Journals / Journal of Turkish Spinal Surgery / 2008 / Cilt: 19 - Sayı: 4

The effect of cis-4-hydroxy-L-proline on postlaminectomy epidural fibrosis

Laminektomi sonrası gelişen epidural fibrozisin önlenmesi üzerine cis-4-hidroksi-L-prolin’in etkileri

Pages
355–372
DOI
—
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AI Summary & Key Takeaways

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

As compared with control and HEMA hydrogel groups, the significant antifibrotic effect was found in our experimental group in point of nerve root entrapment and sublaminar fibrosis and the results were confirmed the usefulness of cis-4-hydroxy-L-proline hydrogel in predicting the degree of postlaminectomy epidural fibrosis.

📌 3 Key Takeaways

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Objective & Hypothesis:Previous clinical studies have demonstrated a significant association between the presence of postlaminectomy fibrous tissue formation and the recurrence of low back and radicular pain.
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Key Findings & Data:Many materials have previously demonstrated to inhibit epidural fibrosis after laminectomy in animal models.
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Conclusion & Impact:As compared with control and HEMA hydrogel groups, the significant antifibrotic effect was found in our experimental group in point of nerve root entrapment and sublaminar fibrosis and the results were confirmed the usefulness of cis-4-hydroxy-L-proline hydrogel in predicting the degree of postlaminectomy epidural fibrosis.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Fibroz · Hidroksiprolin · Laminektomi

Abstract

Previous clinical studies have demonstrated a significant association between the presence of postlaminectomy fibrous tissue formation and the recurrence of low back and radicular pain. Many materials have previously demonstrated to inhibit epidural fibrosis after laminectomy in animal models. As known, several structural analogues of proline have been shown to be incorporated into proteins in place of proline. As a consequence, the proliferation of cells in culture and the extracellular deposition of collagen in animal systems are reduced. The current study was designed to measure the effect of cis-4- hydroxy-L-proline (cis-4-OH-L-proline) on postlaminectomy epidural fibrosis development in a rat model. L4 laminectomy was performed on 150-200 gr weightened 27 rats. 6 rats were excluded from statistical analysis for different reasons (3 for macroscopic evaluation, 2 for sliding of hydrogel from the operation level, 1 for exitus). There were no complications after surgery and no neurological deficits were seen. Exposed dura at L4 level was covered with following: 1. Control group 2. Hydroxyethylmetacrylate (HEMA) hydrogel 3. cis-4-hydroxy-Lproline+ HEMA hydrogel. 3 weeks after surgery, the rats were sacrified and at L4 level, the spinal columns were harvested, decalcified and tranverse sections were prepared with hematoxcylin-eosin and Masson’s trichrome stains for histologic analysis. The transverse sections were evaluated for epidural fibrosis development by light microscopy and the epidural fibrotic areas were measured with Zeiss Axioskop visual analysis morphometry program in computer. As compared with control and HEMA hydrogel groups, the significant antifibrotic effect was found in our experimental group in point of nerve root entrapment and sublaminar fibrosis and the results were confirmed the usefulness of cis-4-hydroxy-L-proline hydrogel in predicting the degree of postlaminectomy epidural fibrosis.

Özet

Önceki klinik çalışmalar, bel ağrısı ve radiküler tip ağrının rekürrensinin; laminektomi sonrası gelişen epidural fibröz dokunun oluşumuyla belirgin derecede beraberlik gösterdiğini ortaya koymuştur. Hayvan modellerinde epidural fibrozisi önlemek amacıyla daha önceden bir çok materyal kullanılmıştır. Bilindiği üzere prolinin birçok yapısal analoğu; protein yapıda prolin ile yer değiştirmekte ve bunun sonucunda hücre kültürlerinde ve hayvan sistemlerinde hücre dışı kollajenin birikimi azalmaktadır. Bu çalışma sıçan modelinde laminektomi sonrası gelişen epidural fibrozis üzerine cis-4-hidroksi-L-prolin’in (cis-4-OH-L-prolin) etkisini ölçmek amacıyla hazırlanmıştır. Ağırlıkları 150-200 gram arası değişen 27 sıçana L4 laminektomi yapılmıştır. 6 sıçan çeşitli nedenlerle istatistiksel değerlendirmeden çıkartılmıştır (3 tanesi makroskopik değerlendirme, 2 tanesinde hidrojelin operasyon sahası dışına kayması ve 1 tanesinin de ölmesi nedeniyle). Cerrahi sonrası komplikasyon gelişmemiş ve herhangi bir nörolojik defisit gözlenmemiştir. Açığa çıkarılan dura üzerine aşağıda sıralanan maddeler konmuştur: 1. Hiçbir Kontrol grubu 2. Hidroksietilmetakrilat (HEMA) hidrojel 3. cis-4-hidroksi-L-prolin+ HEMA hidrojel. Cerrahiden 3 hafta sonra sıçanlar sakrifiye edilerek L4 düzeyinde spinal kolonlar çıkarılarak dekalsifiye edilmiş ve transvers kesitler alınarak hematoksilin-eozin ve Masson’un trikrom boyalarıyla histolojik değerlendirme için hazırlanmıştır. Transvers kesitler ışık mikroskobunda epidural fibrozis gelişimi yönünden değerlendirilmiş ve ayrıca epidural fibrozis alanları Zeiss Axioskop görüntü analiz morfometri programıyla bilgisayarda ölçülmüştür. Kontrol ve HEMA hidrojel gruplarıyla kıyaslandığında, deney grubumuzda sinir kökü tutulumu ve sublaminar fibrozis yönünden belirgin derecede antifibrotik etkinin oluştuğu bulunmuştur. Bu sonuç laminektomi sonrası epidural fibrozisin azaltılmasına yönelik cis-4-hidroksi-L-prolin hidrojelin kullanılabilirliğini göstermektedir.

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Cite This Article

SABUNCUOĞLU, H., BAVBEK, M., GÜRPINAR, Ö. A., ONUR, M. A., KÖSE, K., SABUNCUOĞLU, B. (2008). The effect of cis-4-hydroxy-L-proline on postlaminectomy epidural fibrosis. Journal of Turkish Spinal Surgery, Cilt: 19 - Sayı: 4, 355–372. https://ajindex.com/articles/271516

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