Abstract:
BACKGROUND:Activation of endothelial K+ channels and the subsequent increase in intracellular Ca2+, may be an important step in the release of relaxant factors in response to endothelium-dependent vasodilator agents. However, the type of K+ channel involved in hyperpolarization of the endothelium and the subsequent release of relaxing factors remains to be defined. MATERIAL AND METHODS:Rat aortic rings precontracted with U46619 were used to address the effects of inhibitors of K+ channels on the vasorelaxant response to acetylcholine (Ach). As responses to Ach were mediated solely by endothelium-derived NO and responses to NO derived from nitroprusside were unaffected by inhibition K+ channels, any effect of K+ channel inhibitors could be attributed to actions on endothelial K+ channels to modify NO release. RESULTS:Tetraethylammonium (TEA) and elevated K+ attenuated the relaxant effect of Ach, indicating a role for K+ channels in NO release. The Ca2+-activated K+ channel inhibitors, apamin, charybdotoxin and iberiotoxin as well as glibenclamide and BaCl2, inhibitors of ATP-sensitive K+ channels and inwardly rectifying K+ channels, respectively, did not affect the response to Ach. However, a combination of apamin and charybdotoxin, but not apamin and iberiotoxin, attenuated the vasorelaxant response to Ach. CONCLUSIONS:The results of this study indicate that NO release in response to Ach involves activation of an endothelial K+ channel that is inhibited by a combination of apamin and charybdotoxin.
journal_name
Med Sci Monitjournal_title
Medical science monitor : international medical journal of experimental and clinical researchauthors
Qiu Y,Quilley Jsubject
Has Abstractpub_date
2001-11-01 00:00:00pages
1129-36issue
6eissn
1234-1010issn
1643-3750pii
2182journal_volume
7pub_type
杂志文章abstract:BACKGROUND:Malignant lymphomas are neoplasms originating from lymphocytes, whose precursor cell or cells are generated during the multipotential differentiation of a stem cell. Extranodal localization most often involves the Waldeyer's ring, nasal cavity, maxillary sinuses, eyeballs, salivary glands, oral cavity, stoma...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2003-12-01 00:00:00
abstract::BACKGROUND Clear cell sarcoma (CCS) of soft tissue, or malignant melanoma of soft parts, is a rare disease. We aimed to identify prognostic factors linked to patient survival in CCS by analyzing demographic and clinical features using the Surveillance, Epidemiology, and End Results (SEER) database. This study aimed to...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.916705
更新日期:2019-09-15 00:00:00
abstract::Ectopic pregnancy is a rare phenomenon in mammals. The most common localization is an oviduct, ovary and abdominal cavity. Confirmation of the ectopic pregnancy is always a difficult medical problem. The diagnosis is mainly based on the patient's history and gynecological examination. This paper concerns a case report...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2000-07-01 00:00:00
abstract::BACKGROUND The purpose of our study was to determine the effects and mechanisms of honokiol on human epidermal growth factor receptor 2 (HER2)-positive gastric cancer cells by in vitro study. MATERIAL AND METHODS We measured HER2 expression in different gastric cancer cell lines by real-time quantitative polymerase ch...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.923962
更新日期:2020-08-30 00:00:00
abstract:BACKGROUND:The fungus C. albicans is among the leading agents causing death in immunocompromised patients. Most hospitals rely on conventional morphological techniques such as the germ-tube assay and the API system for correct identification. This technique is subjective and hence error prone. Recently, more and more m...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2007-05-01 00:00:00
abstract::BACKGROUND Pulmonary arterial hypertension (PAH) is characterized by a progressive increase in pulmonary circulatory resistance. Pulmonary vascular endothelial dysfunction is one of the main causes of primary PAH. Endothelial progenitor cells (EPCs) can proliferate and differentiate into vascular endothelial cells and...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.920678
更新日期:2020-04-18 00:00:00
abstract::BACKGROUND This study aimed to investigate intracoronary nicorandil treatment on the no-reflow phenomenon (NRP) during primary percutaneous coronary intervention (PCI) in patients with acute ST-segment elevation myocardial infarction (STEMI) and to compare nicorandil with sodium nitroprusside. MATERIAL AND METHODS Pati...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章,随机对照试验
doi:10.12659/MSM.906815
更新日期:2018-05-04 00:00:00
abstract::BACKGROUND Establishing a shunt-induced pulmonary arterial hypertension (PAH) model in mice would be of great scientific value, but no such models have been reported to date. Here, we established a shunt-associated PAH in mice to investigate the characteristics of pulmonary vascular remodeling, which provides a new pl...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.905654
更新日期:2018-03-19 00:00:00
abstract:BACKGROUND:Sleep deprivation contributes to the development and recurrence of ventricular arrhythmias. However, the electrophysiological changes in ventricular myocytes in sleep deprivation are still unknown. MATERIAL AND METHODS:Sleep deprivation was induced by modified multiple platform technique. Fifty rats were as...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.893414
更新日期:2015-02-19 00:00:00
abstract:BACKGROUND:To evaluate the possible long-term effect of symptoms of depression on mortality risk among patients with congestive heart failure. MATERIAL/METHODS:Proportional hazard models were used to evaluate the effect of symptoms of depression on mortality among 119 clinically stable patients with symptomatic heart ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2004-12-01 00:00:00
abstract:BACKGROUND:Recombinant human activated protein C (drotrecogin alfa [activated]--DAA) demonstrated in Phase III controlled clinical studies significant reduction of mortality in patients with severe sepsis and high risk of death. The aim of the study was to assess the therapeutic efficacy of DAA in patients included in ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2006-03-01 00:00:00
abstract::BACKGROUND We aimed to investigate the functions of long non-coding RNA (lncRNA) non-coding RNA activated by DNA damage (NORAD) in glioma and identify the potential mechanisms. MATERIAL AND METHODS The expression of NORAD and AKR1B1 in human glioma cell lines were examined using reverse transcription-quantitative poly...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.922659
更新日期:2020-07-21 00:00:00
abstract:BACKGROUND:Diabetic nephropathy is a common cause of end-stage renal disease, responsible for about 35% of renal replacement therapy cases. The susceptibility to nephropathy is due to environmental and genetic factors and varies among individuals. Mutations of the methylenetetrahydrofolate reductase (MTHFR) gene have b...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2004-02-01 00:00:00
abstract:BACKGROUND:Inflammation and pulmonary injury caused by mechanical ventilation is a complex process in which long pentraxin 3 (PTX3) is suggested to play an important role. The effect of mechanical stretch on PTX3 mRNA and protein expression in human alveolar epithelial cells (A549) was investigated. MATERIAL/METHODS:I...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2009-05-01 00:00:00
abstract::BACKGROUND Cerebral ischemia-reperfusion injury (CIRI) remains a serious health problem. Centella asiatica formulations are used to treat central nervous system disorders. In the present study, asiaticoside, an extract of the plant Centella asiatica, was investigated in CIRI in vivo and vitro. MATERIAL AND METHODS We ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.920325
更新日期:2020-02-01 00:00:00
abstract::BACKGROUND Competing risk analysis determines the probability of survival and considers competing events. This retrospective study aimed to undertake a competing risk analysis of prognosis in patients with esophageal carcinoma between 2006-2015 using data from the Surveillance, Epidemiology, and End Results (SEER) dat...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.918686
更新日期:2020-01-22 00:00:00
abstract:BACKGROUND:The catalytic contribution of four conserved histidines of human coproporphyrinogen oxidase (CPO) has been investigated using site-directed mutagenesis to change histidine (H) into alanine (A). MATERIAL/METHODS:The wild-type and mutant enzyme forms were analyzed for their ability to utilize coproporphyrinog...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2007-01-01 00:00:00
abstract:BACKGROUND:Children with hydrocephalus and increased intracranial pressure are treated with ventricular shunts. Multiple head CT is used to assess shunt malfunction and changes in ventricular size (volume). Because of the naturally high contrast of the head structures in CT imaging, a low-dose protocol for hydrocephali...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2007-05-01 00:00:00
abstract:BACKGROUND:Although intrinsic skeletal muscle abnormalities can influence exercise intolerance during heart failure (HF), the factors responsible for muscle changes have not been elucidated. In this study we evaluated the expression of myogenic regulatory factors (MRF), myosin heavy chain (MyHC) isoforms, and fiber tro...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2010-12-01 00:00:00
abstract::Non-small cell lung cancer (NSCLC) is the main histologic form of lung cancer that affects human health, but biomarkers for therapeutic diagnosis and prognosis of the disease are currently lacking. The gene expression profile GSE18842 was downloaded from the Gene Expression Omnibus database in this prospective study, ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.918620
更新日期:2019-12-05 00:00:00
abstract:BACKGROUND:With the advent of superb microsurgery techniques and advanced stabilization instruments, recent decades have seen great progress in treating nonunions secondary to traumatic fractures. However, those nonunions that are secondary to primary non-Hodgkin's lymphoma of bone and often related to irradiation stil...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章,评审
doi:10.12659/msm.882035
更新日期:2011-11-01 00:00:00
abstract::There are contradictory reports in current world literature regarding incidence of perforated peptic ulcers and male to female ratio in recent years. Old concepts of seasonal periodicity are being questioned. In our report we analyze what is changing with regard to demographical data of patients affected, incidence of...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2000-03-01 00:00:00
abstract::BACKGROUND Increasing evidence suggests that delayed diagnosis in Crohn's disease is associated with a complicated disease course. The aim of this study was to explore the association between delayed diagnosis and the timing of the first Crohn's disease-related intestinal surgery. MATERIAL AND METHODS A retrospective ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.904238
更新日期:2017-10-09 00:00:00
abstract:BACKGROUND:Antacids and gastric acid inhibitors are effective in the self-treatment of gastroesophageal reflux disease (GERD). The aim was to investigate onset of action of the antacid hydrotalcite compared with the OTC H2-receptor antagonist famotidine in patients suffering from heartburn. MATERIAL/METHODS:A total of...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章,随机对照试验
doi:
更新日期:2007-01-01 00:00:00
abstract::Alagille syndrome is a rare, autosomal, complex, dominant disorder associated with dysfunction of the liver, heart, skeleton, and eyes, as well as characteristic facial appearance. It is associated with the defect in component of the Notch signalling pathway. Here, we review the main features of Alagille syndrome with...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章,评审
doi:10.12659/MSM.890577
更新日期:2014-03-24 00:00:00
abstract::BACKGROUND Ultrasonography of the diaphragm is an under-utilized instrument in cervical spinal cord injury patients. We conducted a pilot study to first compare the difference of diaphragm thickness and the excursion between patients with cervical spinal cord injury and healthy volunteers, and second to correlate diap...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.917992
更新日期:2019-07-20 00:00:00
abstract::BACKGROUND Piwi-interacting RNA (piRNA) is the largest class of small non-coding RNA, which has also been identified in somatic tissues, and aberrant expression of piRNAs in tumor tissues may be implicated in carcinogenesis. piR-823 is increased in liver cirrhosis and hepatocellular carcinoma (HCC). However, there is n...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.914222
更新日期:2018-12-17 00:00:00
abstract:BACKGROUND:Renal failure in cirrhotic patients is a severe complication and endotoxemia might be involved. We investigated the effect of endotoxin on renal function of cirrhotic rats and the potential protective role of N-acetylcysteine (NAC). MATERIAL/METHODS:Hepatic cirrhosis was generated in a rat model by carbon t...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2002-02-01 00:00:00
abstract::BACKGROUND Acute rejection (AR) is a common complication of kidney transplantation. The transforming growth factor beta (TGF-ß) signaling pathway has been observed to be involved in several cellular functions. Our study aimed to investigate the correlations between single-nucleotide polymorphisms (SNPs) in TGF-ß-relat...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.918142
更新日期:2019-12-01 00:00:00
abstract::BACKGROUND The purpose of this study was to determine the influence of 2 different esthetic post materials on the final color of direct-composite restorations by using a digital technique under in vivo conditions. MATERIAL AND METHODS We included 22 pulpless incisor teeth treated with conventionally cemented zirconia ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.908606
更新日期:2018-06-15 00:00:00