4.7 Article

In Silico and In Vitro Tailoring of a Chitosan Nanoformulation of a Human Metabolic Enzyme

Journal

PHARMACEUTICS
Volume 13, Issue 3, Pages -

Publisher

MDPI
DOI: 10.3390/pharmaceutics13030329

Keywords

chitosan; molecular modelling; enzyme therapeutics; self-assembly; nanoencapsulation; human phenylalanine hydroxylase

Funding

  1. FEDER
  2. Fundacao para a Ciencia e a Tecnologia, I. P. [UIDB/04138/2020, UIDP/04138/2020, PTDC/QUI/64023/2006, PTDC/EBB-BIO/101237/2008, SFRH/BSAB/1210/2011, SFRH/BD/47946/2008]
  3. National PKU Alliance, USA
  4. Fundação para a Ciência e a Tecnologia [SFRH/BSAB/1210/2011, SFRH/BD/47946/2008, PTDC/EBB-BIO/101237/2008, PTDC/QUI/64023/2006] Funding Source: FCT

Ask authors/readers for more resources

Enzyme nanoencapsulation using a chitosan-based delivery system successfully encapsulated a complex human metabolic enzyme, providing a significant framework for enzyme formulation.
Enzyme nanoencapsulation holds an enormous potential to develop new therapeutic approaches to a large set of human pathologies including cancer, infectious diseases and inherited metabolic disorders. However, enzyme formulation has been limited by the need to maintain the catalytic function, which is governed by protein conformation. Herein we report the rational design of a delivery system based on chitosan for effective encapsulation of a functionally and structurally complex human metabolic enzyme through ionic gelation with tripolyphosphate. The rationale was to use a mild methodology to entrap the multimeric multidomain 200 kDa human phenylalanine hydroxylase (hPAH) in a polyol-like matrix that would allow an efficient maintenance of protein structure and function, avoiding formulation stress conditions. Through an in silico and in vitro based development, the particulate system was optimized with modulation of nanomaterials protonation status, polymer, counterion and protein ratios, taking into account particle size, polydispersity index, surface charge, particle yield production, protein free energy of folding, electrostatic surface potential, charge, encapsulation efficiency, loading capacity and transmission electron microscopy morphology. Evaluation of the thermal stability, substrate binding profile, relative enzymatic activity, and substrate activation ratio of the encapsulated hPAH suggests that the formulation procedure does not affect protein stability, allowing an effective maintenance of hPAH biological function. Hence, this study provides an important framework for an enzyme formulation process.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available