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Lecke S.B.,Unidade de Endocrinologia Ginecologica | Morsch D.M.,Federal University of Rio Grande do Sul | Spritzer P.M.,Unidade de Endocrinologia Ginecologica
Brazilian Journal of Medical and Biological Research | Year: 2011

Adipose tissue secretes a variety of adipokines, including leptin and adiponectin, which are involved in endocrine processes regulating glucose and fatty metabolism, energy expenditure, inflammatory response, immunity, cardiovascular function, and reproduction. The present article describes the fluctuations in circulating leptin and adiponectin as well as their patterns of secretion in women from birth to menopause. During pregnancy, leptin and adiponectin seem to act in an autocrine/paracrine fashion in the placenta and adipose tissue, playing a role in the maternal-fetal interface and contributing to glucose metabolism and fetal development. In newborns, adiponectin levels are two to three times higher than in adults. Full-term newborns have significantly higher leptin and adiponectin levels than preterms, whereas small-for- gestational-age infants have lower levels of these adipokines than adequate-for-gestational-age newborns. However, with weight gain, leptin concentrations increase significantly. Children between 5 and 8 years of age experience an increase in leptin and a decrease in adiponectin regardless of body mass index, with a reversal of the newborn pattern for adiponectin: plasma adiponectin levels at age five are inversely correlated with percentage of body fat. In puberty, leptin plays a role in the regulation of menstrual cycles. In adults, it has been suggested that obese individuals exhibit both leptin resistance and decreased serum adiponectin levels. In conclusion, a progressive increase in adiposity throughout life seems to influence the relationship between leptin and adiponectin in women. Source


Amarante F.,Unidade de Endocrinologia Ginecologica | Vilodre L.C.,Unidade de Endocrinologia Ginecologica | Maturana M.A.,Unidade de Endocrinologia Ginecologica | Spritzer P.M.,Unidade de Endocrinologia Ginecologica | Spritzer P.M.,Federal University of Rio Grande do Sul
Brazilian Journal of Medical and Biological Research | Year: 2011

The aim of the present study was to assess the prevalence of osteoporosis in a sample of 32 patients with spontaneous primary ovarian insufficiency (POI) in comparison to reference groups of 25 pre- and 55 postmenopausal women. Hip (lumbar) and spinal bone mineral density (BMD) measurements were performed by dual-energy X-ray absorptiometry in the three groups. The median age of POI patients at the time of diagnosis was 35 years (interquartile range: 27-37 years). The mean ± SD age of postmenopausal reference women (52.16 ± 3.65 years) was higher than that of POI (46.28 ± 10.38 years) and premenopausal women (43.96 ± 7.08; P = 0.001) at the time of BMD measurement. Twenty-seven (84.4%) POI women were receiving hormone replacement therapy (HRT) at the time of the study. In the postmenopausal reference group, 30.4% were current users of HRT. Lumbar BMD was significantly lower in the POI group (1.050 ± 0.17 g/cm 2) compared to the age-matched premenopausal reference group (1.136 ± 0.12 g/cm 2; P = 0.040). Moreover, 22 (68.7%) POI women had low bone density (osteopenia/osteoporosis by World Health Organization criteria) versus 47.3% of the postmenopausal reference group (P = 0.042). In conclusion, the present data indicate that BMD is significantly lower in patients with POI than in age-matched premenopausal women. Also, the prevalence of osteopenia/osteoporosis is higher in POI women than in women after natural menopause. Early medical interventions are necessary to ensure that women with POI will maintain their bone mass. Source


Colpani V.,Unidade de Endocrinologia Ginecologica | Spritzer P.M.,Unidade de Endocrinologia Ginecologica | Lodi A.P.,University Of Passo Fundo | Dorigo G.G.,University Of Passo Fundo | And 5 more authors.
Revista de Saude Publica | Year: 2014

Objective: To compare two methods of assessing physical activity in pre-, peri- and postmenopausal women. Methods: Cross-sectional study nested in a cohort of pre-, peri- and postmenopausal women in a city in Southern Brazil. The participants completed a questionnaire that included sociodemographic and clinical data. Physical activity was assessed using a digital pedometer and the International Physical Activity Questionnaire, short version. The participants were classified into strata of physical activity according to the instrument used. For statistical analysis, the Spearman correlation test, Kappa index, concordance coefficient and Bland-Altman plots were used. Results: The concordance (k = 0110; p = 0.007) and the correlation (rho = 0.136, p = 0.02) between the International Physical Activity Questionnaire, short version, and pedometer were weak. In Bland-Altman plots, it was observed that differences deviate from zero value whether the physical activity is minimal or more intense. Comparing the two methods, the frequency of inactive women is higher when assessed by pedometer than by the International Physical Activity Questionnaire - short version, and the opposite occurs in active women. Conclusions: Agreement between the methods was weak. Although easy to use, Physical Activity Questionnaire - short version overestimates physical activity compared with assessment by pedometer. Source


Lecke S.B.,Unidade de Endocrinologia Ginecologica | Lecke S.B.,Federal University of Rio Grande do Sul | Morsch D.M.,Unidade de Endocrinologia Ginecologica | Morsch D.M.,Federal University of Rio Grande do Sul | And 2 more authors.
Genetics and Molecular Research | Year: 2013

We reviewed emerging evidence linking serum levels and adipose tissue expression of leptin and adiponectin in women with polycystic ovary syndrome (PCOS). Previous data obtained by our group from a sample of overweight/obese PCOS women and a control sample of normal weight controls, both stratified by BMI, were reanalyzed. Circulating levels of leptin and adiponectin were determined by commercially available enzyme-linked immunosorbent assays. Adipose tissue total RNA was reserve-transcripted into complementary DNA samples, which were used as templates for quantitative real-time PCR amplification. Positive correlations were found between serum and mRNA levels for both leptin (r = 0.321; P = 0.005) and adiponectin (r = 0.266; P = 0.024). Deter mination of leptin and adiponectin serum levels could serve as an indirect method to assess adipocyte production, since leptin and adiponectin are predominantly produced by subcutaneous adipocytes in women. © FUNPEC-RP. Source

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