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Kumar M, Jha A, Bharti K, Manjit M, Kumbhar P, Dhapte-Pawar V, Mishra B. Lipid-coated nanocrystals of paclitaxel as dry powder for inhalation: Characterization, in-vitro performance, and pharmacokinetic assessment. Colloids Surf B Biointerfaces 2024; 237:113865. [PMID: 38520950 DOI: 10.1016/j.colsurfb.2024.113865] [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: 01/04/2024] [Revised: 03/07/2024] [Accepted: 03/19/2024] [Indexed: 03/25/2024]
Abstract
BACKGROUND Nanocrystals can be produced as a dry powder for inhalation (DPIs) to deliver high doses of drug to the lungs, owing to their high payload and stability to the shear stress of aerosolization force. Furthermore, lipid-coated nanocrystals can be formulated to improve the drug accumulation and retention in lung. OBJECTIVE The present work involved the fabrication of paclitaxel nanocrystals using hydrophilic marine biopolymer fucoidan as a stabilizer. Thereafter, fabricated nanocrystals (FPNC) were surface-modified with phospholipid to give lipid-coated nanocrystals (Lipo-NCs). METHODS The nanocrystals were fabricated by antisolvent crystallization followed by the probe sonication. The lipid coating was achieved by thin film hydration followed ultrasonic dispersion technique. Prepared nanocrystals were lyophilized to obtain a dry powder of FPNC and Lipo-NCs, used later for physicochemical, microscopic, and spectroscopic characterization to confirm the successful formation of desired nanocrystals. In-vitro and in-vivo investigations were also conducted to determine the role of nanocrystal powder in pulmonary drug delivery. RESULTS Lipo-NCs exhibited slower drug release, excellent flow properties, good aerosolization performance, higher drug distribution, and prolonged retention in the lungs compared to FPNC and pure PTX. CONCLUSION Lipid-coated nanocrystals can be a novel formulation for the maximum localization of drugs in the lungs, thereby enhancing therapeutic effects and avoiding systemic side effects in lung cancer therapy.
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Affiliation(s)
- Manish Kumar
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, (Banaras Hindu University), Varanasi, Uttar Pradesh 221005, India
| | - Abhishek Jha
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, (Banaras Hindu University), Varanasi, Uttar Pradesh 221005, India
| | - Kanchan Bharti
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, (Banaras Hindu University), Varanasi, Uttar Pradesh 221005, India
| | - Manjit Manjit
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, (Banaras Hindu University), Varanasi, Uttar Pradesh 221005, India
| | - Pradnya Kumbhar
- Department of Pharmaceutics, Poona College of Pharmacy, Bharati Vidyapeeth (Deemed to be University), Pune, Maharashtra 411038, India
| | - Vividha Dhapte-Pawar
- Department of Pharmaceutics, Poona College of Pharmacy, Bharati Vidyapeeth (Deemed to be University), Pune, Maharashtra 411038, India
| | - Brahmeshwar Mishra
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, (Banaras Hindu University), Varanasi, Uttar Pradesh 221005, India.
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2
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Chutoprapat R, Witarat J, Jongpanyangarm P, Mang Sung Thluai L, Khankaew P, Wah Chan L. Development of solid lipid microparticles (SLMs) containing asiatic acid for topical treatment of acne: Characterization, stability, in vitro and in vivo anti-acne assessment. Int J Pharm 2024; 654:123980. [PMID: 38460769 DOI: 10.1016/j.ijpharm.2024.123980] [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: 09/03/2023] [Revised: 02/18/2024] [Accepted: 03/06/2024] [Indexed: 03/11/2024]
Abstract
Solid lipid microparticles (SLMs) represent a promising approach for drug delivery in anti-acne applications. In this study, asiatic acid-loaded SLMs (AASLMs) were prepared by melt emulsification method in conjunction with freeze-drying. Comprehensive evaluations comprised particle size, %entrapment efficiency (%EE), %labeled amount (%LA), surface morphology, stability, %release, %skin permeation, and anti-acne activity. The AASLMs exhibited an average particle size ranging from 7.46 to 38.86 µm, with %EE and %LA falling within the range of 31.56 to 100.00 and 90.43 to 95.38, respectively. The AASLMs demonstrated a spherical shape under scanning electron microscopy, and maintained stability over a 3-month period. Notably, formulations with 10 % and 15 % cetyl alcohol stabilized with poloxamer-188 (specifically F6 and F12) displayed a minimum inhibitory concentration (MIC) value of 75 mg/ml against Cutibacterium acnes. Furthermore, F12 exhibited a higher %release and %skin permeation compared to F6 over 24 h. In a single-blind clinical trial involving fifteen participants with mild-to-moderate acne, F12 showcased its potential not only in reducing porphyrin intensity and enhancing skin barriers but also in significantly improving skin hydration and brightness. However, further investigations with larger subject cohorts encompassing diverse age groups and genders are necessary to thoroughly establish the performance of the developed AASLMs.
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Affiliation(s)
- Romchat Chutoprapat
- Cosmetic Science Program, Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University Bangkok, 10330, Thailand.
| | - Jatuporn Witarat
- Cosmetic Science Program, Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University Bangkok, 10330, Thailand
| | - Panalee Jongpanyangarm
- Cosmetic Science Program, Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University Bangkok, 10330, Thailand
| | - Lucy Mang Sung Thluai
- Cosmetic Science Program, Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University Bangkok, 10330, Thailand
| | - Pichanon Khankaew
- Cosmetic Science Program, Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University Bangkok, 10330, Thailand
| | - Lai Wah Chan
- Department of Pharmacy, National University of Singapore, Singapore.
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3
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Sandal P, Patel P, Singh D, Gupta GD, Kurmi BD. α-Tocopherol Polyethylene Glycol 1000 Succinate-Based Cationic Liposome for the Intracellular Delivery of Doxorubicin in MDA-MB-231 Triple-Negative Breast Cancer Cell Line. Assay Drug Dev Technol 2023; 21:345-356. [PMID: 38010987 DOI: 10.1089/adt.2023.067] [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] [Indexed: 11/29/2023] Open
Abstract
Present research work reports the development of doxorubicin (DOX) loaded α-tocopherol polyethylene glycol 1000 succinate (TPGS)-coated cationic liposomes. The developed formulation was evaluated for its anticancer potential and intracellular uptake against the MDA-MB-231 breast cancer cell line. Moreover, hemocompatibility studies were also done on human blood red blood cells for the determination of blood compatibility. The prepared doxorubicin-loaded TPGS liposomes (DOX-LIPO-TPGS) and doxorubicin-loaded cationic liposomes (DOX-LIPO+-TPGS) reveal vesicle size (177.5 ± 2.5 and 201.7 ± 2.3 nm), polydispersity index (0.189 ± 0.01 and 0.218 ± 0.02), zeta potential (-36.9 ± 0.7 and 42 ± 0.9 mv), and % entrapment efficiency (65.88% ± 3.7% and 74.5% ± 3.9%). Furthermore, in vitro, drug release kinetics of the drug alone and drug from formulation shows sustained release behavior of developed formulation with 99.98% in 12 h and 80.98% release of the drug in 72 h, respectively. In addition, cytotoxicity studies and cellular DOX uptake on the MDA-MB-231 breast cancer cell line depict higher cytotoxic and drug uptake potential with better hemocompatibility of DOX-LIPO+-TPGS with respect to DOX. The data from the study revealed that TPGS plays an important role in enhancing the formulation's quality attributes like stability, drug release, cytotoxicity, and hemocompatibility behavior. This may serve that TPGS-coated cationic liposome as a vital candidate for the treatment of cancer and drug delivery in case of breast cancer.
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Affiliation(s)
- Pallavi Sandal
- Department of Pharmaceutics, ISF College of Pharmacy, Moga, India
| | - Preeti Patel
- Department of Pharmaceutical Chemistry, ISF College of Pharmacy, Moga, India
| | - Dilpreet Singh
- Department of Pharmaceutics, ISF College of Pharmacy, Moga, India
- University Institute of Pharma Sciences, Chandigarh University, Mohali, India
| | | | - Balak Das Kurmi
- Department of Pharmaceutics, ISF College of Pharmacy, Moga, India
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4
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Kurmi BD, Patel P, Paliwal R, Kumar P, Paliwal SR. Multifunctional nanotherapeutics for intracellular trafficking of doxorubicin against breast cancer. Nanomedicine (Lond) 2023; 18:1261-1279. [PMID: 37721134 DOI: 10.2217/nnm-2023-0087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023] Open
Abstract
Aims: To develop an estrone-targeted d-alpha-tocopherol polyethylene glycol 1000 succinate (TPGS)-based liposomal system for enhanced intracellular delivery of doxorubicin (DOX). Materials & methods: Zetasizer, transmission electron microscopy, energy dispersive x-ray, Fourier-transform infrared spectroscopy, differential scanning calorimetry, x-ray diffraction, confocal laser scanning microscopy and FACS analysis were used for formulation characterization and evaluation. Results: The DOX-LIPO-TPGS and DOX-LIPO-TPGS-estrone formulations had vesicle sizes (117.6 ± 3.51; 144 ± 5.00 nm), zeta potential (-36.4 ± 0.75; -35.8 ± 0.76), polydispersity index (0.123 ± 0.005; 0.169 ± 0.005) and percent entrapment efficiency (73.56 ± 3.55; 77.16 ± 3.83%) with improved cytotoxicity and cellular uptake, confirming the targeted potential of the developed formulations. Conclusion: The results suggest that the developed liposomal formulation with desired characteristics is potentially capable of nonimmunogenic, site-specific drug delivery to targeted cancer sites and reduced DOX-associated cardiac toxicity.
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Affiliation(s)
- Balak Das Kurmi
- Department of Pharmacy, School of Studies of Natural Resources, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, 495009, India
- ISF College of Pharmacy, GT Road, Moga, Punjab, 142001, India
| | - Preeti Patel
- Department of Pharmacy, School of Studies of Natural Resources, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, 495009, India
- ISF College of Pharmacy, GT Road, Moga, Punjab, 142001, India
| | - Rishi Paliwal
- Department of Pharmacy, Nanomedicine & Bioengineering Research Laboratory, Indira Gandhi National Tribal University, Amarkantak, 484887, India
| | - Pramod Kumar
- Comprehensive Pneumology Center, Institute of Lung Health & Immunity, Helmholtz Zentrum, D-85764, Munich, Germany
| | - Shivani Rai Paliwal
- Department of Pharmacy, School of Studies of Natural Resources, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, 495009, India
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5
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Mohandoss S, Velu KS, Stalin T, Ahmad N, Alomar SY, Lee YR. Tenofovir antiviral drug solubility enhancement with β-cyclodextrin inclusion complex and in silico study of potential inhibitor against SARS-CoV-2 main protease (M pro). J Mol Liq 2023; 377:121544. [PMID: 36874474 PMCID: PMC9968670 DOI: 10.1016/j.molliq.2023.121544] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/13/2023] [Accepted: 02/24/2023] [Indexed: 03/03/2023]
Abstract
Tenofovir (TFR) is an antiviral drug commonly used to fight against viral diseases infection due to its good potency and high genetic barrier to drug resistance. In physiological conditions, TFR is less water soluble, more unstable, and less permeable, limiting its effective therapeutic applications. In addition to their use in treating the Coronavirus disease 2019 (COVID-19), cyclodextrins (CDs) are also being used as a molecule to develop therapies for other diseases due to its enhance solubility and stability. This study is designed to synthesize and characterization of β-CD:TFR inclusion complex and its interaction against SARS-CoV-2 (MPro) protein (PDB ID;7cam). Several techniques were used to characterize the prepared β-CD:TFR inclusion complex, including UV-Visible, FT-IR, XRD, SEM, TGA, and DSC, which provided appropriate evidence to confirm the formation. A 1:1 stoichiometry was determined for β-CD:TFR inclusion complex in aqueous medium from UV-Visible absorption spectra by using the Benesi-Hildebrand method. Phase solubility studies proposed that β-CD enhanced the excellent solubility of TFR and the stability constant was obtained at 863 ± 32 M-1. Moreover, the molecular docking confirmed the experimental results demonstrated the most desirable mode of TFR encapsulated into the β-CD nanocavity via hydrophobic interactions and possible hydrogen bonds. Moreover, TFR was validated in the β-CD:TFR inclusion complex as potential inhibitors against SARS-CoV-2 main protease (Mpro) receptors by using in silico methods. The enhanced solubility, stability, and antiviral activity against SARS-CoV-2 (MPro) suggest that β-CD:TFR inclusion complexes can be further used as feasible water-insoluble antiviral drug carriers in viral disease infection.
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Affiliation(s)
- Sonaimuthu Mohandoss
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Kuppu Sakthi Velu
- Department of Industrial Chemistry, Alagappa University, Karikudi 630003, Tamilnadu, India
| | - Thambusamy Stalin
- Department of Industrial Chemistry, Alagappa University, Karikudi 630003, Tamilnadu, India
| | - Naushad Ahmad
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Suliman Yousef Alomar
- Doping Research Chair, Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
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6
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AbuBakr AH, Hassan HAFM, Abdalla A, Khowessah OM, Abdelbary GA. Therapeutic potential of cationic bilosomes in the treatment of carrageenan-induced rat arthritis via fluticasone propionate gel. Int J Pharm 2023; 635:122776. [PMID: 36841370 DOI: 10.1016/j.ijpharm.2023.122776] [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: 01/13/2023] [Revised: 02/10/2023] [Accepted: 02/20/2023] [Indexed: 02/25/2023]
Abstract
Arthritis is a debilitating disease that affects the patient's mobility and quality of life. This study focused on the development and optimization of a cationic nanosized bilosomal formula for the efficient transdermal treatment of arthritis. An optimum Fluticasone Propionate-loaded bilosomes (OFP) was developed using the Draper-Lin small composite design based on the optimization of 4 factors and evaluation of entrapment efficiency (Y1), vesicle size (Y2), skin flux (Y3), and skin accumulation (Y4). The OFP was characterized against the drug suspension, loaded into a Carbopol gel, and a histopathological assessment was conducted on a carrageenan-induced rat joint arthritis in comparison with cultivate® cream and traditional gel. Interluekin-1β and TNF-α levels were also measured. The optimal formula was formulated using 2.99% phospholipon90G, 0.04% sodium deoxycholate, and 0.29% stearylamine, and showed 84.72%, 268.13 nm, 5.89 µg/cm2/h, and 16.21 µg/cm2 /24 h for Y1, Y2, Y3, and Y4, respectively. The thermal analysis of OFP demonstrated a single broad endothermic peak for bilosomes with no detectable peak for the amorphous drug. TEM images revealed the spherical structures of the nanosized OFP, while CLSM demonstrated enhanced permeation efficiency over the drug suspension. The in-vivo study further proved the promising efficacy of the optimum OFP, where a complete recovery of the normal histological structure of a rat joint and normal levels of the inflammatory markers were observed within 20 days following once daily application of the optimum bilosomal gel. Therefore, OFP represents a competent nanocarrier for efficient transdermal management of joint arthritis.
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Affiliation(s)
- Abdel-Hameed AbuBakr
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Egyptian Russian University, Po.Box 11829, Badr City, Cairo, Egypt.
| | - Hatem A F M Hassan
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, 11562 Cairo, Egypt; School of Life and Medical Sciences, University of Hertfordshire Hosted by Global Academic Foundation, New Administrative Capital, Cairo, Egypt
| | - Ahmed Abdalla
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Egyptian Russian University, Po.Box 11829, Badr City, Cairo, Egypt
| | - Omneya M Khowessah
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, 11562 Cairo, Egypt
| | - Ghada A Abdelbary
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, 11562 Cairo, Egypt
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7
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Development of novel lipid matrix for improved sustained release effect of a hydrophilic drug via response surface methodology. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2021.102993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Mehta CH, Narayan R, Acharya S, Nayak UY. Design and development of surface modified epigallocatechin 3-gallate NanoCubogel for localized delivery to oral submucous fibrosis therapy. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Ulu A, Sezer SK, Yüksel Ş, Koç A, Ateş B. Preparation, Controlled Drug Release, and Cell Viability Evaluation of Tenofovir Alafenamide‐Loaded Chitosan Nanoparticles. STARCH-STARKE 2021. [DOI: 10.1002/star.202100144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ahmet Ulu
- Biochemistry and Biomaterials Research Laboratory Department of Chemistry Faculty of Arts and Science İnönü University Malatya 44280 Turkey
| | - Selcen Korkmaz Sezer
- Department of Medical Genetics Faculty of Medicine Turgut Ozal Medical Center İnönü University Malatya 44280 Turkey
| | - Şengül Yüksel
- Department of Medical Genetics Faculty of Medicine Turgut Ozal Medical Center İnönü University Malatya 44280 Turkey
| | - Ahmet Koç
- Department of Medical Genetics Faculty of Medicine Turgut Ozal Medical Center İnönü University Malatya 44280 Turkey
| | - Burhan Ateş
- Biochemistry and Biomaterials Research Laboratory Department of Chemistry Faculty of Arts and Science İnönü University Malatya 44280 Turkey
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10
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Lipid Nanocarriers for Anti-HIV Therapeutics: A Focus on Physicochemical Properties and Biotechnological Advances. Pharmaceutics 2021; 13:pharmaceutics13081294. [PMID: 34452255 PMCID: PMC8398060 DOI: 10.3390/pharmaceutics13081294] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/03/2021] [Accepted: 08/07/2021] [Indexed: 12/13/2022] Open
Abstract
Since HIV was first identified, and in a relatively short period of time, AIDS has become one of the most devastating infectious diseases of the 21st century. Classical antiretroviral therapies were a major step forward in disease treatment options, significantly improving the survival rates of HIV-infected individuals. Even though these therapies have greatly improved HIV clinical outcomes, antiretrovirals (ARV) feature biopharmaceutic and pharmacokinetic problems such as poor aqueous solubility, short half-life, and poor penetration into HIV reservoir sites, which contribute to the suboptimal efficacy of these regimens. To overcome some of these issues, novel nanotechnology-based strategies for ARV delivery towards HIV viral reservoirs have been proposed. The current review is focused on the benefits of using lipid-based nanocarriers for tuning the physicochemical properties of ARV to overcome biological barriers upon administration. Furthermore, a correlation between these properties and the potential therapeutic outcomes has been established. Biotechnological advancements using lipid nanocarriers for RNA interference (RNAi) delivery for the treatment of HIV infections were also discussed.
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11
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Kurmi BD, Paliwal SR. Development and Optimization of TPGS based Stealth Liposome of Doxorubicin Using Box-Behnken Design: Characterization, Hemocompatibility and Cytotoxicity Evaluation in Breast Cancer Cells. J Liposome Res 2021; 32:129-145. [PMID: 33724151 DOI: 10.1080/08982104.2021.1903034] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The present work reports the development of doxorubicin (DOX) encapsulated α-Tocopherol polyethylene glycol 1000 succinate (TPGS) coated liposomal system (DOX-LIPO-TPGS) by quality by design (QbD) approach and evaluated for its anticancer and hemocompatibility potential. The screening and optimization of formulation variables were performed by the systematic design of experiments (DoE), using Taguchi and Box-Behnken Design (BBD) for their desired quality attributes. The QbD optimized DOX-LIPO (DOX encapsulated uncoated liposome) and DOX-LIPO-TPGS formulation showed nano-metric vesicle size (98.2 ± 3.1 &117.6 ± 3.5 nm) with favorable development parameters, i.e. PDI (0.262 ± 0.008 & 0.123 ± 0.005); ZP (-38.7 ± 0.5 &-36.4 ± 0.7 mV) and % EE (66.8 ± 3.3 & 73.5 ± 3.5%) respectively. The release kinetics parameters suggested, sustained release behavior of developed liposomal formulations (83.6 ± 2.8 & 69.8 ± 2.2% releases in 72 h respectively). Cytotoxicity (MTT assay) on the MCF-7 breast cancer cell line and Hemolysis assay on RBCs stipulates comparatively higher anticancer potential and better hemocompatibility of DOX-LIPO-TPGS with respect to DOX-LIPO and the plain DOX solution. The study concluded that the QbD based three levels by three factors BBD optimization could be utilized for obtaining liposomal formulations with desired quality attributes. TPGS could be set out as a vital additive to improve the various quality parameters including stealthing character, stability, kinetic release, cytotoxicity, and hemocompatibility of liposomal formulations. This may serve as a focal paradigm for using TPGS coated liposomes as anticancer drug delivery vehicle in normal and MDR carcinoma.
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Affiliation(s)
- Balak Das Kurmi
- SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya, Bilaspur-495009, India
| | - Shivani Rai Paliwal
- SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya, Bilaspur-495009, India
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12
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Costa Duarte FÍ, Sabino de Mendonça Costa AB, Vieira Filho JF, Pinto Freite VL, Alves Freire JV, Converti A, Ferrari M, Barreto Gomes AP, Ostrosky EA, Neves de Lima ÁA. In vitro release studies of ferulic acid in semi-solid formulations with optimized synthetic membrane. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2020.102106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Ahmed TA, Alzahrani MM, Sirwi A, Alhakamy NA. The Antifungal and Ocular Permeation of Ketoconazole from Ophthalmic Formulations Containing Trans-Ethosomes Nanoparticles. Pharmaceutics 2021; 13:151. [PMID: 33498849 PMCID: PMC7912274 DOI: 10.3390/pharmaceutics13020151] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 01/10/2021] [Accepted: 01/21/2021] [Indexed: 01/18/2023] Open
Abstract
Ketoconazole (KET), a synthetic imidazole broad-spectrum antifungal agent, is characterized by its poor aqueous solubility and high molecular weight, which might hamper its corneal permeation. The aim was to develop an ophthalmic formulation loaded with optimized trans-ethosomal vesicles to enhance KET ocular permeation, antifungal activity, rapid drug drainage, and short elimination half-life. Four formulation factors affecting the vesicles' size, zeta potential, entrapment efficiency, and flexibility of the trans-ethosomes formulations were optimized. The optimum formulation was characterized, and their morphological and antifungal activity were studied. Different ophthalmic formulations loaded with the optimized vesicles were prepared and characterized. The ocular irritation and in vivo corneal permeation were investigated. Results revealed that the drug-to-phospholipid-molar ratio, the percentage of edge activator, the percentage of ethanol, and the percentage of stearyl amine significantly affect the characteristics of the vesicles. The optimized vesicles were spherical and showed an average size of 151.34 ± 8.73 nm, a zeta potential value of +34.82 ± 2.64 mV, an entrapment efficiency of 94.97 ± 5.41%, and flexibility of 95.44 ± 4.33%. The antifungal activity of KET was significantly improved following treatment with the optimized vesicles. The developed in situ gel formulations were found to be nonirritating to the cornea. The trans-ethosomes vesicles were able to penetrate deeper into the posterior eye segment without any toxic effects. Accordingly, the in situ developed gel formulation loaded with KET trans-ethosomes vesicles represents a promising ocular delivery system for the treatment of deep fungal eye infections.
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Affiliation(s)
- Tarek A. Ahmed
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.M.A.); (N.A.A.)
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Al-Azhar University, Cairo 11651, Egypt
| | - Maram M. Alzahrani
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.M.A.); (N.A.A.)
- Department of Pharmaceutics, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Alaa Sirwi
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Nabil A. Alhakamy
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.M.A.); (N.A.A.)
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14
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Nanoliposomes in polymeric granules: Novel process strategy to produce stable and versatile delivery systems. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Martin-Illana A, Cazorla-Luna R, Notario-Pérez F, Ruiz-Caro R, Bedoya LM, Veiga-Ochoa MD, Rubio J, Tamayo A. Amino Functionalized Micro-Mesoporous Hybrid Particles for the Sustained Release of the Antiretroviral Drug Tenofovir. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E3494. [PMID: 32784712 PMCID: PMC7476006 DOI: 10.3390/ma13163494] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/03/2020] [Accepted: 08/05/2020] [Indexed: 02/07/2023]
Abstract
The sustained release of an antiretroviral agent to women mucosa has been proved as an excellent strategy to reduce the sexual transmission of HIV. Hybrid micro-mesoporous particles have been synthesized and functionalized with a silane coupling agent followed by loading the antiretroviral tenofovir. It has been observed that the disposition of the silane molecule on the surface of the particles determines the interaction mechanism with the antiretroviral molecule loaded independently on the surface area of the particles. In this sense, available and free amino groups are required to achieve a smart pH-responsive material, a condition that is only achieved in those materials containing a silane chemisorbed monolayer. Moreover, the modulation of the release kinetics attributed to the presence of the silane monolayer covering the mesopores has been confirmed by fitting the releasing curves to the first order and Weibull models. The developed micro-mesoporous particles have been demonstrated to be excellent smart-release vehicles for antiviral agents and can be safely used in polymer mucoadhesive vaginal gels.
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Affiliation(s)
- Araceli Martin-Illana
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Universidad Complutense de Madrid, Plaza Ramón y Cajal s.n, 28007 Madrid, Spain; (A.M.-I.); (R.C.-L.); (F.N.-P.); (R.R.-C.); (M.D.V.-O.)
| | - Raul Cazorla-Luna
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Universidad Complutense de Madrid, Plaza Ramón y Cajal s.n, 28007 Madrid, Spain; (A.M.-I.); (R.C.-L.); (F.N.-P.); (R.R.-C.); (M.D.V.-O.)
| | - Fernando Notario-Pérez
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Universidad Complutense de Madrid, Plaza Ramón y Cajal s.n, 28007 Madrid, Spain; (A.M.-I.); (R.C.-L.); (F.N.-P.); (R.R.-C.); (M.D.V.-O.)
| | - Roberto Ruiz-Caro
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Universidad Complutense de Madrid, Plaza Ramón y Cajal s.n, 28007 Madrid, Spain; (A.M.-I.); (R.C.-L.); (F.N.-P.); (R.R.-C.); (M.D.V.-O.)
| | - Luis Miguel Bedoya
- Department of Pharmacology, Pharmacognosy and Botany, Faculty of Pharmacy, Universidad Complutense de Madrid, Plaza Ramón y Cajal s.n, 28007 Madrid, Spain;
| | - Maria Dolores Veiga-Ochoa
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Universidad Complutense de Madrid, Plaza Ramón y Cajal s.n, 28007 Madrid, Spain; (A.M.-I.); (R.C.-L.); (F.N.-P.); (R.R.-C.); (M.D.V.-O.)
| | - Juan Rubio
- Institute of Ceramics and Glass, CSIC, Kelsen 5, 28049 Madrid, Spain;
| | - Aitana Tamayo
- Institute of Ceramics and Glass, CSIC, Kelsen 5, 28049 Madrid, Spain;
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Messeder MMDS, Miranda D, Lamas de Souza SO, Dorneles M, Giunchetti R, Oréfice RL. Positively-charged electrosprayed nanoparticles based on biodegradable polymers containing amphotericin B for the treatment of leishmaniasis. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1785457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Manuela Maria de Sousa Messeder
- Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Diego Miranda
- Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
- Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais (IFMG), Belo Horizonte, MG, Brazil
| | - Sarah Oliveira Lamas de Souza
- Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Matheus Dorneles
- Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Rodolfo Giunchetti
- Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Rodrigo Lambert Oréfice
- Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
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Bazzo GC, Mostafa D, França MT, Pezzini BR, Stulzer HK. How tenofovir disoproxil fumarate can impact on solubility and dissolution rate of efavirenz? Int J Pharm 2019; 570:118597. [PMID: 31401297 DOI: 10.1016/j.ijpharm.2019.118597] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/30/2019] [Accepted: 08/03/2019] [Indexed: 12/16/2022]
Abstract
Efavirenz (EFZ) and tenofovir disoproxil fumarate (TDF) can be used simultaneously in the treatment of human immunodeficiency virus type1 infection. In this work the impact of TDF, a hydrophilic drug, on the solubility and dissolution rate of EFZ, a poorly water-soluble drug, was evaluated. EFZ/TDF binary mixtures in different molar ratios were prepared. Differential scanning calorimetry (DSC) results indicate the formation of a eutectic mixture, the molar ratio of 65/35 being the eutectic point. It was observed an increase in the EFZ solubility in water and acidic conditions (0.1 N HCl and biorelevant medium), in the presence of TDF. On the other hand, there was a decreasing on EFZ solubility in phosphate buffer pH 6.8, probably influenced by the lower solubility of TDF in this medium. The high solubility of TDF in water and acidic medium may have contributed to improve the solubility of EFZ, as well as the formation of a eutectic mixture, supported by X-ray powder diffraction (XRPD) and Fourier Transform infrared spectroscopy (FTIR) analyses. However, TDF solubility and dissolution rate was not significantly influenced by the presence of EFZ.
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Affiliation(s)
- Giovana Carolina Bazzo
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Trindade, 88040-970 Florianópolis, SC, Brazil
| | - Dina Mostafa
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Trindade, 88040-970 Florianópolis, SC, Brazil
| | - Maria Terezinha França
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Trindade, 88040-970 Florianópolis, SC, Brazil
| | - Bianca Ramos Pezzini
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Trindade, 88040-970 Florianópolis, SC, Brazil
| | - Hellen Karine Stulzer
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Trindade, 88040-970 Florianópolis, SC, Brazil.
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Rapid measures of user's adherence to vaginal drug products using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and multivariate discriminant techniques. PLoS One 2018; 13:e0197906. [PMID: 29799875 PMCID: PMC5969765 DOI: 10.1371/journal.pone.0197906] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 05/10/2018] [Indexed: 11/30/2022] Open
Abstract
Background The topical HIV prevention (microbicides) field is in acute need of a method to rapidly and objectively measure adherence to product use in clinical trials. Infrared (IR) spectroscopy has been used in many pharmaceutical and forensic applications but has yet to be applied to adherence monitoring. In this study, we report on efforts to test the feasibility of using IR spectroscopy as a means to measure residual active or placebo vaginal product, semen exposure and vaginal insertion from a single swab. Methods A portable IR spectrometer equipped with diamond attenuated total reflectance (ATR) was used to capture spectra of unused vs. vaginally-used swabs, vaginal swabs containing semen, and vaginal swabs to which either tenofovir-containing or matching placebo products (vaginal gel or insert) were added. Spectral data obtained from swabs placed directly on the spectrometer were divided into calibration and testing sets for developing and validating discriminant models set up to provide yes/no predictions of: vaginal vs. non-vaginal use, presence vs. no presence of each test product, and presence vs. no presence of semen. Further validation of models was performed using vaginal swabs collected from a clinical study evaluating vaginally administered placebo insert formulations. Results For each discriminant model developed to predict vaginal vs. non-vaginal use, presence vs. no presence of each test product, and presence vs. no presence of semen, classified validation samples not included in the model development were correctly identified into their respective classes with minimal prediction error. Clinically obtained vaginal swabs collected 15–60 minutes after placebo insert use were also correctly identified, further validating the models. Conclusion Our findings demonstrate the proof of concept that IR spectroscopy can be a method for rapid detection and characterization of microbicide products and biological fluids present in vaginal swabs. This novel method has potential to support real-time, on-site adherence monitoring in clinical or field settings.
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Timur SS, Şahin A, Aytekin E, Öztürk N, Polat KH, Tezel N, Gürsoy RN, Çalış S. Design and in vitro evaluation of tenofovir-loaded vaginal gels for the prevention of HIV infections. Pharm Dev Technol 2017; 23:301-310. [PMID: 28503983 DOI: 10.1080/10837450.2017.1329835] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Infection with the human immunodeficiency virus (HIV) is affecting women disproportionally with increasing incidence rates over the last decades. Tenofovir is one of the most commonly used antiretroviral agents, which belongs to the nucleoside/nucleotide reverse transcriptase inhibitor family, for the prevention of HIV acquisition. In scope of this study, a thermogelling system containing tenofovir-loaded chitosan nanoparticles for the controlled release of tenofovir was developed and characterized. The in vitro release studies have shown that the burst release effect was decreased to 27% with f-TFV CS NPs-Gel. Gelation temperature of developed formulation was found as 26.6 ± 0.2 °C, which provides ease of administration while gelation occurs after the administration to the vagina. The work of adhesion values was used as parameters for comparison of mucoadhesive performance and the mucoadhesion of f-TFV CS NPs-Gel was found as 0.516 ± 0.136 N.s at 37 °C. The biocompatibility of blank formulations was evaluated by cell viability studies using L929 cells, in which Gel + CS NPs formulation was found to be safe with 82.4% and 90.2% cell viability for 1:16 and 1:32 dilutions, respectively. In conclusion, an improved tenofovir containing vaginal gel formulation was successfully developed and evaluated for preventing HIV transmission.
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Affiliation(s)
- Selin Seda Timur
- a Faculty of Pharmacy, Department of Pharmaceutical Technology , Hacettepe University , Ankara , Turkey
| | - Adem Şahin
- a Faculty of Pharmacy, Department of Pharmaceutical Technology , Hacettepe University , Ankara , Turkey
| | - Eren Aytekin
- a Faculty of Pharmacy, Department of Pharmaceutical Technology , Hacettepe University , Ankara , Turkey
| | - Naile Öztürk
- a Faculty of Pharmacy, Department of Pharmaceutical Technology , Hacettepe University , Ankara , Turkey
| | - Kerem Heybet Polat
- a Faculty of Pharmacy, Department of Pharmaceutical Technology , Hacettepe University , Ankara , Turkey
| | - Nurten Tezel
- a Faculty of Pharmacy, Department of Pharmaceutical Technology , Hacettepe University , Ankara , Turkey
| | - Reyhan Neslihan Gürsoy
- a Faculty of Pharmacy, Department of Pharmaceutical Technology , Hacettepe University , Ankara , Turkey
| | - Sema Çalış
- a Faculty of Pharmacy, Department of Pharmaceutical Technology , Hacettepe University , Ankara , Turkey
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Rambharose S, Kalhapure RS, Govender T. Nanoemulgel using a bicephalous heterolipid as a novel approach to enhance transdermal permeation of tenofovir. Colloids Surf B Biointerfaces 2017; 154:221-227. [PMID: 28343120 DOI: 10.1016/j.colsurfb.2017.03.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 02/21/2017] [Accepted: 03/17/2017] [Indexed: 11/30/2022]
Abstract
Improvements in permeation enhancement strategies, such as nanoemulsions (NEs) and nanoemulgels (NEGs), have led to a renewed interest in transdermal drug delivery (TDD). This study aimed to investigate the potential of LLA1E, a novel dendritic permeation enhancer, as an oily phase in the development of a NEG for the TDD of tenofovir (TNF). TNF loaded NEs (TNEs) were prepared and analysed for mean globule diameter (MGD), polydispersity index (PDI), zeta potential (ZP) and morphology. NEGs of the TNEs (TNEGs) were prepared and evaluated for ex vivo transdermal permeation efficacy. The skin integrity before and after the experiments was assessed using histology and transepithelial electrical resistance (TEER). TNEs had a MGD of 129.06±3.35nm, a PDI of 0.192±0.038 and a ZP of 20.9±2.02mV, with an incorporation efficiency of 91.94±0.84%. There was no significant change is these properties after incorporating the TNEs into the hydrogel, as MGD, PDI and ZP of TNEGs were found to be 136.13±5.21nm, 0.182±0.020 and -20.9±2.08mV respectively. Ex vivo permeation studies showed that the TNEG significantly enhanced the TNF permeation by 39.65-fold, with a cumulative amount of 1866.54±108.62μgcm-2. Histological and TEER assessments showed no permanent effects on the skin by TNEG, indicating that this novel TNEG nanosystem has the potential to translate into clinical trials as treatment alternatives for HIV/AIDs patients.
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Affiliation(s)
- Sanjeev Rambharose
- Department of Pharmaceutical Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa
| | - Rahul S Kalhapure
- Department of Pharmaceutical Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa.
| | - Thirumala Govender
- Department of Pharmaceutical Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa.
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Spinks CB, Zidan AS, Khan MA, Habib MJ, Faustino PJ. Pharmaceutical characterization of novel tenofovir liposomal formulations for enhanced oral drug delivery: in vitro pharmaceutics and Caco-2 permeability investigations. Clin Pharmacol 2017; 9:29-38. [PMID: 28260952 PMCID: PMC5327912 DOI: 10.2147/cpaa.s119875] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Tenofovir, currently marketed as the prodrug tenofovir disoproxil fumarate, is used clinically to treat patients with HIV/AIDS. The oral bioavailability of tenofovir is relatively low, limiting its clinical effectiveness. Encapsulation of tenofovir within modified long-circulating liposomes would deliver this hydrophilic anti-HIV drug to the reticuloendothelial system for better therapeutic efficacy. The objectives of the current study were to prepare and pharmaceutically characterize model liposomal tenofovir formulations in an attempt to improve their bioavailability. The entrapment process was performed using film hydration method, and the formulations were characterized in terms of encapsulation efficiency and Caco-2 permeability. An efficient reverse-phase high-performance liquid chromatography method was developed and validated for tenofovir quantitation in both in vitro liposomal formulations and Caco-2 permeability samples. Separation was achieved isocratically on a Waters Symmetry C8 column using 10 mM Na2PO4/acetonitrile pH 7.4 (95:5 v/v). The flow rate was 1 mL/min with a 12 min elution time. Injection volume was 10 µL with ultraviolet detection at 270 nm. The method was validated according to United States Pharmacopeial Convention category I requirements. The obtained result showed that tenofovir encapsulation within the prepared liposomes was dependent on the employed amount of the positive charge-imparting agent. The obtained results indicated that calibration curves were linear with r2 > 0.9995 over the analytical range of 1–10 µg/mL. Inter- and intraday accuracy and precision values ranged from 95% to 101% and 0.3% to 2.6%, respectively. The method was determined to be specific and robust. Regarding the potential of the prepared vectors to potentiate tenofovir permeability through the Caco-2 model, a 10-fold increase in tenofovir apparent permeability was observed compared to its oral solution. In conclusion, this novel and validated method was successfully applied to characterize both in vitro encapsulation efficiency and Caco-2 permeability transport for the pharmaceutical assessment of novel tenofovir formulations.
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Affiliation(s)
- Crystal B Spinks
- Department of Pharmaceutical Sciences, School of Pharmacy, Howard University, Washington, DC
| | - Ahmed S Zidan
- Division of Product Quality Research, Office of Pharmaceutical Quality, Food and Drug Administration, Silver Spring, MD, USA; Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Mansoor A Khan
- Irma Lerma Rangel College of Pharmacy, Texas A&M Health Science Center, College Station, TX, USA
| | - Muhammad J Habib
- Department of Pharmaceutical Sciences, School of Pharmacy, Howard University, Washington, DC
| | - Patrick J Faustino
- Division of Product Quality Research, Office of Pharmaceutical Quality, Food and Drug Administration, Silver Spring, MD, USA
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Machado A, Cunha-Reis C, Araújo F, Nunes R, Seabra V, Ferreira D, das Neves J, Sarmento B. Development and in vivo safety assessment of tenofovir-loaded nanoparticles-in-film as a novel vaginal microbicide delivery system. Acta Biomater 2016; 44:332-40. [PMID: 27544812 DOI: 10.1016/j.actbio.2016.08.018] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 07/18/2016] [Accepted: 08/16/2016] [Indexed: 02/04/2023]
Abstract
UNLABELLED Topical pre-exposure prophylaxis (PrEP) with antiretroviral drugs holds promise in preventing vaginal transmission of HIV. However, significant biomedical and social issues found in multiple past clinical trials still need to be addressed in order to optimize protection and users' adherence. One approach may be the development of improved microbicide products. A novel delivery platform comprising drug-loaded nanoparticles (NPs) incorporated into a thin polymeric film base (NPs-in-film) was developed in order to allow the vaginal administration of the microbicide drug candidate tenofovir. The system was optimized for relevant physicochemical features and characterized for biological properties, namely cytotoxicity and safety in a mouse model. Tenofovir-loaded poly(lactic-co-glycolic acid) (PLGA)/stearylamine (SA) composite NPs with mean diameter of 127nm were obtained with drug association efficiency above 50%, and further incorporated into an approximately 115μm thick, hydroxypropyl methylcellulose/poly(vinyl alcohol)-based film. The system was shown to possess suitable mechanical properties for vaginal administration and to quickly disintegrate in approximately 9min upon contact with a simulated vaginal fluid (SVF). The original osmolarity and pH of SVF was not affected by the film. Tenofovir was also released in a biphasic fashion (around 30% of the drug in 15min, followed by sustained release up to 24h). The incorporation of NPs further improved the adhesive potential of the film to ex vivo pig vaginal mucosa. Cytotoxicity of NPs and film was significantly increased by the incorporation of SA, but remained at levels considered tolerable for vaginal delivery of tenofovir. Moreover, histological analysis of genital tissues and cytokine/chemokine levels in vaginal lavages upon 14days of daily vaginal administration to mice confirmed that tenofovir-loaded NPs-in-film was safe and did not induce any apparent histological changes or pro-inflammatory response. Overall, obtained data support that the proposed delivery system combining the use of polymeric NPs and a film base may constitute an exciting alternative for the vaginal administration of microbicide drugs in the context of topical PrEP. STATEMENT OF SIGNIFICANCE The development of nanotechnology-based microbicides is a recent but promising research field seeking for new strategies to circumvent HIV sexual transmission. Different reports detail on the multiple potential advantages of using drug nanocarriers for such purpose. However, one important issue being frequently neglected regards the development of vehicles for the administration of microbicide nanosystems. In this study, we propose and detail on the development of a nanoparticle-in-film system for the vaginal delivery of the microbicide drug candidate tenofovir. This is an innovative approach that, to our best knowledge, had never been tested for tenofovir. Results, including those from in vivo testing, sustain that the proposed system is safe and holds potential for further development as a vaginal microbicide product.
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Giri TK, Mukherjee P, Barman TK, Maity S. Nano-encapsulation of capsaicin on lipid vesicle and evaluation of their hepatocellular protective effect. Int J Biol Macromol 2016; 88:236-43. [DOI: 10.1016/j.ijbiomac.2016.03.056] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 03/13/2016] [Accepted: 03/26/2016] [Indexed: 11/28/2022]
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Bavarsad N, Akhgari A, Seifmanesh S, Salimi A, Rezaie A. Statistical optimization of tretinoin-loaded penetration-enhancer vesicles (PEV) for topical delivery. ACTA ACUST UNITED AC 2016; 24:7. [PMID: 26926453 PMCID: PMC4772491 DOI: 10.1186/s40199-016-0142-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 02/05/2016] [Indexed: 12/04/2022]
Abstract
Background The aim of this study was to develop and optimize deformable liposome for topical delivery of tretinoin. Methods Liposomal formulations were designed based on the full factorial design and prepared by fusion method. The influence of different ratio of soy phosphatidylcholine and transcutol (independent variables) on incorporation efficiency and drug release in 15 min and 24 h (responses) from liposomal formulations was evaluated. Liposomes were characterized for their vesicle size and Differential Scanning Calorimetry (DSC) was used to investigate changes in their thermal behavior. The penetration and retention of drug was determined using mouse skin. Also skin histology study was performed. Results Particle size of all formulations was smaller than 20 nm. Incorporation efficiency of liposomes was 79–93 %. Formulation F7 (25:5) showed maximum drug release. Optimum formulations were selected based on the contour plots resulted by statistical equations of drug release in 15 min and 24 h. Solubility properties of transcutol led to higher skin penetration for optimum formulations compared to tretinoin cream. There was no significant difference between the amount of drug retained in the skin by applying optimum formulations and cream. Histopatological investigation suggested optimum formulations could decrease the adverse effect of tretinoin in liposome compared to conventional cream. Conclusion According to the results of the study, it is concluded that deformable liposome containing transcutol may be successfully used for dermal delivery of tretinoin.
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Affiliation(s)
- Neda Bavarsad
- Nanotechnology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. .,Department of Pharmaceutics, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Abbas Akhgari
- Targeted Drug Delivery Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Somayeh Seifmanesh
- Department of Pharmaceutics, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Anayatollah Salimi
- Nanotechnology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Pharmaceutics, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Annahita Rezaie
- Department of Pathobiology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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Shao J, Kraft JC, Li B, Yu J, Freeling J, Koehn J, Ho RJ. Nanodrug formulations to enhance HIV drug exposure in lymphoid tissues and cells: clinical significance and potential impact on treatment and eradication of HIV/AIDS. Nanomedicine (Lond) 2016; 11:545-64. [PMID: 26892323 DOI: 10.2217/nnm.16.1] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Although oral combination antiretroviral therapy effectively clears plasma HIV, patients on oral drugs exhibit much lower drug concentrations in lymph nodes than blood. This drug insufficiency is linked to residual HIV in cells of lymph nodes. While nanoformulations improve drug solubility, safety and delivery, most HIV nanoformulations are intended to extend plasma levels. A stable nanodrug combination that transports, delivers and accumulates in lymph nodes is needed to clear HIV in lymphoid tissues. This review discusses limitations of current oral combination antiretroviral therapy and advances in anti-HIV nanoformulations. A 'systems approach' has been proposed to overcome these limitations. This concept has been used to develop nanoformulations for overcoming drug insufficiency, extending cell and tissue exposure and clearing virus for treating HIV/AIDS.
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Affiliation(s)
- Jingwei Shao
- Cancer Metastasis Alert & Prevention Center, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, PR China.,Department of Pharmaceutics, University of Washington, Seattle, WA 98195, USA
| | - John C Kraft
- Department of Pharmaceutics, University of Washington, Seattle, WA 98195, USA
| | - Bowen Li
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Jesse Yu
- Department of Pharmaceutics, University of Washington, Seattle, WA 98195, USA
| | - Jennifer Freeling
- Department of Pharmaceutics, University of Washington, Seattle, WA 98195, USA
| | - Josefin Koehn
- Department of Pharmaceutics, University of Washington, Seattle, WA 98195, USA
| | - Rodney Jy Ho
- Cancer Metastasis Alert & Prevention Center, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, PR China.,Department of Pharmaceutics, University of Washington, Seattle, WA 98195, USA.,Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
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das Neves J, Nunes R, Machado A, Sarmento B. Polymer-based nanocarriers for vaginal drug delivery. Adv Drug Deliv Rev 2015; 92:53-70. [PMID: 25550217 DOI: 10.1016/j.addr.2014.12.004] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 11/07/2014] [Accepted: 12/18/2014] [Indexed: 10/24/2022]
Abstract
The vaginal delivery of various drugs is well described and its relevance established in current medical practice. Alongside recent advances and achievements in the fields of pharmaceutical nanotechnology and nanomedicine, there is an increasing interest in the potential use of different nanocarriers for the delivery of old and new pharmacologically active molecules with either therapeutic or prophylactic purposes. Nanosystems of polymeric nature in particular have been investigated over the last years and their interactions with mucosal fluids and tissues, as well as genital tract biodistribution upon vaginal administration, are now better understood. While different applications have been envisioned, most of the current research is focusing in the development of nano-formulations with the potential to inhibit the vaginal transmission of HIV upon sexual intercourse. The present work focuses its discussion on the potential and perils of polymer-based nanocarriers for the vaginal administration of different pharmacologically active molecules.
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Elzoghby AO, Vranic BZ, Samy WM, Elgindy NA. Swellable floating tablet based on spray-dried casein nanoparticles: Near-infrared spectral characterization and floating matrix evaluation. Int J Pharm 2015; 491:113-22. [DOI: 10.1016/j.ijpharm.2015.06.015] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 06/13/2015] [Accepted: 06/15/2015] [Indexed: 12/15/2022]
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Zidan AS, Aldawsari H. Ultrasound effects on brain-targeting mannosylated liposomes: in vitro and blood-brain barrier transport investigations. DRUG DESIGN DEVELOPMENT AND THERAPY 2015; 9:3885-98. [PMID: 26244012 PMCID: PMC4521675 DOI: 10.2147/dddt.s87906] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Delivering drugs to intracerebral regions can be accomplished by improving the capacity of transport through blood–brain barrier. Using sertraline as model drug for brain targeting, the current study aimed at modifying its liposomal vesicles with mannopyranoside. Box-Behnken design was employed to statistically optimize the ultrasound parameters, namely ultrasound amplitude, time, and temperature, for maximum mannosylation capacity, sertraline entrapment, and surface charge while minimizing vesicular size. Moreover, in vitro blood–brain barrier transport model was established to assess the transendothelial capacity of the optimized mannosylated vesicles. Results showed a dependence of vesicular size, mannosylation capacity, and sertraline entrapment on cavitation and bubble implosion events that were related to ultrasound power amplitude, temperature. However, short ultrasound duration was required to achieve >90% mannosylation with nanosized vesicles (<200 nm) of narrow size distribution. Optimized ultrasound parameters of 65°C, 27%, and 59 seconds for ultrasound temperature, amplitude, and time were elucidated to produce 81.1%, 46.6 nm, and 77.6% sertraline entrapment, vesicular size, and mannosylation capacity, respectively. Moreover, the transendothelial ability was significantly increased by 2.5-fold by mannosylation through binding with glucose transporters. Hence, mannosylated liposomes processed by ultrasound could be a promising approach for manufacturing and scale-up of brain-targeting liposomes.
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Affiliation(s)
- Ahmed S Zidan
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia ; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Hibah Aldawsari
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
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Trnka H, Palou A, Panouillot PE, Kauppinen A, Toiviainen M, Grohganz H, Alcalà M, Juuti M, Ketolainen J, Rantanen J. Near‐Infrared Imaging for High‐Throughput Screening of Moisture Induced Changes in Freeze‐Dried Formulations. J Pharm Sci 2014; 103:2839-2846. [DOI: 10.1002/jps.23948] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 02/03/2014] [Accepted: 02/24/2014] [Indexed: 11/11/2022]
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Near-Infrared and Fourier Transform Infrared Chemometric Methods for the Quantification of Crystalline Tacrolimus from Sustained-Release Amorphous Solid Dispersion. J Pharm Sci 2014; 103:2376-85. [DOI: 10.1002/jps.24055] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 05/16/2014] [Accepted: 05/20/2014] [Indexed: 11/07/2022]
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Zidan AS, Habib MJ. Maximized Mucoadhesion and Skin Permeation of Anti-AIDS-Loaded Niosomal Gels. J Pharm Sci 2014; 103:952-64. [DOI: 10.1002/jps.23867] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 12/10/2013] [Accepted: 01/03/2014] [Indexed: 01/24/2023]
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Agrahari V, Zhang C, Zhang T, Li W, Gounev TK, Oyler NA, Youan BBC. Hyaluronidase-sensitive nanoparticle templates for triggered release of HIV/AIDS microbicide in vitro. AAPS JOURNAL 2013; 16:181-93. [PMID: 24343770 DOI: 10.1208/s12248-013-9546-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 11/05/2013] [Indexed: 11/30/2022]
Abstract
This study was designed to test the hypothesis that a triggered release of a topical microbicide (tenofovir) from hyaluronic acid nanoparticles (HA-NPs) can be achieved under the influence of hyaluronidase (HAase) enzyme. A fractional factorial experimental design was used to examine the factors [molar concentrations of adipic acid dihydrazide (X1) and 1-ethyl-3-[3-dimethylaminopropyl] carbodiimide hydrochloride (X2), volume of acetone (X3) and reaction time (X4)] influencing the responses, Y1; particle mean diameter: PMD (nanometers: nm), Y2; polydispersity index: PDI and Y3; zeta (ζ) potential: (millivolts). The amide bond formation between HA and ADH after cross-linking was confirmed by FT-IR and (13)C-NMR analyses. These NPs were also characterized for cytotoxicity on a human vaginal epithelial cell line and L. crispatus. When formulated with factors X1; 2.49 mM, X2; 9.96 mM, X3; 60 mL, X4; 6 h, HA-NPs exhibited a spherical shape with PMD, PDI, ζ potential, encapsulation efficiency, and drug loading of 70.6 ± 4.1 nm, 0.07 ± 0.02, -38.2 ± 2.8 mV, 51.8 ± 2.4% w/w and 26.1 ± 1.2% w/w, respectively, (n = 3). Unlike for HA based gel, HAase significantly triggered the drug release and HA degradation from the NPs after 24 h (~90% w/w and 65% w/w, respectively); whereas, in its absence, these values were ~39% w/w and 26% w/w, respectively. The NPs were non-cytotoxic to human vaginal VK2/E6E7, End1/E6E7 cells and Lactobacillus crispatus. These data highlight the potential of HAase-sensitive HA-NPs templates for the controlled and vaginal delivery of anti-HIV/AIDS microbicides.
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Affiliation(s)
- Vivek Agrahari
- Laboratory of Future Nanomedicines and Theoretical Chronopharmaceutics, Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri-Kansas City, 2464 Charlotte Street, Kansas City, Missouri, 64108, USA
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Lee J, Boerrigter SXM, Jung YW, Byun Y, Yuk SH, Byrn SR, Lee EH. Organic vapor sorption method of isostructural solvates and polymorph of tenofovir disoproxil fumarate. Eur J Pharm Sci 2013; 50:253-62. [DOI: 10.1016/j.ejps.2013.07.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2013] [Revised: 06/26/2013] [Accepted: 07/09/2013] [Indexed: 11/26/2022]
Affiliation(s)
- Jangmi Lee
- College of Pharmacy, Korea University, 2511 Sejong-ro, Sejong 339-700, Republic of Korea
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Zhang T, Zhang C, Agrahari V, Murowchick JB, Oyler NA, Youan BBC. Spray drying tenofovir loaded mucoadhesive and pH-sensitive microspheres intended for HIV prevention. Antiviral Res 2012; 97:334-46. [PMID: 23274788 DOI: 10.1016/j.antiviral.2012.12.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 12/13/2012] [Accepted: 12/18/2012] [Indexed: 12/31/2022]
Abstract
PURPOSE To develop spray dried mucoadhesive and pH-sensitive microspheres (MS) based on polymethacrylate salt intended for vaginal delivery of tenofovir (a model HIV microbicide) and assess their critical biological responses. METHODS The formulation variables and process parameters are screened and optimized using a 2(4-1) fractional factorial design. The MS are characterized for size, zeta potential, yield, encapsulation efficiency, Carr's index, drug loading, in vitro release, cytotoxicity, inflammatory responses and mucoadhesion. RESULTS The optimal MS formulation has an average size of 4.73μm, zeta potential of -26.3mV, 68.9% yield, encapsulation efficiency of 88.7%, Carr's index of 28.3 and drug loading of 2% (w/w). The MS formulation release 91.7% of its payload in the presence of simulated human semen. At a concentration of 1mg/ml, the MS are noncytotoxic to vaginal endocervical/epithelial cells and Lactobacillus crispatus when compared to control media. There is also no statistically significant level of inflammatory cytokine (IL1-α, IL-1β, IL-6, IL-8, and IP-10) release triggered by these MS. Their percent mucoadhesion is 2-fold higher than that of 1% HEC gel formulation. CONCLUSION These data suggest the promise of using such MS as an alternative controlled microbicide delivery template by intravaginal route for HIV prevention.
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Affiliation(s)
- Tao Zhang
- Laboratory of Future Nanomedicines and Theoretical Chronopharmaceutics, Division of Pharmaceutical Science, University of Missouri-Kansas City, Kansas City, MO 64108, USA
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Cholorpheniramine tannate complexes: Physicochemical, chemometric, and taste masking evaluation. Int J Pharm 2012; 436:582-92. [DOI: 10.1016/j.ijpharm.2012.07.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 07/02/2012] [Accepted: 07/22/2012] [Indexed: 11/30/2022]
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Agrahari V, Youan BBC. Sensitive and rapid HPLC quantification of tenofovir from hyaluronic acid-based nanomedicine. AAPS PharmSciTech 2012; 13:202-10. [PMID: 22215290 DOI: 10.1208/s12249-011-9735-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Accepted: 11/21/2011] [Indexed: 11/30/2022] Open
Abstract
The purpose of this study was to develop and validate a rapid, sensitive, and specific reversed-phase high-performance liquid chromatography method for the quantitative determination of native tenofovir (TNF) for various applications. Different analytical performance parameters such as linearity, precision, accuracy, limit of quantification (LOQ), limit of detection (LOD), and robustness were determined according to International Conference on Harmonization (ICH) guidelines. A Bridge™ C18 column (150 × 4.6 mm, 5 μm) was used as stationary phase. The retention time of TNF was 1.54 ± 0.03 min (n = 6). The assay was linear over the concentration range of 0.1-10 μg/mL. The proposed method was sensitive with LOD and LOQ values equal to 50 and 100 ng/mL, respectively. The method was accurate with percent mean recovery from 95.41% to 102.90% and precise as percent RSD (relative standard deviation) values for intra-day, and inter-day precision were less than 2%. This method was utilized for the estimation of molar absorptivity of TNF at 259 nm (ε(259) = 12,518 L/mol/cm), calculated from linear regression analysis. The method was applied for determination of percentage of encapsulation efficiency (22.93 ± 0.04%), drug loading (12.25 ± 1.03%), in vitro drug release profile in the presence of enzyme (43% release in the first 3 h) and purification analysis of hyaluronic acid-based nanomedicine.
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Wang L, Sassi AB, Patton D, Isaacs C, Moncla BJ, Gupta P, Rohan LC. Development of a liposome microbicide formulation for vaginal delivery of octylglycerol for HIV prevention. Drug Dev Ind Pharm 2011; 38:995-1007. [PMID: 22149387 DOI: 10.3109/03639045.2011.637048] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The feasibility of using a liposome drug delivery system to formulate octylglycerol (OG) as a vaginal microbicide product was explored. A liposome formulation was developed containing 1% OG and phosphatidyl choline in a ratio that demonstrated in vitro activity against Neisseria gonorrhoeae, HSV-1, HSV-2 and HIV-1 while sparing the innate vaginal flora, Lactobacillus. Two conventional gel formulations were prepared for comparison. The OG liposome formulation with the appropriate OG/lipid ratio and dosing level had greater efficacy than either conventional gel formulation and maintained this efficacy for at least 2 months. No toxicity was observed for the liposome formulation in ex vivo testing in a human ectocervical tissue model or in vivo testing in the macaque safety model. Furthermore, minimal toxicity was observed to lactobacilli in vitro or in vivo safety testing. The OG liposome formulation offers a promising microbicide product with efficacy against HSV, HIV and N. gonorrhoeae.
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Affiliation(s)
- Lin Wang
- Magee Womens Research Institute, Pittsburgh, PA, USA
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Product and process understanding of a novel pediatric anti-HIV tenofovir niosomes with a high-pressure homogenizer. Eur J Pharm Sci 2011; 44:93-102. [PMID: 21726640 DOI: 10.1016/j.ejps.2011.06.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Revised: 06/17/2011] [Accepted: 06/20/2011] [Indexed: 11/20/2022]
Abstract
A variety of factors were systemically evaluated in order to establish the characteristics of the niosomes obtained with a high-pressure homogenizer. The vesicular sizing parameters, electrical properties, drug entrapment data and drug release characteristics were investigated using two groups of factors. The first group presented the physical process variables such as pressure of the homogenizer and the times that the samples were processed (cycles). The second group encompassed the compositional variables such as the drug loading, surfactant chain length, cholesterol level and the level of the charge imparting agent. The obtained data showed that the drug distributed within both the aqueous and lipid phases of the formed niosomes. Saturation-like behaviors for both the effect of homogenization cycles on the produced size and the effect of the pressure on the size homogeneity were recorded. In contrast to the drug entrapment and conductivity of the niosomal suspension, the vesicular size parameters as well as the zeta potential were inversely proportional with the homogenization parameters. Drug release was significantly affected by the compositional factors rather than the physical ones. The current study demonstrated the usefulness of the microfluidization for the production and further scale-up of anti-HIV niosomes with very small mean vesicular sizes.
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On NH, Chen F, Hinton M, Miller DW. Assessment of P-glycoprotein Activity in the Blood-Brain Barrier (BBB) Using Near Infrared Fluorescence (NIRF) Imaging Techniques. Pharm Res 2011; 28:2505-15. [DOI: 10.1007/s11095-011-0478-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Accepted: 05/10/2011] [Indexed: 01/08/2023]
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