Journals / Ulusal Travma ve Acil Cerrahi Dergisi / 2011 / Cilt: 17 - Sayı: 2

Sıçan sırt deri flebinde losartanın etkisinin değerlendirilmesi

Evaluation of the effects of losartan on a random pattern skin flap model in rats

Pages
97–102
DOI
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CONCLUSION Losartan does not improve skin flap survival but it has a significant antiproliferative effect on fibroblasts.

📌 3 Key Takeaways

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Objective & Hypothesis:BACKGROUND Losartan, a drug with antiinflammatory properties, has been shown to prevent ischemic injury in various organs.
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Key Findings & Data:METHODS A 3x9 cm dorsal flap was elevated in 24 Sprague-Dawley rats.
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Conclusion & Impact:CONCLUSION Losartan does not improve skin flap survival but it has a significant antiproliferative effect on fibroblasts.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

BACKGROUND Losartan, a drug with antiinflammatory properties, has been shown to prevent ischemic injury in various organs. The purpose of the present study was to investigate the effects of losartan on ischemic skin flaps and on flap survival. METHODS A 3x9 cm dorsal flap was elevated in 24 Sprague-Dawley rats. Rats received the following treatment for seven days: Group I (n=8): 10 mg/kg losartan; Group II (n=8): 40 mg/ kg losartan; and Group III (n=8): nonionized water. At the end of the seventh day, the viable flap areas were calculated, and histological analysis was conducted to count cells and capillaries in microscopic fields. RESULTS Mean flap survival was 61%, 56% and 60% in Groups I, II and III, respectively. Comparison of flap survival between groups did not yield any significant difference (p>0.05). Ischemic zones of the flaps in all groups demonstrated an increase in number of neutrophils, fibroblasts and capillaries (p<0.05), whereas no difference was seen in mast cells. The cell counts in the viable areas of the flaps showed a significant decrease in fibroblasts in the group treated with 40 mg/kg losartan (p<0.05). The number of neutrophils, mast cells and capillaries was not influenced by treatment. CONCLUSION Losartan does not improve skin flap survival but it has a significant antiproliferative effect on fibroblasts.

Özet

AMAÇ Losartanın enflamasyonu baskılayarak çeşitli organlarda iskemi-reperfüzyon hasarını azalttığı ve enfarkt alanını küçülttüğü ortaya konmuştur. Bu çalışma, losartanın deri fleplerindeki iskemik bölgeye ve flep sürvisine etkisini ortaya koymak amacıyla planlandı. GEREÇ VE YÖNTEM Sprague-Dawley sıçanlarda (n=24) 3x9 cm boyutlarında kaudal pediküllü sırt flebi kaldırıldı. Sıçanlar 3 gruba ayrılarak 1. gruba 10 mg/kg, 2. gruba 40 mg/kg losartan ve 3. gruba distile su verildi. Yedi günlük tedavinin sonunda fleplerdeki canlı doku alanı hesaplanarak gruplar arasında karşılaştırıldı. Ek olarak fleplerin proksimal ve iskemik bölgelerinde nötrofiller, fibroblastlar, mast hücreleri ve kapillerler sayıldı. BULGULAR Fleplerdeki canlı doku alanları ortalaması 1., 2. ve 3. gruplarda sırasıyla %61, %56 ve %60 olarak hesaplandı. Gruplar flep sağkalımı açısından karşılaştırıldığında anlamlı fark bulunmadı (p>0,05). Tüm gruplarda fleplerin iskemik bölgesinde nötrofil, fibroblast ve kapillerlerde anlamlı artış saptanırken (p<0,05), mast hücre sayısında fark bulunmadı. 40 mg/kg losartan ile tedavi alan grupta fleplerin yaşayan bölgesinde fibroblast sayısı anlamlı olarak azaldı (p<0,05). Nötrofil, mast hücreleri ve kapiller sayıları ise tedaviden etkilenmedi. SONUÇ Losartan sıçan sırt deri flebinin sürvisini arttırmamakta ancak fibroblastlar üzerine anlamlı antiproliferatif etkisi bulunmaktadır.

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Cite This Article

ÖZTÜRK, C. N., TEZEL, E., YALÇIN, Ö. (2011). Sıçan sırt deri flebinde losartanın etkisinin değerlendirilmesi. Ulusal Travma ve Acil Cerrahi Dergisi, Cilt: 17 - Sayı: 2, 97–102. https://ajindex.com/articles/324748

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