Journals / Fırat Üniversitesi Sağlık Bilimleri Tıp Dergisi / 2013 / Cilt: 27 - Sayı: 3

Effect of melatonin on role of food intake regulator neurotransmitters in rats

Sıçanlarda gıda alımının düzenlenmesinde rol alan nörotransmitterler üzerine melatoninin etkisi

Pages
117–120
Publication Date
2022-10-18
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

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

These effects show that melatonin could be decreased food intake.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Objective: Effects of melatonin on food intake in various species have been important studies with contradictory implications.
📊
Key Findings & Data:Materials and Methods: In this study, 16 wistar albino rats were used.
💡
Conclusion & Impact:These effects show that melatonin could be decreased food intake.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: Effects of melatonin on food intake in various species have been important studies with contradictory implications. In this study, we have aimed to investigate the modulatory effects of melatonin on noradrenergic and dopaminergic neurotransmitters in brain areas, LHA, VMN and NAC, which are involved in the regulation of food intake. Materials and Methods: In this study, 16 wistar albino rats were used. Adult male Wistar rats were divided into two groups and fasted for 24 hours. The first groups of animals were intraperitoneally injected with melatonin (2 mg/kg). Controls received ethanol + saline alone. All animals were decapitated 30 mins after injections and brains rapidly removed. LHA, NAC and VMN were isolated from frozen brain clices by micropunch technique. Catecholamine content of these brain samples was determined by High Performance Liquid Chromotography- Electrochemical Detector (HPLC-ECD). Results: Administration of melatonin significantly elevated concentrations of noradrenaline and its metabolite, DHPG in LHA and VMN (except DHPG). In the NAC, noradrenaline values were reduced, but DHPG was increased. No significant changes were seen in dopamin and DOPAC levels in NAC. Conclusion: Melatonin caused an increase noradrenaline and DHPG value in the LHA. This effect of melatonin might be decreased food intake. At the same time melatonin has effects of decrease of noradrenaline value in NAC. These effects show that melatonin could be decreased food intake.

Özet

Amaç: Melatoninin gıda alımı üzerine etkisi ile ilgili, farklı türlerde çelişkili sonuçlar içeren önemli çalışmalar mevcuttur. Bu çalışmadaki amacımız melatoninin gıda alımının düzenlenmesinde rolü olan Lateral Hipotalamik Nükleus (LHA), Ventromedial Hipotalamik Nükleus (VMN) ve Nükleus Akkumbens (NAC) bölgelerindeki nörotransmitterler ile metabolitleri üzerine etkisinin olup olmadığını araştırmaktı. Gereç ve Yöntem: Çalışmada 16 adet wistar albino cinsi sıçan kullanıldı. Yirmidört saat aç bırakılan sıçanlar iki gruba ayrıldı ve bir gruba intraperitoneal melatonin (2mg/kg) verildi. Kontrol grubuna ise çözücü enjekte edildi. Enjeksiyonlardan yarım saat sonra hayvanlar dekapite edilerek beyin dokuları alındı. Mikro panç tekniği ile VMN, LHA ve NAC çıkarılarak homojenize edildi ve Elektrokimyasal Detektörlü, Yüksek Performanslı Sıvı Kromotografisi (HPLC-ECD) yöntemiyle dopamin, noradrenalin ve bunların metabolitlerinin tayini yapıldı. Bulgular: Melatonin, LHA’da noradrenalin ve dihidroksi fenilglikol (DHPG) değerlerinde artışa neden olurken, VMN’da sadece noradrenalin artırmıştır. NAC’de ise noradrenalin değerini anlamlı bir şekilde azaltırken DHPG değerini artırmıştır. Bu nükleusta dopamin ve 3,4-dihidroksi fenilasetikasit (DOPAC) değerlerinde ise herhangi bir değişiklik oluşturmamıştır. Sonuç: Melatoninin LHA’daki noradrenalin ve DHPG değerlerinde artışa neden olması gıda alımını azaltıcı bir etkiye sahip olabileceğini göstermektedir. Aynı şekilde NAC’deki noradrenalin değerindeki azalma da yine melatoninin gıda alımını azaltıcı bir etkiye sahip olabileceğini göstermiştir.

🔖

Cite This Article

SANDAL, S., KELEŞTİMUR, H., CANPOLAT, S., AYDIN, M., KUTLU, S., YILMAZ, B. (2022). Effect of melatonin on role of food intake regulator neurotransmitters in rats. Fırat Üniversitesi Sağlık Bilimleri Tıp Dergisi, Cilt: 27 - Sayı: 3, 117–120. https://ajindex.com/articles/514671

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (13)

  1. Fetissov SO, Meguid MM, Chen C, Miyata G. Synchronized release of dopamine and serotonin in the medial and lateral hypothalamus of rats. Neuroscience 2000; 101: 657-663
  2. Meister B. Control of food intake via leptin receptors in the hypothalamus. Vitam Horm. 2000; 59: 265-304
  3. Morgan P J, Ross A W, Mercer J G and Barrett P. Photoperiodic programming of body weight through the neuroendocrine hypothalamus. J Endocrinol. 2003; Apr; 177:27-34
  4. Chance WT, Nelson JL, Kim M, et al. Burn-induced alterations in feeding, energy expenditure, and brain amine neurotransmitters in rats. J Trauma 1987; 27: 503-509
  5. Pal P, Raj SS, Mohan M, Pal GK. Modulation of feeding and drinking behaviour by catecholamines injected into nucleus accumbens in rats. Indian J Physiol Pharmacol 2000; 44: 24-32
  6. Wolden-Hanson T, Mitton DR, McCants RL et al. Daily melatonin administration to middle-aged male rats suppresses body weigth, intraabdominal adiposity and plasma leptin and insulin independent of food intake and total body fat. Endocrinology 2000; 141: 487-497
  7. Jahnke G, Marr M, Myers C, et al. Maternal and developmental toxicity evaluation of melatonin administered orally to pregnant Sprague Dawley rats. Toxicol Sci 1999; 50: 271-279
  8. Raghavendra V, Kulkarni SK. Melatonin reversal of DOI- induced hypophagia in rats; possible mechanism by suppressing 5-HT(2A) receptor-mediated activation of HPA axis. Brain Res 2000; 860: 112-118
  9. Peschke D, Teichman J, Peschke E. Pineal influence on annular nuclear volume in ventromedial hypothalamic nucleus neurons of the male wistar rat. Chronobiol Int 2000; 17: 15-28
  10. Paxinos G, Watson C. The Rat Brain (Stereotaxic Coordinates) London: Academic Press Inc Ltd. 1986
  11. Ambriz-Tututi M, Rocha-González HI, Cruz SL, Granados- Soto V. Melatonin: A hormone that modulates pain. Life Sci. 2009; 10;84:489-498
  12. Canpolat S, Sandal S, Yilmaz B et al. Effects of pinealectomy and exogenous melatonin on serum leptin levels in male rat. Eur J Pharmacol. 2001; 428: 145–148
  13. Aydin M, Canpolat S, Kuloğlu T, et al. Effects of pinealectomy and exogenous melatonin on ghrelin and peptide YY in gastrointestinal system and neuropeptide Y in hypothalamic arcuate nucleus: Immunohistochemical studies in male rats. Regul Pept 2008;146:197-203 14. Ohtani N, Sugano T, Ohta M. Alterations in monoamines and GABA in the ventromedial and paraventricular nuclei of the hypothalamus following cold exposure: A reduction in noradrenaline induces hy