Amyloid-Like Nanocoatings for Enhanced Hemoperfusion Materials

Area of Science:

• Biomaterials Engineering
• Surface Chemistry
• Renal Replacement Therapy

Background:

• Hemoperfusion materials (HPMs) require improved toxin adsorption and hemocompatibility for effective blood purification.
• Current surface engineering strategies for HPMs often lack facile, eco-friendly, and broadly applicable methods.
• Simultaneously enhancing adsorption capacity and hemocompatibility remains a key challenge in HPM development.

Purpose of the Study:

• To develop a facile and eco-friendly surface modification strategy for hemoperfusion materials (HPMs).
• To enhance both the adsorption performance and hemocompatibility of HPMs using a novel coating.
• To demonstrate the broad applicability of this surface engineering approach for various blood purification materials.

Main Methods:

• A one-step amyloid-mediated surface modification using phase-transitioned bovine serum albumin (PTB) aqueous solution.
• Encapsulation of hemoperfusion materials (HPMs) via immersion in the PTB solution.
• Characterization of the modified activated carbon for adsorption capacity and hemocompatibility.

Main Results:

• Amyloid-like PTB nanocoating increased urea and creatinine adsorption capacity by nearly four-fold.
• Enhanced adsorption observed for heavy metals (chromium), drugs (norfloxacin), and toxins (bilirubin, interleukin-6).
• Substantially improved hemocompatibility, including reduced debris, minimized blood cell damage, and less protein adsorption/platelet adhesion.

Conclusions:

• The proposed amyloid-mediated surface modification is a highly effective and general strategy for enhancing HPM performance.
• This approach offers significant clinical implications for improving blood purification therapies, particularly for chronic kidney disease.
• The method is broadly applicable to diverse HPMs, including activated carbon, resins, carbon nanotubes, and metal-organic frameworks.