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Clinical and Experimental Pharmacology & Physiology

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https://www.readbyqxmd.com/read/29143362/microrna-26a-inhibits-proliferation-and-tumorigenesis-via-targeting-cks2-in-laryngeal-squamous-cell-carcinoma
#1
Zhiyan Wu, Baocai Lu, Xiao Li, Wenjie Miao, Jin Li, Yongjuan Shi, Wenfa Yu
Laryngeal squamous cell carcinoma (LSCC) is one of the most common head and neck cancer, with high mortality and incidence. MicroRNA-26a (miR-26a) is involved in the development and progression of several tumors. However, the roles of miR-26a and its target CKS2 in LSCC progression are not yet clear. The mRNA and protein expression was determined using RT-PCR and Western blotting assay, respectively. Cell proliferation was detected using a Cell Counting kit-8 assay (CCK-8). Transwell assay was used to evaluate cell migration and invasion...
November 16, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29143360/identification-of-a-pyridine-derivative-inducing-senescence-in-ovarian-cancer-cell-lines-via-p21-activation
#2
Dongsheng Shang, Yanfang Wu, Ya Ding, Ziwen Lu, Yanting Shen, Feifei Zhu, Hanqing Liu, Chunyin Zhu, Zhigang Tu
Cellular senescence is a state of irreversible cell growth arrest. Increasing evidence suggests that cellular senescence contribute to tumor suppression in vivo. However, only a few anti-cancer drugs have been discovered to induce cellular senescence. Searching for new compounds which can inhibit cancer cell growth by inducing senescence is becoming one of the most attractive research fields. To test the effects of candidate compounds on cancer cell growth, cell proliferation assays, senescence associated β-galactosidase (SA-β-gal) staining, and flow cytometry assay were performed...
November 16, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29124787/reduced-tubular-degradation-of-glomerular-filtered-plasma-albumin-is-a-common-feature-in-acute-and-chronic-kidney-disease
#3
Yingjie Han, Nguyen D K Ly, Greg H Tesch, Philip Poronnik, David J Nikolic-Paterson
Tubular epithelial cells take up and degrade plasma albumin filtered by the glomerulus. Tubular damage resulting in reduced albumin uptake or degradation has been suggested as one mechanism contributing to albuminuria in kidney disease. This study investigated whether albumin uptake or degradation is altered in acute and chronic glomerular disease. Mouse models of acute glomerular injury (anti-GBM disease and LPS-induced albuminuria) and chronic disease (streptozotocin-induced diabetes and db/db mice) were examined...
November 10, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29112772/regulation-of-thyroid-sodium-iodide-symporter-in-different-stages-of-goiter-possible-involvement-of-ros
#4
L P L Matos, R Cortez-Cardoso, L C Cardoso-Weide, M L Freitas, D L S G Silva, A C F Ferreira
Na(+) /I(-) symporter (NIS) transports iodide into thyrocytes, a fundamental step for thyroid hormone biosynthesis. Our aim was to evaluate NIS regulation in different status of goitrogenesis and its underlying mechanisms. Wistar rats were treated with methimazole (MMI) for 5 and 21 days, to achieve different status of goiter. We then evaluated the effect of MMI removal for 1 day (R1d), after 5 (R1d-5d) or 21 (R1d-21d) days of MMI treatment. MMI increased thyroid weight, iodide uptake and in vitro TPO activity in a time-dependent way...
November 7, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29112771/role-of-mitochondria-and-mitochondria-targeted-agents-in-non-alcoholic-fatty-liver-disease
#5
REVIEW
Thekkuttuparambil Ananthanarayanan Ajith
Mitochondria play a pivotal role in the fatty acid oxidation and have been found to be affected early during the macrovesicular fat accumulation in the hepatocytes. The fatty infiltration is the primary cause of oxidative stress and inflammation in the non-alcoholic fatty liver disease (NAFLD), which can lead to the peroxidation of phospholipids, such as cardiolipin. Oxidative stress-induced damage to mitochondrial DNA can result in the impairment of oxidative phosphorylation and further increases the generation of reactive oxygen species...
November 7, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29112770/interactive-effects-of-morphine-and-dopamine-receptor-agonists-on-spatial-recognition-memory-in-mice
#6
Yanmei Chen, Yu Fu, Yingjie Ann, Jianhong Wang, Jichuan Zhang
Both opiates and dopamine play important roles in learning and memory. Although synergistic action between these two neurotransmitters has been found, their functional roles remain unclear. Here, low dose morphine (2.5 mg/kg) and low dose dopamine receptor agonists (apomorphine: 0.05 mg/kg; SKF38393: 0.01 mg/kg; bromocriptine: 0.05 mg/kg), which have no effects on spatial recognition memory, were injected intraperitoneally into mice 30 min before a memory test in a two-trial recognition Y-maze. The Y-maze is based on the innate tendency of rodents to explore novel environments and is therefore suitable for exploring the effects of morphine on learning and memory...
November 7, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29112769/dynamic-changes-of-the-composition-of-plasma-hdl-particles-in-patients-with-cardiac-disease-spotlight-on-sphingosine-1-phosphate-serum-amyloid-a-ratio
#7
REVIEW
Emmanuel E Egom, Haaris A Shiwani, Rebabonye B Pharithi, Rebecca Canning, Barkat Khan, Yassine El Hiani, Vincent Maher
Several epidemiological studies reported an inverse relationship between plasma high-density lipoprotein (HDL) cholesterol levels and atherosclerotic cardiovascular disease (ASCVD). However, therapeutic interventions targeted at raising HDL-cholesterol failed to improve cardiovascular outcomes, suggesting that HDL components distinct from cholesterol may account for the anti-atherothrombotic effects attributed to this lipoprotein. Sphingosine-1-phosphate (S1P) and the acute phase protein serum amyloid A (SAA) have been identified as integral constituents of HDL particles...
November 7, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29095517/jekyll-and-hyde-of-chemotherapy-treatment-method-for-patient-specific-dosing-of-chemotherapy-medications
#8
Dean Tatlow
Currently chemotherapy dosing is determined by a patient's weight, height and renal function. Dosing chemotherapy based on these parameters is generally effective, assuming all other physiological conditions are normal. In hypoalbuminemia patients a decrease in albumin often results in more severe side-effects, since this may lead to higher chemotherapy free drug levels. A new method to dose chemotherapy based on a patients albumin will maintain the same effective free drug levels as in patients with normal albumin...
November 2, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29094385/the-neuronal-and-endocrine-roles-of-rcan1-in-health-and-disease
#9
Heshan Peiris, Damien J Keating
Regulator of calcineurin 1 (RCAN1) was first discovered as a gene located on human chromosome 21, expressed in neurons and overexpressed in the brains of Down Syndrome individuals. Increased expression of RCAN1 has been linked with not only Down Syndrome-associated pathology but also an associated neurological disorder, Alzheimer's Disease, in which neuronal RCAN1 expression is also increased. RCAN1 has additionally been demonstrated to effect other cell types including endocrine cells, with links to the pathogenesis of β-cell dysfunction in type 2 diabetes...
November 1, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29047162/baicalin-protects-h9c2-cardiomyocytes-against-hypoxia-reoxygenation-induced-apoptosis-and-oxidative-stress-through-activation-of-mitochondrial-aldehyde-dehydrogenase-2
#10
Wen-Bin Jiang, Wei Zhao, Hao Chen, You-Yang Wu, Yi Wang, Guo-Sheng Fu, Xiang-Jun Yang
Baicalin, a flavonoid glycoside separated from Scutellaria baicalensis, has cardioprotection against ischemia/reperfusion (I/R) injury. Mitochondrial aldehyde dehydrogenase 2 (ALDH2) is considered as an endogenous protective mechanism against I/R injury depending on its antioxidant and antiapoptotic characteristics. Herein, the present study demonstrate whether ALDH2 contributes to the cardioprotection of baicalin against hypoxia/reoxygenation (H/R)-inudced H9c2 cardiomyocytes injury. Our results observed that H/R treatment resulted in a significant decrease in cells viability and obvious increases in caspase-3 activity and apoptosis rate in H9c2 cells, while these alterations were evidently reversed by baicalin pretreatment...
October 19, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29047147/case-control-pharmacogenetic-study-of-hcn1-hcn2-variants-and-genetic-generalized-epilepsies
#11
Shu-Zhi Wu, Hua Ye, Xiao-Guo Yang, Zhi-Li Lu, Qiang Qu, Jian Qu
Epilepsy is a common complex neurological disorder, and some forms are resistant to drug treatment. The HCN1/HCN2 genes encode hyperpolarization-activated cyclic nucleotide-gated channels, which play important roles in the electrophysiology of neurons. We investigated the association between HCN1/HCN2 variants and drug resistance or the risk of genetic generalized epilepsies (GGEs). We used matrix-assisted laser desorption/ionization time-of-flight mass spectrometry to assess nine variants of HCN1/HCN2 in 284 healthy participants and 483 GGEs (279 drug-responsive, 204 drug-resistant)...
October 19, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29044685/involvement-of-nf-%C3%AE%C2%BAb-in-the-upregulation-of-cystathionine-%C3%AE-lyase-a-hydrogen-sulfide-forming-enzyme-and-bladder-pain-accompanying-cystitis-in-mice
#12
Tomoka Ozaki, Maho Tsubota, Fumiko Sekiguchi, Atsufumi Kawabata
Hydrogen sulfide (H2 S) is generated from L-cysteine by multiple enzymes including cystathionine-γ-lyase (CSE), and promotes nociception by targeting multiple molecules such as Cav 3.2 T-type Ca(2+) channels. Bladder pain accompanying cyclophosphamide (CPA)-induced cystitis in mice has been shown to involve the functional upregulation of the CSE/H2 S/Cav 3.2 pathway. Therefore, we investigated whether NF-κB, as an upstream signal of the CSE/H2 S system, contributes to bladder pain in mice with CPA-induced cystitis...
October 17, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29044613/effect-of-androgen-deprivation-therapy-on-the-contractile-properties-of-type-i-and-type-ii-skeletal-muscle-fibres-in-men-with-non-metastatic-prostate-cancer
#13
C R Lamboley, H Xu, T L Dutka, E D Hanson, A Hayes, J A Violet, R M Murphy, G D Lamb
The contractile properties of vastus lateralis muscle fibres were examined in prostate cancer (PrCa) patients undergoing androgen deprivation therapy (ADT) and in age- and activity-matched healthy male subjects (Control). Mechanically-skinned muscle fibres were exposed to a sequence of heavily Ca(2+) -buffered solutions at progressively higher free [Ca(2+) ] to determine their force-Ca(2+) relationship. Ca(2+) -sensitivity was decreased in both type I and type II muscle fibres of ADT subjects relative to Controls (by -0...
October 17, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29044603/comorbid-masticatory-impairment-delays-recovery-from-acute-cerebral-ischemia-and-locomotor-hypoactivity-after-subarachnoid-hemorrhage-in-mice
#14
Ikuho Kojima, Tatsushi Mutoh, Kazumasu Sasaki, Yasuko Tatewaki, Yasuyuki Taki, Tatsuya Ishikawa
Tooth loss and related changes in the functionality may lead to worse outcome of stroke patients, but the link involved in this pathway remains unclear. This study aimed to determine the effect of comorbid masticatory impairment on acute cerebral ischemia and neurobehavioral outcome after experimental subarachnoid hemorrhage (SAH). Thirty C57BL/6 mice with (molar-less) or without (control) prior treatment of cutting off the upper molars (separated by at least one week), were subjected to SAH by endovascular perforation...
October 17, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29029361/the-mechanism-of-attenuation-of-epithelial-mesenchymal-transition-by-a-phosphodiesterase-5-inhibitor-via-renal-klotho-expression
#15
Seung Tae Han, Jae Seok Kim, Jun Young Lee, Min Keun Kim, Jin Sae Yoo, Byoung Geun Han, Seung Ok Choi, Jae Won Yang
OBJECTIVES: Phosphodiesterase-5 (PDE-5) inhibitors induces vasodilation in several organs by blocking cyclic GMP (guanosine monophosphate) degradation. However, the existence of alternative mechanism of action in case of an impaired nitric oxide (NO) system remains controversial. Previous studies suggested that decreased NO bioavailability may result in the down-regulation of klotho expression, but the relationship between klotho and NO remains obscure. Therefore, we investigated whether a PDE-5 inhibitor could preserve epithelial mesenchymal transition (EMT) and relationship exists between the NO and renal klotho expression...
October 13, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29027259/early-urinary-biomarkers-of-renal-tubular-damage-by-a-high-salt-intake-independent-of-blood-pressure-in-normotensive-rats
#16
Satoshi Washino, Keiko Hosohata, Denan Jin, Shinji Takai, Tomoaki Miyagawa
Dietary sodium intake has been associated with progression to chronic kidney disease (CKD) as well as hypertension. A high-salt intake causes renal damage independent of hypertension. Because traditional renal biomarkers are insensitive, it is difficult to detect renal injury induced by a high-salt intake, especially in normotensive patients. Here, we investigated whether newly developed renal biomarkers could be detected earlier than traditional biomarkers under a high-salt intake, in normotensive rats. Male Wistar Kyoto rats (WKY) received a regular (0...
October 12, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29027245/epac-induced-ryanodine-receptor-type-2-activation-inhibits-sodium-currents-in-atrial-and-ventricular-murine-cardiomyocytes
#17
Haseeb Valli, Shiraz Ahmad, Sujan Sriharan, Lydia D Dean, Andrew A Grace, Kamalan Jeevaratnam, Hugh R Matthews, Christopher L-H Huang
Acute RyR2 activation by exchange protein directly activated by cAMP (Epac) reversibly perturbs myocyte Ca(2+) homeostasis, slows myocardial action potential conduction, and exerts pro-arrhythmic effects. Loose patch-clamp studies, preserving in vivo extracellular and intracellular conditions, investigated Na(+) current in intact cardiomyocytes in murine atrial and ventricular preparations following Epac activation. Depolarising steps to varying test voltages activated typical voltage-dependent Na(+) currents...
October 12, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28994136/the-ineluctable-constraints-of-thermodynamics-in-the-aetiology-of-obesity
#18
REVIEW
Denis S Loiselle, Christopher J Barclay
We exploit the detail-independence feature of thermodynamics to examine issues related to the development of obesity. We adopt a 'global' approach consistent with focus on the First Law - namely that the metabolic energy provided by dietary foodstuffs has only three possible fates: the performance of work (be it microscopic or macroscopic), the generation of heat, or storage - primarily in the form of adipose tissue. Quantification of the energy expended, in the form of fat metabolised, during selected endurance events, reveals the inherent limitation of over-reliance on exercise as a primary agent of weight-loss...
October 10, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28981977/reduced-cbf-recovery-detected-by-longitudinal-3d-ssp-spect-analyses-predicts-outcome-of-postoperative-patients-after-subarachnoid-hemorrhage
#19
Tatsushi Mutoh, Tomoko Totsune, Shunsuke Takenaka, Yasuko Tatewaki, Manabu Nakagawa, Jose Ignacio Suarez, Yasuyuki Taki, Tatsuya Ishikawa
The aim of this study was to evaluate the impact of cerebral blood flow (CBF) recovery obtained from brain single-photon emission computed tomography (SPECT) images on postoperative outcome after aneurysmal subarachnoid hemorrhage (SAH). Twenty-nine patients who had undergone surgical clipping for ruptured anterior communicating artery aneurysms were analyzed prospectively. Routine measurements of CBF were performed using technetium-99m hexamethyl propyleneamine oxine SPECT on days 4 and 14 after SAH. Regional voxel data analyzed by three dimensional stereotactic surface projection (3D-SSP) were compared between patients and age-matched normal database (NDB)...
October 5, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28980339/prorenin-receptor-mediates-inflammation-in-renal-ischemia
#20
Syed S Quadri, Silas Culver, Helmy M Siragy
We hypothesized that PRR contributes to renal inflammation in the 2-kidney, 1-clip (2K1C) renal ischemia model. Male Sprague-Dawley rats were fed normal sodium diet. BP was obtained on day 0 and 28 after left renal artery clipping that reduced renal blood flow by 40%. Renal expression of TNF-α, COX-2, NF-κB, IL-1β, MCP-1 and collagen type I were assessed in sham and 2K1C rats with or without left renal administration of scramble or PRR shRNA. At baseline, there were no differences in BP. Compared to sham, MAP significantly increased in clipped animals (sham: 102± 1...
October 5, 2017: Clinical and Experimental Pharmacology & Physiology
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