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https://www.readbyqxmd.com/read/28540777/acute-kidney-injury-in-ovarian-cancer-patients-undergoing-cytoreductive-surgery-and-hyperthermic-intra-peritoneal-chemotherapy
#1
Eliza I-Lin Sin, Claramae Shulyn Chia, Grace Hwei Ching Tan, Khee Chee Soo, Melissa Ching-Ching Teo
BACKGROUND: Cytoreductive surgery and hyperthermic intra-peritoneal chemotherapy (CRS-HIPEC) prolongs survival in patients with metastatic peritoneal disease. We look at the incidence of acute kidney injury (AKI) in patients who have received cisplatin during CRS-HIPEC in the treatment of peritoneal carcinomatosis from an ovarian primary, and identify possible peri-operative risk factors. METHODS: Between 2005 and 2013, we performed CRS-HIPEC on 47 patients with ovarian primaries and peritoneal metastasis...
March 5, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28526682/aeroallergens-induce-reactive-oxygen-species-production-and-dna-damage-and-dampen-antioxidant-responses-in-bronchial-epithelial-cells
#2
Tze Khee Chan, W S Daniel Tan, Hong Yong Peh, W S Fred Wong
Exposure to environmental allergens is a major risk factor for asthma development. Allergens possess proteolytic activity that is capable of disrupting the airway epithelium. Although there is increasing evidence pointing to asthma as an epithelial disease, the underlying mechanism that drives asthma has not been fully elucidated. In this study, we investigated the direct DNA damage potential of aeroallergens on human bronchial epithelial cells and elucidated the mechanisms mediating the damage. Human bronchial epithelial cells, BEAS-2B, directly exposed to house dust mites (HDM) resulted in enhanced DNA damage, as measured by the CometChip and the staining of DNA double-strand break marker, γH2AX...
May 19, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28457184/changes-in-hepatic-tr%C3%AE-protein-expression-lipogenic-gene-expression-and-long-chain-acylcarnitine-levels-during-chronic-hyperthyroidism-and-t3-withdrawal-in-a-mouse-model
#3
Kenji Ohba, Rohit Anthony Sinha, Melvin Khee-Shing Leow, Liliana Felicia Iannucci, Brijesh Kumar Singh, Jin Zhou, Jean-Paul Kovalik, Xiao-Hui Liao, Samuel Refetoff, Judy Chia Ghee Sng, Paul M Yen
BACKGROUND: Thyroid hormone (TH) has important roles in regulating hepatic metabolism. We previously reported that most hepatic genes activated by a single T3 injection became desensitized after multiple injections, and that approximately 10% of target genes did not return to basal expression levels after T3 withdrawal despite normalization of serum TH and TSH levels. To determine the possible mechanism(s) for desensitization and incomplete recovery of hepatic target gene transcription and their effects on metabolism, we measured mRNA and/or protein expression levels of key regulators of TH action as well as metabolomic changes after chronic T3 treatment and withdrawal...
April 29, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28453819/evaluation-of-a-care-transition-program-with-pharmacist-provided-home-based-medication-review-for-elderly-singaporeans-at-high-risk-of-readmissions
#4
McVin Hua Heng Cheen, Chong Ping Goon, Wan Chee Ong, Paik Shia Lim, Choon Nam Wan, Mei Yan Leong, Giat Yeng Khee
Objective: This study aimed to determine whether pharmacist-provided home-based medication review (HBMR) can reduce readmissions in the elderly. Design: Retrospective cohort study. Setting: Patient's home. Participants: Records of patients referred to a care transition program from March 2011 through March 2015 were reviewed. Patients aged 60 years and older taking more than 5 medications and had at least 2 unplanned admissions within 3 months preceding the first home visit were included...
April 1, 2017: International Journal for Quality in Health Care
https://www.readbyqxmd.com/read/28450639/measurement-of-the-small-scale-structure-of-the-intergalactic-medium-using-close-quasar-pairs
#5
Alberto Rorai, Joseph F Hennawi, Jose Oñorbe, Martin White, J Xavier Prochaska, Girish Kulkarni, Michael Walther, Zarija Lukić, Khee-Gan Lee
The distribution of diffuse gas in the intergalactic medium (IGM) imprints a series of hydrogen absorption lines on the spectra of distant background quasars known as the Lyman-α forest. Cosmological hydrodynamical simulations predict that IGM density fluctuations are suppressed below a characteristic scale where thermal pressure balances gravity. We measured this pressure-smoothing scale by quantifying absorption correlations in a sample of close quasar pairs. We compared our measurements to hydrodynamical simulations, where pressure smoothing is determined by the integrated thermal history of the IGM...
April 28, 2017: Science
https://www.readbyqxmd.com/read/28434594/invited-commentary
#6
Kak Khee Yeung
No abstract text is available yet for this article.
May 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28423634/early-assessment-of-tumor-response-to-photodynamic-therapy-using-combined-diffuse-optical-and-diffuse-correlation-spectroscopy-to-predict-treatment-outcome
#7
Patricia Thong, Kijoon Lee, Hui-Jin Toh, Jing Dong, Chuan-Sia Tee, Kar-Perng Low, Pui-Haan Chang, Ramaswamy Bhuvaneswari, Ngian-Chye Tan, Khee-Chee Soo
Photodynamic therapy (PDT) of cancer involves the use of a photosensitizer that can be light-activated to eradicate tumors via direct cytotoxicity, damage to tumor vasculature and stimulating the body's immune system. Treatment outcome may vary between individuals even under the same regime; therefore a non-invasive tumor response monitoring system will be useful for personalization of the treatment protocol. We present the combined use of diffuse optical spectroscopy (DOS) and diffuse correlation spectroscopy (DCS) to provide early assessment of tumor response...
March 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28398218/magnetic-field-influences-on-the-lateral-dose-response-functions-of-photon-beam-detectors-mc-study-of-wall-less-water-filled-detectors-with-various-densities
#8
Hui Khee Looe, Bjoern Delfs, Daniela Poppinga, Dietrich Harder, Bjoern Poppe
The distortion of detector reading profiles across photon beams in the presence of magnetic fields is a developing subject of clinical photon-beam dosimetry. The underlying modification by the Lorentz force of a detector's lateral dose response function - the convolution kernel transforming the true cross-beam dose profile in water into the detector reading profile - is here studied for the first time. The three basic convolution kernels, the photon fluence response function, the dose deposition kernel, and the lateral dose response function, of wall-less cylindrical detectors filled with water of low, normal and enhanced density are shown by Monte Carlo simulation to be distorted in the prevailing direction of the Lorentz force...
April 11, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28382395/distant-metastasis-as-the-sole-initial-manifestation-of-well-differentiated-thyroid-carcinoma
#9
Anna See, N Gopalakrishna Iyer, Ngian Chye Tan, Constance Teo, Jeremy Ng, Khee Chee Soo, Hiang Khoon Tan
Thyroid carcinoma usually presents as a neck lump. Distant metastasis as the sole initial manifestation of well-differentiated thyroid carcinoma (WDTC) is rare and little is known about these patients. The aim of this study is to characterize patients who present with distant metastasis as the sole initial manifestation of WDTC. Retrospective review of case records of WDTC seen at the National Cancer Centre Singapore from 2002 to 2015 was performed. Patients with no prior complaint of neck swelling and whose first presentation was distant metastatic WDTC were included...
April 5, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28371454/tumor-biology-remains-the-main-determinant-of-prognosis-in-retroperitoneal-sarcomas-a-14-year-single-center-experience
#10
Deanna Wan Jie Ng, Grace Hwei Ching Tan, Claramae Shulyn Chia, Soo Khee Chee, Richard Quek, Mohamad Farid, Melissa Ching Ching Teo
AIM: To review our experience in the management of retroperitoneal sarcomas (RPSs) in a single institution, with a predominantly Asian population, and identify associated prognostic factors for overall survival (OS), disease-free survival (DFS) and local recurrence. MATERIALS AND METHODS: All RPSs diagnosed and managed at our center between January 2000 and March 2014 were included. Exclusion criteria included patients whose medical records were untraceable and patients who underwent biopsy but did not undergo resection...
March 30, 2017: Asia-Pacific Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28344747/gastric-peritoneal-carcinomatosis-a-retrospective-review
#11
Hwee Leong Tan, Claramae Shulyn Chia, Grace Hwei Ching Tan, Su Pin Choo, David Wai-Meng Tai, Clarinda Wei Ling Chua, Matthew Chau Hsien Ng, Khee Chee Soo, Melissa Ching Ching Teo
AIM: To characterize patients with gastric peritoneal carcinomatosis (PC) and their typical clinical and treatment course with palliative systemic chemotherapy as the current standard of care. METHODS: We performed a retrospective electronic chart review of all patients with gastric adenocarcinoma with PC diagnosed at initial metastatic presentation between January 2010 and December 2014 in a single tertiary referral centre. RESULTS: We studied a total of 271 patients with a median age of 63...
March 15, 2017: World Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28342596/the-practical-application-of-scintillation-dosimetry-in-small-field-photon-beam-radiotherapy
#12
Elisa Burke, Daniela Poppinga, Andreas A Schönfeld, Dietrich Harder, Björn Poppe, Hui Khee Looe
Plastic scintillation detectors are a new instrument of stereotactic photon-beam dosimetry. The clinical application of the plastic scintillation detector Exradin W1 at the Siemens Artiste and Elekta Synergy accelerators is a matter of current interest. In order to reduce the measurement uncertainty, precautions have to be taken with regard to the geometrical arrangement of the scintillator, the light-guide fiber and the photodiode in the radiation field. To determine the "Cerenkov light ratio" CLR with a type A uncertainty below 1%, the Cerenkov calibration procedure for small-field measurements based on the two-channel spectral method was used...
March 22, 2017: Zeitschrift Für Medizinische Physik
https://www.readbyqxmd.com/read/28330940/impact-of-subsidies-on-cancer-genetic-testing-uptake-in-singapore
#13
Shao-Tzu Li, Jeanette Yuen, Ke Zhou, Nur Diana Binte Ishak, Yanni Chen, Marie Met-Domestici, Sock Hoai Chan, Yee Pin Tan, John Carson Allen, Soon Thye Lim, Khee Chee Soo, Joanne Ngeow
PURPOSE: Previous reports cite high costs of clinical cancer genetic testing as main barriers to patient's willingness to test. We report findings of a pilot study that evaluates how different subsidy schemes impact genetic testing uptake and total cost of cancer management. METHODS: We included all patients who attended the Cancer Genetics Service at the National Cancer Centre Singapore (January 2014-May 2016). Two subsidy schemes, the blanket scheme (100% subsidy to all eligible patients), and the varied scheme (patients received 50%-100% subsidy dependent on financial status) were compared...
April 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28320776/epigenomic-promoter-alterations-amplify-gene-isoform-and-immunogenic-diversity-in-gastric-adenocarcinoma
#14
Aditi Qamra, Manjie Xing, Nisha Padmanabhan, Jeffrey Jun Ting Kwok, Shenli Zhang, Xu Chang, Yan Shan Leong, Ai Ping Lee Lim, Qianqao Tang, WenFong Ooi, Joyce Suling Lin, Tannistha Nandi, Xiaosai Yao, Xuewen Ong, Minghui Lee, Su Ting Tay, Angie Tan Lay Keng, Erna Gondo Santoso, Cedric Chuan Young Ng, Alvin Ng, Apinya Jusakul, Duane Smoot, Hassan Ashktorab, Sun Young Rha, Khay Guan Yeoh, Wei Peng Yong, Pierce K H Chow, Weng Hoong Chan, Hock Soo Ong, Khee Chee Soo, Kyoung-Mee Kim, Wai Keong Wong, Steven G Rozen, Bin Tean Teh, Dennis Kappei, Jeeyun Lee, John Connolly, Patrick Tan
Promoter elements play important roles in isoform and cell-type specific expression. We surveyed the epigenomic promoter landscape of gastric adenocarcinoma (GC), analyzing 110 chromatin profiles (H3K4me3, H3K4me1, H3K27ac) of primary GCs, GC lines, and non-malignant gastric tissues. We identified ~2000 promoter alterations (somatic promoters), many deregulated in various epithelial malignancies and mapping frequently to alternative promoters within the same gene, generating potential pro-oncogenic isoforms (RASA3)...
March 20, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28291795/experimental-chronic-kidney-disease-attenuates-ischemia-reperfusion-injury-in-an-ex-vivo-rat-lung-model
#15
Chung-Kan Peng, Kun-Lun Huang, Chou-Chin Lan, Yu-Juei Hsu, Geng-Chin Wu, Chia-Hui Peng, Chin-Pyng Wu, Khee-Siang Chan
Lung ischemia reperfusion injury (LIRI) is one of important complications following lung transplant and cardiopulmonary bypass. Although patients on hemodialysis are still excluded as lung transplant donors because of the possible effects of renal failure on the lungs, increased organ demand has led us to evaluate the influence of chronic kidney disease (CKD) on LIRI. A CKD model was induced by feeding Sprague-Dawley rats an adenine-rich (0.75%) diet for 2, 4 and 6 weeks, and an isolated rat lung in situ model was used to evaluate ischemia reperfusion (IR)-induced acute lung injury...
2017: PloS One
https://www.readbyqxmd.com/read/28222259/band-alignment-at-gan-single-layer-wse2-interface
#16
Malleswararao Tangi, Pawan Mishra, Chien-Chih Tseng, Tien Khee Ng, Mohamed Nejib Hedhili, Dalaver H Anjum, Mohd Sharizal Alias, Nini Wei, Lain-Jong Li, Boon S Ooi
We study the band discontinuity at the GaN/single-layer (SL) WSe2 heterointerface. The GaN thin layer is epitaxially grown by molecular beam epitaxy on chemically vapor deposited SL-WSe2/c-sapphire. We confirm that the WSe2 was formed as an SL from structural and optical analyses using atomic force microscopy, scanning transmission electron microscopy, micro-Raman, absorbance, and microphotoluminescence spectra. The determination of band offset parameters at the GaN/SL-WSe2 heterojunction is obtained by high-resolution X-ray photoelectron spectroscopy, electron affinities, and the electronic bandgap values of SL-WSe2 and GaN...
March 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28177248/surface-passivation-of-gan-nanowires-for-enhanced-photoelectrochemical-water-splitting
#17
Purushothaman Varadhan, Hui-Chun Fu, Davide Priante, Jose Ramon Duran Retamal, Chao Zhao, Mohamed Ebaid, Tien Khee Ng, Idirs Ajia, Somak Mitra, Iman S Roqan, Boon S Ooi, Jr-Hau He
Hydrogen production via photoelectrochemical water-splitting is a key source of clean and sustainable energy. The use of one-dimensional nanostructures as photoelectrodes is desirable for photoelectrochemical water-splitting applications due to the ultralarge surface areas, lateral carrier extraction schemes, and superior light-harvesting capabilities. However, the unavoidable surface states of nanostructured materials create additional charge carrier trapping centers and energy barriers at the semiconductor-electrolyte interface, which severely reduce the solar-to-hydrogen conversion efficiency...
March 8, 2017: Nano Letters
https://www.readbyqxmd.com/read/28158020/droop-free-al-sub-x-sub-ga-sub-1-x-sub-n-al-sub-y-sub-ga-sub-1-y-sub-n-quantum-disks-in-nanowires-ultraviolet-led-emitting-at-337-nm-on-metal-silicon-substrates
#18
Bilal Janjua, Haiding Sun, Chao Zhao, Dalaver H Anjum, Davide Priante, Abdullah A Alhamoud, Feng Wu, Xiaohang Li, Abdulrahman M Albadri, Ahmed Y Alyamani, Munir M El-Desouki, Tien Khee Ng, Boon S Ooi
Currently the AlGaN-based ultraviolet (UV) solid-state lighting research suffers from numerous challenges. In particular, low internal quantum efficiency, low extraction efficiency, inefficient doping, large polarization fields, and high dislocation density epitaxy constitute bottlenecks in realizing high power devices. Despite the clear advantage of quantum-confinement nanostructure, it has not been widely utilized in AlGaN-based nanowires. Here we utilize the self-assembled nanowires (NWs) with embedding quantum-disks (Qdisks) to mitigate these issues, and achieve UV emission of 337 nm at 32 A/cm<sup>2</sup> (80 mA in 0...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28138878/preoperative-platelet-lymphocyte-ratio-is-an-independent-prognostic-marker-and-superior-to-carcinoembryonic-antigen-in-colorectal-peritoneal-carcinomatosis-patients-undergoing-cytoreductive-surgery-and-hyperthermic-intraperitoneal-chemotherapy
#19
Tiffany Sin Hui Bong, Grace Hwei Ching Tan, Claramae Chia, Khee Chee Soo, Melissa Ching Ching Teo
OBJECTIVE: The aim of this study was to examine the prognostic significance of preoperative inflammatory-based indices, platelet-lymphocyte ratio (PLR), neutrophil-lymphocyte ratio (NLR), and carcinoembryonic antigen (CEA) in predicting overall survival (OS) in patients with colorectal peritoneal carcinomatosis (CPC) treated with cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC). METHODS: Sixty patients with pathologically confirmed CPC treated with CRS and HIPEC between 2003 and 2015 were included...
January 30, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28094849/the-collimator-monitoring-fill-factor-of-a-two-dimensional-detector-array-a-measure-of-its-ability-to-detect-collimation-errors
#20
Tenzin Sonam Stelljes, Hui Khee Looe, Dietrich Harder, Björn Poppe
PURPOSE: Two-dimensional detector arrays are routinely used for constancy checks and treatment plan verification in photon-beam radiotherapy. In addition to the spatial resolution of the dose profiles, the "coverage" of the radiation field with respect to the detection of any beam collimation deficiency appears as the second characteristic feature of a detector array. The here proposed "collimator monitoring fill factor" (CM fill factor) has been conceived to serve as a quantitative characteristic of this "coverage"...
March 2017: Medical Physics
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