The Effects of Bisphenol A on the Distribution and Heterogeneity of Mast Cells in Rat Digestive Tract

Abstract

Bisphenol A (BPA) is a chemical component used in plastic products around the world. This study aims to examine the effects of these chemical compounds to which humans are frequently exposed in everyday life, on the heterogeneity and distribution of mast cells in the gastrointestinal system. For the study, 24 male Wistar albino rats were divided into 4 groups (control, sham, 25 mg/kg, and 50 mg/kg BPA treated). BPA was dissolved in corn oil and administration was done by oral gavage for thirty days. Gastrointestinal tissue samples taken from animals anesthetized with inhalation anesthesia were fixed using BLA (Basic Lead Acetate) and Carnoy fixation. Then, following routine tissue follow-up, they were blocked with Paraplast. Sections (6 µm) taken from the blocks were stained using Toluidine blue (TB) and Alcian blue-safranine O 8GX (AB-SO) combined dyes. Counting and statistical analysis of the mast cells in the TB-stained sections were performed. According to the results of the analysis, a higher number of mast cells was observed in the BLA fixation solution, while the increase in the number of mast cells was statistically significant in the groups treated with BPA (p<0.05). In the combined AB-SO 8GX staining results, AB (+), S (+), and Mix (+) mastocytes were found in almost all sections of the digestive tract. As a result of this staining process, again, no difference was found in the semi-quantitative evaluations performed including the groups treated with BPA. Although BPA does not affect the heterogeneity of mast cells, it does affect their distribution. Therefore, it is assumed that further studies will need to be carried out.

Keywords

• Mast cell
• Bisphenol A
• Gastrointestinal tract
• Heterogeneity

Bisphenol A'nın Rat Sindirim Kanalındaki Mast Hücrelerinin Dağılımı ve Heterojenitesi Üzerine Etkileri

Abstract

Bisphenol A (BPA) dünya genelinde plastik ürünlerinde çok yaygın olarak kullanılan kimyasal bir bileşendir. Bu çalışmanın amacı insanların gündelik hayatlarında oldukça sık olarak maruz kaldığı BPA’nın mast hücrelerinin heterojenite ve dağılımı üzerine etkilerinin araştırılmasıdır. Çalışma için 24 adet erkek Wistar Albino sıçan 4 gruba (Kontrol, Sham, 25mg/kg ve 50 mg/kg) ayrıldı. Bu grupların hepsine günlük standart diyet uygulanırken sham grubuna mısır yağı, diğer iki gruba ise (25mg/kg ve 50mg/kg) mısır yağı içerisinde çözündürülmüş olarak BPA 30 gün süre ile gavaj yoluyla verildi. İnhalasyon anestezik ile uyutulan deney hayvanlarından alınan sindirim kanalı doku örnekleri Basic Lead Acetate (BLA) ve Carnoy tespit solüsyonları kullanılarak tespit edildi. Ardından rutin doku takibi yapılarak paraplast ile bloklandılar. Bloklardan alınan 6 µm kalınlığındaki kesitler toluidine blue (TB) ve alcian blue-safranin O 8GX (AB/SO) kombine boyaları kullanılarak boyandı. TB ile boyanan kesitlerde mast hücrelerinin sayımı ve istatistiksel analizleri yapıldı. Analiz sonuçlarına göre BLA tespit solüsyonunda Carnoy tespitine oranla daha fazla sayıda mast hücresi gözlemlenirken, BPA uygulanan gruplarda mast hücre sayılarındaki artış istatistiksel olarak anlamlı bulundu (p<0.05). AB-SO 8GX kombine boyama sonuçlarında ise sindirim kanalının incelenen neredeyse her kesitinde AB (+), S (+) ve mix (+) mast hücrelerine rastlandı. Ancak S (+) ve mix (+) Mast hücrelerinin sayıları genel olarak bakıldığında AB (+) mast hücrelerine oranla oldukça düşüktü. Yine bu boyama metodu neticesinde BPA uygulanan gruplar da dahil olmak üzere yapılan semi kantitatif değerlendirmelerde bir fark tespit edilemedi. Sonuç olarak BPA’nın mast hücrelerinin heterojenitesine bir etkisi istatistiksel olarak tespit edilemese de dağılımlarına etkisi olduğu gözlendi. Bundan dolayı daha ileri çalışmaların yapılması gerektiği düşünülmektedir.

Keywords

• Mast hücresi
• Bisphenol A
• Gastrointestinal kanal
• Heterojenite

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