Evaluation of the morphological and ultrastructural effects of on liver tissues of scopolamine use in old rats

Year 2020, Volume: 3 Issue: 2, 148 - 153, 29.12.2020

Bükay Yenice Gürsu , Elif Aksöz Büşra Aslan Betül Yılmaz Öztürk , İlknur Dağ

Abstract

Evaluation of the morphological and ultrastructural effects of on liver tissues of scopolamine use in old rats
Abstract: Scopolamine is a natural plant alkaloid with strong anticholinergic effects. It competitively inhibits muscarinic receptors and produces both peripheral antimuscarinic effects and central sedative, antiemetic and amnesic effects. It has been used as an antiemetic, antisecretory and antispasmodic agent in the treatment of nausea, motion sickness, allergic rhinitis, duodenal ulcer disease, gastrointestinal discomfort and spasm, functional bowel syndrome and hyperactive bladder for many years. Scopolamine is metabolized by the liver, but is usually given in low doses (<1 mg) only for short periods of time. Patients with liver or kidney disease cannot metabolize scopolamine or excrete it in the urine. In such cases, it should be accepted that side effects will increase when considering the use of scopolamine. Although widely used for many years, scopolamine has not been associated with elevated liver enzyme or clinically apparent liver damage. However, there is limited study on its effects on liver tissues if used. Transmission electron microscopy (TEM) is considered to be an important component in liver pathology studies.
Our aim in this study is to evaluate whether scopolamine use causes any changes in the liver with the help of light and electron microscopy. For this purpose, 20 Wistar Albino male old rats were used. Rats were randomly divided into two groups and Scopolamine HBr (Sigma) was prepared by dissolving in 0.9% saline. The control groups were given saline with 0.1 ml / kg oral gavage for 3 weeks, and 0.1 ml / kg saline intraperitoneally 30 minutes before the experiments. In the experimental groups, 0.1 ml / kg saline was administered with oral gavage for 3 weeks and 1 mg / kg scopolamine intraperitoneally was administered 30 minutes before the experiments. At the end of the period, 1mm3 sized liver samples were taken from animals under anesthesia and decapitation was performed. After the fixation procedure light and electronmicroscopic preparartion procedures were performed. Semi-thin sections taken by ultramicrotome from the obtained blocks were examined by light microscopy, and after the thin sections were stained with TEM (Hitachi HT 7800). Our findings show that the use of scopolamine does not cause a significant difference in light and electron microscopic levels in the liver, but the vacuol formation increase was detected in some samples of the scopolamine group. However, hepatocyte integrity, shape and general tissue morphology were well preserved. However, our data should be supported by detailed studies.

Keywords

Liver, Scopolamine

Yaşlı sıçanlarda skopolamin kullanımının karaciğer dokuları üzerine morfolojik ve ultrayapısal etkilerinin değerlendirilmesi

Abstract

Özet: Skopolamin güçlü antikolinerjik etkileri olan doğal bir bitki alkaloididir. Muskarinik reseptörleri rekabetçi bir şekilde inhibe eder ve hem periferik antimuskarinik etkiler, hem de merkezi sedatif, antiemetik ve amnezik etkiler üretir. Uzun yıllardır bulantı, hareket hastalığı, alerjik rinit, duodenal ülser hastalığı, gastrointestinal rahatsızlık ve spazm, fonksiyonel bağırsak sendromu ve hiperaktif mesane tedavisinde antiemetik, antisekretuar ve antispazmotik ajan olarak kullanılmaktadır. Skopolamin, karaciğer tarafından metabolize edilir, ancak genellikle sadece kısa süreler için düşük dozlarda (<1 mg) verilir. Karaciğer veya böbrek hastalığı olan hastalar skopolamini metabolize edemez veya idrarla atamazlar. Böyle durumlarda skopolamin kullanımı düşünülürken yan etkilerin artacağı kabul edilmelidir. Uzun yıllar boyunca yaygın olarak kullanılmasına rağmen, skopolamin karaciğer enzimi yükselmesi veya klinik olarak görünen karaciğer hasarı ile ilişkilendirilmemiştir. Bununla beraber kullanımı durumunda karaciğer dokularındaki etkilerine dair kısıtlı çalışma bulunmaktadır. Karaciğer patolojisi çalışmalarında özellikle geçirimli elektron mikroskopisinin (TEM) önemli bir bileşen olduğu düşünülmektedir.
Bu çalışmadaki amacımız skopolamin kullanımının karaciğerde herhangi bir değişime neden olup olmadığını ışık ve elektron mikroskopisi yardımı ile değerlendirebilmektir. Bu amaçla, 20 Wistar Albino erkek yaşlı sıçan kullanılmıştır. Sıçanlar randomize olarak iki gruba ayrılmış ve Skopolamin HBr (Sigma), %0,9 salinde çözülerek hazırlanmıştır. Kontrol gruplarına 3 hafta süreyle 0.1 ml/kg oral gavajla serum fizyolojik, deneylerden 30 dk önce intraperitoneal olarak 0.1 ml/kg serum fizyolojik verilmiştir. Deney gruplarına ise 3 hafta süreyle oral gavajla 0.1 ml/kg serum fizyolojik, deneylerden 30 dk önce intraperitoneal olarak 1mg/kg skopolamin uygulanmıştır. Süre bitiminde hayvanlardan anestezi altında 1mm3 boyutlarında karaciğer örnekleri alınmış ve dekapitasyon uygulanmıştır. Fiksasyon prosedürünün ardından örneklere ışık ve elektron mikroskobik takip işlemleri yapılmıştır. Elde edilen bloklardan ultramikrotomla alınan yarı ince kesitler ışık mikroskopisi ile, tam ince kesitler ise boyandıktan sonra TEM (Hitachi HT 7800) ile incelenmiştir. Bulgularımız skopolamin kullanımının karaciğerde ışık ve elektron mikroskobik düzeyde önemli bir farklılığa neden olmadığını, ancak skopolamin kullanılan grubun bazı örneklerinde koful artışının tespit edildiğini göstermektedir. Ancak hepatosit bütünlüğü, şekli ve genel doku morfolojisinin iyi korunduğu gözlenmiştir. Bununla beraber verilerimizin ayrıntılı çalışmalarla desteklenmesi gerekmektedir.

Keywords

Karaciğer, Skopolamin

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