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Pharmaceutical Nanotechnology

Editor-in-Chief

ISSN (Print): 2211-7385
ISSN (Online): 2211-7393

Research Article

Nanoparticulate Mycophenolic Acid Eye Drops - Analytical Validation of a High Performance Liquid Chromatography Assay and Stability Studies

Author(s): Ali Al-Kulabi, Louis Gooden and Ijeoma F. Uchegbu*

Volume 9 , Issue 2 , 2021

Published on: 11 January, 2021

Page: [101 - 110] Pages: 10

DOI: 10.2174/2211738509666210111161110

Price: $65

Abstract

Background: Mycophenolic acid (MPA), an immunosuppressive agent, is used orally to reduce corneal graft rejection. However, its oral use is associated with gastrointestinal side effects.

Objectives: This study aims to prepare: MPA nanoparticle eye drops and a validated analytical method.

Methods: Aqueous MPA eye drops were prepared by nanoencapsulation of MPA using nanomerics MET (N-palamitoyl-N-monomethyl-N,N-dimethyl-N,N,N-trimethyl-6-O-glycolchitosan) at a MET and MPA ratio of 7.5: 1 g g-1 in the presence of glycerol (2.75% w/w). A validated MPA formulation drug substance assay was then conducted.

Results: MET-MPA formulations were prepared as well as a validated assay. Assay validation parameters for the analysis of MPA in the formulation were satisfactory [Plate count = 16458, capacity Factor = 2.4, Tailing Factor = 1.02, linearity = 0.999 (0.016-0.5 mg mL-1), limit of detection = 0.056 mg mL-1, limit of quantification = 0.17 mg mL-1, accuracy = 98%, intraday and interday relative standard deviation = 0.45% and 4% respectively]. The candidate formulation (z-average mean = 66 ± 0.4 nm, polydispersity index = 0.12 ± 0.012, drug content = 1.14 ± 0.003 mg mL-1, zeta potential = +8.5 ± 1.4 mV, pH = 7.4 ± 0.02, osmolarity = 309 ± 1.5 mOSm L-1, viscosity = 1.04 ± 0.001 mPa.s) was then found to be stable for 14 days with respect to drug content at refrigeration, room and accelerated (40ºC) temperature. All other formulation parameters were within the ocular comfort range.

Conclusion: A validated assay (ICH and US FDA guidelines) for new MPA nanoparticle eye drops has been developed.

Keywords: Eye drops, mycophenolic acid, liquid chromatography, analytical validation, drug, nanotechnology.

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