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Objective: Recent evidence suggests that adiponectin may play a role in bone metabolism. Previous studies demonstrated that the adiponectin levels had a negative correlation with bone mineral density (BMD) in women. However, little is known about the relationship between adiponectin and BMD in men. The aim of this study was to determinate the relationship between the adiponectin levels and BMD in elderly men. Design: Cross-sectional study including 92 healthy men aged 60-80 years. Methods: Main outcome measures were the adiponectin levels estimated by RIA and BMD at lumbar spine and femoral neck using dual energy X-ray absorptiometry. Results: The negative correlation between adiponectin and BMD at the spine was rZK0.209, (P!0.05) and at the femoral neck was rZK0.237, (P!0.001). These correlations disappeared after adjustment for body mass index (BMI). When stratified by BMI, the relationship between BMD and adiponectin remained significant in the subgroup of participants with BMI O27 kg/m 2 , but disappeared in men with BMI %27 kg/m 2 . In multiple regression analysis, adiponectin was a significant determinant of BMD at the spine, not at the femoral neck, in those with BMI O27. Conclusion: BMD is negatively associated with the adiponectin levels in men older than 60 years and this relationship is greater in those men with BMI O27, which suggests a plausible connection between bone and fat tissue.

GDM is not associated with OC, ucOC, OPN, and leptin and does not correlate with insulin resistance. At postpartum, women who develop diabetes have lower osteocalcin concentrations. Leptin correlates with insulin resistance and bone biomarkers in non-diabetic women.

Testosterone therapy elicited a positive effect only in lumbar BMD in elderly men with diminished testosterone serum levels.

Objective: To determine whether cord sera leptin and components of the somatotropin axis – growth hormone (GH), total (t) and free (f) insulin-like growth factor (IGF), IGF-binding protein-3 (IGFBP-3), and insulin – correlate with birth weight. Design: Cross-sectional study of 22 newborns, 12 with normal birth weight (NBW) and 10 with low birth weight (LBW), in a population of healthy mothers with an apparent normal pregnancy. Methods: Paired mother–neonate blood samples were obtained at vaginal delivery in order to measure leptin and the somatotropin axis components. Results: In all cases maternal blood concentrations of leptin, t and fIGF-I, its carrier protein IGFBP-3, and insulin were higher than in the cord sera of the newborns, regardless of their birth weight. On the contrary, maternal GH levels were lower than in their neonates. LBW neonates had decreased levels of leptin, tIGF-I, and IGFBP-3 as compared with those levels in NBW offspring; however, GH concentrations were higher in LBW neonates. Birth weight showed a significant correlation with cord sera leptin, tIGF-I, IGFBP-3, and GH; nevertheless birth weight was neither interrelated with fIGF-I nor with insulin levels. Conclusion: These data demonstrate that birth weight is significantly correlated with both leptin and some components of the somatotropin axis; on the other hand, no correlation was observed between leptin concentrations and each one of the components of the somatotropin axis. It is suggested that fetal leptin and the somatotropin axis cooperate in intrauterine growth and birth weight.

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Background/Aims: An elevated thrombotic risk due to abnormal fibrinolysis might be associated with insulin resistance in postmenopause. The aim of this study was to investigate the association of insulin resistance with a biochemical marker of fibrinolysis as well as the effect of transdermal estrogen treatment (ET) on this association. Methods: Thirty postmenopausal hysterectomized women received transdermal estradiol during 3 months. 17β-Estradiol, FSH, LH, plasminogen activator inhibitor type 1 (PAI-1), insulin and glucose were measured in blood samples before and after ET. Insulin resistance was calculated by the use of the homeostasis model assessment for insulin resistance (HOMA-IR).Results:ET induced a significant decrement in both PAI-1 levels and HOMA-IR values. The study also showed that HOMA-IR was a significant predictor for PAI-1 concentrations. Conclusion: Short-term ET improved HOMA-IR values in parallel with a decrease in PAI-1 levels.