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Gao Y, Nai J, Yang Z, Zhang J, Ma S, Zhao Y, Li H, Li J, Yang Y, Yang M, Wang Y, Gong W, Yu F, Gao C, Li Z, Mei X. A novel preparative method for nanoparticle albumin-bound paclitaxel with high drug loading and its evaluation both in vitro and in vivo. PLoS One 2021; 16:e0250670. [PMID: 33909691 DOI: 10.1371/journal.pone.0250670] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 04/08/2021] [Indexed: 12/29/2022] Open
Abstract
We developed a novel preparative method for nanoparticle albumin-bound (nab) paclitaxel with high drug loading, which was based on improved paclitaxel solubility in polyethylene glycol (PEG) and self-assembly of paclitaxel in PEG with albumin powders into nanoparticles. That is, paclitaxel and PEG were firstly dissolved in ethanol, which was subsequently evaporated under vacuum. The obtained liquid was then mixed with human serum albumin powders. Thereafter, the mixtures were added into phosphate-buffered saline and nab paclitaxel suspensions emerged after ultrasound. Nab paclitaxel was finally acquired after dialysis and freeze drying. The drug loading of about 15% (W/V) were realized in self-made nab paclitaxel, which was increased by approximately 50% compared to 10% (W/V) in Abraxane. Now this new preparative method has been authorized to obtain patent from China and Japan. The similar characteristics of self-made nab paclitaxel compared to Abraxane were observed in morphology, encapsulation efficiency, in vitro release, X-ray diffraction analysis, differential scanning calorimetry analysis, and circular dichroism spectra analysis. Consistent concentration-time curves in rats, biodistributions in mice, anti-tumor activities in mice, and histological transmutation in mice were also found between Abraxane and self-made nanoparticles. In a word, our novel preparative method for nab paclitaxel can significantly improve drug loading, obviously decrease product cost, and is considered to have potent practical value.
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Tremblay M, Barrus MM, Cocker PJ, Baunez C, Winstanley CA. Increased motor impulsivity in a rat gambling task during chronic ropinirole treatment: potentiation by win-paired audiovisual cues. Psychopharmacology (Berl) 2019; 236:1901-1915. [PMID: 30706098 DOI: 10.1007/s00213-019-5173-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 01/16/2019] [Indexed: 02/04/2023]
Abstract
RATIONALE Chronic administration of D2/3 receptor agonists ropinirole or pramipexole can increase the choice of uncertain rewards in rats, theoretically approximating iatrogenic gambling disorder (iGD). OBJECTIVES We aimed to assess the effect of chronic ropinirole in animal models that attempt to capture critical aspects of commercial gambling, including the risk of losing rather than failing to gain, and the use of win-paired sensory stimuli heavily featured in electronic gambling machines (EGMs). METHODS Male Long-Evans rats learned the rat gambling task (rGT; n = 24), in which animals sample between four options that differ in the magnitude and probability of rewards and time-out punishments. In the cued rGT (n = 40), reward-concurrent audiovisual cues were added that scaled in complexity with win size. Rats were then implanted with an osmotic pump delivering ropinirole (5 mg/kg/day) or saline for 28 days. RESULTS Chronic ropinirole did not unequivocally increase preference for more uncertain outcomes in either the cued or uncued rGT. Ropinirole transiently increased premature responses, a measure of motor impulsivity, and this change was larger and more long-lasting in the cued task. CONCLUSIONS These data suggest that explicitly signaling loss prevents the increase in preference for uncertain rewards caused by D2/3 receptor agonists observed previously. The ability of win-paired cues to amplify ropinirole-induced increases in motor impulsivity may explain why compulsive use of EGMs is particularly common in iGD. These data offer valuable insight into the cognitive-behavioral mechanisms through which chronic dopamine agonist treatments may induce iGD and related impulse control disorders.
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Affiliation(s)
- Melanie Tremblay
- Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2215 Westbrook Mall, Vancouver, BC, V6T 1Z3, Canada. .,Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada.
| | - Michael M Barrus
- Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2215 Westbrook Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Paul J Cocker
- Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2215 Westbrook Mall, Vancouver, BC, V6T 1Z3, Canada.,Department of Experimental Psychology, University of Cambridge, Cambridge, UK
| | - Christelle Baunez
- Institut de Neurosciences de la Timone (INT), UMR7289, Centre National de la Recherche Scientifique (CNRS) ∓ Aix-Marseille Université (AMU), Marseille, France
| | - Catharine A Winstanley
- Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2215 Westbrook Mall, Vancouver, BC, V6T 1Z3, Canada.
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Li Y, Pan H, Duan H, Chen J, Zhu Z, Fan J, Li P, Yang X, Pan W. Double-layered osmotic pump controlled release tablets of actarit: In vitro and in vivo evaluation. Asian J Pharm Sci 2018; 14:340-348. [PMID: 32104464 PMCID: PMC7032193 DOI: 10.1016/j.ajps.2018.05.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 04/17/2018] [Accepted: 05/17/2018] [Indexed: 12/29/2022] Open
Abstract
The aim of the study was to develop actarit double-layered osmotic pump tablets to overcome the weak points of actarit common tablets, such as short half-life and large plasma concentration fluctuations. Single factor experiment and orthogonal test were applied to optimize the formulation; the pharmacokinetic study was performed in beagle dogs adopting actarit common tablets as reference tablets. The optimal formulation was as follows: drug layer: 150 mg actarit, 240 mg PEO-N80, 50 mg NaCl; push layer: 140 mg PEO-WSR303, 20 mg NaCl; coating solution: 30 g cellulose acetate and 6 g PEG 4000 in 1000 ml 94% acetone solution, 60 mg coating weight gain. The pharmacokinetic study showed that Tmax was prolonged by the contrast of commercial common tablets with constant drug release rate, but the bioavailability was equivalent. And a good in vivo–in vitro correlation of the actarit osmotic pump tablets was also established. The designed actarit osmotic pump tablets can be applied for rheumatoid arthritis, proposing a promising replacement for the marked common products.
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Affiliation(s)
- Yuenan Li
- Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang City, Liaoning Province 110016, China
| | - Hao Pan
- Liao Ning University, No. 66, Chongshan Middle Road, Huanggu District, Shenyang City, Liaoning Province 110036, China
| | - Hongliang Duan
- Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang City, Liaoning Province 110016, China
| | - Jianting Chen
- Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang City, Liaoning Province 110016, China
| | - Zhihong Zhu
- Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang City, Liaoning Province 110016, China
| | - Jingxin Fan
- Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang City, Liaoning Province 110016, China
| | - Pingfei Li
- Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang City, Liaoning Province 110016, China
| | - Xinggang Yang
- Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang City, Liaoning Province 110016, China
| | - Weisan Pan
- Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang City, Liaoning Province 110016, China
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Zhao S, Yu F, Liu N, Di Z, Yan K, Liu Y, Li Y, Zhang H, Yang Y, Yang Z, Li Z, Mei X. Synchronous delivery of felodipine and metoprolol tartrate using monolithic osmotic pump technology. Drug Dev Ind Pharm 2016; 42:1723-31. [PMID: 27074758 DOI: 10.3109/03639045.2016.1171332] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The synchronous sustained-release of two drugs was desired urgently for patients needing combination therapy in long term. However, sophisticated technologies were used generally to realize the simultaneous delivery of two drugs especially those with different physico-chemical properties. The purpose of this study was to obtain the concurrent release of felodipine and metoprolol tartrate, two drugs with completely different solubilities, in a simple monolithic osmotic pump system (FMOP). Two types of blocking agents were used in monolithic osmotic pump tablets and the synchronous sustained-release of FMOP was acquired in vitro. The tablets were also administered to beagle dogs and the plasma levels of FMOP were determined by HPLC-MS/MS. The pharmacokinetic parameters were calculated using a non-compartmental model. Cmax of both felodipine and metoprolol from the osmotic pump tablets were lower, tmax and mean residence time of both felodipine and metoprolol from the osmotic pump tablets were longer significantly than those from immediate release tablets. These results verified prolonged release of felodipine and metoprolol tartrate from osmotic pump formulations. The similar absorption rate between felodipine and metoprolol in beagles was also obtained by this osmotic pump formulation. Therefore, it could be supposed that the accordant release of two drugs with completely different solubilities may be realized just by using monolithic osmotic pump technology.
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Affiliation(s)
- Shiqing Zhao
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Fanglin Yu
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Nan Liu
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Zhong Di
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Kun Yan
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Yan Liu
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Ying Li
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Hui Zhang
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Yang Yang
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Zhenbo Yang
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Zhiping Li
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
| | - Xingguo Mei
- a Beijing Institute of Pharmacology and Toxicology , Beijing , People's Republic of China
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