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Gowda JI, Hanabaratti RM, Hipparagi SS. Development of manganese oxide nanoparticles based chemical sensor for sensitive determination of an antiviral drug valaciclovir. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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2
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Spectroscopic (FT-IR, FT-Raman, NMR) investigation on 2-[(2-amino-6-oxo-6,9-dihydro-3H-purin-9-yl)methoxy]ethyl(2S)-2-amino-3-methylbutanoate by Density Functional Theory. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.matpr.2019.05.276] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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Devarushi US, Shetti NP, Bukkitgar SD, Tuwar SM. Electrochemical Behavior of an Anti-Viral Drug Valacyclovir at Carbon Paste Electrode and Its Analytical Application. RUSS J ELECTROCHEM+ 2018. [DOI: 10.1134/s1023193518100026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Adhikari BR, Govindhan M, Schraft H, Chen A. Simultaneous and sensitive detection of acetaminophen and valacyclovir based on two dimensional graphene nanosheets. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.09.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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5
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Burgess A, Shah K, Hough O, Hynynen K. Focused ultrasound-mediated drug delivery through the blood-brain barrier. Expert Rev Neurother 2016; 15:477-91. [PMID: 25936845 DOI: 10.1586/14737175.2015.1028369] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Despite recent advances in blood-brain barrier (BBB) research, it remains a significant hurdle for the pharmaceutical treatment of brain diseases. Focused ultrasound (FUS) is one method to transiently increase permeability of the BBB to promote drug delivery to specific brain regions. An introduction to the BBB and a brief overview of the methods, which can be used to circumvent the BBB to promote drug delivery, is provided. In particular, we discuss the advantages and limitations of FUS technology and the efficacy of FUS-mediated drug delivery in models of disease. MRI for targeting and evaluating FUS treatments, combined with administration of microbubbles, allows for transient, reproducible BBB opening. The integration of a real-time acoustic feedback controller has improved treatment safety. Successful clinical translation of FUS has the potential to transform the treatment of brain disease worldwide without requiring the development of new pharmaceutical agents.
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Affiliation(s)
- Alison Burgess
- Physical Sciences, Sunnybrook Research Institute, 2075 Bayview Ave, S665, Toronto, ON M4N 3M5, Canada
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Saleh GA, Askal HF, Refaat IH, Naggar AH, Abdel-aal FA. Adsorptive square wave voltammetric determination of the antiviral drug valacyclovir on a novel sensor of copper microparticles–modified pencil graphite electrode. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2015.08.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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7
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Gogineni V, Schinazi RF, Hamann MT. Role of Marine Natural Products in the Genesis of Antiviral Agents. Chem Rev 2015; 115:9655-706. [PMID: 26317854 PMCID: PMC4883660 DOI: 10.1021/cr4006318] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Vedanjali Gogineni
- Department of Pharmacognosy, Pharmacology, Chemistry & Biochemistry, University of Mississippi, School of Pharmacy, University, Mississippi 38677, United States
| | - Raymond F. Schinazi
- Center for AIDS Research, Department of Pediatrics, Emory University/Veterans Affairs Medical Center, 1760 Haygood Drive NE, Atlanta, Georgia 30322, United States
| | - Mark T. Hamann
- Department of Pharmacognosy, Pharmacology, Chemistry & Biochemistry, University of Mississippi, School of Pharmacy, University, Mississippi 38677, United States
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Katakam P, Dey B, Hwisa NT, Assaleh FH, Chandu BR, Singla RK, Mitra A. An Experimental Design Approach for Impurity Profiling of Valacyclovir-Related Products by RP-HPLC. Sci Pharm 2015; 82:617-9. [PMID: 25853072 PMCID: PMC4318202 DOI: 10.3797/scipharm.1403-20] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 05/05/2014] [Indexed: 11/22/2022] Open
Abstract
Impurity profiling has become an important phase of pharmaceutical research where both spectroscopic and chromatographic methods find applications. The analytical methodology needs to be very sensitive, specific, and precise which will separate and determine the impurity of interest at the 0.1% level. Current research reports a validated RP-HPLC method to detect and separate valacyclovir-related impurities (Imp-E and Imp-G) using the Box-Behnken design approach of response surface methodology. A gradient mobile phase (buffer: acetonitrile as mobile phase A and acetonitrile: methanol as mobile phase B) was used. Linearity was found in the concentration range of 50–150 μg/mL. The mean recovery of impurities was 99.9% and 103.2%, respectively. The %RSD for the peak areas of Imp-E and Imp-G were 0.9 and 0.1, respectively. No blank interferences at the retention times of the impurities suggest the specificity of the method. The LOD values were 0.0024 μg/mL for Imp-E and 0.04 μg/mL for Imp-G and the LOQ values were obtained as 0.0082 μg/mL and 0.136 μg/mL, respectively, for the impurities. The S/N ratios in both cases were within the specification limits. Proper peak shapes and satisfactory resolution with good retention times suggested the suitability of the method for impurity profiling of valacyclovir-related drug substances.
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Affiliation(s)
| | - Baishakhi Dey
- School of Medical Science & Technology, IIT Kharaghpur, India
| | - Nagiat T Hwisa
- Faculty of Pharmacy, University of Zawia, Az Zawiyah, Libya
| | | | - Babu R Chandu
- Faculty of Pharmacy, University of Zawia, Az Zawiyah, Libya
| | - Rajeev K Singla
- Division of Biotechnology, Netaji Subhas Institute of Technology, New Delhi, India
| | - Analava Mitra
- School of Medical Science & Technology, IIT Kharaghpur, India
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Tarinc D, Golcu A. Electrochemical behavior of valacyclovir and its square wave and differential pulse voltammetric determination in pharmaceuticals and biological fluids. RUSS J ELECTROCHEM+ 2015. [DOI: 10.1134/s1023193515020135] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Ahn SA, Hyun MH. Liquid chromatographic resolution of amino acid esters of acyclovir including racemic valacyclovir on crown ether-based chiral stationary phases. Chirality 2015; 27:268-73. [PMID: 25626672 DOI: 10.1002/chir.22424] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 12/07/2014] [Accepted: 12/09/2014] [Indexed: 11/11/2022]
Abstract
Valacyclovir, a potential prodrug for the treatment of patients with herpes simplex and herpes zoster, and its analogs were resolved on two chiral stationary phases (CSPs) based on (3,3'-diphenyl-1,1'-binaphthyl)-20-crown-6 covalently bonded to silica gel. In order to find out an appropriate mobile phase condition, various mobile phases consisting of various organic modifiers in water containing various acidic modifiers were applied to the resolution of valacyclovir and its analogs. When 30% acetonitrile in water containing any of 0.05 M, 0.10 M, or 0.15 M perchloric acid was used as a mobile phase, valacyclovir and its analogs were resolved quite well on the two CSPs with the separation factors (α) in the range of 2.49 ~ 6.35 and resolutions (RS ) in the range of 2.95 ~ 12.21. Between the two CSPs, the CSP containing residual silanol protecting n-octyl groups on the silica surface was found to be better than the CSP containing residual silanol groups.
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Affiliation(s)
- Seong Ae Ahn
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan, Republic of Korea
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Derayea SM, Omar MA, Mostafa IM, Hammad MA. Enhancement of the sensitivity of valacyclovir and acyclovir for their spectrofluorimetric determination in human plasma. RSC Adv 2015. [DOI: 10.1039/c5ra11635j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two rapid, simple and highly sensitive spectrofluorimetric methods have been developed and validated for determination of valacyclovir hydrochloride (VAC) and acyclovir (ACV).
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Affiliation(s)
- Sayed M. Derayea
- Analytical Chemistry Department
- Faculty of Pharmacy
- Minia University
- Minia
- Egypt
| | - Mahmoud A. Omar
- Analytical Chemistry Department
- Faculty of Pharmacy
- Minia University
- Minia
- Egypt
| | - Islam M. Mostafa
- Analytical Chemistry Department
- Faculty of Pharmacy
- Minia University
- Minia
- Egypt
| | - Mohamed A. Hammad
- Analytical Chemistry Department
- Faculty of Pharmacy
- Minia University
- Minia
- Egypt
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Caglar S. Determination of valacyclovir hydrochloride in tablets and spiked plasma samples by spectrofluorimetry. JOURNAL OF ANALYTICAL CHEMISTRY 2014. [DOI: 10.1134/s1061934814040145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Derayea SM, Mostafa IM, Omar MA. Spectrofluorimetric and TLC-densitometric methods for a stability indicating assay of valacyclovir hydrochloride in the presence of its degradation product. RSC Adv 2014. [DOI: 10.1039/c4ra06677d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two stability-indicating methods were developed and validated for determination of valacyclovir HCl in the presence of its degradation product, acyclovir.
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Affiliation(s)
| | | | - Mahmoud A. Omar
- Anal. Chem. Dept
- Faculty of Pharmacy
- Minia University
- Minia, Egypt
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Konda RK, Chandu BR, Challa BR, Chandrasekhar KB. Development and validation of a sensitive LC-MS/MS method for determination of valacyclovir in human plasma: Application to a bioequivalence study. ACTA CHROMATOGR 2013. [DOI: 10.1556/achrom.25.2013.4.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Shah B, Lafleur T, Chen A. Carbon nanotube based electrochemical sensor for the sensitive detection of valacyclovir. Faraday Discuss 2013; 164:135-46. [DOI: 10.1039/c3fd00023k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sivaleela T, Nagaveni V, Prabhakar S, Vairamani M. Chiral discrimination of drugs by DNA tetranucleotides under electrospray ionisation conditions. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2011; 17:177-186. [PMID: 21719925 DOI: 10.1255/ejms.1116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The DNA tetranucleotides, extended versions of GCA at the 3'-end or 5'-end, were used as chiral selectors for the chiral discrimination of atenolol, DOPA, tamsulosin, valacyclovir and zolmitriptan. Chiral discrimination was achieved by investigating the collision-induced dissociation spectra of the [X+Y-2H](2-) ion generated by electrospraying a solution mixture of tetranucleotide (X) and R- or S-analyte drug (Y). The relative abundances of the precursor ion and the product ion, resulting from the loss of drug, were considered for measuring the degree of chiral discrimination. Among all the tetranucleotides studied, AGCA showed the highest chiral discrimination. The present study emphasised the position of an adenine base in the tetranucleotide in chiral discrimination. The suitability of the method for the measurement of optical purity was also demonstrated in the case of zolmitriptan.
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Affiliation(s)
- Tallagadda Sivaleela
- National Centre for Mass Spectrometry, Indian Institute of Chemical Technology, Hyderabad-500 607, India
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Sasanya J, Abd-Alla A, Parker A, Cannavan A. Analysis of the antiviral drugs acyclovir and valacyclovir-hydrochloride in tsetse flies (Glossina pallidipes) using LC–MSMS. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:2384-90. [DOI: 10.1016/j.jchromb.2010.07.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Revised: 05/18/2010] [Accepted: 07/17/2010] [Indexed: 10/19/2022]
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Yadav M, Upadhyay V, Singhal P, Goswami S, Shrivastav PS. Stability evaluation and sensitive determination of antiviral drug, valacyclovir and its metabolite acyclovir in human plasma by a rapid liquid chromatography–tandem mass spectrometry method. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:680-8. [DOI: 10.1016/j.jchromb.2009.01.042] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2008] [Revised: 12/28/2008] [Accepted: 01/23/2009] [Indexed: 11/26/2022]
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