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Li YW, Zhang HM, Cui BJ, Hao CY, Zhu HY, Guan J, Wang D, Jin Y, Feng B, Cai JH, Qi XR, Shi NQ. "Felodipine-indomethacin" co-amorphous supersaturating drug delivery systems: "Spring-parachute" process, stability, in vivo bioavailability, and underlying molecular mechanisms. Eur J Pharm Biopharm 2021; 166:111-125. [PMID: 34119671 DOI: 10.1016/j.ejpb.2021.05.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 04/09/2021] [Accepted: 05/03/2021] [Indexed: 11/26/2022]
Abstract
Amorphous solid dispersions (ASD) are one of most commonly used supersaturating drug delivery systems (SDDS) to formulate insoluble active pharmaceutical ingredients. However, the development of polymer-guided stabilization of ASD systems faces many obstacles. To overcome these shortcomings, co-amorphous supersaturable formulations have emerged as an alternative formulation strategy for poorly soluble compounds. Noteworthily, current researches around co-amorphous system (CAS) are mostly focused on preparation and characterization of these systems, but more detailed investigations of their supersaturation ("spring-parachute" process), stability, in vivo bioavailability and molecular mechanisms are inadequate and need to be clarified. In present study, we chose pharmacological relevant BCS II drugs to fabricate and characterize "felodipine-indomethacin" CAS. To enrich the current inadequate but key knowledge on CAS studies, we carried out following highlighted investigations including dissolution/solubility, semi-continuous "spring-parachute" process, long-term stability profile of amorphous state, in vivo bioavailability and underlying molecular mechanisms (molecular interaction, molecular miscibility and crystallization inhibition). Generally, the research provides some key information in the field of current "drug-drug" CAS supersaturable formulations.
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Affiliation(s)
- Ya-Wei Li
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China
| | - Hong-Mei Zhang
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China
| | - Bai-Ji Cui
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China
| | - Cheng-Yi Hao
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China
| | - He-Yun Zhu
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China
| | - Jiao Guan
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China
| | - Dan Wang
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China
| | - Ying Jin
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China
| | - Bo Feng
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China
| | - Jian-Hui Cai
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China
| | - Xian-Rong Qi
- School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Nian-Qiu Shi
- School of Pharmacy, Jilin Medical University, Jilin City 132013, Jilin Province, China.
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Feng XM, Zheng WY, Zhang HM, Shi WY, Li Y, Cui BJ, Wang HY. Vaccination with Bivalent DNA Vaccine of α1-Giardin and CWP2 Delivered by Attenuated Salmonella typhimurium Reduces Trophozoites and Cysts in the Feces of Mice Infected with Giardia lamblia. PLoS One 2016; 11:e0157872. [PMID: 27332547 PMCID: PMC4917239 DOI: 10.1371/journal.pone.0157872] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 06/06/2016] [Indexed: 12/04/2022] Open
Abstract
Background Giardia lamblia is one of the most common infectious protozoans in human that may cause diarrhea in travelers. Searching for antigens that induced effectively protective immunity has become a key point in the development of vaccine against giardiasis. Methodology/Principal Findings Mice vaccinated with G. lamblia trophozozite-specific α1-giardin DNA vaccine delivered orally by attenuated Salmonella typhimurium SL7027 elicited 74.2% trophozoite reduction, but only 28% reduction in cyst shedding compared with PBS buffer control. Oral vaccination with Salmonella-delivered cyst-specific CWP2 DNA produced 89% reduction in cysts shedding in feces of vaccinated mice. Significantly, the mice vaccinated with Salmonella-delivered bivalent α1-giardin and CWP2 DNA vaccines produced significant reduction in both trophozoite (79%) and cyst (93%) in feces of vaccinated mice. This parasite reduction is associated with the strong local mucosal IgA secretion and the IgG2a-dominant systemic immune responses in vaccinated mice. Conclusions The results demonstrate that bivalent vaccines targeting α1-giardin and CWP2 can protect mice against the colonization of Giardia trophozoite and block the transformation of cyst in host at the same time, and can be used to prevent Giardia infection and block the transmission of giardiasis.
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Affiliation(s)
- Xian-Min Feng
- The Department of Pathogenic Biology, Jilin Medical University, Jilin City, China
- * E-mail:
| | - Wen-Yu Zheng
- The Center Hospital of Jilin City, Jilin City, China
| | - Hong-Mei Zhang
- The Department of Pathogenic Biology, Jilin Medical University, Jilin City, China
| | - Wen-Yan Shi
- The Department of Pathogenic Biology, Jilin Medical University, Jilin City, China
| | - Yao Li
- The Department of Pathogenic Biology, Jilin Medical University, Jilin City, China
| | - Bai-Ji Cui
- The Department of Pathogenic Biology, Jilin Medical University, Jilin City, China
| | - Hui-Yan Wang
- The Department of Pathogenic Biology, Jilin Medical University, Jilin City, China
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