Journals / Meandros Medical And Dental Journal / 2006 / Cilt: 7 Sayı: 3

Leptin and Neuroendocrine Regulation

LEPTİN VE NÖROENDOKRİN DÜZENLEME

Pages
49–54
Publication Date
2006-12-01
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In conclusion, leptin, regulating energy intake and expenditure also has regulatory effects on reproductive and neuro-endocrine systems.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Leptin, the product of the ob gene, is produced exclusively by the adipose tissue and regulates energy intake and expenditure.
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Key Findings & Data:In ob/ob mice, the fat deposition is increased as a result of insufficient production of leptin.
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Conclusion & Impact:In conclusion, leptin, regulating energy intake and expenditure also has regulatory effects on reproductive and neuro-endocrine systems.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:leptin · bazal metabolizma hızı · osteoporoz

Abstract

Leptin, the product of the ob gene, is produced exclusively by the adipose tissue and regulates energy intake and expenditure. Obese individuals have considerably higher serum leptin concentrations. In ob/ob mice, the fat deposition is increased as a result of insufficient production of leptin. In obese women and men, there is correlation between serum leptin concentrations and body mass index. Leptin appears to influence various reproductive functions. Injecting leptin into ob/ob mice that are infertile and with low levels of gonadotropin increases the weight of the uterus and ovaries and the number of follicles, resulting in restoration of fertility. Administering leptin treatment to normal female mice accelerates puberty. Leptin may be of importance for osteoblastic cell growth and bone mineralization. Leptin may also be expected to stimulate gonadotropin and sex- steroid synthesis and secretion through inhibition of Neuropeptide Y. It has been reported that leptin was expressed in several uterine myomas but not in normal myometrium, so leptin may have a role in the etiopathogenesis in uterine leiomyoma. In conclusion, leptin, regulating energy intake and expenditure also has regulatory effects on reproductive and neuro-endocrine systems.

Özet

İnsan ob gen kromozomu tarafından yağ dokusunda sentezlenen bir hormon olan leptin iştahı ve enerji harcamasını düzenler. Obez kişilerde serum leptin düzeyleri belirgin olarak yüksektir. Ob gen defekti olan ob/ob tipi farelerde, leptinin yeterince üretilememesi nedeniyle yağ depolanması fazladır. Obez kadın ve erkeklerde leptin düzeyi ile vücut kitle indeksi arasında pozitif bir ilişki gösterilmiştir. Leptin reprodüktif fonksiyonlarda da görevlidir. İnfertil ve gonadotropin seviyesi düşük ob/ob farelere leptin enjekte edildiğinde, uterus ve overlerinin ağırlıkları ve overlerdeki folikül sayısı artarak fertilitenin korunması sağlanmıştır. Normal dişi farelere leptin uygulandığında ise pubertenin hızlandığı gözlenmiştir. Diğer yandan leptin osteoblastik hücre büyümesinde ve kemik mineralizasyonunda rol oynayabilir. Leptin ayrıca nöropetid Y'yi inhibe edip gonadotropinlerin ve seks steroidlerinin sentezini stimüle eder. Uterin miyomlarda leptin geninin ekspresyonu gösterilirken sağlıklı insanlardan alınan miyometriumda gösterilememiştir, bu nedenle uterin miyom etyopatogenezinde leptinin rolü olabileceği savunulmaktadır. Sonuç olarak iştahı ve enerji harcanmasını regüle eden leptin reprodüktif ve nöroendokrin sistemde de önemli rol oynamaktadır

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Cite This Article

GÜLTÜRK, S., İMİR, G. (2006). Leptin and Neuroendocrine Regulation. Meandros Medical And Dental Journal, Cilt: 7 Sayı: 3, 49–54. https://ajindex.com/articles/1002862

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References (17)

  1. Zhang Y, Proenca R, Maffei M, et al. Positional cloning of the mouse gene and its human homologue (abstract). Nature 1994; 372:425-432
  2. Tritos NA, Mantzoros CS. Leptin; its role in obesity and beyond. Diabetologia 1997; 40:1371-1379
  3. Zhang F, Basinski MB, Beals JM, et al. Crystal structure of the obese protein leptin-E100. Nature 1997;387:206-209
  4. Kelesidis T, Mantzoros CS. The emerging role of leptin in humans. Pediatr Endocrinol Rev 2006;3:239-48
  5. Muoio DM, Lynis Dohm G. Peripheral metabolic actions of leptin.Best Pract Res Clin Endocrinol Metab 2002;16:653-66
  6. Considine RV, Sinha MK, Heiman ML, et al. Serum immunreactive-leptin concentrations in normal-weight and obese humans. N Engl J Med 1996; 334:292-295
  7. Seufert J, Kıeffer TJ, Leech CA, et al. Leptin suppression of insulin secretion and gene expression in human pancreatic islets: implications for the development of adipogenic diabetes mellitus. J Clin Endocrinol Metab 1999; 84:670-676
  8. Dagogo JS, Fanelli C, Paramore D, et al. Plasma leptin and insulin relationships in obese and nonobese humans (abstract). Diabetes 1996;45:695-698
  9. Mantzoros CS, Flier JS, Lesem MD, et al. Cerebrospinal fluid leptin in anorexia nervosa:correlation with nutritional status and potential role in resistance to weight gain. J Clin Endocrinol Metab 1997; 82:1845-1851
  10. Ruige JB, Dekker JM, Blum WF, et al. Leptin and variables of body adiposity, energy balance and insulin resistance in a population based study. Diabetes Care 1999; 22:1097-1104
  11. Wallace AM. Measurement of leptin and leptin binding in the human circulation. Ann Clin Biochem 2000; 37:244-252
  12. Lönnqvist F, Wennlund A, Arner P. Relationship between circulating leptin and peripheral fat distribution in obese subjects. Int J Obesity 1997; 21:255-260
  13. Kennedy A, Gettys TW, Watson P, et al. The metabolic significance of leptin in humans:gender-based differences in relationship to adiposity, insulin sensitivity, and energy expenditure. J Clin Endocrinol Metab 1997; 82:1293-1300
  14. Blum WF. Leptin:the voice of the adipose tissue. Horm Res 1997; 48:2-8
  15. Ergün A. Obezite, besin alımı ve vücut ağırlığının kontrolünde leptin. T Klin Tıp Bilimleri 1998;18:220- 225
  16. Cumin F, Baum HP, Levens N. Leptin is cleared from the circulation primarily by the kidney. Int J obesity 1996; 20:1120-1126
  17. Merabet E, Dagogo-Jack S, Coyne DW, et al. İncreased plasma leptin concentration in end-stage renal disease. J Clin Endocrinol Metab