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Design and Evaluation of a Dual-Sensitive In Situ Gel for the Controlled Release of Pranoprofen

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Abstract

Currently, the marketed ophthalmic preparations of pranoprofen (PF) are mainly eye drops, but due to the special clearance mechanism of the eye and corneal reflex, the contact time between the drug and the focal site is short, most of the drug is lost, and the bioavailability is less than 5%. In the present study, an in situ gel eye drop containing no bacteriostatic agent and sensitive to temperature and ions was designed for delivery of PF. It was demonstrated to meet the criteria for ophthalmic preparations by characterization such as appearance content sterility. Ocular irritation tests showed a favorable safety profile. In vivo ocular retention time experiments showed that the ocular retention time of the pranoprofen gel was 4.41 times longer than that of commercially available drops (Pranopulin®), and the nasal tear excretion of the pranoprofen gel was lower than that of Pranopulin®, which suggests that the drug loss was reduced relative to that of the drops. The efficacy of the pranoprofen gel against tincture of cayenne pepper-induced corneal and conjunctival inflammation was examined using Pranopulin® as a control and in conjunction with inflammation scores, H&E slice results, and levels of IL-1β, IL-6, and TNF-α. The results showed that pranoprofen gel and Pranololin® had significant efficacy in the treatment of corneal and conjunctival inflammation, and the anti-inflammatory effect of pranoprofen gel was superior to that of Pranololin®. This study provides a new option for the treatment of corneal and conjunctival inflammation.

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Funding

This work was supported by the Scientific Research Project of the Liaoning Province Education Department (2020LJC16).

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Authors and Affiliations

  1. Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, People’s Republic of China

    Hongyu Yang, Shuihan Ding, Donghui Fan, Ziwei Zhu, Yingzhen Fan, Ji Li & Dongkai Wang

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Contributions

Hongyu Yang: data curation, formal analysis, investigation, writing—original draft, writing—review and editing. Shuihan Ding: formal analysis, investigation, visualization. Donghui Fan: data curation, formal analysis, investigation. Ziwei Zhu: formal analysis, investigation. Yingzhen Fan: data curation, investigation. Ji Li: writing—review and editing, visualization. Dongkai Wang: conceptualization, project administration, supervision, writing—review and editing.

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Yang, H., Ding, S., Fan, D. et al. Design and Evaluation of a Dual-Sensitive In Situ Gel for the Controlled Release of Pranoprofen. AAPS PharmSciTech 25, 35 (2024). https://doi.org/10.1208/s12249-024-02748-3

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