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https://www.readbyqxmd.com/read/29336463/protein-corona-in-drug-delivery-for-multimodal-cancer-therapy-in-vivo
#1
Eugenia Li Ling Yeo, Patricia Soo Ping Thong, Khee Chee Soo, James Chen Yong Kah
The protein corona is inevitably formed on nanoparticles (NPs) when they are introduced in vivo and has been associated with a reduction in targeting yield, immune recognition and rapid blood clearance, leading to poor tumor accumulation. We have recently shown that it is possible to exploit the protein corona for drug delivery by exploiting it for loading and triggering the release of a photosensitizer Chlorin e6 (Ce6) for simultaneous photodynamic (PDT) and photothermal therapy (PTT) in vitro. Here, we extended our previous in vitro studies to evaluate its effectiveness in vivo...
January 16, 2018: Nanoscale
https://www.readbyqxmd.com/read/29328895/what-is-the-hepatitis-b-vaccination-regimen-in-chronic-kidney-disease
#2
Kheng Yong Ong, Hong Yun Wong, Giat Yeng Khee
No abstract text is available yet for this article.
January 2018: Cleveland Clinic Journal of Medicine
https://www.readbyqxmd.com/read/29299509/salivary-fistula-blue-dye-testing-as-part-of-an-algorithm-for-early-diagnosis
#3
Kimberley L Kiong, Ngian Chye Tan, Thakshayeni Skanthakumar, Constance E H Teo, Khee Chee Soo, Hiang Khoon Tan, Elizabeth Roche, Kaisin Yee, N Gopalakrishna Iyer
Objective: Orocutaneous and pharyngocutaneous fistula (OPCF) is a debilitating complication of head and neck surgery for squamous cell carcinoma (SCC), resulting in delayed adjuvant treatment and prolonged hospitalization. As yet, there is no established test that can help in prompt and accurate diagnosis of OPCF. This study aims to determine the accuracy of bedside blue dye testing and its role as part of an algorithm for early diagnosis. We also analyze the risk factors predisposing to OPCF...
December 2017: Laryngoscope Investigative Otolaryngology
https://www.readbyqxmd.com/read/29236165/polyphenol-rich-curry-made-with-mixed-spices-and-vegetables-benefits-glucose-homeostasis-in-chinese-males-polyspice-study-a-dose-response-randomized-controlled-crossover-trial
#4
Sumanto Haldar, Siok Ching Chia, Sze Han Lee, Joseph Lim, Melvin Khee-Shing Leow, Eric Chun Yong Chan, Christiani Jeyakumar Henry
PURPOSE: To investigate acute effects of two doses of a polyphenol-rich curry made with seven different spices and four base vegetables, eaten with white rice, on 24 h glucose response, postprandial insulinemia, triglyceridemia and 24 h urinary total polyphenol excretion (TPE). METHODS: Randomized, controlled, dose-response crossover trial in healthy, Chinese men [n = 20, mean ± standard deviation (SD) age 23.7 ± 2.30 years, BMI 23.0 ± 2.31 kg/m2] who consumed test meals matched for calories, macronutrients and total vegetables content, consisting either Dose 0 Control (D0C) or Dose 1 Curry (D1C) or Dose 2 Curry (D2C) meal...
December 13, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/29198452/betaglycan-tgfbr3-up-regulation-correlates-with-increased-tgf-%C3%AE-signaling-in-marfan-patient-fibroblasts-in-vitro
#5
Menno Evert Groeneveld, Natalija Bogunovic, René John Philip Musters, Geert Jan Tangelder, Gerard Pals, Willem Wisselink, Dimitra Micha, Kak Khee Yeung
BACKGROUND: Marfan syndrome (MFS), a congenital connective tissue disorder leading to aortic aneurysm development, is caused by fibrillin-1 (FBN1) gene mutations. Transforming growth factor beta (TGF-β) might play a role in the pathogenesis. It is still a matter of discussion if and how TGF-β up-regulates the intracellular downstream pathway, although TGF-β receptor 3 (TGFBR3 or Betaglycan) is thought to be involved. We aimed to elucidate the role of TGFBR3 protein in TGF-β signaling in Marfan patients...
November 4, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/29175160/the-effect-of-chewing-simulation-on-surface-roughness-of-resin-composite-when-opposed-by-zirconia-ceramic-and-lithium-disilicate-ceramic
#6
Ting Khee Ho, Julian D Satterthwaite, Nikolaos Silikas
OBJECTIVE: To assess the change in surface roughness of nanohybrid resin composite (Tetric EvoCeram) after antagonist wear against monolithic zirconia and lithium disilicate ceramics through a simulated chewing test using a three-dimensional (3D) profilometer. METHODS: A total of 40 Tetric EvoCeram™ resin composite specimens against either a Lava™ Plus zirconia antagonist (n=20) or IPS e.max Press lithium disilicate antagonist (n=20) were prepared for the study...
November 23, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29155691/magnetic-fields-are-causing-small-but-significant-changes-of-the-radiochromic-ebt3-film-response-to-6-mv-photons
#7
Bjoern Delfs, Andreas Alexander Schoenfeld, Daniela Poppinga, Ralf-Peter Kapsch, Ping Jiang, Dietrich Harder, Bjoern Poppe, Hui Khee Looe
The optical density (OD) of EBT3 radiochromic exposed to absorbed doses to water up to D = 20 Gy in magnetic fields of B = 0.35 and 1.42 T was measured in three colour channels. A 7 cm wide water phantom with fixed film holder was placed in magnetic fields and was irradiated by a 6 MV photon beam whose axis was directed at right angles with the field lines. The doses at the film position at water depth 5 cm were measured with a calibrated ionization chamber when the magnet was switched off and were converted to the doses in presence of the magnetic field via the monitor units and by a Monte Carlo-calculated correction accounting for the slight change of the depth dose curves in magnetic fields...
November 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29148434/the-cutting-away-of-potential-secondary-electron-tracks-explains-the-effects-of-beam-size-and-detector-wall-density-in-small-field-photon-dosimetry
#8
Hui Khee Looe, Bjoern Delfs, Daniela Poppinga, Ping Jiang, Dietrich Harder, Bjoern Poppe
The well-known field-size dependent overresponse in small-field photon-beam dosimetry of solid-state detectors equipped with very thin sensitive volumes, such as the PTW microDiamond, cannot be caused by the photon and electron interactions within these sensitive layers because they are only a few micrometers thick. The alternative explanation is that their overresponse is caused by the combination of two effects, the modification of the secondary electron fluence profile i) by a field size too small to warrant lateral secondary electron equilibrium and ii) by the density-dependent electron ranges in the structural detector materials placed in front of or backing the sensitive layer...
November 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29108335/a-three-gene-immunohistochemical-panel-serves-as-an-adjunct-to-clinical-staging-of-patients-with-head-and-neck-cancer
#9
Chin-Ann J Ong, Nicholas B Shannon, Stefan Mueller, Sze Min Lek, Xuan Qiu, Fui Teen Chong, Ke Li, Kelvin K N Koh, Gerald C A Tay, Thakshayeni Skanthakumar, Jacqueline S G Hwang, Tony Kiat Hon Lim, Mei Kim Ang, Daniel S W Tan, Ngian-Chye Tan, Hiang Khoon Tan, Khee Chee Soo, N Gopalakrishna Iyer
Background: Current management of head and neck squamous cell carcinoma (HNSCC) depends on tumor staging. Despite refinements in clinical staging algorithms, outcomes remain unchanged for the last two decades. In this study, we set out to identify a small, clinically applicable molecular panel to aid prognostication of patients with HNSCC. Materials and Methods: Data from The Cancer Genome Atlas (TCGA) was used to derive copy number aberrations and expression changes to identify putative prognostic genes...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29107131/the-impact-of-stress-urinary-incontinence-on-individual-components-of-quality-of-life-in-malaysian-women
#10
Renly Lim, Men Long Liong, Wing Seng Leong, Yong Khee Lau, Nurzalina Abdul Karim Khan, Kah Hay Yuen
OBJECTIVE: To assess the impact of stress urinary incontinence (SUI) on individual components of quality of life (QoL) using both condition-specific and generic questionnaires, and to compare the results of the two instruments with a control group. METHODS: Women with or without SUI aged ≥21 years old were recruited. Subjects completed the International Consultation of Incontinence-Urinary Incontinence Short Form (ICIQ-UI-SF), International Consultation of Incontinence-Lower Urinary Tract Symptoms Quality of Life (ICIQ-LUTSqol) and EQ-5D questionnaires...
October 26, 2017: Urology
https://www.readbyqxmd.com/read/29102976/giant-phaeochromocytoma-presenting-with-an-acute-stroke-reappraising-phaeochromocytoma-surveillance-for-the-neurofibromatosis-type-1-phakomatosis
#11
Yingshan Lee, Leon Yuan Rui Tan, Yong Howe Ho, Melvin Khee Shing Leow
Neurofibromatosis type 1 (NF1) is a multisystem genetic disorder associated with reduced lifespan attributed largely to malignancy and vascular causes. One of the tumours associated with NF1 is phaeochromocytoma. The phaeochromocytoma has earned the moniker, a 'great mimicker', due to its varied means of presentation. We present a patient with NF1 who was diagnosed with a giant 20 cm phaeochromocytoma after suffering from an ischaemic stroke. Current guidelines do not advocate surveillance of phaeochromocytoma in asymptomatic patients with NF1, unlike other genetic syndromes associated with phaeochromocytoma...
November 3, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29089020/transcriptomic-study-of-salmonella-enterica-subspecies-enterica-serovar-typhi-biofilm
#12
Khee Chian Jason Chin, Todd Duane Taylor, Maxime Hebrard, Kogaan Anbalagan, Marjan Ganjali Dashti, Kia Kien Phua
BACKGROUND: Typhoid fever is an acute systemic infection of humans caused by Salmonella enterica subspecies enterica serovar Typhi (S. Typhi). In chronic carriers, the bacteria survive the harsh environment of the gallbladder by producing biofilm. The phenotype of S. Typhi biofilm cells is significantly different from the free-swimming planktonic cells, and studies have shown that they are associated with antibiotic resistance, immune system evasion, and bacterial persistence. However, the mechanism of this transition and the events leading to biofilm formation are unknown...
October 31, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29052960/treatment-and-outcomes-of-melanoma-in-asia-results-from-the-national-cancer-centre-singapore
#13
Yi Lin Teh, Wei Lin Goh, Sze Huey Tan, Grace Yong, Alisa Noor Hidayah Sairi, Khee Chee Soo, Johnny Ong, Claramae Chia, Grace Tan, Henry Soeharno, Mann Hong Tan, Michelle Chan, Selvarajan Sathiyamoorthy, Kesavan Sittampalam, Jonathan Teh, Francis Chin, Vijay Sethi, Melissa Teo, Richard Quek, Mohamad Farid
BACKGROUND: Acral melanoma (AM) and mucosal melanoma (MM) make up more than half of melanomas in Asia but comprise only 5% of cases in Caucasians, where cutaneous melanoma (CM) predominates. AM and MM are thought to be genetically and biologically distinct from CM. We report the characteristics and outcomes of melanoma patients from the National Cancer Centre Singapore. METHODS: Case records of 210 patients treated between 2002 and 2014 were reviewed. RESULTS: Median follow-up was 2...
October 20, 2017: Asia-Pacific Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29041627/71-mbit-s-ultraviolet-b-led-communication-link-based-on-8-qam-ofdm-modulation
#14
Xiaobin Sun, Zhenyu Zhang, Anas Chaaban, Tien Khee Ng, Chao Shen, Rui Chen, Jianchang Yan, Haiding Sun, Xiaohang Li, Junxi Wang, Jinmin Li, Mohamed-Slim Alouini, Boon S Ooi
A demonstration of ultraviolet-B (UVB) communication link is implemented utilizing quadrature amplitude modulation (QAM) orthogonal frequency-division multiplexing (OFDM). The demonstration is based on a 294-nm UVB-light-emitting-diode (UVB-LED) with a full-width at half-maximum (FWHM) of 9 nm and light output power of 190 μW, at 7 V, with a special silica gel lens on top of it. A -3-dB bandwidth of 29 MHz was measured and a high-speed near-solar-blind communication link with a data rate of 71 Mbit/s was achieved using 8-QAM-OFDM at perfect alignment...
September 18, 2017: Optics Express
https://www.readbyqxmd.com/read/28989211/high-resolution-free-triiodothyronine-thyrotropin-ft3-tsh-responses-to-a-single-oral-dose-of-liothyronine-in-humans-evidence-of-distinct-inter-individual-differences-unraveled-using-an-electrical-network-model
#15
Simon L Goede, Keith R Latham, Melvin Khee-Shing Leow, Jacqueline Jonklaas
The effects of a single oral dose of liothyronine (L-T3) on thyroid stimulating hormone (TSH) and other related thyroid system parameters are partly understood despite therapeutic use of this hormone over many decades. We characterize individualized responses of the hypothalamus-pituitary-thyroid (HPT) axis and its related temporal hormonal profile using an electrical network model. Based on thyroid hormone responses from blood samples using a single 50 μg oral dose of liothyronine in healthy persons with a normal operating euthyroid feedback HPT system, we derived an equivalent electrical circuit model for the system's responses...
March 2017: Journal of Biological Systems
https://www.readbyqxmd.com/read/28978237/exploring-the-trend-in-referrals-for-consideration-of-crs-and-hipec-to-understand-the-attitudes-of-clinicians-in-the-development-of-a-national-cancer-centre-programme-in-peritoneal-disease
#16
Weining Wang, Grace Hwei Ching Tan, Thakshayeni Skanthakumar, Claramae Shulyn Chia, Khee Chee Soo, Melissa Ching Ching Teo
INTRODUCTION: Cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) improve survival in selected patients with peritoneal metastases. However, only some patients who are potentially eligible for the procedure are considered and referred to the appropriate surgical department. By studying the trends of patients being considered for CRS and HIPEC in our centre, we hope to better understand the demographics of our patient cohort and the attitudes of physicians involved towards CRS and HIPEC...
October 30, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28970281/rna-binding-protein-ybx2-regulates-rna-stability-during-cold-induced-brown-fat-activation
#17
Dan Xu, Shaohai Xu, Aung Maung Maung Kyaw, Yen Ching Lim, Sook Yoong Chia, Diana Teh Chee Siang, Juan R Alvarez-Dominguez, Peng Chen, Melvin Khee-Shing Leow, Lei Sun
Recent years have seen an upsurge of interest on brown adipose tissue (BAT) to combat the epidemic of obesity and diabetes. How its development and activation are regulated at the post-transcriptional level, however, has yet to be fully understood. RNA binding proteins (RBPs) lie in the center of post-transcriptional regulation. To systemically study the role of RBPs in BAT, we profiled >400 RBPs in different adipose depots and identified Y-box binding protein 2 (Ybx2) as a novel regulator in BAT activation...
September 29, 2017: Diabetes
https://www.readbyqxmd.com/read/28957258/simple-statistical-channel-model-for-weak-temperature-induced-turbulence-in-underwater-wireless-optical-communication-systems
#18
Hassan Makine Oubei, Emna Zedini, Rami T ElAfandy, Abla Kammoun, Mohamed Abdallah, Tien Khee Ng, Mounir Hamdi, Mohamed-Slim Alouini, Boon S Ooi
In this Letter, we use laser beam intensity fluctuation measurements to model and describe the statistical properties of weak temperature-induced turbulence in underwater wireless optical communication (UWOC) channels. UWOC channels with temperature gradients are modeled by the generalized gamma distribution (GGD) with an excellent goodness of fit to the measured data under all channel conditions. Meanwhile, thermally uniform channels are perfectly described by the simple gamma distribution which is a special case of GGD...
July 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28917257/exploiting-molecular-genomics-in-precision-radiation-oncology-a-marriage-of-biological-and-physical-precision
#19
Janice S H Tan, Xiaotian Lin, Kevin L M Chua, Paula Y Lam, Khee-Chee Soo, Melvin L K Chua
Achieving local tumour control is paramount for cure in head and neck and prostate cancers. With the transition to precision radiotherapy (RT) techniques, survival rates have improved in the majority of these cancers, but a substantial proportion of 30-40% still relapse following primary treatment. Recent large-scale molecular profiling studies have revealed unique biological events that could explain for tumour aggression and resistance to therapies, redefining the molecular taxonomy of head and neck and prostate cancers...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28914916/continuous-wave-optically-pumped-green-perovskite-vertical-cavity-surface-emitter
#20
Mohd Sharizal Alias, Zhixiong Liu, Abdullah Al-Atawi, Tien Khee Ng, Tom Wu, Boon S Ooi
We report an optically pumped green perovskite vertical-cavity surface-emitter operating in continuous-wave (CW) with a power density threshold of ∼89  kW/cm(2). The device has an active region of CH3NH3PbBr3 embedded in a dielectric microcavity; this feat was achieved with a combination of optimal spectral alignment of the optical cavity modes with the perovskite optical gain, an adequate Q-factor of the microcavity, adequate thermal stability, and improved material quality with a smooth, passivated, and annealed thin active layer...
September 15, 2017: Optics Letters
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