Journals / Türk Anestezi ve Reanimasyon Dergisi / 2013 / Cilt: 41 - Sayı: 4

Day vs. Night administration of ısoflurane affects plasma melatonin levels in rats

Ratlarda gece veya gündüz izofluran uygulaması plazma melatonin düzeyini etkiler

Pages
111–114
Publication Date
2022-11-05
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

Conclusion: It was concluded that 1.5% isoflurane administered over 6 hours in 15 day old rats increases plasma melatonin levels significantly in the daytime but does not affect them at night.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: Melatonin synthesis in the pineal gland shows a circadian rhythm and reaches its maximum level during the phase of darkness.
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Key Findings & Data:Methods: Twenty six 15-day-old male rats were included and divided into 4 groups by randomization.
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Conclusion & Impact:Conclusion: It was concluded that 1.5% isoflurane administered over 6 hours in 15 day old rats increases plasma melatonin levels significantly in the daytime but does not affect them at night.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: Melatonin synthesis in the pineal gland shows a circadian rhythm and reaches its maximum level during the phase of darkness. Sur- gery and anaesthesia affect melatonin secretion and endocrine function. The aim of this study was to investigate the effects of isoflurane anaesthesia during night vs. day on plasma melatonin level in rats. Methods: Twenty six 15-day-old male rats were included and divided into 4 groups by randomization. Isoflurane (1.5%) was administered be- tween 07:00 pm and 01:00 am (night group) or 07:00 am and 01:00 pm (day group) in winter; 6 L min-1 of oxygen was administered to control groups during the same time periods. At the end of 6 hours the rats were sacrificed and blood samples were taken. Blood samples were centrifuged and plasma melatonin levels were measured by enzyme-linked immuno- sorbent assay (ELISA). Results: When Group Gc-I (night-isoflurane) was compared with Group Gc-K (night-control), Group Gc-I with Group Gn-I (day-isoflurane), and Group Gc-K with Group Gn-K (day-control), no significant differences were found in plasma melatonin levels (p=0.132, p=0.180 and p=0.065, respectively). When Group Gn-I was compared with Group Gn-K, plasma melatonin levels were significantly increased in Group Gn-I (p=0.009). Conclusion: It was concluded that 1.5% isoflurane administered over 6 hours in 15 day old rats increases plasma melatonin levels significantly in the daytime but does not affect them at night.

Özet

Amaç: Pineal bezde melatonin sentezi sirkadiyen bir ritim gösterir ve ka- ranlık faz boyunca maksimum düzeyine ulaşır. Anestezi ve cerrahi uygu- lamalar, melatonin salgısını ve endokrin fonksiyonunu etkilemektedir. Bu çalışmanın amacı ratlarda gece-gündüz izofluran uygulamasının plazma melatonin düzeyi üzerine etkisinin araştırılmasıdır. Yöntemler: Çalışmaya 15 günlük erkek cinsiyette 26 adet rat alındı ve rastgele 4 gruba ayrıldı. Ratlara kış döneminde 19:00-01:00 (gece grubu) ve 07:00-13:00 (gündüz grubu) saatleri arasında %1,5 izofluran ile anes- tezi uygulandı ve kontrol gruplarına aynı zaman süresince 6 L dk-1 akım hızında oksijen uygulandı. Altı saatlik sürenin sonunda kan örnekleri alın- dıktan sonra ratlar sakrifiye edildi. Alınan kanlardan santrifüj edilerek elde edilen plazmalarda melatonin düzeyleri enzim ilintili immün test (ELISA) yöntemi ile ölçüldü. Bulgular: Grup Gc-İ (gece-izofluran) ile Grup Gc-K (gece-kontrol), Grup Gc-İ ile Grup Gn-İ (gündüz-izofluran), Grup Gc-K ile Grup Gn-K (gün- düz-kontrol) karşılaştırıldığında plazma melatonin düzeyleri açısından an- lamlı fark saptanmadı (sırasıyla p=0,132, p=0,180, p=0,065). Grup Gn-İ ile Grup Gn-K karşılaştırıldığında plazma melatonin düzeyi Grup Gn-İde anlamlı olarak daha yüksek saptandı (p=0,009). Sonuç: On beş günlük ratlarda altı saatlik %1,5 konsantrasyonda uygula- nan izofluranın, gündüz uygulamasında plazma melatonin düzeyini artır- dığı, gece uygulamasında ise etkilemediği saptandı.

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Cite This Article

ÖÇMEN, E., ÖZEL, Ö., ÖZKAYA, F., ERGÜRZ, S., GÜNERLİ, A., GÖKMEN, A. N., CALAN, Ö., AKAN, P. (2022). Day vs. Night administration of ısoflurane affects plasma melatonin levels in rats. Türk Anestezi ve Reanimasyon Dergisi, Cilt: 41 - Sayı: 4, 111–114. https://ajindex.com/articles/619741

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