Abstract:
:The differential effects of a selective kappa- (κ-) opioid receptor agonist, U50488, were elucidated by monitoring the contraction of isolated guinea pig atrial and ventricular muscles. In electrically driven left atria, U50488 in nanomolar concentration range decreased the contractile force. Norbinaltorphimine (norBNI), a selective κ-receptor antagonist, and pertussis toxin (PTX) abolished the negative inotropic effect of U50488. In contrast, the inhibitory effect was not affected by the pretreatment of atropine or propranolol. Even though U50488 exerted a negative inotropic effect in the left atrium, it did not affect the contractile force of the right atrium and ventricles paced at 2 Hz. Similarly, the beating rate of the spontaneously beating right atrium was also unaffected by U50488. These results indicate that the activation of κ-opioid receptors can only produce negative inotropic effect in left atria via activation of PTX-sensitive G protein in guinea pigs. The absence of negative inotropic effects in right atria and ventricles suggests that there may be a greater distribution of functional κ-opioid receptors in guinea pig left atria than in right atria and ventricles, and the distribution of the receptors may be species-specific.
journal_name
Biomed Res Intjournal_title
BioMed research internationalauthors
Hung CF,Li HJ,Chang HH,Lee GA,Su MJdoi
10.1155/2015/906039subject
Has Abstractpub_date
2015-01-01 00:00:00pages
906039eissn
2314-6133issn
2314-6141journal_volume
2015pub_type
杂志文章abstract::Txndc9 (thioredoxin domain containing protein 9) has been shown to be involved in mammalian mitosis; however, its function in mammalian oocyte meiosis remains unclear. In this study, we initially found that Txndc9 is expressed during meiotic maturation of mouse oocytes and higher expression of Txndc9 mRNA and protein ...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2017/6265890
更新日期:2017-01-01 00:00:00
abstract::One of the most important tasks of a living organism is to maintain its genetic integrity with respect to stress. Endoplasmic reticulum (ER) has a crucial role in sensing cellular homeostasis by controlling metabolism, proteostasis, and several signaling processes. ER stressors can induce autophagy-dependent survival;...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/319589
更新日期:2015-01-01 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章,随机对照试验
doi:10.1155/2015/123078
更新日期:2015-01-01 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2018/4308054
更新日期:2018-10-16 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2019/8270187
更新日期:2019-10-07 00:00:00
abstract::Gastric cancer (GC) is one of the most common and fatal malignancies worldwide. MicroRNAs (miRNAs) play a critical role in tumor initiation, proliferation, and metastasis of gastric cancer. miR193b has been identified as a tumor suppressor in a variety of tumor types; however, its role in gastric cancer is yet to be d...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/2863236
更新日期:2020-05-25 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2019/2650678
更新日期:2019-02-13 00:00:00
abstract::Curcumin is a bright yellow compound found in Curcuma longa L., a member of the family Zingiberaceae. In the present study, we determined whether curcumin protects against oxidative stress in liver and brain in mice fed excessive alcohol. BALB/c mice were administered 20% alcohol (16 g/kg body weight) with or without ...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2013/242671
更新日期:2013-01-01 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2016/3281590
更新日期:2016-01-01 00:00:00
abstract::Astragalus membranaceus polysaccharide (APS) components are main ingredients of TCM and have proven efficacy to activate T cells and B cells, enhancing immunity in humans. In this study, elevated cytokine and anti-PD-1 antibody titers were found in mice after immunization with APS. Therefore, phage-display technology ...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/3415471
更新日期:2020-03-03 00:00:00
abstract::The present work reports the anticancer, antioxidant, lipo-protective, and anti-HIV activities of phytoconstituents present in P. hysterophorus leaf. Dried leaf samples were sequentially extracted with nonpolar and polar solvents. Ethanol fraction showed noticeable cytotoxic activity (81-85%) in SRB assay against MCF-...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2013/810734
更新日期:2013-01-01 00:00:00
abstract::Contrast enhanced magnetic resonance imaging (CE-MRI) has acquired a central role in the field of diagnosis and evaluation of breast cancer due to its high sensitivity; on the other hand, MRI has shown a variable specificity because of the wide overlap between the imaging features of benign and malignant lesions. Ther...
journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2018/3896946
更新日期:2018-10-21 00:00:00
abstract:OBJECTIVE:Data about endocrine and bone disease in nontransfusion-dependent thalassaemia (NTDT) is scanty. The aim of our study was to evaluate these complications in β-TI adult patients. METHODS:We studied retrospectively 70 β-TI patients with mean followup of 20 years. Data recorded included age, gender, haemoglobin...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/174581
更新日期:2014-01-01 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/3593962
更新日期:2020-12-11 00:00:00
abstract::Hydrocephalus is a common neurological condition that can have traumatic ramifications and can be lethal without treatment. Nowadays, during therapy radiologists have to spend a vast amount of time assessing the volume of cerebrospinal fluid (CSF) by manual segmentation on Computed Tomography (CT) images. Further, som...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2019/3059170
更新日期:2019-07-07 00:00:00
abstract::C-type lectins are multifunctional sugar-binding molecules expressed on dendritic cells (DCs) and macrophages that internalize antigens for processing and presentation. Macrophage galactose-type lectin 1 (MGL1) recognizes glycoconjugates expressing Lewis X structures which contain galactose residues, and it is selecti...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/615865
更新日期:2015-01-01 00:00:00
abstract::Cardiogenic shock (CS) is uncommon in patients suffering from acute myocardial infarction (AMI). Long-term outcome and adverse predictors for outcomes in AMI patients with CS receiving percutaneous coronary interventions (PCI) are unclear. A total of 482 AMI patients who received PCI were collected, including 53 CS an...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2017/8530539
更新日期:2017-01-01 00:00:00
abstract::Mitochondrial heat shock proteins, such as HSP60, are chaperones responsible for the folding, transport, and quality control of mitochondrial matrix proteins and are essential for maintaining life. Both prosurvival and proapoptotic roles have been proposed for HSP60, and HSP60 is reportedly involved in the initiation ...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/539805
更新日期:2015-01-01 00:00:00
abstract::Chronic kidney disease (CKD) is considered a public health problem, assuming epidemic proportions worldwide. In this context, the preponderance of CKD prevalence in male over age-matched female patients is of note. In the present study, we investigated the impact of the gender on the development of experimental CKD in...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2017/2159739
更新日期:2017-01-01 00:00:00
abstract:Purpose:To evaluate the relationships between objectively measured physical activity and physical fitness among preschool children. Methods:A total of 346 participants (201 boys and 145 girls) aged 3.5-5.5 years (M = 4.5 yr, SD = 0.47) from Shanghai, China, completed physical fitness assessments, including triceps ski...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2017/9314026
更新日期:2017-01-01 00:00:00
abstract::A set of optical models associated with blood cells are introduced in this paper. All of these models are made up of different parts possessing symmetries. The wrapped phase images as well as the unwrapped ones from two orthogonal directions related to some of these models are obtained by simulation technique. Because...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/917640
更新日期:2015-01-01 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2016/9597276
更新日期:2016-01-01 00:00:00
abstract:Introduction:To identify and analyze factors that influence administration, recognition, and compliance of medicine among community residents in Jilin Province, China. Methods:A survey was carried out among 2417 community residents in Jilin Province, China, to study their administration (CRA), recognition (CRR), and c...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/8730212
更新日期:2020-07-18 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/6126534
更新日期:2020-04-19 00:00:00
abstract::Lung cancer is one of the leading triggers for cancer death worldwide. In this study, the relationship of the aberrantly methylated and differentially expressed genes in lung adenocarcinoma (LUAD) with cancer prognosis was investigated, and 5 feature genes were identified eventually. Specifically, we firstly downloade...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/1807089
更新日期:2020-09-25 00:00:00
abstract::Taenia solium thioredoxin-1 gene (TsTrx-1) has a length of 771 bp with three exons and two introns. The core promoter gene presents two putative stress transcription factor binding sites, one putative TATA box, and a transcription start site (TSS). TsTrx-1 mRNA is expressed higher in larvae than in adult. This gene en...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/453469
更新日期:2015-01-01 00:00:00
abstract::External focus of attention (EFA) and internal focus of attention (IFA) represent commonly used strategies to instruct subjects during exercise. Several studies showed EFA to be more effective than IFA to improve motor performance and learning. To date the role of these strategies on motor performance during finger mo...
journal_title:BioMed research international
pub_type: 临床试验,杂志文章
doi:10.1155/2017/2946465
更新日期:2017-01-01 00:00:00
abstract:Background:Fingertips are a common site for hand injuries. The ideal substitute for fingertip pulp is tissue that matches texturally with minimal donor site morbidity. We described anatomical findings from cadaveric studies and the reliability of the palmar ulnar artery perforator (PUAP) free flap techniques for the re...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2018/2862879
更新日期:2018-05-09 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/3627071
更新日期:2020-05-06 00:00:00
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journal_title:BioMed research international
pub_type: 杂志文章,meta分析
doi:10.1155/2017/3803457
更新日期:2017-01-01 00:00:00