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A Pharmacokinetic Evaluation of a Pectin-Based Oral Multiparticulate Matrix Carrier of Carbamazepine. Adv Pharmacol Pharm Sci 2021; 2021:5527452. [PMID: 34286279 PMCID: PMC8275414 DOI: 10.1155/2021/5527452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 04/19/2021] [Accepted: 06/23/2021] [Indexed: 12/16/2022] Open
Abstract
Background Carbamazepine is a drug used in the treatment of neurological disorders such as epilepsy. However, due to its erratic absorption, oral bioavailability is often poor. There is, therefore, the need to develop alternative formulations for carbamazepine with better pharmacokinetic characteristics. Aim The aim of this study was to formulate an oral modified-release multiparticulate matrix of carbamazepine from cocoa pod husk (CPH) pectin and evaluate the pharmacokinetic profile of this formulation using in vitro and in vivo models. Methods CPH pectin was extracted from cocoa pod husks with hot aqueous and citric acid solutions. Oral multiparticulate carbamazepine matrices were formulated from CPH pectin cross-linked with calcium. The formulation was evaluated for carbamazepine content and release profile in vitro. For in vivo pharmacokinetic profile estimation, rats were put into 4 groups of 5 animals each to receive carbamazepine multiparticulate matrix formulations A and B, carbamazepine powder, and Tegretol CR®. Animals in each group received 200 mg/kg of each drug via the oral route. Maximum plasma concentration (Cmax), area under the concentration-time curve (AUC), elimination rate constant (Ke), and terminal half-life (t1/2) of the formulations were estimated by noncompartmental analysis. Results The pectin extraction from fresh cocoa pod husks using hot aqueous and citric acid solutions gave pectin yields of 9.63% and 11.54%, respectively. The drug content of carbamazepine in CPH pectin formulations A and B was 95% and 96%, respectively. There was controlled and sustained release of carbamazepine for both formulations A and B in vitro. AUC0⟶36 (176.20 ± 7.97 µg.h/mL), Cmax (8.45 ± 0.71 μg/mL), Tmax (12 ± 1.28 h), and t1/2 (13.75 ± 3.28 h) of formulation A showed a moderately enhanced and comparable pharmacokinetic profile to Tegretol CR® (AUC0⟶36: 155 ± 7.15 µg.h/mL, Cmax: 8.24 ± 0.45 μg/mL, Tmax: 8.0 ± 2.23 h, and t1/2: 13.51 ± 2.87 h). Conclusion Findings from the study suggest that formulations of CPH pectin had the potential to control and maintain therapeutic concentrations of carbamazepine in circulation over a period of time in the rat model.
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Assessment of Mini-Tablets Coating Uniformity as a Function of Fluid Bed Coater Inlet Conditions. Pharmaceutics 2021; 13:pharmaceutics13050746. [PMID: 34070006 PMCID: PMC8157842 DOI: 10.3390/pharmaceutics13050746] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 05/10/2021] [Accepted: 05/13/2021] [Indexed: 11/17/2022] Open
Abstract
This study concerned the quality of mini-tablets’ coating uniformity obtained by either the bottom spray chamber with a classical Wurster distributor (CW) or a swirl distributor (SW). Mini-tablets with a diameter of 2.0, 2.5, and 3.0 mm were coated with hypromellose using two different inlet air distributors as well as inlet airflow rates (130 and 156 m3/h). Tartrazine was used as a colorant in the coating layer and the coating uniformity was assessed by spectrophotometric analysis of solutions obtained after disintegration of the mini-tablets (n = 100). Higher uniformity of coating material distribution among the mini-tablets was observed in the case of SW distributor, even for the biggest mini-tablets (d = 3.0 mm), with an RSD no larger than 5.0%. Additionally, coating thickness was evaluated by colorimetric analysis (n = 1000), using a scanner method, and expressed as a hue value. A high correlation (R = 0.993) between inter-tablet variability of hue and UV-Vis results was obtained. Mini-tablets were successfully coated in a fluid bed system using both a classical Wurster distributor as well as a swirl generator. However, regardless of the mini-tablets’ diameter, better film uniformity was achieved in the case of a distributor with a swirl generator.
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Huang GY, Cui H, Lu XY, Zhang LD, Ding XY, Wu JJ, Duan LX, Zhang SJ, Liu Z, Zhang RR. (+/-)-Dievodialetins A-G: Seven pairs of enantiomeric coumarin dimers with anti-acetylcholinesterase activity from the roots of Evodia lepta Merr. PHYTOCHEMISTRY 2021; 182:112597. [PMID: 33341030 DOI: 10.1016/j.phytochem.2020.112597] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
Seven pairs of undescribed enantiomeric bis-coumarins, (±)-dievodialetins A-G, were separated from the roots of Evodia lepta Merr. Two coumarin nuclei were linked via a 1,4-dimethyl4-vinylcyclohexene moiety in (±)-dievodialetins C-G. The structures of the undescribed compounds, including their absolute configurations were elucidated by spectroscopic analyses, X-ray diffraction, and computational calculations. In the biosynthetic pathways, these bis-coumarins were presumably derived from the precursors demethylsuberosin and 3-(3-methylbut-2-enyl)umbelliferone via a [4 + 2] Diels-Alder reaction. Besides, all compounds exhibited neuroprotective effects by inhibiting acetylcholinesterase (AChE) activity with IC50 values ranging from 7.3 to 12.1 nM and they also suppressed oxidative stress (MDA and SOD) and neuroinflammation (IL-1β and IL-6).
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Affiliation(s)
- Guo-Yong Huang
- Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China
| | - Hui Cui
- Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China
| | - Xin-Yi Lu
- Department of Neurology, Biological Resource Center, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510000, People's Republic of China; Department of Neurology, Biological Resource Center, Guangdong Provincial Hospital of Chinese Medicine, 510000, People's Republic of China
| | - Lu-Di Zhang
- Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China
| | - Xiao-Ying Ding
- Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China
| | - Jin-Jun Wu
- Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China
| | - Li-Xin Duan
- Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China
| | - Shi-Jie Zhang
- Department of Neurology, Biological Resource Center, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510000, People's Republic of China; Department of Neurology, Biological Resource Center, Guangdong Provincial Hospital of Chinese Medicine, 510000, People's Republic of China.
| | - Zhongqiu Liu
- Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China.
| | - Rong-Rong Zhang
- Joint Laboratory for Translational Cancer Research of Chinese Medicine of the Ministry of Education of the People's Republic of China, International Institute for Translational Chinese Medicine, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China.
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Kotlowska H, Krotka J, Szymanska M, Kubiak B, Sznitowska M, Nalluri BN. The use of novel tools for the assessment of powders and granules flow properties and for the analysis of minitablets compression process. Drug Dev Ind Pharm 2020; 46:547-556. [DOI: 10.1080/03639045.2020.1734020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Hanna Kotlowska
- Department of Pharmaceutical Technology, Medical University of Gdansk, Gdansk, Poland
| | - Joanna Krotka
- Department of Pharmaceutical Technology, Student Chapter of ISPE, Gdansk, Poland
| | - Marta Szymanska
- Department of Pharmaceutical Technology, Student Chapter of ISPE, Gdansk, Poland
| | | | - Malgorzata Sznitowska
- Department of Pharmaceutical Technology, Medical University of Gdansk, Gdansk, Poland
| | - Buchi N. Nalluri
- Department of Pharmaceutics, KVSR Siddhartha College of Pharmaceutical Sciences, Vijayawada, India
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