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Consistency of a dialyzable leucocyte extract manufactured at GMP facilities by nuclear magnetic resonance spectroscopy. | LitMetric

Consistency of a dialyzable leucocyte extract manufactured at GMP facilities by nuclear magnetic resonance spectroscopy.

J Pharm Biomed Anal

Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Colonia Santo Tomás, Ciudad de México, 11340, Mexico. Electronic address:

Published: March 2021

AI Article Synopsis

Article Abstract

The present work describes the development and validation of a first report including several non-invasive NMR schemes to identify parameters as local chemical environments, homo- and heteronuclear site-specific spin correlations, diffusion coefficient-dependent polydispersity indexes and quantification of identified peptide entities that composes a commercial human Dialyzable Leucocyte Extract (DLE), Transferon, an oral liquid formulation of low-molecular-weight peptides. The above parameters were useful indicators to verify reproducibility, consistency and homogeneity among the DLE batches manufactured at Good Manufacturing Practice (GMP) facilities and for batch-releasing purposes in a quality control laboratory. The results showed that peptide identity of the DLE is represented with both high reproducible one-dimensional proton spectra and diffusion coefficient distributions that predicts in turn a weight-average molecular weight of around 6.7-7.4 kDa and a mean polydispersity index of 1.13. The obtained NMR peptide fingerprint of the analyzed DLE allowed to i) confirm its structural homogeneity by line-shape analysis, ii) identify and quantify its peptide content within the total solution with qNMR methods iii) to confirm the robustness of the technique as a feasible alternative for routine analysis of Natural or non-Natural Complex Drugs, such as DLEs.

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Source
http://dx.doi.org/10.1016/j.jpba.2021.113940DOI Listing

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