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https://www.readbyqxmd.com/read/29240026/gemtuzumab-ozogamicin-containing-chemotherapy-for-relapsed-or-refractory-acute-myeloid-leukemia-aml-in-children
#1
Anthony Pak-Yin Liu, Alex Wing-Kwan Leung, Daniel Ka-Leung Cheuk, Vincent Lee, Shau-Yin Ha
No abstract text is available yet for this article.
December 12, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/29233185/phosphoproteomics-reveals-network-rewiring-to-a-pro-adhesion-state-in-annexin-1-deficient-mammary-epithelial-cells
#2
Asfa Alli-Shaik, Sheena Wee, Lina H K Lim, Jayantha Gunaratne
BACKGROUND: Annexin-1 (ANXA1) plays pivotal roles in regulating various physiological processes including inflammation, proliferation and apoptosis, and deregulation of ANXA1 functions has been associated with tumorigenesis and metastasis events in several types of cancer. Though ANXA1 levels correlate with breast cancer disease status and outcome, its distinct functional involvement in breast cancer initiation and progression remains unclear. We hypothesized that ANXA1-responsive kinase signaling alteration and associated phosphorylation signaling underlie early events in breast cancer initiation events and hence profiled ANXA1-dependent phosphorylation changes in mammary gland epithelial cells...
December 12, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29227795/divergent-effects-of-levetiracetam-and-tiagabine-against-spontaneous-seizures-in-adult-rats-following-neonatal-hypoxia
#3
Raymond Dunn, Bridget N Queenan, Daniel T S Pak, Patrick A Forcelli
Animal models are valuable tools for screening novel therapies for patients who suffer from epilepsy. However, a wide array of models are necessary to cover the diversity of human epilepsies. In humans, neonatal hypoxia (or hypoxia-ischemia) is one of the most common causes of epilepsy early in life. Hypoxia-induced seizures (HS) during the neonatal period can also lead to spontaneous seizures in adulthood. This phenomenon, i.e., early-life hypoxia leading to adult epilepsy - is also seen in experimental models, including rats...
December 5, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29227641/reversible-and-sensitive-hg2-detection-by-a-cell-permeable-ytterbium-complex
#4
Guochen Bao, Shuai Zha, Zhenyu Liu, Yan-Ho Fung, Chi-Fai Chan, Hongguang Li, Pak-Ho Chu, Dayong Jin, Peter A Tanner, Ka-Leung Wong
A cell-permeable ytterbium complex shows reversible binding with Hg2+ in aqueous solution and in vitroby off-on visible and NIR emission. The fast response and 150 nM sensitivity of Hg2+ detection is based upon FRET and the lanthanide antenna effect. The reversible Hg2+ detection can be performed in vitro, and the binding mechanism is suggested by NMR employing the motif structure in a La complex and by DFT calculations.
December 11, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29221024/rf-photonic-downconversion-of-vector-modulated-signals-based-on-a-millimeter-wave-coupled-electrooptic-nonlinear-polymer-phase-modulator
#5
Donghun Park, Vincent R Pagán, Pak S Cho, Jingdong Luo, Alex K-Y Jen, Paul V Petruzzi
We report the RF photonic reception and downconversion of vector modulated RF signals using a millimeter-wave coupled electrooptic phase modulator with in-plane slotted patch antennas based on SEO125 nonlinear polymer. We demonstrate experimental results with QPSK, 8-PSK, 16-QAM, 32-QAM, and 64-QAM millimeter-wave signals centered at 36 GHz. After downconversion to intermediate frequencies between 0.5 GHz and 2 GHz, the vector encoded signals are demodulated using an electrical signal analyzer and found to have measured error vector magnitudes below 8%...
November 27, 2017: Optics Express
https://www.readbyqxmd.com/read/29220424/genetically-deprived-vitamin-d-exposure-predisposes-to-atrial-fibrillation
#6
Yap-Hang Chan, Kai-Hang Yiu, Jo Jo Hai, Pak-Hei Chan, Tai-Hing Lam, Ben J Cowling, Pak-Chung Sham, Chu-Pak Lau, Karen Siu-Ling Lam, Chung-Wah Siu, Hung-Fat Tse
Aims: Low vitamin D level is associated with atrial fibrillation (AF) and may be implicated in its pathogenesis. Methods and results: We studied single nucleotide polymorphisms (SNPs) of vitamin D mechanistic pathways and serum 25-hydroxyvitamin D [25(OH)D] levels in an age- and gender-matched case-control study (controls without AF: mean age 68.6 ± 8.7 years, female 25%; n = 1019; with AF: mean age 69.7 ± 9.5 years, female 30%; n = 156) recruited from a Chinese clinical cohort of patients with stable coronary artery disease...
December 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29218926/-determination-of-eight-steroidal-saponins-in-15-kinds-of-genus-paris
#7
Yuan-Yuan Huang, Da-Hui Liu, Hua-Sheng Peng, Qing-Xiu Hao, Mei-Lan Chen, A-Zhong Zhang, Min Chen, Li-Ping Kang, Lu-Qi Huang
The study was established an HPLC method for simultaneous determination of 8 steroidal saponins (polyphyllins Ⅶ, H, Ⅵ, Ⅱ, Ⅰ, and Ⅴ, dioscin, and gracillin) in Paridis Rhizoma, and made an evaluation by determining steroidal saponins in 15 kinds of genus Paris. The analysis was performed on a Waters Acquity H-ClassTM UPLC ultrafine liquid chromatography system coupled with a PDA detector. The chromatographic separation was achieved through a CAPCELL PAK ADME (4.6 mm× 250 mm, 5 μm) column and the optimal mobile phase consisted of acetonitrile and water...
September 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29218259/melena-as-initial-presentation-of-adenocarcinoma-in-pancreatic-tail
#8
Stella Pak, Damian Valencia, James Kim, Christine Dee
Melena associated with gastric varices, in the setting of possible obstructing pancreatic adenocarcinoma, has been poorly documented as an initial presenting sign for pancreatic malignancy. Considering the late presentation of patients with pancreatic malignancy, it is important to consider all potential presenting symptoms for the early detection and treatment of pancreatic malignancy. Below, we present a patient with no history of liver pathology, who presents with melena and gastric varices, likely relating to portal hypertension in the setting of an obstructing pancreatic malignancy...
October 4, 2017: Curēus
https://www.readbyqxmd.com/read/29218258/breaking-the-magic-mouth-and-genital-ulcers-with-inflamed-cartilage-syndrome
#9
REVIEW
Stella Pak, Shaina Logemann, Christine Dee, Adam Fershko
Mouth and genital ulcers with inflamed cartilage (MAGIC) syndrome refers to a condition in which features of Behcet's disease (BD) and relapsing polychondritis (RP) occur in the same individual. The existence of MAGIC syndrome suggests a potential common etiology for BD and RP. However, connecting these two diseases and referring to this condition as MAGIC syndrome might have been premature, as there is currently insufficient knowledge on BD and RP. In this critical review, we argue that these two clinical entities could possibly be unique disease processes rather than two ends of the same disease spectrum...
October 4, 2017: Curēus
https://www.readbyqxmd.com/read/29217995/the-alteration-of-irisin-brain-derived-neurotrophic-factor-axis-parallels-severity-of-distress-disorder-in-bronchial-asthma-patients
#10
Magdolna E Szilasi, Krisztian Pak, Laszlo Kardos, Viktoria E Varga, Ildiko Seres, Angela Mikaczo, Andrea Fodor, Maria Szilasi, Gabor Tajti, Csaba Papp, Rudolf Gesztelyi, Judit Zsuga
Distress disorder (a collective term for generalized anxiety disorder and major depressive disorder) is a well-known co-morbidity of bronchial asthma. The irisin-brain-derived neurotrophic factor (BDNF) axis is a pathway that influences several neurobehavioral mechanisms involved in the pathogenesis of distress disorder. Thus, the aim of the present study was to quantify the serum irisin and BDNF concentrations in order to investigate the possible link between the irisin/BDNF axis and distress disorder in an asthma patient cohort...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29216819/transcriptomic-analysis-of-pak-choi-under-acute-ozone-exposure-revealed-regulatory-mechanism-against-ozone-stress
#11
Lu Zhang, Bin Xu, Tao Wu, Mu-Xuan Wen, Lian-Xue Fan, Zhao-Zhong Feng, Elena Paoletti
BACKGROUND: Ground-level ozone (O3) is one of the major air pollutants, which cause oxidative injury to plants. The physiological and biochemical mechanisms underlying the responses of plants to O3 stress have been well investigated. However, there are limited reports about the molecular basis of plant responses to O3. In this study, a comparative transcriptomic analysis of Pak Choi (Brassica campestris ssp. chinensis) exposed to different O3 concentrations was conducted for the first time...
December 8, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29216804/the-use-of-alpha-fetoprotein-for-the-treatment-of-autoimmune-diseases-and-cancer
#12
Vladimir N Pak
Alpha-fetoprotein is a shuttle protein that delivers nutrients through receptor-mediated endocytosis to embryotic cells. In adults, alpha-fetoprotein can shuttle drugs into alpha-fetoprotein receptor-positive myeloid-derived suppressor, regenerating and also cancer cells. Drugs with high-binding affinity to alpha-fetoprotein can activate or deplete targeted cells. Myeloid-derived suppressor cells activation leads to immune suppression that can be used for treating autoimmune diseases. On the other hand, toxins delivered by alpha-fetoprotein can damage myeloid-derived suppressor cells and consequently unleash innate and adaptive immunity to destroy cancer cells...
January 2018: Therapeutic Delivery
https://www.readbyqxmd.com/read/29215786/a-zero-dimensional-organic-seesaw-shaped-tin-bromide-with-highly-efficient-strongly-stokes-shifted-deep-red-emission
#13
Chenkun Zhou, Haoran Lin, Hongliang Shi, Yu Tian, Chongin Pak, Michael Shatruk, Yan Zhou, Peter Djurovich, Maohua Du, Biwu Ma
We report the synthesis and characterization of (C9NH20)2SnBr4, a novel organic metal halide hybrid with a zero-dimensional (0D) structure, in which individual seesaw-shaped tin (II) bromide anions (SnBr42-) are co-crystallized with 1-butyl-1-methylpyrrolidinium cations (C9NH20+). Upon photoexcitation, the bulk crystals exhibit a highly efficient broadband deep-red emission peaked at 695 nm, with a large Stokes shift of 332 nm and a high quantum efficiency of around 46%. The unique photophysical properties of this hybrid material are attributed to two major factors, (i) the 0D structure allowing the bulk crystals to exhibit the intrinsic properties of individual SnBr42- species, and (ii) the seesaw structure enabling a pronounced excited state structural deformation as confirmed by density functional theory (DFT) calculations...
December 7, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29212947/requirement-of-treg-intrinsic-ctla4-pkc%C3%AE-signaling-pathway-for-suppressing-tumor-immunity
#14
Christophe Pedros, Ann J Canonigo-Balancio, Kok-Fai Kong, Amnon Altman
The ability of Tregs to control the development of immune responses is essential for maintaining immune system homeostasis. However, Tregs also inhibit the development of efficient antitumor responses. Here, we explored the characteristics and mechanistic basis of the Treg-intrinsic CTLA4/PKCη signaling pathway that we recently found to be required for contact-dependent Treg-mediated suppression. We show that PKCη is required for the Treg-mediated suppression of tumor immunity in vivo. The presence of PKCη-deficient (Prkch-/-) Tregs in the tumor microenvironment was associated with a significantly increased expression of the costimulatory molecule CD86 on intratumoral CD103+ DCs, enhanced priming of antigen-specific CD8+ T cells, and greater levels of effector cytokines produced by these cells...
December 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/29209279/promoting-glucose-transporter-4-vesicle-trafficking-along-cytoskeletal-tracks-pak-ing-them-out
#15
REVIEW
Ragadeepthi Tunduguru, Debbie C Thurmond
Glucose is the principal cellular energy source in humans and maintenance of glucose homeostasis is critical for survival. Glucose uptake into peripheral skeletal muscle and adipose tissues requires the trafficking of vesicles containing glucose transporter-4 (GLUT4) from the intracellular storage compartments to the cell surface. Trafficking of GLUT4 storage vesicles is initiated via the canonical insulin signaling cascade in skeletal muscle and fat cells, as well as via exercise-induced contraction in muscle cells...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29205838/enhanced-performance-of-mos2-photodetectors-by-inserting-an-ald-processed-tio2-interlayer
#16
Yusin Pak, Woojin Park, Somak Mitra, Assa Aravindh Sasikala Devi, Kalaivanan Loganathan, Yogeenth Kumaresan, Yonghun Kim, Byungjin Cho, Gun-Young Jung, Muhammad M Hussain, Iman S Roqan
2D molybdenum disulfide (MoS2 ) possesses excellent optoelectronic properties that make it a promising candidate for use in high-performance photodetectors. Yet, to meet the growing demand for practical and reliable MoS2 photodetectors, the critical issue of defect introduction to the interface between the exfoliated MoS2 and the electrode metal during fabrication must be addressed, because defects deteriorate the device performance. To achieve this objective, the use of an atomic layer-deposited TiO2 interlayer (between exfoliated MoS2 and electrode) is reported in this work, for the first time, to enhance the performance of MoS2 photodetectors...
December 4, 2017: Small
https://www.readbyqxmd.com/read/29203664/structural-insights-into-how-gtp-dependent-conformational-changes-in-a-metallochaperone-ureg-facilitate-urease-maturation
#17
Man Hon Yuen, Yu Hang Fong, Yap Shing Nim, Pak Ho Lau, Kam-Bo Wong
The ability of metallochaperones to allosterically regulate the binding/release of metal ions and to switch protein-binding partners along the metal delivery pathway is essential to the metallation of the metalloenzymes. Urease, catalyzing the hydrolysis of urea into ammonia and carbon dioxide, contains two nickel ions bound by a carbamylated lysine in its active site. Delivery of nickel ions for urease maturation is dependent on GTP hydrolysis and is assisted by four urease accessory proteins UreE, UreF, UreG, and UreH(UreD)...
December 4, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29201809/long-esophageal-stricture-in-a-brittle-diabetic
#18
Stella C Pak, Umar Darr, Yaseen Alastal, Youngsook Yoon
Aim: We report a case of atypical esophageal stricture in a young diabetic woman. Background: Diabetes mellitus and gastroesophageal reflux disease (GERD) are two common disorders in modern society. Case report: A young diabetic woman developed a 6-cm-long esophageal stricture. This stricture was refractory to multiple esophageal dilation procedures. She underwent subtotal esophagectomy and had excellent treatment outcome. Conclusion: Gastroesophageal reflux disease can cause severe long esophageal stricture in a brittle diabetic...
July 2017: Euroasian Journal of Hepato-Gastroenterology
https://www.readbyqxmd.com/read/29201801/viral-hepatitis-in-south-korea
#19
Stella C Pak, Yaseen Alastal, Zubair Khan, Umar Darr
In South Korea (S. Korea), viral hepatitis is a major public health burden. Advances in healthcare policy, evidence-based medicine, and therapeutic strategies in S. Korea have brought a rapid change in the sociodemographic and clinical characteristics of viral hepatitis. This review discusses the innovative approaches that S. Korea has taken to curb the epidemic of viral hepatitis. In addition, the efficacy of various preventive and therapeutic modalities is discussed. This review aims to provide a brief overview to guide future research direction and healthcare policy changes...
July 2017: Euroasian Journal of Hepato-Gastroenterology
https://www.readbyqxmd.com/read/29200905/mptp-induced-vulnerability-of-dopamine-neurons-in-a53t-%C3%AE-synuclein-overexpressed-mice-with-the-potential-involvement-of-dj-1-downregulation
#20
Seongmi Lee, Seung Tack Oh, Ha Jin Jeong, Sok Cheon Pak, Hi-Joon Park, Jongpil Kim, Hyun-Seok Cho, Songhee Jeon
Familial Parkinson's disease (PD) has been linked to point mutations and duplication of the α-synuclein (α-syn) gene. Mutant α-syn expression increases the vulnerability of neurons to exogenous insults. In this study, we developed a new PD model in the transgenic mice expressing mutant hemizygous (hemi) or homozygous (homo) A53T α-synuclein (α-syn Tg) and their wildtype (WT) littermates by treatment with sub-toxic (10 mg/kg, i.p., daily for 5 days) or toxic (30 mg/kg, i.p., daily for 5 days) dose of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)...
November 2017: Korean Journal of Physiology & Pharmacology
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