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Current Drug Delivery

Editor-in-Chief

ISSN (Print): 1567-2018
ISSN (Online): 1875-5704

Research Article

Extraction, Purification, and Development of Sublingual Film (SLIT Films) Comprising Cockroach Allergen for Treatment of Allergy

Author(s): Leishangthem Anita, Venkatesh D. P*, Sajeev Kumar B, Paranjothy Kanni, Chandramouli Ramnarayanan, Roopa Karki, Nagendra Prasad Komarla and Suresh Janadri

Volume 20, Issue 6, 2023

Published on: 22 August, 2022

Page: [807 - 817] Pages: 11

DOI: 10.2174/1567201819666220617122411

Price: $65

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Abstract

Aim: Allergy associated with cockroaches are mostly from the American cockroach (Periplaneta americana) and German cockroach (Blattella germanica). The effective and safe treatment for cockroach allergy is Sublingual immunotherapy (SLIT). In this study, SLIT Films containing purified allergen extract of Periplaneta americana were prepared by solvent casting and were evaluated for their efficiency in delivery.

Methodology: Cockroach allergen extract was prepared and purified by ultrafiltration and chromatography. The molecular weight of protein content was identified and estimated by SDS- PAGE and ELISA. SLIT films were developed by the Quality by Design (QbD) approach and were evaluated for allergen- excipient compatibility, swelling index, taste, diffusion, in vitro dissolution, local toxicity, and stability analysis.

Results: Cockroach allergen protein extracts (cut-off 25-71KDa) were identified by SDS-PAGE and quantified by indirect ELISA and further selected for sublingual film preparation. The indirect ELISA results show a higher optical density (OD) value compared to crude extract. The weight uniformity and thickness of the film were between 13-18 mg and 0.04-0.06 mm. The disintegration time was found to be less than 1 min. The cumulative percentage release was also found to be satisfactory. The local toxicity study indicated no signs of irritation in the buccal mucosa of rabbits. The optimised F3 film had uniform thickness, faster disintegration and drug content within pharmacopeial limits. Ex vivo study revealed better permeability with 90% release of allergen in 7 minutes. The formulation was also stable at room temperature during the study period.

Conclusion: SLIT Film containing cockroach allergen from Periplaneta americana was successfully developed and evaluated. SLIT films of cockroach allergen could be more beneficial and convenient for emergency use in patients when compared to subcutaneous immunotherapy. SLIT films provide dose accuracy and are a promising alternative for SCIT and SLIT drops and tablets.

Keywords: Sublingual Film, Allergen, Allergy, American cockroach, Cockroach extract, Sublingual Immunotherapy

Graphical Abstract

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