Browsing by Author "Pawan Kumar Pandey"

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Inorganic clay nanocomposite system for improved cholinesterase inhibition and brain pharmacokinetics of donepezil
(Taylor and Francis Ltd., 2020) Anurag Kumar Singh; Sunil Kumar Mishra; Gaurav Mishra; Anand Maurya; Rajendra Awasthi; Mukesh Kumar Yadav; Neelam Atri; Pawan Kumar Pandey; Santosh Kumar Singh
Objective: Brain drug delivery for effective treatment of neurodegenerative disorders is limited due to the selective permeability of blood brain barrier (BBB). During the past few years, development of novel delivery system has attracted considerable attention of formulation scientists to overcome the permeability limitation caused by BBB. Significance: Based on the outcomes of this study and taking into consideration of the unique characteristics of laponite, it can be further explored to deliver many other central nervous system acting drugs. Methods: In the present study, laponite (LAP) nanocomposites were exploited for the improved brain delivery of donepezil (DZ) following encapsulation approach due to their nano-size and positive charge at pH <9. Result: The size of prepared nanocomposites was 53.7 ± 4.0 to 137.7 ± 11.0 nm. The drug was released in a sustained manner till 120 h in phosphate buffer saline (pH 7.4) and acid phthalate buffer (pH 4.0). LAPDZ formulations inhibited acetylcholinesterase approximately by 82%, significantly higher (p < 0.05) than plain DZ (30%). Swiss albino mice exhibited enhanced brain uptake of LAPDZ administered via intravenous route. Promising pharmacokinetic parameters were observed in animals treated with LAPDZ. LAPDZ formulation showed half-life (t1/2), volume of distribution (Vd) and clearance (Cl) as 5.53 ± 0.40 h−1, 0.129 ± 0.02 L, 0.015 ± 0.002 L/h, respectively. While DZ solution showed the same parameters as 1.06 ± 0.12 h−1, 0.168 ± 0.01 L, 0.106 ± 0.013 L/h, respectively. The brain uptake of LAPDZ formulation was improved with quintuplet t1/2. Conclusion: Based on the results of present study, it is proposed that the formulated nanocomposite would result in improved patient compliance with therapeutic effect at lower doses. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.
Targeting biosignatures of hyperglycemia and oxidative stress in diabetes comorbid depressive rats: effectiveness of hydroethanolic extract of the whole plant of Ludwigia octovalvis
(TMR Publishing Group, 2023) Stuti Pandey; Pawan Kumar Pandey; Alakh Niranjan Sahu; Himanshu Verma; Manmath Kumar Nandi
Background: The prime objective of the current research was to evaluate the whole plant hydroalcoholic extract of Ludwigia octovalvis (HLO) against hyperglycemia, and oxidative stress biomarkers in rats induced with diabetes comorbid depression, diabetes comorbid depression (streptozotocin-nicotinamide + electric footshocks). Methods: 2,2-Diphenyl-1-picrylhydrazyl assay of HLO versus ascorbic acid was done. Effects of 200 and 400 mg/kg body weight/day HLO doses versus 25 mg/kg body weight/day metformin was studied through insulin, glucose, superoxide dismutase, lipid peroxidation, catalase, and behavioral assessment (forced swim and open field tests). Results: IC50 values of HLO and ascorbic acid were 33.52 and 27.86 µg/mL respectively. Both the HLO doses showed intended results with respect to oxidative stress biomarkers in diabetes comorbid depression rats in comparison to metformin. Open field test showed better results for HLO in diabetes comorbid depression rats. However, hypoglycemic effects, and forced swim test performance of metformin was slightly higher than the 400 mg dose, followed by the 200 mg dose of HLO. Ethyl gallate, gallic acid, β-sitosterol, and quercetin in HLO might resulted in attenuating diabetic as well as depression biomarkers. Conclusion: Inhibition of glucosidase and lipase activity, and AMP-activated protein kinase phosphorylation might be the possible biochemical changes occurred in HLO treated rats. © 2023 By Author(s). Published by TMR Publishing Group Limited.