The role of Platelet Rich Fibrin (PRF) membrane and conjunctival autograft on TGF-β and collagen type 1 expression in conjunctival wound healing: a literature review

Background: Plasma-rich fibrine (PRF) membrane is a new biomembrane useful in ocular surface reconstruction technique. Since its development, PRF membrane has been used successfully in many studies; however, some controversies maintained. This literature study aims to evaluate the role of Platelet Rich Fibrin (PRF) membrane and conjunctival autograft on TGF-β and collagen type 1 expression in conjunctival wound healing. Methods: This literature review compiles and elaborates on previous studies from many authors to support future experimental studies, which will be conducted to compare the effect of PRF membrane and conjunctival autograft on TGF-β and type 1 collagen expression. Results: PRF has many advantages, such as the ability to reduce inflammation, rich in growth factors, and can be a temporary scaffold for fibroblast migration. However, despite its advantages, PRF is not widely used, unlike its counterpart techniques, such as conjunctival autograft. Conjunctival autograft has long been used as an option for ocular surface reconstruction techniques, but it has some limitations. The conjunctival autograft technique cannot be performed in large or bilateral conjunctival damage. Thus, the PRF membrane technique can become a perfect solution for such a case. This literature review will provide more information on how PRF can regulate inflammation and support the conjunctival wound healing process. Conclusion: Some impacts of PRF membrane and conjunctival autograft are still unclear, especially their effect on TGF-β and type 1 collagen expression. This literature review is expected to encourage and support future experimental studies about the impact of PRF and conjunctival autograft on TGF-β and type 1 collagen expression.