Design and formulation of mucoadhesive microspheres of sitagliptin.

Mucoadhesive microspheres of sitagliptin (SITCM), a new anti-diabetic drug was prepared with carbopol 934 P using Buchi B-90 nano spray drier and optimized to analyse the key effects and relations of three factors on formulation of SITCM were studied. The appearance of the microspheres was found to be shriveled to nearly spherical, with a narrow size of 2-8 µm. The drug loading and percentage yield was found to be 73 ± 0.2% and 92 ± 0.3%, respectively. In vitro release indicated Korsmeyer-Peppas pattern mucoadhesion of SITCM-8 was found to be 7.8 ± 0.3 h. In vivo studies in rats suggest that the sitagliptin was retained in the gastrointestinal tract for an extended period of time (∼12 h) and control group was reduced significantly (∼4 h). This study concludes that the mucoadhesive microsphere could be one of the most appropriate drug delivery approaches for the successful delivery of sitagliptin.

Benzothiazole analogs as potential anti-TB agents: computational input and molecular dynamics.

Biotin is very important for the survival of Mycobacterium tuberculosis. 7,8-Diamino pelargonic acid aminotransaminase (DAPA) is a transaminase enzyme involved in the biosynthesis of biotin. The benzothiazole title compounds were investigated for their in vitro anti-tubercular activity against two tubercular strains: H37Rv (ATCC 25,177) and MDR-MTB (multidrug-resistant M. tuberculosis, resistant to isoniazid, rifampicin, and ethambutol) by an agar incorporation method. The possible binding mode and predicted affinity were computed using a molecular docking study. Among the synthesized compounds in the series, the title compound {2-(benzo[d]thiazol-2-yl-methoxy)-5-fluorophenyl}-(4-chlorophenyl)-methanone was found to exhibit significant activity with minimum inhibitory concentrations of 1 µg/mL and 2 µg/mL against H37Rv and MDR-MTB, respectively; this compound showed the highest binding affinity (-24.75 kcal/mol) as well.