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Devarajan R, Singh K, Kondal D, Shivashankar R, Narayan K, Prabhakaran D, Tandon N, Ali M. MS02.9 Association of Body Mass Index and Other Cardiovascular Risk Factors With Diabetic Retinopathy Among People With Poorly-Controlled Type 2 Diabetes Mellitus In South Asia: The CARRS Trial. Glob Heart 2018. [DOI: 10.1016/j.gheart.2018.09.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Soni D, Chandrasekaran A, Singh K, Singh K, Mohan B, Negi P, Chattopadhyay K, Vamadevan A, Prabhakaran D, Kinra S. PO137 Gender Differences In Physiological and Behavioral Risk Factors Among Patients With Acute Myocardial Infarction: Findings From the Yoga-Care Trial. Glob Heart 2018. [DOI: 10.1016/j.gheart.2018.09.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Yoo S, Singh K, Shivashankar R, Huffman M, Kadir M, Ali M, Mohan V, Narayan K, Tandon N, Prabhakaran D. PO531 Primary and Secondary Prevention of Cardiovascular Diseases In Three South Asian Metropolitan Cities: Analysis of Self-Reported Medication Use In Community-Based CARRS Study. Glob Heart 2018. [DOI: 10.1016/j.gheart.2018.09.407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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104
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Hava D, Tan L, Johnson P, Curran A, Perry J, Kramer S, Kane K, Bedwell P, Henderson D, Layton G, Singh K, Connor L, Singh D, Roach J. A PHASE 1/1B STUDY OF AN INHALED FORMULATION OF ITRACONAZOLE IN HEALTHY VOLUNTEERS AND ASTHMATICS. Ann Allergy Asthma Immunol 2018. [DOI: 10.1016/j.anai.2018.09.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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105
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Singh K, Kouli O, Kanodia A, Goodman C, Eadie E, Ibbotson S, Hossain-Ibrahim K. P01.142 Comparing Outcomes in Glioblastoma Multiforme patients undergoing Photodynamic Therapy with a Second-Generation Photosensitiser vs 5-Aminolevulinic Acid - A Single Site Retrospective Analysis. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.184] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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106
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Phillips A, Sundar S, Singh K, Pounds R, Nevin J, Kehoe S, Balega J, Elattar A. The NICE classification for 'Ultra-radical (extensive) surgery for advanced ovarian cancer' guidance does not meaningfully predict postoperative complications: a cohort study. BJOG 2018; 126:96-104. [PMID: 30092615 DOI: 10.1111/1471-0528.15423] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/16/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To determine which descriptors of cytoreductive surgical extent in advanced ovarian cancer (AOC) best predict postoperative morbidity. DESIGN Retrospective notes review. SETTING A gynaecological cancer centre in the UK. POPULATION Six hundred and eight women operated on for AOC over a period of 114 months at a tertiary cancer centre, between 16 August 2007 and 16 February 2017. METHODS Outcome data were analysed by six approaches to classify the extent of surgery: standard/ultra-radical surgery; standard/radical/supra-radical surgery; presence/absence of gastrointestinal resections; low/intermediate/high surgical complexity score (SCS); presence of bowel anastomoses and/or diaphragmatic surgery; and the presence/absence of multiple bowel resections. MAIN OUTCOME MEASURES Major (grades 3-5) postoperative morbidity and mortality. RESULTS Forty-three (7.1%) patients experienced major complications. Grade-5 complications occurred in six patients (1.0%). Patients who underwent multiple bowel resections had a relative risk (RR) of 7.73 (95% confidence interval, 95% CI 3.92-15.26), patients with a high SCS had an RR of 6.12 (95% CI 3.25-11.52), patients with diaphragmatic surgery and gastrointestinal anastomosis had an RR of 5.57 (95% CI 2.65-11.72), patients with 'any gastrointestinal resection' had an RR of 4.69 (95% CI 2.66-8.24), patients with ultra-radical surgery had an RR of 4.65 (95% CI 2.26-8.79), and patients with supra-radical surgery had an RR of 4.20 (95% CI 2.35-7.51) of grades 3-5 morbidity, compared with patients undergoing standard surgery as defined by the National Institute for Health and Care Excellence (NICE) in the UK. No significant difference was seen in the rate of major morbidity between standard (6/59, 10.2%) and ultra-radical (9/81, 11.1%) surgery within the cohort who had intermediate complex surgery (P > 0.05). CONCLUSIONS The numbers of procedures performed significantly correlate with major morbidity. The number of procedures performed better predicted major postoperative morbidity than the performance of certain 'high risk' procedures. We recommend using SCS to define a higher risk operation. NICE should re-evaluate the use of the term 'ultra-radical' surgery. TWEETABLE ABSTRACT Multiple bowel resection is the best predictor of morbidity and is more predictive than 'ultra-radical surgery'.
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Piao Z, Singh K, Chowdhury M, Gardecki J, Nishimiya K, Yin B, Beatty M, Bablouzian A, Giddings S, Mauskapf A, Jaffer FA, Tearney G. TCT-56 High-resolution Intravascular OCT-NIRF Molecular Imaging for In Vivo Assessment of Inflammation in Atherosclerosis and Vascular Injury. J Am Coll Cardiol 2018. [DOI: 10.1016/j.jacc.2018.08.1143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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108
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Nishimiya K, Sharma G, Singh K, Osman H, Gardecki JA, Tearney GJ. P2772A novel approach for uric acid crystal detection in human coronary arteries with polarization-sensitive micro-OCT. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2772] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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109
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Singh K, Subhaharan D, Mridha N. P5525A meta-analysis of randomised controlled trials to compare safety and efficacy of everolimus/sirolimus bioabsorbable polymer with second-generation durable-polymer drug eluting stents. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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110
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Singh K, Rohilla A. Sex determination by stapes. J ANAT SOC INDIA 2018. [DOI: 10.1016/j.jasi.2018.06.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Singh K, Subhaharan D, Mridha N. P5529A five-year follow-up of randomised studies comparing outcomes between bioabsorbable-polymer and durable-polymer drug-eluting stents: systematic review and meta-analysis. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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112
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Singh G, Rathi AK, Singh K, Sharma D. Venous thromboembolism in cancer patients - magnitude of problem, approach, and management. Indian J Cancer 2018; 54:308-312. [PMID: 29199711 DOI: 10.4103/ijc.ijc_101_17] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Cancer is hypercoagulable state. Patients with cancer are at high risk to develop venous thromboembolism (VTE). Relative risk of developing VTE is approximately seven times higher in patients with active cancer. The incidence of occult malignancy is 7%-12% in patients with idiopathic deep vein thrombosis (DVT). However, little research has been focused on cancer with thromboembolism. Lowmolecularweight heparin most frequently used pharmacologic agents as recommended by established guidelines. The aim was to evaluate the magnitude of problem in cancer patients and treatment option as per established guidelines. EMBASE, MEDLINE, and PubMed search of the literature were done to evaluate the association of DVT with various malignancy, magnitude of problem, approach, and various guidelines for the management of DVT. References of all publication were also searched to enrich this article for recent update. Thromboprophylaxis in cancer patient is gray zone area. This need lot of investigational work to find highrisk patients who would benefit from primary thromboprophylaxis.
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Tan T, Singh K, Coats M, Wilson M. Routine pre-operative group and save in minimally invasive laparoscopic surgery: A misuse of healthcare resources or a preventive measure? Int J Surg 2018. [DOI: 10.1016/j.ijsu.2018.05.569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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114
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Morgan C, Teshome M, Crocker-Buque T, Bhudia R, Singh K. Medical education in difficult circumstances: analysis of the experience of clinical medical students following the new innovative medical curriculum in Aksum, rural Ethiopia. BMC MEDICAL EDUCATION 2018; 18:119. [PMID: 29855298 PMCID: PMC5984342 DOI: 10.1186/s12909-018-1199-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 04/20/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND In 2012, 12 medical schools were opened in Ethiopia to tackle the significant shortage of doctors. This included Aksum School of Medicine situated in Aksum, a rural town in Northern Ethiopia. The new Innovative Medical Curriculum (NIMC) is a four-year programme designed by the Ethiopian Federal Ministries of Health and Education. The curriculum is designed to train biomedical science graduates to become doctors in 4 years, with a focus on the healthcare needs of rural people living in poverty. METHODS This research was conducted at Aksum School of Medicine and included two hospitals (Aksum Referral Hospital and St Mary's District Hospital). This study focused on medical students during their clinical years across multiple specialities (61 Clerkship 1 students and 13 Clerkship 2 students). We used primarily qualitative research methods supplemented with quantitative measures. There were 3 stages of data collection over a 1 month period, this included qualitative group interviews, direct observation of students in a clinical setting and direct observation of skills sessions followed by a questionnaire on the sessions. We analysed the data by reconstructing the student experience and comparing it with the NIMC. RESULTS The proposed typical week set out in the NIMC tended to differ from the real clinical experience of these students. Through qualitative group interview and direct observation of teaching, the main theme that was consistent throughout was the lack of doctors with specialist postgraduate training. Clinical need often took priority over education. However, students enjoyed taking early responsibility and gaining practical experience. Through direct observation of skills sessions and short questionnaires, these sessions were highly valuable to the students and they felt confident in carrying out the taught procedures in the future. CONCLUSIONS The combination of poorly resourced hospitals and lack of specialist doctors provides a challenging environment for medical students to learn. However, it is a unique clinical experience that is rarely seen in developed countries and facilitates the acquirement of skills from an early stage. Supervision and specialist input is fundamental in enabling students to learn and this is a key area that was lacking in the students' clinical experience.
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Basu A, Munir S, Mulaw M, Singh K, Herold B, Crisan D, Sindrilaru A, Treiber N, Wlaschek M, Huber-Lang M, Gebhard F, Scharffetter-Kochanek K. 1422 A novel S100A8/A9 induced fingerprint of mesenchymal stem cells is associated with enhanced wound healing. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.1440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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116
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Rangarao R, Smruti BK, Singh K, Gupta A, Batra S, Choudhary RK, Gupta A, Sahani S, Kabra V, Parikh PM, Aggarwal S. Practical consensus recommendations on management of triple-negative metastatic breast cancer. South Asian J Cancer 2018; 7:127-131. [PMID: 29721479 PMCID: PMC5909290 DOI: 10.4103/sajc.sajc_118_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Patients with breast cancer along with metastatic estrogen and progesterone receptor (ER/PR)- and human epidermal growth factor receptor 2 (HER2)-negative tumors are referred to as having metastatic triple-negative breast cancer (mTNBC) disease. Resistance to current standard therapies such as anthracyclines or taxanes limits the available options for previously treated patients with metastatic TNBC to a small number of non-cross-resistant regimens, and there is currently no preferred standard chemotherapy. Clinical experience suggests that many women with triple-negative metastatic breast cancer (MBC) relapse quickly. Expert oncologist discussed about new chemotherapeutic strategies and agents used in treatment of mTNBC and the expert group used data from published literature, practical experience and opinion of a large group of academic oncologists to arrive at this practical consensus recommendations for the benefit of community oncologists.
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Singh K, Blümich B. Compact low-field NMR spectroscopy and chemometrics: A tool box for quality control of raw rubber. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.02.057] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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118
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Kunnanchath J, Dufan T, Malik N, Salah A, Knight V, Singh K, Smith T. EP-1793: Establishing local confidence limit and the optimization of VMAT patient specific quality assurance. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)32102-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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119
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Singh K, Batouli A, Buck D. 4:03 PM Abstract No. 20 Splenic artery embolization: does severity of injury, type of embolic agent used, or location of embolization affect outcomes? J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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120
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Kulshrestha R, Rathi A, Kapoor S, Singh K, Arora S, Polipalli S, Jindal A. EP-2297: Biodosimetry of head and neck cancer patients undergoing radiation therapy. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)32606-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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121
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Singh K, Savin J, Savin M, Wong C. Abstract No. 544 Radioembolization for metastatic colon cancer: survival differences between right- and left-sided primary sites. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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122
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Siddiqui Z, Singh K. Calvarial thickening due to anticonvulsants other than phenytoin. J R Coll Physicians Edinb 2018; 48:336-337. [PMID: 29537409 DOI: 10.4997/jrcpe.2017.412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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123
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Sharma M, Gupta P, Pandey S, Singh K, Sahu A, Kumar D. Parietal Bone Osteomyelitis with Brain Abscess in Traumatic Nonpenetrating Head Injury: An Uncommon Presentation. INDIAN JOURNAL OF NEUROSURGERY 2018. [DOI: 10.1055/s-0038-1639384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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124
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Saraswat A, Singh K, Jayasinghe R. Patent Foramen Ovale Closure Compared to Medical Therapy for Prevention of Stroke Recurrence in Cryptogenic Stroke Population: Systematic Review and Meta-Analysis. Heart Lung Circ 2018. [DOI: 10.1016/j.hlc.2018.06.958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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125
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Singh K, Gupta MK, Seam RK, Gupta M. A prospective randomized trial comparing capecitabine-based chemoradiotherapy with 5-FU-based chemoradiotherapy in neoadjuvant setting in locally advanced carcinoma rectum. Indian J Cancer 2017; 54:347-351. [PMID: 29199720 DOI: 10.4103/ijc.ijc_174_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Fluorouracil (FU)based chemoradiotherapy is regarded as a standard perioperative treatment in locally advanced rectal cancer. Capecitabine is an oral fluoropyrimidine that generates 5FU preferentially at the tumor site by exploiting the higher activity of the enzyme thymidine phosphorylase in tumor tissue compared with healthy tissue. As an oral agent, capecitabine can be administered in the outpatient setting, potentially providing FU exposure similar to a lowdose continuous infusion of 5FU. AIMS AND OBJECTIVES To compare capecitabine with 5FU, with regard to efficacy and toxicity when used in neoadjuvant setting along with radiotherapy for locally advanced carcinoma rectum. MATERIALS AND METHODS Thirty patients were enrolled, 14 in 5FU and 16 in capecitabine arm. All patients were planned for 45 Gy/25#/5 weeks pelvic radiotherapy followed by a boost of 5.4 Gy/3#/3 days. 5FU was prescribed at a dose of 500 mg/m2 #1-#5 and #21-#25 of RT and capecitabine was given at 1650 mg/m2 on RT days throughout the course of radiotherapy. A magnetic resonance imaging/computerized tomography scan was done at the start of treatment and 1 month after completion of treatment, followed by surgery. Toxicity was assessed weekly during treatment and on the first followup. RESULTS Response rates and toxicity profile of capecitabinebased cathode ray tube (CRT) was similar to 5FUbased CRT with nonsignificant P values. CONCLUSION Capecitabine may be used as an alternative in patients who do not tolerate 5FU.
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Singh K, Reddy R, Sharma G, Verma Y, Gardecki JA, Tearney G. In-line optical fiber metallic mirror reflector for monolithic common path optical coherence tomography probes. Lasers Surg Med 2017; 50:230-235. [DOI: 10.1002/lsm.22756] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/14/2017] [Indexed: 11/11/2022]
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Singh K, Seebaransingh R. Novel stabilization technique for insertion of Bonfils intubating endoscope: the "pool cue" grip. Br J Anaesth 2017; 119:1069-1070. [PMID: 29077821 DOI: 10.1093/bja/aex348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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128
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Munir S, Singh K, BASU A, Scharffetter-Kochanek K. 303 The adaptive response of mesenchymal stem cells to danger signals regulate neutrophil activation in cutaneous wounds. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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129
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Mantella L, Singh K, Sandhu P, Al-Omran M, Jankov R, Verma S. LINCRNA-P21 IS REGULATED BY CYCLIC MECHANICAL STRETCH AND UPREGULATED IN AORTIC ANEURYSMS. Can J Cardiol 2017. [DOI: 10.1016/j.cjca.2017.07.409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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130
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Kaushik A, Basu S, Singh K, Batra VS, Balakrishnan M. Activated carbon from sugarcane bagasse ash for melanoidins recovery. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 200:29-34. [PMID: 28550737 DOI: 10.1016/j.jenvman.2017.05.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 04/26/2017] [Accepted: 05/19/2017] [Indexed: 06/07/2023]
Abstract
This work investigates the value added utilization of two sugar-distillery wastes: (i) melanoidins, which are complex Maillard reaction products in molasses distillery wastewater, and (ii) unburnt carbon in sugarcane bagasse ash. Activated unburnt carbon (AUC), prepared by deashing and steam activation, had properties comparable to commercial activated carbon (CAC). Both carbons are suitable for melanoidins adsorption followed by desorption using 25% pyridine solution. For AUC, the equilibrium adsorption data is well described by Langmuir isotherm up to 35 °C while Freundlich model fits better at higher temperature. Adsorption using CAC followed Freundlich isotherm at all temperatures. Both carbons followed pseudo second order kinetics and displayed endothermic physisorption. Recovery of melanoidins from AUC (78%) was close to that observed with CAC (80%).
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Singh K, Phyn C, Reinsch M, Dobson J, Oden K, Davis S, Stelwagen K, Henderson H, Molenaar A. Temporal and spatial heterogeneity in milk and immune-related gene expression during mammary gland involution in dairy cows. J Dairy Sci 2017; 100:7669-7685. [DOI: 10.3168/jds.2017-12572] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 05/05/2017] [Indexed: 11/19/2022]
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Chhikara S, Sazawal S, Seth T, Chaubey R, Singh K, Sharma R, Mishra P, Mahapatra M, Saxena R. Molecular Response to Imatinib and Its Correlation with mRNA Expression Levels of Imatinib Influx Transporter (OCT1) in Indian Chronic Myeloid Leukemia Patients. Asian Pac J Cancer Prev 2017; 18:2043-2048. [PMID: 28843219 PMCID: PMC5697457 DOI: 10.22034/apjcp.2017.18.8.2043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Background and objectives: Imatinib mesylate is approved for the treatment of Chronic Myeloid Leukemia (CML). About 20% of patients with CML do not respond to treatment with Imatinib either initially or because of acquired resistance. In addition to mutated BCR-ABL1 kinase, the organic cation transporter1 (OCT1, encoded by SLC22A1) has been considered to contribute to Imatinib resistance in patients with chronic myeloid leukemia (CML). OCT1 has been reported to be the main influx transporter involved in Imatinib uptake into CML cells. To date, only a few studies have been reported on involvement of influx transporters in development of Imatinib resistance. Therefore this study was aimed to determine the expression level of Imatinib uptake transporter (OCT1) in CML patients and to correlate this level with molecular response. Methods: One hundred fifty eight patients on Imatinib were considered for gene expression analysis study for OCT1 gene. Total RNA was extracted from peripheral blood mononuclear cells. Complementary DNAs (cDNAs) were synthesized and Real Time Polymerase Chain Reaction (RQ-PCR) was performed. Results: High OCT1 expression was present in 81 (51.8%) patients and low OCT1 expression was in 77 (48.7%) patients. Low Sokal risk score group have a significantly high OCT1 expression (p=0.048). The rate of molecular response was higher in those with high OCT1 expression than in those with low OCT1 expression (p=0.05). Both event-free survival and median overall survival were significantly shorter in patients with low OCT1 expressions when compared to the patients with high OCT1 expression (p=0.03 and p=0.05). Conclusions: Our findings demonstrated that the mRNA expression level of OCT1 was significantly correlated with molecular response in CML patients. Based on these findings, present study believes that the pre-therapeutic higher expression of OCT1 may help to predict response to imatinib therapy in CML patients.
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Singh K. Role of silver nitrate in the efficacy of hydrogen peroxide aerial decontamination systems. J Hosp Infect 2017; 97:313-314. [PMID: 28577922 DOI: 10.1016/j.jhin.2017.05.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 05/24/2017] [Indexed: 10/19/2022]
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Bhandal GS, Singh K. Study of Photon Attenuation Coefficients of Some Multielement Materials. NUCL SCI ENG 2017. [DOI: 10.13182/nse94-a19815] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Singh K, Gagandeep, Sahota HS, Lark BS. Interaction of 662-keV Photons with Some Solutions of Urea. NUCL SCI ENG 2017. [DOI: 10.13182/nse99-a2048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Shakir S, Souhami L, Petrecca K, Mansure J, Panet-Raymond V, Shenouda G, Singh K, Alodaini A, Abdulkarim B, Guiot M. PV-0502: Post-operative radiation therapy in atypical meningiomas: analysis of prognostic factors. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)30942-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Mullegama SV, Klein S, Mulatinho MV, Senaratne T, Singh K, Nguyen D, Gallant N, Strom S, Ghahremani S, Rao PN, Martinez-Agosto JA. De novo loss-of-function variants in STAG2 are associated with developmental delay, microcephaly, and congenital anomalies. Am J Med Genet A 2017; 173:1319-1327. [PMID: 28296084 PMCID: PMC7033032 DOI: 10.1002/ajmg.a.38207] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 02/09/2017] [Accepted: 02/13/2017] [Indexed: 12/26/2022]
Abstract
The cohesin complex is an evolutionarily conserved multi-subunit protein complex which regulates sister chromatid cohesion during mitosis and meiosis. Additionally, the cohesin complex regulates DNA replication, DNA repair, and transcription. The core of the complex consists of four subunits: SMC1A, SMC3, RAD21, and STAG1/2. Loss-of-function mutations in many of these proteins have been implicated in human developmental disorders collectively termed "cohesinopathies." Through clinical exome sequencing (CES) of an 8-year-old girl with a clinical history of global developmental delay, microcephaly, microtia with hearing loss, language delay, ADHD, and dysmorphic features, we describe a heterozygous de novo variant (c.205C>T; p.(Arg69*)) in the integral cohesin structural protein, STAG2. This variant is associated with decreased STAG2 protein expression. The analyses of metaphase spreads did not exhibit premature sister chromatid separation; however, delayed sister chromatid cohesion was observed. To further support the pathogenicity of STAG2 variants, we identified two additional female cases from the DECIPHER research database with mutations in STAG2 and phenotypes similar to our patient. Interestingly, the clinical features of these three cases are remarkably similar to those observed in other well-established cohesinopathies. Herein, we suggest that STAG2 is a dosage-sensitive gene and that heterozygous loss-of-function variants lead to a cohesinopathy.
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Hardbower DM, Coburn LA, Asim M, Singh K, Sierra JC, Barry DP, Gobert AP, Piazuelo MB, Washington MK, Wilson KT. EGFR-mediated macrophage activation promotes colitis-associated tumorigenesis. Oncogene 2017; 36:3807-3819. [PMID: 28263971 PMCID: PMC5501754 DOI: 10.1038/onc.2017.23] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 01/12/2017] [Accepted: 01/25/2017] [Indexed: 02/08/2023]
Abstract
Epidermal growth factor receptor (EGFR) signaling is a known mediator of colorectal carcinogenesis. Studies have focused on the role of EGFR signaling in epithelial cells, although the exact nature of the role of EGFR in colorectal carcinogenesis remains a topic of debate. Here, we present evidence that EGFR signaling in myeloid cells, specifically macrophages, is critical for colon tumorigenesis in the AOM-DSS model of colitis-associated carcinogenesis (CAC). In a human tissue microarray, colonic macrophages demonstrated robust EGFR activation in the pre-cancerous stages of colitis and dysplasia. Utilizing the AOM-DSS model, mice with a myeloid-specific deletion of Egfr had significantly decreased tumor multiplicity and burden, protection from high-grade dysplasia, and significantly reduced colitis. Intriguingly, mice with gastrointestinal epithelial cell-specific Egfr deletion demonstrated no differences in tumorigenesis in the AOM-DSS model. The alterations in tumorigenesis in myeloid-specific Egfr knockout mice were accompanied by decreased macrophage, neutrophil, and T cell infiltration. Pro-tumorigenic M2 macrophage activation was diminished in myeloid-specific Egfr-deficient mice, as marked by decreased Arg1 and Il10 mRNA expression and decreased IL-4, IL-10 and IL-13 protein levels. Surprisingly, diminished M1 macrophage activation was also detectable, as marked by significantly reduced Nos2 and Il1b mRNA levels and decreased IFN-γ, TNF-α, and IL-1β protein levels. The alterations in M1 and M2 macrophage activation were confirmed in bone marrow-derived macrophages from mice with the myeloid-specific Egfr knockout. The combined effect of restrained M1 and M2 macrophage activation resulted in decreased production of pro-angiogenic factors, CXCL1 and VEGF, and reduced CD31+ blood vessels, which likely contributed to protection from tumorigenesis. These data reveal that EGFR signaling in macrophages, but not in colonic epithelial cells, has a significant role in CAC. EGFR signaling in macrophages may prove to be an effective biomarker of CAC or target for chemoprevention in patients with inflammatory bowel disease.
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139
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Singh K, Sharma A, Chatterjee T. Pigmented basal cell carcinoma: A rare case report. Indian J Cancer 2017; 53:380-381. [PMID: 28244464 DOI: 10.4103/0019-509x.200673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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140
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Singh B, Singh M, Kaur M, Singh K, Singh A, Kaur A. Role of trichloroacetic acid and gelfoam in closure of tympanic membrane perforations. Niger J Clin Pract 2017; 20:1233-1236. [DOI: 10.4103/njcp.njcp_295_16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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141
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Chavda S, Danino D, Aswal V, Singh K, Marangoni D, Bahadur P. Microstructure and transitions in mixed micelles of cetyltrimethylammonium tosylate and bile salts. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.10.047] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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142
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Arya SK, Danewalia SS, Arora M, Singh K. Effect of Variable Oxidation States of Vanadium on the Structural, Optical, and Dielectric Properties of B 2O 3-Li 2O-ZnO-V 2O 5 Glasses. J Phys Chem B 2016; 120:12168-12176. [PMID: 27802041 DOI: 10.1021/acs.jpcb.6b08285] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the present study, the effect of variable vanadium oxidation states on the structural, optical, and dielectric properties of vanadium oxide containing lithium borate glasses has been investigated. Electron paramagnetic resonance studies indicate that vanadium in these glasses is mostly in the V4+ state, having a tetragonal symmetry. As the glass composition of V2O5 increases, tetragonality also increases at the cost of octahedral symmetry. The photoluminescence (PL) spectra of these glasses are dominated by zinc oxide transition, whereas the peaks pertaining to the vanadyl group are not visible in the PL spectra. The optical absorption spectra show a single wide absorption band, which is attributed to V4+ ions in these glasses. The ac conductivity of the glasses increases with an increase in vanadium content. The highest electrical conductivity observed is ∼10-5 S cm-1 at 250 °C for the glass with 2.5 mol % V2O5. Electrical conductivity is dominated by electron conduction, as indicated by the activation energy calculation.
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143
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Choudhary RK, Mishra P, Samanta A, Haider J, Mallik GK, Singh K, Kain V. Electrochemical deposition of uranium dioxide coatings on alloy 600: effect of annealing on Ni and Cu interlayer mixing. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-5084-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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144
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Kumar R, Kumar M, Singh K. P291 Skin sensitivity to various food allergens in bronchial asthma and/or allergic rhinitis patients in India. Ann Allergy Asthma Immunol 2016. [DOI: 10.1016/j.anai.2016.09.304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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145
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Deli A, McGranahan M, Addison A, Perry L, Farag S, Singh K. Management of acute cholecystitis: A comparison of outcomes following emergency cholecystectomy versus medical management. Int J Surg 2016. [DOI: 10.1016/j.ijsu.2016.08.444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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146
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Winter MC, Tidy JA, Hills A, Ireson J, Gillett S, Singh K, Hancock BW, Coleman RE. Risk adapted single-agent dactinomycin or carboplatin for second-line treatment of methotrexate resistant low-risk gestational trophoblastic neoplasia. Gynecol Oncol 2016; 143:565-570. [PMID: 27756557 DOI: 10.1016/j.ygyno.2016.10.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 09/21/2016] [Accepted: 10/01/2016] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To evaluate the outcome of patients treated with second-line chemotherapy for methotrexate-resistant low-risk GTN at the Sheffield Centre, UK between 2001 and 2015, including the novel use of single-agent carboplatin as a strategy to reduce exposure to combination chemotherapy. METHODS 392 low-risk GTN patients were treated with first-line methotrexate. The selection of chemotherapy regimen following methotrexate-resistance depended on the volume of residual disease as indicated by the serum hCG value at the time, with patients switching to either single-agent dactinomycin at an hCG level<150IU/L from 2001-2010 and <300IU/L since 2010, or to combination treatment with etoposide/dactinomycin (EA) above these thresholds. In order to reduce exposure to more toxic combination chemotherapy regimens, our treatment policy was revised in 2011, with the recommendation of single-agent carboplatin as an alternative to EA at hCG levels >300IU/L. RESULTS 136 (35%) of 392 received second-line chemotherapy following methotrexate-resistance. 59 patients received single-agent dactinomycin with 53 (90%) patients achieving complete hCG response, 3 patients requiring combination chemotherapy or surgery, and 3 patients subsequently spontaneously resolving. 56 patients received EA chemotherapy with hCG complete response in 50 (89%) patients, and the remaining 6 patients were cured with further multi-agent chemotherapy or surgery. With carboplatin, 17/21 (81%) achieved an overall complete hCG response rate, with 4 patients requiring third-line EA. Carboplatin was well tolerated with no significant alopecia; myelosuppression was the most significant toxicity. Overall survival for all patients was 100%. CONCLUSION These data show the continued excellent outcomes for methotrexate-resistant low-risk patients treated with single-agent dactinomycin or EA. Our experience with carboplatin is promising and provides an alternative regimen for methotrexate-resistant low-risk disease that avoids alopecia and in-patient treatment.
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Russo J, James T, Ruel M, Dupuis J, Singh K, Goubran D, Malhotra N, Chan V, Chong A, Hibbert B, Tanguay J, Lordkipanidzé M, Perrault L, Wells G, Bourke M, Rubens F, So D. ISCHEMIC AND BLEEDING OUTCOMES AFTER CORONARY ARTERY BYPASS GRAFTING AMONG PATIENTS INITIALLY TREATED WITH A P2Y12 RECEPTOR ANTAGONIST FOR ACUTE CORONARY SYNDROMES - INSIGHTS ON THE USE OF TICAGRELOR VERSUS CLOPIDOGREL PRIOR TO SURGERY. Can J Cardiol 2016. [DOI: 10.1016/j.cjca.2016.07.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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148
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Russo J, James T, Ruel M, Dupuis J, Singh K, Goubran D, Malhotra N, Chan V, Chong A, Hibbert B, Tanguay J, Lordkipanidzé M, Perrault L, Wells G, Bourke M, Rubens F, So D. ISCHEMIC AND BLEEDING OUTCOMES AFTER CORONARY ARTERY BYPASS GRAFTING AMONG PATIENTS INITIALLY TREATED WITH A P2Y12 RECEPTOR ANTAGONIST FOR ACUTE CORONARY SYNDROMES - INSIGHTS ON TIMING OF DISCONTINUATION OF TICAGRELOR AND CLOPIDOGREL PRIOR TO SURGERY. Can J Cardiol 2016. [DOI: 10.1016/j.cjca.2016.07.407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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149
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Singh K, Thukral CL, Gupta K, Singh N, Aggrawal SL, Ded KS. Role of Magnetic Resonance Imaging in the Evaluation of Spinal Dysraphism. HONG KONG JOURNAL OF RADIOLOGY 2016. [DOI: 10.12809/hkjr1615365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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150
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Soni K, Patel N, Singh K, Jha A, Patel H, Gupta R, Srinivas NR. A Sensitive Triple Quadrupole Liquid Chromatography Mass Spectrometric Method for the Estimation of Valproic Acid in K2EDTA Human Plasma using Furosemide as the Internal Standard. Drug Res (Stuttg) 2016; 66:666-672. [PMID: 27652903 DOI: 10.1055/s-0042-114777] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A valproic acid is primarily being used in the treatment of epilepsy is a histone deacetylase inhibitor and it is under investigation for treatment of HIV and various cancer indications. A specific, sensitive and fast bioanalytical LC-MS/MS method was developed with furosemide as an internal standard (IS) and thoroughly validated for the quantitation of valproic acid using turbo ion spray in negative ion mode. The analyte and IS was extracted using protein precipitation. The chromatographic separation of analytes from extracted matrix was achieved using a Chromolith RP 18e (2.0×50 mm) column with a gradient mobile phase comprising of acetonitrile and purified water with acetic acid. The elution of both peaks was achieved within 5.2 min, with retention times of 2.55 min and 1.67 min for valproic acid and IS, respectively. Quantitation of valproic acid was achieved by the pseudo SRM transition pairs (m/z 142.8→m/z 142.8), and SRM transition pair (m/z 328.8 →m/z 204.6) for internal standard.The calibration standards of valproic acid showed linear over a range from 50 to 40 000 ng/mL, with a lower limit of quantitation of 50 ng/mL with accuracy of 3.74% and precision of 5.06%. The bias for inter- and intra-batch assays was 1.24-6.14% and 3.85-11.84%, respectively; while the corresponding precision was 2.56-16.37% and 1.29-11.34%, respectively. The developed method was used to monitor valproic acid levels in clinical samples. Because of higher sensitivity, this method can be used for therapeutic drug monitoring in pediatric subjects.
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