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https://www.readbyqxmd.com/read/28231318/effects-of-na-channel-blockers-on-the-restitution-of-refractory-period-conduction-time-and-excitation-wavelength-in-perfused-guinea-pig-heart
#1
Oleg E Osadchii
Na+ channel blockers flecainide and quinidine can increase propensity to ventricular tachyarrhythmia, whereas lidocaine and mexiletine are recognized as safe antiarrhythmics. Clinically, ventricular fibrillation is often precipitated by transient tachycardia that reduces action potential duration, suggesting that a critical shortening of the excitation wavelength (EW) may contribute to the arrhythmic substrate. This study examined whether different INa blockers can produce contrasting effects on the rate adaptation of the EW, which would explain the difference in their safety profile...
2017: PloS One
https://www.readbyqxmd.com/read/28231291/osteosarcoma-cell-proliferation-and-survival-requires-mglur5-receptor-activity-and-is-blocked-by-riluzole
#2
Sally Liao, Yuleisy Ruiz, Hira Gulzar, Zarina Yelskaya, Lyes Ait Taouit, Murielle Houssou, Trisha Jaikaran, Yuriy Schvarts, Kristina Kozlitina, Upal Basu-Roy, Alka Mansukhani, Shahana S Mahajan
Osteosarcomas are malignant tumors of bone, most commonly seen in children and adolescents. Despite advances in modern medicine, the poor survival rate of metastatic osteosarcoma has not improved in two decades. In the present study we have investigated the effect of Riluzole on a human and mouse metastatic osteosarcoma cells. We show that LM7 cells secrete glutamate in the media and that mGluR5 receptors are required for the proliferation of LM7 cells. Riluzole, which is known to inhibit glutamate release, inhibits proliferation, induces apoptosis and prevents migration of LM7 cells...
2017: PloS One
https://www.readbyqxmd.com/read/28230858/ngs-based-transcriptome-profiling-reveals-biomarkers-for-companion-diagnostics-of-the-tgf-%C3%AE-receptor-blocker-galunisertib-in-hcc
#3
Yuan Cao, Rahul Agarwal, Francesco Dituri, Luigi Lupo, Paolo Trerotoli, Serena Mancarella, Peter Winter, Gianluigi Giannelli
Transforming growth factor-beta (TGF-β) signaling has gained extensive interest in hepatocellular carcinoma (HCC). The small molecule kinase inhibitor galunisertib, targeting the TGF-β receptor I (TGF-βRI), blocks HCC progression in preclinical models and shows promising effects in ongoing clinical trials. As the drug is not similarly effective in all patients, this study was aimed at identifying new companion diagnostics biomarkers for patient stratification. Next-generation sequencing-based massive analysis of cDNA ends was used to investigate the transcriptome of an invasive HCC cell line responses to TGF-β1 and galunisertib...
February 23, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28230651/hypoxia-induces-internalization-of-%C3%AE%C2%BA-opioid-receptor
#4
Chunhua Xi, Xuan Liang, Chunhua Chen, Hasan Babazada, Tianzuo Li, Renyu Liu
BACKGROUND: It has been demonstrated that κ-opioid receptor agonists can reduce hypoxia-ischemia brain injury in animal models. However, it is unclear how the κ-opioid receptor responds to hypoxia-ischemia. In the current study, the authors used an in vitro model of oxygen-glucose deprivation and reoxygenation to explore how κ-opioid receptors respond to hypoxia and reoxygenation. METHODS: Mouse neuroblastoma Neuro2A cells were stably transfected with mouse κ-opioid receptor-tdTomato fusion protein or Flag-tagged mouse κ-opioid receptor, divided into several groups (n = 6 to 12), and used to investigate the κ-opioid receptor movement...
February 23, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28230330/comparing-six-antihypertensive-medication-classes-for-preventing-new-onset-diabetes-mellitus-among-hypertensive-patients-a-network-meta-analysis
#5
Yang Yang, Huilan Xu
Hypertensive patients usually have a higher risk of new-onset diabetes mellitus (NOD) which may trigger cardiovascular diseases. In this study, the effectiveness of six antihypertensive agents with respect to NOD prevention in hypertensive patients was assessed. A network meta-analysis was conducted to compare the efficacy of specific drug classes. PubMed and Embase databases were searched for relevant articles. Results of the pairwised meta-analysis were illustrated by odd ratios (OR) and a corresponding 95% confidence interval (CI)...
February 23, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28230199/activation-of-angiotensin-ii-type-1-receptors-increases-d4-dopamine-receptor-expression-in-rat-renal-proximal-tubule-cells
#6
Luxun Tang, Shuo Zheng, Hongmei Ren, Duofen He, Chunyu Zeng, Wei Eric Wang
Both the dopaminergic and renin-angiotensin systems play important roles in the regulation of blood pressure. Our previous study showed that the stimulation of dopaminergic D4 receptors reduced angiotensin II type 1 (AT1) receptor expression in renal proximal tubule (RPT) cells. In this study, we tested whether AT1 receptors, in return, would regulate D4 receptor expression and function in RPT cells. Expression of the D4 receptor from Wistar-Kyoto (WKY) or spontaneously hypertensive rats (SHRs) RPT cells and renal cortex tissues were determined by western blot, and Na(+)-K(+) ATPase activity was determined using an enzyme assay...
February 23, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28230089/endothelin-receptor-specific-control-of-endoplasmic-reticulum-stress-and-apoptosis-in-the-kidney
#7
Carmen De Miguel, William C Hamrick, Janet L Hobbs, David M Pollock, Pamela K Carmines, Jennifer S Pollock
Endothelin-1 (ET-1) promotes renal damage during cardiovascular disease; yet, the molecular mechanisms involved remain unknown. Endoplasmic reticulum (ER) stress, triggered by unfolded protein accumulation in the ER, contributes to apoptosis and organ injury. These studies aimed to determine whether the ET-1 system promotes renal ER stress development in response to tunicamycin. ETB deficient (ETB def) or transgenic control (TG-con) rats were used in the presence or absence of ETA receptor antagonism. Tunicamycin treatment similarly increased cortical ER stress markers in both rat genotypes; however, only ETB def rats showed a 14-24 fold increase from baseline for medullary GRP78, sXBP-1, and CHOP...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229818/relationship-between-calcium-channel-blockers-and-skin-fibrosis-in-patients-with-systemic-sclerosis
#8
Guowei Li, Jonathan D Adachi, Ji Cheng, Lehana Thabane, Marie Hudson, Marvin J Fritzler, Steven Lorenzi, Murray Baron, Maggie Larché
OBJECTIVES: Recent experimental evidence suggests that calcium channel blockers (CCBs) may have anti-fibrotic effects on liver and pulmonary fibrosis. We aimed to investigate whether use of CCBs was associated with the skin fibrosis in patients with systemic sclerosis (SSc). METHODS: Based on the 5-year follow-up data from the Canadian Scleroderma Research Group registry, we used the generalised estimating equations (GEE) model to assess the relationship between use of CCBs and the primary outcome of skin fibrosis measured by the modified Rodnan skin score (mRSS)...
January 31, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28229620/successful-infliximab-therapy-in-a-patient-with-comorbid-spondyloarthritis-primary-biliary-cirrhosis-and-generalized-morphea
#9
Hatice Resorlu, Sevilay Kılıc, Selda Isık, Ferhat Gokmen
The patient in this report was diagnosed simultaneously with primary biliary cirrhosis (PBC), spondyloarthritis, and generalized morphea and was started on infliximab therapy. In addition to an improvement in clinical symptoms with this therapy, an improvement was also observed in laboratory parameters such as cholestatic enzymes, C-reactive protein, and erythrocyte sedimentation rate. Infliximab was well tolerated in this 56-year-old patient. However, further studies must be performed in order to clarify the therapeutic role of TNF-α blockers in, PBC and generalized morphea...
February 23, 2017: Acta Clinica Belgica
https://www.readbyqxmd.com/read/28229302/tremor-analysis-separates-parkinson-s-disease-and-dopamine-receptor-blockers-induced-parkinsonism
#10
Aasef G Shaikh
Parkinson's disease, the most common cause of parkinsonism is often difficult to distinguish from its second most common etiology due to exposure to dopamine receptor blocking agents such as antiemetics and neuroleptics. Dual axis accelerometry was used to quantify tremor in 158 patients with parkinsonism; 62 had Parkinson's disease and 96 were clinically diagnosed with dopamine receptor blocking agent-induced parkinsonism. Tremor was measured while subjects rested arms (resting tremor), outstretched arms in front (postural tremor), and reached a target (kinetic tremor)...
February 22, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28229253/the-biology-of-uveal-melanoma
#11
Adriana Amaro, Rosaria Gangemi, Francesca Piaggio, Giovanna Angelini, Gaia Barisione, Silvano Ferrini, Ulrich Pfeffer
Uveal melanoma (UM), a rare cancer of the eye, is distinct from cutaneous melanoma by its etiology, the mutation frequency and profile, and its clinical behavior including resistance to targeted therapy and immune checkpoint blockers. Primary disease is efficiently controlled by surgery or radiation therapy, but about half of UMs develop distant metastasis mostly to the liver. Survival of patients with metastasis is below 1 year and has not improved in decades. Recent years have brought a deep understanding of UM biology characterized by initiating mutations in the G proteins GNAQ and GNA11...
February 22, 2017: Cancer Metastasis Reviews
https://www.readbyqxmd.com/read/28228970/comparison-of-endothelial-function-improvement-estimated-with-reactive-hyperemia-index-between-ramipril-and-telmisartan-in-hypertensive-patients
#12
You-Jeong Ki, Jae-Bin Seo, Hack-Lyoung Kim, Woo-Hyun Lim, Hye Yeon Seo, Jin Yong Lee, Woo-Young Chung
BACKGROUND: Endothelium has a function to regulate vascular tone by releasing mediators either vasodilating or vasoconstricting blood vessels. Endothelial dysfunction can be measured conveniently by Reactive Hyperemia Index (RHI) with a peripheral arterial tonometry. Angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II (AT II) receptor blockers (ARBs) are considered to have beneficial effects on endothelium through inhibition of AT II. This study was performed to compare the effect of ACEIs or ARBs on endothelial function estimated by RHI in hypertensive patients...
2017: Clinical Hypertension
https://www.readbyqxmd.com/read/28228847/c-peptide-is-independent-associated-with-diabetic-peripheral-neuropathy-a-community-based-study
#13
Xiaona Qiao, Hangping Zheng, Shuo Zhang, Siying Liu, Qian Xiong, Fei Mao, Zhaoyun Zhang, Jie Wen, Hongying Ye, Yiming Li, Bin Lu
BACKGROUND: Because the relationship between C-peptide and diabetic peripheral neuropathy (DPN) is controversial, the aim of our study was to evaluate the relationship between C-peptide and DPN in community-based Chinese patients with type 2 diabetes. METHODS: In total, 220 consecutive type 2 diabetic patients treated by our regional medical consortium were enrolled. DPN was assessed by clinical symptoms, signs, and electromyography. RESULTS: Fasting C-peptide, 2-h postprandial C-peptide and ΔC-peptide (i...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28228662/risk-of-gynecomastia-and-breast-cancer-associated-with-the-use-of-5-alpha-reductase-inhibitors-for-benign-prostatic-hyperplasia
#14
Katrina Wilcox Hagberg, Hozefa A Divan, Shona C Fang, J Curtis Nickel, Susan S Jick
BACKGROUND: Clinical trial results suggest that 5-alpha reductase inhibitors (5ARIs) for the treatment of benign prostatic hyperplasia (BPH) may increase the risk of gynecomastia and male breast cancer, but epidemiological studies have been limited. PATIENTS AND METHODS: We conducted a cohort study with nested case-control analyses using the UK Clinical Practice Research Datalink. We identified men diagnosed with BPH who were free from Klinefelter syndrome, prostate, genital or urinary cancer, prostatectomy or orchiectomy, or evidence of gynecomastia or breast cancer...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28228636/progressive-ischemic-stroke-due-to-thyroid-storm-associated-cerebral-venous-thrombosis
#15
Natsumi Tanabe, Eiji Hiraoka, Masataka Hoshino, Gautam A Deshpande, Kana Sawada, Yasuhiro Norisue, Jumpei Tsukuda, Toshihiko Suzuki
BACKGROUND Cerebral venous thrombosis (CVT) is a rare but fatal complication of hyperthyroidism that is induced by the hypercoagulable state of thyrotoxicosis. Although it is frequently difficult to diagnose CVT promptly, it is important to consider it in the differential diagnosis when a hyperthyroid patient presents with atypical neurologic symptoms. CASE REPORT A 49-year-old Japanese female with unremarkable medical history came in with thyroid storm and multiple progressive ischemic stroke identified at another hospital...
February 23, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28228338/extra-and-intracellular-calcium-signaling-pathway-s-differentially-regulate-histamine-induced-myometrial-contractions-during-early-and-mid-pregnancy-stages-in-buffaloes-bubalus-bubalis
#16
Abhishek Sharma, Udayraj P Nakade, Soumen Choudhury, Rajkumar Singh Yadav, Satish Kumar Garg
This study examines the differential role of calcium signaling pathway(s) in histamine-induced uterotonic action during early and mid-pregnancy stages in buffaloes. Compared to mid pregnancy, tonic contraction, amplitude and mean-integral tension were significantly increased by histamine to produce myometrial contraction during early pregnancy with small effects on phasic contraction and frequency. Although uterotonic action of histamine during both stages of pregnancy is sensitive to nifedipine (a L-type Ca(2+) channels blocker) and NNC55-0396 (T-type Ca(2+) channels blocker), the role of extracellular calcium seems to be more significant during mid-pregnancy as in this stage histamine produced only 9...
February 7, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28228305/clinical-presentation-management-and-outcomes-in-the-indian-heart-rhythm-society-atrial-fibrillation-ihrs-af-registry
#17
A Vora, A Kapoor, M Nair, Y Lokhandwala, C Narsimhan, A G Ravikishore, S K Dwivedi, N Namboodiri, R Hygriv, A Saxena, A Nabar, S Garg, N Bardoloi, R Yadav, A Nambiar, U Pandurangi, D Jhala, A Naik, Nagmallesh, S Rajagopal, R Selvaraj, V Arora, A Thachil, J Thomas, G Panicker
AIM: A national atrial fibrillation (AF) registry was conducted under the aegis of the Indian Heart Rhythm Society (IHRS), to capture epidemiological data-type of AF, clinical presentation and comorbidities, current treatment practices, and 1-year follow-up outcomes. METHODS: A total of 1537 patients were enrolled from 24 sites in India in the IHRS-AF registry from July 2011 to August 2012. Their baseline characteristics and follow-up data were recorded in case report forms and subsequently analyzed...
January 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28226256/endocrine-and-cellular-stress-effects-of-zinc-oxide-nanoparticles-and-nifedipine-in-marsh-frogs-pelophylax-ridibundus
#18
Halina Falfushynska, Lesya Gnatyshyna, Oksana Horyn, Inna Sokolova, Oksana Stoliar
Freshwater organisms including amphibians experience increasing exposures to emerging pollutants such as nanoparticles and pharmaceuticals, which can affect their fitness and performance. We studied the effects of two common pollutants extensively used in industry, pharmaceutical and personal care products, nano-zinc oxide (nZnO) and a Ca-channel blocker nifedipine (Nfd), on endocrine status and cellular stress markers of the marsh frog Pelophylax ridibundus. Males were exposed for 14days to nZnO (3.1μM), Zn(2+) (3...
February 8, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28224974/differences-in-outcomes-in-patients-with-stable-coronary-artery-disease-managed-by-cardiologists-versus-non-cardiologists-the-international-prospective-clarify-registry
#19
Zofia Parma, Philippe Gabriel Steg, Nicola Greenlaw, Roberto Ferrari, Ian Ford, Kim Fox, Jean-Claude Tardif, Joao Morais, Marco Alcocer Gamba, Stefan Kääb, Michał Tendera
INTRODUCTION    Clinical outcomes of patients with stable coronary artery disease (SCAD) may differ between those primarily managed by cardiologists versus non-cardiologists.  OBJECTIVES    Our main objective was to analyze the clinical outcomes of outpatients with SCAD in relation to the specialty of the managing physicians.  PATIENTS AND METHODS    We studied 32,468 outpatients with SCAD included in the CLARIFY registry, with up to 4 years follow-up data. Cardiologists provided medical care in 84...
January 20, 2017: Polskie Archiwum Medycyny Wewnętrznej
https://www.readbyqxmd.com/read/28224924/left-bundle-branch-block-in-patients-with-acute-myocardial-infarction-presentation-treatment-and-trends-in-outcome-from-1997-to-2016-in-routine-clinical-practice
#20
Paul Erne, Juan F Iglesias, Philip Urban, Franz R Eberli, Hans Rickli, René Simon, Thomas A Fischer, Dragana Radovanovic
BACKGROUND: Whether patients with acute myocardial infarction presenting with new or presumed new left bundle-branch block (LBBB) should be treated in the same way as those presenting with ST-elevation (STE) is still a matter of debate. METHODS: Data from 28,358 patients enrolled in AMIS Plus from 1997 to 2016 were analyzed to evaluate differences in treatment and outcome of patients presenting with LBBB (n=2295) or STE (n=26,090) on their initial electrocardiogram using descriptive statistics and multivariate logistic regression...
February 2017: American Heart Journal
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