Novel mucoadhesive nasal inserts based on chitosan/hyaluronate polyelectrolyte complexes for peptide and protein delivery.
OBJECTIVE
The purpose of this study was the preparation and characterisation of mucoadhesive nasal inserts based on chitosan/hyaluronate polyelectrolyte complexes prepared at various pHs and at different molar ratios.


METHODS
A suspension of chitosan/hyaluronate complexes with or without the model drugs (vancomycin or insulin) was lyophilised into small inserts. Complexation yield, FT-IR spectra and thermogravimetric analysis were used to study the degree of interactive strength between polyions. In-vitro swelling, mucoadhesion and release tests were performed in order to investigate delivery of vancomycin and insulin in the nasal cavity.


RESULTS
The results indicated that the selection of complex preparative conditions allows modulation of insert swelling and mucoadhesion ability. Nasal inserts containing vancomycin or insulin had showed completely different drug release behaviour.


CONCLUSIONS
Chitosan/hyaluronate polyelectrolyte complexes can be used for the formulation of mucoadhesive nasal inserts for the delivery of peptide and protein drugs.
Luppi
Barbara
B
Department of Pharmaceutical Sciences, Bologna University, Bologna, Italy. barbara.luppi@unibo.it
Bigucci
Federica
F
Mercolini
Laura
L
Musenga
Alessandro
A
Sorrenti
Milena
M
Catenacci
Laura
L
Zecchi
Vittorio
V
D000269:Adhesives / Q000737:chemistry / Q000378:metabolism*; D000281:Administration, Intranasal; D048271:Chitosan / Q000737:chemistry*; D016503:Drug Delivery Systems / Q000379:methods*; D006820:Hyaluronic Acid / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007328:Insulin / Q000493:pharmacokinetics; D009297:Nasal Mucosa / Q000187:drug effects / Q000378:metabolism*; D010455:Peptides / Q000008:administration & dosage* / Q000493:pharmacokinetics; D011506:Proteins / Q000008:administration & dosage* / Q000493:pharmacokinetics; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014640:Vancomycin / Q000493:pharmacokinetics; D014783:Viscosity; D014867:Water / Q000737:chemistry / Q000378:metabolism
D000269:Adhesives; D007328:Insulin; D010455:Peptides; D011506:Proteins; D014867:Water; D014640:Vancomycin; D006820:Hyaluronic Acid; D048271:Chitosan