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Lee KM, Gwon MR, Lee HW, Seong SJ, Yoon YR. The possibility of low isomerization of β-lapachone in the human body. Transl Clin Pharmacol 2021; 29:160-170. [PMID: 34621708 PMCID: PMC8492396 DOI: 10.12793/tcp.2021.29.e16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/16/2021] [Accepted: 09/22/2021] [Indexed: 11/19/2022] Open
Abstract
β-Lapachone has been reported to have anticancer and various other therapeutic effects, but is limited in clinical applications by its low bioavailability. pH-Dependent isomerization can be suggested as one plausible factor influencing its low bioavailability. Since it is known that β-lapachone is converted to its isomer, α-lapachone in hydrochloric acid (HCl) solution, isomerization in the human body may be driven by HCl in the gastric fluid. The purpose of this study was to evaluate the possibility of isomerization of β-lapachone in the human body. Chemical reactions were conducted using simulated gastric fluid (SGF, pH 1.2) and simulated intestinal fluid (SIF, pH 7.5) at 37°C. β-Lapachone was observed in SGF at 37°C for 1 hour and SIF for 3 hours. In addition, biofluid analysis was performed on plasma samples 1 hour and 4 hours, and on urine sample 12 hours after oral administration of 100 mg MB12066, a synthetic β-lapachone, in healthy adult male. All samples were analyzed using liquid chromatography-tandem mass spectrometry. Only β-lapachone peaks existed in the spectra obtained from SGF and SIF. No isomerization of β-lapachone was observed in the analysis of any of the human samples. In the current study, the possibility of pH-dependent isomerization of β-lapachone in the human body was not confirmed.
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Affiliation(s)
- Kyung Min Lee
- Department of Clinical Pharmacology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu 41944, Korea.,BK21 Plus KNU Bio-Medical Convergence Program for Creative Talent, Department of Molecular Medicine, School of Medicine, Kyungpook National University, Daegu 41944, Korea
| | - Mi-Ri Gwon
- Department of Clinical Pharmacology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu 41944, Korea.,Clinical Omics Institute, School of Medicine, Kyungpook National University, Daegu 41944, Korea
| | - Hae Won Lee
- Department of Clinical Pharmacology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu 41944, Korea
| | - Sook Jin Seong
- Department of Clinical Pharmacology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu 41944, Korea
| | - Young-Ran Yoon
- Department of Clinical Pharmacology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu 41944, Korea.,BK21 Plus KNU Bio-Medical Convergence Program for Creative Talent, Department of Molecular Medicine, School of Medicine, Kyungpook National University, Daegu 41944, Korea.,Clinical Omics Institute, School of Medicine, Kyungpook National University, Daegu 41944, Korea
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2
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Ryan RYM, Fernandez A, Wong Y, Miles JJ, Cock IE. The medicinal plant Tabebuia impetiginosa potently reduces pro-inflammatory cytokine responses in primary human lymphocytes. Sci Rep 2021; 11:5519. [PMID: 33750911 PMCID: PMC7970899 DOI: 10.1038/s41598-021-85211-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 11/20/2020] [Indexed: 11/09/2022] Open
Abstract
Bark from the Handroanthus impetiginosus (Mart. ex DC.) Mattos (Bignoniaceae) tree has long been used in traditional South American healing practises to treat inflammation. However, its anti-inflammatory activity has not been closely examined. Here we use chemical extraction, qualitative phytochemical examination, toxicity testing and quantitative examination of anti-inflammatory activity on human cells ex vivo. All extracts were found to be nontoxic. We found different extracts exhibited unique cytokine profiles with some extracts outperforming a positive control used in the clinic. These results verify the immunomodulatory activity of Handroanthus impetiginosus (Mart. ex DC.) Mattos (Bignoniaceae) tree bark-derived compounds. Collectively, combining a lack of toxicity and potency in human immune cells supports further fractionation and research.
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Affiliation(s)
- Rachael Y M Ryan
- Australian Institute of Tropical Health and Medicine (AITHM), James Cook University, Cairns, QLD, 4878, Australia.,Centre for Molecular Therapeutics, James Cook University, Cairns, 4878, Australia.,School of Environment and Science, Griffith University, Brisbane, QLD, 4111, Australia
| | - Alejandra Fernandez
- School of Environment and Science, Griffith University, Brisbane, QLD, 4111, Australia.,Environmental Futures Research Institute, Griffith University, Brisbane, QLD, 4111, Australia
| | - Yide Wong
- Australian Institute of Tropical Health and Medicine (AITHM), James Cook University, Cairns, QLD, 4878, Australia.,Centre for Molecular Therapeutics, James Cook University, Cairns, 4878, Australia.,Centre for Tropical Bioinformatics and Molecular Biology, James Cook University, Cairns, 4878, Australia
| | - John J Miles
- Australian Institute of Tropical Health and Medicine (AITHM), James Cook University, Cairns, QLD, 4878, Australia. .,Centre for Molecular Therapeutics, James Cook University, Cairns, 4878, Australia. .,Centre for Tropical Bioinformatics and Molecular Biology, James Cook University, Cairns, 4878, Australia.
| | - Ian E Cock
- School of Environment and Science, Griffith University, Brisbane, QLD, 4111, Australia. .,Environmental Futures Research Institute, Griffith University, Brisbane, QLD, 4111, Australia.
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3
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An improved method for the preparation of β-lapachone:2-hydroxypropyl-β-cyclodextrin inclusion complexes. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101777] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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4
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Putnam WC, Kallem RR, Subramaniyan I, Beg MS, Edpuganti V. Bioanalytical method development and validation of a liquid chromatography-tandem mass spectrometry method for determination of β-lapachone in human plasma. J Pharm Biomed Anal 2020; 188:113466. [PMID: 32668395 DOI: 10.1016/j.jpba.2020.113466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/26/2020] [Accepted: 07/05/2020] [Indexed: 10/23/2022]
Abstract
The purpose of this work was to develop and validate a rapid, sensitive and robust liquid chromatography tandem mass spectrometric method for the quantification of β-lapachone in human plasma and to use that method to analyze human clinical samples. Sample preparation for the developed method involved liquid-liquid extraction using ethyl acetate for extraction of β-lapachone and cryptotanshinone (internal standard) from human plasma. Chromatographic resolution was achieved on a Kinetex C18 column using a gradient elution and a chromatographic flow rate of 0.5 mL/min. The retention times of β-lapachone and cryptotanshinone were 1.98 and 2.28 min, respectively, and the method had a total run time of 4 min. Bioanalytical method validation was conducted in accordance with the United States Food and Drug Administration regulatory guidelines. The method was validated over 2 calibration ranges in order to support high- and low-dose clinical studies. Calibration curve-1 covered the range of 0.25-50 ng/mL and calibration curve-2 covered the range of 50-2000 ng/mL. The method was determined to be accurate (percent relative errors between -1.07 to 5.36 %), precise (percent relative standard deviations less than 7.4), and sensitive (LLOQ 0.25 ng/mL). β-lapachone was determined to be stable (% change from time = 0 between -11.6 and 12.6 %) across the autosampler, benchtop, freeze/thaw and long-term (63 days) stability studies. The validated bioanalytical method was employed to determine β-lapachone concentrations in human plasma samples from a clinical study.
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Affiliation(s)
- William C Putnam
- Department of Pharmacy Practice, Texas Tech University Health Sciences Center, Dallas, TX, 75235, United States; Department of Pharmaceutical Science, Texas Tech University Health Sciences Center, Dallas, TX, 75235, United States.
| | - Raja Reddy Kallem
- Department of Pharmacy Practice, Texas Tech University Health Sciences Center, Dallas, TX, 75235, United States; Clinical Pharmacology and Experimental Therapeutics Center, School of Pharmacy, Texas Tech University Health Sciences Center, Dallas, TX, 75235, United States
| | - Indhumathy Subramaniyan
- Department of Pharmacy Practice, Texas Tech University Health Sciences Center, Dallas, TX, 75235, United States; Clinical Pharmacology and Experimental Therapeutics Center, School of Pharmacy, Texas Tech University Health Sciences Center, Dallas, TX, 75235, United States
| | - M Shaalan Beg
- Department of Internal Medicine (Division of Hematology-Oncology), University of Texas Southwestern Medical Center, Dallas, TX, 75390, United States; Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, 75390, United States
| | - Vindhya Edpuganti
- Department of Pharmacy Practice, Texas Tech University Health Sciences Center, Dallas, TX, 75235, United States; Clinical Pharmacology and Experimental Therapeutics Center, School of Pharmacy, Texas Tech University Health Sciences Center, Dallas, TX, 75235, United States
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5
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Nicoletti CD, Faria AFM, de Sá Haddad Queiroz M, Dos Santos Galvão RM, Souza ALA, Futuro DO, Faria RX, Ferreira VF. Synthesis and biological evaluation of β-lapachone and nor-β-lapachone complexes with 2-hydroxypropyl-β-cyclodextrin as trypanocidal agents. J Bioenerg Biomembr 2020; 52:185-197. [PMID: 32198699 DOI: 10.1007/s10863-020-09826-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Accepted: 02/20/2020] [Indexed: 01/03/2023]
Abstract
We study βLAP and its derivative nor-β-Lapachone (NβL) complexes with 2-hydroxypropyl-β-cyclodextrin to increase the solubility and bioavailability. The formation of true inclusion complexes between βLAP or NβL in 2-HP-β-CD in solid solution was characterization by FT-IR, DSC, powder X-ray was and was confirmed by one- and two-dimensional 1H NMR experiments. Additionally, the biological activities of βLAP, NβL, ICβLAP, and ICNβL were investigated through trypanocidal assays with T. cruzi and cytotoxicity studies with mouse peritoneal macrophages. Originally, we tested these complexes against T. cruzi viability and observed higher biological activities and lower cytotoxicity when compared to βLAP and NβL. Thus, the complexation of βLAP and NβL with 2-HP-β-CD increases the drug solubility, in addition vectorization was observed, increasing the biological activity against epimastigotes and trypomastigotes T. cruzi forms. Reduced the toxicity of the compounds against mammalian cells. In addition, the selectivity indices higher of the inclusion complexes comparing to substance free and those of benznidazole.
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Affiliation(s)
- Caroline Deckmann Nicoletti
- Departamento de Tecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal Fluminense, Niterói, RJ, 24241-000, Brazil
| | - Ana Flávia Martins Faria
- Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Av. Brasil, n° 4365, Pavilhão Carlos Chagas, sala 208c, Manguinhos, Rio de Janeiro, RJ, 21045900, Brazil.,Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Marcella de Sá Haddad Queiroz
- Departamento de Tecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal Fluminense, Niterói, RJ, 24241-000, Brazil
| | - Raíssa Maria Dos Santos Galvão
- Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Av. Brasil, n° 4365, Pavilhão Carlos Chagas, sala 208c, Manguinhos, Rio de Janeiro, RJ, 21045900, Brazil.,Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | | | - Débora Omena Futuro
- Departamento de Tecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal Fluminense, Niterói, RJ, 24241-000, Brazil
| | - Robson Xavier Faria
- Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Av. Brasil, n° 4365, Pavilhão Carlos Chagas, sala 208c, Manguinhos, Rio de Janeiro, RJ, 21045900, Brazil. .,Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil.
| | - Vitor Francisco Ferreira
- Departamento de Tecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal Fluminense, Niterói, RJ, 24241-000, Brazil
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6
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Pires FQ, da Silva JKR, Sa-Barreto LL, Gratieri T, Gelfuso GM, Cunha-Filho M. Lipid nanoparticles as carriers of cyclodextrin inclusion complexes: A promising approach for cutaneous delivery of a volatile essential oil. Colloids Surf B Biointerfaces 2019; 182:110382. [DOI: 10.1016/j.colsurfb.2019.110382] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 06/25/2019] [Accepted: 07/19/2019] [Indexed: 01/30/2023]
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7
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Mechanically Robust Gastroretentive Drug-Delivery Systems Capable of Controlling Dissolution Behaviors of Coground β-Lapachone. Pharmaceutics 2019; 11:pharmaceutics11060271. [PMID: 31185692 PMCID: PMC6630442 DOI: 10.3390/pharmaceutics11060271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 05/27/2019] [Accepted: 06/03/2019] [Indexed: 02/07/2023] Open
Abstract
In this study, we aimed to design a highly swellable and mechanically robust matrix tablet (SMT) as a gastroretentive drug-delivery system (GRDDS) capable of improving the dissolution behavior of β-lapachone with low aqueous solubility. For the preparation of SMTs, the cogrinding technique and freeze–thaw method were used to disperse β-lapachone in SMTs in an amorphous state and to enhance the swelling and mechanical properties of SMTs, respectively. As a result, the crystallinity of coground β-lapachone incorporated in the SMTs was found to be considerably decreased; thereby, the dissolution rates of the drug in a simulated gastric fluid could be substantially increased. The SMTs of β-lapachone also demonstrated significantly enhanced swelling and mechanical properties compared to those of a marketed product. The reason for this might be because the physically crosslinked polymeric networks with a porous structure that were formed in SMTs through the freeze–thaw method. In addition, β-lapachone was gradually released from the SMTs in 6 h. Therefore, SMTs of β-lapachone developed in this study could be used as GRDDS with appropriate swelling and mechanical properties for improving the dissolution behavior of hydrophobic drugs such as β-lapachone.
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8
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Kim KH, Le TH, Oh HK, Heo B, Moon J, Shin S, Jeong SH. Protective microencapsulation of β-lapachone using porous glass membrane technique based on experimental optimisation. J Microencapsul 2017; 34:545-559. [PMID: 28805467 DOI: 10.1080/02652048.2017.1367850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Even though β-lapachone is a novel drug with pharmacological activity, it has limitations including instability under light conditions. The main purpose of the study was to enhance the stability of β-lapachone using the microencapsulation method. The Shirasu porous glass membrane was used to achieve uniform-sized microcapsules. The prepared microcapsules were evaluated to investigate how process parameters affect the encapsulation efficiency, photostability and particle size distribution. The experimental design was conducted to obtain optimal formulations. In addition, an operating space was drawn to identify the safer range of control factors. All control factors showed significant effects on the encapsulation efficiency and photostability. For example, when a large amount of polymers was used, encapsulation efficiency and photostability were improved. However, as the amount of polymers increased, large and polydisperse microcapsules were produced. The robust design method provided information to characterise significant factors, thereby allowing effective control of photostability and size of microcapsules.
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Affiliation(s)
- Ki Hyun Kim
- a College of Pharmacy , Dongguk University-Seoul , Gyeonggi , Republic of Korea
| | - Tuan-Ho Le
- b Department of Industrial and Management Systems Engineering , Dong-A University , Busan , Republic of Korea
| | - Hee Kyung Oh
- a College of Pharmacy , Dongguk University-Seoul , Gyeonggi , Republic of Korea
| | - Bora Heo
- a College of Pharmacy , Dongguk University-Seoul , Gyeonggi , Republic of Korea
| | - Jeonghyun Moon
- c Korea International School , Seongnam-si, Gyeonggi , Republic of Korea
| | - Sangmun Shin
- b Department of Industrial and Management Systems Engineering , Dong-A University , Busan , Republic of Korea
| | - Seong Hoon Jeong
- a College of Pharmacy , Dongguk University-Seoul , Gyeonggi , Republic of Korea
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9
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Kim KH, Park SH, Adhikary P, Cho JH, Kang NG, Jeong SH. Stability of β-Lapachone upon Exposure to Various Stress Conditions: Resultant Efficacy and Cytotoxicity. Chem Pharm Bull (Tokyo) 2016; 64:381-9. [DOI: 10.1248/cpb.c15-00706] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Ki Hyun Kim
- College of Pharmacy, Dongguk University-Seoul
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10
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Silva EO, Ruano-González A, Dos Santos RA, Sánchez-Maestre R, Furtado NAJC, Collado IG, Aleu J. Antifungal and Cytotoxic Assessment of Lapachol Derivatives Produced by Fungal Biotransformation. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601100128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In the screening for biological active compounds, the biotransformation processes catalyzed by filamentous fungi are useful because they can provide information about the possible appearance of toxic metabolites after oral administration and also generate new leads. In this paper, biotransformation of lapachol (1) by three fungal strains, Mucor circinelloides NRRL3631, Botrytis cinerea UCA992 and Botrytis cinerea 2100, has been investigated for the first time. Lapachol (1) was biotransformed into avicequinone-A (2) by M. circinelloides, 3′-hydroxylapachol (3) by B. cinerea, and into dehydro-α-lapachone (4) by both fungi. All these compounds were evaluated for their cytotoxic activities. The metabolite 2 displayed non-selective cytotoxicity against tumor and normal cell lines, 3 did not show cytotoxicity against the same cells, while 4 showed higher cytotoxicity against cancer cell lines than lapachol (1). The transformation of 1 into harmless and reactive metabolites evidences the importance of the evaluation of drug metabolism in the drug discovery process. Antifungal potential of lapachol (1) and its metabolites 2 and 4 against B. cinerea has also been evaluated. Dehydro-α-lapachone (4) has been shown to be less toxic to fungal growth than lapachol (1), which indicates a detoxification mechanism of the phytopathogen.
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Affiliation(s)
- Eliane O. Silva
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Antonio Ruano-González
- Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, Puerto Real, Cádiz 11510, Spain
| | - Raquel A. Dos Santos
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, Franca, São Paulo 14404-600, Brazil
| | - Rosario Sánchez-Maestre
- Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, Puerto Real, Cádiz 11510, Spain
| | - Niege A. J. C. Furtado
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Isidro G. Collado
- Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, Puerto Real, Cádiz 11510, Spain
| | - Josefina Aleu
- Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, Puerto Real, Cádiz 11510, Spain
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Cunha-Filho MSS, Martínez-Pacheco R, Landin M. Effect of storage conditions on the stability of β-lapachone in solid state and in solution. J Pharm Pharmacol 2013; 65:798-806. [DOI: 10.1111/jphp.12040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 01/06/2013] [Indexed: 12/11/2022]
Abstract
Abstract
Objectives
In this work, the effects of several technological factors on the stability of β-lapachone (βLAP) in solution and in the solid state were investigated.
Methods
The effects of relative humidity and light on the stability of βLAP in the solid state were studied. Samples were characterized by liquid chromatography, thermal analysis, X-ray powder diffraction and optical microscopy. In solution, the effects of light conditions and additives (cyclodextrins) were also evaluated. Molecular modelling was used to support the degradation mechanism involved. Additionally, the pH stability profile of βLAP was established.
Key findings
The synergism of relative humidity and light promoted degradation of βLAP in the solid state, with important consequences for the physical and chemical characteristics of the drug after storage. Random methyl-β-cyclodextrin was able to protect the drug against the hydrolytic process in darkness. However, it accelerated the drug decomposition by photolysis in light conditions. According to the pH stability profile, βLAP undergoes an alkaline hydrolysis, its maximum stability pH being over the range 2–4.
Conclusions
These studies provide useful information regarding the optimal storage conditions and formulations of βLAP.
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Affiliation(s)
- Marcílio S S Cunha-Filho
- Faculdade de Ciências da Saúde, Campus Universitário Darcy Ribeiro, Universidade de Brasília (UnB), Brasília, Brazil
| | - Ramón Martínez-Pacheco
- Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Campus Vida, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - Mariana Landin
- Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Campus Vida, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
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Cunha-Filho MSS, Alvarez-Lorenzo C, Martínez-Pacheco R, Landin M. Temperature-sensitive gels for intratumoral delivery of β-lapachone: effect of cyclodextrins and ethanol. ScientificWorldJournal 2012; 2012:126723. [PMID: 22629119 PMCID: PMC3349311 DOI: 10.1100/2012/126723] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 01/15/2012] [Indexed: 12/16/2022] Open
Abstract
This work evaluated the potential of Pluronics (varieties F127 and P123) in combination with solubilizing agents to be used as syringeable in situ gelling depots of intratumoral β-lapachone (βLAP). Pluronic dispersions prepared at various concentrations in the absence and the presence of ethanol and randomly methylated β-cyclodextrin (RMβCD) were characterized regarding their rheological properties, drug solubilization capacity, and in vitro release. Pluronic F127 (18-23%) formulations combined high ability to solubilize βLAP (enhancement solubility factor up to 50), adequate gel temperature range (over 25 °C), and gel strength at 37 °C enough to guarantee the permanence of the formulation in the administration site for a period of time. βLAP release rate was finely tuned by the concentration of the polymer and the addition of RMβCD (diffusion coefficient ranging between 9 and 69 μg · cm(-2)). The ethanol increases βLAP release rate but simultaneously led to weak gels. This paper shows that βLAP formulations involving temperature-reversible Pluronic gels may be suitable for intratumoral drug delivery purposes.
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Affiliation(s)
- Marcilio S S Cunha-Filho
- Faculdade de Ciências da Saúde, Universidade de Brasília, Campus Universitário Darcy Ribeiro, 70910-900 Brasília-DF, Brazil
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13
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Cunha-Filho MS, Martínez-Pacheco R, Landin M. Fast dissolving β-lapachone particles and tablets: an approach using surface adsorption technique. Drug Dev Ind Pharm 2011; 38:866-71. [DOI: 10.3109/03639045.2011.630396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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