p = 0.16). CONCLUSIONS: Compared with LFLT chocolate, daily intake of HFHT chocolate was not associated with significant changes of UtA PI. Nevertheless, the improvement observed in both groups suggests that chocolate could improve placental function independently of flavanol and/or theobromine content.


Assuntos
Chocolate , Flavonóis/administração & dosagem , Fluxo Pulsátil/efeitos dos fármacos , Teobromina/administração & dosagem , Vasodilatadores/administração & dosagem , Adulto , Distribuição de Qui-Quadrado , Método Duplo-Cego , Feminino , Idade Gestacional , Humanos , Pré-Eclâmpsia/prevenção & controle , Gravidez , Ultrassonografia Doppler/métodos , Artéria Uterina/diagnóstico por imagem , Artéria Uterina/efeitos dos fármacos
6.
Nutr J ; 13: 66, 2014 Jun 27.
Artigo em Inglês | MEDLINE | ID: mdl-24970388

RESUMO

BACKGROUND: Solar ultraviolet (UV) radiation has deleterious effects on the skin, including sunburn, photoaging and cancer. Chocolate flavanols are naturally-occurring antioxidant and anti-inflammatory molecules that could play a role in preventing cutaneous UV damage. We investigated the influence of 12-week high-flavanol chocolate (HFC) consumption on skin sensitivity to UV radiation, measured by minimal erythema dose (MED). We also evaluated skin elasticity and hydration. METHODS: In this 2-group, parallel, double-blind, randomized controlled trial, 74 women aged 20-65 years and Fitzpatrick skin phototypes I or II were recruited from the general community in Quebec City, for randomization to either HFC (n = 33) or low-flavanol chocolate (LFC) (n = 41). A blocked randomisation (4), considering date of entry, skin type and age as factors, generated a sequentially-numbered allocation list. Study participants and research assistants were blinded. Totally, 30 g of chocolate were consumed daily for 12 weeks, followed by a 3-week washout period. MED was assessed at baseline and at 6, 9, 12 and 15 weeks. Main outcome was changes in MED at week 12. RESULTS: 33 participants in the HFC group and 41 in the LFC group were analyzed with 15 weeks of follow-up. Both groups showed similarly-increased MED at 12 weeks (HFC: 0.0252 ± 0.1099 J/cm2 [mean ± standard deviation (SD)]; LFC: 0.0151 ± 0.1118; mean difference (MD): 0.0100 J/cm2; 95% confidence interval (CI): -0.0417 to 0.0618). However, after 3-week washout, the HFC group presented decreased MED (-0.0248 ± 0.1145) whereas no effect was seen in the LFC group (0.0168 ± 0.1698) (MD: -0.0417; 95% CI: -0.1106 to 0.0272). Net temple elasticity increased slightly but significantly by 0.09 ± 0.12 mm in the HFC group at 12 weeks compared to 0.02 ± 0.12 mm in the LFC group (MD: 0.06; 95% CI: 0.01 to 0.12 ). No significant adverse events were reported. CONCLUSION: Our study failed to demonstrate a statistically-significant protective effect of HFC vs. LFC consumption on skin sensitivity to UV radiation as measured by MED. TRIAL REGISTRATION: ClinicalTrials.gov identifier: NCT01444625.


Assuntos
Polifenóis/uso terapêutico , Protetores contra Radiação/uso terapêutico , Pele/efeitos da radiação , Queimadura Solar/prevenção & controle , Adulto , Antioxidantes/farmacologia , Cacau , Método Duplo-Cego , Elasticidade , Eritema/prevenção & controle , Feminino , Humanos , Pessoa de Meia-Idade , Polifenóis/sangue , Quebeque , Pele/efeitos dos fármacos , Fenômenos Fisiológicos da Pele , Raios Ultravioleta
7.
Syst Rev ; 2: 114, 2013 Dec 20.
Artigo em Inglês | MEDLINE | ID: mdl-24360219

RESUMO

BACKGROUND: Previous studies have been limited in reporting the association between chocolate consumption, measured by interviewer-administered questionnaire or serum theobromine, a biomarker for cocoa, and risk of preeclampsia, and have showed somewhat conflicting results. METHODS/DESIGN: A systematic review of observational and experimental studies will be carried out. We will examine PubMed, Embase, and the entire Cochrane Library. Studies of chocolate consumption compared or not with placebo or low flavanol chocolate during pregnancy will be evaluated to investigate the effect of chocolate consumption in pregnant women on the risk of preeclampsia or pregnancy-induced hypertension. Screening for inclusion, data extraction, and quality assessment will be performed independently by two reviewers in consultation with a third reviewer. Validity of the studies will be ascertained by using the Cochrane Collaboration's tool. Relative risk of preeclampsia will be the primary measure of treatment effect. Heterogeneity will be explored by subgroup analysis according to confounding factors and bias. DISCUSSION: This systematic review will contribute to establish the current state of knowledge concerning the possible association between chocolate consumption and prevention of preeclampsia. Furthermore, it will justify if additional experimental trials are necessary to better evaluate the benefits of chocolate consumption on the risk of preeclampsia. TRIAL REGISTRATION: This systematic review has been registered in the PROSPERO international prospective register of systematic reviews. The registration number is: CRD42013005338.


Assuntos
Cacau , Ingestão de Alimentos , Pré-Eclâmpsia , Projetos de Pesquisa , Feminino , Humanos , Gravidez , Pré-Eclâmpsia/epidemiologia , Fatores de Risco , Teobromina/sangue
8.
Cochrane Database Syst Rev ; (7): CD007410, 2013 Jul 30.
Artigo em Inglês | MEDLINE | ID: mdl-23897589

RESUMO

BACKGROUND: Hot flushes are the most common menopausal vasomotor symptom. Hormone therapy (HT) has frequently been recommended for relief of hot flushes, but concerns about the health risks of HT have encouraged women to seek alternative treatments. It has been suggested that acupuncture may reduce hot flush frequency and severity. OBJECTIVES: To determine whether acupuncture is effective and safe for reducing hot flushes and improving the quality of life of menopausal women with vasomotor symptoms. SEARCH METHODS: We searched the following databases in January 2013: the Cochrane Menstrual Disorders and Subfertility Group Specialised Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, EMBASE, CINAHL, PsycINFO, Chinese Biomedical Literature Database (CBM), Chinese Medical Current Content (CMCC), China National Knowledge Infrastructure (CNKI), VIP database, Dissertation Abstracts International, Current Controlled Trials, Clinicaltrials.gov, National Center for Complementary and Alternative Medicine (NCCAM), BIOSIS, AMED, Acubriefs, and Acubase. SELECTION CRITERIA: Randomized controlled trials comparing any type of acupuncture to no treatment/control or other treatments for reducing menopausal hot flushes and improving the quality of life of symptomatic perimenopausal/postmenopausal women were eligible for inclusion. DATA COLLECTION AND ANALYSIS: Sixteen studies, with 1155 women, were eligible for inclusion. Three review authors independently assessed trial eligibility and quality, and extracted data. We pooled data where appropriate and calculated mean differences (MDs) and standardized mean differences (SMDs) with 95% confidence intervals (CI). We evaluated the overall quality of the evidence using Grading of Recommendations Assessment, Development and Evaluation (GRADE) criteria. MAIN RESULTS: Eight studies compared acupuncture versus sham acupuncture. No significant difference was found between the groups for hot flush frequency (MD -1.13 flushes per day, 95% CI -2.55 to 0.29, 8 RCTs, 414 women, I(2) = 70%, low-quality evidence) but flushes were significantly less severe in the acupuncture group, with a small effect size (SMD -0.45, 95% CI -0.84 to -0.05, 6 RCTs, 297 women, I(2) = 62%, very-low-quality evidence). There was substantial heterogeneity for both these outcomes. In a post hoc sensitivity analysis excluding studies of women with breast cancer, heterogeneity was reduced to 0% for hot flush frequency and 34% for hot flush severity and there was no significant difference between the groups for either outcome.Three studies compared acupuncture versus HT. Acupuncture was associated with significantly more frequent hot flushes than HT (MD 3.18 flushes per day, 95% CI 2.06 to 4.29, 3 RCTs, 114 women, I(2) = 0%, low-quality evidence). There was no significant difference between the groups for hot flush severity (SMD 0.53, 95% CI -0.14 to 1.20, 2 RCTs, 84 women, I(2) = 57%, low-quality evidence).One study compared electroacupuncture versus relaxation. There was no significant difference between the groups for either hot flush frequency (MD -0.40 flushes per day, 95% CI -2.18 to 1.38, 1 RCT, 38 women, very-low-quality evidence) or hot flush severity (MD 0.20, 95% CI -0.85 to 1.25, 1 RCT, 38 women, very-low-quality evidence).Four studies compared acupuncture versus waiting list or no intervention. Traditional acupuncture was significantly more effective in reducing hot flush frequency from baseline (SMD -0.50, 95% CI -0.69 to -0.31, 3 RCTs, 463 women, I(2) = 0%, low-quality evidence), and was also significantly more effective in reducing hot flush severity (SMD -0.54, 95% CI -0.73 to -0.35, 3 RCTs, 463 women, I(2) = 0%, low-quality evidence). The effect size was moderate in both cases.For quality of life measures, acupuncture was significantly less effective than HT, but traditional acupuncture was significantly more effective than no intervention. There was no significant difference between acupuncture and other comparators for quality of life. Data on adverse effects were lacking. AUTHORS' CONCLUSIONS: We found insufficient evidence to determine whether acupuncture is effective for controlling menopausal vasomotor symptoms. When we compared acupuncture with sham acupuncture, there was no evidence of a significant difference in their effect on menopausal vasomotor symptoms. When we compared acupuncture with no treatment there appeared to be a benefit from acupuncture, but acupuncture appeared to be less effective than HT. These findings should be treated with great caution as the evidence was low or very low quality and the studies comparing acupuncture versus no treatment or HT were not controlled with sham acupuncture or placebo HT. Data on adverse effects were lacking.


Assuntos
Terapia por Acupuntura , Fogachos/tratamento farmacológico , Terapia de Reposição de Estrogênios , Feminino , Humanos , Pessoa de Meia-Idade , Qualidade de Vida
9.
Nutr J ; 12: 41, 2013 Apr 08.
Artigo em Inglês | MEDLINE | ID: mdl-23565841

RESUMO

BACKGROUND: Several randomized clinical trials (RCTs) indicate that flavanol-rich chocolate has beneficial effects on flow-mediated dilation (FMD) and blood pressure (BP). However, no RCTs have evaluated these outcomes in pregnant women. The objective of this 2-group, parallel, double-blind RCT was to examine the effects of flavanol-rich chocolate on FMD and BP in pregnant women with normal BP. METHODS: Forty-four healthy, pregnant women were randomized to the high-flavanol (n = 23) or low-flavanol (n = 21) chocolate consumption for 12 weeks. At randomization (0, 60, 120 and 180 min after a single 40-g dose of chocolate), 6 and 12 weeks after daily 20-g chocolate intake, we evaluated plasma concentrations of flavanols and theobromine, as well as the FMD and BP. RESULTS: Plasma epicatechin was significantly increased (p < 0.001) 180 min after the consumption of 40-g high-flavanol chocolate compared to low-flavanol chocolate. Theobromine concentrations were significantly higher 180 min and 12 weeks after the intake of experimental chocolate or low-flavanol chocolate (p < 0.001). FMD was not different between the 2 groups at all pre-defined time periods. No other significant within-group or between-group changes were observed. CONCLUSION: These results confirm the feasibility of a large-scale RCT comparing daily consumption of flavanol-rich chocolate to an equivalent placebo during pregnancy and demonstrate higher plasma epicatechin and theobromine concentration in the intervention group after acute ingestion TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT01659060.


Assuntos
Pressão Sanguínea , Cacau/química , Doces , Endotélio/fisiologia , Polifenóis/administração & dosagem , Adolescente , Adulto , Biomarcadores/sangue , Cafeína/sangue , Catequina/sangue , Método Duplo-Cego , Ingestão de Energia , Estudos de Viabilidade , Feminino , Voluntários Saudáveis , Humanos , Cooperação do Paciente , Projetos Piloto , Polifenóis/sangue , Gravidez , Teobromina/sangue , Teofilina/sangue , Adulto Jovem
10.
Cochrane Database Syst Rev ; (7): CD007559, 2011 Jul 06.
Artigo em Inglês | MEDLINE | ID: mdl-21735413

RESUMO

BACKGROUND: Anxiety during pregnancy is a common problem. Anxiety and stress could have consequences on the course of the pregnancy and the later development of the child. Anxiety responds well to treatments such as cognitive behavioral therapy and/or medication. Non-pharmacological interventions such as mind-body interventions, known to decrease anxiety in several clinical situations, might be offered for treating and preventing anxiety during pregnancy. OBJECTIVES: To assess the benefits of mind-body interventions during pregnancy in preventing or treating women's anxiety and in influencing perinatal outcomes. SEARCH STRATEGY: We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (30 November 2010), MEDLINE (1950 to 30 November 2010), EMBASE (1974 to 30 November 2010), the National Center for Complementary and Alternative Medicine (NCCAM) (1 December 2010), ClinicalTrials.gov (December 2010) and Current Controlled Trials (1 December 2010), searched the reference lists of selected studies and contacted professionals and authors in the field. SELECTION CRITERIA: Randomized controlled trials, involving pregnant women of any age at any time from conception to one month after birth, comparing mind-body interventions with a control group. Mind-body interventions include: autogenic training, biofeedback, hypnotherapy, imagery, meditation, prayer, auto-suggestion, tai-chi and yoga. Control group includes: standard care, other pharmacological or non-pharmacological interventions, other types of mind-body interventions or no treatment at all. DATA COLLECTION AND ANALYSIS: Three review authors independently assessed trials for inclusion all assessed risk of bias for each included study. We extracted data independently using an agreed form and checked it for accuracy. MAIN RESULTS: We included eight trials (556 participants), evaluating hypnotherapy (one trial), imagery (five trials), autogenic training (one trial) and yoga (one trial). Due to the small number of studies per intervention and to the diversity of outcome measurements, we performed no meta-analysis, and have reported results individually for each study. Compared with usual care, in one study (133 women), imagery may have a positive effect on anxiety during labor decreasing anxiety at the early and middle stages of labor (MD -1.46; 95% CI -2.43 to -0.49; one study, 133 women) and (MD -1.24; 95% CI -2.18 to -0.30). Another study showed that imagery had a positive effect on anxiety and depression in the immediate postpartum period. Autogenic training might be effective for decreasing women's anxiety before delivering. AUTHORS' CONCLUSIONS: Mind-body interventions might benefit women's anxiety during pregnancy. Based on individual studies, there is some but no strong evidence for the effectiveness of mind-body interventions for the management of anxiety during pregnancy. The main limitations of the studies were the lack of blinding and insufficient details on the methods used for randomization.


Assuntos
Ansiedade/prevenção & controle , Terapias Mente-Corpo/métodos , Complicações na Gravidez/terapia , Treinamento Autógeno , Feminino , Humanos , Hipnose/métodos , Imagens, Psicoterapia/métodos , Gravidez , Complicações na Gravidez/prevenção & controle , Complicações na Gravidez/psicologia , Ensaios Clínicos Controlados Aleatórios como Assunto , Yoga
11.
Environ Health ; 5: 33, 2006 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-17184534

RESUMO

BACKGROUND: Inuit women are highly exposed through their traditional seafood based diet to organochlorine compounds, some of them displaying endocrine disrupting properties. We hypothesized that this exposure might be related to bone characteristics that are altered in osteoporosis, because hormone deficiency is a known risk factor for the disease. METHODS: We measured quantitative ultrasound parameters (QUS) at the right calcaneum of 153 peri- and postmenopausal Inuit women (49-64 year old) from Nuuk, Greenland, and investigated the relation between these parameters and plasma organochlorine concentrations. We used high-resolution gas chromatography with electron capture detection to analyze plasma samples for 14 polychlorinated biphenyls (PCB) congeners and 11 chlorinated pesticides and metabolites. We analysed morning urine samples for cadmium, a potential confounder, by atomic absorption spectrometry. We used a validated questionnaire to document dietary and lifestyle habits as well as reproductive and medical histories. RESULTS: Concentrations of PCB 153, a surrogate of exposure to most organochlorines present in plasma samples, were inversely correlated to QUS parameters in univariate analyses (p < 0.001). However, PCB 153 concentrations were not associated with QUS values in multivariate analyses that comprised potential confounding factors such as age, body weight, former oral contraceptive use and current hormone replacement therapy (HRT) use, which were all significant predictors of bone stiffness (total R2 = 0.39; p < 0.001). CONCLUSION: Overall we found little evidence that organochlorines exposure is related to osteoporosis in Greenlandic Inuit women, but the hypothesis that exposure to dioxin-like compounds might be linked to decreased bone quality and osteoporosis deserves further attention.


Assuntos
Dieta , Exposição Ambiental , Hidrocarbonetos Clorados/sangue , Osteoporose/diagnóstico por imagem , Perimenopausa , Pós-Menopausa , Alimentos Marinhos , Poluentes Químicos da Água/sangue , Cádmio/urina , Calcâneo/diagnóstico por imagem , Cromatografia Gasosa , Estudos Transversais , Feminino , Groenlândia/epidemiologia , Humanos , Inuíte , Pessoa de Meia-Idade , Osteoporose/epidemiologia , Análise de Regressão , Fatores de Risco , Ultrassonografia
12.
J Bone Miner Res ; 20(6): 938-44, 2005 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-15883633

RESUMO

UNLABELLED: Genes are important BMD determinants. We studied the association of an ESRRA gene functional variant with BMD in 1335 premenopausal women. The ESRRA genotype was an independent predictor of L2-L4 BMD, with an effect similar to smoking and equivalent to a 10-kg difference in weight. INTRODUCTION: Several genetic polymorphisms have been associated with osteoporosis or osteoporosis fractures, but no functional effect has been shown for most of these gene variants. Because functional studies have implicated estrogen-related receptor alpha (ESRRA) in bone metabolism, we evaluated whether a recently described regulatory variant of the ESRRA gene is associated with lumbar and hip BMD as measured by DXA and with heel bone parameters as measured by quantitative ultrasound (QUS). MATERIALS AND METHODS: Heel bone parameters were measured by right calcaneal QUS in 1335 healthy French-Canadian premenopausal women, and one-half of these women also had their BMD evaluated at two sites: femoral neck and lumbar spine (L2-L4) by DXA. All bone measures were tested separately for association with the ESRRA genotype by analysis of covariance. The significance of the ESRRA contribution to the model was also assessed by two different permutation tests. RESULTS: A statistically significant association between ESRRA genotype and lumbar spine BMD was observed: women carrying the long ESRRA genotype had a 3.9% (0.045 g/cm2) higher lumbar spine BMD than those carrying the short ESRRA genotype (p = 0.004), independently of other risk factors measured. This effect of ESRRA genotype is similar to the effect of smoking and equivalent to a 10-kg difference in weight. This association was confirmed by permutation tests (p = 0.004). The same trend was observed for femoral neck BMD (2.6%, p = 0.07). However, no association was observed between ESRRA and QUS heel bone measures. CONCLUSION: These results support the genetic influence of this ESRRA regulatory variant on BMD.


Assuntos
Densidade Óssea , Receptores Citoplasmáticos e Nucleares/genética , Receptores de Estrogênio/genética , Absorciometria de Fóton , Adulto , Osso e Ossos/diagnóstico por imagem , Osso e Ossos/metabolismo , Canadá , DNA Complementar/metabolismo , Feminino , Colo do Fêmur/patologia , Biblioteca Gênica , Variação Genética , Genótipo , Humanos , Vértebras Lombares/patologia , Pessoa de Meia-Idade , Análise Multivariada , Polimorfismo Genético , Pré-Menopausa , Ultrassonografia , Receptor ERRalfa Relacionado ao Estrogênio
13.
Med Sci (Paris) ; 19(10): 1030-7, 2003 Oct.
Artigo em Francês | MEDLINE | ID: mdl-14613019

RESUMO

Many women seek alternatives to hormone replacement therapy (HRT). Phytoestrogens are nonsteroidal compounds with estrogenic or antiestrogenic properties. Six of the 16 clinical trials suggest a significant reduction in alleviating symptoms but to a lesser degree than HRT. A meta-analysis showed that phytoestrogens improve lipid profile. The 14 recent clinical trials led, however, to divergent findings. Small clinical trials suggested a protective effect of phytoestrogens on bone metabolism. High concentration of phytoestrogens was associated with a reduction in breast cancer risk in case-control studies.


Assuntos
Terapia de Reposição Hormonal , Isoflavonas/farmacologia , Menopausa , Preparações de Plantas/farmacologia , Idoso , Densidade Óssea , Neoplasias da Mama/etiologia , Neoplasias da Mama/prevenção & controle , Doenças Cardiovasculares/etiologia , Doenças Cardiovasculares/prevenção & controle , Estudos de Casos e Controles , Ensaios Clínicos como Assunto , Feminino , Humanos , Lipídeos/sangue , Pessoa de Meia-Idade , Osteoporose/etiologia , Osteoporose/prevenção & controle , Fitoestrógenos , Fatores de Risco
14.
Med Sci Sports Exerc ; 34(1): 24-31, 2002 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-11782643

RESUMO

PURPOSE: The aim of the study was to investigate the interaction between leisure physical activity and a BsmI polymorphism at the vitamin D receptor (VDR) gene on the modulation of bone mineral density (BMD). METHODS: We studied 575 unrelated healthy postmenopausal women. Lumbar spine and femoral neck BMD were measured by dual-energy x-ray absorptiometry (DXA), and results were expressed as age-and-weight-adjusted (Z-score). VDR BsmI genotype was determined by polymerase reaction chain on peripheral blood leukocytes. RESULTS: Overall, no significant association was found between the level of leisure physical activity or VDR genotypes and adjusted BMD at both bone sites. However, in active women, there was a trend for an association between VDR genotypes and adjusted BMD at the lumbar spine. Active women, who exercised three times or more a week, carrying the "bb" genotype had a lower BMD at the lumbar spine than active women carrying "BB" genotype (ANOVA; P = 0.04). No significant difference in crude or adjusted BMD at both bone sites was found between VDR genotypes in sedentary or moderately active women. Furthermore, classification of women according to the median-age of the sample (63.1 yr) revealed a significant interaction between the level of leisure physical activity and VDR genotype on adjusted lumbar spine BMD in the older active postmenopausal women (N = 137). Older active women carrying the "bb" genotype showed a lower adjusted BMD at the lumbar spine compared with active women carrying the "BB" genotype (P = 0.007). CONCLUSION: These results suggested that gene-environment interactions such as leisure physical activity and VDR genotype may play a role in maintaining the BMD at the lumbar spine in active postmenopausal women, especially in older active women.


Assuntos
Densidade Óssea/genética , Densidade Óssea/fisiologia , Exercício Físico/fisiologia , Pós-Menopausa/fisiologia , Receptores de Calcitriol/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Envelhecimento/fisiologia , Peso Corporal , Desoxirribonucleases de Sítio Específico do Tipo II , Feminino , Colo do Fêmur/fisiologia , Genótipo , Humanos , Estilo de Vida , Vértebras Lombares/fisiologia , Pessoa de Meia-Idade , Polimorfismo de Fragmento de Restrição , Receptores de Calcitriol/fisiologia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...