Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Synthesis and Characterization of Thiolated Gum Ghatti as a Novel Excipient: Development of Compression Coated Mu-Coadhesive Tablets of Domperidone

Version 1 : Received: 8 February 2021 / Approved: 10 February 2021 / Online: 10 February 2021 (09:42:12 CET)

How to cite: Puri, V.; Sharma, A.; Kumar, P.; Singh, I.; Huanbutta, K. Synthesis and Characterization of Thiolated Gum Ghatti as a Novel Excipient: Development of Compression Coated Mu-Coadhesive Tablets of Domperidone. Preprints 2021, 2021020248 (doi: 10.20944/preprints202102.0248.v1). Puri, V.; Sharma, A.; Kumar, P.; Singh, I.; Huanbutta, K. Synthesis and Characterization of Thiolated Gum Ghatti as a Novel Excipient: Development of Compression Coated Mu-Coadhesive Tablets of Domperidone. Preprints 2021, 2021020248 (doi: 10.20944/preprints202102.0248.v1).

Abstract

Background: Mucoadhesive polymers represent a major part of site-specific and localized retention strategies in oral drug delivery. Present research was designed to synthesize and characterize a novel mucoadhesive carbohydrate polymer (thiolated gum ghatti; TGG) which was further employed to fabricate mucoadhesive tablets of domperidone using an industrially viable compression coating technique. Methods: Thiolation of gum ghatti was achieved by the ester formation (esterification) between hydroxyl group and carboxyl group of gum ghatti and thioglycolic acid. Results: TGG was characterized by various physico-chemical techniques such as FTIR, XRD, SEM and DSC techniques. In rheological studies, the observed viscosities of pure gum-mucin were 45.45 and 71.75 mPas and that of thiolated gum were 78.7 and 112.58 mPas respectively in water and simulated gastric fluid. Signifi-cant increase in viscosity for thiolated gum may be attributed to increased macromolecular interactions responsible for enhanced mucoadhesive potential of thiolated gum. In-silico studies corroborate the role of mucin gum interaction and energetic stabilization for en-hanced mucoadhesion properties of thiolated gum. Ex-vivo mucoadhesion strength of gum ghatti and thiolated gum ghatti coated tablets was found to be ranging between 4.67± 0.79 to 8.99± 0.75 g and 11.76± 1.34 to 18.83± 2.07 g respectively. Conclusion: Thiolated gum ghatti may be regarded as a promising polymer for developing different mucoadhesive drug delivery systems.

Subject Areas

gum ghatti; thiolation; mucoadhesion; tablet; compression coating

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