Journals / Marmara Medical Journal / 2006 / Cilt: 19 - Sayı: 2

Hayatın erken döneminde karşılaşılan sosyal izolasyon stresi, koloninflamasyonunun şiddetini azaltır

Social isolation stress in the early life reduces the severity of colonic inflammation

Pages
65–72
DOI
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⚡ TL;DR(Too Long; Didn't Read)

Conclusion: Post-weaning isolation stress has a protective effect on colonic inflammation and does not exacerbate the colonic response to acute stressors.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: To investigate whether the early-life stress interact with a brief stress exposure and acute colonic inflammation in adulthood.
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Key Findings & Data:Methods: Female Sprague–Dawley rats on the postnatal 21st day were exposed to isolation stress until they reach 250 g.
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Conclusion & Impact:Conclusion: Post-weaning isolation stress has a protective effect on colonic inflammation and does not exacerbate the colonic response to acute stressors.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: To investigate whether the early-life stress interact with a brief stress exposure and acute colonic inflammation in adulthood. Methods: Female Sprague&#8211;Dawley rats on the postnatal 21st day were exposed to isolation stress until they reach 250 g. On the last 3 days with or without isolation, water-avoidance-stress (WAS) for 30 min/day or acetic acid(5 %) colitis were performed. After the last WAS or on the 4th day of colitis, rats were decapitated to collect serum for TNF-alpha levels, colonic tissues for histological analysis, myeloperoxidase activity (MPO), evidence of neutrophil infiltration, and glutathione (GSH) levels, a key antioxidant. Results: In the non-isolated and isolated groups, WAS and colitis both elevated the TNF-alpha, MDA levels and MPO activity compared to control (p<0.05-p<0.001). GSH levels were reduced in the non-isolated -WAS or -colitis groups and in the isolated-WAS group (p<0.01-0.001), while GSH level of the isolated-colitis group was not different than control. In the isolated-colitis group, MPO activity and microscopic scores were lower compared to non-isolated group (p<005-0.001). TNF-alpha levels were not different between non-isolated and isolated colitis groups. Conclusion: Post-weaning isolation stress has a protective effect on colonic inflammation and does not exacerbate the colonic response to acute stressors.

Özet

Amaç: Hayatın erken dönemindeki stresin, ileri yaştaki akut barsak inflamasyonu ve strese maruz kalma üzerine etkilerini araştırmak. Material Metod: Dişi Sprague–Dawley sıçanlara, doğum sonrası 21. günde, sosyal izolasyon stresi uygulandı. 250 g. ağırlığa ulaşılana dek beklendi. 60 günlük protokolün son 3 gününde, izole edilen, edilmeyen gruplara sudan kaçınma stresi (WAS) 30 dak./gün uygulandı. Sıçanların kalan yarısında ise izole olan, olmayan gruplara, kolona %5'lik asetik asit verilerek kolit oluşturuldu. Son WAS uygulamasından hemen sonra ya da kolit indüksiyonunun 4. gününde sıçanlar dekapite edilerek, TNF-alpha seviyelerinin ölçümü için kan, histolojik değerlendirme, doku myeloperoksidaz (MPO) aktivitesi, nötrofil infiltrasyonunun göstergesi, ölçümü ve glutatyon (GSH) seviyelerinin, antioksidan, ölçümü için kolon dokusu alındı. Bulgular: İzole olan, olmayan guruplarda, WAS ve kolit indüksiyonu serum TNF-alpha, doku MDA seviyelerini, MPO aktivitelerini kontrole göre anlamlı arttırmıştır (p<0.05-p<0.001). GSH seviyeleri izole olmayan grupta WAS ya da kolit indüksiyonu ile azalmış, fakat GSH izole grupta WAS sonrası azalırken (p<0.01-0.001), kolit sonrası kontrole göre değişiklik olmamıştır. Kolitli izole grupta, MPO aktivitesi ve mikroskobik hasar skorları, izole olmayan grupla karşılaştırıldığında anlamlı azalmıştır (p<005-0.001). TNF-alpha seviyeleri izole olan veya olmayan kolit gruplarında farklılık göstermemiştir. Sonuç: Sütten kesilme sonrasındaki sosyal izolasyon stresi kolit hasarından koruyucu etkili ve kolon inflamasyonunun stresle artışına yol açmaz.

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Cite This Article

İŞERİ, S. Ö., TAVSU, F., SAĞLAM, B., ERCAN, F., GEDİK, N., YEĞEN, B. Ç. (2006). Hayatın erken döneminde karşılaşılan sosyal izolasyon stresi, koloninflamasyonunun şiddetini azaltır. Marmara Medical Journal, Cilt: 19 - Sayı: 2, 65–72. https://ajindex.com/articles/284363

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