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Trek2a regulates gnrh3 expression under control of melatonin receptor Mt1 and α2-adrenoceptor.
Abstract Gonadotrophin-releasing hormone (GnRH) expression is associated with the two-pore domain potassium ion (K+) channel-related K+ (TREK) channel trek2a expression and melatonin levels. We aimed to investigate correlation of trek2a expression with gnrh3 expression, and regulatory mechanisms of trek2a expression by the melatonin receptor Mt1 and α2-adrenoceptor which are regulated by melatonin. trek2a specific siRNA, Mt1 antagonist luzindole and α2-adrenoceptor antagonist prazosin were administered into the adult zebrafish brain and gene expressions were examined by real-time PCR. trek2a specific siRNA admin...
Source: Biochemical and Biophysical Research communications - February 7, 2018 Category: Biochemistry Authors: Loganathan K, Moriya S, Parhar IS Tags: Biochem Biophys Res Commun Source Type: research

Interfering RNA against PKC- α Inhibits TNF-α-induced IP3R1 Expression and Improves Glomerular Filtration Rate in Rats with Fulminant Hepatic Failure.
CONCLUSION: RNAi targeting PKC-α inhibited TNF-α-induced IP3R1 overexpression, and in turn improved compromised GFR in the development of acute kidney injury during FHF in rats. PMID: 29357415 [PubMed - as supplied by publisher]
Source: American Journal of Physiology. Renal Physiology - January 10, 2018 Category: Physiology Authors: Wang DL, Dai WY, Wang W, Wen Y, Zhou Y, Zhao YT, Wu J, Liu P Tags: Am J Physiol Renal Physiol Source Type: research

Functional interaction of Junctophilin 2 with small ‐ conductance Ca2+‐activated potassium channel subtype 2(SK2) in mouse cardiac myocytes
ConclusionThe present data provide evidence that the functional interaction between JP2 and SK2 channels is present in the native mouse heart tissue. Junctophilin 2, as junctional membrane complex (JMC) protein, is an important regulator of the cardiac SK channels.
Source: Acta Physiologica - December 7, 2017 Category: Physiology Authors: H. K. Fan, T. X. Luo, W. D. Zhao, Y. H. Mu, Y. Yang, W. J. Guo, H. Y. Tu, Q. Zhang Tags: ORIGINAL ARTICLE Source Type: research

Association between connexin 40 and potassium voltage-gated channel subfamily A member 5 expression in the atrial myocytes of patients with atrial fibrillation.
Authors: Zhang F, Bian Y, Huang L, Fan W Abstract Structural and electrical remodeling within the atrium mediate the pathogenesis of atrial fibrillation (AF). Two key genes that sever a role in this remodeling are connexin 40 (Cx40) and potassium voltage-gated channel subfamily A member 5 (KCNA5), respectively. Electrical remodeling is considered to induce structural remodeling during AF. In the present study, the left atrial appendage section and atrial myocytes of patients with AF were evaluated. It was observed that Cx40 and KCNA5 mRNA (P<0.05) and protein (P<0.01) expression was significantly downregulate...
Source: Experimental and Therapeutic Medicine - December 6, 2017 Category: General Medicine Tags: Exp Ther Med Source Type: research

Functional interaction of Junctophilin 2 with small conductance Ca2+ ‐activated potassium channel subtype 2(SK2) in mouse cardiac myocytes
ConclusionsThe present data provide evidence that the functional interaction between JP2 and SK2 channels is present in the native mouse heart tissue. Junctophilin 2, as junctional membrane complex (JMC)protein, is an important regulator of the cardiac SK channels.This article is protected by copyright. All rights reserved.
Source: Acta Physiologica - October 21, 2017 Category: Physiology Authors: Hong K. Fan, Tian X. Luo, Wei D. Zhao, Yong H. Mu, Yang Yang, Wen J. Guo, Hui Y. Tu, Qian Zhang Tags: Regular Paper Source Type: research

Regulation of Chromatin Assembly and Cell Transformation by Formaldehyde Exposure in Human Cells
Conclusions: We propose that the inhibition of chromatin assembly represents a novel mechanism of cell transformation induced by the environmental and occupational chemical carcinogen FA. https://doi.org/10.1289/EHP1275 Received: 25 October 2016 Revised: 19 May 2017 Accepted: 23 May 2017 Published: 21 September 2017 Address correspondence to C. Jin, Dept. of Environmental Medicine, New York University School of Medicine, 57 Old Forge Rd., Tuxedo Park, NY 10987 USA. Telephone: (845) 731-3602. Email: Chunyuan.jin@nyumc.org *Current affiliation: Medical School of Nanjing University, Nanjing, China. †Current affiliatio...
Source: EHP Research - September 21, 2017 Category: Environmental Health Authors: Daniil Lyalko Tags: Research Source Type: research

KCa3.1 as an Effective Target for Inhibition of Growth and Progression of Intrahepatic Cholangiocarcinoma
Conclusions: Our observations suggested KCa3.1 might be a promising novel therapeutic target in intrahepatic cholangiocarcinoma.
Source: Journal of Cancer - September 12, 2017 Category: Cancer & Oncology Authors: Penghong Song, Yehui Du, Wenfeng Song, Hao Chen, Zefeng Xuan, Long Zhao, Jun Chen, Jian Chen, Danjing Guo, Cheng Jin, Yongchao Zhao, Biguang Tuo, Shusen Zheng Tags: Research Paper Source Type: research

Involvement of Ca(2+)-activated K(+) channel 3.1 in hypoxia-induced pulmonary arterial hypertension and therapeutic effects of TRAM-34 in rats.
This study examined whether TRAM-34, a highly selective blocker of calcium-activated potassium channel 3.1 (Kca3.1), can help prevent such hypertension by reducing proliferation of PASMCs. Rats were exposed to hypoxia (10% O2) for 3 weeks and treated daily with TRAM-34 intra-peritoneally from the first day of hypoxia. Animals were sacrificed and examined for vascular hypertrophy, Kca3.1 expression and downstream signaling pathways. In addition, primary cultures of rat PASMCs were exposed to hypoxia (3% O2) or normoxia (21% O2) for 24 h in the presence of TRAM-34 or siRNA against Kca3.1. Activation of cell signaling pathway...
Source: Bioscience Reports - July 5, 2017 Category: Biomedical Science Authors: Guo S, Shen Y, He G, Wang T, Xu D, Wen F Tags: Biosci Rep Source Type: research

Cutaneous inflammation regulates THIK1 expression in small C-like nociceptor dorsal root ganglion neurons
In this study we aimed to identify the currently unknown DRG subpopulations expressing THIK1, and to investigate the relationship between the channel and both inflammatory and spontaneous pain in normal rats. Using a combination of immunohistochemistry, western blotting and behavioural tests, we found that all small neurons and large groups of medium and large DRG neurons express THIK1. Myelinated and unmyelinated fibers, nerve endings in the skin and lamina I and II of the spinal cord also express the channel. THIK1 staining co-localizes with IB4-binding and trkA suggesting that the channel is expressed by nociceptors. At...
Source: Molecular and Cellular Neuroscience - July 2, 2017 Category: Neuroscience Source Type: research

URI prevents potassium dichromate-induced oxidative stress and cell death in gastric cancer cells.
In this study, we aimed to investigate the role of URI, an unconventional prefoldin RBP5 interactor, in potassium dichromate induced oxidative stress and cell death through in vitro loss-of-function studies. We have shown that knockdown of URI in human gastric cancer SGC-7901 cells by URI siRNA enhanced potassium dichromate-induced production of ROS. The level of rH2AX, a marker of DNA damage, was significantly increased, along with a reduced cell viability in URI siRNA treated cells that were also exposed to potassium dichromate. Comet assay showed that URI knockdown increased the tail moment in potassium dichromate-treat...
Source: American Journal of Translational Research - January 13, 2017 Category: Research Tags: Am J Transl Res Source Type: research

Functional role of the KCa3.1 potassium channel in synovial fibroblasts from rheumatoid arthritis patients
This article is protected by copyright. All rights reserved
Source: Journal of Cellular Physiology - December 29, 2014 Category: Cytology Authors: Kristin Friebel, Roland Schönherr, Raimund W. Kinne, Elke Kunisch Tags: Original Research Article Source Type: research

Role of ATP-sensitive potassium channels in modulating nociception in rat model of bone cancer pain.
Abstract Bone cancer pain is a major clinical problem and remains difficult to treat. ATP-sensitive potassium (KATP) channels may be involved in regulating nociceptive transmission at the spinal cord level. We determined the role of spinal KATP channels in the control of mechanical hypersensitivity in a rat model of bone cancer pain. The rat model of bone cancer pain was induced by implanting rat mammary gland carcinoma cells (Walker256) into the tibias. KATP modulators (pinacidil and glibenclamide) or the specific Kir6.2-siRNA were injected via an intrathecal catheter. The mechanical withdrawal threshold of rats ...
Source: Brain Research - January 27, 2014 Category: Neurology Authors: Xia H, Zhang D, Yang S, Wang Y, Xu L, Wu J, Ren J, Yao W, Fan L, Zhang C, Tian Y, Pan HL, Wang X Tags: Brain Res Source Type: research

Lipoxin A4-mediated KATP potassium channel activation results in cystic fibrosis airway epithelial repair
The main cause of morbidity and mortality in cystic fibrosis (CF) is progressive lung destruction as a result of persistent bacterial infection and inflammation, coupled with reduced capacity for epithelial repair. Levels of the anti-inflammatory mediator lipoxin A4 (LXA4) have been reported to be reduced in bronchoalveolar lavages of patients with CF. We investigated the ability of LXA4 to trigger epithelial repair through the initiation of proliferation and migration in non-CF (NuLi-1) and CF (CuFi-1) airway epithelia. Spontaneous repair and cell migration were significantly slower in CF epithelial cultures (CuFi-1) comp...
Source: AJP: Lung Cellular and Molecular Physiology - July 15, 2013 Category: Respiratory Medicine Authors: Buchanan, P. J., McNally, P., Harvey, B. J., Urbach, V. Tags: ARTICLES Source Type: research

i-Fect™ Delivers you siRNA Payload
Delivering siRNA to Dorsal Root Ganglia to Silence KV Receptors.Our i-Fect transfection kits continue to be used to optimize delivery in vivo and into hard to transfect cells like primary neurons. In these 2 latest expamples, researchers use i-Fect to deliver siRNA to KV Receptors in Rat DRGs. Knocking down these receptors enable the study of their role in pain modulation: John H. Winston, Sushil K. Sarna. Developmental Origins of Functional Dyspepsia-Like Gastric Hypersensitivity in Rats. Gastroenterology. Volume 144, Issue 3, March 2013, Pages 570–579.e3. dx.doi.org/10.1053/j.gastro.2012.11.001....intrathecal treatment...
Source: siRNA and DsiRNA Transfection Efficiency - March 16, 2013 Category: Neuroscience Tags: Kv9.1 Potassium Channel Subunit kv1.1 Potassium Channel Subunit Delivering siRNA to the CNS Transfection Kits KV Receptors i-Fect Dorsal root ganglia intrathecal delivery of siRNA in vivo siRNA Source Type: news

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