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Andersen ZJ, Zhang J, Lim YH, So R, Jørgensen JT, Mortensen LH, Napolitano GM, Cole-Hunter T, Loft S, Bhatt S, Hoek G, Brunekreef B, Westendorp R, Ketzel M, Brandt J, Lange T, Kølsen-Fisher T. Long-Term Exposure to AIR Pollution and COVID-19 Mortality and Morbidity in DENmark: Who Is Most Susceptible? (AIRCODEN). Res Rep Health Eff Inst 2023:1-41. [PMID: 38286761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2024] Open
Abstract
INTRODUCTION Early ecological studies have suggested a link between air pollution and Coronavirus Diseases 2019 (COVID-19); however, the evidence from individual-level prospective cohort studies is still sparse. Here, we have examined, in a general population, whether long-term exposure to air pollution is associated with the risk of contracting severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and developing severe COVID-19, resulting in hospitalization or death and who is most susceptible. We also examined whether long-term exposure to air pollution is associated with hospitalization or death due to COVID-19 in those who have tested positive for SARS-CoV-2. METHODS We included all Danish residents 30 years or older who resided in Denmark on March 1, 2020. and followed them in the National COVID-19 Surveillance System until first positive test (incidence), COVID-19 hospitalization, or death until April 26, 2021. We estimated mean levels of nitrogen dioxide (NO2), particulate matter with an aerodynamic diameter <2.5 μm (PM2.5), black carbon (BC), and ozone (O3) at cohort participants' residence in 2019 by the Danish Eulerian Hemispheric Model/Urban Background Model. We used Cox proportional hazard models to estimate the associations of air pollutants with COVID-19 incidence, hospitalization, and mortality adjusting for age, sex, and socioeconomic status (SES) at the individual and area levels. We examined effect modification by age, sex, SES (education, income, wealth, employment), and comorbidities with cardiovascular disease, respiratory disease, acute lower respiratory infections, diabetes, lung cancer, and dementia. We used logistic regression to examine association of air pollutants with COVID-19-related hospitalization or death among SARS-CoV-2 positive patients, adjusting for age, sex, individual- and area-level SES. RESULTS Of 3,721,810 people, 138,742 were infected, 11,270 hospitalized, and 2,557 died from COVID-19 during 14 months of follow-up. We detected strong positive associations with COVID-19 incidence, with hazard ratio (HR) and 95% confidence interval (CI) of 1.10 (CI: 1.05-1.14) per 0.5-μg/m3 increase in PM2.5 and 1.18 (CI: 1.14-1.23) per 3.6-μg/m3 increase in NO2. For COVID-19 hospitalizations and for COVID-19 deaths, corresponding HRs and 95% CIs were 1.09 (CI: 1.01-1.17) and 1.19 (CI: 1.12-1.27), respectively for PM2.5, and 1.23 (CI: 1.04-1.44) and 1.18 (CI: 1.03-1.34), respectively for NO2. We also found strong positive and statistically significant associations with BC and negative associations with O3. Associations were strongest in those aged 65 years old or older, participants with the lowest SES, and patients with chronic cardiovascular, respiratory, metabolic, lung cancer, and neurodegenerative disease. Among 138,742 individuals who have tested positive for SARS-Cov-2, we detected positive association with COVID-19 hospitalizations (N = 11,270) with odds ratio and 95% CI of 1.04 (CI: 1.01- 1.08) per 0.5-μg/m3 increase in PM2.5 and 1.06 (CI: 1.01-1.12) per 3.6-μg/m3 increase in NO2, but no association with PM with an aerodynamic diameter <10 μm (PM10), BC, or O3, and no association between any of the pollutants and COVID-19 mortality (N = 2,557). CONCLUSIONS This large nationwide study provides strong new evidence in support of association between long-term exposure to air pollution and COVID-19.
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Affiliation(s)
- Z J Andersen
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Denmark
| | - J Zhang
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Denmark
| | - Y-H Lim
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Denmark
| | - R So
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Denmark
| | - J T Jørgensen
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Denmark
| | - L H Mortensen
- Section of Epidemiology, Department of Public Health, University of Copenhagen, Denmark
- Statistics Denmark, Copenhagen, Denmark
| | - G M Napolitano
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Denmark
| | - T Cole-Hunter
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Denmark
| | - S Loft
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Denmark
| | - S Bhatt
- Section of Epidemiology, Department of Public Health, University of Copenhagen, Denmark
| | - G Hoek
- Institute for Risk Assessment Sciences, Utrecht University, the Netherlands
| | - B Brunekreef
- Institute for Risk Assessment Sciences, Utrecht University, the Netherlands
| | - Rgj Westendorp
- Section of Epidemiology, Department of Public Health, University of Copenhagen, Denmark
| | - M Ketzel
- Department of Environmental Science, Aarhus University, Denmark
- Global Centre for Clean Air Research (GCARE), University of Surrey, United Kingdom
| | - J Brandt
- Climate, Interdisciplinary Centre for Climate Change, Aarhus University, Roskilde, Denmark
| | - T Lange
- Department of Public Health, University of Copenhagen, Denmark
| | - T Kølsen-Fisher
- Department of Clinical Research, Nordsjaellands Hospital, Hilleroed, Denmark
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Longoni M, Bhasin K, Ward A, Lee D, Nisson M, Bhatt S, Rodriguez F, Dash R. Real-world utilization of guideline-directed genetic testing in inherited cardiovascular diseases. Front Cardiovasc Med 2023; 10:1272433. [PMID: 37915745 PMCID: PMC10616303 DOI: 10.3389/fcvm.2023.1272433] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 09/29/2023] [Indexed: 11/03/2023] Open
Abstract
Background Cardiovascular disease continues to be the leading cause of death globally. Clinical practice guidelines aimed at improving disease management and positively impacting major cardiac adverse events recommend genetic testing for inherited cardiovascular conditions such as dilated cardiomyopathy (DCM), hypertrophic cardiomyopathy (HCM), long QT syndrome (LQTS), hereditary amyloidosis, and familial hypercholesterolemia (FH); however, little is known about how consistently practitioners order genetic testing for these conditions in routine clinical practice. This study aimed to assess the adoption of guideline-directed genetic testing for patients diagnosed with DCM, HCM, LQTS, hereditary amyloidosis, or FH. Methods This retrospective cohort study captured real-world evidence of genetic testing from ICD-9-CM and ICD-10-CM codes, procedure codes, and structured text fields of de-identified patient records in the Veradigm Health Insights Ambulatory EHR Research Database linked with insurance claims data. Data analysis was conducted using an automated electronic health record analysis engine. Patient records in the Veradigm database were sourced from more than 250,000 clinicians serving over 170 million patients in outpatient primary care and specialty practice settings in the United States and linked insurance claims data from public and private insurance providers. The primary outcome measure was evidence of genetic testing within six months of condition diagnosis. Results Between January 1, 2017, and December 31, 2021, 224,641 patients were newly diagnosed with DCM, HCM, LQTS, hereditary amyloidosis, or FH and included in this study. Substantial genetic testing care gaps were identified. Only a small percentage of patients newly diagnosed with DCM (827/101,919; 0.8%), HCM (253/15,507; 1.6%), LQTS (650/56,539; 1.2%), hereditary amyloidosis (62/1,026; 6.0%), or FH (718/49,650; 1.5%) received genetic testing. Conclusions Genetic testing is underutilized across multiple inherited cardiovascular conditions. This real-world data analysis provides insights into the delivery of genomic healthcare in the United States and suggests genetic testing guidelines are rarely followed in practice.
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Affiliation(s)
- Mauro Longoni
- Global Medical Affairs Organization, Illumina, Inc., San Diego, CA, United States
| | | | | | | | | | - Sucheta Bhatt
- Global Medical Affairs Organization, Illumina, Inc., San Diego, CA, United States
| | - Fatima Rodriguez
- HealthPals Inc., Redwood, CA, United States
- Division of Cardiovascular Medicine and Cardiovascular Institute, Stanford University, Stanford, CA, United States
| | - Rajesh Dash
- HealthPals Inc., Redwood, CA, United States
- Division of Cardiovascular Medicine and Cardiovascular Institute, Stanford University, Stanford, CA, United States
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Pati D, Roy A, Porwal M, Beemkumar N, Patel M G, Bhatt S. INNOVATIONS IN ARTIFICIAL ORGANS AND TISSUE ENGINEERING: FROM 3D PRINTING TO STEM CELL THERAPY. Georgian Med News 2023:101-106. [PMID: 37805882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
Abstract
"Every year, many individuals with tissue or organ problems require urgent care due to medical emergencies, burns, congenital anomalies, and other causes". Regenerative medicine was created because there aren't enough donors, issues with graft rejection, and insufficient organs or tissues for patients to replace, repair, and regenerate. However, significant tissue defects are difficult to fill with injections alone, making stem cell therapy a crucial component of the area of regenerative medicine. To achieve the intended outcome, the researchers combine stem cells with three-dimensional (3D) printed organs tissue engineering scaffolding. These scaffolds can resemble bone, cartilage, or "extracellular matrix (ECM)" in that they provide structural support and promote adhesion, proliferation, and differentiation, finally resulting in the production of functional tissues or organs. In this study on stem cell regenerative medicine, the therapeutic focused mostly on scaffolding for 3D printed organ tissue engineering. The following applications are demonstrated and compared using various 3D printing processes and starting materials. Then, we go over the benefits of 3D printing over conventional methods, touch on certain issues and restrictions, and make some assumptions about potential applications in the future.
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Affiliation(s)
- D Pati
- 1Department of Ayurveda, Sanskriti University, Mathura, Uttar Pradesh, India
| | - A Roy
- 2Department of Allied Healthcare & Sciences, Vivekananda Global University, Jaipur, India
| | - M Porwal
- 3College of Pharmacy, TeerthankerMahaveer University, Moradabad, Uttar Pradesh, India
| | - N Beemkumar
- 4Department of Mechanical Engineering, Faculty of Engineering and Technology, JAIN (Deemed-to-be University), Bangalore, India
| | - G Patel M
- 5Department of Community Medicine, Parul University, PO Limda, Tal. Waghodia, District Vadodara, Gujarat, India
| | - S Bhatt
- 6Department of Nursing, IIMT University, Meerut, Uttar Pradesh, India
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Gekas J, Boomer TH, Rodrigue MA, Jinnett KN, Bhatt S. Use of cell-free signals as biomarkers for early and easy prediction of preeclampsia. Front Med (Lausanne) 2023; 10:1191163. [PMID: 37293304 PMCID: PMC10244626 DOI: 10.3389/fmed.2023.1191163] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/09/2023] [Indexed: 06/10/2023] Open
Abstract
Introduction Preeclampsia (PE) is a leading cause of maternal and perinatal morbidity worldwide. However, current methods of screening are complicated and require special skill sets. In this observational study of prospectively collected samples, we wanted to evaluate if cell-free (cf) DNA could be an efficient biomarker for identification of at-risk patients. Methods One hundred patients attending a private prenatal clinic in Canada were enrolled in their first trimester of pregnancy and a blood draw was carried out at 11 + 0 to 14 + 2 weeks' (timepoint A) and 17 + 6 to 25 + 5 weeks of gestation (timepoint B). CfDNA signals, namely concentration, fetal fraction, and fragment size distribution, were correlated with clinical outcomes in the test population to develop the logistic regression model. Results Twelve patients developed PE-four early-stage and eight late-stage PE. Significant differences were observed between PE patients and control cases for all three cfDNA signals at timepoint A, while both fetal fraction and concentration were significantly different between PE patients and control cases at timepoint B. Overall, the model had a sensitivity of up to 100% and specificity of up to 87.5% at Timepoint A. Conclusion This proof-of-principle study showed that use of this logistic regression model could identify patients at risk of preeclampsia in the first trimester of pregnancy.
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Affiliation(s)
- Jean Gekas
- Department of Medical Genetics, Quebec University Mother and Child Center, Laval Medical University, Quebec City, QC, Canada
| | | | - Marc-André Rodrigue
- Department of Medical Genetics, Quebec University Mother and Child Center, Laval Medical University, Quebec City, QC, Canada
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Bhasin K, Longoni M, Ward A, Lee D, Nisson M, Bhatt S, Rodriguez F, Dash R. UNDERUTILIZATION OF GUIDELINE-DIRECTED GENETIC TESTING IN INHERITED CARDIOVASCULAR DISEASES. J Am Coll Cardiol 2023. [DOI: 10.1016/s0735-1097(23)02297-0] [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: 03/06/2023]
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Rai S, Nandy K, Bhatt S, Patel D, Mithi M, Rathod P. Surgical outcomes of T4b oral cancers: assessment of prognostic factors and a need to re-evaluate the current staging system. Int J Oral Maxillofac Surg 2023; 52:143-151. [PMID: 35610163 DOI: 10.1016/j.ijom.2022.04.015] [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: 06/23/2021] [Revised: 04/26/2022] [Accepted: 04/28/2022] [Indexed: 01/11/2023]
Abstract
T4b oral cancer is a broad umbrella term for all advanced oral cancers, the prognosis of which varies drastically for disease of the same stage, according to the extent of the masticator space involvement. This was a retrospective observational study including all consecutive T4b oral squamous cell carcinoma patients treated surgically between January 2015 and January 2016 and followed up until January 2020. The disease was classified as upper disease or lower disease based on the anatomical location in relation to an imaginary plane passing through the base of the retromolar trigone. The prime objective was to evaluate overall survival and prognostic factors affecting overall survival. The projected 5-year overall and disease-free survival rates were 40.7% and 35.6%, respectively. The assessment of prognostic factors revealed that lower disease (lower anatomical subsites), bone invasion, and lymph nodal spread significantly affected survival. Patients with disease in an upper anatomical location without bone and nodal involvement can achieve fairly good survival (projected 5-year overall survival of 64.2%) when compared to the other subsets of patients. We propose a re-evaluation of the current staging system based on the prognostic features, so that all patients are not considered under a single stage, since their survival differs significantly.
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Affiliation(s)
- S Rai
- Department of Surgical Oncology, Gujarat Cancer and Research Institute, Ahmedabad, Gujarat, India
| | - K Nandy
- Department of Surgical Oncology, Gujarat Cancer and Research Institute, Ahmedabad, Gujarat, India
| | - S Bhatt
- Department of Surgical Oncology, Gujarat Cancer and Research Institute, Ahmedabad, Gujarat, India.
| | - D Patel
- Department of Surgical Oncology, Gujarat Cancer and Research Institute, Ahmedabad, Gujarat, India
| | - M Mithi
- Department of Surgical Oncology, Gujarat Cancer and Research Institute, Ahmedabad, Gujarat, India
| | - P Rathod
- Department of Surgical Oncology, Gujarat Cancer and Research Institute, Ahmedabad, Gujarat, India
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Yadav KK, Chouhan N, Thubstan R, Norlha S, Hariharan J, Borwankar C, Chandra P, Dhar VK, Mankuzhyil N, Godambe S, Sharma M, Venugopal K, Singh KK, Bhatt N, Bhattacharyya S, Chanchalani K, Das MP, Ghosal B, Godiyal S, Khurana M, Kotwal SV, Koul MK, Kumar N, Kushwaha CP, Nand K, Pathania A, Sahayanathan S, Sarkar D, Tolamati A, Koul R, Rannot RC, Tickoo AK, Chitnis VR, Behere A, Padmini S, Manna A, Joy S, Nair PM, Jha KP, Moitra S, Neema S, Srivastava S, Punna M, Mohanan S, Sikder SS, Jain A, Banerjee S, . K, Deshpande J, Sanadhya V, Andrew G, Patil MB, Goyal VK, Gupta N, Balakrishna H, Agrawal A, Srivastava SP, Karn KN, Hadgali PI, Bhatt S, Mishra VK, Biswas PK, Gupta RK, Kumar A, Thul SG, Kalmady R, Sonvane DD, Kumar V, Gaur UK, Chattopadhyay J, Gupta SK, Kiran AR, Parulekar Y, Agrawal MK, Parmar RM, Reddy GR, Mayya YS, Pithawa CK. Commissioning of the MACE gamma-ray telescope at Hanle, Ladakh, India. CURR SCI INDIA 2022. [DOI: 10.18520/cs/v123/i12/1428-1435] [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: 01/25/2023]
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Gurung RB, Sapkota P, Bhatt S, Tamang A, Joshi S, Khadka S, Jaisy DN, Chalise S, Shrestha P. Rickettsial Infection amongst Febrile Illness Patient in a Tertiary Care Hospital: A Retrospective Cross-sectional Study. Kathmandu Univ Med J (KUMJ) 2022; 20:366-371. [PMID: 37042381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2023]
Abstract
Background Rickettsial infection is an emerging neglected tropical disease in the Southeast Asia. In past few years Nepal is also reporting escalating prevalence of rickettsia. The under evaluation is resulting it as undiagnosed or are simply labeled as pyrexia of unknown origin. Objective To find out the prevalence of rickettsia in a hospital setting, assess the sociodemographic and other relevant clinical features of the rickettsia patients. Method This is a hospital based retrospective cross-sectional study from October 2020 to October 2021. This study reviewed the medical records of the department. Result The study included 105 eligible patients and the prevalence rate was 4.38 per 100 patients. The mean age of the participants was 42 years, and the mean hospital stay was 3 (SD ±2.06) days. More than 55% of the participants had fever for less than or equal to 5 days and 9% had Eschar present. Vomiting, headache, and myalgia were the most common symptoms and hypertension, and diabetes were the common comorbidities. Pneumonia and the acute kidney injury were the two complications of the patients as stated in the study. The severity of the thrombocytopenia deducted from admission time to discharge, and the case fatality was 4%. Conclusion The future studies shall consider on collaborative clinical and entomological research. This would help in better understanding of the etiology of supposedly unknown febrile illness and the under-investigated field of emerging rickettsia in Nepal.
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Affiliation(s)
- R B Gurung
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - P Sapkota
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - S Bhatt
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - A Tamang
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - S Joshi
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - S Khadka
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - D N Jaisy
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - S Chalise
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - P Shrestha
- Department of Public Health and Community Programs, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
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Dahal S, Karmacharya RM, Vaidya S, Gautam K, Bhatt S, Bhandari N. A rare case of persistent lateral marginal vein of Servelle in Klippel Trenaunay Syndrome: A successful surgical management. Int J Surg Case Rep 2022; 94:107052. [PMID: 35405516 PMCID: PMC9006318 DOI: 10.1016/j.ijscr.2022.107052] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 01/19/2023] Open
Abstract
Introduction and importance Klippel-Trenaunay Syndrome (KTS) is a rare congenital vascular disorder characterized by capillary malformation, varicosities, and tissue overgrowth. It usually affects the unilateral lower extremities manifesting commonly as pain, localized rise of temperature, and venous tortuosity. However, in severe cases, ulceration, cellulitis, and chronic lymphatic malformation may be present. Management is mostly supportive and involves the use of compression stockings. Case presentation Here, we report a case of KTS with a persistent lateral marginal vein of Servelle managed with radiofrequency ablation along with sclerotherapy of selected perforators. On a two-year follow-up, the symptoms had resolved and Doppler ultrasonography revealed resolution of the defective vein along with the absence of incompetent perforators. Clinical discussion In cases with venous malformation with the persistence of embryonic avalvular venous structures, like the lateral marginal vein of Servelle, surgical intervention is warranted especially at a younger age to reduce the risk of future thromboembolic events and recurrence. Conclusion Varicosities of the lateral marginal vein of Servelle can be managed successfully by radiofrequency ablation and adjunct sclerotherapy in selected cases. Klippel-Trenaunay Syndrome (KTS) is a congenital vascular disorder which usually affects the unilateral lower extremities. Endovenous treatment of the greater saphenous vein is gradually becoming popular in the treatment of KTS. This case is managed by radiofrequency ablation of lateral marginal vein of Servelle.
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Affiliation(s)
- S Dahal
- Department of Surgery (CTVS), Dhulikhel Hospital, Kathmandu University Hospital, Nepal.
| | - R M Karmacharya
- Department of Surgery (CTVS), Dhulikhel Hospital, Kathmandu University Hospital, Nepal
| | - S Vaidya
- Department of Surgery (CTVS), Dhulikhel Hospital, Kathmandu University Hospital, Nepal
| | - K Gautam
- Department of Surgery (CTVS), Dhulikhel Hospital, Kathmandu University Hospital, Nepal
| | - S Bhatt
- Department of Surgery (CTVS), Dhulikhel Hospital, Kathmandu University Hospital, Nepal
| | - N Bhandari
- Department of Surgery (CTVS), Dhulikhel Hospital, Kathmandu University Hospital, Nepal
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Sapkota P, Vaidhya N, Bhatt S, Shrestha P. Nitrobenzene Induced Methemoglobinemia with Paroxysmal Atrial Fibrillation Treated with Single Volume Exchange Transfusions. Kathmandu Univ Med J (KUMJ) 2022; 20:246-248. [PMID: 37017176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Methemoglobinemia is a potentially fatal condition if left untreated. Conventional treatment of nitrobenzene induced methemoglobinemia dictates the use of methylene blue, which is the antidote of choice. However, its availability in our setting is limited only to the laboratory use. We present a case of a 21-year-old female with intentional ingestion of nitrobenzene. Clinical history and supportive investigations revealed methemoglobinemia and it was successfully managed with single volume exchange transfusions in absence of specific antidote. While exchange transfusions are indicated for severe cases, it may be useful as an alternative treatment in acute life-threatening conditions where methylene blue is not available.
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Affiliation(s)
- P Sapkota
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - N Vaidhya
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - S Bhatt
- Department of Internal Medicine, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - P Shrestha
- Department of Public Health and Community Programs, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
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Bhatt S, Taylor AK, Lozano R, Grody WW, Griffin JH. Addendum: American College of Medical Genetics consensus statement on factor V Leiden mutation testing. Genet Med 2021; 23:2463. [PMID: 33674767 DOI: 10.1038/s41436-021-01108-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 01/21/2021] [Indexed: 11/09/2022] Open
Affiliation(s)
| | - Annette K Taylor
- Colorado Coagulation, Laboratory Corporation of America Holdings, Englewood, CO, USA
| | - Reymundo Lozano
- Departments of Genetics and Genomic Sciences, Pediatrics and Psychiatry, Icahn School of Medicine at Mount Sinai Hospital, New York, NY, USA
| | - Wayne W Grody
- Divisions of Medical Genetics and Molecular Diagnostics and Departments of Pathology & Laboratory Medicine, Pediatrics, and Human Genetics, UCLA School of Medicine, Los Angeles, CA, USA
- UCLA Institute for Society and Genetics, Los Angeles, CA, USA
| | - John H Griffin
- Department of Molecular Medicine, Scripps Research, La Jolla, CA, USA
- Department of Medicine, University of California San Diego, San Diego, CA, USA
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Pertile MD, Flowers N, Vavrek D, Andrews D, Kalista T, Craig A, Deciu C, Duenwald S, Meier K, Bhatt S. Performance of a Paired-End Sequencing-Based Noninvasive Prenatal Screening Test in the Detection of Genome-Wide Fetal Chromosomal Anomalies. Clin Chem 2021; 67:1210-1219. [PMID: 34077512 DOI: 10.1093/clinchem/hvab067] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 04/13/2021] [Indexed: 12/29/2022]
Abstract
BACKGROUND Noninvasive prenatal tests (NIPTs) detect fetal chromosomal anomalies with high clinical sensitivity and specificity. We examined the performance of a paired-end sequencing-based NIPT in the detection of genome-wide fetal chromosomal anomalies including common trisomies, sex chromosomal aneuploidies (SCA), rare autosomal aneuploidies (RAAs), and partial deletions/duplications ≥7 Mb. METHODS Frozen plasma samples from pregnant women were tested using the VeriSeq NIPT Solution v2 assay. All samples were previously tested with a laboratory-developed NIPT and had known clinical outcomes. Individuals performing the sequencing were blinded to clinical outcome data. Clinical sensitivity and specificity were determined for basic (chromosomes 21, 18, 13, X, and Y) and genome-wide screening modes. RESULTS Of 2335 samples that underwent genome-wide analysis, 28 did not meet QC requirements, resulting in a first-pass assay failure rate of 1.2%. Basic screening analysis, excluding known mosaics, correctly classified 130/130 trisomy 21 samples (sensitivity >99.9%, 95% confidence interval [CI] 97.1%-100%), 41/41 trisomy 18 samples (sensitivity >99.9%, 95% CI 91.4%-100%), and 26/26 trisomy 13 samples (sensitivity >99.9%, 95% CI 87.1%-100%) with 6 false-positive results; specificities ≥99.90% were reported for all 3 trisomies. Concordance for SCAs ranged from 90.5%-100%. Genome-wide screening analysis including known mosaics correctly classified 27/28 RAAs and 20/27 partial deletions/duplications with a specificity of 99.80% for both anomalies, and an overall genome-wide specificity for all anomalies of 99.34%. CONCLUSIONS The VeriSeq NIPT Solution v2 assay enables accurate identification of fetal aneuploidy, allowing detection of genome-wide fetal chromosomal anomalies with high clinical sensitivities and specificities and a low assay failure rate.Clinical Trial Notification [CTN] identification number [ID]: CT-2018-CTN-01585-1 v1, Protocol: NIPT T05 002.
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Affiliation(s)
- Mark D Pertile
- Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Melbourne, Victoria, Australia.,Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Nicola Flowers
- Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Melbourne, Victoria, Australia
| | - Darcy Vavrek
- Departments of Bioinformatics, Biostatistics, Development, Medical Affairs, and Clinical Affairs, Illumina, Inc., San Diego, CA, USA
| | - Daniel Andrews
- Departments of Bioinformatics, Biostatistics, Development, Medical Affairs, and Clinical Affairs, Illumina, Inc., San Diego, CA, USA
| | - Tasha Kalista
- Departments of Bioinformatics, Biostatistics, Development, Medical Affairs, and Clinical Affairs, Illumina, Inc., San Diego, CA, USA
| | - Andrew Craig
- Departments of Bioinformatics, Biostatistics, Development, Medical Affairs, and Clinical Affairs, Illumina, Inc., San Diego, CA, USA
| | - Cosmin Deciu
- Departments of Bioinformatics, Biostatistics, Development, Medical Affairs, and Clinical Affairs, Illumina, Inc., San Diego, CA, USA
| | - Sven Duenwald
- Departments of Bioinformatics, Biostatistics, Development, Medical Affairs, and Clinical Affairs, Illumina, Inc., San Diego, CA, USA
| | - Kristen Meier
- Departments of Bioinformatics, Biostatistics, Development, Medical Affairs, and Clinical Affairs, Illumina, Inc., San Diego, CA, USA
| | - Sucheta Bhatt
- Departments of Bioinformatics, Biostatistics, Development, Medical Affairs, and Clinical Affairs, Illumina, Inc., San Diego, CA, USA
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Peng S, Bhatt S, Borrell A, Yaron Y. Economic impact of using maternal plasma cell-free DNA testing to guide further workup in recurrent pregnancy loss. Prenat Diagn 2021; 41:1215-1221. [PMID: 34002411 PMCID: PMC8518071 DOI: 10.1002/pd.5972] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 03/02/2021] [Accepted: 05/08/2021] [Indexed: 11/15/2022]
Abstract
Objective We have previously demonstrated that maternal‐plasma cell‐free DNA (cfDNA)‐testing can detect chromosomal anomalies in recurrent pregnancy loss (RPL) with 81.8% sensitivity and 90.3% specificity. Here we assess whether this is cost effective in guiding further workup in RPLs. Method A decision‐analytic model was developed to compare the cost of various RPL management pathways: (1) current American Society for Reproductive Medicine (ASRM) RPL workup; (2) microarray or karyotyping analysis of products of conception (POCs) and RPL workup only for euploid cases; and (3) cfDNA testing and RPL workup only for euploid cases. Sample accessibility, failure rates, and sensitivity were specified for each test. Costs of sample collection, genetic tests, and RPL workup were considered. Analysis outcomes included detection rate of chromosomal anomaly and cost per patient tested. Results In comparison to existing cytogenetic testing on POCs, cfDNA testing pathway allowed for better sample accessibility with a lower cost per patient. In addition, using cfDNA to guide further workup significantly increases the number of causative fetal chromosome anomalies detected, reducing the number of patients undergoing unnecessary workup resulting in an overall cost savings. Conclusion Our study showed that inclusion of cfDNA testing is a cost‐effective approach to guide RPL workup.
What is already known about this topic?
Chromosomal anomalies account for 50%–70% of early pregnancy loss (EPL) and even in recurrent pregnancy loss (RPL) random aneuploidy is the single most common etiology, accounting for >50% of cases. In a previous study we have shown that maternal‐plasma genome‐wide cell‐free DNA (cfDNA)‐based testing can reliably detect chromosomal anomalies in random EPL and RPL with a sensitivity of 81.8% and a specificity of 90.3%. We therefore suggested cfDNA‐based testing serve to guide further management in cases of RPL: if cfDNA in the second and subsequent RPL demonstrates aneuploidy, no further action is taken; if an unbalanced rearrangement is found, parental karyotyping is recommended; if no abnormality is detected, the recommended RPL workup is performed.
What does this study add?
In this study we demonstrate that using cfDNA to guide further workup in RPL is a cost‐effective approach. We share our algorithm to facilitate local cost‐effectiveness analysis based on prevailing billing schemes, either based on national health systems or private payor systems.
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Affiliation(s)
- Siyang Peng
- Illumina Inc., San Diego, CA, United States of America
| | - Sucheta Bhatt
- Illumina Inc., San Diego, CA, United States of America
| | - Antoni Borrell
- BCNatal, Hospital Clinic, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain
| | - Yuval Yaron
- Prenatal Genetic Diagnosis Unit, Genetic Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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Salunke AA, Nandy K, Puj K, Kamani M, Pathak S, Shah J, Bhalerao RH, Jain A, Sharma M, Warikoo V, Patel K, Rathod P, Bhatt S, Tank T, Pandya S. A proposed "Radiological Evaluation Score for Bone Tumors" (REST): An objective system for assessment of a radiograph in patients with suspected bone tumor. Musculoskelet Surg 2021; 106:371-382. [PMID: 33982208 DOI: 10.1007/s12306-021-00711-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 05/01/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Although radiographs have been widely used in the evaluation of patients with suspected bone tumors, the lack of an objective radiological assessment method leads to a challenge in reaching correct diagnosis. The study aimed to propose a Radiological Evaluation Score for Bone Tumors (REST) which includes eight radiological factors [characteristics, content, cortical breach, distinctiveness, distribution, periosteal reaction, fracture, and soft tissue swelling] to form a single score along with its validation by multidisciplinary observers. METHODS We reviewed the radiographs of 100 patients with a primary bone tumor which were selected at random from the database between January 2017 and January 2019 of a tertiary cancer center. Four reviewers (two orthopedic oncologists and two surgical oncologists) independently assessed the radiographs, based on the reporting system of REST. We constituted two groups according to the probable diagnosis of bone tumor (suspected benign tumor and suspected malignant tumor). RESULTS The mean score in the suspected benign tumor group was 1.1 (range 0-3, 95% CI 0.8-1.3) and in malignant tumor group was 6.1 (range 2-8, 95% CI 5.8-6.4). A receiver operator characteristic (ROC) curve for REST was with a cutoff of 3.5, with the most diagnostic value area under curve (AUC) of 0.99. The sensitivity was 98% and specificity was 100% with a positive predictive value of 100% and a negative predictive value of 98%. The inter-observer correlation coefficient was 0.985 (p value < 0.05), and Fleiss kappa value for the prediction of the benign or malignant lesion was 0.97 (p value < 0.05). The characteristics and content of tumor, cortical erosion, distinctiveness, distribution, periosteal reaction, and soft tissue mass had a significant correlation with the aggressiveness of bone lesion p value < 0.05. CONCLUSIONS The Radiological Evaluation Score for Bone Tumors (REST) is a structured reporting and objective method for the assessment of radiographs in patients with suspected bone tumors. This method is a reliable and helpful tool for clinicians in their outdoor patient department to differentiate a radiograph of a suspected benign tumor from a malignant bone tumor.
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Affiliation(s)
- A A Salunke
- Department of Surgical Oncology, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - K Nandy
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
| | - K Puj
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
| | - M Kamani
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
| | - S Pathak
- Department of Orthopedics, MM Institute of Medical Sciences & Research, Ambala, India
| | - J Shah
- Osteo Care - Ortho Onco Clinic, Ahmedabad, Gujarat, India
| | - R H Bhalerao
- Department of Electrical Engineering and Computer Science, Institute of Infrastructure, Technology, Research And Management, Ahmedabad, Gujarat, India
| | - A Jain
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
| | - M Sharma
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
| | - V Warikoo
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
| | - K Patel
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
| | - P Rathod
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
| | - S Bhatt
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
| | - T Tank
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
| | - S Pandya
- Department of Anesthesia, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India
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15
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Salunke AA, Nandy K, Kamani M, Puj K, Pathak S, Patel K, Bhalerao RH, Jain A, Sharma M, Warikoo V, Bhatt S, Rathod P, Pandya S. A proposed ''A to Z RAM (Radiograph Assessment Method)'' for triage of patients with a suspected bone tumour. Radiography (Lond) 2021; 27:823-830. [PMID: 33487526 DOI: 10.1016/j.radi.2021.01.001] [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: 11/09/2020] [Revised: 12/19/2020] [Accepted: 01/01/2021] [Indexed: 11/24/2022]
Abstract
INTRODUCTION We propose a ''A to Z RAM (Radiograph Assessment Method)'' for evaluation of Radiograph of patients with a suspected bone tumour. METHODS In the current study, ten radiological features with letters 'A, B, C, D, E, F and Z' were used and which included the age of the patient, involved part of the bone, characteristics, content, distinctiveness, the exterior of the bone, fracture, and zone of transition. Four independent observers (orthopaedic oncologists and surgical oncologists) evaluated a set of 30 radiographs of bone tumour selected at random from our hospital database based on A to Z RAM. We classified the lesions into two groups according to the traffic signal system; Green (suspected benign lesion) and Red (suspected malignant lesion). RESULTS There were 18 (60%) benign bone lesions and 12 (40%) malignant lesions in the current study. 91.6% of malignant tumours and 88.8% of the benign tumours were identified correctly by the four observers. The inter-observer variability with Fleiss kappa was 0.884 (95% CI 0.7-1.03 p-value < 0.05), suggestive of agreement not by chance. These radiographs were again reassessed by the four observers after 3 months. The interobserver variability by Fleiss kappa was 1.0 (95% CI 0.8-1.1) suggesting complete agreement amongst the observers. Both orthopaedic oncologists had intra-observer kappa as 1.0 each and both surgical oncologists had 0.795 and 0.930 respectively. CONCLUSION The proposed A to Z RAM is an easy to use and reproducible method for reviewing radiographs in the out-patient department along with clinical findings for better management of patients with suspected bone lesions. The A to Z RAM can be a medical triage tool and subdivide bone lesions into two subgroups i.e. suspected benign lesion with a suggestion of further investigations with MRI and biopsy and suspected malignant lesion with a suggestion of MRI or early referral to a tertiary cancer center with expertise in orthopaedic oncology. IMPLICATIONS FOR PRACTICE The A to Z RAM (Radiologic Assessment Method) is a reproducible method for reviewing radiographs in the out-patient department and can be an aid for better management of patients. A to Z RAM is useful as a medical triage system, subdividing patients according to the probable diagnosis into a suspected benign lesion and suspected malignant lesion.
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Affiliation(s)
- A A Salunke
- Department of Surgical Oncology, Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - K Nandy
- Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - M Kamani
- Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - K Puj
- Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - S Pathak
- Department of Orthopedics, MM University, Ambala, India.
| | - K Patel
- Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - R H Bhalerao
- Deptartment of Electrical Engineering, IITRAM, Ahmedabad, Gujarat, India.
| | - A Jain
- Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - M Sharma
- Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - V Warikoo
- Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - S Bhatt
- Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - P Rathod
- Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
| | - S Pandya
- Gujarat Cancer Research Institute (GCRI), Ahmedabad, Gujarat, India.
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Abstract
The etiology and pathogenesis of craniofacial birth defects are multifactorial and include both genetic and environmental factors. Despite the identification of numerous genes associated with congenital craniofacial anomalies, our understanding of their etiology remains incomplete, and many affected individuals have an unknown genetic diagnosis. Here, we show that conditional loss of a Mediator complex subunit protein, Med23 in mouse neural crest cells (Med23fx/fx;Wnt1-Cre), results in micrognathia, glossoptosis, and cleft palate, mimicking the phenotype of Pierre Robin sequence. Sox9 messenger RNA and protein levels are both upregulated in neural crest cell-derived mesenchyme surrounding Meckel's cartilage and in the palatal shelves in Med23fx/fx;Wnt1-Cre mutant embryos compared to controls. Consistent with these observations, we demonstrate that Med23 binds to the promoter region of Sox9 and represses Sox9 expression in vitro. Interestingly, Sox9 binding to β-catenin is enhanced in Med23fx/fx;Wnt1-Cre mutant embryos, which, together with downregulation of Col2a1 and Wnt signaling target genes, results in decreased proliferation and altered jaw skeletal differentiation and cleft palate. Altogether, our data support a cell-autonomous requirement for Med23 in neural crest cells, potentially linking the global transcription machinery through Med23 to the etiology and pathogenesis of craniofacial anomalies such as micrognathia and cleft palate.
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Affiliation(s)
- S Dash
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - S Bhatt
- Stowers Institute for Medical Research, Kansas City, MO, USA.,Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS, USA
| | - K T Falcon
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - L L Sandell
- Department of Oral Immunology and Infectious Diseases, University of Louisville, School of Dentistry, Louisville, KY, USA
| | - P A Trainor
- Stowers Institute for Medical Research, Kansas City, MO, USA.,Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS, USA
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Tseng A, Girardo M, Liedl D, Bhatt S, Wennberg P, Shamoun F. Statin use associated with lower mortality in very elderly patients with peripheral arterial disease. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2389] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Given the potential side effects and the lack of data on its efficacy, the role of statins in the very elderly (age 75+) with peripheral arterial disease (PAD) is uncertain. Previous studies have shown significant mortality benefit in very elderly patients with coronary artery disease, but the effect in PAD has not been evaluated.
Methods
Very elderly patients aged 75 to 80 with at least five years of follow-up who underwent ankle-brachial index (ABI) measurement were included. PAD was defined as either low ABI <0.90 or high ABI >1.40. Demographic, medication use, comorbidity and mortality data was obtained using the electronic medical record. Univariate and multivariate Cox proportional hazard analyses were performed.
Results
In total, 4,560 very elderly subjects with PAD were included in the analysis. The median age was 77 (interquartile range 76–79) and 39% were female. 3,462 (76%) had low ABI while 1098 (24%) had high ABI. Univariate analysis showed that patients on statins were more likely to be male, have diabetes, have coronary artery disease, and have hyperlipidemia. Overall, 1,355 (30%) patients died in the five-year period. Unadjusted all-cause mortality hazard ratios for patients with low or high ABI with statin use was 0.66 (95% confidence interval [CI]: 0.57–0.75) and 0.80 (95% CI: 0.66–0.97), respectively. After adjusting for age, sex, coronary artery disease and diabetes, statin use in low and high ABI was still associated with significant reductions in risk of all-cause mortality of 0.59 (95% CI: 0.51–0.67) and 0.66 (95% CI: 0.54–0.80), respectively. The survival curve for very elderly patients with PAD by statin use is shown in Figure 1.
Conclusion
Statin use in the very elderly was associated with lower risk of all-cause mortality in the five-year period after diagnosis of PAD. There appears to be a mortality benefit with statin use in the very elderly with PAD, though careful consideration of benefits and side effects should be individualized in this age group.
Figure 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- A Tseng
- Mayo Clinic, Rochester, United States of America
| | - M Girardo
- Mayo Clinic, Phoenix, United States of America
| | - D Liedl
- Mayo Clinic, Rochester, United States of America
| | - S Bhatt
- Mayo Clinic, Phoenix, United States of America
| | - P Wennberg
- Mayo Clinic, Rochester, United States of America
| | - F Shamoun
- Mayo Clinic, Phoenix, United States of America
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18
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Tseng A, Bhatt S, Girardo M, Liedl D, Wennberg P, Shamoun F. Complex antithrombotic therapy and bleeding risk in patients with peripheral arterial disease. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2396] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Antiplatelet therapy is the cornerstone of treatment for many atherosclerotic vascular pathologies including peripheral arterial disease (PAD). Patients with PAD often have comorbid conditions that require complex antithrombotic therapy, i.e. combined antiplatelet and anticoagulation.
Methods
All adult patients undergoing ankle brachial index (ABI) measurements were included in the study. ABI values between 1.00 and 1.40 were considered normal, and values below 1.00 or above 1.40 were considered PAD. Demographic, comorbidity and outcome data were obtained using diagnostic codes from the electronic health record. Three medication classes were analyzed: aspirin, non-aspirin oral antiplatelets (e.g. P2Y12 inhibitors) and oral anticoagulants (warfarin and the direct oral anticoagulants). Medication use was determined for patients who had been on a medication for at least one year. Cox proportional hazard analysis for the time to first bleeding event was analyzed. Bleeding was defined as any bleeding requiring medical evaluation (including clinically-relevant non-major bleeding and major bleeding).
Results
In all, 40,144 patients were included in the analysis (mean age 66±15, 43% female). Patients with PAD were more likely to be on double therapy (one antiplatelet with anticoagulation) (28% vs 19%) and triple therapy (dual antiplatelet with anticoagulation) (10% vs 4%). Unadjusted hazard ratios for bleeding risk showed increased risk of bleeding for patients with PAD (1.18, 95% confidence interval [CI]: 1.08–1.29), though the association is no longer present after adjustment for antithrombotic therapy. Adjusting for age, sex and PAD class, compared to no antithrombotic therapy, there was increased risk of bleeding for monotherapy (1.91, 95% CI: 1.61–2.26), double therapy (3.40, 95% CI: 2.89–4.00) and triple therapy (5.00, 95% CI: 4.21–5.96). Among medications, aspirin and anticoagulant use was independently associated with the greatest increase in risk of bleeding.
Conclusion
Patients in PAD are at increased risk of bleeding secondary to antithrombotic therapy. Complex antithrombotic therapy with double or triple therapy confer additional bleeding risk, particularly regimens containing aspirin and oral anticoagulants.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- A Tseng
- Mayo Clinic, Rochester, United States of America
| | - S Bhatt
- Mayo Clinic, Phoenix, United States of America
| | - M Girardo
- Mayo Clinic, Phoenix, United States of America
| | - D Liedl
- Mayo Clinic, Rochester, United States of America
| | - P Wennberg
- Mayo Clinic, Rochester, United States of America
| | - F Shamoun
- Mayo Clinic, Phoenix, United States of America
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19
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Kumar P, Murphy Z, Lenz S, Kaplan N, Lyass L, Yang S, Bhatt S, Perez White B. 228 Loss of EPHA2 represses GATA-3 function and causes a terminal differentiation defect. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bhatt S, Tseng AS, Girardo M, Firth C, Fortuin D, Liedl D, Wennberg P, Shamoun FE. P946Abnormal ankle brachial indices are associated with ischemic stroke: evidence from a large cohort study. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0540] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Peripheral arterial disease is a marker of aggressive atherosclerosis. The ankle brachial index (ABI) is a simple and non-invasive tool to diagnose peripheral arterial disease (PAD). Patients with PAD are at increased risk for ischemic strokes and other cardiovascular diseases.
Purpose
To evaluate the association of abnormal ABI and poorly compressible vessels with ischemic stroke in a large patient cohort.
Methods
We analyzed lower extremity vascular studies of all patients with ABI measurements at a tertiary care hospital between January 1996 and August 2018. PAD is defined as ABI<1.0, and poorly or non-compressible (PC/NC) arteries as ABI>1.4 while ABI between 1.0–1.4 is normal. Association of these ABIs with new ischemic stroke events post ABI measurement were analyzed after adjusting for high risk confounders such as atrial fibrillation. Hazard ratios (HR) were calculated using multivariable Cox proportional regression with 95% confidence intervals.
Results
In total, 38,016 unique patients (mean age 66.1±14.8 years, female 42.3%) were included. Abnormal ABI was found to be more prevalent among elderly male patients compared to patients with normal ABI. In contrast to non-PAD patients, both PAD and PC/NC patients as defined by ABI had a statistically significant risk of ischemic stroke, with PAD conferring the greatest risk compared to PC/NC vessels. The data is summarized in Table 1.
Table 1 Unadjusted HR p-value Adjusted HR p-value PAD vs. No PAD 2.77 (2.62, 2.92) <0.001 2.10 (1.98, 2.22) <0.001 PC/NC vs. No PAD 2.11 (1.95, 2.28) <0.001 1.38 (1.26, 1.51) <0.001 PAD vs. PC/NC 1.37 (1.28, 1.46) <0.001 1.37 (1.28, 1.48) <0.001 Adjusted and unadjusted hazard ratios with p-values. HR adjusted for age, sex, atrial fibrillation, ischemic stroke, transient ischemic attack, chronic heart failure, diabetes mellitus, hyperlipidemia, hypertension, and coronary artery disease. PAD = Peripheral artery disease and PC/NC = poorly compressible/non-compressible.
Conclusion
This study adds to the growing body of evidence that PAD and poorly-compressible vessels are independently associated with an increased risk of ischemic stroke. Given the associated risk of cerebrovascular disease, clinicians should aggressively treat to minimize risk factors in those with abnormal ABIs.
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Affiliation(s)
- S Bhatt
- Mayo Clinic Alix School of Medicine, Scottsdale, United States of America
| | - A S Tseng
- Mayo Clinic, Internal Medicine, Phoenix, United States of America
| | - M Girardo
- Mayo Clinic, Research Biostatistics, Phoenix, United States of America
| | - C Firth
- Mayo Clinic, Cardiovascular Medicine, Phoenix, United States of America
| | - D Fortuin
- Mayo Clinic, Cardiovascular Medicine, Phoenix, United States of America
| | - D Liedl
- Mayo Clinic, Cardiovascular Medicine, Rochester, United States of America
| | - P Wennberg
- Mayo Clinic, Cardiovascular Medicine, Rochester, United States of America
| | - F E Shamoun
- Mayo Clinic, Cardiovascular Medicine, Phoenix, United States of America
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21
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Kalejta CD, Higgins S, Kershberg H, Greenberg J, Alvarado M, Cooke K, Bhatt S, Bulpitt D, Armour J, Bejjani B, Ryan S, Elms A. Evaluation of an automated process for disclosure of negative noninvasive prenatal test results. J Genet Couns 2019; 28:847-855. [PMID: 31038280 DOI: 10.1002/jgc4.1127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 03/15/2019] [Accepted: 03/17/2019] [Indexed: 12/20/2022]
Abstract
We designed and implemented a novel automated negative non-invasive prenatal test (NIPT) result disclosure process using a proprietary, HIPAA-compliant web-based portal. High-risk pregnant patients who opted for NIPT from 04/2017 to 12/2018 were given the option to receive their negative result through the automated process. Patients were required to watch a brief educational video and answer evaluative questions before downloading their result. After completing the process, patients completed a survey regarding their opinion of the efficiency and convenience of the process and their satisfaction. A total of 10,170 women registered online during the study period, and 8,965 completed the automated process (88%). Out of 8,965 women, 2,121 women responded to the survey (24%). Most (2,030 of 2,101) strongly agreed/agreed that they could easily navigate the patient portal (97%); 1,852 of 1,966 strongly agreed/agreed that disclosure was efficient and convenient (94%); 1,852 of 1,960 strongly agreed/agreed that they felt informed after watching a short educational video (94%); and 1,903 of 1,967 strongly agreed/agreed that they preferred downloading results rather than waiting for their next doctor's appointment (97%). This study demonstrates high patient satisfaction with this automated and scalable solution in a high-volume health system. As the utilization of genetic testing increases, we predict greater need for innovative healthcare delivery models.
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Affiliation(s)
| | | | - Hilary Kershberg
- Department of Genetics, Southern California Permanente Medical Group, Pasadena, California
| | - Jeff Greenberg
- Department of Genetics, Southern California Permanente Medical Group, Pasadena, California
| | - Monica Alvarado
- Department of Genetics, Southern California Permanente Medical Group, Pasadena, California
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Kraemer MUG, Golding N, Bisanzio D, Bhatt S, Pigott DM, Ray SE, Brady OJ, Brownstein JS, Faria NR, Cummings DAT, Pybus OG, Smith DL, Tatem AJ, Hay SI, Reiner RC. Utilizing general human movement models to predict the spread of emerging infectious diseases in resource poor settings. Sci Rep 2019; 9:5151. [PMID: 30914669 PMCID: PMC6435716 DOI: 10.1038/s41598-019-41192-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 03/03/2019] [Indexed: 12/03/2022] Open
Abstract
Human mobility is an important driver of geographic spread of infectious pathogens. Detailed information about human movements during outbreaks are, however, difficult to obtain and may not be available during future epidemics. The Ebola virus disease (EVD) outbreak in West Africa between 2014–16 demonstrated how quickly pathogens can spread to large urban centers following one cross-species transmission event. Here we describe a flexible transmission model to test the utility of generalised human movement models in estimating EVD cases and spatial spread over the course of the outbreak. A transmission model that includes a general model of human mobility significantly improves prediction of EVD’s incidence compared to models without this component. Human movement plays an important role not only to ignite the epidemic in locations previously disease free, but over the course of the entire epidemic. We also demonstrate important differences between countries in population mixing and the improved prediction attributable to movement metrics. Given their relative rareness, locally derived mobility data are unlikely to exist in advance of future epidemics or pandemics. Our findings show that transmission patterns derived from general human movement models can improve forecasts of spatio-temporal transmission patterns in places where local mobility data is unavailable.
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Affiliation(s)
- M U G Kraemer
- Department of Zoology, University of Oxford, Oxford, UK. .,Harvard Medical School, Boston, MA, USA. .,Computational Epidemiology Lab, Boston Children's Hospital, Boston, MA, USA.
| | - N Golding
- Department of BioSciences, University of Melbourne, Parkville, VIC, Australia
| | - D Bisanzio
- RTI International, Washington, D.C., USA.,Epidemiology and Public Health Division, School of Medicine, University of Nottingham, Nottingham, UK
| | - S Bhatt
- Imperial College London, London, United Kingdom
| | - D M Pigott
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
| | - S E Ray
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
| | - O J Brady
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - J S Brownstein
- Harvard Medical School, Boston, MA, USA.,Computational Epidemiology Lab, Boston Children's Hospital, Boston, MA, USA
| | - N R Faria
- Department of Zoology, University of Oxford, Oxford, UK
| | - D A T Cummings
- Department of Biology, University of Florida, Gainesville, FL, USA.,Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
| | - O G Pybus
- Department of Zoology, University of Oxford, Oxford, UK
| | - D L Smith
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA.,Sanaria Institute for Global Health and Tropical Medicine, Rockville, USA
| | - A J Tatem
- WorldPop, Department of Geography and Environmental Sciences, University of Southampton, Southampton, UK.,Flowminder Foundation, Stockholm, Sweden
| | - S I Hay
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA.
| | - R C Reiner
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA.
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Waseem S, Bhatt S, Viswanathan S, Audet J. Statistical modeling to optimize the culture of mesenchymal stromal cells. Cytotherapy 2018. [DOI: 10.1016/j.jcyt.2018.02.158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Cable C, Kaplan N, Balu A, Bhatt S, Sia M, Perez White B. 860 EGFR proteomics reveals novel EphA2-dependent trafficking and signaling pathways in epidermal keratinocytes. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.871] [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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25
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Bhatt S, Gómez-Aristizábal A, Viswanathan S. Culture engineered mesenchymal stromal cells with enhanced anti-inflammatory and anti-angiogenic properties are therapeutically attractive for multiple indications. Cytotherapy 2017. [DOI: 10.1016/j.jcyt.2017.02.288] [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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26
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Read J, Viswanathan S, Bhatt S, Chaboureau A, Gomez-Aristizabal A, Weston A, Fazio A, Ogilvie-Harris D, Kapoor M, Keating A, Mahomed N, Marshall W, Naraghi A, Chahal J. Human autologous mesenchymal stromal cells for the treatment of mid- to late-stage knee osteoarthritis—preliminary results from a first-in-North America phase I/II study. Cytotherapy 2017. [DOI: 10.1016/j.jcyt.2017.02.042] [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: 11/27/2022]
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27
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Burstein R, Golding N, Osgood-Zimmerman A, Longbottom J, Dwyer-Lindgren L, Browne A, Earl L, Morozoff C, Lim S, Wang H, Flaxman A, Weiss D, Bhatt S, Farag T, Krause L, Dowell S, Gething P, Murray C, Moyes C, Hay S. High Spatial Resolution Mapping of Changing Inequalities in Child
Mortality Across Africa between 2000 and 2015. Ann Glob Health 2017. [DOI: 10.1016/j.aogh.2017.03.135] [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: 10/19/2022] Open
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Fosler L, Winters P, Jones KW, Curnow KJ, Sehnert AJ, Bhatt S, Platt LD. Aneuploidy screening by non-invasive prenatal testing in twin pregnancy. Ultrasound Obstet Gynecol 2017; 49:470-477. [PMID: 27194226 PMCID: PMC5396416 DOI: 10.1002/uog.15964] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 05/03/2016] [Accepted: 05/13/2016] [Indexed: 06/05/2023]
Abstract
OBJECTIVES To describe our experience with non-invasive prenatal testing (NIPT) in twin pregnancy. METHODS Two sets of maternal blood samples from twin pregnancies were analyzed at our laboratory using NIPT: 115 stored samples from pregnancies with known outcome (Clinical Study A) and 487 prospectively collected samples for which outcomes were requested from providers (Clinical Study B). NIPT was used to screen for the presence of fetal aneuploidy on chromosomes 13, 18, 21, X and Y in all cases, and results were compared with outcomes when known. RESULTS In Clinical Study A, all 115 samples were classified correctly by NIPT: three cases of trisomy 21 (one fetus affected), one of monochorionic trisomy 18 (both fetuses affected) and 111 euploid. In Clinical Study B, a NIPT result was reported for 479 (98.4%) of the 487 samples. Aneuploidy was detected or suspected in nine (1.9%) cases: seven cases of trisomy 21 detected, one case of trisomy 21 suspected and one case with trisomy 21 detected and trisomy 18 suspected. Information on aneuploidy outcome was available for 171 (35.7%) cases in Clinical Study B. Of the nine cases with aneuploidy detected or suspected, six were confirmed to be a true positive in at least one twin based on karyotype or birth outcome and two were suspected to be concordant based on ultrasound findings; the one known discordant result was for the aneuploidy suspected case. No false negatives were reported. CONCLUSION NIPT performed well in the detection of trisomy 21 in twin pregnancy, with a combined false-positive frequency for trisomies 13, 18 and 21 of 0% for Clinical Study A and 0.2% for Clinical Study B. © 2016 Illumina. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
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MESH Headings
- Adult
- Aneuploidy
- Chromosomes, Human, Pair 13/genetics
- Chromosomes, Human, Pair 18/genetics
- Chromosomes, Human, Pair 21/genetics
- Chromosomes, Human, X/genetics
- Chromosomes, Human, Y/genetics
- Female
- Genetic Testing/methods
- Humans
- Maternal Age
- Middle Aged
- Pregnancy
- Pregnancy, Twin
- Prenatal Diagnosis/methods
- Prospective Studies
- Young Adult
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Affiliation(s)
| | | | | | | | | | | | - L. D. Platt
- David Geffen School of MedicineUniversity of California Los AnglesLos AngelesCAUSA
- Center for Fetal Medicine and Women's UltrasoundLos AngelesCAUSA
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Jubin T, Kadam A, Jariwala M, Bhatt S, Sutariya S, Gani AR, Gautam S, Begum R. The PARP family: insights into functional aspects of poly (ADP-ribose) polymerase-1 in cell growth and survival. Cell Prolif 2016; 49:421-37. [PMID: 27329285 DOI: 10.1111/cpr.12268] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 05/04/2016] [Indexed: 12/21/2022] Open
Abstract
PARP family members can be found spread across all domains and continue to be essential molecules from lower to higher eukaryotes. Poly (ADP-ribose) polymerase 1 (PARP-1), newly termed ADP-ribosyltransferase D-type 1 (ARTD1), is a ubiquitously expressed ADP-ribosyltransferase (ART) enzyme involved in key cellular processes such as DNA repair and cell death. This review assesses current developments in PARP-1 biology and activation signals for PARP-1, other than conventional DNA damage activation. Moreover, many essential functions of PARP-1 still remain elusive. PARP-1 is found to be involved in a myriad of cellular events via conservation of genomic integrity, chromatin dynamics and transcriptional regulation. This article briefly focuses on its other equally important overlooked functions during growth, metabolic regulation, spermatogenesis, embryogenesis, epigenetics and differentiation. Understanding the role of PARP-1, its multidimensional regulatory mechanisms in the cell and its dysregulation resulting in diseased states, will help in harnessing its true therapeutic potential.
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Affiliation(s)
- T Jubin
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - A Kadam
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - M Jariwala
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - S Bhatt
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - S Sutariya
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - A R Gani
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - S Gautam
- Food Technology Division, Bhabha Atomic Research Centre, Mumbai, India
| | - R Begum
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
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Read J, Chaboureau A, Bhatt S, Viswanathan S. Strategy for in-House Validation of Endotoxin and Mycoplasma Tests and Discerning Matrix Effects for Canadian Regulatory Approval. Cytotherapy 2016. [DOI: 10.1016/j.jcyt.2016.03.118] [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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32
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Bhatt S, Gómez-Aristizábal A, Viswanathan S. Engineering Culture Methods for Manufacturing High Quality, Increased Potency Mesenchymal Stromal Cells (MSCs) in a Scalable, Economic, and Compliant Manner. Cytotherapy 2016. [DOI: 10.1016/j.jcyt.2016.03.183] [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: 10/21/2022]
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33
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Taneja PA, Prosen TL, de Feo E, Kruglyak KM, Halks-Miller M, Curnow KJ, Bhatt S. Fetal aneuploidy screening with cell-free DNA in late gestation. J Matern Fetal Neonatal Med 2016; 30:338-342. [DOI: 10.3109/14767058.2016.1172566] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
| | - Tracy L. Prosen
- Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, University of Minnesota, Minneapolis, MN, USA
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Bhatt S, Stender JD, Joshi S, Wu G, Katzenellenbogen BS. OCT-4: a novel estrogen receptor-α collaborator that promotes tamoxifen resistance in breast cancer cells. Oncogene 2016; 35:5722-5734. [PMID: 27065334 DOI: 10.1038/onc.2016.105] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 11/20/2015] [Accepted: 01/08/2016] [Indexed: 02/07/2023]
Abstract
Tamoxifen has shown great success in the treatment of breast cancer; however, long-term treatment can lead to acquired tamoxifen (TOT) resistance and relapse. TOT classically antagonizes estradiol (E2) -dependent breast cancer cell growth, but exerts partial agonist/antagonist behavior on gene expression. Although both E2 and TOT treatment of breast cancer cells results in recruitment of the estrogen receptor (ER) to common and distinct genomic sites, the mechanisms and proteins underlying TOT preferential recruitment of the ER remains poorly defined. To this end, we performed in silico motif-enrichment analyses within the ER-binding peaks in response to E2 or TOT, to identify factors that would specifically recruit ER to genomic binding sites in the presence of TOT as compared to E2. Intriguingly, we found Nkx3-1 and Oct-transcription factor homodimer motifs to be enriched in TOT preferential binding sites and confirmed the critical role of Oct-3/4 (aka Oct-4) in directing ER recruitment to TOT preferential genomic binding sites, by chromatin immunoprecipitation (ChIP) analyses. Further investigation revealed Oct-4 expression to be basally repressed by Nkx3-1 in MCF-7 cells and TOT treatment appeared to elevate Nkx3-1 degradation through a p38MAPK-dependent phosphorylation of the E3 ligase, Skp2 at serine-64 residue, as observed by quantitative mass-spectrometry analyses. Consistently, Oct-4 upon induction by phospho-Ser64-Skp2-mediated proteasomal degradation of Nkx3-1, participated in ER transcriptional complexes along with p38MAPK and Skp2 in a tamoxifen-dependent manner leading to TOT-dependent gene activation and cell proliferation of the TOT-resistant MCF-7-tamr breast cancer cells. Notably, Oct-4 levels were highly elevated in MCF-7-tamr cells, and appeared critical for their TOT sensitivity in cell proliferation assays. Furthermore, overexpression of Oct-4 enhanced tumor growth in the presence of tamoxifen in mice in vivo. Collectively, our work presents a novel mechanism for tamoxifen-specific gene activation by ER, secondary to its TOT preferential recruitment to genomic sites by specific activation of Oct-4, a phenomenon that appears to underlie tamoxifen resistance in breast cancer cells and in xenograft tumor models, and could be useful in designing therapeutic interventions to improve treatment outcome.
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Affiliation(s)
- S Bhatt
- Departments of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - J D Stender
- Departments of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - S Joshi
- Agilent Technologies, Cedar Creek, TX, USA
| | - G Wu
- Research Division, Joslin Diabetes Center, Harvard Medical School, Boston, MA, USA
| | - B S Katzenellenbogen
- Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
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Snyder HL, Curnow KJ, Bhatt S, Bianchi DW. Follow-up of multiple aneuploidies and single monosomies detected by noninvasive prenatal testing: implications for management and counseling. Prenat Diagn 2016; 36:203-9. [PMID: 26785403 PMCID: PMC5067681 DOI: 10.1002/pd.4778] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 01/12/2016] [Accepted: 01/15/2016] [Indexed: 12/17/2022]
Abstract
Objectives To determine the underlying biological basis for noninvasive prenatal testing (NIPT) results of multiple aneuploidies or autosomal monosomies. Methods Retrospective analysis of 113,415 tests to determine the study cohort, consisting of 138 (0.12%) cases reported as a single autosomal monosomy (n = 65), single trisomy with a sex chromosome aneuploidy (n = 36), or with multiple aneuploidies (n = 37). Clinical outcome information was reviewed and stratified into eight categories according to whether the karyotype or sonographic information agreed or disagreed with sequencing results. Results Of 67 cases with fetal or neonatal karyotypes available, 16 (24%) were partially or fully concordant with the NIPT result, 4 (6%) had aneuploidy on a reference chromosome, and 47 (70%) had normal fetal chromosomes, in which 5/47 had maternal malignancies reported. One case of maternal mosaic trisomy 8 was also detected. Of cases with no fetal karyotype information, ten had an abnormal clinical outcome, one was a normal live birth, and one reported maternal malignancy. Conclusions Noninvasive prenatal test results of autosomal monosomy or multiple aneuploidies are rare but have a diversity of underlying biologic causes. Some reflect the fetal karyotype; some reflect the presence of other maternal or fetal chromosome abnormalities, and a small number are linked to maternal disease. © 2016 Illumina. Prenatal Diagnosis published by John Wiley & Sons, Ltd. What's already known about this topic?Noninvasive prenatal testing (NIPT) has been validated for common autosomal trisomies (trisomy 21, 18, and 13), sex chromosome aneuploidies, and a selection of microdeletion syndromes. NIPT findings that are discordant with the fetal karyotype can be because of biological reasons, such as confined placental mosaicism, maternal chromosome abnormalities, and other maternal conditions such as occult malignancy.
What does this study add?Clinical and karyotype outcome information for cases that received an NIPT result indicating an autosomal monosomy or multiple aneuploidies. Some autosomal monosomy and multiple aneuploidy results reflect the true fetal karyotype, and some are explained by other factors, such as other fetal or maternal chromosomal abnormalities or maternal disease. This information will help providers with post‐test counseling for these rare and unusual results.
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Affiliation(s)
| | | | | | - Diana W Bianchi
- Mother Infant Research Institute, Tufts Medical Center, Boston, MA, USA
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Taneja PA, Snyder HL, de Feo E, Kruglyak KM, Halks-Miller M, Curnow KJ, Bhatt S. Noninvasive prenatal testing in the general obstetric population: clinical performance and counseling considerations in over 85 000 cases. Prenat Diagn 2016; 36:237-43. [PMID: 26715197 PMCID: PMC4819889 DOI: 10.1002/pd.4766] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 11/25/2015] [Accepted: 12/23/2015] [Indexed: 12/24/2022]
Abstract
Objective The primary goal of this study was to provide clinically relevant information for appropriate patient counseling. Method Demographics and test metrics were reviewed for 86 658 clinical cases. Outcome information was requested for samples reported as aneuploidy detected or suspected for chromosomes 21, 18, or 13; voluntary outcome reporting was encouraged for all discordant outcomes. Results Of 86 658 cases, 85 298 (98.4%) met inclusion criteria for result reporting. Of the 1360 (1.6%) cancellations, only 101 (0.1%) were for technical reasons. Average time to result was 3.3 business days. Aneuploidy was detected or suspected in 2142 (2.5%) samples. For aneuploidy detected cases with known clinical outcomes, the overall positive predictive value (PPV) was 83.5% (608/728); observed PPVs for trisomies 21, 18, and 13 ranged from 50.0 to 92.8%. As individual PPVs are determined by a patient's prior risk, we developed a chart for counseling patients on positive predictive value based on maternal age. Conclusion This large‐scale report reinforces that noninvasive prenatal testing is a highly accurate screen for fetal aneuploidy in the general obstetric population. Test improvements have facilitated a reduction in failure rates, time to result, and borderline results/unclassifiable results. We have developed a positive predictive value counseling tool to ensure appropriate patient education, counseling, and clinical utilization. © 2015 Illumina. Prenatal Diagnosis published by John Wiley & Sons, Ltd. What's already known about this topic?Noninvasive prenatal testing (NIPT) has been shown to screen for common fetal aneuploidies with high sensitivity and low false positive rates. NIPT is a reliable alternative to current fetal aneuploidy serum screening methods in the first and second trimesters. Previous publications detailing NIPT clinical experience have shown that NIPT is performing as well as it performed in clinical validation studies.
What does this study add?Analysis of over 85 000 samples submitted to the clinical laboratory suggests that whole genome sequencing‐based NIPT continues to meet or exceed performance characteristics established by clinical validation studies for screening of fetal aneuploidy. A tool to guide appropriate pre‐test and post-test counseling of patients on estimated positive predictive values based on their personal maternal-age based risk, with recommendations for effective implementation into clinical practice.
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Chavan R, Tewari S, Khedkar C, Bhatt S. World Health Organization. Encyclopedia of Food and Health 2016. [PMCID: PMC7149735 DOI: 10.1016/b978-0-12-384947-2.00761-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The World Health Organization, situated in Geneva, Switzerland, since its establishment on 7 April 1948, is working for the betterment of health and sanitary conditions across the globe through its six regional offices spanning the different continents. It has a well-laid network of trained personnel working in a transparent fashion for its various committees and projects for the eradication of epidemics such as malaria, cholera, and smallpox while providing both quantitative and qualitative data for the preparation of documents on technological, procedural, statistical, and developmental fronts on various health-related issues. It has extended help to the UN in achieving the Millennium Development Goals target and has shown prompt and efficient action against Ebola outbreak in West Africa in 2014 and is also involved in establishing food security and safety in African and South Asian subcontinent.
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Bhatt S, Guleria R, Vikram N, Nandhan V, Yadav Y, Gupta A. Genetic variation in the insulin receptor substrate-1 gene in Asian Indians with obstructive sleep apnea and non alcoholic fatty liver disease. Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.010] [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: 10/22/2022]
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Bhatt S, Gujarathi S, De Benedictis M. Innovative DES technologies from Meril. Minerva Cardioangiol 2015; 63:441-448. [PMID: 25921933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Technological advances and rise in global urbanity have paradoxically led to an increase in the incidence of metabolic syndrome and thankfully also in diagnosis and treatment of coronary artery disease. "Necessity is the mother of invention" - remarked Plato and this statement could not have had a better place than in the field of angioplasty and stenting. Interventional cardiology still continues to remain a busy place for smart, iterative changes leading to better treatment options. This article sketches contemporary trends in coronary stent engineering borne out of unmet clinical needs ranging from novel ultra-thin strut designs marrying biodegradable polymeric drug eluting platforms to anatomically tapered stents and finally the intuitive bioresorbable vascular scaffolds which promise freedom from full metal jacket.
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Affiliation(s)
- S Bhatt
- Meril Life Sciences, Gujarat, India -
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Bianchi DW, Chudova D, Sehnert AJ, Bhatt S, Murray K, Prosen TL, Garber JE, Wilkins-Haug L, Vora NL, Warsof S, Goldberg J, Ziainia T, Halks-Miller M. Noninvasive Prenatal Testing and Incidental Detection of Occult Maternal Malignancies. JAMA 2015; 314:162-9. [PMID: 26168314 DOI: 10.1001/jama.2015.7120] [Citation(s) in RCA: 273] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
IMPORTANCE Understanding the relationship between aneuploidy detection on noninvasive prenatal testing (NIPT) and occult maternal malignancies may explain results that are discordant with the fetal karyotype and improve maternal clinical care. OBJECTIVE To evaluate massively parallel sequencing data for patterns of copy-number variations that might prospectively identify occult maternal malignancies. DESIGN, SETTING, AND PARTICIPANTS Case series identified from 125,426 samples submitted between February 15, 2012, and September 30, 2014, from asymptomatic pregnant women who underwent plasma cell-free DNA sequencing for clinical prenatal aneuploidy screening. Analyses were conducted in a clinical laboratory that performs DNA sequencing. Among the clinical samples, abnormal results were detected in 3757 (3%); these were reported to the ordering physician with recommendations for further evaluation. EXPOSURES NIPT for fetal aneuploidy screening (chromosomes 13, 18, 21, X, and Y). MAIN OUTCOMES AND MEASURES Detailed genome-wide bioinformatics analysis was performed on available sequencing data from 8 of 10 women with known cancers. Genome-wide copy-number changes in the original NIPT samples and in subsequent serial samples from individual patients when available are reported. Copy-number changes detected in NIPT sequencing data in the known cancer cases were compared with the types of aneuploidies detected in the overall cohort. RESULTS From a cohort of 125,426 NIPT results, 3757 (3%) were positive for 1 or more aneuploidies involving chromosomes 13, 18, 21, X, or Y. From this set of 3757 samples, 10 cases of maternal cancer were identified. Detailed clinical and sequencing data were obtained in 8. Maternal cancers most frequently occurred with the rare NIPT finding of more than 1 aneuploidy detected (7 known cancers among 39 cases of multiple aneuploidies by NIPT, 18% [95% CI, 7.5%-33.5%]). All 8 cases that underwent further bioinformatics analysis showed unique patterns of nonspecific copy-number gains and losses across multiple chromosomes. In 1 case, blood was sampled after completion of treatment for colorectal cancer and the abnormal pattern was no longer evident. CONCLUSIONS AND RELEVANCE In this preliminary study, a small number of cases of occult malignancy were subsequently diagnosed among pregnant women whose noninvasive prenatal testing results showed discordance with the fetal karyotype. The clinical importance of these findings will require further research.
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Affiliation(s)
- Diana W Bianchi
- Mother Infant Research Institute, Tufts Medical Center, Boston, Massachusetts
| | | | | | | | - Kathryn Murray
- Center for Genetics and Maternal Fetal Medicine, Springfield, Oregon
| | - Tracy L Prosen
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Minnesota, Minneapolis
| | | | - Louise Wilkins-Haug
- Division of Maternal Fetal Medicine and Reproductive Genetics, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts
| | | | - Stephen Warsof
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Norfolk
| | - James Goldberg
- San Francisco Perinatal Associates, San Francisco, California
| | - Tina Ziainia
- Sharp Rees-Stealy Medical Group, San Diego, California
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Avasthi R, Sharma A, Ranga G, Bhatt S, Banerjee B. Antihypertensive effect of rosuvastatin in normocholesterolemic hypertensive patients and its association with flow mediated dilation and oxidative stress. Indian Heart J 2014. [DOI: 10.1016/j.ihj.2014.10.254] [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: 11/15/2022] Open
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Abstract
Congenital diverticulum of male urethra is an uncommon entity. Neglected management complicates the process in the form of calculi formation and recurrent urinary infection. A 10-year-old boy presented with urinary voiding disturbances and development of a painless hard lump at the penoscrotal junction. Imaging demonstrated presence of anterior urethral diverticulum with contained calculi in it. Open urethral diverticulectomy, extraction of multiple calculi, and primary urethral reconstruction over a Foley catheter was carried out. Early diagnosis and individualized surgical management of congenital male urethral diverticulum is the key to a successful outcome.
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Affiliation(s)
- D Mohanty
- Department of Surgery, University College of Medical Sciences and Guru Teg Bahadur Hospital, University of Delhi, New Delhi, India
| | - Pk Garg
- Department of Surgery, University College of Medical Sciences and Guru Teg Bahadur Hospital, University of Delhi, New Delhi, India
| | - Bk Jain
- Department of Surgery, University College of Medical Sciences and Guru Teg Bahadur Hospital, University of Delhi, New Delhi, India
| | - S Bhatt
- Department of Radiology, University College of Medical Sciences and Guru Teg Bahadur Hospital, University of Delhi, New Delhi, India
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Futch T, Spinosa J, Bhatt S, de Feo E, Rava RP, Sehnert AJ. Initial clinical laboratory experience in noninvasive prenatal testing for fetal aneuploidy from maternal plasma DNA samples. Prenat Diagn 2014; 33:569-74. [PMID: 23592485 PMCID: PMC3709117 DOI: 10.1002/pd.4123] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Objective The aim of this study is to report the experience of noninvasive prenatal DNA testing using massively parallel sequencing in an accredited clinical laboratory. Methods Laboratory information was examined for blood samples received for testing between February and November 2012 for chromosome 21 (Chr21), Chr18, and Chr13. Monosomy X (MX) testing was available from July 2012 for cystic hygroma indication. Outcomes were collected from providers on samples with positive results. Results There were 5974 samples tested, and results were issued within an average of 5.1 business days. Aneuploidy was detected in 284 (4.8%) samples (155 Chr21, 66 Chr18, 19 Chr13, 40 MX, and four double aneuploidy). Follow-ups are available for 245/284 (86%), and 77/284 (27.1%) are confirmed, including one double-aneuploidy case concordant with cytogenetics from maternal malignancy. Fourteen (0.2%) discordant (putative false-positive) results (one Chr21, six Chr18, three Chr13, three MX, and one Chr21/13) have been identified. Five (0.08%) false-negative cases are reported (two trisomy 21, two trisomy 18, and one MX). In 170 (2.8%) cases, the result for a single chromosome was indefinite. Conclusions This report suggests that clinical testing of maternal cell-free DNA for fetal aneuploidy operates within performance parameters established in validation studies. Noninvasive prenatal testing is sensitive to biological contributions from placental and maternal sources. ©2013 Verinata Health, Inc. Prenatal Diagnosis published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Tracy Futch
- Genetic Services, Verinata Health, Inc., Redwood City, CA, USA
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Swanson A, Sehnert AJ, Bhatt S. Non-invasive Prenatal Testing: Technologies, Clinical Assays and Implementation Strategies for Women's Healthcare Practitioners. Curr Genet Med Rep 2013; 1:113-121. [PMID: 23687624 PMCID: PMC3655220 DOI: 10.1007/s40142-013-0010-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The field of prenatal genetic testing has exploded with new non-invasive technologies and test options in the past several years. It is challenging for women's healthcare providers to keep up with the multitude of publications and provide patients with the most accurate and up-to-date information possible regarding prenatal testing. In this article, we examine the sequencing technologies that provide the framework for non-invasive prenatal testing (NIPT) and review the major North American NIPT clinical validation studies published in 2011 and 2012. This paper also compares and contrasts the commercially available non-invasive prenatal tests in the United States, discusses clinical implementation recommendations from professional societies and highlights considerations for genetic counseling.
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Affiliation(s)
- Amy Swanson
- Department of Clinical Affairs, Verinata Health, an Illumina Company, 800 Saginaw Drive, Redwood City, CA 94063 USA
| | - Amy J. Sehnert
- Department of Clinical Affairs, Verinata Health, an Illumina Company, 800 Saginaw Drive, Redwood City, CA 94063 USA
| | - Sucheta Bhatt
- Department of Clinical Affairs, Verinata Health, an Illumina Company, 800 Saginaw Drive, Redwood City, CA 94063 USA
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Mahesh R, Bhatt S, Devadoss T, Jindal A, Gautam B, Pandey D. Antidepressant Potential of 5-HT3 Receptor Antagonist, N-n- propyl-3-ethoxyquinoxaline-2-carboxamide (6n). J Young Pharm 2013; 4:235-44. [PMID: 23493308 PMCID: PMC3573375 DOI: 10.4103/0975-1483.104367] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The present study was designed to evaluate the antidepressant potential of 5-HT3 receptor antagonist N-n-propyl-3-ethoxyquinoxaline-2-carboxamide (6n). The compound ‘6n’ with optimum log P and pA2 value identified from a series of compounds synthesized in our laboratory was subjected to forced Swim Test (FST) (1, 2, and 4 mg/kg, i.p) and Tail Suspension Test (TST) (1, 2, and 4 mg/kg, i.p.). The compound ‘6n’ significantly reduced the duration of immobility in mice without affecting the baseline locomotion. Moreover, ‘6n’ (2 mg/kg, i.p.) potentiated the 5-hydroxytryptophan (5-HTP)-induced head twitch responses in mice and ‘6n’ at tested dose (1 and 2 mg/kg, i.p.) reversed the reserpine-induced hypothermia in rats. In interaction studies of ‘6n’ with various standard drugs/ligands using FST, ‘6n’ (1 mg/kg, i.p.) potentiated the antidepressant effect of venlafaxine (4 and 8 mg/kg, i.p.) and fluoxetine (10 and 20 mg/kg, i.p.). Additionally, ‘6n’ (1 and 2 mg/kg, i.p.) influenced the effect of harmane (5 mg/ kg, i.p.) as well as reversed the effect of parthenolide (1 mg/kg, i.p.) by reducing the duration of immobility in FST. Furthermore, ‘6n’ (1 mg/kg, i.p.) potentiated the effect of bupropion (10 and 20 mg/kg, i.p.) in TST. Chronic ‘6n’ (1 and 2 mg/kg, i.p.) treatment attenuated the behavioral abnormalities in olfactory bulbectomized rats. In conclusion, these various findings reiterated the antidepressant-like effects of ‘6n’ in behavioral models of depression.
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Affiliation(s)
- R Mahesh
- Department of Pharmacy, FD-III, Birla Institute of Technology and Science, Pilani, Rajasthan, India
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Bhatt S, Lam TT, Lycett SJ, Leigh Brown AJ, Bowden TA, Holmes EC, Guan Y, Wood JLN, Brown IH, Kellam P, Pybus OG. The evolutionary dynamics of influenza A virus adaptation to mammalian hosts. Philos Trans R Soc Lond B Biol Sci 2013; 368:20120382. [PMID: 23382435 DOI: 10.1098/rstb.2012.0382] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Few questions on infectious disease are more important than understanding how and why avian influenza A viruses successfully emerge in mammalian populations, yet little is known about the rate and nature of the virus' genetic adaptation in new hosts. Here, we measure, for the first time, the genomic rate of adaptive evolution of swine influenza viruses (SwIV) that originated in birds. By using a curated dataset of more than 24 000 human and swine influenza gene sequences, including 41 newly characterized genomes, we reconstructed the adaptive dynamics of three major SwIV lineages (Eurasian, EA; classical swine, CS; triple reassortant, TR). We found that, following the transfer of the EA lineage from birds to swine in the late 1970s, EA virus genes have undergone substantially faster adaptive evolution than those of the CS lineage, which had circulated among swine for decades. Further, the adaptation rates of the EA lineage antigenic haemagglutinin and neuraminidase genes were unexpectedly high and similar to those observed in human influenza A. We show that the successful establishment of avian influenza viruses in swine is associated with raised adaptive evolution across the entire genome for many years after zoonosis, reflecting the contribution of multiple mutations to the coordinated optimization of viral fitness in a new environment. This dynamics is replicated independently in the polymerase genes of the TR lineage, which established in swine following separate transmission from non-swine hosts.
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Affiliation(s)
- S Bhatt
- Department of Zoology, University of Oxford, Oxford, UK
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Kaul U, Bhatt S, Vasani P. Evolving coronary stent designs. Journey from substance to sublime. Minerva Cardioangiol 2013; 61:81-88. [PMID: 23381383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Coronary artery disease continues to remain a global health care burden. Paradoxical changes in global economies have redefined future development and consumption markets. Within the next decade the need for high quality, low cost coronary stents may reach up to 10 million units. Parallel changes in technological trends further necessitate ingenuity in coronary stent development. Developing nations, armed with novel technologies, supported with low development costs and access to high end manufacturing are poised to serve the global demands of future coronary stent requirements. New concepts in DES engineering employing novel stent designs, drug delivery technologies and affordable DES systems will effectively bridge the need gap between metal backed DES and its ultimate nemesis the bioresorbable scaffold.
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Affiliation(s)
- U Kaul
- Fortis Escorts Heart Institute and Research Center, New Delhi, India.
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Lycett SJ, Baillie G, Coulter E, Bhatt S, Kellam P, McCauley JW, Wood JLN, Brown IH, Pybus OG, Leigh Brown AJ. Estimating reassortment rates in co-circulating Eurasian swine influenza viruses. J Gen Virol 2012; 93:2326-2336. [PMID: 22971819 PMCID: PMC3542128 DOI: 10.1099/vir.0.044503-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 07/24/2012] [Indexed: 12/22/2022] Open
Abstract
Swine have often been considered as a mixing vessel for different influenza strains. In order to assess their role in more detail, we undertook a retrospective sequencing study to detect and characterize the reassortants present in European swine and to estimate the rate of reassortment between H1N1, H1N2 and H3N2 subtypes with Eurasian (avian-like) internal protein-coding segments. We analysed 69 newly obtained whole genome sequences of subtypes H1N1-H3N2 from swine influenza viruses sampled between 1982 and 2008, using Illumina and 454 platforms. Analyses of these genomes, together with previously published genomes, revealed a large monophyletic clade of Eurasian swine-lineage polymerase segments containing H1N1, H1N2 and H3N2 subtypes. We subsequently examined reassortments between the haemagglutinin and neuraminidase segments and estimated the reassortment rates between lineages using a recently developed evolutionary analysis method. High rates of reassortment between H1N2 and H1N1 Eurasian swine lineages were detected in European strains, with an average of one reassortment every 2-3 years. This rapid reassortment results from co-circulating lineages in swine, and in consequence we should expect further reassortments between currently circulating swine strains and the recent swine-origin H1N1v pandemic strain.
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Affiliation(s)
- S. J. Lycett
- Institute of Evolutionary Biology, University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh EH9 3JT, UK
| | - G. Baillie
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, UK
| | - E. Coulter
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, UK
| | - S. Bhatt
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, UK
- Department of Zoology, University of Oxford, The Tinbergen Building, South Parks Road, Oxford OX1 3PS, UK
| | - P. Kellam
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, UK
| | - J. W. McCauley
- Division of Virology, MRC National Institute for Medical Research, Mill Hill, London NW7 1AA, UK
| | - J. L. N. Wood
- Cambridge Infectious Diseases Consortium, Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, UK
| | - I. H. Brown
- Animal Health and Veterinary Laboratories Agency – Weybridge, Addlestone, Surrey, KT15 3NB, UK
| | - O. G. Pybus
- Department of Zoology, University of Oxford, The Tinbergen Building, South Parks Road, Oxford OX1 3PS, UK
| | - A. J. Leigh Brown
- Institute of Evolutionary Biology, University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh EH9 3JT, UK
| | - for the Combating Swine Influenza Initiative (COSI) Consortium
- Institute of Evolutionary Biology, University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh EH9 3JT, UK
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, UK
- Department of Zoology, University of Oxford, The Tinbergen Building, South Parks Road, Oxford OX1 3PS, UK
- Division of Virology, MRC National Institute for Medical Research, Mill Hill, London NW7 1AA, UK
- Cambridge Infectious Diseases Consortium, Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, UK
- Animal Health and Veterinary Laboratories Agency – Weybridge, Addlestone, Surrey, KT15 3NB, UK
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Venner KL, Greenfield BL, Vicuña B, Muñoz R, Bhatt S, O'Keefe V. "I'm not one of them": barriers to help-seeking among American Indians with alcohol dependence. Cultur Divers Ethnic Minor Psychol 2012; 18:352-362. [PMID: 22985245 DOI: 10.1037/a0029757] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The majority of people with alcohol use disorders do not seek formal treatment. Research on barriers to help-seeking have only recently focused on ethnic minority populations. The present study investigated the extent to which an adult American Indian (AI) sample experienced similar and/or unique barriers to help-seeking as have been reported in the literature. Using both qualitative and quantitative methods, 56 (54% male) AIs with lifetime alcohol dependence completed a semistructured face-to-face interview and a self-administered written survey. Interviews were tape recorded, transcribed, and coded for four major themes: personal barriers, pragmatic barriers, concerns about seeking help, and social network barriers. Quantitative data provided percentage endorsing each survey item and strength of each barrier, which were categorized according to the four major themes. In previous research, most barriers questionnaires have not queried for cultural concerns or how the specific type of help may be a mismatch from the client's perspective. Given the rapidly changing racial/ethnic demography in the United States, further research addressing cultural and spiritual concerns as well as more common barriers is indicated. (PsycINFO Database Record (c) 2012 APA, all rights reserved).
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Affiliation(s)
| | | | | | - Rosa Muñoz
- Department of Psychology, University of New Mexico
| | - S Bhatt
- Department of Psychiatry & Addiction Substance Abuse Program (ASAP), University of New Mexico
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