Journals / Veteriner Bilimleri Dergisi . Eurasian Journal of Veterinary Sciences / 2008 / Cilt: 24 - Sayı: 1

Immünohistochemical determination of aB-crystallin distribution in the dog central nervous system

Köpeklerin merkezi sinir sisteminde aB-kristallin dağılımının immünohistokimyasal teknikle belirlenmesi

Pages
59–67
DOI
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AI Summary & Key Takeaways

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

As observed in oligodendrocytes of normal dog CNS tissues, aB-crystallin may have roles in anti-apoptotic process of oligodendrocytes and prevention false folding of proteins such as myelin basic protein, which is synthesized intensively by oligodendrocytes.

📌 3 Key Takeaways

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Objective & Hypothesis:aB-Crystallin is one of two subunits of multimeric protein a-crystallin (aAand aB), which is a major component of the lens.
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Key Findings & Data:In double staining of aB-crystallin and 2',3'-cyclic nucleotide 3'-phosphodiesterase (CNPase), the immunoreactive glial cells were determined to be CNPase positive as oligodendrocytes.
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Conclusion & Impact:As observed in oligodendrocytes of normal dog CNS tissues, aB-crystallin may have roles in anti-apoptotic process of oligodendrocytes and prevention false folding of proteins such as myelin basic protein, which is synthesized intensively by oligodendrocytes.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:kristalimsi · antijenler · lokalizasyon

Abstract

aB-Crystallin is one of two subunits of multimeric protein a-crystallin (aAand aB), which is a major component of the lens. As a molecular chaperon and heat shock protein, aB-Crystallin prevents false protein folding and has anti-apoptotic properties. In this study, aB-crystallin expression was investigated in the central nervous system (CNS) using the tissues collected from the cerebrum, cerebellum, olfactory bulb, pituitary gland, medulla oblongata, cornu ammonis, hypothalamus and cervical spinal cord. Except in the pituitary, aB-crystallin immunolocalized in glial cells in all nervous tissues investigated. No immunoreactivity was observed in neurons. In double staining of aB-crystallin and 2',3'-cyclic nucleotide 3'-phosphodiesterase (CNPase), the immunoreactive glial cells were determined to be CNPase positive as oligodendrocytes. Immunoreactive oligodendrocytes located mainly the in the white matter and the layers of the gray matter adjacent to the white matter. However, the spinal cord had numerous aB-kristallin positive oligodendrocytes both in the white and gray matters. In the white matter of the spinal cord, a limited number of glial cells were positive for aB-crystallin, but negative for CNPase. aB-Crystallin immunoreactivity was weak in cytoplasm but very light in the nucleus. As observed in oligodendrocytes of normal dog CNS tissues, aB-crystallin may have roles in anti-apoptotic process of oligodendrocytes and prevention false folding of proteins such as myelin basic protein, which is synthesized intensively by oligodendrocytes.

Özet

Polipeptid yapısında olan aB-Kristallin, lensin ana bileşenlerinden multimerik protein a-kristallin iki alt ünitesinden (aA ve aB) birisidir. aB-Kristallin, moleküler şaperon ve ısı şok proteini olarak protein katlanmalarındaki yanlışları önler ve anti-apoptotik özellikleri vardır. Bu çalışmada, aB-kristallinin köpek merkezi sinir sistemi (MSS)'ndeki ekspresyonu; beyin, beyincik, bulbus olfaktorius, hipofiz, medulla oblongata, ammon boynuzu, hipotalamus ve servikal omurilikten alınan doku örneklerinde immünohistokimyasal teknikle incelendi. aB-kristallin ekspresyonuna, hipofiz hariç incelenen tüm MSS bölgelerinde glial hücrelerde rastlandı. Nöronlarda ise pozitif reaksiyon gözlenmedi. aB-Kristallin/ 2',3'-siklik nükleotid 3'-fosfodiesteraz (CNPase) ikili immünohistokimyasal boyamada, immünoreaktif glia hücrelerinin CNPase pozitif oligodendrositler oldukları belirlendi ve kristallin immünoreaktivitesine özellikle ak madde ve boz maddenin ak maddeye yakın katmanlarındaki oligodendrositlerde rastlandı. Omurilik beyaz ve boz maddesinde oldukça fazla sayıda aB-kristallin pozitif oligodendrositler saptanırken; ak maddede oldukça sınırlı sayıda aB-kristallin pozitif, CNPase negatif glia hücreleri gözlendi. aB-Kristallin immünoreaktivitesi hücrelerin sitoplazmalarında yoğun, çekirdeklerinde ise daha zayıftı. Bu çalışmada, normal köpek MSS'nde özellikle oligodendrositlerde saptanan aB-kristallin'in, myelin temel proteini gibi oligodendrositler tarafından yoğun olarak sentezlenen fonksiyonel proteinlerin yapısının korunmasında görev alabileceği sonucuna varıldı.

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Cite This Article

KARAHAN, S., GÜVENÇ, T. (2008). Immünohistochemical determination of aB-crystallin distribution in the dog central nervous system. Veteriner Bilimleri Dergisi . Eurasian Journal of Veterinary Sciences, Cilt: 24 - Sayı: 1, 59–67. https://ajindex.com/articles/333292

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