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https://www.readbyqxmd.com/read/28215000/angiotensin-ii-receptor-blockers-attenuate-lipopolysaccharide-induced-memory-impairment-by-modulation-of-nf-%C3%AE%C2%BAb-mediated-bdnf-creb-expression-and-apoptosis-in-spontaneously-hypertensive-rats
#1
Ruby Goel, Shahnawaz Ali Bhat, Kashif Hanif, Chandishwar Nath, Rakesh Shukla
Clinical studies demonstrated a positive correlation between hypertension and cognitive decline. Beneficial effects of angiotensin II receptor blockers on cognitive functions have also been reported earlier; however, its role in chronic neuroinflammation-induced memory impairment in the hypertensive state is not well understood. Therefore, in the present study, we investigated the effect of angiotensin II receptor blockers on memory impairment induced by lipopolysaccharide (LPS) in spontaneously hypertensive rats (SHRs)...
February 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28202572/differential-regulation-of-nmda-receptors-by-d-serine-and-glycine-in-mammalian-spinal-locomotor-networks
#2
David Acton, Gareth Brian Miles
Activation of N-methyl-D-aspartate receptors (NMDARs) requires the binding of a co-agonist, either D-serine or glycine, in addition to glutamate. Changes in occupancy of the co-agonist binding site are proposed to modulate neural networks including those controlling swimming in frog tadpoles. Here, we characterize regulation of the NMDAR co-agonist binding site in mammalian spinal locomotor networks. Blockade of NMDARs by D(-)-2-amino-5-phosphonopentanoic acid (D-APV) or 5,7-dichlorokynurenic acid reduced the frequency and amplitude of pharmacologically induced locomotor-related activity recorded from the ventral roots of spinal-cord preparations from neonatal mice...
February 15, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28197025/current-perioperative-management-of-pheochromocytomas
#3
REVIEW
Rashmi Ramachandran, Vimi Rewari
Neuroendocrine tumors which have the potential to secrete catecholamines are either associated with sympathetic adrenal (pheochromocytoma) or nonadrenal (paraganglioma) tissue. Surgical removal of these tumors is always indicated to cure and prevent cardiovascular and other organ system complications associated with catecholamine excess. Some of these tumors have malignant potential as well. The diagnosis, localization and anatomical delineation of these tumors involve measurement of catecholamines and their metabolic end products in plasma and urine, (123)I-metaiodobenzylguanidine scintigraphy, computed tomography, and/or magnetic resonance imaging...
January 2017: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/28188785/sortilin-related-receptor-1-interacts-with-amyloid-precursor-protein-and-is-activated-by-6-shogaol-leading-to-inhibition-of-the-amyloidogenic-pathway
#4
Ji-Young Na, Kibbeum Song, Ju-Woon Lee, Sokho Kim, Jungkee Kwon
Sortilin-related receptor 1 (SORL1) is a neuronal sorting protein that reduces amyloid precursor protein (APP) trafficking to secretases that generate amyloid beta (Aβ). Although 6-shogaol, a constituent of ginger, has been reported to have anti-inflammatory and anti-oxidant effects on neuronal cells, research regarding the activation of SORL1 has not yet been reported. Here, we aimed to investigate whether 6-shogaol contributes to the increases in SORL1 that are related to Alzheimer's disease (AD). To clarify the effect of 6-shogaol as a possible activator of SORL1, we used SORL1 siRNA as a blockade of SORL1 in hippocampal neuronal cells (HT22)...
February 8, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28187503/beneficial-and-harmful-effects-of-non-selective-beta-blockade-on-acute-kidney-injury-in-liver-transplant-candidates
#5
Sang Gyune Kim, Joseph J Larson, Ji Sung Lee, Therneau M Terry, W Ray Kim
Non-selective beta-blockers have played an important role in the prevention of portal hypertensive bleeding in cirrhotic patients. However, recent studies have suggested that non-selective beta-blockers may be harmful in some patients with end-stage liver disease. To evaluate the association between use of non-selective beta-blocker and the incidence of acute kidney injury (AKI). We conducted a nested case-control study in a cohort of liver transplant waitlist registrants. Each patient with AKI was matched to a control by the model for end-stage liver disease (MELD)-Na score, age, serum creatinine, and follow-up duration...
February 10, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28185035/anthracycline-chemotherapy-and-cardiotoxicity
#6
John V McGowan, Robin Chung, Angshuman Maulik, Izabela Piotrowska, J Malcolm Walker, Derek M Yellon
Anthracycline chemotherapy maintains a prominent role in treating many forms of cancer. Cardiotoxic side effects limit their dosing and improved cancer outcomes expose the cancer survivor to increased cardiovascular morbidity and mortality. The basic mechanisms of cardiotoxicity may involve direct pathways for reactive oxygen species generation and topoisomerase 2 as well as other indirect pathways. Cardioprotective treatments are few and those that have been examined include renin angiotensin system blockade, beta blockers, or the iron chelator dexrazoxane...
February 9, 2017: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/28161400/memory-b-cells-are-major-targets-for-effective-immunotherapy-in-relapsing-multiple-sclerosis
#7
REVIEW
David Baker, Monica Marta, Gareth Pryce, Gavin Giovannoni, Klaus Schmierer
Although multiple sclerosis (MS) is considered to be a CD4, Th17-mediated autoimmune disease, supportive evidence is perhaps circumstantial, often based on animal studies, and is questioned by the perceived failure of CD4-depleting antibodies to control relapsing MS. Therefore, it was interestingly to find that current MS-treatments, believed to act via T cell inhibition, including: beta-interferons, glatiramer acetate, cytostatic agents, dimethyl fumarate, fingolimod, cladribine, daclizumab, rituximab/ocrelizumab physically, or functionally in the case of natalizumab, also depleted CD19+, CD27+ memory B cells...
January 31, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28160292/preoperative-%C3%AE-blockade-and-hypertension-in-the-first-hour-of-functional-endoscopic-sinus-surgery
#8
Samuel A Schechtman, Aileen P Wertz, Amy Shanks, Aleda Thompson, Kevin Tremper, Melissa A Pynnonen, David W Healy
OBJECTIVES/HYPOTHESIS: Local anesthetic with epinephrine is commonly injected into the nasal mucosa during functional endoscopic sinus surgery (FESS). Systemic absorption of epinephrine following local injection may occur, resulting in a mild sympathetic response. This study seeks to determine whether an exaggerated sympathetic response to epinephrine is demonstrated in patients undergoing FESS treated preoperatively with established pharmacologic beta (β) adrenoceptor blockade. STUDY DESIGN: A retrospective analysis of adult patients undergoing FESS at a tertiary care university hospital...
February 3, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28144388/hepatic-structural-enhancement-and-insulin-resistance-amelioration-due-to-at1-receptor-blockade
#9
EDITORIAL
Vanessa Souza-Mello
Over the last decade, the role of renin-angiotensin system (RAS) on the development of obesity and its comorbidities has been extensively addressed. Both circulating and local RAS components are up-regulated in obesity and involved in non-alcoholic fatty liver disease onset. Pharmacological manipulations of RAS are viable strategies to tackle metabolic impairments caused by the excessive body fat mass. Renin inhibitors rescue insulin resistance, but do not have marked effects on hepatic steatosis. However, angiotensin-converting enzyme inhibitors and angiotensin receptor blockers (ARB) yield beneficial hepatic remodeling...
January 18, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28119452/microrna-375-is-induced-in-cisplatin-nephrotoxicity-to-repress-hepatocyte-nuclear-factor-1-beta
#10
Jielu Hao, Qiang Lou, Qingqing Wei, Shuqin Mei, Lin Li, Qing-Sheng Mi, Changlin Mei, Zheng Dong
Nephrotoxicity is a major adverse effect of cisplatin-mediated chemotherapy in cancer patients. The pathogenesis of cisplatin-induced nephrotoxicity remains largely unclear, making it difficult to design effective renoprotective approaches. Here, we have examined the role of microRNAs (miRNAs) in cisplatin-induced nephrotoxicity. We show that cisplatin nephrotoxicity was not affected by overall depletion of both beneficial and detrimental miRNAs from kidney proximal tubular cells in mice in which the miRNA-generating enzyme Dicer had been conditionally knocked out...
January 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28092069/treatment-of-concomitant-oab-and-bph
#11
REVIEW
Matthew C Moss, Tameem Rezan, Umar R Karaman, Alex Gomelsky
The etiology of men's lower urinary tract storage and voiding symptoms involves a contribution from both detrusor and outlet. As such, treatment of benign prostatic enlargement (BPE) ± benign prostatic obstruction (BPO) with standard alpha-adrenergic blockade and 5-alpha reductase inhibitor therapy may leave a population of men with persistent and bothersome urinary storage symptoms. An abundance of adequately powered, randomized, placebo-controlled trials indicate that the use of antimuscarinics and beta-3 adrenergic agonists, either alone or in combination with standard BPE/BPO therapy, leads to improvement in storage symptoms...
January 2017: Current Urology Reports
https://www.readbyqxmd.com/read/28075040/n-acetyl-seryl-aspartyl-lysyl-proline-mediates-the-anti-fibrotic-properties-of-captopril-in-unilateral-ureteric-obstructed-balb-c-mice
#12
Gary Cw Chan, Hao Jia Wu, Kam Wa Chan, Stella Yiu, Ailis Zou, Xiao Ru Huang, Hui Yao Lan, Kar Neng Lai, Sydney Cw Tang
BACKGROUND: Angiotensin-converting enzyme inhibitors (ACEi) are widely employed to deter the progression of chronic kidney disease (CKD). Besides controlling hypertension and reduction of intra-glomerular pressure, ACEi appear to have anti-fibrotic effects in the renal cortex. N-acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP), an endogenous tetrapeptide that is degraded by ACE, has also been shown to ameliorate the pro-fibrotic phenotype displayed in CKD in our recent study. Whether the anti-fibrotic properties of ACEi are mediated by Ac-SDKP has not been fully investigated...
January 11, 2017: Nephrology
https://www.readbyqxmd.com/read/28058556/surgical-treatment-of-malignant-pheochromocytoma-and-paraganglioma-retrospective-case-series
#13
Veljko Strajina, Benzon M Dy, David R Farley, Melanie L Richards, Travis J McKenzie, Keith C Bible, Florencia G Que, David M Nagorney, William F Young, Geoffrey B Thompson
INTRODUCTION: Pheochromocytoma and paraganglioma (PPGL) are rare neoplasms; about 10% are malignant. Literature regarding possible benefit from resection is extremely limited. METHODS: A 20 year review of all patients undergoing surgery for malignant PPGL at the Mayo Clinic Rochester Campus between 1994 and June 2014 was performed. RESULTS: We identified 34 patients undergoing surgery for malignant PPGL. Median follow up was 6 and 5 years survival was 90% (median 11 years)...
January 5, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28057444/redefining-beta-blocker-use-in-hypertension-selecting-the-right-beta-blocker-and-the-right-patient
#14
REVIEW
Samuel J Mann
Randomized controlled trials have concluded that the cardiovascular outcome of first-step treatment of hypertension with traditional vasoconstricting beta-blockers is inferior to treatment with other antihypertensive drug classes. Beta-blocker use is also associated with undesirable side effects. Consequently, some recent guidelines consider beta-blockers an inferior option for first-step treatment of hypertension. Despite this, beta-blockers are still widely prescribed, and likely overused, in the management of hypertension...
December 5, 2016: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28045241/evidence-for-and-risks-of-endovascular-treatment-of-asymptomatic-acute-type-b-aortic-dissection
#15
Rachel E Clough, Christoph A Nienaber
Acute aortic dissection is a challenging disease to manage. Type B aortic dissection has traditionally been divided temporally into acute and chronic cases but more recently this classification has been modified to include a sub-acute phase. Computed tomography is the imaging technique used most frequently in diagnosis and management. Active management of blood pressure is essential and should include beta-blockade unless contra-indicated. In-hospital outcomes are generally acceptable in patients with medically managed acute uncomplicated type B aortic dissection, with up to 90% of patients surviving to hospital discharge but by 5-years up to 50% of patients are dead with a significant proportion dying from aortic rupture...
January 3, 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28039238/effect-of-beta-blockers-on-perioperative-outcomes-in-vascular-and-endovascular-surgery-a-systematic-review-and-meta-analysis
#16
S Hajibandeh, S Hajibandeh, S A Antoniou, F Torella, G A Antoniou
BACKGROUND: To investigate the role of perioperative beta-blocker use in vascular and endovascular surgery. METHODS: We performed a systematic review in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement standards. The review protocol was registered with International Prospective Register of Systematic Reviews (registration number:CRD42016038111). We searched electronic databases to identify all randomized controlled trials and observational studies investigating outcomes of patients undergoing vascular and endovascular surgery with or without perioperative beta blockade...
January 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28032851/is-perioperative-beta-blockade-effective-and-safe-in-patients-undergoing-noncardiac-surgery
#17
Andrés Armstrong, Gabriel Rada, Fernando Altermatt
Beta-blockade in patients undergoing noncardiac surgery has been widely recommended as a way to reduce cardiovascular adverse events during the perioperative period. However, studies have shown contradictory results. Searching in Epistemonikos database, which is maintained by screening multiple databases, we identified 22 systematic reviews comprising 131 studies addressing the question of this article, including 112 randomized trials. We combined the evidence using meta-analysis and generated a summary of findings following the GRADE approach...
December 27, 2016: Medwave
https://www.readbyqxmd.com/read/28031536/use-of-non-selective-%C3%AE-blockers-is-associated-with-decreased-tumor-proliferative-indices-in-early-stage-breast-cancer
#18
Alexa Montoya, Clarissa N Amaya, Andres Belmont, Nabih Diab, Richard Trevino, Geri Villanueva, Steven Rains, Luis A Sanchez, Nabeel Badri, Salman Otoukesh, Ali Khammanivong, Danielle Liss, Sarah T Baca, Renato J Aguilera, Erin B Dickerson, Alireza Torabi, Alok K Dwivedi, Aamer Abbas, Karinn Chambers, Brad A Bryan, Zeina Nahleh
Previous studies suggest beta-adrenergic receptor (β-AR) antagonists (β-blockers) decrease breast cancer progression, tumor metastasis, and patient mortality; however the mechanism for this is unknown. Immunohistochemical analysis of normal and malignant breast tissue revealed overexpression of β1-AR and β3-AR in breast cancer. A retrospective cross-sectional study of 404 breast cancer patients was performed to determine the effect of β-blocker usage on tumor proliferation. Our analysis revealed that non-selective β-blockers, but not selective β-blockers, reduced tumor proliferation by 66% (p < 0...
January 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28019045/autonomic-modulation-for-the-treatment-of-ventricular-arrhythmias-therapeutic-use-of-percutaneous-stellate-ganglion-blocks
#19
Marat Fudim, Richard Boortz-Marx, Chetan B Patel, Albert Y Sun, Jonathan P Piccini
Ventricular tachycardia (VT), ventricular fibrillation (VF) and electrical storm are commonly encountered emergency conditions in cardiac and surgical intensive care units. In most cases, recurrent ventricular arrhythmias or electrical storm are associated with a heightened sympathetic tone. These arrhythmias can be difficult to treat and may be refractory to beta-blockade, antiarrhythmic therapy, sedation, and mechanical hemodynamic support. While monomorphic ventricular tachycardia and PVC-triggered polymorphic ventricular tachycardia may sometimes be amenable to successful ablation, some patients may be too critically ill to make such an approach feasible...
December 26, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28011945/orexin-a-modulates-ins-1e-cell-proliferation-and-insulin-secretion-via-extracellular-signal-regulated-kinase-and-transient-receptor-potential-channels
#20
M Skrzypski, N Khajavi, S Mergler, M Billert, D Szczepankiewicz, T Wojciechowicz, K W Nowak, M Z Strowski
Orexins A (OXA) and B (OXB) control energy homeostasis by regulating food intake, energy expenditure and sleep-wake cycle. Several studies showed that OXA stimulates insulin secretion and proliferation of beta cells. However, mechanisms of action are still not well understood. Here, we investigated whether ERK and transient receptor potential channels (TRPs) play a role in mediating the effect of OXA on cell growth, insulin production, and secretion using the established INS-1E cell line. Cell proliferation was measured using BrdU assay...
October 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
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