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Risk Assessment and QbD-Based Optimization of Sorafenib Tosylate Colon Targeted Bilayer Tablet: In Vitro Characterization, In Vivo Pharmacokinetic, and In Vivo Roentgenography Studies

  • Research Article
  • Advancements in Modified-release Oral Drug Delivery: Delivery Throughout the Gastro-intestinal tract
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Abstract

The employment of site-specific administration in colon is a promising technique to improve efficacy and reduce systemic side effects of anticancer medications used in colorectal cancer. However, the physiology of the gastrointestinal tract and colonic environment limit the efficient delivery of orally administered anticancer drugs to the colon. These prerequisites can be fulfilled by a release modulated colon targeted drug delivery system (CTDDS) based on pH-dependent chronotherapeutic bilayer tablet of sorafenib tosylate (ST). Quality by design (QbD) was used to examine the risk assessment. The Box–Behnken design was used to optimize the core uncoated bilayer tablet, whereas the 22 factorial design was used to optimize the coating process. The amount of croscarmellose sodium, Eudragit® RLPO, and tablet hardness all had a significant impact on disintegration time and drug release, according to the results of the core uncoated bilayer optimization. The amount of Eudragit® S 100 and PEG 400 in the final coated tablet had a considerable impact on drug release. The optimized formulation demonstrated 5-h lag time, a peculiar feature of CTDDS. The pharmacokinetic studies of coated tablet in rabbits showed lower Cmax (4.45 ± 0.40 µg/mL) and AUC (148.52 ± 3.96 h µg/mL), whereas Tmax was substantially delayed (8.0 ± 0.57 h) compared to core uncoated tablet. The tablet remained intact until it reached the colon (> 4 h), according to the in vivo roentgenography studies. The present study revealed that a QbD approach can be useful to develop a rugged and scalable CTDDS.

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Data Availability

On reasonable request, the corresponding author will provide the datasets used and/or analysed during the current work.

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Acknowledgements

The authors would like to thank Poona College of Pharmacy, Pune, for their help in providing facilities for this research. The authors would like to thank Cipla Pharmaceuticals Ltd. in India for supplying a free API sample.

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Contributions

Prathmesh Kenjale: conceptualization, study design, research, data collection, interpretation of data, analysis methodology, investigation, visualization, writing—original draft. Varsha Pokharkar: conceptualization, methodology, project administration, supervision, writing—review and editing.

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Correspondence to Varsha Pokharkar.

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The Committee for the Control and Supervision of Experiments on Animals authorized this animal research (CPCSEA). IAEC/PCP/PCT05/2019-2020 is the CPCSEA protocol number.

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The studies on which this study is based did not use any persons. The animal research was carried out in complete compliance with institutional and CPCSEA rules.

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Kenjale, P., Pokharkar, V. Risk Assessment and QbD-Based Optimization of Sorafenib Tosylate Colon Targeted Bilayer Tablet: In Vitro Characterization, In Vivo Pharmacokinetic, and In Vivo Roentgenography Studies. AAPS PharmSciTech 23, 184 (2022). https://doi.org/10.1208/s12249-022-02340-7

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