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Chirag J Patel

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https://www.readbyqxmd.com/read/29074088/the-american-brachytherapy-society-consensus-statement-for-accelerated-partial-breast-irradiation
#1
Chirag Shah, Frank Vicini, Simona F Shaitelman, Jaroslaw Hepel, Martin Keisch, Douglas Arthur, Atif J Khan, Robert Kuske, Rakesh Patel, David E Wazer
PURPOSE: Adjuvant radiation after breast-conserving surgery remains the standard-of-care treatment for patients with ductal carcinoma in situ and early-stage invasive breast cancer. Multiple alternatives to standard whole-breast irradiation exist including accelerated partial-breast irradiation (APBI). Therefore, the purpose of this APBI guideline is to provide updated data for clinicians as well as recommendations regarding appropriate patient selection and techniques to deliver APBI...
October 23, 2017: Brachytherapy
https://www.readbyqxmd.com/read/29066231/antibiotic-prophylaxis-and-infection-prevention-for-endoscopic-endonasal-skull-base-surgery-our-protocol-results-and-review-of-the-literature
#2
Stephen J Johans, Daniel J Burkett, Kevin N Swong, Chirag R Patel, Anand V Germanwala
Endoscopic endonasal approaches to the skull base provide minimally invasive corridors to intracranial lesions; however, enthusiasm for this new approach is always tempered by the recognition that this route requires passage through a nonsterile sinonasal corridor. Despite an increasing number of patients undergoing these surgeries, there remains no consensus on the use of perioperative antibiotics. A retrospective review of consecutive patients undergoing endoscopic endonasal skull base surgery (EESBS) at Loyola University Medical Center by the same neurosurgeon and otolaryngologist team between February 2015 and October 2016 was performed...
October 21, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29038595/covariate-selection-for-association-screening-in-multiphenotype-genetic-studies
#3
Hugues Aschard, Vincent Guillemot, Bjarni Vilhjalmsson, Chirag J Patel, David Skurnik, Chun J Ye, Brian Wolpin, Peter Kraft, Noah Zaitlen
Testing for associations in big data faces the problem of multiple comparisons, wherein true signals are difficult to detect on the background of all associations queried. This difficulty is particularly salient in human genetic association studies, in which phenotypic variation is often driven by numerous variants of small effect. The current strategy to improve power to identify these weak associations consists of applying standard marginal statistical approaches and increasing study sample sizes. Although successful, this approach does not leverage the environmental and genetic factors shared among the multiple phenotypes collected in contemporary cohorts...
October 16, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28978193/current-challenges-and-new-opportunities-for-gene-environment-interaction-studies-of-complex-diseases
#4
Kimberly McAllister, Leah E Mechanic, Christopher Amos, Hugues Aschard, Ian A Blair, Nilanjan Chatterjee, David Conti, W James Gauderman, Li Hsu, Carolyn M Hutter, Marta M Jankowska, Jacqueline Kerr, Peter Kraft, Stephen B Montgomery, Bhramar Mukherjee, George J Papanicolaou, Chirag J Patel, Marylyn D Ritchie, Beate R Ritz, Duncan C Thomas, Peng Wei, John S Witte
Recently, many new approaches, study designs, and statistical and analytical methods have emerged for studying gene-environment interactions (G×Es) in large-scale studies of human populations. There are opportunities in this field, particularly with respect to the incorporation of -omics and next-generation sequencing data and continual improvement in measures of environmental exposures implicated in complex disease outcomes. In a workshop called "Current Challenges and New Opportunities for Gene-Environment Interaction Studies of Complex Diseases," held October 17-18, 2014, by the National Institute of Environmental Health Sciences and the National Cancer Institute in conjunction with the annual American Society of Human Genetics meeting, participants explored new approaches and tools that have been developed in recent years for G×E discovery...
October 1, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28978192/update-on-the-state-of-the-science-for-analytical-methods-for-gene-environment-interactions
#5
W James Gauderman, Bhramar Mukherjee, Hugues Aschard, Li Hsu, Juan Pablo Lewinger, Chirag J Patel, John S Witte, Christopher Amos, Caroline G Tai, David Conti, Dara G Torgerson, Seunggeun Lee, Nilanjan Chatterjee
The analysis of gene-environment interaction (G×E) may hold the key for further understanding the etiology of many complex traits. The current availability of high-volume genetic data, the wide range in types of environmental data that can be measured, and the formation of consortiums of multiple studies provide new opportunities to identify G×E but also new analytical challenges. In this article, we summarize several statistical approaches that can be used to test for G×E in a genome-wide association study...
October 1, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28941007/leveraging-population-based-clinical-quantitative-phenotyping-for-drug-repositioning
#6
Adam S Brown, Danielle Rasooly, Chirag J Patel
Computational drug repositioning methods can scalably nominate approved drugs for new diseases, with reduced risk of unforeseen side effects. The majority of methods eschew individual-level phenotypes despite the promise of biomarker-driven repositioning. In this study, we propose a framework for discovering serendipitous interactions between drugs and routine clinical phenotypes in cross-sectional observational studies. Key to our strategy is the use of a healthy and non-diabetic population derived from the National Health and Nutrition Examination Survey, mitigating risk for confounding by indication...
September 22, 2017: CPT: Pharmacometrics & Systems Pharmacology
https://www.readbyqxmd.com/read/28877476/mtorc2-signaling-selectively-regulates-the-generation-and-function-of-tissue-resident-peritoneal-macrophages
#7
Min-Hee Oh, Samuel L Collins, Im-Hong Sun, Ada J Tam, Chirag H Patel, Matthew L Arwood, Yee Chan-Li, Jonathan D Powell, Maureen R Horton
Tissue-resident macrophages play critical roles in sentinel and homeostatic functions as well as in promoting inflammation and immunity. It has become clear that the generation of these cells is highly dependent upon tissue-specific cues derived from the microenvironment that, in turn, regulate unique differentiation programs. Recently, a role for GATA6 has emerged in the differentiation programming of resident peritoneal macrophages. We identify a critical role for mTOR in integrating cues from the tissue microenvironment in regulating differentiation and metabolic reprogramming...
September 5, 2017: Cell Reports
https://www.readbyqxmd.com/read/28844315/massively-parallel-sequencing-and-targeted-exomes-in-familial-kidney-disease-can-diagnose-underlying-genetic-disorders
#8
Andrew J Mallett, Hugh J McCarthy, Gladys Ho, Katherine Holman, Elizabeth Farnsworth, Chirag Patel, Jeffery T Fletcher, Amali Mallawaarachchi, Catherine Quinlan, Bruce Bennetts, Stephen I Alexander
Inherited kidney disease encompasses a broad range of disorders, with both multiple genes contributing to specific phenotypes and single gene defects having multiple clinical presentations. Advances in sequencing capacity may allow a genetic diagnosis for familial renal disease, by testing the increasing number of known causative genes. However, there has been limited translation of research findings of causative genes into clinical settings. Here, we report the results of a national accredited diagnostic genetic service for familial renal disease...
August 23, 2017: Kidney International
https://www.readbyqxmd.com/read/28800141/effects-of-strong-cyp3a-inhibition-and-induction-on-the-pharmacokinetics-of-ixazomib-an-oral-proteasome-inhibitor-results-of-drug-drug-interaction-studies-in-patients-with-advanced-solid-tumors-or-lymphoma-and-a-physiologically-based-pharmacokinetic-analysis
#9
Neeraj Gupta, Michael J Hanley, Karthik Venkatakrishnan, Alberto Bessudo, Drew W Rasco, Sunil Sharma, Bert H O'Neil, Bingxia Wang, Guohui Liu, Alice Ke, Chirag Patel, Karen Rowland Yeo, Cindy Xia, Xiaoquan Zhang, Dixie-Lee Esseltine, John Nemunaitis
At clinically relevant ixazomib concentrations, in vitro studies demonstrated that no specific cytochrome P450 (CYP) enzyme predominantly contributes to ixazomib metabolism. However, at higher than clinical concentrations, ixazomib was metabolized by multiple CYP isoforms, with the estimated relative contribution being highest for CYP3A at 42%. This multiarm phase 1 study (Clinicaltrials.gov identifier: NCT01454076) investigated the effect of the strong CYP3A inhibitors ketoconazole and clarithromycin and the strong CYP3A inducer rifampin on the pharmacokinetics of ixazomib...
August 11, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28710141/perspective-improving-nutritional-guidelines-for-sustainable-health-policies-current-status-and-perspectives
#10
Paolo Magni, Dennis M Bier, Sergio Pecorelli, Carlo Agostoni, Arne Astrup, Furio Brighenti, Robert Cook, Emanuela Folco, Luigi Fontana, Robert A Gibson, Ranieri Guerra, Gordon H Guyatt, John Pa Ioannidis, Ann S Jackson, David M Klurfeld, Maria Makrides, Basil Mathioudakis, Alessandro Monaco, Chirag J Patel, Giorgio Racagni, Holger J Schünemann, Raanan Shamir, Niv Zmora, Andrea Peracino
A large body of evidence supports the notion that incorrect or insufficient nutrition contributes to disease development. A pivotal goal is thus to understand what exactly is appropriate and what is inappropriate in food ingestion and the consequent nutritional status and health. The effective application of these concepts requires the translation of scientific information into practical approaches that have a tangible and measurable impact at both individual and population levels. The agenda for the future is expected to support available methodology in nutrition research to personalize guideline recommendations, properly grading the quality of the available evidence, promoting adherence to the well-established evidence hierarchy in nutrition, and enhancing strategies for appropriate vetting and transparent reporting that will solidify the recommendations for health promotion...
July 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/28710076/opportunities-and-challenges-for-environmental-exposure-assessment-in-population-based-studies
#11
REVIEW
Chirag J Patel, Jacqueline Kerr, Duncan C Thomas, Bhramar Mukherjee, Beate Ritz, Nilanjan Chatterjee, Marta Jankowska, Juliette Madan, Margaret R Karagas, Kimberly A McAllister, Leah E Mechanic, M Daniele Fallin, Christine Ladd-Acosta, Ian A Blair, Susan L Teitelbaum, Christopher I Amos
A growing number and increasing diversity of factors are available for epidemiological studies. These measures provide new avenues for discovery and prevention, yet they also raise many challenges for adoption in epidemiological investigations. Here, we evaluate 1) designs to investigate diseases that consider heterogeneous and multidimensional indicators of exposure and behavior, 2) the implementation of numerous methods to capture indicators of exposure, and 3) the analytical methods required for discovery and validation...
September 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28648637/xyloglucan-a-functional-biomacromolecule-for-drug-delivery-applications
#12
REVIEW
Abhijeet D Kulkarni, Aditya A Joshi, Chirag L Patil, Prasad D Amale, Harun M Patel, Sanjay J Surana, Veena S Belgamwar, Kapil S Chaudhari, Chandrakantsing V Pardeshi
The near future of drug delivery system would lie in the search of a versatile and innocuous material, based mostly on the natural resources. The tamarind seed xyloglucan (XG) is a natural neutral hemicellulose and a hydrophilic polysaccharide consisting of a main chain of glucan backbone with xylose and galactose side chains. XG is endowed with idiosyncratic mucoadhesive and in situ gelling properties which rated XG as an attractive, functional polymer for numerous drug delivery applications. In milieu of this, the present review is designed to underline the plausible potential of XG or XG-based systems in drug delivery...
November 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28600083/evaluation-of-clinical-target-volume-expansion-required-for-involved-site-neck-radiotherapy-for-lymphoma-to-account-for-the-absence-of-a-pre-chemotherapy-pet-ct-in-the-radiotherapy-treatment-position
#13
David Bird, Chirag Patel, Andrew F Scarsbrook, Viv Cosgrove, Emma Thomas, Di Gilson, Robin J D Prestwich
BACKGROUND AND PURPOSE: Involved site radiotherapy clinical target volume (CTV) for lymphoma requires an expansion to account for the absence of radiotherapy treatment-position pre-chemotherapy imaging, which is not widely implemented. This prospective imaging study aims to quantify CTV expansion required for neck radiotherapy. MATERIALS AND METHODS: 10 patients from a prospective single centre imaging study underwent a pre-chemotherapy FDG-PET-CT in both the diagnostic and radiotherapy treatment position, and subsequently received neck radiotherapy post-chemotherapy...
June 6, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28536869/the-technique-and-benefits-of-angiographic-embolization-of-inferior-epigastric-arteries-prior-to-pedicled-tram-flap-breast-reconstruction-results-from-a-single-center
#14
Alysse J Sever, Chirag Patel, Yahya Albeer, Vigen B Darian
PURPOSE: To report a single center's experience with selective arterial embolization of the deep inferior epigastric arteries (DIEA) prior to pedicled TRAM flap breast reconstruction including techniques and outcomes. MATERIALS AND METHODS: Retrospective chart review was performed for 15 patients who underwent pedicled TRAM flap breast reconstruction after selective embolization of bilateral DIEA. Data were analyzed to display the spectrum of postoperative outcomes following the TRAM flap procedure status post-selective angiographic embolization of the bilateral DIEA to improve vascularity of the TRAM flaps by rendering the tissue partially ischemic to undergo neovascularization...
May 23, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28291243/a-standard-database-for-drug-repositioning
#15
Adam S Brown, Chirag J Patel
Drug repositioning, the process of discovering, validating, and marketing previously approved drugs for new indications, is of growing interest to academia and industry due to reduced time and costs associated with repositioned drugs. Computational methods for repositioning are appealing because they putatively nominate the most promising candidate drugs for a given indication. Comparing the wide array of computational repositioning methods, however, is a challenge due to inconsistencies in method validation in the field...
March 14, 2017: Scientific Data
https://www.readbyqxmd.com/read/28251040/analytic-complexity-and-challenges-in-identifying-mixtures-of-exposures-associated-with-phenotypes-in-the-exposome-era
#16
REVIEW
Chirag J Patel
PURPOSE OF REVIEW: Mixtures, or combinations and interactions between multiple environmental exposures, are hypothesized to be causally linked with disease and health-related phenotypes. Established and emerging molecular measurement technologies to assay the exposome, the comprehensive battery of exposures encountered from birth to death, promise a new way of identifying mixtures in disease in the epidemiological setting. In this opinion, we describe the analytic complexity and challenges in identifying mixtures associated with phenotype and disease...
2017: Current Epidemiology Reports
https://www.readbyqxmd.com/read/28194614/the-exposome-research-paradigm-an-opportunity-to-understand-the-environmental-basis-for-human-health-and-disease
#17
REVIEW
Germaine M Buck Louis, Melissa M Smarr, Chirag J Patel
PURPOSE OF REVIEW: This paper presents an overview of the exposome research paradigm with particular application to understanding human reproduction and development and its implications for health across a lifespan. RECENT FINDINGS: The exposome research paradigm has generated considerable discussion about its feasibility and utility for delineating the impact of environmental exposures on human health. Early initiatives are underway, including smaller proof-of-principle studies and larger concerted efforts...
March 2017: Current Environmental Health Reports
https://www.readbyqxmd.com/read/28176476/recurrent-atypical-haemolytic-uraemic-syndrome-post-kidney-transplant-due-to-a-cd46-mutation-in-the-setting-of-smarcal1-mediated-inherited-kidney-disease
#18
REVIEW
Samuel Chan, Andrew J Mallett, Chirag Patel, Ross S Francis, David W Johnson, David W Mudge, Nicole M Isbel
Disorders in the regulation of the alternate complement pathway often result in complement-mediated damage to the microvascular endothelium and can be associated with both glomerulonephritis and atypical haemolytic uraemic syndrome. Inherited defects in complement regulatory genes or autoantibodies against complement regulatory proteins are predictive of the severity of the disease and the risk of recurrence post kidney transplantation. Heterozygous mutations in CD46, which codes for a transmembrane cofactor glycoprotein membrane cofactor protein, usually have a lower incidence of end-stage kidney disease and decreased risk of recurrent disease post transplant, as wild-type membrane cofactor protein is present in the transplanted kidney...
February 2017: Nephrology
https://www.readbyqxmd.com/read/28068484/informatics-and-data-analytics-to-support-exposome-based-discovery-for-public-health
#19
Arjun K Manrai, Yuxia Cui, Pierre R Bushel, Molly Hall, Spyros Karakitsios, Carolyn J Mattingly, Marylyn Ritchie, Charles Schmitt, Denis A Sarigiannis, Duncan C Thomas, David Wishart, David M Balshaw, Chirag J Patel
The complexity of the human exposome-the totality of environmental exposures encountered from birth to death-motivates systematic, high-throughput approaches to discover new environmental determinants of disease. In this review, we describe the state of science in analyzing the human exposome and provide recommendations for the public health community to consider in dealing with analytic challenges of exposome-based biomedical research. We describe extant and novel analytic methods needed to associate the exposome with critical health outcomes and contextualize the data-centered challenges by drawing parallels to other research endeavors such as human genomics research...
March 20, 2017: Annual Review of Public Health
https://www.readbyqxmd.com/read/28004011/methods-to-enhance-the-reproducibility-of-precision-medicine
#20
Arjun K Manrai, Chirag J Patel, Nils Gehlenborg, Nicholas P Tatonetti, John P A Ioannidis, Isaac S Kohane
No abstract text is available yet for this article.
2016: Pacific Symposium on Biocomputing
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