1
|
Chaudhari RK, Shah PA, Shrivastav PS. Green synthesis of silver nanoparticles using Adhatoda vasica leaf extract and its application in photocatalytic degradation of dyes. Discov Nano 2023; 18:135. [PMID: 37903994 PMCID: PMC10616034 DOI: 10.1186/s11671-023-03914-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 10/25/2023] [Indexed: 11/01/2023]
Abstract
The paper describes biogenic synthesis of silver nanoparticles (AgNPs) using Adhatoda vasica leaf extracts at room temperature. The prepared AgNPs were characterized by UV-visible spectroscopy, Fourier-transform infrared spectroscopy, powder X-ray diffraction, Energy dispersive X-ray (EDX), High Resolution Transmission Electron Microscope, Scanning Electron Microscopy and Thermogravimetric analyser. The bio reduction method is devoid of any toxic chemicals, organic solvents, and external reducing, capping and stabilizing agent. The synthesized AgNPs had spherical shape with particle size ranging between 3.88 and 23.97 nm and had face centered cubic structure. UV-visible spectral analysis confirmed the formation of AgNPs with a characteristic surface plasmon resonance band at 419 nm. The EDX pattern revealed the presence of elemental Ag in AgNPs. The prepared AgNPs were used for degradation of Amaranth, Allura red and Fast green in aqueous medium, with ≥ 92.6% efficiency within 15 min using 5 mg of AgNPs. The optical bandgap, Eg value of 2.26 eV for AgNPs was found to be effective for rapid photocatalytic degradation of all the three dyes. The degradation process was observed to follow pseudo first order kinetics.
Collapse
Affiliation(s)
- Ronak Kumar Chaudhari
- Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad, Gujarat, 380009, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad, Gujarat, 380009, India
- Department of Forensic Sciences, National Forensic Sciences University, Dharwad, Karnataka, 580011, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad, Gujarat, 380009, India.
| |
Collapse
|
2
|
Shah PA, Shrivastav PS, Sharma VS, Chavda V. Uncovering the green frontier: harnessing deep eutectic solvents for sustainable bioanalysis. Bioanalysis 2023; 15:815-821. [PMID: 37551894 DOI: 10.4155/bio-2023-0088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023] Open
Affiliation(s)
- Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, Gujarat, 380009, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, Gujarat, 380009, India
| | - Vinay S Sharma
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, Gujarat, 380009, India
| | - Vishwajit Chavda
- Applied Chemistry Department, Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda, Vadodara, 390002, India
| |
Collapse
|
3
|
Sharma V, Vishwakarma VK, Shrivastav PS, Ammathnadu Sudhakar A, Sharma AS, Shah PA. Calixarene Functionalized Supramolecular Liquid Crystals and Their Diverse Applications. ACS Omega 2022; 7:45752-45796. [PMID: 36570265 PMCID: PMC9774433 DOI: 10.1021/acsomega.2c04699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 11/15/2022] [Indexed: 06/17/2023]
Abstract
Liquid crystals are considered to be the fourth state of matter with an intermediate order and fluidity in comparison to solids and liquids. Calixarenes are among one of the most versatile families of building blocks for supramolecular chemistry due to their unique vaselike structure that can be chemically engineered to have different shapes and sizes. During the last few decades, calixarenes have drawn much attention in the field of supramolecular chemistry due to their diverse applications in the fields of ion and molecular recognition, ion-selective electrodes for catalysis, drug delivery, gelation, organic electronics and sensors, etc. Imbuing liquid crystallinity to the calixarene framework leads to functionalized calixarene derivatives with fluidity and order. Columnar self-assembly of such derivatives in particular enhance the charge migration along the column due to the 1D stacking due to the enhanced π-π overlap. Considering limited reports and reviews on this new class of calixarene based liquid crystals, a comprehensive account of the synthesis of calixarene liquid crystals along with their mesomorphic behavior and potential applications are presented in this review.
Collapse
Affiliation(s)
- Vinay
S. Sharma
- Department
of Chemistry, School of Science, Gujarat
University, Navrangpura, Ahmedabad 380009, Gujarat India
| | | | - Pranav S. Shrivastav
- Department
of Chemistry, School of Science, Gujarat
University, Navrangpura, Ahmedabad 380009, Gujarat India
| | - Achalkumar Ammathnadu Sudhakar
- Department
of Chemistry, Indian Institute of Technology, Guwahati 781039, Assam India
- Centre
for Sustainable Polymers, Indian Institute
of Technology, Guwahati 781039, Assam India
| | - Anuj S. Sharma
- Department
of Chemistry, School of Science, Gujarat
University, Navrangpura, Ahmedabad 380009, Gujarat India
| | - Priyanka A. Shah
- Department
of Chemistry, School of Science, Gujarat
University, Navrangpura, Ahmedabad 380009, Gujarat India
| |
Collapse
|
4
|
Shah PA, Shrivastav PS, Sharma VS. Supercritical fluid chromatography for the analysis of antihypertensive Drugs: A short review. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
5
|
Shah PA, Sharma VS, Vanol PG, Sanyal M, Shrivastav PS. Hybrid SPE to overcome interference due to phospholipids for determination of neratinib in human plasma using UPLC-MS/MS. Biomed Chromatogr 2022; 36:e5416. [PMID: 35624555 DOI: 10.1002/bmc.5416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/22/2022] [Accepted: 05/25/2022] [Indexed: 11/05/2022]
Abstract
A reliable and robust bioanalytical method is developed to quantify neratinib, a tyrosine kinase inhibitor in human plasma using ultraperformance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The extraction of neratinib and its deuterated internal standard, neratinib-d6 was successfully performed on hybrid solid phase extraction (SPE) ultra-cartridges to remove the interference of phospholipids and proteins. Chromatographic analysis was done on UPLC BEH C18 (50 × 2.1 mm, 1.7 μm) column using 0.1% formic acid and acetonitrile under gradient conditions. The total analysis time was 1.5 min. The quantification of neratinib was achieved using electrospray ionization source operated in the positive ion multiple reaction monitoring mode. The mass transitions of neratinib and neratinib were m/z 557.3/112.1 and m/z 563.1/118.2, respectively. The linear concentration range for neratinib was 0.5-500 ng/mL, which adequately covers concentration levels expected in real subject samples. The assay was extensively validated for various validation parameters following standard guidelines for a bioanalytical assay. The intra- and inter-batch precision was ≤ 4.6 % and neratinib was found to be stable under various stability conditions. The mean IS-normalized matrix factor and recovery was 0.997 and 95.4 %, respectively. The validated method was successfully applied to a pharmacokinetic study in healthy subjects with different doses.
Collapse
Affiliation(s)
- Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | - Vinay S Sharma
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | - Pravin G Vanol
- Department of Chemistry, St. Xavier's College, Navrangpura, Ahmedabad, India
| | - Mallika Sanyal
- Department of Chemistry, St. Xavier's College, Navrangpura, Ahmedabad, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| |
Collapse
|
6
|
Sharma VS, Shah PA, Sharma AS, Subba Rao Ganga V, Shrivastav PS, Prajapat V. Upper/lower rim functionalized calixarene based AIE-active liquid crystals with self-assembly behavior: Photophysical and electrochemical studies. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
7
|
Pandya PA, Shah PA, Shrivastav PS. Simultaneous enantioseparation and simulation studies of atenolol, metoprolol and propranolol on Chiralpak® IG column using supercritical fluid chromatography. J Pharm Anal 2022; 11:746-756. [PMID: 35028180 PMCID: PMC8740114 DOI: 10.1016/j.jpha.2020.12.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 12/13/2020] [Accepted: 12/15/2020] [Indexed: 12/11/2022] Open
Abstract
Enantioseparation of three β-blockers, i.e., atenolol, metoprolol and propranolol, was studied on amylose tris(3-chloro-5-methylphenylcarbamate) immobilized chiral stationary phase using supercritical fluid chromatography (SFC). The effect of organic modifiers (methanol, isopropanol and their mixture), column temperature and back pressure on chiral separation of β-blockers was evaluated. Optimum chromatographic separation with respect to resolution, retention, and analysis time was achieved using a mixture of CO2 and 0.1% isopropyl amine in isopropanol: methanol (50:50, V/V), in 75:25 (V/V) ratio. Under the optimized conditions, the resolution factors (Rs) and separation factors (α) were greater than 3.0 and 1.5, respectively. Further, with increase in temperature (25–45 °C) and pressure (100–150 bars) there was corresponding decrease in retention factors (k), α and Rs. However, a reverse trend (α and Rs) was observed for atenolol with increase in temperature. The thermodynamic data from van't Hoff plots revealed that the enantioseparation was enthalpy driven for metoprolol and propranolol while entropy driven for atenolol. To understand the mechanism of chiral recognition and the elution behavior of the enantiomers, molecular docking studies were performed. The binding energies obtained from simulation studies were in good agreement with the elution order found experimentally and also with the free energy values. The method was validated in the concentration range of 0.5–10 μg/mL for all the enantiomers. The limit of detection and limit of quantitation ranged from 0.126 to 0.137 μg/mL and 0.376–0.414 μg/mL, respectively. The method was used successfully to analyze these drugs in pharmaceutical preparations. Simultaneous enantioseparation of three β-blockers in a single analysis using chiral SFC Separation efficiency was mainly dependent on the nature and composition of mobile phase van't Hoff plots revealed enthalpy driven process for metoprolol and propranolol and entropy driven for atenolol Binding energies from molecular docking study were in good agreement with the elution order The results suggested hydrogen bonding and hydrophobic interactions, as the dominant interaction modes.
Collapse
Affiliation(s)
- Pranav A Pandya
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| |
Collapse
|
8
|
Sharma VS, Sharma AS, Ganga VSR, Shrivastav PS, Shah PA, Agarwal N. Room-temperature blue-light-emitting liquid crystalline materials based on phenanthroimidazole-substituted carbazole derivatives. NEW J CHEM 2021. [DOI: 10.1039/d1nj04234c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report disc-shaped materials with the A–Π–D molecular architecture based on the phenanthroimidazole-linked carbazole group as blue-light-emitting materials with room-temperature liquid crystalline properties.
Collapse
Affiliation(s)
- Vinay S. Sharma
- Department of Chemistry, School of Science, Gujarat University, Ahmedabad, Gujarat, India
| | - Anuj S. Sharma
- Department of Chemistry, School of Science, Gujarat University, Ahmedabad, Gujarat, India
| | - Venkata Subba Rao Ganga
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Science, Gujarat University, Ahmedabad, Gujarat, India
| | - Priyanka A. Shah
- Department of Chemistry, School of Science, Gujarat University, Ahmedabad, Gujarat, India
| | - Nikhil Agarwal
- Department of Chemistry, Faculty of Basic and Applied Science, Madhav University, Sirohi, Rajasthan, India
| |
Collapse
|
9
|
Pandya PA, Shah PA, Shrivastav PS. Application of supercritical fluid chromatography for separation and quantitation of 15 co-formulated binary anti-hypertensive medications using a single elution protocol. Biomed Chromatogr 2020; 35:e5035. [PMID: 33226650 DOI: 10.1002/bmc.5035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 11/17/2020] [Accepted: 11/20/2020] [Indexed: 11/05/2022]
Abstract
A facile supercritical fluid chromatography method is proposed to analyse 15 co-formulated binary anti-hypertensive drug combinations using a customized elution procedure. The effect of mobile phase composition, column back pressure and temperature was suitably optimized for adequate retention, analyte response and resolution. The chromatographic separation of the different drug combinations was performed on a DCPak poly(4-vinylpyridine) column (250 × 4.6 mm, 5 μm) at 125-bar pressure and 40°C using a photodiode array detector. A linear gradient of CO2 and 0.1% formic acid in methanol provided the best elution conditions for all drug combinations. Baseline separation of the drugs was possible with resolution factor Rs ranging from 1.42 to 12.58. The method was validated for specificity, sensitivity, accuracy and precision, recovery and robustness. The limit of detection and limit of quantitation for aliskiren, amlodipine, atenolol, candesartan, hydrochlorothiazide, lisinopril, losartan, metoprolol, olmesartan, telmisartan and valsartan were in the range of 0.26-2.56 and 0.77-7.75 μg/mL, respectively. The thermodynamic study revealed that interactions of the drugs with the stationary phase were spontaneous as evident from the negative free energy values, and the separation process was enthalpy driven. The developed method was successfully employed to analyse these drugs in their co-formulated tablet formulations.
Collapse
Affiliation(s)
- Pranav A Pandya
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| |
Collapse
|
10
|
Banker AM, Muchhadia RP, Desai BB, Shah PA. Long-Term Results of a Modified Removable Expansion Plate to Increase Arch Length: A Series of 10 Cases. J Indian Orthod Soc 2020. [DOI: 10.1177/0301574220939493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Crowding, protrusion, and class II or end-on occlusion are malocclusions frequently associated with a narrow transverse dimension. The goal of expansion is to reduce the need for extractions in permanent dentition through elimination of arch length discrepancies as well as correction of bony base imbalances. Gaining arch length makes the subsequent fixed appliance treatment easier and shorter. Palatal expansion is usually achieved by using fixed rapid maxillary expansion, but because of the complexity, cost, and increased laboratory steps, this step is sometimes omitted. We have modified the design and screw activation protocol of the removable Schwarz plate in such a way that it gives efficient and stable expansion as well as arch perimeter gain with simpler mechanics. We present the long-term results of 10 such cases treated with this modified expander followed by fixed appliances.
Collapse
Affiliation(s)
- Alka M. Banker
- Department of Orthodontics, Goenka Research Institute of Dental Science, Pethapur, Gandhinagar, Gujarat, India
| | - Rahul P. Muchhadia
- Department of Orthodontics, Goenka Research Institute of Dental Science, Pethapur, Gandhinagar, Gujarat, India
| | | | | |
Collapse
|
11
|
Pandya PA, Shah PA, Shrivastav PS. Separation of achiral anti-diabetic drugs using sub/supercritical fluid chromatography with a polysaccharide stationary phase: Thermodynamic considerations and molecular docking study. J Pharm Biomed Anal 2020; 189:113452. [DOI: 10.1016/j.jpba.2020.113452] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/24/2020] [Accepted: 06/27/2020] [Indexed: 02/08/2023]
|
12
|
Pandya PA, Shah PA, Shrivastav PS. Analytical separation of four stereoisomers of luliconazole using supercritical fluid chromatography: Thermodynamic aspects and simulation study with chiral stationary phase. J Chromatogr A 2020; 1625:461299. [DOI: 10.1016/j.chroma.2020.461299] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/30/2020] [Accepted: 05/31/2020] [Indexed: 11/16/2022]
|
13
|
Bharwad KD, Shah PA, Shrivastav PS, Sharma VS. Selective quantification of lacosamide in human plasma using UPLC-MS/MS: Application to pharmacokinetic study in healthy subjects with different doses. Biomed Chromatogr 2020; 34:e4928. [PMID: 32567713 DOI: 10.1002/bmc.4928] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/11/2020] [Accepted: 06/18/2020] [Indexed: 11/05/2022]
Abstract
A practical, sensitive, and robust UPLC-MS/MS method was developed and validated to quantify lacosamide in human plasma. A simple one-step protein precipitation was used to extract lacosamide and labeled lacosamide-13C, D3 as an internal standard (IS) from 150-μL plasma. The extracts were analyzed on an Eclipse Plus C18 column (50 × 2.1 mm, 1.8 μm) using 0.1% formic acid in water and methanol:acetonitrile (50:50, v/v) under gradient conditions. The extracts were quantified on LCMS-8040 using electrospray ionization source operated in positive ionization and multiple reaction monitoring modes. The method showed good linearity from 0.02 to 20 μg/mL, which was adequate to cover lacosamide concentration assayed in formulations with different strengths. The bioanalytical assay was fully validated as per current regulatory guidelines. The intra-batch and inter-batch precision values of lacosamide were less than 4.6%. Lacosamide was found to be stable at different storage conditions. The extraction recoveries and IS-normalized matrix factors for lacosamide ranged from 97.17 to 99.68% and from 0.973 to 1.012, respectively. The validated method was successfully applied to a pharmacokinetic study with three lacosamide formulations (50, 100, and 200 mg) in 36 healthy subjects. The assay reliability was determined by reanalysis of 81 subject samples.
Collapse
Affiliation(s)
- Kirtikumar D Bharwad
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | - Vinay S Sharma
- Department of Chemistry, Faculty of Basic and Applied Science, Madhav University, Sirohi, Rajasthan, India
| |
Collapse
|
14
|
Sharma VS, Sharma AS, Worthington SJB, Shah PA, Shrivastav PS. Columnar self-assembly, electrochemical and luminescence properties of basket-shaped liquid crystalline derivatives of Schiff-base-moulded p-tert-butyl-calix[4]arene. NEW J CHEM 2020. [DOI: 10.1039/d0nj04148c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of blue-light emitting supramolecular basket-shaped liquid crystalline compounds based on p-tert-butyl-calix[4]arene core to form self-assembly and columnar hexagonal phase.
Collapse
Affiliation(s)
- Vinay S. Sharma
- Department of Chemistry
- Faculty of Basic and Applied Science
- Madhav University
- Sirohi
- India
| | - Anuj S. Sharma
- Department of Chemistry
- School of Science
- Gujarat University
- Ahmedabad
- India
| | | | - Priyanka A. Shah
- Department of Chemistry
- School of Science
- Gujarat University
- Ahmedabad
- India
| | | |
Collapse
|
15
|
Trivedi V, Shah PA, Shrivastav PS, Sanyal M. Optimization of chromatography to overcome matrix effect for reliable estimation of four small molecular drugs from biological fluids using LC-MS/MS. Biomed Chromatogr 2019; 34:e4777. [PMID: 31826316 DOI: 10.1002/bmc.4777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 12/04/2019] [Accepted: 12/06/2019] [Indexed: 11/07/2022]
Abstract
The article describes a systematic study to overcome the matrix effect during chromatographic analysis of gemfibrozil, rivastigmine, telmisartan and tacrolimus from biological fluids using LC-ESI-MS/MS. All four methods were thoroughly developed by the appropriate choice of analytical column, elution mode and pH of mobile phase for improved chromatography and overall method performance. Matrix effect was assessed by post-column analyte infusion, slope of calibration line approach and post-extraction spiking. The best chromatographic conditions established were: Acquity BEH C18 (50 × 2.1 mm, 1.7 μm) column with 5.0 mm ammonium acetate, pH 6.0-methanol as the mobile phase under gradient program for gemfibrozil; Luna CN (50 × 2.0 mm, 3 μm) column with a mobile phase consisting of acetonitrile-10 mm ammonium acetate, pH 7.0 (90:10, v/v) for rivastigmine; Inertsustain C18 (100 × 2.0 mm, 5 μm) column using methanol-2.0 mm ammonium formate, pH 5.5 (80: 20, v/v) as the mobile phase for isocratic elution of telmisartan; and Acquity BEH C18 (50 × 2.1 mm, 1.7 μm) with methanol-10 mm ammonium acetate, pH 6.0 (95:5, v/v) as mobile phase for tacrolimus. The methods were thoroughly validated as per European Medicines Agency and US Food and Drug Administration guidance and were successfully applied for pharmacokinetic studies in healthy subjects.
Collapse
Affiliation(s)
- Vikas Trivedi
- Chemistry Department, Kadi Sarva Vishwavidyalaya, Gandhinagar, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad, India
| | - Mallika Sanyal
- Chemistry Department, St. Xavier's College, Navrangpura, Ahmedabad, India
| |
Collapse
|
16
|
Bharwad KD, Shah PA, Shrivastav PS, Sharma VS, Singhal P. Quantification of fenoprofen in human plasma using
UHPLC
–tandem mass spectrometry for pharmacokinetic study in healthy subjects. Biomed Chromatogr 2019; 34:e4708. [DOI: 10.1002/bmc.4708] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/01/2019] [Accepted: 09/19/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Kirtikumar D. Bharwad
- Department of Chemistry, School of SciencesGujarat University Ahmedabad Gujarat India
| | - Priyanka A. Shah
- Department of Chemistry, School of SciencesGujarat University Ahmedabad Gujarat India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of SciencesGujarat University Ahmedabad Gujarat India
| | - Vinay S. Sharma
- Department of Chemistry, Faculty of Basic and Applied ScienceMadhav University Sirohi Rajasthan India
| | - Puran Singhal
- Bioanalytical DepartmentAlkem Laboratories Ltd., Lower Parel Mumbai Maharashtra India
| |
Collapse
|
17
|
Shah PA, Shrivastav PS, Sharma V, Yadav MS. Challenges in simultaneous extraction and chromatographic separation of metformin and three SGLT-2 inhibitors in human plasma using LC–MS/MS. J Pharm Biomed Anal 2019; 175:112790. [DOI: 10.1016/j.jpba.2019.112790] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/20/2019] [Accepted: 07/23/2019] [Indexed: 12/12/2022]
|
18
|
Sharma VS, Sharma AS, Shah AP, Shah PA, Shrivastav PS, Athar M. New Class of Supramolecular Bowl-Shaped Columnar Mesogens Derived from Thiacalix[4]arene Exhibiting Gelation and Organic Light-Emitting Diodes Applications. ACS Omega 2019; 4:15862-15872. [PMID: 31592456 PMCID: PMC6776968 DOI: 10.1021/acsomega.9b01776] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 09/09/2019] [Indexed: 06/10/2023]
Abstract
A new class of blue light-emitting bowl-shaped mesogens with the thiacalix[4]arene core appended with 1,3,4-thiadiazole derivatives having peripheral alkoxy side chains have been synthesized and well characterized. The liquid crystalline behavior of present synthesized derivatives was examined by optical polarizing microscopy, differential scanning calorimetry, and X-ray diffraction studies. It was observed that these thiacalix[4]arene derivatives were capable of stabilizing the observed Colh phase with a higher temperature range. The cone-shaped thiacalix[4]arene-based liquid crystals with peripheral alkoxy side chains able to pack into the columns with enriched intermolecular interactions and thermal behavior. All derivatives showed blue luminescence in solution, solid thin-film, and gelation state. The hexagonal columnar phase and emissive nature of thiadiazole-based thiacalixarene compounds having xerogel behavior make them favorable in the application of emissive electronic display devices. The electrochemical properties of these thiacalixarene-based compounds demonstrate the effect of alkyl side chain on the highest occupied molecular orbital-lowest unoccupied molecular orbital energy levels and also exhibited lower electron band gaps. The electroluminescence behavior of the compound 10c was examined as emissive layers in the fabrication of organic light-emitting diodes.
Collapse
Affiliation(s)
- Vinay S. Sharma
- Department
of Chemistry, Faculty of Basic and Applied Sciences, Madhav University, Abu
Road, Sirohi 307026, Rajasthan, India
| | - Anuj S. Sharma
- Department
of Chemistry, School of Science, Gujarat
University, Ahmedabad 380009, Gujarat, India
| | - Akshara P. Shah
- Department
of Chemistry, Mumbai University, Santacruz, Mumbai 400
098, India
| | - Priyanka A. Shah
- Department
of Chemistry, School of Science, Gujarat
University, Ahmedabad 380009, Gujarat, India
| | - Pranav S. Shrivastav
- Department
of Chemistry, School of Science, Gujarat
University, Ahmedabad 380009, Gujarat, India
| | - Mohd Athar
- Department
of Chemistry, Central University of Gujarat, Ghandhinagar 382030, India
| |
Collapse
|
19
|
Bhadoriya A, Shah PA, Shrivastav PS, Sanyal M, Yadav MS. A high-throughput LC-MS/MS method for determination of flunarizine in human plasma: Pharmacokinetic study with different doses. Biomed Chromatogr 2019; 33:e4582. [PMID: 31077435 DOI: 10.1002/bmc.4582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/28/2019] [Accepted: 05/07/2019] [Indexed: 11/09/2022]
Abstract
A high-throughput and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method has been developed and validated for the determination of flunarizine in human plasma. Liquid-liquid extraction under acidic conditions was used to extract flunarizine and flunarizine-d8 from 100 μL human plasma. The mean extraction recovery obtained for flunarizine was 98.85% without compromising the sensitivity of the method. The chromatographic separation was performed on Hypersil Gold C18 (50 × 2.1 mm, 3 μm) column using methanol-10 mm ammonium formate, pH 3.0 (90:10, v/v) as the mobile phase. A tandem mass spectrometer (API-5500) equipped with an electrospray ionization source in the positive ion mode was used for detection of flunarizine. Multiple reaction monitoring was selected for quantitation using the transitions, m/z 405.2 → 203.2 for flunarizine and m/z 413.1 → 203.2 for flunarizine-d8. The validated concentration range was established from 0.10 to 100 ng/mL. The accuracy (96.1-103.1%), intra-batch and inter-batch precision (CV ≤ 5.2%) were satisfactory and the drug was stable in human plasma under all tested conditions. The method was used to evaluate the pharmacokinetics of 5 and 10 mg flunarizine tablet formulation in 24 healthy subjects. The pharmacokinetic parameters Cmax and AUC were dose-proportional.
Collapse
Affiliation(s)
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | - Mallika Sanyal
- Department of Chemistry, St Xavier's College, Navrangpura, Ahmedabad, India
| | - Manish S Yadav
- Scimagma Laboratories Ltd, Wagale Estate, Thane (W), Mumbai, India
| |
Collapse
|
20
|
Bhadoriya A, Shah PA, Shrivastav PS, Bharwad KD, Singhal P. Determination of terbinafine in human plasma using UPLC-MS/MS: Application to a bioequivalence study in healthy subjects. Biomed Chromatogr 2019; 33:e4543. [PMID: 30933360 DOI: 10.1002/bmc.4543] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 03/11/2019] [Accepted: 03/26/2019] [Indexed: 11/08/2022]
Abstract
A high-throughput and sensitive ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method has been developed for the determination of terbinafine in human plasma. The method employed liquid-liquid extraction of terbinafine and terbinafine-d7 (used as internal standard) from 100 μL human plasma with ethyl acetate-n-hexane (80:20, v/v) solvent mixture. Chromatography was performed on a BEH C18 (50 × 2.1 mm, 1.7 μm) column using acetonitrile-8.0 mm ammonium formate, pH 3.5 (85:15, v/v) under isocratic elution. For quantitative analysis, MS/MS ion transitions were monitored at m/z 292.2/141.1 and m/z 299.1/148.2 for terbinafine and terbinafine-d7, respectively, using electrospray ionization in the positive mode. The method was validated according to regulatory guidance for selectivity, sensitivity, linearity, recovery, matrix effect, stability, dilution reliability and ruggedness with acceptable accuracy and precision. The method shows good linearity over the tested concentration range from 1.00 to 2000 ng/mL (r2 ≥ 0.9984). The intra-batch and inter-batch precision (CV) was 1.8-3.2 and 2.1-4.5%, respectively. The method was successfully applied to a bioequivalence study with 250 mg terbinafine in 32 healthy subjects. The major advantage of this method includes higher sensitivity, small plasma volume for processing and a short analysis time.
Collapse
Affiliation(s)
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Kirtikumar D Bharwad
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Puran Singhal
- Bioanalytical Department, Alkem Laboratories Ltd., Lower Parel, Mumbai, 400013, India
| |
Collapse
|
21
|
|
22
|
Shah PA, Shrivastav PS, George A. Mixed-mode solid phase extraction combined with LC-MS/MS for determination of empagliflozin and linagliptin in human plasma. Microchem J 2019. [DOI: 10.1016/j.microc.2018.11.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
|
23
|
Bharwad KD, Shah PA, Shrivastav PS, Singhal P. Development and validation of a rapid and sensitive UPLC-MS/MS assay for the quantification of tofacitinib in human plasma. Biomed Chromatogr 2019; 33:e4458. [DOI: 10.1002/bmc.4458] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 11/21/2018] [Accepted: 11/29/2018] [Indexed: 01/10/2023]
Affiliation(s)
| | - Priyanka A. Shah
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| | - Puran Singhal
- Bioanalytical Department; Alkem Laboratories Ltd, Lower Parel; Mumbai India
| |
Collapse
|
24
|
Sharma VS, Singh HK, Sharma AS, Shah AP, Shah PA. Bowl-shaped fluorescent liquid crystals derived from 4-tert butyl calix[4]arene and trans cinnamic acid derivatives. NEW J CHEM 2019. [DOI: 10.1039/c9nj03097b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of bowl-shaped molecules with a calix[4]arene rigid core appended by four-side and two-side substitution with trans 4-n-alkoxy cinnamic acid has been synthesized and well characterized.
Collapse
Affiliation(s)
- Vinay S. Sharma
- Department of Chemistry
- Faculty of Basic and Applied Science
- Madhav University
- Sirohi
- India
| | - Hemant Kumar Singh
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Anuj S. Sharma
- Department of Chemistry, School of Science, Gujarat University
- Ahmedabad
- India
| | | | - Priyanka A. Shah
- Department of Chemistry, School of Science, Gujarat University
- Ahmedabad
- India
| |
Collapse
|
25
|
Shah PA, Shrivastav PS, Shah JV, George A. Simultaneous quantitation of metformin and dapagliflozin in human plasma by LC-MS/MS: Application to a pharmacokinetic study. Biomed Chromatogr 2018; 33:e4453. [DOI: 10.1002/bmc.4453] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/23/2018] [Accepted: 11/29/2018] [Indexed: 12/18/2022]
Affiliation(s)
- Priyanka A. Shah
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| | - Jaivik V. Shah
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| | - Archana George
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| |
Collapse
|
26
|
Shah PA, Shrivastav PS. Ion-pair solid phase extraction for the simultaneous separation and quantitation of metformin and canagliflozin in human plasma by LC-MS/MS. Microchem J 2018. [DOI: 10.1016/j.microc.2018.08.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
|
27
|
Pandya JJ, Sanyal M, Shah PA, Shrivastav PS. HPTLC-Densitometric Determination of Allopurinol and its Metabolite Oxypurinol in Human Plasma and Allopurinol in Tablet Dosage Form. ACTA ACUST UNITED AC 2018. [DOI: 10.1080/22297928.2018.1445556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Jui J. Pandya
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad-380009, Gujarat, India
| | - Mallika Sanyal
- Department of Chemistry, St. Xavier’s College, Navrangpura, Ahmedabad-380009, Gujarat, India
| | - Priyanka A. Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad-380009, Gujarat, India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad-380009, Gujarat, India
| |
Collapse
|
28
|
Bhadoriya A, Dasandi B, Parmar D, Shah PA, Shrivastav PS. Quantitation of tadalafil in human plasma using a sensitive and rapid LC-MS/MS method for a bioequivalence study. J Pharm Anal 2018; 8:271-276. [PMID: 30140492 PMCID: PMC6104147 DOI: 10.1016/j.jpha.2018.01.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 12/30/2017] [Accepted: 01/13/2018] [Indexed: 10/26/2022] Open
Abstract
A highly sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for the determination of tadalafil (TAD) in human plasma. TAD and its deuterated internal standard (IS), tadalafil-d3, were extracted from 200 µL plasma using Phenomenex Strata-X-C 33 µ extraction cartridges. Chromatographic analysis was carried out on Synergi™ Hydro-RP C18 (100 mm × 4.6 mm, 4 µm) column with a mobile phase consisting of methanol and 10 mM ammonium formate, pH 4.0 (90:10, v/v), delivered at a flow rate of 0.9 mL/min. Quantitation of the protonated analyte was done on a triple quadrupole mass spectrometer using multiple reaction monitoring via electrospray ionization. The precursor to product ions transitions monitored for TAD and TAD-d3 were m/z 390.3 → 268.2 and m/z 393.1 → 271.2, respectively. The calibration curve was linear over the concentration range of 0.50-500 ng/mL with correlation coefficient, r2 ≥ 0.9994. Acceptable intra-batch and inter-batch precision (≤ 3.7%) and accuracy (97.8% to 104.1%) were obtained at five concentration levels. The recovery of TAD from spiked plasma was highly precise and quantitative (98.95% to 100.61%). Further, the effect of endogenous matrix components was minimal. TAD was found to be stable under different storage conditions in human plasma and also in whole blood samples. The validated method was successfully used to determine TAD plasma concentration in a bioequivalence study with 20 mg TAD tablets in 24 healthy volunteers. Method performance was evaluated by reanalyzing 115 study samples.
Collapse
Affiliation(s)
- Abhaysingh Bhadoriya
- Bioanalytical Department, Synchron Research Services Pvt. Ltd., 5th Floor, the Chambers, Sarkhej-Gandhinagar Highway, Bodakdev, Ahmedabad 380054, India
| | - Bhavesh Dasandi
- Bioanalytical Department, Synchron Research Services Pvt. Ltd., 5th Floor, the Chambers, Sarkhej-Gandhinagar Highway, Bodakdev, Ahmedabad 380054, India
| | - Dharmesh Parmar
- Bioanalytical Department, Synchron Research Services Pvt. Ltd., 5th Floor, the Chambers, Sarkhej-Gandhinagar Highway, Bodakdev, Ahmedabad 380054, India
| | - Priyanka A. Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| |
Collapse
|
29
|
Bhadoriya A, Sanyal M, Shah PA, Shrivastav PS. Simultaneous quantitation of rosuvastatin and ezetimibe in human plasma by LC-MS/MS: Pharmacokinetic study of fixed-dose formulation and separate tablets. Biomed Chromatogr 2018; 32:e4291. [DOI: 10.1002/bmc.4291] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 04/21/2018] [Accepted: 05/10/2018] [Indexed: 01/15/2023]
Affiliation(s)
| | - Mallika Sanyal
- Department of Chemistry; St. Xavier's College; Ahmedabad India
| | - Priyanka A. Shah
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| |
Collapse
|
30
|
Vanol PG, Sanyal M, Shah PA, Shrivastav PS. Quantification of metronidazole in human plasma using a highly sensitive and rugged LC-MS/MS method for a bioequivalence study. Biomed Chromatogr 2018; 32:e4242. [DOI: 10.1002/bmc.4242] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 03/02/2018] [Accepted: 03/09/2018] [Indexed: 11/10/2022]
Affiliation(s)
| | - Mallika Sanyal
- Chemistry Department; St Xavier's College; Ahmedabad India
| | - Priyanka A. Shah
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| |
Collapse
|
31
|
Vanol PG, Sanyal M, Shah PA, Shrivastav PS. Quantification of metronidazole in healthy subjects' feces using an LC-MS/MS method. Biomed Chromatogr 2018; 32:e4265. [PMID: 29679499 DOI: 10.1002/bmc.4265] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 03/30/2018] [Accepted: 04/11/2018] [Indexed: 11/10/2022]
Abstract
A highly selective and sensitive liquid chromatography-tandem mass spectrometry (LC MS/MS) method was developed for the quantification of metronidazole (MTZ) in human feces. The analyte was recovered from feces after liquid-liquid extraction with ethyl acetate and separated on Waters Symmetry® C18 (100 × 4.6 mm, 5μm) column using 0.1% formic acid in water and acetonitrile (40:60, v/v) as the mobile phase. A stable-deuterated internal standard metronidazole-d4 (MTZ-d4) was used in the study. Mass analysis was performed on a triple quadrupole mass spectrometer in the positive electrospray ionization mode. A linear response function of MTZ was established in the concentration range of 0.50-250 ng/g, based on dry mass. The mean extraction recovery of MTZ (97.28%) and MTZ-d4 (96.76%) from spiked feces samples was consistent at higher as well as lower concentrations. Post-column infusion analysis showed no ion-suppression/enhancement effects and the mean IS-normalized matrix factor ranged from 0.986 to 1.013. Spiked feces samples stored at -20 and - 70°C for long-term stability were stable for at least 3 months, while extracted samples (dry and wet extracts) were stable up to 24 h. The method was applied to determine MTZ in feces of 12 healthy Indian subjects.
Collapse
Affiliation(s)
- Pravin G Vanol
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | - Mallika Sanyal
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, India
| | | | | |
Collapse
|
32
|
Shah JV, Parekh JM, Shah PA, Shah PV, Sanyal M, Shrivastav PS. Application of an LC-MS/MS method for the analysis of amlodipine, valsartan and hydrochlorothiazide in polypill for a bioequivalence study. J Pharm Anal 2018; 7:309-316. [PMID: 29404054 PMCID: PMC5790699 DOI: 10.1016/j.jpha.2017.06.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 04/16/2017] [Accepted: 06/02/2017] [Indexed: 12/02/2022] Open
Abstract
A sensitive and selective method has been proposed for the simultaneous determination of amlodipine (AML), valsartan (VAL) and hydrochlorothiazide (HCTZ) in human plasma by liquid chromatography–tandem mass spectrometry (LC–MS/MS). The analytes and their deuterated analogs were quantitatively extracted from 100 µL human plasma by solid phase extraction on Oasis HLB cartridges. The chromatographic separation of the analytes was achieved on a Chromolith RP18e (100 mm × 4.6 mm) analytical column within 2.5 min. The resolution factor between AML and VAL, AML and HCTZ, and VAL and HCTZ was 2.9, 1.5 and 1.4, respectively, under isocratic conditions. The method was validated over a dynamic concentration range of 0.02–20.0 ng/mL for AML, 5.00–10,000 ng/mL for VAL and 0.20–200 ng/mL for HCTZ. Ion-suppression/enhancement effects were investigated by post-column infusion technique. The mean IS-normalized matrix factors for AML, VAL and HCTZ were 0.992, 0.994 and 0.998, respectively. The intra-batch and inter-batch precision (% CV) across quality control levels was ≤ 5.56% and the recovery was in the range of 93.4%–99.6% for all the analytes. The method was successfully applied to a bioequivalence study of 5 mg AML + 160 mg VAL + 12.5 mg HCTZ tablet formulation (test and reference) in 18 healthy Indian males under fasting. The mean log-transformed ratios of Cmax, AUC0–120h and AUC0-inf and their 90% CIs were within 90.2%–102.1%. The assay reproducibility was demonstrated by reanalysis of 90 incurred samples.
Collapse
Affiliation(s)
- Jaivik V Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| | - Jignesh M Parekh
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| | - Priya V Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India.,Department of Chemistry, St. Xavier's College, Navrangpura, Ahmedabad 380009, India.,Department of Pharmacy, M. S. University, Pratapgunj, Vadodara 390002, India
| | - Mallika Sanyal
- Department of Chemistry, St. Xavier's College, Navrangpura, Ahmedabad 380009, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| |
Collapse
|
33
|
Shah PA, Parekh JM, Shrivastav PS. Assessment of critical extraction and chromatographic parameters for the determination of bupropion and its three primary metabolites in human plasma by LC-MS/MS. Microchem J 2017. [DOI: 10.1016/j.microc.2017.08.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
34
|
Vanol PG, Yadav M, Sanyal M, Shah PA, Shrivastav PS. Overcoming interference of plasma phospholipids using HybridSPE for the determination of trimetazidine by UPLC-MS/MS. Biomed Chromatogr 2017; 32. [DOI: 10.1002/bmc.4095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 09/03/2017] [Accepted: 09/07/2017] [Indexed: 11/09/2022]
Affiliation(s)
| | - Manish Yadav
- Chemistry Department, School of Sciences; KSKV Kachchh University; Bhuj India
| | - Mallika Sanyal
- Chemistry Department; St Xavier's College; Ahmedabad India
| | - Priyanka A. Shah
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| |
Collapse
|
35
|
Shah PA, Shrivastav PS. Determination of silodosin and its active glucuronide metabolite KMD-3213G in human plasma by LC-MS/MS for a bioequivalence study. Biomed Chromatogr 2017; 32. [DOI: 10.1002/bmc.4041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 06/16/2017] [Accepted: 06/27/2017] [Indexed: 12/15/2022]
Affiliation(s)
- Priyanka A. Shah
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad India
| |
Collapse
|
36
|
Contractor P, Gandhi A, Solanki G, Shah PA, Shrivastav PS. Determination of ergocalciferol in human plasma after Diels-Alder derivatization by LC-MS/MS and its application to a bioequivalence study. J Pharm Anal 2017; 7:417-422. [PMID: 29404069 PMCID: PMC5790750 DOI: 10.1016/j.jpha.2017.05.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 05/12/2017] [Accepted: 05/19/2017] [Indexed: 12/17/2022] Open
Abstract
An accurate, sensitive and selective method is developed for determination of ergocalciferol (vitamin D2) in human plasma using LC-MS/MS. After liquid-liquid extraction with n-hexane, ergocalciferol was derivatized by reacting with 4-phenyl-1,2,4-triazoline-3,5-dione (PTAD), a strong dienophile based on Diels-Alder reaction. Ergocalciferol and its deuterated internal standard, ergocalciferol-d6, were analyzed on X Select CSH C18 (100 mm×4.6 mm, 2.5 µm) column using acetonitrile and 0.1% (v/v) formic acid in water containing 0.14% methylamine within 6.0 min under gradient elution mode. Tandem mass spectrometry in positive ionization mode was used to quantify ergocalciferol by multiple reaction monitoring (MRM). Entire data processing was done using Watson LIMS™ software which provided excellent data integrity and high throughput with improved operational efficiency. The major advantage of this method includes higher sensitivity (0.10 ng/mL), superior extraction efficiency (≥83%) and small sample volume (100 µL) for processing. The method was linear in the concentration range of 0.10-100 ng/mL for ergocalciferol. The intra-batch and inter-batch accuracy and precision (% CV) values varied from 97.3% to 109.0% and 1.01% to 5.16%, respectively. The method was successfully applied to support a bioequivalence study of 1.25 mg ergocalciferol capsules in 12 healthy subjects.
Collapse
Affiliation(s)
- Pritesh Contractor
- Department of Chemistry, Kadi Sarva Vishwavidyalaya, Gandhinagar, Ahmedabad-382015, India
- Bioanalytical Department, Veeda Clinical Research, Ahmedabad-387810, India
| | - Abhishek Gandhi
- Bioanalytical Department, Veeda Clinical Research, Ahmedabad-387810, India
| | - Gajendra Solanki
- Bioanalytical Department, Veeda Clinical Research, Ahmedabad-387810, India
| | - Priyanka A. Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
- Corresponding author.
| |
Collapse
|
37
|
Shah JV, Shah PA, Sanyal M, Shrivastav PS. Simultaneous quantification of amiloride and hydrochlorothiazide in human plasma by liquid chromatography-tandem mass spectrometry. J Pharm Anal 2017; 7:288-296. [PMID: 29404051 PMCID: PMC5790693 DOI: 10.1016/j.jpha.2017.03.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Revised: 03/06/2017] [Accepted: 03/23/2017] [Indexed: 11/17/2022] Open
Abstract
A selective, sensitive and precise assay based on solid phase extraction and liquid chromatography–tandem mass spectrometry (LC–MS/MS) was developed for the simultaneous determination of amiloride (AMI) and hydrochlorothiazide (HCTZ) in human plasma. Sample clean-up with 250 µL of plasma was done on Phenomenex Strata™-X extraction cartridges using their labeled internal standards (AMI-15N3 and HCTZ-13C,d2). Chromatography was performed on Hypersil Gold C18 (50 mm×3.0 mm, 5 µm) column using acetonitrile with 4.0 mM ammonium formate (pH 4.0, adjusted with 0.1% formic acid) (80:20, v/v) as the mobile phase. Detection was carried out on a triple quadrupole API 5500 mass spectrometer utilizing an electrospray ionization interface and operating in the positive ionization mode for AMI and negative ionization mode for HCTZ. Multiple reaction monitoring was used following the transitions at m/z 230.6/116.0, m/z 233.6/116.0, m/z 296.0/204.9 and m/z 299.0/205.9 for AMI, AMI-15N3, HCTZ and HCTZ-13C,d2, respectively. Calibration curves were linear (r2≥0.9997) over the concentration range of 0.050–50.0 and 0.50–500 ng/mL for AMI and HCTZ, respectively, with acceptable accuracy and precision. The signal-to-noise ratio at the limit of quantitation was ≥14 for both the analytes. The mean recovery of AMI and HCTZ from plasma was 89.0% and 98.7%, respectively. The IS-normalized matrix factors determined for matrix effect ranged from 0.971 to 1.024 for both the analytes. The validated LC–MS/MS method was successfully applied to a bioequivalence study using 5 mg AMI and 50 mg HCTZ fixed dose tablet formulation in 18 healthy Indian volunteers with good reproducibility.
Collapse
Affiliation(s)
- Jaivik V Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| | - Mallika Sanyal
- Department of Chemistry, St. Xavier's College, Navrangpura, Ahmedabad 380009, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| |
Collapse
|
38
|
Shah PA, Shah JV, Sanyal M, Shrivastav PS. LC-MS/MS analysis of metformin, saxagliptin and 5-hydroxy saxagliptin in human plasma and its pharmacokinetic study with a fixed-dose formulation in healthy Indian subjects. Biomed Chromatogr 2016; 31. [PMID: 27508356 DOI: 10.1002/bmc.3809] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 07/28/2016] [Accepted: 08/08/2016] [Indexed: 01/29/2023]
Abstract
A specific and rapid liquid chromatography-tandem mass spectrometry method is proposed for the simultaneous determination of metformin (MET), saxagliptin (SAXA) and its active metabolite, 5-hydroxy saxagliptin (5-OH SAXA) in human plasma. Sample preparation was accomplished from 50 μL plasma sample by solid-phase extraction using sodium dodecyl sulfate as an ion-pair reagent. Reversed-phase chromatographic resolution of analytes was possible within 3.5 min on ACE 5CN (150 × 4.6 mm, 5 μm) column using acetonitrile and10.0 mm ammonium formate buffer, pH 5.0 (80:20, v/v) as the mobile phase. Triple quadrupole mass spectrometric detection was performed using electrospray ionization in the positive ionization mode. The calibration curves showed good linearity (r2 ≥ 0.9992) over the established concentration range with limit of quantification of 1.50, 0.10 and 0.20 ng/mL for MET, SAXA and 5-OH SAXA respectively. The extraction recoveries obtained from spiked plasma samples were highly consistent for MET (75.12-77.84%), SAXA (85.90-87.84%) and 5-OH SAXA (80.32-82.69%) across quality controls. The validated method was successfully applied to a bioequivalence study with a fixed-dose formulation consisting of 5 mg SAXA and 500 mg MET in 18 healthy subjects. The reproducibility of the assay was demonstrated by reanalysis of 87 incurred samples.
Collapse
Affiliation(s)
- Priyanka A Shah
- Department of Chemistry School of Sciences, Gujarat University, Ahmedabad, India
| | - Jaivik V Shah
- Department of Chemistry School of Sciences, Gujarat University, Ahmedabad, India
| | - Mallika Sanyal
- Department of Chemistry, St Xavier's College, Ahmedabad, India
| | - Pranav S Shrivastav
- Department of Chemistry School of Sciences, Gujarat University, Ahmedabad, India
| |
Collapse
|
39
|
Shah PA, Shah JV, Sanyal M, Shrivastav PS. LC-tandem mass spectrometry method for the simultaneous determination of metformin and sitagliptin in human plasma after ion-pair solid phase extraction. J Pharm Biomed Anal 2016; 131:64-70. [PMID: 27526402 DOI: 10.1016/j.jpba.2016.08.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Revised: 08/08/2016] [Accepted: 08/09/2016] [Indexed: 10/21/2022]
Abstract
A reversed-phase liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) method was established for simultaneous determination of two oral hypoglycemic drugs metformin (MET) and sitagliptin (STG) in human plasma. The analytes were extracted from 50μL human plasma by ion-pair solid phase extraction using sodium lauryl sulphate on Phenomenex Strata-X (30mg/1mL) cartridges. The chromatographic separation was accomplished on XSelect HSS CN (150×4.6mm, 5μm) column using mobile phase consisting of methanol-8.0mM ammonium formate in water, pH 4.5 (80:20, v/v) under isocratic condition. Tandem MS detection was performed on a triple quadrupole spectrometer equipped with an electrospray ionization source, operated in the positive mode. Multiple reaction monitoring (MRM) was used to quantify the analytes following transitions, m/z 130.1→60.1 and m/z 408.3→235.1 for MET and STG respectively. The method displayed acceptable linearity in the concentration range of 4.00-3200ng/mL for MET and 1.00-800ng/mL for STG. The intra-batch and inter-batch precisions were ≤5.1% and accuracy ranged from 96.5 to 103.3% for both the drugs. The mean recovery of MET and STG obtained from spiked plasma samples was 82.5% and 90.4% respectively with minimal matrix interference. Both the drugs were found to be stable under all mandatory storage conditions. The validated method was successfully applied to a clinical pharmacokinetic study for a fixed-dose tablet formulation containing 500mg MET and 50mg STG in 16 healthy volunteers.
Collapse
Affiliation(s)
- Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad- 380009, India
| | - Jaivik V Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad- 380009, India
| | - Mallika Sanyal
- Department of Chemistry, St. Xavier's College, Navrangpura, Ahmedabad- 380009, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad- 380009, India.
| |
Collapse
|
40
|
Vanol PG, Singhal P, Shah PA, Shah JV, Shrivastav PS, Sanyal M. SPE-UPLC-MS/MS assay for determination of letrozole in human plasma and its application to bioequivalence study in healthy postmenopausal Indian women. J Pharm Anal 2016; 6:276-281. [PMID: 29403993 PMCID: PMC5762604 DOI: 10.1016/j.jpha.2016.05.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/18/2016] [Accepted: 05/20/2016] [Indexed: 11/24/2022] Open
Abstract
A rapid and sensitive ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method is described for determination of letrozole in human plasma. Following solid phase extraction (SPE) of letrozole and letrozole-d4 on Orochem DVB-LP cartridges, chromatography was performed on Acquity UPLC BEH C18 (50 mm×2.1 mm, 1.7 µm) column using methanol-0.1% formic acid in water (85:15, v/v) as the mobile phase. Detection was carried out on a triple quadrupole mass spectrometer with an electrospray source, operated under positive ionization mode. Quantitation of letrozole and letrozole-d4 was done using multiple reaction monitoring (MRM) following the transitions at m/z 286.2→217.0 and m/z 290.2→221.0, respectively. The calibration plots were linear through the concentration range of 0.10-100 ng/mL (r2≥0.9990) using 100 µL human plasma. The extraction recovery of letrozole ranged from 94.3% to 96.2% and the intra-batch and inter-batch precision was ≤5.2%. The method was successfully applied to a bioequivalence study of letrozole after oral administration of 2.5 mg tablet formulation to 16 healthy postmenopausal Indian women. The assay reproducibility was also established through incurred sample reanalysis (ISR) of 74 subject samples.
Collapse
Affiliation(s)
- Pravin G Vanol
- Chemistry Department, St. Xavier's College, Navrangpura, Ahmedabad 380009, India
| | - Puran Singhal
- Bioanalytical Department, Alkem Laboratories Ltd., Lower Parel, Mumbai 400013, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| | - Jaivik V Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India
| | - Mallika Sanyal
- Chemistry Department, St. Xavier's College, Navrangpura, Ahmedabad 380009, India
| |
Collapse
|
41
|
Shah PA, Sharma P, Shah JV, Sanyal M, Shrivastav PS. An improved LC–MS/MS method for the simultaneous determination of pyrazinamide, pyrazinoic acid and 5-hydroxy pyrazinoic acid in human plasma for a pharmacokinetic study. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1017-1018:52-61. [DOI: 10.1016/j.jchromb.2016.02.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Revised: 02/22/2016] [Accepted: 02/24/2016] [Indexed: 11/24/2022]
|
42
|
Chaudhary DV, Patel DP, Shah JV, Shah PA, Sanyal M, Shrivastav PS. Application of a UPLC-MS/MS method for the analysis of alosetron in human plasma to support a bioequivalence study in healthy males and females. Biomed Chromatogr 2015; 29:1527-34. [DOI: 10.1002/bmc.3454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 01/20/2015] [Accepted: 01/30/2015] [Indexed: 12/17/2022]
Affiliation(s)
- Darshan V. Chaudhary
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad 380009 Gujarat India
| | - Daxesh P. Patel
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad 380009 Gujarat India
| | - Jaivik V. Shah
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad 380009 Gujarat India
| | - Priyanka A. Shah
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad 380009 Gujarat India
| | - Mallika Sanyal
- Department of Chemistry; St Xavier's College; Navrangpura Ahmedabad 380009 Gujarat India
| | - Pranav S. Shrivastav
- Department of Chemistry, School of Sciences; Gujarat University; Ahmedabad 380009 Gujarat India
| |
Collapse
|
43
|
Chaudhary DV, Patel DP, Shah PA, Shah JV, Sanyal M, Shrivastav PS. Determination of lercanidipine in human plasma by an improved UPLC-MS/MS method for a bioequivalence study. J Pharm Anal 2015; 6:87-94. [PMID: 29403967 PMCID: PMC5762449 DOI: 10.1016/j.jpha.2015.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 08/18/2015] [Accepted: 09/15/2015] [Indexed: 11/30/2022] Open
Abstract
An improved and reliable ultra-performance liquid chromatography/tandem mass spectrometry (UPLC-MS/MS) method has been developed and validated for the determination of lercanidipine in human plasma. Plasma samples with lercanidipine-d3 as an internal standard (IS) were prepared by solid phase extraction on Phenomenex Strata-X cartridges using 100 µL of human plasma. Chromatographic analysis was performed on UPLC BEH C18 (50 mm×2.1 mm, 1.7 µm) column under isocratic conditions. Linear calibration curves were obtained over a wide dynamic concentration range of 0.010-20.0 ng/mL. Matrix effect was assessed by post-column infusion, post-extraction spiking and standard-line slope methods. The mean extraction recovery was >94% for the analyte and IS. Inter-batch and intra-batch precision (% CV) across five quality controls was <5.8%. Bioequivalence study was performed with 36 healthy subjects after oral administration of 10 mg of lercanidipine and the assay reproducibility was evaluated by reanalysis of 133 incurred samples.
Collapse
Affiliation(s)
- Darshan V Chaudhary
- Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad, Gujarat 380009, India
| | - Daxesh P Patel
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Building 37, Room 3106, Bethesda, MD 20892, USA
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad, Gujarat 380009, India
| | - Jaivik V Shah
- Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad, Gujarat 380009, India
| | - Mallika Sanyal
- Department of Chemistry, St. Xavier's College, Navrangpura, Ahmedabad, Gujarat 380009, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad, Gujarat 380009, India
| |
Collapse
|
44
|
Gupta A, Guttikar S, Shah PA, Solanki G, Shrivastav PS, Sanyal M. Selective and rapid determination of raltegravir in human plasma by liquid chromatography-tandem mass spectrometry in the negative ionization mode. J Pharm Anal 2015; 5:101-109. [PMID: 29403921 PMCID: PMC5761471 DOI: 10.1016/j.jpha.2014.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Revised: 09/28/2014] [Accepted: 10/11/2014] [Indexed: 11/30/2022] Open
Abstract
A selective and rapid high-performance liquid chromatography-tandem mass spectrometry method was developed and validated for the quantification of raltegravir using raltegravir-d3 as an internal standard (IS). The analyte and IS were extracted with methylene chloride and n-hexane solvent mixture from 100 µL human plasma. The chromatographic separation was achieved on a Chromolith RP-18e endcapped C18 (100 mm×4.6 mm) column in a run time of 2.0 min. Quantitation was performed in the negative ionization mode using the transitions of m/z 443.1→316.1 for raltegravir and m/z 446.1→319.0 for IS. The linearity of the method was established in the concentration range of 2.0-6000 ng/mL. The mean extraction recovery for raltegravir and IS was 92.6% and 91.8%, respectively, and the IS-normalized matrix factors for raltegravir ranged from 0.992 to 0.999. The application of this method was demonstrated by a bioequivalence study on 18 healthy subjects.
Collapse
Affiliation(s)
- Ajay Gupta
- Chemistry Department, Kadi Sarva Vishwavidyalaya, Sarva Vidyalaya Campus, Sector 15/23, Gandhinagar 382015, Gujarat, India
| | - Swati Guttikar
- Bioanalytical Research Department, Veeda Clinical Research, Ambawadi, Ahmedabad 380015, Gujarat, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, Gujarat, India
| | - Gajendra Solanki
- Bioanalytical Research Department, Veeda Clinical Research, Ambawadi, Ahmedabad 380015, Gujarat, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, Gujarat, India
| | - Mallika Sanyal
- Chemistry Department, Kadi Sarva Vishwavidyalaya, Sarva Vidyalaya Campus, Sector 15/23, Gandhinagar 382015, Gujarat, India.,Department of Chemistry, St. Xavier׳s College, Navrangpura, Ahmedabad 380009, Gujarat, India
| |
Collapse
|
45
|
Sharma P, Shah PA, Sanyal M, Shrivastav PS. Challenges in optimizing sample preparation and LC-MS/MS conditions for the analysis of carglumic acid, an N-acetyl glutamate derivative in human plasma. Drug Test Anal 2015; 7:763-72. [PMID: 25677217 DOI: 10.1002/dta.1774] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 12/24/2014] [Accepted: 12/26/2014] [Indexed: 11/10/2022]
Abstract
This paper describes a systematic approach to overcoming challenges in developing a robust and selective liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for reliable and precise determination of carglumic acid in human plasma. Sample extraction was tested on several reversed-phase solid-phase extraction (SPE) sorbents with different chemistries, such as hydrophobic C18, hydrophilic-lipophilic balance, and mixed-mode cation and anion exchange. The best recovery under the optimized extraction conditions was obtained with Oasis MAX (30 mg, 1cc) mixed-mode anion exchange (~ 50%) cartridge, compared to other sorbents from 100 μL plasma sample. Complete analytical separation of carglumic acid and carglumic acid-13C5 15N as an internal standard (IS) from endogenous plasma components was achieved on ACE 5CN (150 × 4.6 mm, 5 µm) column under isocratic conditions using acetonitrile:methanol (50:50, v/v) - 0.1% acetic acid in water [80:20, v/v] as the mobile phase. The deprotonated precursor → product ion transitions for carglumic acid (189/146) and IS (195/152) were monitored in the negative ionization mode on a triple quadrupole mass spectrometer. The regression curves were linear over a concentration range of 6.00-6000 ng/mL (r(2) ≥ 0.9987). Matrix effect was evaluated in terms of IS-normalized matrix factors, which ranged from 0.95 to 1.01 across four quality control levels. Intra- and inter-batch accuracy and precision, and the stability of carglumic acid in spiked plasma samples were assessed under different conditions. The method was applied to assess the pharmacokinetics of 100 mg/kg body weight carglumic acid in a healthy Indian subject.
Collapse
Affiliation(s)
- Primal Sharma
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Mallika Sanyal
- Chemistry Department, St Xavier's College, Navrangpura, Ahmedabad, 380009, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| |
Collapse
|
46
|
Sohail MF, Shah PA, Tariq I, Saeed-ul-Hassan S, Amin U, Raza SA, Saeed T, Sultana M, Jawa NH. Development and In vitro Evaluation of Flurbiprofen Microcapsules Prepared by Modified Solvent Evaporation Technique. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i7.4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
47
|
Kaiser CL, Kamien AJ, Shah PA, Chapman BJ, Cotanche DA. 5-Ethynyl-2'-deoxyuridine labeling detects proliferating cells in the regenerating avian cochlea. Laryngoscope 2010; 119:1770-5. [PMID: 19554638 DOI: 10.1002/lary.20557] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVES/HYPOTHESIS The avian cochlea regenerates hair cells following aminoglycoside treatment through supporting cell proliferation. Immunocytochemical labeling of 5-bromo-2'-deoxyuridine (BrdU), a thymidine analog, is a popular nonradioactive marker for identifying cells in the DNA synthesis (S phase) of the cell cycle. However, it requires harsh treatments to denature double-stranded DNA for the antibody to bind BrdU. We explored a new method using 5-ethynyl-2'-deoxyuridine (EdU) as a thymidine analog and a nonantibody azide/alkyne reaction between EdU and the fluorescent probe. We propose that EdU is as effective as BrdU, but without the requirement for harsh denaturation or the use of antibodies for detection. STUDY DESIGN Two-week-old chicks received a single gentamicin injection followed by a single EdU injection 72 hours later. Cochleae were extracted 4-8 hours later, fixed, and processed for fluorescent detection of EdU. METHODS Cochleae were processed for detection of incorporated EdU using the Click-iT Imaging Kit (Invitrogen/Molecular Probes, Carlsbad, CA) and colabeled with Sox2, myosin VI, or myosin VIIa antibodies. Whole-mount cochlear preparations were examined with confocal microscopy. RESULTS Supporting cells incorporated EdU into their newly synthesized DNA during the 4-8 hours following the EdU injection and were readily detected with little background signal. The intensity and quantity of cells labeled were similar to or better than that seen for BrdU. CONCLUSIONS The EdU method is as effective as BrdU, without requiring harsh denaturation or secondary antibodies to identify proliferating cells. Thus, the nonantibody EdU system allows more flexibility by enabling colabeling with multiple antibodies to other cellular proteins involved in regeneration.
Collapse
Affiliation(s)
- Christina L Kaiser
- Laboratory for Cellular and Molecular Hearing Research, Department of Otolaryngology, Boston University School of Medicine, Boston, Massachusetts 02118, USA
| | | | | | | | | |
Collapse
|
48
|
|
49
|
Shah PA, Gatehouse AMR, Clark SJ, Pell JK. Wheat containing snowdrop lectin (GNA) does not affect infection of the cereal aphid Metopolophium dirhodum by the fungal natural enemyPandora neoaphidis. Transgenic Res 2005; 14:473-6. [PMID: 16201413 DOI: 10.1007/s11248-005-5877-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Studies were carried out to determine if susceptibility of the cereal aphid Metopolophium dirhodum to the fungus Pandora neoaphidis was affected by wheat expressing snowdrop lectin (GNA). Aphid infection did not differ significantly between the transgenic GNA and non-transformed lines (91 and 82%, respectively). Fecundity also did not differ between aphids on the two lines, and was ca. 18 nymphs adult(-1). Time to infection was ca. 5 days for M. dirhodum on both lines in two of three assays. Our results indicate that wheat expressing GNA would not compromise the efficacy of P. neoaphidis as a biocontrol agent.
Collapse
Affiliation(s)
- P A Shah
- Plant and Invertebrate Ecology Division, Rothamsted Research, Harpenden, Hertfordshire, UK.
| | | | | | | |
Collapse
|
50
|
Affiliation(s)
- P A Shah
- Plant and Invertebrate Ecology Division, Rothamsted Research, Harpenden, Herts. AL5 2JQ, UK.
| | | | | |
Collapse
|