The DOI matches its Crossref record; 72 of the 72 references it cites were found in a registry or an index.
Leptin and Androgens in Male Obesity: Evidence for Leptin Contribution to Reduced Androgen Levels
Open accessAbstract
Leptin circulates in plasma at concentrations that parallel the amount of fat reserves. In obese males, androgen levels decline in proportion to the degree of obesity. Recently, we have shown that in rodent Leydig cells leptin inhibits hCG-stimulated testosterone (T) production via a functional leptin receptor isoform; others have found that leptin inhibits basal and hCG-induced T secretion by testis from adult rats. In this study, we further investigated the relationship linking leptin and androgens in men. Basal and hCG-stimulated leptin and sex hormone levels were studied in a large group of men ranging from normal weight to very obese (body mass index, 21.8-55.7). Initial cross-sectional studies showed that circulating leptin and fat mass (FM) were inversely related with total and free T (r = -0.51 and r = -0.38, P < 0.01 and P < 0.05, respectively). Multiple regression analysis indicated that the correlation between leptin or FM and T was not lost after controlling for SHBG and/or LH and/or estradiol (E2) levels and that leptin was the best hormonal predictor of the lower androgen levels in obesity. Dynamic studies showed that in obese men the area under the curve of T and free T to LH/hCG stimulation (5000 IU i.m.) was 30-40% lower than in controls and inversely correlated with leptin levels (r = -0.45 and r = -0.40, P < 0.01 and P < 0.05, respectively). Also, LH/hCG-stimulation caused higher increases in 17-OH-progesterone to T ratio in obese men than in controls, whereas no differences were observed between groups either in stimulated E2 levels or in the E2/T ratio. In all subjects, the percentage increases from baseline in the 17-OH-progesterone to T ratio were directly correlated with leptin levels or FM (r = 0.40 and r = 0.45, P < 0.01), but not with E2 or other hormonal variables. In conclusion, our studies, together with previous in vitro findings, indicate that excess of circulating leptin may be an important contributor to the development of reduced androgens in male obesity.
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Cites
Positional cloning of the mouse obese gene and its human homologue
Zhang, Y., Proenca, R., Maffei, M., Barone, M., Leopold, L., & Friedman, J. M. (1994) · Nature · doi:10.1038/372425a0 · Cited by 13,419
Serum Immunoreactive-Leptin Concentrations in Normal-Weight and Obese Humans
Considine, R. V., Sinha, M. K., Heiman, M. L., Kriauciunas, A., Stephens, T. W., Nyce, M. R., Ohannesian, J. P., Marco, C. C., McKee, L. J., Bauer, T. L., et al. (1996) · New England Journal of Medicine · doi:10.1056/nejm199602013340503 · Cited by 6,326
Weight-Reducing Effects of the Plasma Protein Encoded by the obese Gene
Halaas, J. L., Gajiwala, K. S., Maffei, M., Cohen, S. L., Chait, B. T., Rabinowitz, D., Lallone, R. L., Burley, S. K., & Friedman, J. M. (1995) · Science · doi:10.1126/science.7624777 · Cited by 4,451
Effects of the obese Gene Product on Body Weight Regulation in ob / ob Mice
Pelleymounter, M. A., Cullen, M. J., Baker, M. B., Hecht, R., Winters, D., Boone, T., & Collins, F. (1995) · Science · doi:10.1126/science.7624776 · Cited by 4,017
Campfield, L. A., Smith, F. J., Guisez, Y., Devos, R., & Burn, P. (1995) · Science · doi:10.1126/science.7624778 · Cited by 3,243
Role of leptin in the neuroendocrine response to fasting
Ahima, R. S., Prabakaran, D., Mantzoros, C., Qu, D., Lowell, B., Maratos-Flier, E., & Flier, J. S. (1996) · Nature · doi:10.1038/382250a0 · Cited by 3,117
The effects of supraphysiologic doses of testosterone on muscle size and strength in normal men
Bhasin, S., Storer, T. W., Berman, N., Callegari, C., Clevenger, B., Phillips, J., Bunnell, T. J., Tricker, R., Shirazi, A., & Casaburi, R. (1996) · New England Journal of Medicine · doi:10.1056/nejm199607043350101 · Cited by 1,659
Chehab, F. F., Lim, M. E., & Lu, R. (1996) · Nature Genetics · doi:10.1038/ng0396-318 · Cited by 1,476
Adipogenesis and Obesity: Rounding Out the Big Picture
Spiegelman, B. M., & Flier, J. S. (1996) · Cell · doi:10.1016/s0092-8674(00)81359-8 · Cited by 1,269
Leptin is a metabolic signal to the reproductive system
Barash, I., Cheung, C. C., Weigle, D. S., Ren, H., Kabigting, E. B., Kuijper, J. L., Clifton, D. K., & Steiner, R. A. (1996) · Endocrinology · doi:10.1210/en.137.7.3144 · Cited by 1,101
Cited by
Garvey, W. T., Mechanick, J. I., Brett, E. M., Garber, A. J., Hurley, D. L., Jastreboff, A. M., Nadolsky, K., Pessah-Pollack, R., & Plodkowski, R. (2016) · Endocrine Practice · doi:10.4158/ep161365.gl · Cited by 1,914
Hormonal Responses and Adaptations to Resistance Exercise and Training
Kraemer, W. J., & Ratamess, N. A. (2005) · Sports Medicine · doi:10.2165/00007256-200535040-00004 · Cited by 1,389
Kapoor, D., Goodwin, E., Channer, K. S., & Jones, T. H. (2006) · European Journal of Endocrinology · doi:10.1530/eje.1.02166 · Cited by 791
Chavarro, J. E., Toth, T. L., Wright, D. L., Meeker, J. D., & Hauser, R. (2010) · Fertility and Sterility · doi:10.1016/j.fertnstert.2009.01.100 · Cited by 573
Pitteloud, N., Hardin, M., Dwyer, A. A., Valassi, E., Yialamas, M., Elahi, D., & Hayes, F. J. (2005) · The Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jc.2004-2190 · Cited by 525
Metadata
- Authors
- Isidori, A. M.
- Venue
- Journal of Clinical Endocrinology & Metabolism
- Publisher
- The Endocrine Society
- Published
- 1999-10-01
- Volume
- 84
- Issue
- 10
- Pages
- 3673-3680
- ISSN
- 0021-972X (ISSN-L)
- OpenAlex
- W2133833346
- Cited by
- 559
- References
- 72
- FWCI
- 5.11
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Isidori, A. M. (1999). Leptin and Androgens in Male Obesity: Evidence for Leptin Contribution to Reduced Androgen Levels. Journal of Clinical Endocrinology & Metabolism. https://doi.org/10.1210/jc.84.10.3673
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
