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Korean Journal of Physiology & Pharmacology

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https://www.readbyqxmd.com/read/28883760/retraction-notice-to-myosin-vi-contributes-to-malignant-proliferation-of-human-glioma-cells
#1
Rong Xu, Xu-Hao Fang, Ping Zhong
[This retracts the article on p. 139 in vol. 20, PMID: 26937209.].
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883759/the-advantage-of-topographic-prominence-adopted-filter-for-the-detection-of-short-latency-spikes-of-retinal-ganglion-cells
#2
Jungryul Ahn, Myoung-Hwan Choi, Kwangsoo Kim, Solomon S Senok, Dong-Il Dan Cho, Kyo-In Koo, Yongsook Goo
Electrical stimulation through retinal prosthesis elicits both short and long-latency retinal ganglion cell (RGC) spikes. Because the short-latency RGC spike is usually obscured by electrical stimulus artifact, it is very important to isolate spike from stimulus artifact. Previously, we showed that topographic prominence (TP) discriminator based algorithm is valid and useful for artifact subtraction. In this study, we compared the performance of forward backward (FB) filter only vs. TP-adopted FB filter for artifact subtraction...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883758/hydroquinone-suppresses-ifn-%C3%AE-expression-by-targeting-akt-irf3-pathway
#3
Yong Kim, Han Gyung Kim, Sang Yun Han, Deok Jeong, Woo Seok Yang, Jung-Il Kim, Ji Hye Kim, Young-Su Yi, Jae Youl Cho
Previous studies have demonstrated the role of hydroquinone (HQ), a hydroxylated benzene metabolite, in modulating various immune responses; however, its role in macrophage-mediated inflammatory responses is not fully understood. In this study, the role of HQ in inflammatory responses and the underlying molecular mechanism were explored in macrophages. HQ down-regulated the expression of interferon (IFN)-β mRNA in LPS-stimulated RAW264.7 cells without any cytotoxicity and suppressed interferon regulatory factor (IRF)-3-mediated luciferase activity induced by TIR-domain-containing adapter-inducing interferon-β (TRIF) and TANK-binding kinase 1 (TBK1)...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883757/time-dependent-proteomic-and-genomic-alterations-in-toll-like-receptor-4-activated-human-chondrocytes-increased-expression-of-lamin-a-c-and-annexins
#4
Seung Hee Ha, Hyoung Kyu Kim, Nguyen Thi Tuyet Anh, Nari Kim, Kyung Soo Ko, Byoung Doo Rhee, Jin Han
Activation of Toll-like receptor-4 (TLR-4) in articular chondrocytes increases the catabolic compartment and leads to matrix degradation during the development of osteoarthritis. In this study, we determined the proteomic and genomic alterations in human chondrocytes during lipopolysaccharide (LPS)-induced inflammation to elucidate the underlying mechanisms and consequences of TLR-4 activation. Human chondrocytes were cultured with LPS for 12, 24, and 36 h to induce TLR-4 activation. The TLR-4-induced inflammatory response was confirmed by real-time PCR analysis of increased interleukin-1 beta (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor alpha (TNF-α) expression levels...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883756/sodium-butyrate-has-context-dependent-actions-on-dipeptidyl-peptidase-4-and-other-metabolic-parameters
#5
Eun-Sol Lee, Dong-Sung Lee, Prakash Raj Pandeya, Youn-Chul Kim, Dae-Gil Kang, Ho-Sub Lee, Byung-Chul Oh, Dae Ho Lee
Sodium butyrate (SB) has various metabolic actions. However, its effect on dipeptidyl peptidase 4 (DPP-4) needs to be studied further. We aimed to evaluate the metabolic actions of SB, considering its physiologically relevant concentration. We evaluated the effect of SB on regulation of DPP-4 and its other metabolic actions, both in vitro (HepG2 cells and mouse mesangial cells) and in vivo (high fat diet [HFD]-induced obese mice). Ten-week HFD-induced obese C57BL/6J mice were subjected to SB treatment by adding SB to HFD which was maintained for an additional 16 weeks...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883755/effect-of-glucose-level-on-chemical-hypoxia-and-hydrogen-peroxide-induced-chemokine-expression-in-human-glioblastoma-cell-lines
#6
Yieun Jung, So-Hee Ahn, Sang Hui Park, Youn-Hee Choi
Glioblastoma multiforme (GBM) is the most common primary intracranial tumor in adults and has poor prognosis. The GBM-specific tumor microenvironment (TME) plays a crucial role in tumor progression, immune escape, local invasion, and metastasis of GBM. Here, we demonstrate that hypoxia, reactive oxygen species (ROS), and differential concentration of glucose influence the expression of cytokines and chemokines, such as IL-6, IL-8, and IP-10, in human glial cell lines. Treatment with cobalt chloride (CoCl2) and hydrogen peroxide (H2O2) significantly increased the expression levels of IL-6, IL-8, and IP-10 in a dose-dependent manner in CRT-MG and U251-MG astroglioma cells, but not in microglia cells...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883754/the-activation-of-%C3%AE-2-adrenergic-receptor-in-the-spinal-cord-lowers-sepsis-induced-mortality
#7
Sung-Su Kim, Soo-Hyun Park, Jae-Ryung Lee, Jun-Sub Jung, Hong-Won Suh
The effect of clonidine administered intrathecally (i.t.) on the mortality and the blood glucose level induced by sepsis was examined in mice. To produce sepsis, the mixture of D-galactosamine (GaLN; 0.6 g/10 ml)/lipopolysaccharide (LPS; 27 µg/27 µl) was treated intraperitoneally (i.p.). The i.t. pretreatment with clonidine (5 µg/5 µl) increased the blood glucose level and attenuated mortality induced by sepsis in a dose-dependent manner. The i.t. post-treatment with clonidine up to 3 h caused an elevation of the blood glucose level and protected sepsis-induced mortality, whereas clonidine post-treated at 6, 9, or 12 h did not affect...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883753/inhibition-of-anterior-cingulate-cortex-excitatory-neuronal-activity-induces-conditioned-place-preference-in-a-mouse-model-of-chronic-inflammatory-pain
#8
Sukjae Joshua Kang, Siyong Kim, Jaehyun Lee, Chuljung Kwak, Kyungmin Lee, Min Zhuo, Bong-Kiun Kaang
The anterior cingulate cortex (ACC) is known for its role in perception of nociceptive signals and the associated emotional responses. Recent optogenetic studies, involving modulation of neuronal activity in the ACC, show that the ACC can modulate mechanical hyperalgesia. In the present study, we used optogenetic techniques to selectively modulate excitatory pyramidal neurons and inhibitory interneurons in the ACC in a model of chronic inflammatory pain to assess their motivational effect in the conditioned place preference (CPP) test...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883752/rhglp-1-7-36-protects-diabetic-rats-against-cerebral-ischemia-reperfusion-injury-via-up-regulating-expression-of-nrf2-ho-1-and-increasing-the-activities-of-sod
#9
Yi Fang, Xiaofang Liu, Libo Zhao, Zhongna Wei, Daoli Jiang, Hua Shao, Yannan Zang, Jia Xu, Qian Wang, Yang Liu, Ye Peng, Xiaoxing Yin
The present study aimed to explore the neuroprotective effect and possible mechanisms of rhGLP-1 (7-36) against transient ischemia/reperfusion injuries induced by middle cerebral artery occlusion (MCAO) in type 2 diabetic rats. First, diabetic rats were established by a combination of a high-fat diet and low-dose streptozotocin (STZ) (30 mg/kg, intraperitoneally). Second, they were subjected to MCAO for 2 h, then treated with rhGLP-1 (7-36) (10, 20, 40 µg/kg i.p.) at the same time of reperfusion. In the following 3 days, they were injected with rhGLP-1 (7-36) at the same dose and route for three times each day...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883751/resveratrol-raises-in-vitro-anticancer-effects-of-paclitaxel-in-nsclc-cell-line-a549-through-cox-2-expression
#10
Fanhua Kong, Runqi Zhang, Xudong Zhao, Guanlin Zheng, Zhou Wang, Peng Wang
The aim of this study was to determine the raising anticancer effects of resveratrol (Res) on paclitaxel (PA) in non-small cell lung cancer (NSCLC) cell line A549. The 10 µg/ml of Res had no effect on human fetal lung fibroblast MRC-5 cells or on A549 cancer cells and the 5 or 10 µg/ml of PA also had no effect on MRC-5 normal cells. PA-L (5 µg/ml) and PA-H (10 µg/ml) had the growth inhibitory effects in NSCLC cell line A549, and Res increased these growth inhibitory effects. By flow cytometry experiment, after Res (5 µg/ml)+PA-H (10 µg/ml) treatment, the A549 cells showed the most apoptosic cells compared to other group treatments, and after additional treatment with Res, the apoptosic cells of both two PA concentrations were raised...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28883750/effect-of-etoricoxib-on-experimental-oxidative-testicular-ischemia-reperfusion-damage-in-rats-induced-with-torsion-detorsion
#11
Turgut Yapanoglu, Fatih Ozkaya, Ali Haydar Yilmaz, Renad Mammadov, Ferda Keskin Cimen, Erkan Hirik, Durdu Altuner
Etoricoxib features antioxidant and anti-inflammatory properties concomitantly, suggesting that it may be beneficial in testicular ischemia reperfusion (I/R) damage. Our aim is to investigate the effects of etoricoxib on testicular I/R damage induced with torsion-detorsion (TD). The etoricoxib + torsion-detorsion (ETD) groups of animals were given etoricoxib in 50 and 100 mg/kg of body weight (ETD-50 and ETD-100), while the testes torsion-detorsion (TTD) and sham operation rat group (SOG) animals were given single oral doses of distilled water as a solvent...
September 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28706459/beauvericin-a-cyclic-peptide-inhibits-inflammatory-responses-in-macrophages-by-inhibiting-the-nf-%C3%AE%C2%BAb-pathway
#12
Sulgi Yoo, Mi-Yeon Kim, Jae Youl Cho
Beauvericin (BEA), a cyclic hexadepsipeptide produced by the fungus Beauveria bassiana, is known to have anti-cancer, anti-inflammatory, and anti-microbial actions. However, how BEA suppresses macrophage-induced inflammatory responses has not been fully elucidated. In this study, we explored the anti-inflammatory properties of BEA and the underlying molecular mechanisms using lipopolysaccharide (LPS)-treated macrophage-like RAW264.7 cells. Levels of nitric oxide (NO), mRNA levels of transcription factors and the inflammatory genes inducible NO synthase (iNOS) and interleukin (IL)-1, and protein levels of activated intracellular signaling molecules were determined by Griess assay, semi-quantitative reverse transcriptase-polymerase chain reaction (RT-PCR), luciferase reporter gene assay, and immunoblotting analysis...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28706458/electrophysiological-characteristics-of-r47w-and-a298t-mutations-in-clc-1-of-myotonia-congenita-patients-and-evaluation-of-clinical-features
#13
Hyung Jin Chin, Chan Hyeong Kim, Kotdaji Ha, Jin Hong Shin, Dae-Seong Kim, Insuk So
Myotonia congenita (MC) is a genetic disease that displays impaired relaxation of skeletal muscle and muscle hypertrophy. This disease is mainly caused by mutations of CLCN1 that encodes human skeletal muscle chloride channel (CLC-1). CLC-1 is a voltage gated chloride channel that activates upon depolarizing potentials and play a major role in stabilization of resting membrane potentials in skeletal muscle. In this study, we report 4 unrelated Korean patients diagnosed with myotonia congenita and their clinical features...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28706457/relaxant-and-anti-inflammatory-effect-of-two-thalidomide-analogs-as-pde-4-inhibitors-in-pregnant-rat-uterus
#14
Víctor Manuel Muñoz-Pérez, Eduardo Fernández-Martínez, Héctor Ponce-Monter, Mario I Ortiz
The aim of this study was to evaluate the relaxant and anti-inflammatory effects of two thalidomide analogs as phosphodiesterase-4 (PDE-4) inhibitors in pregnant rat uterus. Uteri from Wistar female rats were isolated at 19 day of pregnancy. Uterine samples were used in functional studies to evaluate the inhibitory effects of the thalidomide analogs, methyl 3-(4-nitrophthalimido)-3-(3,4-dimethoxyphenyl)-propanoate (4NO2PDPMe) and methyl 3-(4-aminophthalimido)-3-(3,4-dimethoxyphenyl)-propanoate (4APDPMe), on prostaglandin-F2α (PGF2α)-induced phasic, K(+)-induced tonic, and Ca(2+)-induced contractions...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28706456/reduction-of-long-term-potentiation-at-schaffer-collateral-ca1-synapses-in-the-rat-hippocampus-at-the-acute-stage-of-vestibular-compensation
#15
Gyoung Wan Lee, Jae Hyo Kim, Min Sun Kim
Vestibular compensation is a recovery process from vestibular symptoms over time after unilateral loss of peripheral vestibular end organs. The aim of the present study was to observe time-dependent changes in long-term potentiation (LTP) at Schaffer collateral-CA1 synapses in the CA1 area of the hippocampus during vestibular compensation. The input-output (I/O) relationships of fEPSP amplitudes and LTP induced by theta burst stimulation to Schaffer's collateral commissural fibers were evaluated from the CA1 area of hippocampal slices at 1 day, 1 week, and 1 month after unilateral labyrinthectomy (UL)...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28706455/escitalopram-a-selective-serotonin-reuptake-inhibitor-inhibits-voltage-dependent-k-channels-in-coronary-arterial-smooth-muscle-cells
#16
Han Sol Kim, Hongliang Li, Hye Won Kim, Sung Eun Shin, Mi Seon Seo, Jin Ryeol An, Kwon-Soo Ha, Eun-Taek Han, Seok-Ho Hong, Il-Whan Choi, Grace Choi, Dae-Sung Lee, Won Sun Park
We investigated the inhibitory effect of escitalopram, a selective serotonin reuptake inhibitor (SSRI), on voltage-dependent K(+) (Kv) channels in freshly separated from rabbit coronary arterial smooth muscle cells. The application of escitalopram rapidly inhibited vascular Kv channels. Kv currents were progressively inhibited by an increase in the concentrations of escitalopram, suggesting that escitalopram inhibited vascular Kv currents in a concentration-dependent manner. The IC50 value and Hill coefficient for escitalopram-induced inhibition of Kv channels were 9...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28706454/participation-of-cox-1-and-cox-2-in-the-contractile-effect-of-phenylephrine-in-prepubescent-and-old-rats
#17
Gustavo Guevara-Balcazar, Israel Ramirez-Sanchez, Elvia Mera-Jimenez, Ivan Rubio-Gayosso, Maria Eugenia Aguilar-Najera, Maria C Castillo-Hernandez
Vascular reactivity can be influenced by the vascular region, animal age, and pathologies present. Prostaglandins (produced by COX-1 and COX-2) play an important role in the contractile response to phenylephrine in the abdominal aorta of young rats. Although these COXs are found in many tissues, their distribution and role in vascular reactivity are not clear. At a vascular level, they take part in the homeostasis functions involved in many physiological and pathologic processes (e.g., arterial pressure and inflammatory processes)...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28706453/mdl-12330a-potentiates-trail-induced-apoptosis-in-gastric-cancer-cells-through-chop-mediated-dr5-upregulation
#18
Sung-Chul Lim, Song Iy Han
MDL-12330A is a widely used adenylyl cyclase (AC) inhibitor that blocks AC/cAMP signaling. In this study, we demonstrated a novel antitumor activity of this drug in gastric carcinoma (GC) cell lines. In these GC cells, MDL-12330A reduced cell viability and induced cell death in a concentration-dependent manner. At a moderate concentration (~20 µM), MDL-12330A mainly induced apoptotic death whereas at concentrations greater than 20 µM, it increased non-apoptotic cell death. The induction of apoptosis was at least partially regulated by CHOP-mediated DR5 upregulation, as detected by immunoblotting and gene interference assays...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28706452/elucidation-of-the-profound-antagonism-of-contractile-action-of-phenylephrine-in-rat-aorta-effected-by-an-atypical-sympathomimetic-decongestant
#19
Eldina Rizvić, Goran Janković, Miroslav M Savić
Vasoconstrictive properties of sympathomimetic drugs are the basis of their widespread use as decongestants and possible source of adverse responses. Insufficiently substantiated practice of combining decongestants in some marketed preparations, such are those containing phenylephrine and lerimazoline, may affect the overall contractile activity, and thus their therapeutic utility. This study aimed to examine the interaction between lerimazoline and phenylephrine in isolated rat aortic rings, and also to assess the substrate of the obtained lerimazoline-induced attenuation of phenylephrine contraction...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28706451/protein-kinase-c-beta-ii-upregulates-intercellular-adhesion-molecule-1-via-mitochondrial-activation-in-cultured-endothelial-cells
#20
Hee Kyoung Joo, Yu Ran Lee, Sunga Choi, Myoung Soo Park, Gun Kang, Cuk-Seong Kim, Byeong Hwa Jeon
Activation of protein kinase C (PKC) is closely linked with endothelial dysfunction. However, the effect of PKCβII on endothelial dysfunction has not been characterized in cultured endothelial cells. Here, using adenoviral PKCβII gene transfer and pharmacological inhibitors, the role of PKCβII on endothelial dysfucntion was investigated in cultured endothelial cells. Phorbol 12-myristate 13-acetate (PMA) increased reactive oxygen species (ROS), p66shc phosphorylation, intracellular adhesion molecule-1, and monocyte adhesion, which were inhibited by PKCβi (10 nM), a selective inhibitor of PKCβII...
July 2017: Korean Journal of Physiology & Pharmacology
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