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https://www.readbyqxmd.com/read/28627372/regulatory-role-of-melatonin-and-bmp-4-in-prolactin-production-by-rat-pituitary-lactotrope-gh3-cells
#1
Kanako Ogura-Ochi, Satoshi Fujisawa, Nahoko Iwata, Motoshi Komatsubara, Yuki Nishiyama, Naoko Tsukamoto-Yamauchi, Kenichi Inagaki, Jun Wada, Fumio Otsuka
The effects of melatonin on prolactin production and its regulatory mechanism remain uncertain. We investigated the regulatory role of melatonin in prolactin production using rat pituitary lactotrope GH3 cells by focusing on the bone morphogenetic protein (BMP) system. Melatonin receptor activation, induced by melatonin and its receptor agonist ramelteon, significantly suppressed basal and forskolin-induced prolactin secretion and prolactin mRNA expression in GH3 cells. The melatonin MT2 receptor was predominantly expressed in GH3 cells, and the inhibitory effects of melatonin on prolactin production were reversed by treatment with the receptor antagonist luzindole, suggesting functional involvement of MT2 action in the suppression of prolactin release...
June 13, 2017: Peptides
https://www.readbyqxmd.com/read/28617033/a-uplc-ms-ms-method-for-quantification-of-5%C3%AE-androst-3%C3%AE-5-6%C3%AE-triol-in-human-plasma-development-validation-and-its-application-in-clinical-pharmacokinetic-study
#2
Zhenlei Wang, Huanhuan Wang, Pei Hu, Ji Jiang, Qian Zhao
AIM: 5α-androst-3β,5,6β-triol is a novel ischemic stroke drug under clinical development. The objective of this study was to develop and validate a simple ultraperformance liquid chromatography tandem mass spectrometry method for 5α-androst-3β,5,6β-triol in human plasma and its application in clinical pharmacokinetic study. Methodology & results: After being pretreated using an automatized solid-phase extraction procedure, plasma sample was separated on a Waters(®) Acquity™ BEH C18 column (2...
June 15, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28608655/endoscopic-evaluation-of-iron-deficiency-without-anemia-does-it-have-the-same-benefit-as-in-patients-with-anemia
#3
Ana García García de Paredes, Carlos Teruel Sánchez-Vegazo, Nerea Hernanz Ruiz, Carlos Ferre Aracil, Enrique Rodríguez de Santiago, Lara Aguilera Castro, María Sierra Morales, Agustín Albillos
BACKGROUND AND AIM: The need for endoscopic investigation in patients with iron deficiency without anemia (ID) is not established. METHODS: Data from patients with ID (serum ferritin ≤20 ng/mL, normal hemoglobin) studied with upper and lower endoscopy were retrospectively analyzed. Patients evaluated for iron deficiency anemia (IDA) served as controls, matched by sex and age in a proportion 2:1. Presence, type, location and age distribution of endoscopic findings were compared...
June 13, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28587325/sildenafil-suppresses-the-proliferation-and-enhances-the-apoptosis-of-hemangioma-endothelial-cells
#4
Xiaopo He, Yiran Liu, Kai Li, Aijun Yang, Rui Wang, Shaohua Liu
Treatment of infantile hemangiomas (IH) with propranolol was first reported in 2008. Regressions of lymphatic malformations combined with pulmonary hypertension was first reported in 2012 after three children received treatment with oral sildenafil, which serves as an antagonist of phosphodiesterase isoform-5 (PDE-5). A marked expression of endothelial cells in the cytoplasm of IH tissues was obtained in our previous study. Therefore, the present study hypothesized that the antagonist of PDE-5, sildenafil, may lead to the regression of hemangiomas...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28549790/the-inhibitor-of-differentiation-1-id1-enables-lung-cancer-liver-colonization-through-activation-of-an-emt-program-in-tumor-cells-and-establishment-of-the-pre-metastatic-niche
#5
Eduardo Castañón, Alex Soltermann, Inés López, Marta Román, Margarita Ecay, María Collantes, Miriam Redrado, Iosune Baraibar, José María López-Picazo, Christian Rolfo, Fernando Vidal-Vanaclocha, Luis Raez, Walter Weder, Alfonso Calvo, Ignacio Gil-Bazo
Id1 promotes carcinogenesis and metastasis, and predicts prognosis of non-small cell lung cancer (NSCLC)-adenocarcionoma patients. We hypothesized that Id1 may play a critical role in lung cancer colonization of the liver by affecting both tumor cells and the microenvironment. Depleted levels of Id1 in LLC (Lewis lung carcinoma cells, LLC shId1) significantly reduced cell proliferation and migration in vitro. Genetic loss of Id1 in the host tissue (Id1(-/-) mice) impaired liver colonization and increased survival of Id1(-/-) animals...
May 24, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28529558/sirna-mediated-knockdown-of-id1-disrupts-nanog-and-oct-4-mediated-cancer-stem-cell-likeness-and-resistance-to-chemotherapy-in-gastric-cancer-cells
#6
Linlin Li, Xiaoyong Wei, Baofeng Wu, Yuanli Xiao, Mingzhu Yin, Qiaohong Yang
DNA-binding protein inhibitor ID-1 (ID1) serves an essential role in tumor progression, and the self-renewal and pluripotency of embryonic stem cells. However, the effect of ID1 on the stemness and cancer stem cell (CSC)-like properties of gastric adenocarcinoma cells remains to be elucidated. In the present study, effective ID1 knockdown was achieved in gastric cancer (GC) cells using small interfering RNA, and the self-renewal ability and cisplatin (DDP) sensitivity of GC cells was subsequently examined. ID1 knockdown in the MKN-28 and MGC-803 cell lines was demonstrated to significantly suppress colony formation (P=0...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28471350/antiviral-therapy-reduces-risk-of-haemorrhagic-stroke-in-patients-with-hcv-infection-a-nationwide-cohort-study
#7
Ming-Shyan Lin, Chang-Min Chung, Wey-Yil Lin, Kuo-Liang Wei, Jui Wang, Ying-Ying Lee, Jing-Hong Hu, Tao-Hsin Tung, Yu-Sheng Lin
BACKGROUND: The tendency for haemorrhagic stroke in patients with chronic hepatitis C virus (HCV) infection has emerged recently but the finding may be confounded by comorbidities. Proving the causality between HCV infection and haemorrhagic stroke is mandatory. Our study was designed to investigate the incidence of intracranial haemorrhage in HCV-infected patients with and without treatment. METHODS: In the 11-year and population-based retrospective study, we acquired data from the Taiwan National Health Insurance Research Database...
May 4, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28428134/use-of-physiological-biomarkers-in-diagnosis-along-with-field-trials-of-different-trypanisidal-drugs-in-camels-of-cholistan-desert
#8
Aneela Zameer Durrani, Zubair Bashir, Khalid Mehmood, Muhammad Avais, Haroon Akbar, Waqas Ahmad, Muhammad Azeem
The point prevalence of trypanosomiasis with different physiological biomarkers along with evaluation of the most responsive trypanosidal drug against trypanosomiasis under field conditions was studied. For this purpose a total of 300 free range camels were selected at different grazing and watering point in Cholistan desert. The study population of camels included 150 clinically suspected camels for trypanosomiasis and 150 healthy camels with normal temperature, pulse and respiration. For therapeutic trials 36 positively diagnosed animals were randomly divided into three experimental groups for therapeutic trials...
July 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28415442/small-intestinal-submucosa-a-potential-osteoconductive-and-osteoinductive-biomaterial-for-bone-tissue-engineering
#9
Mei Li, Chi Zhang, Mengjie Cheng, Qiaoqiao Gu, Jiyuan Zhao
SIS is an acellular, naturally occurring collagenous extracellular matrix (ECM) material with various bioactive factors, which broadly applied in tissue engineering in clinic. Several studies have applied SIS in bone tissue engineering to enhance bone regeneration in animal models. However, the mechanism was rarely investigated. The aim of the current study was to investigate the osteoconductivity and osteoinductivity of SIS scaffold to bone regeneration systematically and the potential mechanism. Our results showed that SIS scaffold with excellent biocompatibility was beneficial for cell attachment, proliferation, migration and osteogenic differentiation of various cells contributing to bone repair...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28382387/high-soluble-endoglin-levels-do-not-induce-changes-in-structural-parameters-of-mouse-heart
#10
Jana Rathouska, Petra Fikrova, Alena Mrkvicova, Katerina Blazickova, Michala Varejckova, Eva Dolezelova, Ivana Nemeckova, Barbora Vitverova, Lenka Peslova, Eunate Gallardo-Vara, Miguel Pericacho, Petr Nachtigal
A soluble form of endoglin (sEng) released into the circulation was suggested to be a direct inducer of endothelial dysfunction, inflammation and contributed to the development of hypertension by interfering with TGF-β signaling in cardiovascular pathologies. In the present study, we assessed the hypothesis that high sEng level-induced hypertension via a possible sEng interference with TGF-β signaling pathways may result in inflammatory, structural or fibrotic changes in hearts of Sol-Eng+ mice (mice with high levels of soluble endoglin) fed either chow or high-fat diet...
April 5, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28336397/soluble-endoglin-modulates-the-pro-inflammatory-mediators-nf-%C3%AE%C2%BAb-and-il-6-in-cultured-human-endothelial-cells
#11
Michala Varejckova, Eunate Gallardo-Vara, Matej Vicen, Barbora Vitverova, Petra Fikrova, Eva Dolezelova, Jana Rathouska, Alena Prasnicka, Katerina Blazickova, Stanislav Micuda, Carmelo Bernabeu, Ivana Nemeckova, Petr Nachtigal
AIMS: Endoglin is a transmembrane glycoprotein, that plays an important role in regulating endothelium. Proteolytic cleavage of membrane endoglin releases soluble endoglin (sEng), whose increased plasma levels have been detected in diseases related to the cardiovascular system. It was proposed that sEng might damage vascular endothelium, but detailed information about the potential mechanisms involved is not available. Thus, we hypothesized that sEng contributes to endothelial dysfunction, leading to a pro-inflammatory phenotype by a possible modulation of the TGF-β and/or inflammatory pathways...
April 15, 2017: Life Sciences
https://www.readbyqxmd.com/read/28288784/development-and-validation-of-a-measurement-procedure-based-on-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry-for-simultaneous-measurement-of-%C3%AE-lactam-antibiotic-concentration-in-human-plasma
#12
Raül Rigo-Bonnin, Alba Ribera, Ariadna Arbiol-Roca, Sara Cobo-Sacristán, Ariadna Padullés, Òscar Murillo, Evelyn Shaw, Rosa Granada, Xosé L Pérez-Fernández, Fe Tubau, Pedro Alía
BACKGROUND: The administration of β-lactam antibiotics in continuous infusion could let optimize the pharmacokinetic/pharmacodynamic parameters, especially in the treatment of serious bacterial infections. In this context, and also due to variability in their plasmatic concentrations, therapeutic drug monitoring (TDM) may be useful to optimize dosing and, therefore, be useful for the clinicians. MATERIAL AND METHODS: We developed and validated a measurement procedure based on ultra-high performance liquid chromatography-tandem mass spectrometry for simultaneous measurement of amoxicillin, ampicillin, cloxacillin, piperacillin, cefepime, ceftazidime, cefuroxime, aztreonam and meropenem concentrations in plasma...
March 10, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28208103/caring-for-children-with-intellectual-disabilities-part-1-experience-with-the-population-pain-related-beliefs-and-care-decisions
#13
Lara M Genik, C Meghan McMurtry, Lynn M Breau
Some children with intellectual disabilities (ID): experience pain more frequently than children without ID, express their pain differently, and are incapable of providing self-reports. No research has examined disability and pain-related beliefs of respite workers (RW) and their relations to pain assessment and management decisions for children with ID. OBJECTIVES: (1) compare disability and pain-related beliefs between RW and a sample with little experience in ID; (2) determine whether individuals' beliefs and personal characteristics are related to pain assessment and management decisions...
March 2017: Research in Developmental Disabilities
https://www.readbyqxmd.com/read/28194004/genetic-contributions-to-self-reported-tiredness
#14
V Deary, S P Hagenaars, S E Harris, W D Hill, G Davies, D C M Liewald, A M McIntosh, C R Gale, I J Deary
Self-reported tiredness and low energy, often called fatigue, are associated with poorer physical and mental health. Twin studies have indicated that this has a heritability between 6 and 50%. In the UK Biobank sample (N=108 976), we carried out a genome-wide association study (GWAS) of responses to the question, 'Over the last two weeks, how often have you felt tired or had little energy?' Univariate GCTA-GREML found that the proportion of variance explained by all common single-nucleotide polymorphisms for this tiredness question was 8...
February 14, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28165774/factors-and-costs-associated-with-delay-in-treatment-initiation-and-prolonged-length-of-stay-with-inpatient-epoch-chemotherapy-in-patients-with-hematologic-malignancies
#15
Melissa K Accordino, Jason D Wright, Sowmya Vasan, Alfred I Neugut, Grace C Hillyer, Dawn L Hershman
Reducing delays related to inpatient chemotherapy may reduce healthcare costs. Using a national database, we identified patients with lymphoma/leukemia with ≥1 etoposide, vincristine, doxorubicin, cyclophosphamide, and prednisone (EPOCH) chemotherapy claim and evaluated chemotherapy initiation delay (ID), >1 day from admission. Standard tests/procedures prior to initiation were evaluated. Among 4453 inpatient cycles, 19.7% had ID, odds ratio 2.28 (95% confidence interval: 1.83-2.85) with cycle 1 compared to cycle 2, and mean costs were higher in patients with ID than without ID (p < ...
March 16, 2017: Cancer Investigation
https://www.readbyqxmd.com/read/28141509/development-validation-and-testing-costs-of-an-in-house-real-time-pcr-assay-for-the-detection-of-chlamydia-trachomatis
#16
Camila Gurgel Dos Santos, Meritxell Sabidó, André Luiz Leturiondo, Cynthia de Oliveira Ferreira, Thielle Pereira da Cruz, Adele Schwartz Benzaken
PURPOSE: To improve the screening of Chlamydia trachomatis(C. trachomatis) in Brazil, an accurate and affordable method is needed. The objective of this study was to develop and assess the performance and costs of a new in-house real-time PCR (qPCR) assay for the diagnosis of C. trachomatis infection. METHODOLOGY: Asymptomatic women aged 14-25 years who attended primary health services in Manaus, Brazil, were screened for C. trachomatis using the Digene Hybrid Capture II CT-ID (HCII CT-ID) DNA test...
March 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28067796/combined-effects-of-androgen-and-growth-hormone-on-osteoblast-marker-expression-in-mouse-c2c12-and-mc3t3-e1-cells-induced-by-bone-morphogenetic-protein
#17
Kosuke Kimura, Tomohiro Terasaka, Nahoko Iwata, Takayuki Katsuyama, Motoshi Komatsubara, Ryota Nagao, Kenichi Inagaki, Fumio Otsuka
Osteoblasts undergo differentiation in response to various factors, including growth factors and steroids. Bone mass is diminished in androgen- and/or growth hormone (GH)-deficient patients. However the functional relationship between androgen and GH, and their combined effects on bone metabolism, remains unclear. Here we investigated the mutual effects of androgen and GH on osteoblastic marker expression using mouse myoblastic C2C12 and osteoblast-like MC3T3-E1 cells. Combined treatment with dihydrotestosterone (DHT) and GH enhanced BMP-2-induced expression of Runx2, ALP, and osteocalcin mRNA, compared with the individual treatments in C2C12 cells...
January 5, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28065236/expressions-of-inhibitors-of-dna-binding-1-and-matrix-metalloproteinase-9-in-colorectal-adenocarcinoma-tissues-and-their-correlations-with-microvessel-density
#18
Xue-Liang Wu, Jun Xue, Li-Kun Wang, Dong-Dong Yang, Ming Qu, Fei Guo, Guang-Yuan Sun, Lei Han, Rui-Min Yang
Objective To explore the expressions of inhibitors of DNA binding-1 (Id-1) and matrix metalloproteinase-9 (MMP-9) in colorectal carcinoma tissues and its correlation with microvessel density (MVD). Methods The expressions of Id-1 and MMP-9 as well as CD34-labelled MVD in colorectal adenocarcinoma tissues (n=50) and normal adjacent tissues (n=50) were examined by immunohistochemistry. Results The positive expressions of Id-1 and MMP-9 were seen in 72.00% (36/50) and 78.00%(39/50) of colorectal adenocarcinoma tissues,which were significantly higher than those [24...
December 20, 2016: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/27995128/intravenous-topiramate-pharmacokinetics-in-dogs-with-naturally-occurring-epilepsy
#19
Irene Vuu, Lisa D Coles, Patricia Maglalang, Ilo E Leppik, Greg Worrell, Daniel Crepeau, Usha Mishra, James C Cloyd, Edward E Patterson
RATIONALE: Barriers to developing treatments for human status epilepticus include the inadequacy of experimental animal models. In contrast, naturally occurring canine epilepsy is similar to the human condition and can serve as a platform to translate research from rodents to humans. The objectives of this study were to characterize the pharmacokinetics of an intravenous (IV) dose of topiramate (TPM) in dogs with epilepsy and evaluate its effect on intracranial electroencephalographic (iEEG) features...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/27908498/hydrophilic-interaction-and-reversed-phase-mixed-mode-liquid-chromatography-coupled-to-high-resolution-tandem-mass-spectrometry-for-polar-lipids-analysis
#20
Sara Granafei, Pietro Azzone, Vito Alessandro Spinelli, Ilario Losito, Francesco Palmisano, Tommaso R I Cataldi
A hydrophilic interaction liquid chromatography (HILIC) fused-core column (150×2.1mm ID, 2.7μm particle size) and a short reversed-phase liquid chromatography (RPLC) column (20mm×2.1mm ID, 1.9μm) were serially coupled to perform mixed-mode chromatography (MMC) on complex mixtures of phospholipids (PL). Mobile phase composition and gradient elution program were, preliminarily, optimized using a mixture of phosphatidylcholines (PC), phosphatidylethanolamines (PE), their corresponding lyso-forms (LPC and LPE), and sphingomyelins (SM)...
December 16, 2016: Journal of Chromatography. A
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