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https://www.readbyqxmd.com/read/28550664/-synergistic-lethal-effect-of-combined-treatment-of-arsenic-trioxide-and-aclacinomycin-on-human-acute-myeloid-leukemia-cell-line-kg-1a
#1
Y B Ye, X J Xu, Y H Chen, M W Zhang, D F Qiu, Z W Guo, H Q He
Objective: To investigate the synergistic lethal effect and mechanism of arsenic trioxide (ATO) and aclacinomycin (ACM) on human acute myeloid leukemia cell line KG-1a. Methods: Colony-forming assay was used to detect the proliferation of KG-1a cells treated with different concentration of ATO and ACM. Compusyn software was used to analyze the synergistic effect of ATO and ACM. Flow cytometry and Wright's staining were used to analyze the apoptotic rate of KG-1a cells induced by combined treatment of ATO and ACM...
April 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28550292/proteomic-comparisons-of-opaque-and-transparent-variants-of-streptococcus-pneumoniae-by-two-dimensional-differential-gel-electrophoresis
#2
Melissa H Chai, Florian Weiland, Richard M Harvey, Peter Hoffmann, Abiodun D Ogunniyi, James C Paton
Streptococcus pneumoniae (the pneumococcus) is a human pathogen, accounting for massive global morbidity and mortality. Although asymptomatic colonization of the nasopharynx almost invariably precedes disease, the critical determinants enabling pneumococcal progression from this niche to cause invasive disease are poorly understood. One mechanism proposed to be central to this transition involves opacity phase variation, whereby pneumococci harvested from the nasopharynx are typically transparent, while those simultaneously harvested from the blood are opaque...
May 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28550267/amyloid-precursor-protein-haploinsufficiency-preferentially-mediates-brain-iron-accumulation-in-mice-transgenic-for-the-huntington-s-disease-mutation
#3
Kiersten Berggren, Sonal Agrawal, Julia A Fox, Justin Hildenbrand, Ryan Nelson, Ashley I Bush, Jonathan H Fox
BACKGROUND: Huntington's disease (HD) is an autosomal dominant disorder caused by a CAG expansion in the huntingtin gene that results in expression of mutant huntingtin protein. Iron accumulates in HD brain neurons. Amyloid precursor protein (APP) promotes neuronal iron export. However, the role of APP in brain iron accumulation in HD is unclear. OBJECTIVE: To determine the effects of APP insufficiency on HD in YAC128 mice. METHODS: We crossed APP hemizygous mice (APP+/-) with YAC128 mice that are transgenic (Tg) for human mutant huntingtin (hmHTT) to generate APP+/+ hmHTT-/-, APP+/- hmHTT-/-, APP+/+ hmHTT+/- and APP+/- hmHTT+/- progeny...
May 24, 2017: Journal of Huntington's Disease
https://www.readbyqxmd.com/read/28549901/degradation-of-proteoglycan-4-lubricin-by-cathepsin-s-potential-mechanism-for-diminished-ocular-surface-lubrication-in-sj%C3%A3-gren-s-syndrome
#4
Suresh C Regmi, Michael L Samsom, Miriam Heynen, Gregory D Jay, Benjamin D Sullivan, Sruthi Srinivasan, Barbara Caffery, Lyndon Jones, Tannin A Schmidt
Sjögren's syndrome (SS) is an autoimmune disease affecting the lacrimal and salivary glands with hallmark clinical symptoms of dry eye and dry mouth. Recently, markedly increased cathepsin S (CTSS) activity has been observed in the tears of SS patients. Proteoglycan 4 (PRG4), also known as lubricin, is an effective boundary lubricant that is naturally present on the ocular surface. While PRG4 is susceptible to proteolytic digestion, the potential effect of CTSS on PRG4 remains unknown. The objective of this study was to assess the ability of CTSS to enzymatically degrade purified PRG4, and PRG4 naturally present in human tears, and alter ocular surface boundary lubricating properties...
May 23, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28549840/phosphatidylinositol-4-5-bisphosphate-mediated-pathophysiological-effect-of-hiv-1-tat-protein
#5
REVIEW
Bruno Beaumelle, Petra Tóth, Olfat A Malak, Christophe Chopard, Gildas Loussouarn, Nicolas Vitale
Human immunodeficiency virus (HIV)-infected cells actively release the transcriptional activator (Tat) viral protein that is required for efficient HIV gene transcription. Extracellular Tat is able to enter uninfected cells. We recently reported that internalized Tat escapes endosomes to reach the cytosol and is then recruited to the plasma membrane by phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2). As a consequence, Tat strongly impairs different critical cellular functions in several cell types. Here we will review recent evidences showing that Tat, by affecting the interaction of key cellular effectors with PtdIns(4,5)P2, blocks exocytosis from neuroendocrine cells, perturbs the synaptic vesicle exo-endocytosis cycle, prevents efficient phagocytosis by macrophages, and alters potassium channel activity in cardiac cells...
May 23, 2017: Biochimie
https://www.readbyqxmd.com/read/28549533/performance-of-roma-based-on-architect-ca-125-ii-and-he4-values-in-chinese-women-presenting-with-a-pelvic-mass-a-multicenter-prospective-study
#6
Fengxian Shen, Shiming Lu, Yibing Peng, Fan Yang, Yan Chen, Yingying Lin, Chen Yang, Li Wu, Huijun Li, Yijie Zheng
BACKGROUND: We evaluated the performance of human epididymis protein 4 (HE4), cancer antigen 125(CA 125) and Risk of Ovarian Malignancy Algorithm (ROMA) in distinguishing between benign and malignant pelvic masses in Chinese women. METHOD: From April to December 2012, women with a pelvic mass scheduled to have surgery were enrolled in a prospective, multi-center study conducted in 5 different regions in China. Preoperative serum concentrations of HE4 and CA 125 were examined and ROMA was calculated...
May 23, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28549401/human-in-situ-cytokine-and-leukocyte-responses-to-acute-smoking
#7
Tegan Kastelein, Rob Duffield, Frank Marino
This study examined immune/inflammatory parameters following an acute tobacco smoking episode in smokers with varying smoking histories. Twenty-eight male habitual smokers were categorized according to smoking history, e.g. younger smoker (YSM) or middle-aged smoker (MSM). Participants were matched for fitness and smoking habits and following baseline testing, undertook a smoking protocol involving consumption of two cigarettes within 15 min. Venous blood was collected pre- and immediately, 1 h, and 4 h post-protocol to permit analyses of circulating levels of interleukin (IL)-6, IL-1β, IL-1ra, monocyte chemoattractant protein-1 (MCP-1), C-reactive protein (CRP), and leukocytes...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28549265/facile-screening-of-potential-xenoestrogens-by-an-estrogen-receptor-based-reusable-optical-biosensor
#8
Lanhua Liu, Xiaohong Zhou, Yun Lu, Didi Shan, Bi Xu, Miao He, Hanchang Shi, Yi Qian
The apparent increase in hormone-induced cancers and disorders of the reproductive tract has led to a growing demand for new technologies capable of screening xenoestrogens. We reported an estrogen receptor (ER)-based reusable fiber biosensor for facile screening estrogenic compounds in environment. The bioassay is based on the competition of xenoestrogens with 17β-estradiol (E2) for binding to the recombinant receptor of human estrogen receptor α (hERα) protein, leaving E2 free to bind to fluorophore-labeled anti-E2 monoclonal antibody...
May 18, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28548957/involvement-of-p38-%C3%AE-trcp-tristetraprolin-tnf%C3%AE-axis-in-radiation-pneumonitis
#9
Pranathi Meda Krishnamurthy, Shirish Shukla, Paramita Ray, Rohit Mehra, Mukesh K Nyati, Theodore S Lawrence, Dipankar Ray
Early release of tumor necrosis factor-alpha (TNF-α) during radiotherapy of thoracic cancers plays an important role in radiation pneumonitis, whose inhibition may provide lung radioprotection. We previously reported radiation inactivates Tristetraprolin (TTP), a negative regulator of TNF-α synthesis, which correlated with increased TNF-α release. However, the molecular events involved in radiation-induced TTP inactivation remain unclear. To determine if eliminating Ttp in mice resulted in a phenotypic response to radiation, Ttp-null mice lungs were exposed to a single dose of 15 Gy, and TNF-α release and lung inflammation were analyzed at different time points post-irradiation...
May 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28548219/platycodin-d-a-triterpenoid-saponin-from-platycodon-grandiflorum-suppresses-the-growth-and-invasion-of-human-oral-squamous-cell-carcinoma-cells-via-the-nf-%C3%AE%C2%BAb-pathway
#10
Zhiyong Zhang, Minchao Zhao, Wenxuan Zheng, Yonghong Liu
This work was undertaken to explore the effects of platycodin D, a triterpenoid saponin from Platycodon grandiflorum, on the growth and invasiveness of human oral squamous cell carcinoma (OSCC). Platycodin D caused a significant, concentration-dependent inhibition of cell viability and induced significant apoptosis in OSCC cells. Moreover, platycodin D significantly inhibited OSCC cell invasion. At the molecular level, platycodin D increased the amounts of IκBα protein and reduced the expression of phosphorylated NF-κB p65, MMP-2, and MMP-9...
May 26, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28547807/tnfsf9-exerts-an-inhibitory-effect-on-hepatocellular-carcinoma
#11
Yuling Shen, Yu Gan, Haifeng Gao, Yingchao Fan, Qing Wang, Hui Yuan, Yanfang Song, Jiadong Wang, Hong Tu
AIM: Tumor necrosis factor superfamily member 9 (TNFSF9), also known as 4-1BBL and CD137L, has been implicated in cancer immunotherapy due to its function as a T cell costimulator. However, little is known about its direct impact on cancer development, particularly for solid tumors. METHODS: The TNFSF9 expression was examined by immunohistochemistry in 106 pairs of hepatocellular carcinoma (HCC) and the adjacent non-HCC tissues, and by quantitative PCR and Western blot in HCC cell lines...
May 26, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28546635/local-cryotherapy-minimally-impacts-the-metabolome-and-transcriptome-of-human-skeletal-muscle
#12
Dylan C Sarver, Kristoffer B Sugg, Nathaniel P Disser, Elizabeth R Sibilsky Enselman, Tariq M Awan, Christopher L Mendias
Cryotherapy is commonly used in the treatment of skeletal muscle injuries. However, the data to support the use of cryotherapy is inconclusive, and the biochemical etiology of cryotherapy in human skeletal muscle remains largely unknown. We therefore sought to determine how a clinically-relevant dose of cryotherapy would impact the transcriptome and metabolome of skeletal muscle. Eight healthy male subjects (age 24.7 ± 4.5 years, BMI 22.2 ± 1.6) received a 15 minute bout of local cryotherapy, delivered via ice cup massage over the anterolateral thigh...
May 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28546218/adamts5-deficiency-in-calcified-aortic-valves-is-associated-with-elevated-pro-osteogenic-activity-in-valvular-interstitial-cells
#13
Fei Li, Rui Song, Lihua Ao, T Brett Reece, Joseph C Cleveland, Nianguo Dong, David A Fullerton, Xianzhong Meng
OBJECTIVE: Extracellular matrix proteinases are implicated in the pathogenesis of calcific aortic valve disease. The ADAMTS5 (a disintegrin and metalloproteinase with thrombospondin motifs 5) enzyme is secreted, matrix-associated metalloendopeptidase, capable of degrading extracellular matrix proteins, particularly matrilin 2. We sought to determine the role of the ADAMTS5/matrilin 2 axis in mediating the phenotype transition of valvular interstitial cells (VICs) associated with calcific aortic valve disease...
May 25, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28545881/high-fat-diet-and-saturated-fatty-acid-palmitate-inhibits-igf-1-function-in-chondrocytes
#14
Sumaiya A Nazli, Richard F Loeser, Susan Chubinskaya, Jeffrey S Willey, Raghunatha R Yammani
INTRODUCTION: Insulin-like growth factor-1 (IGF-1) promotes matrix synthesis and cell survival in cartilage. Chondrocytes from aged and osteoarthritic cartilage have a reduced response to IGF-1. The purpose of this study was to determine the effect of free fatty acids present in a high-fat diet on IGF-1 function in cartilage and the role of ER stress. METHODS: C57BL/6 male mice were maintained on either a high-fat (60% kcal from fat) or a low-fat (10% kcal from fat) diet for 4 months...
May 22, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28545724/the-role-of-ca-2-in-cell-death-caused-by-oxidative-glutamate-toxicity-and-ferroptosis
#15
REVIEW
Pamela Maher, Klaus van Leyen, Partha Narayan Dey, Birgit Honrath, Amalia Dolga, Axel Methner
Ca(2+) ions play a fundamental role in cell death mediated by oxidative glutamate toxicity or oxytosis, a form of programmed cell death similar and possibly identical to other forms of cell death like ferroptosis. Ca(2+) influx from the extracellular space occurs late in a cascade characterized by depletion of the intracellular antioxidant glutathione, increases in cytosolic reactive oxygen species and mitochondrial dysfunction. Here, we aim to compare oxidative glutamate toxicity with ferroptosis, address the signaling pathways that culminate in Ca(2+) influx and cell death and discuss the proteins that mediate this...
May 12, 2017: Cell Calcium
https://www.readbyqxmd.com/read/28545522/brd4-inhibition-suppresses-cell-growth-migration-and-invasion-of-salivary-adenoid-cystic-carcinoma
#16
Limei Wang, Xiuyin Wu, Ruolin Wang, Chengzhe Yang, Zhi Li, Cunwei Wang, Fenghe Zhang, Pishan Yang
BACKGROUND: Bromodomain-containing protein 4 (BRD4) inhibition is a new therapeutic strategy for many malignancies. In this study, we aimed to explore the effect of BRD4 inhibition by JQ1 on in vitro cell growth, migration and invasion of salivary adenoid cystic carcinoma (SACC). METHODS: The human normal epithelial cells and SACC cells (ACC-LM and ACC-83) were treated with JQ1 at concentrations of 0, 0.1, 0.5 or 1 μM. Cell Counting Kit-8 (CCK-8) assay was performed to evaluate cell proliferation...
May 25, 2017: Biological Research
https://www.readbyqxmd.com/read/28545271/-effect-of-microrna-106b-on-the-invasion-and-proliferation-of-trophoblasts-through-targeting-mmp-2
#17
J Li, J M Wang, Y H Liu, Z Zhang, N Han, J Y Wang, S H Xue, P Wang
Objective: To investigate the expression of microRNA-106b (miR-106b) in the placentas of patients with pre-eclampsia and its relationship with matrix metallopeptidase (MMP) -2, and its effect on the invasion and proliferation of trophoblasts. Methods: (1) Placental tissues were collected from patients with mild pre-eclampsia (mPE, n=30), severe pre-eclampsia (sPE, n=30) and normal pregnant women (n=40). Human choriocarcinoma cell lines JAR and JEG3 were assigned to the miR-106b mimics group, the mimics negative control group, the miR-106b inhibitor group and the inhibitor negative control group, respectively...
May 25, 2017: Zhonghua Fu Chan Ke za Zhi
https://www.readbyqxmd.com/read/28545138/sumo-4-a-novel-functional-candidate-in-the-human-placental-protein-sumoylation-machinery
#18
Dora Baczyk, Melanie C Audette, Sascha Drewlo, Khrystyna Levytska, John C Kingdom
BACKGROUND: Small ubiquitin-like modifiers (SUMOs) conjugate to proteins post-translationally, thereby affecting target localization, activity and stability. Functional SUMO family members identified in the human placenta include SUMO-1 to SUMO-3, which are elevated in pre-eclampsia. Whether the fourth isoform, SUMO-4, plays a role in placental development and function remains unknown. OBJECTIVES: We tested the hypothesis that SUMO-4 is expressed in the human placenta and demonstrates altered SUMOylation in pre-eclamptic pregnancies...
2017: PloS One
https://www.readbyqxmd.com/read/28544328/acetylcholine-related-proteins-in-non-neoplastic-appearing-colonic-mucosa-from-patients-with-colorectal-neoplasia
#19
Morten Matthiesen Bach Damm, Thorbjørn Søren Rønn Jensen, Badar Mahmood, Morten Lundh, Steen Seier Poulsen, Niels Bindslev, Mark Berner Hansen
The pathogenesis of colorectal neoplasia (CRN) has been associated with altered non-neuronal acetylcholine (ACh) metabolism. The aim of this study was to characterize expression, function and cellular location of ACh-related proteins in biopsies obtained from endoscopic normal appearing sigmoid colon in patients with and without CRN. Messenger-RNA (mRNA) levels of 17 ACh-related proteins were quantified by rt-qPCR. Functional responses to ACh, measured as electrogenic transepithelial short circuit current (SCC), were recorded using the Ussing chamber technique...
May 23, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28544152/a-risk-adapted-approach-to-treating-respiratory-syncytial-virus-and-human-parainfluenza-virus-in-allogeneic-stem-cell-transplantation-recipients-with-oral-ribavirin-therapy-a-pilot-study
#20
José Luis Piñana, Juan Carlos Hernández-Boluda, Marisa Calabuig, Isabel Ballester, Manuela Marín, Silvia Madrid, Anabel Teruel, María-José Terol, David Navarro, Carlos Solano
Here we report the applicability of a protocol based on clinical conditions and risk factors (RFs) for managing 35 allogeneic hematopoietic stem cell transplantation (allo-HSCT) recipients who developed a total of 52 episodes of respiratory viral infections (RVIs) caused by respiratory syncytial virus (RSV; n=19), human parainfluenza virus (HPIV; n=29), or both (n=4) over a 2-year study period. Risk categories were classified as high risk (cat-1) when the immunodeficiency scoring index) was ≥ 3 and/or ≥ 3 RFs and/or ≥ 1 co-infective virus(es) were present; the remaining cases were classified as low risk (cat-0)...
May 19, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
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