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  • 1
    In: The Journal of Clinical Endocrinology & Metabolism, The Endocrine Society, Vol. 107, No. 4 ( 2022-03-24), p. e1568-e1576
    Abstract: Alterations in semen characteristics and circulating Sertoli and Leydig cell hormones have been described in obese male adults. Whether hormonal alterations occur before adulthood has not been fully evaluated. Objective We describe circulating Sertoli and Leydig cell hormone levels in overweight–obese (ow/ob) boys through childhood and adolescence in a cross-sectional study. Methods Monocentric study in the Pediatric Endocrinology Unit of Angers University Hospital. Three hundred and fifty-one obese and overweight boys aged 5-19 years underwent physical examination, dual-energy X-ray absorptiometry for body composition, oral glucose tolerance test on insulin and glucose, and measurements of follicle-stimulating hormone, luteinizing hormone, anti-Müllerian hormone (AMH), inhibin B, testosterone, and estradiol. Hormonal levels were compared with normative data obtained from 652 healthy nonoverweight nonobese boys of similar age or Tanner stage. Results Median inhibin B and testosterone levels during puberty were significantly lower in ow/ob than in healthy boys (1) from age & gt;12 years and thereafter for inhibin B, and (2) from age & gt;14 years and thereafter for testosterone. At Tanner stages 4 and 5, 26%, 31%, and 18% of inhibin B, testosterone, and AMH values were below the 5th percentile in ow/ob subjects (P  & lt; .01). In multiple regression analyses, estradiol and total bone mineral density Z-score were negative predictors of inhibin B, fat mass percentage was a negative predictor of testosterone, and insulin was a negative predictor of AMH. Conclusion Lower Sertoli and Leydig cell hormone levels during puberty were observed in the ow/ob boys.
    Type of Medium: Online Resource
    ISSN: 0021-972X , 1945-7197
    RVK:
    Language: English
    Publisher: The Endocrine Society
    Publication Date: 2022
    detail.hit.zdb_id: 2026217-6
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  • 2
    In: The Journal of Clinical Endocrinology & Metabolism, The Endocrine Society, ( 2024-01-02)
    Abstract: The increase in bone mineral content (BMC) and density (BMD) measured by dual-energy X-ray absorptiometry (DXA) in obese children may not sustain the mechanical load associated with weight, and the factors influencing bone mineralization are not well known. Objective We described bone mineralization in overweight– obese (ow/ob) and lean (non-ow/non-ob) boys in relation to body composition. Methods Cross-sectional study in the Pediatric Endocrinology Unit of Angers University Hospital. Two-hundred-forty-nine ow/ob boys aged 8-18 underwent DXA (Hologic Model A densitometer) and insulin, testosterone, and IGF-1 measurements. Bone mineralization was compared with data obtained from 301 lean boys of similar age and height from the NHANES study from 2011 to 2015, using the same DXA model. Path analyses were performed to evaluate the factors associated with total body less head (TBLH) BMC. Results The mean age and height-adjusted difference in TBLH-BMC between obese and lean boys was 241±20 g/cm2. Each 1 kg/m2 increase in BMI was associated with +39±6 g of TBLH-BMC in lean subjects vs. +25±3 g in obese subjects (p & lt; 0.05). Each 1 kg/m2 increase in lean BMI (LBMI) was associated with +78±5 g of TBLH-BMC in lean and obese boys, and each 1 kg/m2 increase in fat mass index (FMI) was associated with a decrease of 9±3 g of TBLH-BMC. TBLH-BMC was directly positively influenced by LBMI and indirectly and positively influenced by IGF-1, testosterone, and insulin (mediated through height and LBMI). FMI indirectly influenced TBLH-BMC, both positively through LBMI and negatively through its negative impact on IGF-1 and testosterone. Conclusion The increase in bone mineralization in obese children does not adapt to the increase in body mass.
    Type of Medium: Online Resource
    ISSN: 0021-972X , 1945-7197
    RVK:
    Language: English
    Publisher: The Endocrine Society
    Publication Date: 2024
    detail.hit.zdb_id: 2026217-6
    Library Location Call Number Volume/Issue/Year Availability
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