Fish Gelatin-Based Absorbable Dural Sealant with Anti-inflammatory Properties

Area of Science:

• Biomaterials Science
• Neurosurgery
• Inflammation Research

Background:

• Cerebrospinal fluid (CSF) leakage post-craniotomy is a frequent complication, leading to infections and delayed healing.
• Current dural sealants may have limitations in efficacy and inflammatory response.

Purpose of the Study:

• To develop and evaluate an absorbable, anti-inflammatory fish gelatin-based sealant for dura mater sealing.
• To prevent CSF leakage and associated complications.

Main Methods:

• Modified Alaska pollock gelatin (ApGltn) with alpha-linolenic acid (ALA) and cross-linked to create ALA-ApGltn sealant (ALA-Seal).
• Evaluated sealant properties including storage modulus, tangent delta, swelling ratio, and ex vivo burst strength using porcine dura mater.
• Assessed anti-inflammatory properties using brain microglial cells.

Main Results:

• ALA-Seal exhibited enhanced mechanical properties and a significantly lower swelling ratio compared to DuraSeal.
• Ex vivo burst strength of ALA-Seal was comparable to DuraSeal.
• ALA-Seal demonstrated superior anti-inflammatory effects with minimal impact on cell viability compared to DuraSeal and Org-Seal.

Conclusions:

• ALA-Seal presents a potential alternative dural sealant with improved anti-inflammatory characteristics and favorable mechanical properties.
• The sealant's low swelling and comparable burst strength suggest efficacy in preventing CSF leakage.
• This fish gelatin-based sealant may reduce post-craniotomy complications.