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Wang C, Ji L, Wang J, Zhang J, Qiu L, Chen S, Ni X. Amifostine loaded lipid-calcium carbonate nanoparticles as an oral drug delivery system for radiation protection. Biomed Pharmacother 2024; 177:117029. [PMID: 38991305 DOI: 10.1016/j.biopha.2024.117029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 06/19/2024] [Accepted: 06/21/2024] [Indexed: 07/13/2024] Open
Abstract
Amifostine (AMF) as the first-line radiation protection drug, usually suffered from low compliance and short half-life upon clinical applications. The development of oral drug delivery system (DDS) for AMF is a promising solution. However, the inherent shortages of AMF present significant challenges in the design of suitable oral DDS. Here in this study, we utilized the ability of calcium ions to bind with AMF and prepared AMF loaded calcium carbonate (CC) core, CC/AMF, using phase transferred coprecipitation method. We further modified the CC/AMF using phospholipids to prepare AMF loaded lipid-calcium carbonate (LCC) hybrid nanoparticles (LCC/AMF) via a thin-film dispersion method. LCC/AMF combines the oral advantages of lipid nanoparticles with the drug-loading capabilities of CC, which was shown as uniform nano-sized formulation with decent stability in aqueous solution. With favorable intestinal transport and absorption effects, it effectively enhances the in vivo radiation protection efficacy of AMF through oral administration. More importantly, we further investigated the cellular accumulation profile and intracellular transport mechanism of LCC/AMF using MDCK and Caco-2 cell lines as models. This research not only alters the current administration method of AMF to enhance its convenience and compliance, but also provides insights and guidance for the development of more suitable oral DDS for AMF in the future.
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Affiliation(s)
- Cheng Wang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China
| | - Lihua Ji
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China
| | - Jianhao Wang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China
| | - Jiaxing Zhang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China
| | - Lin Qiu
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China.
| | - Shaoqing Chen
- The Affiliated Changzhou No.2 People's Hospital, Nanjing Medical University, Changzhou, Jiangsu, China; Jiangsu Province Engineering Research Center of Medical Physics, Changzhou, Jiangsu 213003, China.
| | - Xinye Ni
- The Affiliated Changzhou No.2 People's Hospital, Nanjing Medical University, Changzhou, Jiangsu, China; Jiangsu Province Engineering Research Center of Medical Physics, Changzhou, Jiangsu 213003, China.
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Han R, He H, Lu Y, Lu H, Shen S, Wu W. Oral targeted drug delivery to post-gastrointestinal sites. J Control Release 2024; 370:256-276. [PMID: 38679163 DOI: 10.1016/j.jconrel.2024.04.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/21/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
As an essential branch of targeted drug delivery, oral targeted delivery is attracting growing attention in recent years. In addition to site-specific delivery for the treatment of locoregional diseases in the gastrointestinal tract (GIT), oral targeted delivery to remote sites beyond the GIT emerges as a cutting-edge research topic. This review aims to provide an overview of the fundamental concepts and most recent advances in this field. Owing to the physiological barriers existing in the GIT, carrier systems should be transported across the enteric epithelia to target remote sites. Recently, pioneer investigations have validated the transport of intact micro- or nanocarriers across gastrointestinal barriers and subsequently to various distal organs and tissues. The microfold (M) cell pathway is the leading mechanism underlying the oral absorption of particulates, but the contribution of the transcellular and paracellular pathways should not be neglected either. In addition to well-acknowledged physicochemical and biological factors, the formation of a protein corona may also influence the biological fate of carrier systems. Although in an early stage of conceptualization, oral targeted delivery to remote diseases has demonstrated promising potential for the treatment of inflammation, tumors, and diseases inflicting the lymphatic and mononuclear phagocytosis systems.
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Affiliation(s)
- Rongze Han
- Key Laboratory of Smart Drug Delivery of MOE, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Haisheng He
- Key Laboratory of Smart Drug Delivery of MOE, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Yi Lu
- Key Laboratory of Smart Drug Delivery of MOE, School of Pharmacy, Fudan University, Shanghai 201203, China; Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai 200443, China; Fudan Zhangjiang Institute, Shanghai 201203, China
| | - Huiping Lu
- Pharmacy Department and Center for Medical Research and Innovation, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai 201399, China
| | - Shun Shen
- Pharmacy Department and Center for Medical Research and Innovation, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai 201399, China.
| | - Wei Wu
- Key Laboratory of Smart Drug Delivery of MOE, School of Pharmacy, Fudan University, Shanghai 201203, China; Pharmacy Department and Center for Medical Research and Innovation, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai 201399, China; Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai 200443, China; Fudan Zhangjiang Institute, Shanghai 201203, China.
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The effect of efflux pump inhibitors on in vitro and in vivo efficacy of solid lipid nanoparticles containing SN38. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101969] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Effect of fatty acid ester structure on cytotoxicity of self-emulsified nanoemulsion and transport of nanoemulsion droplets. Colloids Surf B Biointerfaces 2020; 194:111220. [DOI: 10.1016/j.colsurfb.2020.111220] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 06/09/2020] [Accepted: 06/23/2020] [Indexed: 11/22/2022]
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Ye JY, Chen ZY, Huang CL, Huang B, Zheng YR, Zhang YF, Lu BY, He L, Liu CS, Long XY. A Non-Lipolysis Nanoemulsion Improved Oral Bioavailability by Reducing the First-Pass Metabolism of Raloxifene, and Related Absorption Mechanisms Being Studied. Int J Nanomedicine 2020; 15:6503-6518. [PMID: 32922013 PMCID: PMC7457831 DOI: 10.2147/ijn.s259993] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 08/03/2020] [Indexed: 12/19/2022] Open
Abstract
Objective A non-lipolysis nanoemulsion (NNE) was designed to reduce the first-pass metabolism of raloxifene (RAL) by intestinal UDP-glucuronosyltransferases (UGTs) for increasing the oral absorption of RAL, coupled with in vitro and in vivo studies. Methods In vitro stability of NNE was evaluated by lipolysis and the UGT metabolism system. The oral bioavailability of NNE was studied in rats and pigs. Finally, the absorption mechanisms of NNE were investigated by in situ single-pass intestinal perfusion (SPIP) in rats, Madin-Darby canine kidney (MDCK) cells model, and lymphatic blocking model. Results The pre-NNE consisted of isopropyl palmitate, linoleic acid, Cremophor RH40, and ethanol in a weight ratio of 3.33:1.67:3:2. Compared to lipolysis nanoemulsion of RAL (RAL-LNE), the RAL-NNE was more stable in in vitro gastrointestinal buffers, lipolysis, and UGT metabolism system (p < 0.05). The oral bioavailability was significantly improved by the NNE (203.30%) and the LNE (205.89%) relative to the suspension group in rats. However, 541.28% relative bioavailability was achieved in pigs after oral NNE intake compared to the suspension and had two-fold greater bioavailability than the LNE (p < 0.05). The RAL-NNE was mainly absorbed in the jejunum and had high permeability at the intestine of rats. The results of both SPIP and MDCK cell models demonstrated that the RAL-NNE was absorbed via endocytosis mediated by caveolin and clathrin. The other absorption route, the lymphatic transport (cycloheximide as blocking agent), was significantly improved by the NNE compared with the LNE (p < 0.05). Conclusion A NNE was successfully developed to reduce the first-pass metabolism of RAL in the intestine and enhance its lymphatic transport, thereby improving the oral bioavailability. Altogether, NNE is a promising carrier for the oral delivery of drugs with significant first-pass metabolism.
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Affiliation(s)
- Jing-Yi Ye
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Zhong-Yun Chen
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Chuan-Li Huang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Bei Huang
- School of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Yu-Rong Zheng
- School of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Ying-Feng Zhang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Ban-Yi Lu
- School of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Lin He
- School of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Chang-Shun Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, People's Republic of China
| | - Xiao-Ying Long
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China.,Guangdong Engineering & Technology Research Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
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Bunchongprasert K, Shao J. Impact of Media in Transport Study on Cell Monolayer Integrity and Permeability. J Pharm Sci 2020; 109:1145-1152. [DOI: 10.1016/j.xphs.2019.11.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 10/25/2019] [Accepted: 11/12/2019] [Indexed: 02/07/2023]
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Tong Y, Zhang Q, Shi W, Wang J. Mechanisms of oral absorption improvement for insoluble drugs by the combination of phospholipid complex and SNEDDS. Drug Deliv 2019; 26:1155-1166. [PMID: 31736393 PMCID: PMC6882455 DOI: 10.1080/10717544.2019.1686086] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 10/22/2019] [Accepted: 10/24/2019] [Indexed: 12/21/2022] Open
Abstract
In the present study, a water insoluble drug named silybin was encapsulated into self-nanoemulsifying drug delivery system (SNEDDS) following the preparation of silybin-phospholipid complex (SB-PC), then several methods were carried out to characterize SB-PC-SNEDDS and elucidate its mechanisms to improve the oral absorption of SB. Using a dynamic in vitro digestion model, the lipolysis of SB-PC-SNEDDS was proved to be mainly related with the property of its lipid excipients. SB-PC-SNEDDS could significantly enhance the transport of SB across Caco-2 cells, which may partly attribute to the increased cell membrane fluidity and the loss of tight junction according to the analysis results of fluorescence anisotropy of 1,6-diphenyl-1,3,5-hexatriene (DPH) and tight junction protein (ZO-1). The result of in situ perfusion showed the intestinal absorption of SB from high to low was SB-PC-SNEDDS, SB-PC, and SB. The extent of lymphatic transport of SB-PC and SB-PC-SNEDDS via the mesenteric duct was 12.2 and 22.7 folds of that of SB, respectively. In the lymph duct cannulated rats, the relative bioavailability (Fr) of SB-PC and SB-PC-SEDDS compared to SB was 1265.9% and 1802.5%, respectively. All the above results provided mechanistic support for oral absorption improvement of water insoluble drugs by the combination of PC and SNEDDS.
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Affiliation(s)
- Yingpeng Tong
- School of Advanced Study, Institute of Natural Medicine and Health Product, Taizhou University, Taizhou, China
- Department of Pharmaceutics, School of Pharmacy, Ministry of Education, Fudan University & Key Laboratory of Smart Drug Delivery, Shanghai, China
| | - Qin Zhang
- Department of Pharmaceutics, School of Pharmacy, Ministry of Education, Fudan University & Key Laboratory of Smart Drug Delivery, Shanghai, China
| | - Wen Shi
- Department of Pharmaceutics, School of Pharmacy, Ministry of Education, Fudan University & Key Laboratory of Smart Drug Delivery, Shanghai, China
| | - Jianxin Wang
- School of Advanced Study, Institute of Natural Medicine and Health Product, Taizhou University, Taizhou, China
- Department of Pharmaceutics, School of Pharmacy, Ministry of Education, Fudan University & Key Laboratory of Smart Drug Delivery, Shanghai, China
- Institute of Integrative Medicine, Fudan University, Shanghai, China
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Ye J, Wu H, Huang C, Lin W, Zhang C, Huang B, Lu B, Xu H, Li X, Long X. Comparisons of in vitro Fick's first law, lipolysis, and in vivo rat models for oral absorption on BCS II drugs in SNEDDS. Int J Nanomedicine 2019; 14:5623-5636. [PMID: 31440045 PMCID: PMC6664859 DOI: 10.2147/ijn.s203911] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 06/17/2019] [Indexed: 01/01/2023] Open
Abstract
Purpose The objective of this study was to compare the in vitro Fick’s first law, in vitro lipolysis, and in vivo rat assays for oral absorption of Biopharmaceutical Classification Systems Class II (BCS II) drugs in self-nanoemulsifying drug delivery system (SNEDDS), and studied drugs and oils properties effects on the absorption. Methods The transport abilities of griseofulvin (GRI), phenytoin (PHE), indomethacin (IND), and ketoprofen (KET) in saturated water solutions and SNEDDS were investigated using the in vitro Madin-Darby canine kidney cell model. GRI and cinnarizine (CIN) in medium-chain triglycerides (MCT)-SNEDDS and long-chain triglycerides (LCT)-SNEDDS were administered in the in vivo SD rat and in vitro lipolysis models to compare the oral absorption and the distribution behaviors in GIT and build an in vitro-in vivo correlation (IVIVC). Results In the cell model, the solubility of GRI, PHE, IND, and KET increased 6–8 fold by SNEDDS, but their permeability were only 18%, 4%, 8%, and 33% of those of their saturated water solutions, respectively. However, in vivo absorption of GRI-SNEDDS was twice that of the GRI suspension and those of CIN-SNEDDS were 15–21 fold those of the CIN suspension. In the lipolysis model, the GRI% in aqueous and pellet phases of MCT were similar to that in LCT. In contrast, the CIN% in the aqueous and pellet phases were decreased but that of the lipid phase increased. In addition, an IVIVC was found between the CIN% in the lipid phase and in vivo relative oral bioavailability (Fr). Conclusion The in vitro cell model was still a suitable tool to study drug properties effects on biofilm transport and SNEDDS absorption mechanisms. The in vitro lipolysis model provided superior oral absorption simulation of SNEDDS and helped to build correlation with in vivo rats. The oral drug absorption was affected by drug and oil properties in SNEDDS.
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Affiliation(s)
- Jingyi Ye
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Huiyi Wu
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Chuanli Huang
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Wanting Lin
- Department of Pharmacy of Chinese Materia Medica, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Caifeng Zhang
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Bei Huang
- Department of Pharmacy of Chinese Materia Medica, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Banyi Lu
- Department of Pharmacy of Chinese Materia Medica, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Hongyu Xu
- Department of Pharmacy of Chinese Materia Medica, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
| | - Xiaoling Li
- Department of Pharmaceutics and Medicinal Chemistry, Thomas J. Long School of Pharmacy & Health Sciences, University of the Pacific, Stockton, CA 95211, USA
| | - Xiaoying Long
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China.,Department of Oral Delivery, Guangdong Engineering and Technology Research Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou 510006, People's Republic of China
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Bunchongprasert K, Shao J. Cytotoxicity and permeability enhancement of Capmul®MCM in nanoemulsion formulation. Int J Pharm 2019; 561:289-295. [DOI: 10.1016/j.ijpharm.2019.03.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 11/27/2022]
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Xiong S, Liu W, Li D, Chen X, Liu F, Yuan D, Pan H, Wang Q, Fang S, Chen T. Oral Delivery of Puerarin Nanocrystals To Improve Brain Accumulation and Anti-Parkinsonian Efficacy. Mol Pharm 2019; 16:1444-1455. [PMID: 30811206 DOI: 10.1021/acs.molpharmaceut.8b01012] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Puerarin (PU) has emerged as a promising herb-derived anti-Parkinsonism compound. However, the undesirable water solubility as well as the unwanted bioavailability of PU limit its application. Therefore, this study aimed to develop and characterize PU nanocrystals (PU-NCs) with enhanced oral bioavailability and improved brain accumulation for the treatment of Parkinson's disease (PD). The fabricated PU-NCs were approximately spherical, with a mean size of 83.05 ± 1.96 nm, a PDI of 0.047 ± 0.009, a drug loading of 72.7%, and a rapid dissolution rate in vitro. Molecular dynamics simulation of PU and Pluronic F68 demonstrated the interaction energy and binding energy of -88.1 kJ/mol and -40.201 ± 0.685 kJ/mol, respectively, indicating a spontaneous binding with van der Waals interactions. In addition, the cellular uptake and permeability of PU-NCs were significantly enhanced as compared to PU alone ( p < 0.01). Moreover, PU-NCs exerted a significant neuroprotective effect against the cellular damage induced by the 1-methyl-4-phenylpyridinium ion (MPP+). Besides, PU-NCs demonstrated no obvious toxic effects on zebrafish, as evidenced by the unaltered morphology, hatching, survival rate, body length, and heart rate. Fluorescence resonance energy transfer (FRET) imaging revealed that intact nanocrystals were found in the intestine and brain of adult zebrafish gavaged with DiO/DiI/PU-NCs. Increased values of Cmax and AUC0- t were observed in the plasma of rats following oral administration of PU-NCs compared to PU suspension. Likewise, brain accumulation of PU-NCs was higher than that of PU suspension. Furthermore, PU-NCs attenuated dopamine depletion, ameliorated 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced behavioral deficits, and enhanced the levels of dopamine and its metabolites. Taken altogether, this study provides evidence that PU-NCs could be exploited as a potential oral delivery system to treat PD, by improving the poor bioavailability of PU and enhancing their delivery into the brain.
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Affiliation(s)
- Sha Xiong
- Institute of Clinical Pharmacology , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Wei Liu
- Institute of Clinical Pharmacology , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Dongli Li
- Institute of Clinical Pharmacology , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Xiaojia Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences , University of Macau , Macau , China
| | - Fang Liu
- Institute of Tropical Medicine , Guangzhou University of Chinese Medicine , Guangzhou 501405 , China
| | - Dongsheng Yuan
- Institute of Clinical Pharmacology , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Huafeng Pan
- Institute of Clinical Pharmacology , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Qi Wang
- Institute of Clinical Pharmacology , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Shuhuan Fang
- Institute of Clinical Pharmacology , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Tongkai Chen
- Institute of Clinical Pharmacology , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
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Basic principles of drug delivery systems - the case of paclitaxel. Adv Colloid Interface Sci 2019; 263:95-130. [PMID: 30530177 DOI: 10.1016/j.cis.2018.11.004] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 11/15/2018] [Accepted: 11/15/2018] [Indexed: 01/15/2023]
Abstract
Cancer is the second cause of death worldwide, exceeded only by cardiovascular diseases. The prevalent treatment currently used against metastatic cancer is chemotherapy. Among the most studied drugs that inhibit neoplastic cells from acquiring unlimited replicative ability (a hallmark of cancer) are the taxanes. They operate via a unique molecular mechanism affecting mitosis. In this review, we show this mechanism for one of them, paclitaxel, and for other (non-taxanes) anti-mitotic drugs. However, the use of paclitaxel is seriously limited (its bioavailability is <10%) due to several long-standing challenges: its poor water solubility (0.3 μg/mL), its being a substrate for the efflux multidrug transporter P-gp, and, in the case of oral delivery, its first-pass metabolism by certain enzymes. Adequate delivery methods are therefore required to enhance the anti-tumor activity of paclitaxel. Thus, we have also reviewed drug delivery strategies in light of the various physical, chemical, and enzymatic obstacles facing the (especially oral) delivery of drugs in general and paclitaxel in particular. Among the powerful and versatile platforms that have been developed and achieved unprecedented opportunities as drug carriers, microemulsions might have great potential for this aim. This is due to properties such as thermodynamic stability (leading to long shelf-life), increased drug solubilization, and ease of preparation and administration. In this review, we define microemulsions and nanoemulsions, analyze their pertinent properties, and review the results of several drug delivery carriers based on these systems.
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Khatri P, Shao J. Mechanism and Structural Factors of Lipid and Surfactant in the Formation of Self-Emulsified Nanoemulsion. J Pharm Sci 2018; 107:2198-2207. [DOI: 10.1016/j.xphs.2018.03.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 03/14/2018] [Accepted: 03/27/2018] [Indexed: 01/07/2023]
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Khatri P, Shao J. Impact of digestion on the transport of dextran-loaded self-emulsified nanoemulsion through MDCK epithelial cell monolayer and rat intestines. Int J Pharm 2017; 536:353-359. [PMID: 29217473 DOI: 10.1016/j.ijpharm.2017.12.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 11/15/2017] [Accepted: 12/03/2017] [Indexed: 01/03/2023]
Abstract
Many of the lipids and surfactants used to prepare the self-emulsified nanoemulsion (SEN) are subjected to the gastro-intestinal enzymatic digestion, which may affect the absorption of the loaded drug. The present study was to investigate the impact of such digestion on the transport of hydrophilic macromolecules (10-kDa dextran as the model compound) loaded in SEN through the MDCK cell monolayer and ex-vivo rat intestines. FITC-labeled dextran (FD) was loaded inside the inner oil phase of SEN by the formation of FD-phospholipid solid dispersion (FDPS). After digestion, the droplet size increased from 31.06 ± 2.10 nm to 494.6 ± 22.1 nm, and the FD content in the external aqueous phase increased from 41.6 ± 4.2% to 61.1 ± 4.4%. Compared to the FD solution, SEN without digestion enhanced the transport of FD through MDCK cell monolayer 4.1 times and through rat intestines 3.0-7.4 times. However, the digestion reduced the transport of FD 3.5 times through MDCK cell monolayer and 1.3-2.0 times through rat intestines, compared to that without digestion. This reduction was due to the destruction of lipid nano-droplets and release of FD to the external aqueous phase of SEN. This finding should be considered when SEN is used as a delivery system for hydrophilic macromolecules.
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Affiliation(s)
- Pulkit Khatri
- AmbioPharm, Inc., 1024 Dittman Court, North Augusta, SC, 29842, USA
| | - Jun Shao
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, 8000 Utopia Parkway, Queens, NY, 11439, USA.
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