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Nayak S, Borse S, Jha S, Mehta VN, Murthy ZVP, Park TJ, Kailasa SK. Development of Copper Nanoclusters-Based Turn-Off Nanosensor for Fluorescence Detection of Two Pyrethroid Pesticides (Cypermethrin and Lambda-Cyhalothrin). J Fluoresc 2023:10.1007/s10895-023-03537-0. [PMID: 38109031 DOI: 10.1007/s10895-023-03537-0] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 11/30/2023] [Indexed: 12/19/2023]
Abstract
Fluorescent copper nanoclusters (Cu NCs) were synthesized by using Withania somnifera (W. somnifera) plant extract as a biotemplate. Aqueous dispersion of W. somnifera-Cu NCs displays intense emission peak at 458 nm upon excitation at 350 nm. This fluorescence emission was utilized for the detection of two pyrethroid pesticides (cypermethrin and lambda-cyhalothrin) via "turn-off" mechanism. Upon the addition of two pyrethiod pesticides independently, the fluorescence emission of W. somnifera-Cu NCs was gradually decreased with increasing concentrations of both pesticides. It was noticed that the decrease in emission intensity at 458 nm was linearly dependent on the logarithm of both pesticides concentrations in the ranges of 0.01-100 μM and of 0.05-100 μM for cypermethrin and lambda-cyhalothrin, respectively. Consequently, the limits of detection were found to be 27.06 and 23.28 nM for cypermethrin and lambda-cyhalothrin, respectively. The as-fabricated W. somnifera-Cu NCs acted as a facile sensor for the analyses of cypermethrin and lambda-cyhalothrin in vegetables (tomato and bottle gourd), which demonstrates that it could be used as portable sensing platform for assaying of two pyrethroid pesticides in food samples.
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Affiliation(s)
- Satyaprakash Nayak
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395 007, India
| | - Shraddha Borse
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395 007, India
| | - Sanjay Jha
- ASPEE SHAKILAM Biotechnology Institute, Navsari Agricultural University, Surat, 395007, Gujarat, India
| | - Vaibhavkumar N Mehta
- ASPEE SHAKILAM Biotechnology Institute, Navsari Agricultural University, Surat, 395007, Gujarat, India
| | - Z V P Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, 395 007, India
| | - Tae Jung Park
- Department of Chemistry, Research Institute of Chem-Bio Diagnostic Technology, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Suresh Kumar Kailasa
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395 007, India.
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Zhu R, Vora B, Menon S, Younis I, Dwivedi G, Meng Z, Datta-Mannan A, Manchandani P, Nayak S, Tammara BK, Garhyan P, Iqbal S, Dagenais S, Chanu P, Mukherjee A, Ghobadi C. Clinical Pharmacology Applications of Real-World Data and Real-World Evidence in Drug Development and Approval-An Industry Perspective. Clin Pharmacol Ther 2023; 114:751-767. [PMID: 37393555 DOI: 10.1002/cpt.2988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 06/19/2023] [Indexed: 07/04/2023]
Abstract
Since the 21st Century Cures Act was signed into law in 2016, real-world data (RWD) and real-world evidence (RWE) have attracted great interest from the healthcare ecosystem globally. The potential and capability of RWD/RWE to inform regulatory decisions and clinical drug development have been extensively reviewed and discussed in the literature. However, a comprehensive review of current applications of RWD/RWE in clinical pharmacology, particularly from an industry perspective, is needed to inspire new insights and identify potential future opportunities for clinical pharmacologists to utilize RWD/RWE to address key drug development questions. In this paper, we review the RWD/RWE applications relevant to clinical pharmacology based on recent publications from member companies in the International Consortium for Innovation and Quality in Pharmaceutical Development (IQ) RWD Working Group, and discuss the future direction of RWE utilization from a clinical pharmacology perspective. A comprehensive review of RWD/RWE use cases is provided and discussed in the following categories of application: drug-drug interaction assessments, dose recommendation for patients with organ impairment, pediatric plan development and study design, model-informed drug development (e.g., disease progression modeling), prognostic and predictive biomarkers/factors identification, regulatory decisions support (e.g., label expansion), and synthetic/external control generation for rare diseases. Additionally, we describe and discuss common sources of RWD to help guide appropriate data selection to address questions pertaining to clinical pharmacology in drug development and regulatory decision making.
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Affiliation(s)
- Rui Zhu
- Clinical Pharmacology, Genentech, Inc., South San Francisco, California, USA
| | - Bianca Vora
- Clinical Pharmacology, Genentech, Inc., South San Francisco, California, USA
| | - Sujatha Menon
- Clinical Pharmacology, Pfizer Inc., Groton, Connecticut, USA
| | - Islam Younis
- Clinical Pharmacology, Gilead Sciences, Inc., Foster City, California, USA
| | - Gaurav Dwivedi
- Quantitative Clinical Pharmacology, Takeda Development Center Americas, Inc., Cambridge, Massachusetts, USA
| | - Zhaoling Meng
- R&D Data and Data Science, Clinical Modeling & Evidence Integration, Sanofi, Cambridge, Massachusetts, USA
| | - Amita Datta-Mannan
- Exploratory Medicine & Pharmacology, Eli Lilly and Company, Indianapolis, Indiana, USA
| | - Pooja Manchandani
- Clinical Pharmacology and Exploratory Division, Astellas Pharma Global Development, Northbrook, Illinois, USA
| | | | | | - Parag Garhyan
- Global PK/PD/Pharmacometrics, Eli Lilly and Company, Indianapolis, Indiana, USA
| | - Shahed Iqbal
- Biomarker Sciences, Gilead Sciences, Inc., Foster City, California, USA
| | - Simon Dagenais
- Real World Evidence Center of Excellence, Pfizer, Inc., New York, New York, USA
| | - Pascal Chanu
- Clinical Pharmacology, Genentech/Roche, Inc., Lyon, France
| | - Arnab Mukherjee
- Clinical Pharmacology, Pfizer Inc., Groton, Connecticut, USA
| | - Cyrus Ghobadi
- Exploratory Medicine & Pharmacology, Eli Lilly and Company, Indianapolis, Indiana, USA
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Cadzow L, Gokhale P, Ganapathy S, Sullivan P, Nayak S, Shenker S, Schlabach M, Tobin E, Matulonis U, Liu J, Stegmeier F, Wylie A. KSQ-4279, a first-in-class USP1 inhibitor shows strong combination activity in BRCA mutant cancers with intrinsic or acquired resistance to PARP inhibitors. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)00900-5] [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: 12/01/2022]
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Kumar V, Nayak S, Rathore V, Bhat S, jindal A, Siddiqui S, Dola J, sahu A, Galhotra A, nagarkar N, Behera A. POS-027 COMPARISON OF CLINICAL OUTCOMES OF FIRST, SECOND, AND THIRD WAVES OF COVID19 AMONG CKD PATIENTS REQUIRING RRT IN A TERTIARY CARE HOSPITAL IN CENTRAL INDIA. Kidney Int Rep 2022. [PMCID: PMC9475100 DOI: 10.1016/j.ekir.2022.07.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Overmiller A, Uchiyama A, Hope E, Sawaya A, Nayak S, Hasneen K, Dell'Orso S, Brooks S, Morasso M. 760 Cellular landscape of the skin is primed by the oral epithelial regenerative transcription factor Pitx1 to promote wound healing. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.773] [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: 10/17/2022]
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Bajpai D, Mehdizadeh S, Uchiyama A, Inoue Y, Sawaya A, Nayak S, Brooks S, Kellett M, Palazzo E, Motegi S, Cataisson C, Morasso M. 088 Deciphering the molecular signals of EGFR pathway activation in Dlx3 deficient skin in cSCC. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.023] [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: 11/26/2022]
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Pandey A, Nayak S, Khare A, Sharma R, Reddy BVV, Risheen GD. Perspectives in the use of tannins in animal production & health: a review. Journal of Livestock Science 2022. [DOI: 10.33259/jlivestsci.2022.112-119] [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: 11/11/2022]
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Nayak S, Greenspan SL. Cost-effectiveness of 3 versus 6 years of zoledronic acid treatment before bisphosphonate holiday for women with osteoporosis. Osteoporos Int 2022; 33:229-238. [PMID: 34515818 DOI: 10.1007/s00198-021-06010-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Accepted: 05/17/2021] [Indexed: 12/16/2022]
Abstract
UNLABELLED We evaluated the cost-effectiveness of recurrent periods of 3 versus 6 years of zoledronic acid treatment prior to 3-year bisphosphonate holidays for US postmenopausal women with osteoporosis and femoral neck BMD T-scores between - 2.5 and - 3.5. We found that cycles of 3 years of treatment followed by holidays is likely to be the more cost-effective option. INTRODUCTION We compared the effectiveness and cost-effectiveness of cycles of 3 years versus 6 years of zoledronic acid treatment prior to 3-year bisphosphonate holidays for US postmenopausal women with osteoporosis. METHODS We developed an individual-level state-transition microsimulation cost-effectiveness model to compare treatment strategies over the lifetime of recurrent periods of 3 years of zoledronic acid followed by 3-year holidays (zoledronic acid 3/3), recurrent periods of 6 years of zoledronic acid followed by 3-year holidays (zoledronic acid 6/3), and no zoledronic acid treatment for women with osteoporosis and femoral neck BMD T-scores between - 2.5 and - 3.5. RESULTS Base-case analysis and all key parameter sensitivity analysis findings for every treatment initiation age evaluated (50, 60, 70, and 80) revealed that zoledronic acid 3/3 was consistently the most cost-effective strategy, assuming a willingness-to-pay of $100,000 per quality-adjusted life-year (QALY). In general, the zoledronic acid 3/3 and 6/3 strategies were relatively close in effectiveness (QALYs) over the lifetime; however, lifetime direct health care costs were on average approximately $2000 lower for the 3/3 strategy. Probabilistic sensitivity analysis results revealed that the zoledronic acid 3/3 strategy was favored in greater than 70% of the iterations for a willingness-to-pay threshold of $100,000/QALY for all treatment initiation ages evaluated. CONCLUSIONS After 3 years of zoledronic acid treatment for postmenopausal women with osteoporosis and femoral neck BMD T-scores between - 2.5 and - 3.5, taking 3-year holidays before restarting another treatment cycle is likely to be more cost-effective over the lifetime than cycles of 6 years of treatment prior to 3-year holidays.
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Affiliation(s)
- S Nayak
- Berkeley Madonna, Inc., 1025 Peralta Ave, CA, 94706, Albany, USA.
| | - S L Greenspan
- University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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Reddy BVV, Nayak S, Khare A, Pal RP, Sharma R, Chourasiya A, Namdeo S, Thakur S. Role of hydroxy trace minerals on health and production of livestock: a review. Journal of Livestock Science 2021. [DOI: 10.33259/jlivestsci.2021.279-286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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D’Haens GR, Reinisch W, Lee SD, Tarabar D, Louis E, Kłopocka M, Klaus J, Schreiber S, Il Park D, Hébuterne X, Nagy P, Cataldi F, Martin SW, Nayak S, Banerjee A, Gorelick KJ, Sandborn WJ. Long-Term Safety and Efficacy of the Anti-Mucosal Addressin Cell Adhesion Molecule-1 Monoclonal Antibody Ontamalimab (SHP647) for the Treatment of Crohn's Disease: The OPERA II Study. Inflamm Bowel Dis 2021; 28:1034-1044. [PMID: 34427633 PMCID: PMC9247846 DOI: 10.1093/ibd/izab215] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Indexed: 01/03/2023]
Abstract
BACKGROUND Patients with Crohn's disease (CD) experience intestinal inflammation. Ontamalimab (SHP647), a fully human immunoglobulin G2 monoclonal antibody against mucosal addressin cell adhesion molecule-1, is a potential novel CD treatment. OPERA II, a multicenter, open-label, phase 2 extension study, assessed the long-term safety and efficacy of ontamalimab in patients with moderate-to-severe CD. METHODS Patients had completed 12 weeks of blinded treatment (placebo or ontamalimab at 22.5, 75, or 225 mg subcutaneously) in OPERA (NCT01276509) or had a clinical response to ontamalimab 225 mg in TOSCA (NCT01387594). Participants received ontamalimab at 75 mg every 4 weeks (weeks 0-72), then were followed up every 4 weeks for 24 weeks. One-time dose reduction to 22.5 mg or escalation to 225 mg was permitted at the investigator's discretion. The primary end points were safety and tolerability outcomes. Secondary end points included changes in serum drug and biomarker concentrations. Efficacy end points were exploratory, and used non-responder imputation methods. RESULTS Overall, 149/268 patients completed the study. The most common adverse event leading to study discontinuation was CD flare (19.8%). Two patients died; neither death was considered to be drug related. No dose reductions occurred; 157 patients had their dose escalated. Inflammatory biomarker concentrations decreased. Serum ontamalimab levels were consistent with known pharmacokinetics. Remission rates (Harvey-Bradshaw Index [HBI] ≤ 5; baseline, 48.1%; week 72, 37.3%) and response rates (baseline [decrease in Crohn's Disease Activity Index ≥ 70 points], 63.1%; week 72 [decrease in HBI ≥ 3], 42.5%) decreased gradually. CONCLUSIONS Ontamalimab was well tolerated; treatment responses appeared to be sustained over 72 weeks.ClinicalTrials.gov ID: NCT01298492.
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Affiliation(s)
- Geert R D’Haens
- Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands
| | - Walter Reinisch
- Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Scott D Lee
- Division of Gastroenterology, University of Washington, Seattle, WA, USA
| | - Dino Tarabar
- Clinic of Gastroenterology and Hepatology, Military Medical Academy, Belgrade, Serbia
| | - Edouard Louis
- Department of Clinical Sciences, University Hospital Centre Hospitalier Universitaire of Liège, Liège, Belgium
| | - Maria Kłopocka
- Nicolaus Copernicus University, Collegium Medicum in Bydgoszcz, Bydgoszcz, Poland
| | - Jochen Klaus
- Clinic for Internal Medicine, University Hospital Ulm, Ulm, Germany
| | - Stefan Schreiber
- Clinic for Internal Medicine I, University Hospital Schleswig-Holstein, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Dong Il Park
- Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University, Seoul, South Korea
| | - Xavier Hébuterne
- University Côte d’Azur, Centre Hospitalier Universitaire of Nice, Nice, France
| | - Peter Nagy
- Address correspondence to: Peter Nagy, MD, Takeda Pharmaceuticals International AG, Thurgauerstrasse 130, 8152 Glattpark-Opfikon, Switzerland ()
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Nayak S, Tammara B, Harnisch LO. Population Pharmacokinetic Analysis of Rivipansel in Healthy Subjects and Subjects with Sickle Cell Disease. Drugs R D 2021; 21:217-229. [PMID: 33993463 PMCID: PMC8206303 DOI: 10.1007/s40268-021-00346-3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/12/2021] [Indexed: 11/24/2022] Open
Abstract
Background Sickle cell disease is an inherited blood disorder with reduced blood-carrying capacity. It is associated with a tendency to form microclots in blood vessels, leading to painful episodes known as a vaso-occlusive crisis. Rivipansel is a pan-selectin inhibitor being studied for the treatment of a vaso-occlusive crisis in patients with sickle cell disease. Methods A population pharmacokinetic model of rivipansel plasma and urine concentrations was constructed using a two-compartment model and data from nine different clinical studies. Creatinine clearance was calculated using the Schwartz formula for children and the Chronic Kidney Disease Epidemiology Collaboration formula for adults. Urine volume and concentration of the study drug in urine from subjects in five clinical studies were used to estimate renal and nonrenal clearance. Results Rivipansel drug concentrations were well described by the model. The post hoc estimates of average steady-state concentrations were predicted to be similar for the adult and pediatric cohorts of the pivotal phase III study. Parameter estimates showed almost exclusively renal excretion of rivipansel, which is consistent with the known properties of the drug. Conclusions The pharmacokinetics of rivipansel was well characterized by a two-compartment population pharmacokinetic model. Our results illustrate the important role of simulations in optimizing a potential drug dosing regimen for patients with sickle cell disease and progressive renal impairment. Supplementary Information The online version contains supplementary material available at 10.1007/s40268-021-00346-3.
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Affiliation(s)
| | | | - Lutz O Harnisch
- Pfizer Ltd, London, UK. .,Global Clinical Pharmacology, Pfizer Inc., IPC096, Ramsgate Road, Sandwich, Kent, CT13 9NJ, UK.
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Overmiller A, Uchiyama A, Hope E, Grassini D, Sawaya A, Nayak S, Hasneen K, Chen Y, Brooks S, Morasso M. 611 Oral epithelial regenerative transcription factor Pitx1 reprograms keratinocytes to promote cutaneous wound healing. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.640] [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: 11/30/2022]
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13
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Wattoo G, Nayak S, Khan S, Morgan J, Hocking H, MacInnes E, Kolar KM, Rogers C, Olubowale O, Rigby K, Kazzazi NH, Wyld L. Long-term outcomes of latissimus dorsi flap breast reconstructions: A single-centre observational cohort study with up to 12 years of follow up. J Plast Reconstr Aesthet Surg 2020; 74:2202-2209. [PMID: 33451948 DOI: 10.1016/j.bjps.2020.12.058] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 11/22/2020] [Accepted: 12/19/2020] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The Latissimus Dorsi Myocutaneous Flap (LDMF) is used in post-mastectomy reconstruction. This study has evaluated long-term (up to 12 years) surgical- and patient-reported outcomes from LDMF procedures. METHOD A retrospective analysis of consecutive LDMF procedures in two UK hospitals, performed between 2006 and 2016. Case notes were reviewed for indications and outcomes. Patients were sent the BREAST-QⓇ survey by post. Outcomes, including surgical adverse events, revision, and implant loss rates, were correlated with patient risk factors. RESULTS A BREAST-Q was posted to 199/248 LDMF patients in 2018, (excluding 49 patients due to death, reduced cognitive function and incorrect coding) of whom 77 patients responded (38.7%). In 188 cases (representing 208 LDMFs), surgical outcomes were assessable. Median time since LDMF surgery was 7 years (range 2-12). Rates of acute implant loss were 9/139 (6.4%), flap necrosis 7/208 (3.4%), shoulder stiffness 4/208 (1.9%), chronic pain 24/208 (11.5%) and unplanned revision surgery 13/208 (7%). Median satisfaction levels were high with 78% of patients satisfied with treatment outcomes, 65% of patients satisfied with their breasts, 71% of patients satisfied psychosocially and 75% of patients satisfied with their chest. Receipt of radiotherapy was not associated with a higher risk of flap necrosis or capsule formation. CONCLUSION Long-term follow-up of a large cohort of LDMF reconstruction patients show relatively low levels of adverse events and unplanned revision surgery and high patient satisfaction, which demonstrates how temporally robust the technique is. With the rise in popularity of acellular dermal matrix reconstructions, the LDMF has relatively fallen out of favour but its potential in primary and delayed reconstruction is demonstrated.
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Affiliation(s)
- G Wattoo
- Jasmine Breast Unit, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom
| | - S Nayak
- Jasmine Breast Unit, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom
| | - S Khan
- Jasmine Breast Unit, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom
| | - J Morgan
- Jasmine Breast Unit, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom; Department of Oncology and Metabolism, E Floor, Medical School, Beech Hill Road, University of Sheffield, S10 2RX, United Kingdom
| | - H Hocking
- Clinical Audit Department, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom
| | - E MacInnes
- Leeds Teaching Hospitals NHS FT, Leeds, United Kingdom
| | - K M Kolar
- Jasmine Breast Unit, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom
| | - C Rogers
- Jasmine Breast Unit, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom
| | - O Olubowale
- Jasmine Breast Unit, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom
| | - K Rigby
- Jasmine Breast Unit, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom
| | - N H Kazzazi
- Jasmine Breast Unit, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom
| | - L Wyld
- Jasmine Breast Unit, Doncaster and Bassetlaw Teaching Hospitals NHS FT, Armthorpe Road, Doncaster, United Kingdom; Department of Oncology and Metabolism, E Floor, Medical School, Beech Hill Road, University of Sheffield, S10 2RX, United Kingdom.
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Rogers KV, Martin SW, Bhattacharya I, Singh RSP, Nayak S. A Dynamic Quantitative Systems Pharmacology Model of Inflammatory Bowel Disease: Part 1 - Model Framework. Clin Transl Sci 2020; 14:239-248. [PMID: 32822108 PMCID: PMC7877855 DOI: 10.1111/cts.12849] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 06/14/2020] [Indexed: 12/14/2022] Open
Abstract
A mechanistic, multistate, mathematical model of inflammatory bowel disease (IBD) was developed by including key biological mechanisms in blood and gut, including cell differentiation, cytokine production, and clinical biomarkers. The model structure is consistent between healthy volunteers and IBD disease phenotype, with 24 parameters changed between diseases. Modular nature of the model allows for easy incorporation of new mechanisms or modification of existing interactions. Model simulations for steady-state levels of proteins and cells in the blood and gut using a population approach are consistent with published data. By simulating the response of two clinical biomarkers, C-reactive protein and fecal calprotectin, to parameter perturbations, the model explores hypotheses for possible treatment mechanisms. With additional experimental validation and addition of drug treatments, the model provides a platform to test hypothesis on treatment effects in IBD.
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Affiliation(s)
- Katharine V Rogers
- Biologics Development Sciences, Janssen Biotherapeutics, Janssen Research & Development, LLC, Raritan, New Jersey, USA
| | - Steven W Martin
- Pharmacometrics, Global Clinical Pharmacology, Pfizer Inc., Cambridge, Massachusetts, USA
| | | | | | - Satyaprakash Nayak
- Pharmacometrics, Global Clinical Pharmacology, Pfizer Inc., Cambridge, Massachusetts, USA
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Rogers KV, Martin SW, Bhattacharya I, Singh RSP, Nayak S. A Dynamic Quantitative Systems Pharmacology Model of Inflammatory Bowel Disease: Part 2 - Application to Current Therapies in Crohn's Disease. Clin Transl Sci 2020; 14:249-259. [PMID: 32822115 PMCID: PMC7877864 DOI: 10.1111/cts.12850] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 12/17/2019] [Accepted: 06/14/2020] [Indexed: 12/31/2022] Open
Abstract
Inflammatory bowel disease (IBD) is a heterogeneic disease with a variety of treatments targeting different mechanisms. A multistate, mechanistic, mathematical model of IBD was developed in part 1 of this two-part article series. In this paper, application of the model to predict response of key clinical biomarkers following different treatment options for Crohn's disease was explored. Five therapies, representing four different mechanisms of action, were simulated in the model and longitudinal profiles of key clinical markers, C-reactive protein and fecal calprotectin were compared with clinical observations. Model simulations provided an accurate match with both central tendency and variability observed in biomarker profiles. We also applied the model to predict biomarker and clinical response in an experimental, combination therapy of existing therapeutic options and provide possible mechanistic basis for the increased response. Overall, we present a validated, modular, mechanistic model construct, which can be applied to explore key biomarkers and clinical outcomes in IBD.
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Affiliation(s)
- Katharine V Rogers
- Biologics Development Sciences, Janssen Biotherapeutics, Janssen Research and Development, LLC, Spring House, Pennsylvania, USA
| | - Steven W Martin
- Pharmacometrics, Global Clinical Pharmacology, Pfizer Inc., Cambridge, Massachusetts, USA
| | - Indranil Bhattacharya
- Clinical Pharmacology and Pharmacometrics, Takeda Pharmaceuticals, Cambridge, Massachusetts, USA
| | | | - Satyaprakash Nayak
- Pharmacometrics, Global Clinical Pharmacology, Pfizer Inc., Cambridge, Massachusetts, USA
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Raseta M, Bazarova A, Wright H, Parrott A, Nayak S. A novel toolkit for the prediction of clinical outcomes following mechanical thrombectomy. Clin Radiol 2020; 75:795.e15-795.e21. [PMID: 32718742 DOI: 10.1016/j.crad.2020.06.026] [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] [Received: 12/06/2019] [Accepted: 06/18/2020] [Indexed: 11/16/2022]
Abstract
AIM To develop a robust toolkit to aid decision-making for mechanical thrombectomy (MT) based on readily available patient variables that could accurately predict functional outcome following MT. MATERIALS AND METHODS Data from patients with anterior circulation stroke who underwent MT between October 2009 and January 2018 (n=239) were identified from our MT database. Patient explanatory variables were age, sex, National Institutes of Health Stroke Scale (NIHSS), Alberta Stroke Program Early CT Score (ASPECTS), collateral score, and Glasgow Coma Scale. Five models were developed from the data to predict five outcomes of interest: model 1: prediction of survival: modified Rankin Scale (mRS) of 0-5 (alive) or 6 (dead); model 2: prediction of good/poor outcome: mRS of 0-3 (good), or 4-6 (poor); model 3: prediction of good/poor outcome: mRS of 0-2 (good), or 3-6 (poor); model 4: prediction of mRS category: mRS of 0-2 (no disability), 3 (minor disability), 4-5 (severe disability) or 6 (dead); model 5: prediction of the exact mRs score (mRs as a continuous variable). The accuracy and discriminative power of each predictive model were tested. RESULTS Prediction of survival was 87% accurate (area under the curve [AUC] 0.89). Prediction of good/poor outcome was 91% accurate (AUC 0.94) for Model 2 and 95% accurate (AUC 0.98) for Model 3. Prediction of mRS category was 76% accurate, and increased to 98% using the "one-score-out rule". Prediction of the exact mRS value was accurate to an error of 0.89. CONCLUSIONS This novel toolkit provided accurate estimations of outcome for MT.
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Affiliation(s)
- M Raseta
- Institute for Applied Clinical Sciences, Keele University, Staffordshire, ST5 5BG, UK
| | - A Bazarova
- Institute of Cancer and Genomic Sciences, Centre for Computational Biology, University of Birmingham, 6 Mindelsohn Way, Birmingham, B15 2SY, UK
| | - H Wright
- University Hospital of North Midlands NHS Trust, Newcastle Rd, Stoke-on-Trent, ST4 6QG, UK
| | - A Parrott
- Keele University School of Medicine, Newcastle Road, Stoke-on-Trent, ST4 6QG, UK
| | - S Nayak
- University Hospital of North Midlands NHS Trust, Newcastle Rd, Stoke-on-Trent, ST4 6QG, UK.
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Nayak S, Greenspan SL. Cost-effectiveness of five versus ten years of alendronate treatment prior to drug holiday for women with osteoporosis. Osteoporos Int 2020; 31:1273-1282. [PMID: 32020265 PMCID: PMC8215100 DOI: 10.1007/s00198-019-05258-2] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 12/03/2019] [Indexed: 11/24/2022]
Abstract
UNLABELLED We performed a cost-effectiveness analysis comparing 5 versus 10 years of alendronate treatment prior to 5-year drug holiday for US postmenopausal women with hip BMD T-scores between - 2.5 and - 3.5. We found that for most postmenopausal women 5 years of treatment prior to drug holiday is the more effective and cost-effective option. INTRODUCTION We performed a cost-effectiveness analysis to compare 5 versus 10 years of alendronate treatment prior to 5-year drug holiday for postmenopausal osteoporotic women. METHODS We created an individual-level state-transition microsimulation model to compare 3 treatment strategies for US postmenopausal women with osteoporosis and femoral neck BMD T-scores between - 2.5 and - 3.5 at baseline: recurrent periods of 5 years of alendronate followed by 5 years of drug holiday (alendronate 5/5), recurrent periods of 10 years of alendronate followed by 5 years of drug holiday (alendronate 10/5), and no alendronate treatment. RESULTS Base-case analysis revealed for women initiating treatment at ages 50, 60, and 70, the alendronate 5/5 strategy dominated (was more effective and less costly than) the alendronate 10/5 strategy and no treatment. For women age 80, the alendronate 10/5 strategy dominated. When assuming a lower relative risk of nonvertebral fracture during years 6-10 of alendronate treatment than the base-case assumption, the alendronate 10/5 strategy became the most cost-effective strategy even at younger treatment initiation ages. Probabilistic sensitivity analysis results supported the base-case findings; for treatment initiation ages of 50, 60, and 70, the alendronate 5/5 strategy was favored, whereas for treatment initiation age of 80, the alendronate 10/5 strategy was favored; however, there was uncertainty in these findings. CONCLUSIONS After 5 years of alendronate treatment, younger postmenopausal women (ages 50-70) with osteoporosis would likely benefit from a drug holiday, whereas older women (age 80) are likely to benefit from treatment for 10 years before a drug holiday.
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Affiliation(s)
- S Nayak
- Berkeley Madonna, Inc., Berkeley, CA, USA.
| | - S L Greenspan
- School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
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Shenoi S, Nayak S, Munoli R, Chawla A. P-02-77 Clinical Profile of Patients Attending a Multidisciplinary Sexual Dysfunction Clinic at a Tertiary Care Hospital. J Sex Med 2020. [DOI: 10.1016/j.jsxm.2020.04.224] [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: 11/29/2022]
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Fedotov AV, Altinbas Z, Belomestnykh S, Ben-Zvi I, Blaskiewicz M, Brennan M, Bruno D, Brutus C, Costanzo M, Drees A, Fischer W, Fite J, Gaowei M, Gassner D, Gu X, Halinski J, Hamdi K, Hammons L, Harvey M, Hayes T, Hulsart R, Inacker P, Jamilkowski J, Jing Y, Kewisch J, Kankiya P, Kayran D, Lehn R, Liaw CJ, Litvinenko V, Liu C, Ma J, Mahler G, Mapes M, Marusic A, Mernick K, Mi C, Michnoff R, Miller T, Minty M, Narayan G, Nayak S, Nguyen L, Paniccia M, Pinayev I, Polizzo S, Ptitsyn V, Rao T, Robert-Demolaize G, Roser T, Sandberg J, Schoefer V, Schultheiss C, Seletskiy S, Severino F, Shrey T, Smart L, Smith K, Song H, Sukhanov A, Than R, Thieberger P, Trabocchi S, Tuozzolo J, Wanderer P, Wang E, Wang G, Weiss D, Xiao B, Xin T, Xu W, Zaltsman A, Zhao H, Zhao Z. Experimental Demonstration of Hadron Beam Cooling Using Radio-Frequency Accelerated Electron Bunches. Phys Rev Lett 2020; 124:084801. [PMID: 32167359 DOI: 10.1103/physrevlett.124.084801] [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] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/24/2020] [Accepted: 02/03/2020] [Indexed: 06/10/2023]
Abstract
Cooling of beams of gold ions using electron bunches accelerated with radio-frequency systems was recently experimentally demonstrated in the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. Such an approach is new and opens the possibility of using this technique at higher energies than possible with electrostatic acceleration of electron beams. The challenges of this approach include generation of electron beams suitable for cooling, delivery of electron bunches of the required quality to the cooling sections without degradation of beam angular divergence and energy spread, achieving the required small angles between electron and ion trajectories in the cooling sections, precise velocity matching between the two beams, high-current operation of the electron accelerator, as well as several physics effects related to bunched-beam cooling. Here we report on the first demonstration of cooling hadron beams using this new approach.
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Affiliation(s)
- A V Fedotov
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Z Altinbas
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Belomestnykh
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - I Ben-Zvi
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Blaskiewicz
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Brennan
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - D Bruno
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C Brutus
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Costanzo
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - A Drees
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - W Fischer
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Fite
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Gaowei
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - D Gassner
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - X Gu
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Halinski
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - K Hamdi
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - L Hammons
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Harvey
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T Hayes
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - R Hulsart
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - P Inacker
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Jamilkowski
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Y Jing
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Kewisch
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - P Kankiya
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - D Kayran
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - R Lehn
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C J Liaw
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - V Litvinenko
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C Liu
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Ma
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - G Mahler
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Mapes
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - A Marusic
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - K Mernick
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C Mi
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - R Michnoff
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T Miller
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Minty
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - G Narayan
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Nayak
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - L Nguyen
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Paniccia
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - I Pinayev
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Polizzo
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - V Ptitsyn
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T Rao
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | | | - T Roser
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Sandberg
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - V Schoefer
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C Schultheiss
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Seletskiy
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - F Severino
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T Shrey
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - L Smart
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - K Smith
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - H Song
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - A Sukhanov
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - R Than
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - P Thieberger
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Trabocchi
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Tuozzolo
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - P Wanderer
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - E Wang
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - G Wang
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - D Weiss
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - B Xiao
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T Xin
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - W Xu
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - A Zaltsman
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - H Zhao
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Z Zhao
- Brookhaven National Laboratory, Upton, New York 11973, USA
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Affiliation(s)
- S. Nayak
- Department of Nephrology St. John's Medical College Hospital Bangalore, India
| | - R. Satish
- Department of Nephrology St. John's Medical College Hospital Bangalore, India
| | - Gokulnath
- Department of Nephrology St. John's Medical College Hospital Bangalore, India
| | - J. Savio
- Department of Microbiology St. John's Medical College Hospital Bangalore, India
| | - T. Rajalakshmi
- Department of Pathology St. John's Medical College Hospital Bangalore, India
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Affiliation(s)
- S Nayak
- Berkeley Madonna, Inc., 1135 Spruce St., Berkeley, CA, 94707-2629, USA.
| | - S L Greenspan
- University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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Gupta N, Bottino D, Simonsson USH, Musante CJ, Bueters T, Rieger TR, Macha S, Chenel M, Fancourt C, Kanodia J, Nayak S. Transforming Translation Through Quantitative Pharmacology for High-Impact Decision Making in Drug Discovery and Development. Clin Pharmacol Ther 2019; 107:1285-1289. [PMID: 31709519 DOI: 10.1002/cpt.1667] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 08/17/2019] [Indexed: 01/25/2023]
Affiliation(s)
- Neeraj Gupta
- Millennium Pharmaceuticals, Inc. (a wholly owned subsidiary of Takeda Pharmaceutical Company Limited), Cambridge, Massachusetts, USA
| | - Dean Bottino
- Millennium Pharmaceuticals, Inc. (a wholly owned subsidiary of Takeda Pharmaceutical Company Limited), Cambridge, Massachusetts, USA
| | | | | | | | | | | | | | | | - Jitendra Kanodia
- Theravance Biopharma US, Inc., South San Francisco, California, USA
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Nayak S, Avery A, Griffiss JM, Charles C, Culwell K. A randomized placebo-controlled pilot study of the effect and duration of Amphora, a multipurpose vaginal pH regulator, on vaginal pH. CLIN EXP OBSTET GYN 2019. [DOI: 10.12891/ceog5058.2019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Koride S, Nayak S, Banfield C, Peterson MC. Evaluating the Role of Janus Kinase Pathways in Platelet Homeostasis Using a Systems Modeling Approach. CPT Pharmacometrics Syst Pharmacol 2019; 8:478-488. [PMID: 31044523 PMCID: PMC6656939 DOI: 10.1002/psp4.12419] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 03/02/2019] [Indexed: 02/06/2023]
Abstract
Maintaining platelet homeostasis is important to avoid spontaneous bleeding and organ damage. Thrombopoietin, the primary regulator of platelet production, is affected by and acts in part via Janus kinase (JAK)‐signal transducer and activator of transcription (STAT)–mediated mechanisms. Interleukin‐6 is also partly responsible for inducing thrombopoietin production via the JAK‐STAT pathway. Although current understanding suggests that JAK2 is a primary mediator of platelet regulation, the emerging data show that a JAK1‐specific inhibitor resulted in the modulation of platelet numbers following dosing. To gain a mechanistic understanding, a model describing platelet regulation based on known physiology and JAK‐STAT pathways was built. The model provides a tool to coalesce biological understanding of platelet physiology and an in silico experimental platform to explore drug effects on platelet homeostasis. In this article, we explain the model construction and demonstrate the use of JAK‐inhibitor programs as informing probes of the physiology, gaining insights on dosing paradigms that avoid platelet‐related safety concerns.
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Affiliation(s)
- Sarita Koride
- Early Clinical Development, Clinical Pharmacology, Pfizer Inc., Cambridge, Massachusetts, USA
| | - Satyaprakash Nayak
- Global Product Development, Pharmacometrics, Pfizer Inc., Cambridge, Massachusetts, USA
| | - Christopher Banfield
- Early Clinical Development, Clinical Pharmacology, Pfizer Inc., Cambridge, Massachusetts, USA
| | - Mark C Peterson
- Global Product Development, Pharmacometrics, Pfizer Inc., Cambridge, Massachusetts, USA
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Nayak S, Cross M, Brooks S, Bible P, Jiang K, Dell'Orso S, Gutierrez-Cruz G, Naz F, Sun H, Morasso M. 312 Epigenetic modules governing skin epidermal homeostasis. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.388] [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: 10/27/2022]
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26
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Uchiyama A, Nayak S, Nayak S, Cross M, Overmiller A, Grassini D, Sawaya A, Gutkind J, Brooks S, Morasso M. 930 SOX2 epidermal overexpression promotes cutaneous wound healing via activation of EGFR/MEK/ERK signaling mediated by EGFR ligands. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.1006] [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: 11/27/2022]
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Nayak S, Greenspan SL. A systematic review and meta-analysis of the effect of bisphosphonate drug holidays on bone mineral density and osteoporotic fracture risk. Osteoporos Int 2019; 30:705-720. [PMID: 30623214 PMCID: PMC6499675 DOI: 10.1007/s00198-018-4791-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 11/19/2018] [Accepted: 11/25/2018] [Indexed: 10/27/2022]
Abstract
UNLABELLED We performed a systematic review on the effect of drug holidays (discontinuation) on bone mineral density (BMD) and fracture risk. Bisphosphonate discontinuation may be considered for women who do not have low hip BMD after 3-5 years of initial treatment, while women who have low hip BMD may benefit from treatment continuation. INTRODUCTION We performed a systematic review and meta-analysis on the effect of drug holidays (discontinuation) on BMD and fracture risk. METHODS We searched PubMed, Embase, and Cochrane Library databases to locate controlled clinical trials and cohort studies evaluating the effect of drug holidays/discontinuation versus osteoporosis treatment continuation. We performed random-effects meta-analyses of hazard ratios of hip and any clinical osteoporotic fracture for individuals who discontinued bisphosphonates compared to persistent users. RESULTS Thirteen records reporting results from eight different studies met inclusion criteria. The FLEX study found a reduced clinical vertebral fracture risk with 10 years of alendronate therapy compared to 5 (RR 0.45, 95% CI 0.24-0.85), and the HORIZON extension studies found a reduced risk of morphometric vertebral fracture with 6 years of zoledronic acid therapy compared to 3 (OR = 0.51, 95% CI 0.26-0.95); subgroup analyses showed that women with low hip BMD T-scores after the initial treatment period benefitted from continued treatment in terms of reduced vertebral fracture risk. Meta-analysis of adjusted hazard ratios of hip and any clinical osteoporotic fracture for women who discontinued bisphosphonates revealed no significant differences in the risk of hip fracture (summary estimate of HR 1.09, 95% CI 0.87-1.37) or any clinical fracture (summary estimate of HR 1.13, 95% CI 0.75-1.70) compared to persistent users. CONCLUSIONS Bisphosphonate discontinuation may be considered for women who do not have low hip BMD after 3 to 5 years of initial treatment, while women who have low hip BMD may benefit from treatment continuation.
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Affiliation(s)
- S Nayak
- Berkeley Madonna, Inc., 1135 Spruce St., Berkeley, CA, 94707-2629, USA.
| | - S L Greenspan
- University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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Anees M, Nayak S, Afarinkia K, Vinader V. Control of the stereochemistry of C14 hydroxyl during the total synthesis of withanolide E and physachenolide C. RSC Adv 2018; 8:39691-39695. [PMID: 35558026 PMCID: PMC9091292 DOI: 10.1039/c8ra08540d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 10/15/2018] [Accepted: 11/16/2018] [Indexed: 11/24/2022] Open
Abstract
The stereochemical outcome of the epoxidation of Δ14–15 cholestanes with mCPBA is controlled by the steric bulk of a C17 substituent. When the C17 is in the β configuration, the epoxide is formed in the α face, whereas if the C17 is trigonal (flat) or the substituent is in the α configuration, the epoxide is formed in the β face. The presence of a hydroxyl substituent at C20 does not influence the stereochemical outcome of the epoxidation. The epoxide configuration in oxidation of C14–C15 alkenes is determined by the configuration of the C17 substituent.![]()
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Affiliation(s)
- M Anees
- Institute of Cancer Therapeutics, University of Bradford Bradford BD7 1DP UK
| | - S Nayak
- School of Chemistry & Biosciences, University of Bradford Bradford BD7 1DP UK
| | - K Afarinkia
- Institute of Cancer Therapeutics, University of Bradford Bradford BD7 1DP UK
| | - V Vinader
- Institute of Cancer Therapeutics, University of Bradford Bradford BD7 1DP UK
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Patel M, Lakhani G, Ghosh S, Nayak S, Roy B, Baghel R, Jain A. Effect of Body Condition Score on Milk Production, Milk Composition and Reproductive Performance of Lactating Murrah Buffaloes. ACTA ACUST UNITED AC 2018. [DOI: 10.20546/ijcmas.2018.711.140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sandborn WJ, Lee SD, Tarabar D, Louis E, Klopocka M, Klaus J, Reinisch W, Hébuterne X, Park DI, Schreiber S, Nayak S, Ahmad A, Banerjee A, Brown LS, Cataldi F, Gorelick KJ, Cheng JB, Hassan-Zahraee M, Clare R, D'Haens GR. Phase II evaluation of anti-MAdCAM antibody PF-00547659 in the treatment of Crohn's disease: report of the OPERA study. Gut 2018; 67:1824-1835. [PMID: 28982740 PMCID: PMC6145284 DOI: 10.1136/gutjnl-2016-313457] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 08/16/2017] [Accepted: 08/17/2017] [Indexed: 12/12/2022]
Abstract
OBJECTIVE This phase II, randomised, double-blind, placebo-controlled clinical trial was designed to evaluate the efficacy and safety of PF-00547659, a fully human monoclonal antibody that binds to human mucosal addressin cell adhesion molecule (MAdCAM) to selectively reduce lymphocyte homing to the intestinal tract, in patients with moderate-to-severe Crohn's disease (CD). DESIGN Eligible adults were aged 18-75 years, with active moderate-to-severe CD (Crohn's Disease Activity Index (CDAI) 220-450), a history of failure or intolerance to antitumour necrosis factor and/or immunosuppressive agents, high-sensitivity C reactive protein >3.0 mg/L and ulcers on colonoscopy. Patients were randomised to PF-00547659 22.5 mg, 75 mg or 225 mg or placebo. The primary endpoint was CDAI 70-point decrease from baseline (CDAI-70) at week 8 or 12. RESULTS In all, 265 patients were eligible for study entry. Although CDAI-70 response was not significantly different with placebo versus PF-00547659 treatment at weeks 8 or 12, remission rate was greater in patients with higher baseline C reactive protein (>5 mg/L vs >18.8 mg/L, respectively). Soluble MAdCAM decreased significantly from baseline to week 2 in a dose-related manner and remained low during the study in PF-00547659-treated patients. Circulating β7+ CD4+ central memory T-lymphocytes increased at weeks 8 and 12 with PF-00547659 treatment. No safety signal was seen. CONCLUSIONS Clinical endpoint differences between PF-00547659 and placebo did not reach statistical significance in patients with moderate-to-severe CD. PF-00547659 was pharmacologically active, as shown by a sustained dose-related decrease in soluble MAdCAM and a dose-related increase in circulating β7+ central memory T cells. TRIAL REGISTRATION NUMBER NCT01276509; Results.
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Affiliation(s)
- William J Sandborn
- Department of Medicine, Division of Gastroenterology, University of California San Diego, La Jolla, California, USA
| | - Scott D Lee
- Department of Medicine, Division of Gastroenterology, University of Washington, Seattle, Washington, USA
| | - Dino Tarabar
- Clinic of Gastroenterology and Hepatology, Military Medical Academy, Belgrade, Serbia
| | - Edouard Louis
- Department of Gastroenterology, University Hospital CHU of Liege, Liège, Belgium
| | - Maria Klopocka
- Department of Vascular Diseases and Internal Medicine, Nicolaus Copernicus University, Toruń, Collegium Medicum in Bydgoszcz, Poland
| | - Jochen Klaus
- Department of Medicine, Universitatsklinikum Ulm, Ulm, Germany
| | - Walter Reinisch
- Department of Medicine, Division of Gastroenterology, Medical University of Vienna, Vienna, Austria
- Division of Gastroenterology, Department of Medicine, McMaster University, Hamilton, Canada
| | - Xavier Hébuterne
- Department of Medicine, Université de Nice Sophia Antipolis, Hôpital de l'Archet, Nice, France
| | - Dong-Il Park
- Department of Internal Medicine, Division of Gastroenterology, Kangbuk Samsung Hospital, Sungkyunkwan University, Seoul, South Korea
| | | | | | - Alaa Ahmad
- Department of Gastroenterology, Pfizer, Cambridge, Massachusetts, USA
| | - Anindita Banerjee
- Department of Gastroenterology, Pfizer, Cambridge, Massachusetts, USA
| | - Lisa S Brown
- Department of Gastroenterology, Pfizer, Cambridge, Massachusetts, USA
| | - Fabio Cataldi
- Department of Gastroenterology, Pfizer, Cambridge, Massachusetts, USA
| | | | - John B Cheng
- Department of Gastroenterology, Pfizer, Cambridge, Massachusetts, USA
| | | | - Robert Clare
- Department of Gastroenterology, Pfizer, Cambridge, Massachusetts, USA
| | - Geert R D'Haens
- IBD Unit, Academic Medical Center, Amsterdam, The Netherlands
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Panda P, Nayak S, Bhakta S, Mohapatra S, Murthy TR. Design and synthesis of (Z/E)-2-phenyl/H-3-styryl-2H-chromene derivatives as antimicrotubule agents. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1520-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Griffiss J, Avery A, Nayak S, Friend D, Culwell K. Post hoc analysis of a randomized placebo-controlled pilot study on the effect of Amphora®, an acid-buffering vaginal gel, on vaginal pH by baseline vaginal pH level. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Das S, Nayak G, Nayak S. Osteogenesis imperfecta – a rare case report. J ANAT SOC INDIA 2018. [DOI: 10.1016/j.jasi.2018.06.180] [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: 10/28/2022]
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Bock M, Sierra C, Tan R, Shankel T, Nayak S, Fitts J, Chinnock R. Rituximab for the Treatment of Refractory EBV Viremia and Prevention of PTLD in Pediatric Heart Transplant Recipients. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.1019] [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: 10/17/2022] Open
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Nayak S, Sander O, Al-Huniti N, de Alwis D, Chain A, Chenel M, Sunkaraneni S, Agrawal S, Gupta N, Visser SAG. Getting Innovative Therapies Faster to Patients at the Right Dose: Impact of Quantitative Pharmacology Towards First Registration and Expanding Therapeutic Use. Clin Pharmacol Ther 2018; 103:378-383. [PMID: 29330855 PMCID: PMC5838712 DOI: 10.1002/cpt.978] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 11/28/2017] [Accepted: 12/04/2017] [Indexed: 12/16/2022]
Abstract
Quantitative pharmacology (QP) applications in translational medicine, drug‐development, and therapeutic use were crowd‐sourced by the ASCPT Impact and Influence initiative. Highlighted QP case studies demonstrated faster access to innovative therapies for patients through 1) rational dose selection for pivotal trials; 2) reduced trial‐burden for vulnerable populations; or 3) simplified posology. Critical success factors were proactive stakeholder engagement, alignment on the value of model‐informed approaches, and utilizing foundational clinical pharmacology understanding of the therapy.
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Affiliation(s)
| | | | - Nidal Al-Huniti
- Quantitative Clinical Pharmacology, AstraZeneca, Waltham, Massachusetts, USA
| | | | | | - Marylore Chenel
- Servier, Clinical Pharmacokinetics and Pharmacometrics, Suresnes, France
| | | | | | - Neeraj Gupta
- Millennium Pharmaceuticals, Inc., Cambridge, Massachusetts, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited
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Nayak S, Kataria A, Sharma MK, Rastogi A, Gupta E, Singh A, Tiwari SC. Hepatitis C Virus-associated Membranoproliferative Glomerulonephritis Treated with Directly Acting Antiviral Therapy. Indian J Nephrol 2018; 28:462-464. [PMID: 30647501 PMCID: PMC6309397 DOI: 10.4103/ijn.ijn_235_17] [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] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Hepatitis C virus (HCV) infection has been shown to affect kidneys with various histopathological pattern on the kidney biopsy. These commonly include a membranoproliferative glomerulonephritis (MPGN) pattern with mixed cryoglobulinemia (CG), thrombotic microangiopathy, membranous nephropathy, and vasculitis affecting medium and small vessels of the kidneys causing polyarteritis nodosa. It has been rarely associated with MPGN without detectable CG. We present one such patient who presented to us with HCV-associated MPGN without detectable CG, who recovered completely with directly acting antiviral therapy without any immunosuppression.
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Affiliation(s)
- S Nayak
- Department of Nephrology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - A Kataria
- Department of Nephrology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - M K Sharma
- Department of Hepatology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - A Rastogi
- Department of Pathology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - E Gupta
- Department of Virology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - A Singh
- Department of Nephrology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - S C Tiwari
- Department of Nephrology, Institute of Liver and Biliary Sciences, New Delhi, India
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Hassan-Zahraee M, Banerjee A, Cheng JB, Zhang W, Ahmad A, Page K, von Schack D, Zhang B, Martin SW, Nayak S, Reddy P, Xi L, Neubert H, Fernandez Ocana M, Gorelick K, Clare R, Vincent M, Cataldi F, Hung K. Anti-MAdCAM Antibody Increases ß7+ T Cells and CCR9 Gene Expression in the Peripheral Blood of Patients With Crohn's Disease. J Crohns Colitis 2018; 12:77-86. [PMID: 28961803 PMCID: PMC5881777 DOI: 10.1093/ecco-jcc/jjx121] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 09/01/2017] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To define pharmacodynamic biomarkers in the peripheral blood of patients with Crohn's disease [CD] after treatment with PF-00547659, an anti-human mucosal addressin cell adhesion molecule-1 [MAdCAM-1] monoclonal antibody. METHODS In this Phase 2, randomised, double-blind, controlled study [OPERA], blood samples were analysed from patients with moderate to severe active CD who received placebo or 22.5 mg, 75 mg, or 225 mg of PF-00547659 subcutaneously at baseline and at Weeks 4 and 8, with follow-up at Week 12. Soluble MAdCAM [sMAdCAM] was measured by mass spectrometry, β7-expressing T cells by flow cytometry, and gene transcriptome by RNA sequencing. RESULTS A slight increase in sMAdCAM was measured in the placebo group from baseline to Week 12 [6%], compared with significant decreases in all PF-00547659 groups [-87% to -98%]. A slight increase from baseline to Week 12 was observed in frequency and molecules of equivalent soluble fluorochrome for β7+ central memory T cells in the placebo group [4%], versus statistically significant increases in the active treatment groups [48% to 81%]. Similar trends were seen for β7+ effector memory T cells [placebo, 8%; PF-00547659, 84-138%] and β7+ naïve T cells [8%; 13-50%]. CCR9 gene expression had statistically significant up-regulation [p = 1.09e-06; false discovery rate < 0.1] with PF-00547659 treatment, and was associated with an increase in β7+ T cells. CONCLUSIONS Results of the OPERA study demonstrate positive pharmacology and dose-dependent changes in pharmacodynamic biomarker measurements in blood, including changes in cellular composition of lymphocytes and corresponding CCR9 gene expression changes.
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Affiliation(s)
- Mina Hassan-Zahraee
- Pfizer Inc., Cambridge, MA, USA,Corresponding Author: Mina Hassan-Zahraee, PhD, Pfizer Inc., 610 Main Street, Cambridge, MA 02139, USA. Tel.: 1 781-799-8694; fax: 973-660-8096;
| | | | | | | | | | | | | | | | | | | | | | - Li Xi
- Pfizer Inc., Cambridge, MA, USA
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Nayak S, Sharma M, Kataria A, Tiwari SC, Rastogi A, Mukund A. Cholemic Nephrosis from Acute Hepatitis E Virus Infection: A Forgotten Entity? Indian J Nephrol 2018; 28:250-251. [PMID: 29962682 PMCID: PMC5998717 DOI: 10.4103/ijn.ijn_168_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- S Nayak
- Department of Nephrology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - M Sharma
- Department of Hepatology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - A Kataria
- Department of Nephrology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - S C Tiwari
- Department of Nephrology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - A Rastogi
- Department of Pathology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - A Mukund
- Department of Radiology, Institute of Liver and Biliary Sciences, New Delhi, India
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Sahoo AK, Das JK, Nayak S. Isolation, culture, characterization, and osteogenic differentiation of canine endometrial mesenchymal stem cell. Vet World 2017; 10:1533-1541. [PMID: 29391698 PMCID: PMC5771182 DOI: 10.14202/vetworld.2017.1533-1541] [Citation(s) in RCA: 9] [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: 08/03/2017] [Accepted: 12/04/2017] [Indexed: 01/09/2023] Open
Abstract
Aim In this study, the canine endometrium tissue is characterized for its stem cell properties such as adherence to tissue culture plate (plasticity), short population doubling time, serial clonal passaging, long-term culturing properties, stem cell marker expression, and multilineage differentiation potential. Materials and Methods The present work describes a novel isolation protocol for obtaining mesenchymal stem cells from the uterine endometrium and is compared with cells derived from umbilical cord matrix as a positive control. These cells are clonogenic, can undergo several population doublings in vitro, and can be differentiated to the osteocytes in mature mesenchymal tissues when grown in osteogenic differentiation media as detected by Alizarin Red-S staining. Results It is reported for the first time that the cells derived from the canine endometrium (e-multipotent stem cells [MSCs]) were able to differentiate into a heterologous cell type: Osteocytes, thus demonstrating the presence of MSCs. Thus, the endometrium may be told as a potential source of MSCs which can be used for various therapeutic purposes. Conclusion The endometrium can be used as a potential source of MSCs, which can be used for various therapeutic purposes.
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Affiliation(s)
- A K Sahoo
- Department of Veterinary Surgery and Radiology, College of Veterinary Science and Animal Husbandry, OUAT, Bhubaneswar - 751 003, Odisha, India
| | - J K Das
- Department of Veterinary Surgery and Radiology, College of Veterinary Science and Animal Husbandry, OUAT, Bhubaneswar - 751 003, Odisha, India
| | - S Nayak
- Department of Veterinary Surgery and Radiology, College of Veterinary Science and Animal Husbandry, OUAT, Bhubaneswar - 751 003, Odisha, India
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Rogers KV, Bhattacharya I, Martin SW, Nayak S. Know Your Variability: Challenges in Mechanistic Modeling of Inflammatory Response in Inflammatory Bowel Disease (IBD). Clin Transl Sci 2017; 11:4-7. [PMID: 28986961 PMCID: PMC5759729 DOI: 10.1111/cts.12503] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 08/16/2017] [Indexed: 12/15/2022] Open
Affiliation(s)
- Katharine V Rogers
- Clinical Pharmacology, Early Clinical Development, Pfizer Inc., Groton, Connecticut, USA
| | - Indranil Bhattacharya
- Clinical Pharmacology, Early Clinical Development, Pfizer Inc., Groton, Connecticut, USA
| | - Steven W Martin
- Pharmacometrics, Global Innovative Pharma Business (GIPB), Pfizer Inc., Groton, Connecticut, USA
| | - Satyaprakash Nayak
- Pharmacometrics, Global Innovative Pharma Business (GIPB), Pfizer Inc., Groton, Connecticut, USA
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Culwell K, Griffiss M, Nayak S, Avery A, Friend D. A randomized, placebo-controlled pilot study to determine the effect and duration of acidform gel (AMPHORA) on vaginal pH. Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.161] [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: 11/29/2022]
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42
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Gupta Y, Ajithkumar B, Kale HS, Nayak S, Sabhapathy S, Sureshkumar S, Swami RV, Chengalur JN, Ghosh SK, Ishwara-Chandra CH, Joshi BC, Kanekar N, Lal DV, Roy S. The Upgraded GMRT:Opening New Windows on the Radio Universe. CURR SCI INDIA 2017. [DOI: 10.18520/cs/v113/i04/707-714] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Mukhi P, Mohapatra SS, Bhattacharjee M, Ray KK, Muraleedharan TS, Arun A, Sathyavathi R, Juluri RR, Satyam PV, Panda AK, Biswas A, Nayak S, Bojja S, Pratihar S, Roy S. Mercury based drug in ancient India: The red sulfide of mercury in nanoscale. J Ayurveda Integr Med 2017; 8:93-98. [PMID: 28600164 PMCID: PMC5497007 DOI: 10.1016/j.jaim.2017.01.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 10/07/2016] [Revised: 01/24/2017] [Accepted: 01/27/2017] [Indexed: 11/26/2022] Open
Abstract
Mercury is one of the elements which had attracted the attention of the chemists and physicians of ancient India and China. Among the various metal based drugs which utilize mercury, we became interested in the red sulfide of mercury which is known in ancient Indian literature as rasasindur (alias rasasindura, rasasindoor, rasasinduram, sindur, or sindoor) and is used extensively in various ailments and diseases. Following various physico-chemical characterizations it is concluded that rasasindur is chemically pure α-HgS with Hg:S ratio as 1:1. Analysis of rasasindur vide Transmission Electron Microscopy (TEM) showed that the particles are in nanoscale. Bio-chemical studies of rasasindur were also demonstrated. It interacts with Bovine Serum Albumin (BSA) with an association constant of (9.76 ± 0.56) × 103 M−1 and behaves as a protease inhibitor by inhibiting the proteolysis of BSA by trypsin. It also showed mild antioxidant properties.
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Affiliation(s)
- Priyabrata Mukhi
- School of Basic Sciences, Indian Institute of Technology, Bhubaneswar 751007, India
| | | | - M Bhattacharjee
- Chemistry Department, Indian Institute of Technology, Kharagpur 721302, India
| | - K K Ray
- Metallurgical & Materials Engineering Department, Indian Institute of Technology, Kharagpur 721302, India
| | | | - A Arun
- Arya Vaidya Sala, Kottakkal 676503, Kerala, India
| | - R Sathyavathi
- School of Physics, University of Hyderabad, Hyderabad 500046, India
| | - R R Juluri
- Institute of Physics, Bhubaneswar 751005, India
| | - P V Satyam
- Institute of Physics, Bhubaneswar 751005, India
| | - Alok K Panda
- School of Basic Sciences, Indian Institute of Technology, Bhubaneswar 751007, India
| | - Ashis Biswas
- School of Basic Sciences, Indian Institute of Technology, Bhubaneswar 751007, India
| | - S Nayak
- School of Basic Sciences, Indian Institute of Technology, Bhubaneswar 751007, India
| | | | - S Pratihar
- Department of Chemical Sciences, Tezpur University, 784028, India
| | - Sujit Roy
- School of Basic Sciences, Indian Institute of Technology, Bhubaneswar 751007, India.
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Kumar A, Nayak S, Pathak P, Purkait S, Suri V, Sharma MC, Mukhopadhyay A, Suri A, Sarkar C. P01.27 Repressive histone marks (H3K27me3) and DNA hypermethylation suggests epigenetic regulation of miR-379/miR-410 (C14MC) cluster in oligodendrogliomas. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.103] [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: 11/14/2022] Open
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Sarkar C, Kumar A, Pathak P, Purkait S, Nayak S, Faruq M, Suri V, Sharma MC, Suri A. P03.22 BRAF, FGFR1 and PDGFRA alterations in oligodendrogliomas - correlation with MAPK/mTOR pathway activation. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.137] [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: 11/12/2022] Open
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46
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Saraf KK, Kumaresan A, Nayak S, Chhillar S, Sreela L, Kumar S, Tripathi UK, Datta TK, Mohanty TK. Development of an in vitro oviduct epithelial explants model for studying sperm-oviduct binding in the buffalo. Reprod Domest Anim 2017; 52:687-691. [DOI: 10.1111/rda.12952] [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: 10/02/2016] [Accepted: 02/07/2017] [Indexed: 12/01/2022]
Affiliation(s)
- KK Saraf
- Theriogenology Lab; Animal Reproduction, Gynaecology & Obstetrics; National Dairy Research Institute; Karnal Haryana India
| | - A Kumaresan
- Theriogenology Lab; Animal Reproduction, Gynaecology & Obstetrics; National Dairy Research Institute; Karnal Haryana India
| | - S Nayak
- Theriogenology Lab; Animal Reproduction, Gynaecology & Obstetrics; National Dairy Research Institute; Karnal Haryana India
| | - S Chhillar
- Theriogenology Lab; Animal Reproduction, Gynaecology & Obstetrics; National Dairy Research Institute; Karnal Haryana India
| | - L Sreela
- Theriogenology Lab; Animal Reproduction, Gynaecology & Obstetrics; National Dairy Research Institute; Karnal Haryana India
| | - S Kumar
- Theriogenology Lab; Animal Reproduction, Gynaecology & Obstetrics; National Dairy Research Institute; Karnal Haryana India
| | - UK Tripathi
- Theriogenology Lab; Animal Reproduction, Gynaecology & Obstetrics; National Dairy Research Institute; Karnal Haryana India
| | - TK Datta
- Animal Biotechnology Centre; National Dairy Research Institute; Karnal Haryana India
| | - TK Mohanty
- Artificial Breeding Research Centre; National Dairy Research Institute; Karnal Haryana India
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Rajak S, Kumaresan A, Attupuram N, Chhillar S, Baithalu R, Nayak S, Sreela L, Singh RK, Tripathi U, Mohanty T, Yadav S. Age-related changes in transcriptional abundance and circulating levels of anti-Mullerian hormone and Sertoli cell count in crossbred and Zebu bovine males. Theriogenology 2017; 89:1-8. [DOI: 10.1016/j.theriogenology.2016.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 09/27/2016] [Accepted: 10/03/2016] [Indexed: 02/01/2023]
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Desai KT, Patel F, Patel PB, Nayak S, Patel NB, Bansal RK. A case-control study of epidemiological factors associated with leptospirosis in South Gujarat region. J Postgrad Med 2017; 62:223-227. [PMID: 27763478 PMCID: PMC5105206 DOI: 10.4103/0022-3859.188551] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND The current study was planned to identify the epidemiological factors associated with leptospirosis in South Gujarat region using neighborhood controls. METHODS A total of 100 cases of leptospirosis occurred in South Gujarat region during the year 2012 were selected using simple random sampling. Three neighbors of the selected cases formed the controls (n = 300). A pretested structured questionnaire was used for data collection and data were analyzed using Epi Info 2007. RESULTS There was significant association of illiteracy (odds ratio [OR] =1.82, 95% confidence interval [CI] =1.14-2.89), working in waterlogged fields during the reference season (OR = 4.6, 95% CI = 1.6-17.9), swimming/bathing in canals, open air defecation practices, storage of cow dung in or surrounding house, residence in the house made up of cow dung walls, households with access of food to rodents, injuries over hands/foot during the endemic season (OR = 3, 95% CI = 1.8-4.8), and history of skin disease during the endemic season (OR = 4.2, 95% CI = 2-8.5), with leptospirosis. Only 10% of individuals had gumboots for protection. A total of 83 (83%) cases and 240 (80%) controls had taken oral doxycycline chemoprophylaxis (P > 0.05). Cases had taken chemoprophylaxis for a median 4 weeks (range: 1-8) while controls had taken the same for median 8 weeks (range = 1-8) (P < 0.002). CONCLUSIONS Although the commonly established factors appear to be associated with leptospirosis, the role of host factors seems to play a more important role in determining susceptibility to leptospirosis in exposed individuals.
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Affiliation(s)
- K T Desai
- Department of Community Medicine, Surat Municipal Institute of Medical Education and Research, Surat, Gujarat, India
| | - F Patel
- Department of Community Medicine, Surat Municipal Institute of Medical Education and Research, Surat, Gujarat, India
| | - P B Patel
- Department of Community Medicine, Surat Municipal Institute of Medical Education and Research, Surat, Gujarat, India
| | - S Nayak
- Department of Community Medicine, Surat Municipal Institute of Medical Education and Research, Surat, Gujarat, India
| | - N B Patel
- Department of Community Medicine, Surat Municipal Institute of Medical Education and Research, Surat, Gujarat, India
| | - R K Bansal
- Department of Community Medicine, Surat Municipal Institute of Medical Education and Research, Surat, Gujarat, India
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Lee D, Nayak S, Martin SW, Heatherington AC, Vicini P, Hua F. A quantitative systems pharmacology model of blood coagulation network describes in vivo biomarker changes in non-bleeding subjects. J Thromb Haemost 2016; 14:2430-2445. [PMID: 27666750 DOI: 10.1111/jth.13515] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 02/23/2016] [Accepted: 09/01/2016] [Indexed: 01/03/2023]
Abstract
Essentials Baseline coagulation activity can be detected in non-bleeding state by in vivo biomarker levels. A detailed mathematical model of coagulation was developed to describe the non-bleeding state. Optimized model described in vivo biomarkers with recombinant activated factor VII treatment. Sensitivity analysis predicted prothrombin fragment 1 + 2 and D-dimer are regulated differently. SUMMARY Background Prothrombin fragment 1 + 2 (F1 + 2 ), thrombin-antithrombin III complex (TAT) and D-dimer can be detected in plasma from non-bleeding hemostatically normal subjects or hemophilic patients. They are often used as safety or pharmacodynamic biomarkers for hemostatis-modulating therapies in the clinic, and provide insights into in vivo coagulation activity. Objectives To develop a quantitative systems pharmacology (QSP) model of the blood coagulation network to describe in vivo biomarkers, including F1 + 2 , TAT, and D-dimer, under non-bleeding conditions. Methods The QSP model included intrinsic and extrinsic coagulation pathways, platelet activation state-dependent kinetics, and a two-compartment pharmacokinetics model for recombinant activated factor VII (rFVIIa). Literature data on F1 + 2 and D-dimer at baseline and changes with rFVIIa treatment were used for parameter optimization. Multiparametric sensitivity analysis (MPSA) was used to understand key proteins that regulate F1 + 2 , TAT and D-dimer levels. Results The model was able to describe tissue factor (TF)-dependent baseline levels of F1 + 2 , TAT and D-dimer in a non-bleeding state, and their increases in hemostatically normal subjects and hemophilic patients treated with different doses of rFVIIa. The amount of TF required is predicted to be very low in a non-bleeding state. The model also predicts that these biomarker levels will be similar in hemostatically normal subjects and hemophilic patients. MPSA revealed that F1 + 2 and TAT levels are highly correlated, and that D-dimer is more sensitive to the perturbation of coagulation protein concentrations. Conclusions A QSP model for non-bleeding baseline coagulation activity was established with data from clinically relevant in vivo biomarkers at baseline and changes in response to rFVIIa treatment. This model will provide future mechanistic insights into this system.
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Affiliation(s)
- D Lee
- PharmaTherapeutics Clinical Research, Pfizer Inc., Cambridge, MA, USA
| | - S Nayak
- Pharmacometrics, Global Innovative Pharma Business, Pfizer Inc., Cambridge, MA, USA
| | - S W Martin
- Pharmacometrics, Global Innovative Pharma Business, Pfizer Inc., Cambridge, MA, USA
| | - A C Heatherington
- PharmaTherapeutics Clinical Research, Pfizer Inc., Cambridge, MA, USA
| | - P Vicini
- Pharmacokinetics, Dynamics and Metabolism - New Biological Entities, Pfizer Inc., San Diego, CA, USA
| | - F Hua
- PharmaTherapeutics Clinical Research, Pfizer Inc., Cambridge, MA, USA
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Satyam L, Poddutoori R, Mukherjee S, Marappan S, Gopinath S, Pothuganti M, Nayak S, Kaza L, Nandish C, Amith A, Ravindra M, Nagaraju A, Antony T, Pandit C, Chelur S, Daginakatte G, Samajdar S, Ramachandra M. Potent and selective inhibition of CDK7 by novel covalent inhibitors. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32978-1] [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: 11/30/2022]
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