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Affrald R J, Narayan S. Anti-Aging Strategies And Topical Delivery Of Biopolymer-Based Nanocarriers For Skin Cancer Treatment. Curr Aging Sci 2023:CAS-EPUB-130247. [PMID: 36941817 DOI: 10.2174/1874609816666230320122018] [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: 08/03/2022] [Revised: 01/07/2023] [Accepted: 01/23/2023] [Indexed: 03/23/2023]
Abstract
BACKGROUND Environmental factors like UV radiation and epigenetic changes are one of the major factors for skin cancer that triggers aging. This review provides basic information on cancer development with respect to aging the receptors involved and the therapeutic targets. OBJECTIVE Biopolymers like polysaccharide, polyphenols, proteins, nucleic acid plays a vital role in regulation of normal cell homeostasis. It is therefore pertinent to explore the role of biopolymers as antiaging formulations and also the possibility of these formulations used against cancer via topical administrations. METHODS As UV radiation is one of the predominant factor in causing skin cancer the association of receptors between aging and cancer indicated that insulin receptor, melatonin receptor, toll like receptor, sirtuin 1 receptor, tumor specific T cell receptor and mitochondria based targeting can be used to direct therapeutics for suppression of cancer and prevent aging. RESULTS Biopolymer based nanoformulations have tremendously progressed by entrapment of drugs like curcumin, resveratrol which can prevent cancer and aging in a similar mechanism. CONCLUSION Certain protein signalling or calcium and ROS signalling pathways are different for cancer and aging process. The involvement of mitochondrial DNA mutation along with telomere shortening with a change in cellular energetics leading to genomic instability in aging process can also induce mitochondrial dysfunction and epigenetic alterations leading to skin cancer. Therefore, the use of biopolymers as a topical supplement during aging process can result in the prevention of cancer.
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Affiliation(s)
- Jino Affrald R
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamil Nadu, 603103, India
| | - Shoba Narayan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamil Nadu, 603103, India
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R JA, Narayan S. A Systematic Review of Different Classes of Biopolymers and Their Use as Antimicrobial Agents. Russ J Bioorg Chem 2023. [DOI: 10.1134/s1068162023020103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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3
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Mell L, Torres-Saavedra P, Wong S, Chang S, Kish J, Minn A, Jordan R, Liu T, Truong M, Winquist E, Wise-Draper T, Rodriguez C, Musaddiq A, Beadle B, Henson C, Narayan S, Spencer S, Harris J, Yom S. Radiotherapy with Durvalumab vs. Cetuximab in Patients with Locoregionally Advanced Head and Neck Cancer and a Contraindication to Cisplatin: Phase II Results of NRG-HN004. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.09.003] [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: 11/16/2022]
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Palaniraj S, Murugesan R, Narayan S. Aprotinin – Conjugated biocompatible porous nanocomposite for dentine remineralization and biofilm degradation. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100702] [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: 11/25/2022]
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5
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Lazer LM, Kesavan Y, Gor R, Ramachandran I, Pathak S, Narayan S, Anbalagan M, Ramalingam S. Targeting colon cancer stem cells using novel doublecortin like kinase 1 antibody functionalized folic acid conjugated hesperetin encapsulated chitosan nanoparticles. Colloids Surf B Biointerfaces 2022; 217:112612. [PMID: 35738074 DOI: 10.1016/j.colsurfb.2022.112612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 05/25/2022] [Accepted: 06/02/2022] [Indexed: 01/05/2023]
Abstract
The cancer stem cell (CSC) hypothesis is an evolving oncogenesis concept. CSCs have a distinct ability to self-renew themselves and also give rise to a phenotypically diverse population of cells. Targeting CSCs represents a promising strategy for cancer treatment. Plant-derived compounds are potent in restricting the expansion of CSCs. DCLK1 has been already reported as a colon CSC specific marker. Nanoparticles can effectively inhibit multiple types of CSCs by targeting specific markers. We have synthesized DCLK1 functionalized folic acid conjugated hesperetin encapsulated chitosan nanoparticles (CFH-DCLK1), specifically to target CSCs. In this regard, we have performed proliferation assay, colony formation assay, cell migration assay, apoptosis assay, flow cytometry analysis, real-time RT- PCR and western blot analyses to determine the effect of CFH-DCLK1 and CFH nanoparticles in HCT116-colon cancer cells. In our study, we have determined the median inhibitory concentration (IC50) of CFH (47.8 µM) and CFH-DCLK1 (4.8 µM) nanoparticles in colon cancer cells. CFH-DCLK1 nanoparticles induced apoptosis and inhibited the migration and invasion of colon cancer cells. Real time PCR and western blot results have demonstrated that the treatment with CFH-DCLK1 nanoparticles significantly reduced the expression of CSC markers such as DCLK1, STAT1 and NOTCH1 compared to the CFH alone in HCT116 colon cancer cells. Finally, in the 3D spheroid model, CFH-DCLK1 nanoparticles significantly inhibited the colonosphere growth. Overall, our results highlight the effectiveness of CFH-DCLK1 nanoparticles in targeting the colon cancer cells and CSCs. This study would lead to the development of therapies targeting both cancer cells and CSCs simultaneously using nanoformulated drugs, which could bring changes in the current cancer treatment strategies.
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Affiliation(s)
- Lizha Mary Lazer
- Department of Genetic Engineering, School of Bio-Engineering, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram 603203, Tamil Nadu, India
| | - Yasodha Kesavan
- Department of Genetic Engineering, School of Bio-Engineering, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram 603203, Tamil Nadu, India
| | - Ravi Gor
- Department of Genetic Engineering, School of Bio-Engineering, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram 603203, Tamil Nadu, India
| | - Ilangovan Ramachandran
- Department of Endocrinology, Dr. ALM PG Institute of Basic Medical Sciences, University of Madras, Taramani Campus, Chennai 600113, Tamil Nadu, India
| | - Surajit Pathak
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, 603103, India
| | - Shoba Narayan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, 603103, India
| | - Muralidharan Anbalagan
- Structural & Cellular Biology, Pre-clinical small animal Imaging Facility, Tulane University School of Medicine, New Orleans, Louisiana, 70112, USA
| | - Satish Ramalingam
- Department of Genetic Engineering, School of Bio-Engineering, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram 603203, Tamil Nadu, India.
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Joga S, Goyal S, Mehta A, Sharma M, Koyyala V, Doval D, Goyal P, Aggarwal C, M. swamy, Patel A, Nathani S, Suryavanshi M, Narayan S, Soni S, Jain A, Redhu P. P-21 Molecular subtypes (profile) of colorectal cancer and their correlation with clinical and pathological profile in a tertiary care centre in India. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.112] [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: 11/01/2022] Open
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7
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Deb B, Selvalingam A, Alhusseini M, Rogers A, Ganesan P, Feng R, Clopton P, Ruiperez-Campillo S, Narayan S. Machine-learned physiological signatures from the ECG predict sudden death in ischemic cardiomyopathy. Europace 2022. [DOI: 10.1093/europace/euac053.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): National Institute of Health (NIH)
Background
Low left ventricular ejection fraction (LVEF) is an imperfect predictor of sudden cardiac death (SCD) in patients with ischemic cardiomyopathy. Novel features from the ECG might provide a readily available tool to better predict risk.
Purpose
We hypothesized that machine learning (ML) of the ECG can be used to predict SCD, and the ML-learned ECG features could be referenced to interpretable intracardiac signals (monophasic action potentials: MAP) to provide mechanistic insights.
Methods
We studied 5603 ECG Lead V1 beats in 41 patients (64±10 Y) with coronary disease and LVEF≤40% in steady-state pacing. Patients were randomly allocated to independent training and test cohorts in a 70:30 ratio, repeated K=10-fold. Support vector machines were trained to predict mortality at 3Y from the top 20 features derived from these beats. Patient-level predictions were made by computing an ECG score that indicates the proportion of test set beats in that patient computed by the beat-level model to predict death. Explainability analysis was performed using the arithmetic mean of MAP and ECG beats that predicted SCD versus those that predicted survival.
Results
Fig 1A. shows ECG lead V1 and MAP in a 79 Y man with LVEF 29%. Fig 1B shows the dataflow in the study. Predictive accuracies of ML models were 78 and 70% and optimal with 20 features for both ECG and MAP models respectively (Fig. 1C). Beat-level predictions in the validation (n=1678 Lead I beats) cohorts yielded c-statistics of 0.78 with the ECG (95% CI, 0.62–0.91) and 0.75 with MAPs (95% CI, 0.75-0.76) (data not shown). In multivariable patient-level models, c-statistic was 0.87 with ECGs (95% CI, 0.76-0.98) (Fig 1D) and 0.82 with MAPs. On explainability analysis, ECG beats that predicted SCD (Fig 2; red) had lower amplitude and more notched T-waves in lead V1 than beats that predicted no SCD (Fig 2; blue). MAP that predicted SCD had higher repolarization current at the same time points. Both QT duration (ECG) and action potential duration (MAP) did not differ (Fig 2).
Conclusions
Machine learning of the ECG reveals novel predictors of SCD risk in patients with ischemic cardiomyopathy analogous to those identified in intracardiac signals. This approach can be used as a point-of-care ECG risk tool to improve risk stratification and allocation for ICD therapy beyond LVEF alone and may shed insights into the pathophysiology of ventricular arrhythmias.
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Affiliation(s)
- B Deb
- Stanford University School of Medicine, Cardiology, Palo Alto, United States of America
| | - A Selvalingam
- Stanford University School of Medicine, Cardiology, Palo Alto, United States of America
| | - M Alhusseini
- Stanford University School of Medicine, Cardiology, Palo Alto, United States of America
| | - A Rogers
- Stanford University School of Medicine, Cardiology, Palo Alto, United States of America
| | - P Ganesan
- Stanford University School of Medicine, Cardiology, Palo Alto, United States of America
| | - R Feng
- Stanford University School of Medicine, Cardiology, Palo Alto, United States of America
| | - P Clopton
- Stanford University School of Medicine, Cardiology, Palo Alto, United States of America
| | - S Ruiperez-Campillo
- Stanford University School of Medicine, Cardiology, Palo Alto, United States of America
| | - S Narayan
- Stanford University School of Medicine, Cardiology, Palo Alto, United States of America
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Narayan S, Pietrusz A, Allen J, Docherty K, Emery N, Ennis M, Flesher R, Foo W, Freebody J, Gallagher E, Grose N, Harris D, Hewamadduma C, Holmes S, James M, Maidment L, Mayhew A, Moat D, Moorcroft N, Muni-Lofra R, Nevin K, Quinlivan R, Sodhi J, Stuart D, White N, Yvonne J. Adult North Star Network (ANSN): Consensus Document for Therapists Working with Adults with Duchenne Muscular Dystrophy (DMD) - Therapy Guidelines. J Neuromuscul Dis 2022; 9:365-381. [PMID: 35124658 DOI: 10.3233/jnd-210707] [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] [Indexed: 11/15/2022]
Affiliation(s)
- S Narayan
- University Hospital Southampton NHS Foundation Trust, Southampton SO16 6YD, UK
| | - A Pietrusz
- UCL Queen Square Institute of Neurology, MRC Centre for Neuromuscular Diseases, UK
| | - J Allen
- Neuromuscular Complex Care Centre (NMCCC), National Hospital for Neurology and Neurosurgery, UK
| | - K Docherty
- University Hospitals Dorset NHS Foundation Trust, UK
| | - N Emery
- The Robert Jones and Agnes Hunt Orthopaedic Hospital, UK
| | - M Ennis
- The Walton Centre NHS Foundation Trust, UK
| | - R Flesher
- The Walton Centre NHS Foundation Trust, UK
| | - W Foo
- Manchester University NHS Foundation Trust, UK
| | - J Freebody
- John Radcliffe Hospital -OxfordUniversity Hospitals NHS Foundation Trust, UK
| | | | - N Grose
- North Bristol NHS Foundation Trust, The South West Neuromuscular Operational Delivery Network (SWNODN), UK
| | - D Harris
- West Midlands Rehabilitation Centre, Birmingham Community Healthcare NHS Foundation Trust, UK
| | - C Hewamadduma
- Sheffield Teaching Hospitals NHS Foundation Trust, UK.,Sheffield Institute for Translational Neurosciences (SITRAN), University of Sheffield, UK
| | - S Holmes
- MRC Centre for Neuromuscular Diseases, National Hospital for Neurology and Neurosurgery, UK
| | - M James
- The John Walton Muscular Dystrophy Research Centre, Newcastle, UK
| | - L Maidment
- Sheffield Teaching Hospitals NHS Foundation Trust, UK
| | - A Mayhew
- The John Walton Muscular Dystrophy Research Centre, Newcastle, UK
| | - D Moat
- The John Walton Muscular Dystrophy Research Centre, Newcastle, UK
| | - N Moorcroft
- West Midlands Rehabilitation Centre, Birmingham Community Healthcare NHS Foundation Trust, UK
| | - R Muni-Lofra
- The John Walton Muscular Dystrophy Research Centre, Newcastle, UK
| | - K Nevin
- Sheffield Teaching Hospitals NHS Foundation Trust, UK
| | - R Quinlivan
- UCL Queen Square Institute of Neurology, MRC Centre for Neuromuscular Diseases, UK
| | - J Sodhi
- The John Walton Muscular Dystrophy Research Centre, Newcastle, UK
| | | | - N White
- The Robert Jones and Agnes Hunt Orthopaedic Hospital, UK
| | - J Yvonne
- University Hospitals of Leicester Emergency and Specialist Medicine, UK
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Williams T, Moughan J, Ben-Josef E, Regine W, Timmers C, Robb R, DiPetrillo T, Leasure N, Mowat R, Kim H, Koenig J, Narayan S, Bush D, Fromm M, Guha C. High SMAD4 Expression is Associated With Better Clinical Outcomes in Patients With Resectable Pancreatic Cancer: An Analysis of NRG Oncology/RTOG 9704. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.327] [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: 11/28/2022]
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10
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Nagaraj S, Manivannan S, Narayan S. Potent antifungal agents and use of nanocarriers to improve delivery to the infected site: A systematic review. J Basic Microbiol 2021; 61:849-873. [PMID: 34351655 DOI: 10.1002/jobm.202100204] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 07/29/2021] [Accepted: 08/01/2021] [Indexed: 01/30/2023]
Abstract
There are four major classes of antifungals with the predominant mechanism of action being targeting of cell wall or cell membrane. As in other drugs, low solubility of these compounds has led to low bioavailability in target tissues. Enhanced drug dosages have effects such as toxicity, drug-drug interactions, and increased drug resistance by fungi. This article reviews the current state-of-the-art of antifungals, structure, mechanism of action, other usages, and toxic side effects. The emergence of nanoformulations to transport and uniformly release cargo at the target site is a boon in antifungal treatment. The article details research that lead to the development of nanoformulations of antifungals and potential advantages and avoidance of the lacunae characterizing conventional drugs. A range of nanoformulations based on liposomes, polymers are in various stages of research and their potential advantages have been brought out. It could be observed that under similar dosages, test models, and duration, nanoformulations provided enhanced activity, reduced toxicity, higher uptake and higher immunostimulatory effects. In most instances, the mechanism of antifungal activity of nanoformulations was similar to that of regular antifungal. There are possibilities of coupling multiple antifungals on the same nano-platform. Increased activity coupled with multiple mechanisms of action presents for nanoformulations a tremendous opportunity to overcome antifungal resistance. In the years to come, robust methods for the preparation of nanoformulations taking into account the repeatability and reproducibility in action, furthering the studies on nanoformulation toxicity and studies of human models are required before extensive use of nanoformulations as a prescribed drug.
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Affiliation(s)
- Saraswathi Nagaraj
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Chennai, Tamilnadu, India
| | - Sivakami Manivannan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Chennai, Tamilnadu, India
| | - Shoba Narayan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Chennai, Tamilnadu, India
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Ganesan P, Bhatia N, Rogers AJ, Krummen D, Wang P, Clopton P, Rappel WJ, Narayan S. Extent of atrium with 1:1 electrogram activation predicts response to ablation of atrial fibrillation. Europace 2021. [DOI: 10.1093/europace/euab116.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): US National Institutes of Health
Background
Mechanisms associated with successful termination of persistent atrial fibrillation (AF) are still under debate. We sought to study the association between spatial extent of atrium with organized conduction and AF ablation success. We hypothesized that patients with large areas of atrium having 1:1 electrogram activation akin to ‘atrial tachycardia’ may have a higher likelihood of AF termination by ablation.
Methods
In n = 40 AF patients, n = 20 had termination by ablation ("Term"), and the remaining did not have AF termination by ablation ("Non-term"). Basket catheters (64 poles) were used to record unipolar electrograms (EGMs) in one or both atrium. Ablation targeted localized rotational/focal regions, after which pulmonary vein isolation was performed. Unipolar EGMs of 4sec duration at each 2x2 electrode neighborhood within 8x8 catheter grid were processed using a statistical correlation technique to identify the duration of 1:1 activations. Any EGM activation cycle that had a correlation above 80% was considered to be 1:1. Duration of contiguous 1:1 cycles was determined as percentage of total duration (4 sec).
Results
Spatial area of atrium (percentage of mapping field) and the corresponding 1:1 durations were assessed for patients in Term and Non-term groups. Fig A shows spatial 1:1 maps of a Term and a Non-term patient. Fig B shows examples of 1:1 and non-1:1 EGMs. Patients in Term group had higher average 1:1 atrial area than non-term group for any 1:1 duration (Fig C, 15 ± 22% vs 2 ± 4% with ≥70% 1:1 duration, p = 0.03). Positive and negative predictive values of duration≥70% for AF termination were 64.7%, and 75%, with specificity 60% and sensitivity 78.6%, exceeding clinical risk scores.
Conclusion
Persistent AF atrium shows areas of organized 1:1 conduction. Larger 1:1 atrial areas were identified in patients in whom AF terminated by ablation. Future studies should investigate mechanistic bases of organized conduction in AF. Abstract Figure.
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Affiliation(s)
- P Ganesan
- Stanford University School of Medicine, Palo Alto, United States of America
| | - N Bhatia
- Emory University, Atlanta, United States of America
| | - AJ Rogers
- Stanford University School of Medicine, Palo Alto, United States of America
| | - D Krummen
- University of California San Diego, San Diego, United States of America
| | - P Wang
- Stanford University School of Medicine, Palo Alto, United States of America
| | - P Clopton
- Stanford University School of Medicine, Palo Alto, United States of America
| | - WJ Rappel
- University of California San Diego, San Diego, United States of America
| | - S Narayan
- Stanford University School of Medicine, Palo Alto, United States of America
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Wang W, Kong F, Hu C, Jin J, Machtay M, Bogart J, Garces I, Narayan S, Robinson C, Kavadi V, Rothman J, Koprowski C, Gore E, Welsh J, Gaur R, Macrae R, Cannon G, Bradley J, Lu B. MA13.01 A Validation Study on DNA Repair Gene Variant for Lung Cancer Survival Prediction after Chemoradiation: A Secondary Analysis for RTOG-0617 Study. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.263] [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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13
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Batra U, Sharma M, Nathany S, Soni S, Jain A, Narayan S, Singh H, Jain P, Mehta A. P37.06 Are all ALK Gene Rearrangements Created Equal?? J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.753] [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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Batra U, Sharma M, Narayan S, Nathany S. 418P All EGFR mutations are (not) created equal: Focus on uncommon EGFR mutations. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.412] [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: 11/25/2022] Open
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Rachel K, Pathak S, Moorthi A, Narasimhan S, Murugesan R, Narayan S. 5-Azacytidine incorporated polycaprolactone-gelatin nanoscaffold as a potential material for cardiomyocyte differentiation. Journal of Biomaterials Science, Polymer Edition 2019; 31:123-140. [DOI: 10.1080/09205063.2019.1678796] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Kerena Rachel
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, India
| | - Surajit Pathak
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, India
| | - A. Moorthi
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, India
| | - Srinivasan Narasimhan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, India
| | - Ramachandran Murugesan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, India
| | - Shoba Narayan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, India
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Narayan S, Shah U. Cerebrovascular reactivity significantly impaired post-stroke, more so ipsilaterally: a TCD based case-control study. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.656] [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: 11/25/2022]
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Sasankan N, Geng H, Zhong H, Fan Y, Rosen M, Bradley J, Cao J, Garces Y, Iyengar P, Kavadi V, Robinson C, Welsh J, Narayan S, MacRae R, Gaur R, Curran W, Videtic G, Pu V A, Koprowski C, Xiao Y. Radiomic Biomarkers Evaluation of the High Dose Arm of RTOG 0617. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.088] [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: 10/26/2022]
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18
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Palaniraj S, Murugesan R, Narayan S. Chlorogenic acid- loaded calcium phosphate chitosan nanogel as biofilm degradative materials. Int J Biochem Cell Biol 2019; 114:105566. [PMID: 31283996 DOI: 10.1016/j.biocel.2019.105566] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/20/2019] [Accepted: 07/04/2019] [Indexed: 10/26/2022]
Abstract
This work describes an effort to develop an antimicrobial agent (chlorogenic acid - CGA) loaded porous nanogel based on calcium phosphate-chitosan (CaPNP@Chi) nanogel with biofilm degradative properties and has potential applications in restorative dentistry. The nanogel was prepared by ionic gelation of calcium phosphate nanoparticles and chitosan in the ratio of 1.25: 1. Chlorogenic acid was loaded to the nanoparticles as an ethanolic solution and the encapsulation efficiency determined by chromatographic techniques. The particle size and morphology of CaPNP@Chi and CaPNP@Chi@CGA was determined by dynamic light scattering and scanning electron microscopic techniques. The minimum inhibitory concentration against S. aureus and K. pneumoniae was determined through the well diffusion method. The biofilm formation and biofilm decay were studied through staining assays. The toxicity, if any of the nanogel was assessed by MTT assay against HaCaT cells. All data were statistically analyzed. The composite had a CGA encapsulation efficiency of 70% and was thermally stable up to 124 °C. The zone of inhibition was found to be 18.7 mm ± 0.6 against S. aureus. CaPNP@Chi@CGA showed a 68% increase in biofilm degradation when compared with the untreated group. Results obtained in this study suggest that the positively charged nanogel interacted with the bacterial cell membrane and brought about the disruption of the cell membrane. Also, CaPNP@Chi@CGA was observed to be nontoxic up to 40 μg/mL to HaCaT cells. These results support the potential of CaPNP@Chi@CGA nanogel for biofilm degradation and its application as filling material in restorative dentistry.
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Affiliation(s)
- Subitha Palaniraj
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, 603103, India
| | - Ramachandran Murugesan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, 603103, India
| | - Shoba Narayan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamilnadu, 603103, India.
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Thor M, Deasy J, Hu C, Choy H, Komaki R, Masters G, Blumenschein G, Forster K, Oh J, Kavadi V, Narayan S, Timmerman R, Robinson C, Greenberger J, Biggs D, Augspurger M, Meng J, Bradley J. The Role of Heart-Related Dose-Volume Metrics on Overall Survival in the RTOG 0617 Clinical Trial. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.06.247] [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: 11/16/2022]
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20
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Narayan S, Pareek P. Epidemiological parameters and survival outcome of gall bladder cancer: An North West India based institution study. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy432.009] [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: 11/13/2022] Open
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21
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Seshasubramanian V, Manisekar NK, Sathishkannan AD, Naganathan C, Nandakumar Y, Narayan S. Urdu speaking population from South India: Six extended haplotypes in linkage disequilibrium in Urdu Speaking Population. HLA 2018; 92:266-268. [DOI: 10.1111/tan.13326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 06/18/2018] [Accepted: 06/21/2018] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | | | - S. Narayan
- Jeevan Stem Cell Foundation; Chennai India
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22
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Seshasubramanian V, Manisekar NK, Sathishkannan AD, Naganathan C, Nandakumar Y, Narayan S. Kannadigas from South India: Putatively unique five-locus haplotypes among the Kannadigas of South India. HLA 2018; 92:193-195. [DOI: 10.1111/tan.13324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 06/18/2018] [Accepted: 06/21/2018] [Indexed: 10/28/2022]
Affiliation(s)
| | | | | | | | | | - S. Narayan
- Jeevan Stem Cell Foundation; Chennai India
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23
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Singh MK, Jamal F, Dubey AK, Shivam P, Kumari S, Pushpanjali, Bordoloi C, Narayan S, Das VNR, Pandey K, Das P, Singh SK. Visceral leishmaniasis: A novel nuclear envelope protein 'nucleoporins-93 (NUP-93)' from Leishmania donovani prompts macrophage signaling for T-cell activation towards host protective immune response. Cytokine 2018; 113:200-215. [PMID: 30001865 DOI: 10.1016/j.cyto.2018.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 07/02/2018] [Accepted: 07/03/2018] [Indexed: 02/06/2023]
Abstract
The shift of macrophage and T-cell repertoires towards proinflammatory cytokine signalling ensures the generation of host-protective machinery that is otherwise compromised in cases of the intracellular Leishmania parasite. Different groups have attempted to restore host protective immunity. These vaccine candidates showed good responses and protective effects in murine models, but they generally failed during human trials. In the present study, we evaluated the effect of 97 kDa recombinant nucleoporin-93 of Leishmania donovani (rLd-NUP93) on mononuclear cells in healthy and treated visceral leishmaniasis (VL) patients and on THP-1 cell lines. rLd-NUP93 stimulation increased the expression of the early lymphocyte activation marker CD69 on CD4+ and CD8+ T cells. The expression of the host protective pro-inflammatory cytokines IFN-γ, IL-12 and TNF-α was increased, with a corresponding down-regulation of IL-10 and TGF-β upon rLd-NUP93 stimulation. This immune polarization resulted in the up-regulation of NF-κB p50 with scant expression of SMAD-4. Augmenting lymphocyte proliferation upon priming with rLd-NUP93 ensured its potential for activation and generation of strong T-cell mediated immune responses. This stimulation extended the leishmanicidal activity of macrophages by releasing high amounts of reactive oxygen species (ROS). Further, the leishmanicidal activity of macrophages was intensified by the elevated production of nitric oxide (NO). The fact that this antigen was earlier reported in circulating immune complexes of VL patients highlights its antigenic importance. In addition, in silico analysis suggested the presence of MHC class I and II-restricted epitopes that proficiently trigger CD8+ and CD4+ T-cells, respectively. This study reported that rLd-NUP93 was an effective immunoprophylactic agent that can be explored in future vaccine design.
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Affiliation(s)
- Manish K Singh
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India
| | - Fauzia Jamal
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India
| | - Amit K Dubey
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India; National Institute of Pharmaceutical Education and Research, Hajipur 844102, India
| | - Pushkar Shivam
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India
| | - Sarita Kumari
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India
| | - Pushpanjali
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India
| | - Chayanika Bordoloi
- National Institute of Pharmaceutical Education and Research, Hajipur 844102, India
| | - S Narayan
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India
| | - V N R Das
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India
| | - K Pandey
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India
| | - P Das
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India
| | - Shubhankar K Singh
- Rajendra Memorial Research Institute of Medical Sciences, Patna 800007, India.
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Narayan S. Lithium entrapped chitosan nanoparticles to reduce toxicity and increase cellular uptake of lithium. Environ Toxicol Pharmacol 2018; 61:79-86. [PMID: 29852373 DOI: 10.1016/j.etap.2018.05.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/21/2018] [Accepted: 05/23/2018] [Indexed: 06/08/2023]
Abstract
Lithium carbonate is an effective drug against bipolar disorders. Direct use of lithium carbonate has been reported to result in lithium toxication and pulmonary complications. With chitosan micro and nanoparticles gaining attention for their protein absorption, drug targeting and improved dissolution rate of sparingly water-soluble drugs, this work has focused on chitosan loaded Li as a possible alternative to Li alone for cellular uptake. Well standardized ionic gelation technique employed in this study resulted in Li loaded chitosan nanoparticles with hydrodynamic diameter below 300 nm and zeta potential of + 30 mV and oval morphology. Through various techniques electrostatic interaction as well as Claritin dependent endocytic pathway is suggested as facilitating 1.3 times increase in cell proliferation in lithium carbonate loaded chitosan nanoparticles treated PC12 cells. A controlled Li release to the extent of less than 50% in 48 h from the nanoparticle was observed. This observation has very high significance as it ensures that the lithium toxicity can be avoided. These results indicated that chitosan is a promising carrier for lithium carbonate and may improve its therapeutic efficacy and also overcome toxicity during its use in the treatment of neuropsychiatric disorders.
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Affiliation(s)
- Shoba Narayan
- Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Chettinad Hospital and Research Institute, Kelambakkam, Tamil Nadu, 603103, India.
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25
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Alcalay RN, Wolf P, Levy OA, Kang UJ, Waters C, Fahn S, Ford B, Kuo SH, Vanegas N, Shah H, Liong C, Narayan S, Pauciulo MW, Nichols WC, Gan-Or Z, Rouleau GA, Chung WK, Oliva P, Keutzer J, Marder K, Zhang XK. Alpha galactosidase A activity in Parkinson's disease. Neurobiol Dis 2018; 112:85-90. [PMID: 29369793 PMCID: PMC5811339 DOI: 10.1016/j.nbd.2018.01.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/16/2018] [Accepted: 01/17/2018] [Indexed: 12/11/2022] Open
Abstract
Glucocerebrosidase (GCase, deficient in Gaucher disease) enzymatic activity measured in dried blood spots of Parkinson's Disease (PD) cases is within healthy range but reduced compared to controls. It is not known whether activities of additional lysosomal enzymes are reduced in dried blood spots in PD. To test whether reduction in lysosomal enzymatic activity in PD is specific to GCase, we measured GCase, acid sphingomyelinase (deficient in Niemann-Pick disease types A and B), alpha galactosidase A (deficient in Fabry), acid alpha-glucosidase (deficient in Pompe) and galactosylceramidase (deficient in Krabbe) enzymatic activities in dried blood spots of PD patients (n = 648) and controls (n = 317) recruited from Columbia University. Full sequencing of glucocerebrosidase (GBA) and the LRRK2 G2019S mutation was performed. Enzymatic activities were compared between PD cases and controls using t-test and regression models adjusted for age, gender, and GBA and LRRK2 G2019S mutation status. Alpha galactosidase A activity was lower in PD cases compared to controls both when only non-carriers were included (excluding all GBA and LRRK2 G2019S carriers and PD cases with age-at-onset below 40) [2.85 μmol/l/h versus 3.12 μmol/l/h, p = 0.018; after controlling for batch effect, p = 0.006 (468 PD cases and 296 controls)], and when including the entire cohort (2.89 μmol/l/h versus 3.10 μmol/l/h, p = 0.040; after controlling for batch effect, p = 0.011). Because the alpha galactosidase A gene is X-linked, we stratified the analyses by sex. Among women who were non-carriers of GBA and LRRK2 G2019S mutations (PD, n = 155; control, n = 194), alpha galactosidase A activity was lower in PD compared to controls (2.77 μmol/l/h versus 3.10 μmol/l/h, p = 0.044; after controlling for a batch effect, p = 0.001). The enzymatic activity of acid sphingomyelinase, acid alpha-glucosidase and galactosylceramidase was not significantly different between PD and controls. In non-carriers, most lysosomal enzyme activities were correlated, with the strongest association in GCase, acid alpha-glucosidase, and alpha galactosidase A (Pearson correlation coefficient between 0.382 and 0.532). In a regression model with all five enzymes among non-carriers (adjusted for sex and age), higher alpha galactosidase A activity was associated with lower odds of PD status (OR = 0.54; 95% CI:0.31-0.95; p = 0.032). When LRRK2 G2019S PD carriers (n = 37) were compared to non-carriers with PD, carriers had higher GCase, acid sphingomyelinase and alpha galactosidase A activity. We conclude that alpha galactosidase A may have a potential independent role in PD, in addition to GCase.
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Affiliation(s)
- R N Alcalay
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA.
| | - P Wolf
- Translational Sciences, Sanofi R&D, Framingham, MA, USA
| | - O A Levy
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - U J Kang
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - C Waters
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - S Fahn
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - B Ford
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - S H Kuo
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - N Vanegas
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - H Shah
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - C Liong
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - S Narayan
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - M W Pauciulo
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center and the Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - W C Nichols
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center and the Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Z Gan-Or
- Montréal Neurological Institute and Hospital, McGill University, Montreal, QC, Canada; Department of Neurology & Neurosurgery, McGill University, Montreal, QC, Canada; Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - G A Rouleau
- Montréal Neurological Institute and Hospital, McGill University, Montreal, QC, Canada; Department of Neurology & Neurosurgery, McGill University, Montreal, QC, Canada; Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - W K Chung
- Department of Pediatrics and Medicine, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - P Oliva
- Translational Sciences, Sanofi R&D, Framingham, MA, USA
| | - J Keutzer
- Translational Sciences, Sanofi R&D, Framingham, MA, USA
| | - K Marder
- Department of Neurology, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA; Gertrude H. Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - X K Zhang
- Translational Sciences, Sanofi R&D, Framingham, MA, USA
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Mary Lazer L, Sadhasivam B, Palaniyandi K, Muthuswamy T, Ramachandran I, Balakrishnan A, Pathak S, Narayan S, Ramalingam S. Chitosan-based nano-formulation enhances the anticancer efficacy of hesperetin. Int J Biol Macromol 2017; 107:1988-1998. [PMID: 29032208 DOI: 10.1016/j.ijbiomac.2017.10.064] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 10/08/2017] [Accepted: 10/11/2017] [Indexed: 01/06/2023]
Abstract
Cancer is one of the major causes of increased morbidity and mortality in modern society. Colorectal cancer is the third leading cause for cancer related death worldwide. Current chemotherapeutics are not very effective and have severe side effects. Hesperetin is a bioflavonoid from citrus fruits and its clinical use is restricted because of the poor water solubility. Folate receptor is overexpressed in various cancer cells. Therefore, we synthesized the chitosan folate hesperetin nanoparticle (CFH) by covalently conjugating folic acid with chitosan molecules. The size of the CFH nanoparticles is around 450nm, which is advantageous for passively targeting the cancer cell specifically due to the leaky vasculature of the tumour. Particle surface and size were observed using SEM and TEM studies. The results show that hesperetin has an IC50 value of 190μM and it induces apoptosis in HCT15 cells, however, CFH is very potent in inhibiting the proliferation with the IC50 value of 28μM. In addition, CFH inhibited colony formation and induced apoptosis by regulating the expression of proapoptotic genes expression. Therefore, the chitosan - folic acid conjugation appears to be the suitable carrier for colorectal cancer cell-specific delivery of hesperetin.
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Affiliation(s)
- Lizha Mary Lazer
- Department of Biotechnology, School of Bio-Engineering, SRM University, Kattankulathur, Kanchipuram - 603203, Tamil Nadu, India; Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Kelambakkam, Chennai - 603103, Tamil Nadu, India
| | - Balaji Sadhasivam
- Department of Endocrinology, Dr. ALMPGIBMS, University of Madras, Taramani Campus, Chennai - 600113, Tamil Nadu, India
| | - Kanagaraj Palaniyandi
- Department of Biotechnology, School of Bio-Engineering, SRM University, Kattankulathur, Kanchipuram - 603203, Tamil Nadu, India
| | - Thangavel Muthuswamy
- Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Kelambakkam, Chennai - 603103, Tamil Nadu, India
| | - Ilangovan Ramachandran
- Department of Endocrinology, Dr. ALMPGIBMS, University of Madras, Taramani Campus, Chennai - 600113, Tamil Nadu, India
| | - Anandan Balakrishnan
- Department of Genetics, Dr. ALMPGIBMS, University of Madras, Taramani Campus, Chennai - 600113, Tamil Nadu, India
| | - Surajit Pathak
- Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Kelambakkam, Chennai - 603103, Tamil Nadu, India
| | - Shoba Narayan
- Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Kelambakkam, Chennai - 603103, Tamil Nadu, India
| | - Satish Ramalingam
- Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Kelambakkam, Chennai - 603103, Tamil Nadu, India; Department of Genetic Engineering, School of Bio-Engineering, SRM University, Kattankulathur, Kanchipuram - 603203, Tamil Nadu, India.
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27
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Jin J, Hu C, Xiao Y, Zhang H, Ellsworth S, Schild S, Bogart J, Dobelbower M, Kavadi V, Narayan S, Iyengar P, Robinson C, Brufsky A, Koprowski C, Machtay M, Curran W, Paulus R, Choy H, Bradley J, Kong F. Higher Radiation Dose to Immune System is Correlated With Poorer Survival in Patients With Stage III Non–small Cell Lung Cancer: A Secondary Study of a Phase 3 Cooperative Group Trial (NRG Oncology RTOG 0617). Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.351] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tamboli M, Kowaleski C, Imielski B, Alhusseini M, Baykaner T, Zaman J, Shenasa F, Krummen D, Viswanathan M, Wang P, Brachmann J, Miller J, Vidmar D, Rappel W, Narayan S. 59Interobserver variability in identifying regions where targeted ablation terminates persistent atrial fibrillation using different mapping approaches. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.59] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Navara R, Leef G, Shenasa F, Meckler G, Kowalewski C, Baykaner T, Alhusseini M, Hossainy S, Joshi V, Rogers A, Zaman J, Park S, Zei P, Wang P, Narayan S. P3014Drivers of persistent atrial fibrillation: do focal or rotational regions differ in their stability over time? Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3014] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Imielski B, Kowaleski C, Tamboli M, Alhusseini M, Baykaner T, Meckler G, Shenasa F, Krummen D, Viswanathan M, Wang P, Brachmann J, Miller J, Vidmar D, Rappel W, Narayan S. P777Interobserver accuracy in identifying sources for atrial fibrillation by different mapping algorithms at proven locations of termination. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.p777] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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31
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Kowalewski C, Meckler G, Shenasa F, Baykaner T, Zaman J, Alhusseini M, Hossainy S, Navarra R, Leef G, Viswanathan M, Park S, Krummen D, Brachmann J, Wang P, Narayan S. 980How stable are localized sources in atrial fibrillation? Shedding light on underlying Mechanisms of persistent atrial fibrillation. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.980] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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32
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Meckler G, Tamboli M, Imielski B, Kowalewski C, Alhusseini M, Vidmar D, Shenasa F, Baykaner T, Zaman J, Krummen D, Wang P, Brachmann J, Miller J, Rappel WJ, Narayan S. P364Identifying regions where targeted ablation terminated persistent atrial fibrillation: interobserver variability in multiple mapping systems. Europace 2017. [DOI: 10.1093/ehjci/eux141.090] [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: 11/13/2022] Open
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33
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Alhusseini M, Vidmar D, Meckler G, Kowalewski C, Shenasa F, Baykaner T, Zaman J, Krummen D, Zei P, Viswanathan M, Wang P, Brachmann J, Miller J, Rappel WJ, Narayan S. 115Two independent methods show rotational drivers at sites where ablation terminates persistent atrial fibrillation prior to pulmonary vein isolation. Europace 2017. [DOI: 10.1093/ehjci/eux135.004] [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: 11/13/2022] Open
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Meckler G, Shenasa F, Clopton P, Kowalewski C, Alhusseini M, Narayan S, Zei P. P362Minimizing fluoroscopy during focal impulse and rotor modulation (FIRM) guided ablation for atrial fibrillation. Europace 2017. [DOI: 10.1093/ehjci/eux141.088] [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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35
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Vedhanayagam M, Nidhin M, Duraipandy N, Naresh ND, Jaganathan G, Ranganathan M, Kiran MS, Narayan S, Nair BU, Sreeram KJ. Role of nanoparticle size in self-assemble processes of collagen for tissue engineering application. Int J Biol Macromol 2017; 99:655-664. [PMID: 28274865 DOI: 10.1016/j.ijbiomac.2017.02.102] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 02/28/2017] [Accepted: 02/28/2017] [Indexed: 11/26/2022]
Abstract
Nanoparticle mediated extracellular matrix may offer new and improved biomaterial to wound healing and tissue engineering applications. However, influence of nanoparticle size in extracellular matrix is still unclear. In this work, we synthesized different size of silver nanoparticles (AgNPs) comprising of 10nm, 35nm and 55nm using nutraceuticals (pectin) as reducing as well as stabilization agents through microwave irradiation method. Synthesized Ag-pectin nanoparticles were assimilated in the self-assemble process of collagen leading to fabricated collagen-Ag-pectin nanoparticle based scaffolds. Physico-chemical properties and biocompatibility of scaffolds were analyzed through FT-IR, SEM, DSC, mechanical strength analyzer, antibacterial activity and MTT assay. Our results suggested that 10nm sized Ag-pectin nanoparticles significantly increased the denaturation temperature (57.83°C) and mechanical strength (0.045MPa) in comparison with native collagen (50.29°C and 0.011MPa). The in vitro biocompatibility assay reveals that, collagen-Ag-pectin nanoparticle based scaffold provided higher antibacterial activity against to Gram positive and Gram negative as well as enhanced cell viability toward keratinocytes. This work opens up a possibility of employing the pectin caged silver nanoparticles to develop collagen-based nanoconstructs for biomedical applications.
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Affiliation(s)
- Mohan Vedhanayagam
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - Marimuthu Nidhin
- Department of Chemistry, Amity School of Applied Sciences, Amity University, Gurgaon, India
| | - Natarajan Duraipandy
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | | | - Ganesh Jaganathan
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - Mohan Ranganathan
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | | | - Shoba Narayan
- Faculty of Allied Health Sciences, Chettinad Academy of Research & Education, Chennai 603 103, India
| | - Balachandran Unni Nair
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
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Manikandan S, Narayan S. Comparison of effects of propofol infusion on the middle cerebral velocity between normal and tumor side in patients with intracranial space occupying lesions. Journal of Neuroanaesthesiology and Critical Care 2017. [DOI: 10.1055/s-0038-1646238] [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] [Indexed: 10/27/2022] Open
Affiliation(s)
- S. Manikandan
- Division of Neuroanesthesia and Neurocritical Care, SCTIMST, Trivandrum, Kerala, India
| | - S. Narayan
- Division of Neuroanesthesia and Neurocritical Care, SCTIMST, Trivandrum, Kerala, India
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Krishnan S, Narayan S, Chadha A. Whole resting cells vs. cell free extracts of Candida parapsilosis ATCC 7330 for the synthesis of gold nanoparticles. AMB Express 2016; 6:92. [PMID: 27718213 PMCID: PMC5055519 DOI: 10.1186/s13568-016-0268-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 10/03/2016] [Indexed: 11/10/2022] Open
Abstract
The cell free extracts of Candida parapsilosis ATCC 7330 are more efficient than the whole resting cells of the yeast in the synthesis of directly usable gold nanoparticles as revealed by this systematic study. Cell free extracts yielded gold nanoparticles of hydrodynamic diameter (50-200 nm). In this study, the total protein concentration influences the nanofabrication and not only the reductase enzymes as originally thought. Powder X-ray diffraction studies confirm the crystalline nature of the gold nanoparticles. Fourier Transform Infra Red spectroscopy and thermal gravimetric analysis suggests that the biosynthesized gold nanoparticles are capped by peptides/proteins. Dispersion experiments indicate a stable dispersion of gold nanoparticles in pH 12 solutions which is also confirmed by electron microscopic analysis and validated using a surface plasmon resonance assay. The effectiveness of the dispersed nanoparticles for the reduction of 4-nitrophenol using sodium borohydride as a reductant further confirms the formation of functional gold nanoparticles. It is also reported that gold nanoparticles with mean particle diameter of 27 nm are biosynthesized inside the whole cell by transmission electron microscopy analysis. With optimized reaction conditions, maximum gold bioaccumulation with the 24 h culture age of the yeast with cellular uptake of ~1010 gold atoms at the single cell level is achieved but it is not easy to extract the gold nanoparticles from the whole resting cells.
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Affiliation(s)
- Saravanan Krishnan
- Laboratory of Bioorganic Chemistry, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, India
| | - Shoba Narayan
- Laboratory of Bioorganic Chemistry, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, India
- Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Kelambakkam, Chennai, India
| | - Anju Chadha
- Laboratory of Bioorganic Chemistry, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, India
- National Center for Catalysis Research, Indian Institute of Technology Madras, Chennai, India
- Centre for NEMS and Nanophotonics, Indian Institute of Technology Madras, Chennai, India
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Graham J, Narayan S, Pendry K. Improving transfusion education for junior doctors; exploring UK experiences. Transfus Med 2016; 27:96-104. [DOI: 10.1111/tme.12373] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 09/20/2016] [Accepted: 09/26/2016] [Indexed: 11/26/2022]
Affiliation(s)
- J.E. Graham
- Department of Haematology; University Hospitals of North Midlands NHS Trust; Stoke-on-Trent UK
| | - S. Narayan
- Manchester Blood Centre; NHS Blood & Transplant; Manchester UK
| | - K. Pendry
- Manchester Blood Centre; NHS Blood & Transplant; Manchester UK
- Department of Haematology; Central Manchester University Hospitals NHS Foundation Trust; Manchester UK
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Narayan S, Ahluwalia VV, Saharan PS, Gupta AK. Intraosseous Lipoma of the Proximal Radius with Extra Osseous Extension leading to Posterior Interosseous Nerve Compression: HRUS Diagnosis. J Orthop Case Rep 2016; 6:56-58. [PMID: 28116271 PMCID: PMC5245940 DOI: 10.13107/jocr.2250-0685.506] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
INTRODUCTION Benign musculoskeletal lipomatous lesions are common in both soft tissue and bone. Imaging features of benign lipomatous lesions are often pathognomonic. Ultrasound (US) has been used to examine both soft tissue and bone tumors, allowing targeted CT or MRI examination of the region of interest. CASE REPORT A 46-year-old female presented with a four year history of palpable mass lesion just below the lateral aspect of right elbow with clinical evidence of posterior interosseous nerve compression. X-ray showed the presence of a radiolucency mass in relation to radius. HRUS demonstrated a hyperechoic mass in soft tissue with a focal irregularity in bony cortex of radius. The mass lesion compressed the posterior interosseous nerve. CONCLUSION Although CT and MRI diagnose them accurately, but ultrasound characteristics are also conclusive for extra osseous component. This case highlights the importance of HRUS for evaluation of musculoskeletal tumors and any secondary changes in a readily available cost effective dynamic modality and thus guide for treatment planning accordingly.
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Affiliation(s)
- S. Narayan
- Department of radiodiagnosis, UPRIMS&R, Saifai, India
| | | | - P. Singh Saharan
- Department of Radiodiagnosis, Sarojini Medical College, Agra, India
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Saugat S, Kumar H, Sharma N, Singhal M, Beniwal S, Kumari P, Narayan S, Kapoor A, Jakhar S, Maharia S, Nirban R. RM-024 Survival analysis of post-operatively treated cancer gall bladder patients with Adjuvant Chemo-radiotherapy: an institutional study. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw201.23] [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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Kumari P, Narayan S, Singhal M, Saugat S. RM-010 Irinotecan and oxaliplatin-based regimens in metastatic colorectal cancer and optimization of sequence: a regional cancer center study. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw201.10] [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: 11/13/2022] Open
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Abstract
BACKGROUND Enteric infections may on occasion be sexually transmitted, particularly among people who engage in oral-anal sexual contact. Although outbreaks of enteric infections have been reported among men who have sex with men (MSM) in British Columbia (BC), the epidemiology of sexually transmitted enteric infections has never been assessed. OBJECTIVE To describe the epidemiology of enteric infections in BC to determine if sexual transmission may be occurring. METHODS A descriptive analysis was conducted of all reported cases of shigellosis, amebiasis and giardiasis in BC for the period 2003-2012. RESULTS For shigellosis and amebiasis, there was a high male-to-female ratio and a higher rate of infection in males aged 20-59 years as compared to all other age-sex groups. Additionally, for shigellosis, adult males were significantly more likely than females to acquire disease locally (RR 1.9; CI 1.7--.4). CONCLUSION Analysis suggests that sexual transmission of enteric infections, particularly shigellosis and amebiasis, may be occurring in MSM in BC. Further studies are indicated.
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Affiliation(s)
- S Narayan
- Simon Fraser University, Burnaby, BC
| | - E Galanis
- BC Centre for Disease Control, Vancouver, BC
| | - BC STEI Group
- BC STEI group membership: Forsting S, Hoang L, Jeyes J, Nowakowski C6, Ritson M4, Stone J, Tone G
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Bhandari A, Narayan S, Vardhan K. Relationship between oxygen saturation and clinical symptoms or signs in infants from 2 months to 12 months age with acute respiratory distress due to hyper reactive airway disease. J Mar Med Soc 2016. [DOI: 10.4103/0975-3605.204460] [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: 11/04/2022] Open
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Bhandari A, Narayan S, Vardhan K. Comparison of Neonatal Outcome After Induction of Labour with 25 and 50 meg of Misoprostol. J Mar Med Soc 2016. [DOI: 10.4103/0975-3605.204466] [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: 11/04/2022] Open
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Beniwal S, Narayan S, Rao G, Singhal M, Jakher S, Maheria S, Sharma N, Kumar H, Sharma A. 464P Comparision of irinotecan/cisplatin with etoposide/cisplatin in North-West Indian population with extensive-stage disease small-cell lung cancer. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv532.48] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Jakhar S, Singh G, Kothari T, Narayan S, Kapoor A, Syiem T, Purohit R, Kumar H, Sharma N, Solanki A. 380P Prospective randomized trial of standard antiemetic therapy with yoga versus standard antiemetic therapy alone for highly emetogenic chemotherapy induced nausea and vomiting in South Asian population. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv531.13] [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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Kumar N, Kapoor A, Kalwar A, Kumar A, Narayan S, Lal S, Beniwal S. 452P A phase II study of geftinib versus best supportive care as second or third line therapy in advanced squamous cell carcinoma of lung in Asian Indians. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv532.36] [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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Kapoor A, Kumar N, Kalwar A, Narayan S, Singhal M, Kumar A, Lal S. 423PD A prospective phase III study of three weekly versus weekly paclitaxel as second line therapy in advanced non small cell lung cancer. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv532.07] [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: 11/13/2022] Open
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Regine W, Winter K, Kessel I, Chen Y, Fugazzi J, Donnelly E, DiPetrillo T, Narayan S, Plastaras J, Gaur R, Delouya G, Suh J, Meyer J, Haddock M, Didolkar M, Padula G, Johnson D, Hoffman J, Crane C. Prospective and Concurrent Analysis of Postresection CA19-9 Level and Surgical Margin Status (SMS) as Predictors of Pattern of Disease Recurrence Following Adjuvant Treatment for Pancreatic Carcinoma: NRG Oncology/RTOG 9704 Secondary Analysis. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kumari S, Jamal F, Shivam P, Thakur A, Kumar M, Bimal S, Das V, Pandey K, Narayan S, Gupta A, Das P, Singh SK. Leishmania donovani skews the CD56+ Natural Killer T cell response during human visceral leishmaniasis. Cytokine 2015; 73:53-60. [DOI: 10.1016/j.cyto.2015.01.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 01/16/2015] [Accepted: 01/20/2015] [Indexed: 01/05/2023]
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