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Zakkula A, Tripathy HK, Bestha RM, Vinod AB, Kiran V, Dittakavi S, Mullangi R. Validated HPLC-UV method for quantification of paxalisib, a pan PI3K and mTOR inhibitor in mouse plasma: Application to a pharmacokinetic study in mice. Biomed Chromatogr 2023; 37:e5587. [PMID: 36680551 DOI: 10.1002/bmc.5587] [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: 12/10/2022] [Revised: 01/10/2023] [Accepted: 01/18/2023] [Indexed: 01/22/2023]
Abstract
Paxalisib is a pan-PI3K and mTOR inhibitor, currently entering into Phase II clinical trials as a potential drug to treat glioblastoma patients. We report the development and validation of a high-performance liquid chromatography (HPLC) method for the quantitation of paxalisib in mouse plasma as per the US Food and Drug Administration regulatory guidelines. From the mouse plasma, paxalisib and the internal standard (IS; filgotinib) were extracted using ethyl acetate as an extraction solvent. The chromatographic separation of paxalisib and the IS was accomplished on a Symmetry C18 (250 × 4.6 mm, 5.0 μm) column maintained at 40°C using 10 mm ammonium formate and acetonitrile in gradient conditions at a 0.8 ml/min flow-rate. The injection volume was 20 μl. The elution was monitored using a photo-diode array detector set at λmax 280 nm. Paxalisib and the IS eluted at 6.5 and 5.9 min, respectively with a total run time of 10 min. The calibration curve was linear over the range of 111-4,989 ng/ml. Inter- and intraday precision and accuracy, stability studies, dilution integrity and incurred sample reanalysis were investigated and the results met the acceptance criteria. The validated HPLC method was extended to assess the pharmacokinetic parameters of paxalisib in mice.
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Affiliation(s)
- Ashok Zakkula
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Shamirpet, Hyderabad, India
| | | | - Rama Murthi Bestha
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Shamirpet, Hyderabad, India
| | - A B Vinod
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Shamirpet, Hyderabad, India
| | - Vinay Kiran
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Shamirpet, Hyderabad, India
| | - Sreekanth Dittakavi
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Shamirpet, Hyderabad, India
| | - Ramesh Mullangi
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Shamirpet, Hyderabad, India
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2
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Tripathy HK, Kiran V, Zakkula A, A B V, Bestha RM, Dittakavi S, Mullangi R. Validated LC-MS/MS method for the determination of copanlisib in mouse dried blood spots. Biomed Chromatogr 2023; 37:e5548. [PMID: 36385469 DOI: 10.1002/bmc.5548] [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: 09/14/2022] [Revised: 11/13/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022]
Abstract
Copanlisib is a dual PI3K-δ inhibitor, used in follicular lymphoma treatment. In this research, we report a validated LC-MS/MS method for quantifying copanlisib from a mouse dried blood spot (DBS). We validated the method in line with the guidelines of the US Food and Drug Administration. The liquid-liquid extraction technique was used to extract copanlisib from the DBS discs. We used an Atlantis dC18 column and isocratic mobile phase for the chromatographic separation of copanlisib and the internal standard (idelalisib). The flow was 0.90 ml/min. Under the optimized chromatographic conditions, the retentions of copanlisib and the internal standard were 0.98 and 0.93 min, respectively. Each injection total run time was 2.50 min. The MS/MS ion transitions monitored were m/z 481.31 → 128.00 and 416.10 → 176.10 for copanlisib and the internal standard (IS) idelalisib, respectively. We have used a broad calibration range (1.01-4,797 ng/ml) with a determination coefficient (r2 ) of 0.997. All of the evaluated parameters met the acceptance criteria. Hematocrit did not influence the DBS copanlisib concentrations. We have used the validated method to derive the intravenous pharmacokinetic parameters by quantifying copanlisib in mouse plasma.
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Affiliation(s)
| | - Vinay Kiran
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Hyderabad, India
| | - Ashok Zakkula
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Hyderabad, India
| | - Vinod A B
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Hyderabad, India
| | - Rama Murthy Bestha
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Hyderabad, India
| | - Sreekanth Dittakavi
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Hyderabad, India
| | - Ramesh Mullangi
- Drug Metabolism and Pharmacokinetics, Laxai Life Sciences Pvt. Ltd, Hyderabad, India
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Siddesh A, Sriram D, Zakkula A, Kumar R, Dittakavi S, Zainuddin M, Trivedi RK, Mullangi R. Validated HPLC-UV method for simultaneous quantification of phosphatidylinositol 3-kinase inhibitors, copanlisib, duvelisib and idelalisib, in rat plasma: Application to a pharmacokinetic study in rats. Biomed Chromatogr 2021; 35:e5015. [PMID: 33125719 DOI: 10.1002/bmc.5015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 08/20/2020] [Revised: 10/16/2020] [Accepted: 10/22/2020] [Indexed: 11/07/2022]
Abstract
Phosphatidylinositol 3-kinase (PI3K) inhibitors are a novel class of anticancer drugs that are approved to treat various malignancies. We report the development and validation of a HPLC method for the simultaneous quantitation of three PI3K inhibitors, namely copanlisib, duvelisib and idelalisib, in rat plasma as per the regulatory guidelines of the United States Food and Drug Administration. The method involves extraction of copanlisib, duvelisib and idelalisib along with an internal standard (IS; filgotinib) from rat plasma (100 μL) using a liquid-liquid extraction process. The chromatographic separation of the analytes was achieved using step-wise gradient elution on a Hypersil Gold C18 column. The UV detection wavelength was set at λmax = 280 nm. Copanlisib, duvelisib, idelalisib and the IS eluted at 7.16, 12.6, 11.9 and 9.86 min, respectively, with a total run time of 15 min. The calibration curve ranged from 50 to 5000 ng/mL for all the analytes. Inter- and intra-day precision and accuracy, stability studies, dilution integrity and incurred sample reanalysis were investigated for all three analytes, and the results met the acceptance criteria. The validated HPLC method was successfully applied to a pharmacokinetic study in rats.
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Affiliation(s)
- Anup Siddesh
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
| | - Dhurvu Sriram
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
| | - Ashok Zakkula
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
| | - Rajnish Kumar
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
| | | | - Mohd Zainuddin
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
| | - Ravi Kumar Trivedi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
| | - Ramesh Mullangi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
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Tripathy HK, Manju NSV, Dittakavi S, Zakkula A, Mullangi R. DBS Assay with LC-MS/MS for the Determination of Idelalisib, A Selective PI3K-δ Inhibitor in Mice Blood and Its Application to a Pharmacokinetic Study. Drug Res (Stuttg) 2020; 71:36-42. [PMID: 32992346 DOI: 10.1055/a-1252-2476] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Idelalisib is a selective and second-generation PI3K-δ inhibitor, approved for the treatment of non-Hodgkin lymphoma and chronic lymphocytic leukemia. In this paper, we present a fully validated dried blood spot (DBS) method for the quantitation of idelalisib from mice blood using an LC-MS/MS, which was operated under multiple reaction monitoring mode. To the punched DBS discs, acidified methanol enriched with internal standard (IS; larotrectinib) was added and extracted using tert-butyl methyl ether as an extraction solvent with sonication. Chromatographic separation of idelalisib and the IS was achieved on an Atlantis dC18 column using a mixture of 10 mM ammonium formate:acetonitrile (25:75, v/v). The flow-rate and injection volume were 0.80 mL/min and 2.0 µL, respectively. Idelalisib and the IS were eluted at ~0.98 and 0.93 min, respectively and the total run time was 2.00 min. Idelalisib and the IS were analyzed using positive ion scan mode and parent-daughter mass to charge ion (m/z) transition of 416.1→176.1 and 429.1→342.1, respectively was used for the quantitation. The calibration range was 1.01-4 797 ng/mL. No matrix effect and carry over were observed. Haematocrit did not influence DBS idelalisib concentrations. All the validation parameters met the acceptance criteria. The applicability of the validated method was shown in a mice pharmacokinetic study.
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Affiliation(s)
| | - Nair S V Manju
- Karnataka College of Pharmacy, Thirumenahalli, Bangalore
| | - Sreekanth Dittakavi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore
| | - Ashok Zakkula
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore
| | - Ramesh Mullangi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore
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Zakkula A, Pulipati S, Dittakavi S, Bestha RM, Zainuddin M, Trivedi RK, Mullangi R. Development and Validation of an HPLC Method for Quantification of Filgotinib, a Novel JAK-1 Inhibitor in Mice Plasma: Application to a Pharmacokinetic Study. Drug Res (Stuttg) 2020; 70:233-238. [PMID: 32289835 DOI: 10.1055/a-1141-3475] [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: 10/24/2022]
Abstract
Filgotinib is a selective JAK1 (Janus kinase) inhibitor, filed in Japan for the treatment of rheumatoid arthritis. In this paper, we present the data of development and validation of a high-performance liquid chromatography (HPLC) method for the quantitation of filgotinib in mice plasma as per the FDA regulatory guideline. The method involves the extraction of filgotinib along with internal standard (IS, tofacitinib) from mice plasma (100 µL) using ethyl acetate as an extraction solvent. The chromatographic analysis was performed using an isocratic mobile phase comprising 10 mM ammonium acetate (pH 4.5) and acetonitrile (70:30, v/v) at a flow-rate of 0.8 mL/min on a Hypersil Gold C18 column. The UV detection wavelength was set at λmax 300 nm. Filgotinib and the IS eluted at 5.56 and 4.28 min, respectively with a total run time of 10 min. The calibration curve was linear over a concentration range of 0.05 to 5.00 μg/mL (r 2+=≥0.992). The intra- and inter-day precision and accuracy results were within the acceptable limits. Results of stability studies indicated that filgotinib was stable on bench-top, in auto-sampler, up to three freeze/thaw cycles and long-term storage at -80°C. The validated HPLC method was successfully applied to a pharmacokinetic study in mice.
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Affiliation(s)
- Ashok Zakkula
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Shobha Pulipati
- Department of Pharmacology, Raghavendra Institute of Pharmaceutical Education and Research, Anantapur, A.P, India
| | - Sreekanth Dittakavi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Ram Murthi Bestha
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Mohd Zainuddin
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Ravi Kumar Trivedi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Ramesh Mullangi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
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Zakkula A, Kurakula PK, Dittakavi S, Daram P, Bestha RM, Zainuddin M, Trivedi RK, Mullangi R. Validated HPLC method for quantification of copanlisib in mice plasma: application to a pharmacokinetic study. ADMET DMPK 2020; 8:113-121. [PMID: 35299776 PMCID: PMC8915597 DOI: 10.5599/admet.782] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 02/18/2020] [Indexed: 12/02/2022] Open
Abstract
Copanlisib is a pan phosphatidylinositol 3-kinase (PI3K) inhibitor approved for follicular lymphoma. In this paper, we present the data of development and validation of a high-performance liquid chromatography (HPLC) method for the quantitation of copanlisib in mice plasma as per the FDA regulatory guideline. The method involves the extraction of copanlisib along with internal standard (IS, enasidenib) from mice plasma (100 μL) using ethyl acetate as an extraction solvent. The chromatographic resolution of copanlisib and the IS was achieved on a Hypersil Gold C18 column maintained at 40 °C using a binary gradient mobile phase [10 mM ammonium formate (pH 4.0) and acetonitrile]. The flow-rate was 0.8 mL/min. For the detection of copanlisib and the IS, the photo-diode array detector was set at λmax 310 nm. Copanlisib and the IS eluted at 6.60 and 7.80 min, respectively with a total run time of 10 min. The calibration curve was linear over a concentration range of 50 to 5000 ng/mL for copanlisib (r2≥ 0.998). The results of intra- and inter-day accuracy and precision studies were within the acceptable limits. Copanlisib was stable on bench-top, in auto-sampler, up to three freeze/thaw cycle and long-term storage at -80 °C. The application of the validated method was shown in a mice pharmacokinetic study.
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Affiliation(s)
- Ashok Zakkula
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore-560 022, India
| | - Pavan Kumar Kurakula
- Department of Pharmacology, Raghavendra Institute of Pharmaceutical Education and Research, Anantapur-515721, A.P, India
| | - Sreekanth Dittakavi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore-560 022, India
| | - Prasanthi Daram
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore-560 022, India
| | - Ram Murthi Bestha
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore-560 022, India
| | - Mohd Zainuddin
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore-560 022, India
| | - Ravi Kumar Trivedi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore-560 022, India
| | - Ramesh Mullangi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore-560 022, India
- *Corresponding Author: E-mail: ; Tel.: +91-80-66628339
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Zakkula A, Gabani BB, Jairam RK, Kiran V, Todmal U, Mullangi R. Preparation and optimization of nilotinib self-micro-emulsifying drug delivery systems to enhance oral bioavailability. Drug Dev Ind Pharm 2020; 46:498-504. [PMID: 32067499 DOI: 10.1080/03639045.2020.1730398] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Objective: The objective of the current research was to prepare self-micro-emulsifying drug delivery systems (SMEDDS) for BCS class II drug, nilotinib to enhance its oral bioavailability.Methodology: Different types of excipients like oil, surfactant, and co-surfactant were evaluated for drug solubility. Among the screened excipients, Capryol 90, Transcutol HP, and Tween 80 were selected as oil, co-surfactant, and surfactant, respectively, to construct a ternary phase diagram to identify a homogenous mixture. Characterization performed for the prepared SMEDDS for its particle size/droplet size, emulsification time, phase separation, droplet morphology, in vitro drug release, and oral bioavailability.Results: Prepared SMEDDS showed the highest of 87% drug release in in vitro drug release experiment. SMEDDS drug release was superior over suspension formulation, which could be attributed to oil/surfactant ratios and particle size of the SMEDDS. The acquired pharmacokinetic parameters indicate that twofold increase in systemic exposure of SMEDDS compared with nilotinib suspension formulation. A similar twofold increase in relative oral bioavailability was also observed when compared SMEDDS formulation with suspension formulation. Delayed Tmax (time to reach peak plasma concentrations) was observed with SMEDDS over suspension formulation, which was evident by slow rate of absorption of nilotinib from SMEDDS.Conclusion: This research demonstrated that SMEDDS could be an effective approach to improve solubility and oral bioavailability for the BCS class II poorly soluble nilotinib.
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Affiliation(s)
- Ashok Zakkula
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
| | | | - Ravi Kumar Jairam
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
| | - Vinay Kiran
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
| | - Umesh Todmal
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
| | - Ramesh Mullangi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Bangalore, India
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Tripathy HK, Nair Manju SV, Zakkula A, Bestha RM, Dittakavi S, Mullangi R. Validated HPLC Method for Quantification of a Novel Trk Inhibitor, Larotrectinib in Mice Plasma: Application to a Pharmacokinetic Study. Drug Res (Stuttg) 2020; 70:101-106. [PMID: 31931548 DOI: 10.1055/a-1071-0849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Larotrectinib, is an orally active novel small molecule approved for the treatment of solid tumors in pediatrics and adult patients. It acts by inhibiting tropomyosin receptor kinase. In this paper, we report the development and validation of a high-performance liquid chromatography (HPLC) method for the quantitation of larotrectinib in mice plasma as per the FDA regulatory guideline. Plasma samples processing was accomplished through simple protein precipitation using acetonitrile enriched with internal standard (IS, enasidenib). The chromatographic analysis was performed using a gradient mobile phase comprising 10 mM ammonium acetate and acetonitrile at a flow-rate of 0.8 mL/min on an X-Terra Phenyl column. The UV detection wave length was set at λmax 262 nm. Larotrectinib and the IS eluted at 3.85 and 6.60 min, respectively with a total run time of 8.0 min. The calibration curve was linear over a concentration range of 0.20-5.00 μg/mL (r2=≥0.992). The intra- and inter-day precision and accuracy results were within the acceptable limits. Results of stability studies indicated that larotrectinib was stable on bench-top, in auto-sampler, up to three freeze/thaw cycles and long-term storage at -80°C. The validated HPLC method was successfully applied to a pharmacokinetic study in mice.
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Affiliation(s)
- Harsha K Tripathy
- Karnataka College of Pharmacy Bangalore, Medicinal Chemistry, Bangalore, India
| | - S V Nair Manju
- Karnataka College of Pharmacy Bangalore, Medicinal Chemistry, Bangalore, India
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Dittakavi S, Hallur G, Purra BR, Kiran V, Zakkula A, Mullangi R. Validated LC-MS/MS Method for Simultaneous Quantitation of Enasidenib and its Active Metabolite, AGI-16903 in Small Volume Mice Plasma: Application to a Pharmacokinetic Study. Drug Res (Stuttg) 2019; 70:41-48. [PMID: 31652462 DOI: 10.1055/a-1024-3623] [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: 10/25/2022]
Abstract
Enasidenib is a selective mutant isocitrate dehydrogenase 2 inhibitor approved for the treatment of relapsed and refractory acute myeloid leukemia patients. A sensitive and rapid method has been developed and validated as per regulatory guideline for the simultaneous quantitation of enasidenib and its active metabolite, AGI-16903 in mice plasma using an LC-MS/MS. Enasidenib and AGI-16903 along with internal standard were extracted from mice plasma using simple protein precipitation method. Chromatographic resolution of enasidenib, AGI-16903 and the internal standard (close analogue of AGI-16903) was achieved on a Chromolith RP-18e column using 0.2% formic acid:acetonitrile (15:85, v/v) as an eluent, which was delivered at a flow-rate of 1.2 mL/min. The MS/MS ion transitions monitored were m/z 474.1→267.2, 402.1→188.1 and 421.0→146.1 for enasidenib, AGI-16903 and the internal standard, respectively. The linearity range was 1.01-3023 ng/mL for both enasidenib and AGI-16903. The within-run and between-run accuracy and within-run and between-run precision were in the range of - 2.29 to 2.72 (as one value is in negative side). and 4.65-9.82%, respectively for enasidenib; 0.19-10.3 and 3.22-9.22%, respectively for AGI-16903. Both enasidenib and AGI-16903 were found to be stable in stability (up to three freeze-thaw cycles and for long-term at -80°C for 30 days) and processed (bench-top for 6 h and in in-injector for 24 h) samples. Application of the validated method was shown in a pharmacokinetic study in mice.
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Affiliation(s)
- Sreekanth Dittakavi
- Jubilant Biosys, Drug Metabolism and Pharmacokinetics, Bangalore, India.,Jubilant Biosys, Department of Medicinal Chemistry, Bangalore, India
| | | | - Buchi Reddy Purra
- Jubilant Biosys, Department of Medicinal Chemistry, Bangalore, India
| | - Vinay Kiran
- Jubilant Biosys, Drug Metabolism and Pharmacokinetics, Bangalore, India
| | - Ashok Zakkula
- Jubilant Biosys, Drug Metabolism and Pharmacokinetics, Bangalore, India
| | - Ramesh Mullangi
- Jubilant Biosys, Drug Metabolism and Pharmacokinetics, Bangalore, India
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Zakkula A, Dittakavi S, Maniyar MM, Syed N, Sulochana SP, Zainuddin M, Mullangi R. Validated HPLC method for simultaneous quantification of mutant IDH1/2 inhibitors (enasidenib, ivosidenib and vorasidenib) in mouse plasma: Application to a pharmacokinetic study. Biomed Chromatogr 2019; 33:e4658. [DOI: 10.1002/bmc.4658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/12/2019] [Accepted: 07/15/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Ashok Zakkula
- Drug Metabolism and PharmacokineticsJubilant Biosys Ltd Bangalore India
| | | | | | - Naveem Syed
- Drug Metabolism and PharmacokineticsJubilant Biosys Ltd Bangalore India
| | | | - Mohd Zainuddin
- Drug Metabolism and PharmacokineticsJubilant Biosys Ltd Bangalore India
| | - Ramesh Mullangi
- Drug Metabolism and PharmacokineticsJubilant Biosys Ltd Bangalore India
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Jairam RK, Mallurwar SR, Gabani BB, Zakkula A, Kiran V, Dittakavi S, Sulochana SP, Mohd Z, Srinivas NR, Mullangi R. Uptake and pharmacokinetics of cefuroxime in rabbits after intravitreal, intracameral, and topical dosing: relevance to human ocular injection of cefuroxime. Xenobiotica 2019; 50:339-345. [PMID: 31144563 DOI: 10.1080/00498254.2019.1624872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cefuroxime is one of the widely used antibiotics. The objective of this study was to determine pharmacokinetics and disposition in various ocular tissues following topical (TOP), intracameral (IC) and intravitreal (IVT) administration of cefuroxime to rabbits.Following TOP, IC and IVT dosing plasma and various ocular tissues (aqueous humor (AH), vitreous humor (VH), conjunctiva, trabecular mesh (TM), lens and retina-choroid (RC)) were collected and analyzed to understand the disposition of cefuroxime. Postintravenous administration plasma samples were collected to determine the systemic pharmacokinetics.Post-TOP dosing cefuroxime concentrations were observed only in conjunctiva up to 48 h. IC administration showed cefuroxime concentrations in AH up to 8 h; in conjunctiva, TM and plasma, the concentration lasted up to 4 h and in RC and VH till 1 h. IVT administration of cefuroxime showed concentrations in all ocular tissues (up to 8 h) and lasted up to 48 h except in conjunctiva and RC.There was evidence that the mechanism(s) of cefuroxime entry into the eye by via IVT, IC and TOP routes is clearly different. The present ocular tissue data may aid clinicians for considering appropriate choice in the treatment of post-operative ocular complications due to bacterial infections including endophthalmitis.
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Affiliation(s)
- Ravi Kumar Jairam
- Drug Metabolism and Pharmacokinetics, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Sadanand R Mallurwar
- Drug Metabolism and Pharmacokinetics, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Bhavesh B Gabani
- Drug Metabolism and Pharmacokinetics, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Ashok Zakkula
- Drug Metabolism and Pharmacokinetics, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Vinay Kiran
- Drug Metabolism and Pharmacokinetics, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Sreekanth Dittakavi
- Drug Metabolism and Pharmacokinetics, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Suresh P Sulochana
- Drug Metabolism and Pharmacokinetics, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Zainuddin Mohd
- Drug Metabolism and Pharmacokinetics, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | | | - Ramesh Mullangi
- Drug Metabolism and Pharmacokinetics, Industrial Suburb, Yeshwanthpur, Bangalore, India
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12
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Zakkula A, Kiran V, Todmal U, Sulochana SP, Mullangi R. RP-HPLC-UV Method for Simultaneous Quantification of Second Generation Non-Steroidal Antiandrogens Along with their Active Metabolites in Mice Plasma: Application to a Pharmacokinetic Study. Drug Res (Stuttg) 2018; 69:537-544. [PMID: 30536259 DOI: 10.1055/a-0790-8309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A simple, specific and reproducible high-performance liquid chromatography (HPLC) assay method has been developed and validated for the quantitation of second generation antiandrogens and their active metabolites namely apalutamide, enzalutamide, N-desmethylenzalutamide (active metabolite of enzalutamide), darolutamide and ORM-15341 (active metabolite of darolutamide) in mice plasma. The method involves extraction of apalutamide, enzalutamide, N-desmethylenzalutamide, darolutamide and ORM-15341 along with internal standard (IS) from 100 µL mice plasma through a simple protein precipitation process. The chromatographic analysis was performed on a Waters Alliance HPLC system using a gradient mobile phase (comprising 10 mM ammonium acetate and acetonitrile in a flow-gradient) and X-Terra Phenyl column. The UV detection wave length was set at λmax 250 nm. Apalutamide, enzalutamide, N-desmethylenzalutamide, darolutamide and ORM-15341 and the IS eluted at 13.6, 11.4, 9.68, 6.11, 6.93 and 4.69 min, respectively with a total run time of 15 min. Method validation was performed as per regulatory guidelines and the results met the acceptance criteria. The calibration curve was linear over a concentration range of 209 - 5215 ng/mL (r 2=0.998). The intra- and inter-day precisions were in the range of 0.56-13.5 and 1.04-13.9%, respectively. The validated HPLC method was successfully applied to a pharmacokinetic study in mice.
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Affiliation(s)
- Ashok Zakkula
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Vinay Kiran
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Umesh Todmal
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Suresh P Sulochana
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
| | - Ramesh Mullangi
- Drug Metabolism and Pharmacokinetics, Jubilant Biosys Ltd, Industrial Suburb, Yeshwanthpur, Bangalore, India
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