Abstract:
:Initiation and maintenance of atrial fibrillation (AF) is often associated with pharmacologically or pathologically induced bradycardic states. Even drugs specifically developed in order to counteract cardiac arrhythmias often combine their action with bradycardia and, in turn, with development of AF, via still largely unknown mechanisms. This study aims to simulate action potential (AP) conduction between sinoatrial node (SAN) and atrial cells, either arranged in cell pairs or in a one-dimensional strand, where the relative amount of SAN membrane is made varying, in turn, with junctional resistance. The source-sink relationship between the two membrane types is studied in control conditions and under different simulated chronotropic interventions, in order to define a safety factor for pacemaker-to-atrial AP conduction (SASF) for each treatment. Whereas antiarrhythmic-like interventions which involve downregulation of calcium channels or of calcium handling decrease SASF, the simulation of Ivabradine administration does so to a lesser extent. Particularly interesting is the increase of SASF observed when downregulation G Kr, which simulates the administration of class III antiarrhythmic agents and is likely sustained by an increase in I CaL. Also, the increase in SASF is accompanied by a decreased conduction delay and a better entrainment of repolarization, which is significant to anti-AF strategies.
journal_name
Biomed Res Intjournal_title
BioMed research internationalauthors
Cacciani F,Zaniboni Mdoi
10.1155/2015/496418subject
Has Abstractpub_date
2015-01-01 00:00:00pages
496418eissn
2314-6133issn
2314-6141journal_volume
2015pub_type
杂志文章abstract::Here we wanted to investigate predictive value of neutrophil/lymphocyte ratio (NLR) and platelet/lymphocyte ratio (PLR) in the diagnosis of brucellosis. Thirty-two brucellosis patients diagnosed with positive serum agglutination test and thirty-two randomized healthy subjects were enrolled in this study retrospectivel...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/210502
更新日期:2015-01-01 00:00:00
abstract::[This corrects the article DOI: 10.1155/2013/783690.]. ...
journal_title:BioMed research international
pub_type: 已发布勘误
doi:10.1155/2016/8693826
更新日期:2016-01-01 00:00:00
abstract::Heart rate variability is a physiological feature indicating the influence of the autonomic nervous system on the heart rate. Association of the reduced heart rate variability due to myocardial infarction and the increased postinfarction mortality was first described more than thirty years ago. Many studies have unequ...
journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2015/680515
更新日期:2015-01-01 00:00:00
abstract:Aim:To investigate the effect of fecal microbiota transplantation on visceral hypersensitivity compared with Bifidobacterium longum. Methods:Mice visceral hypersensitivity was induced by Trichinella spiralis. After 8 weeks, they were divided into three groups (controls, Bifidobacterium longum, and fecal microbiota tra...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2018/3860743
更新日期:2018-01-30 00:00:00
abstract::Spontaneous bacterial peritonitis (SBP) is a common cirrhotic ascites complication which exacerbates the patient's condition. SBP is caused by gram-negative bacilli and, to a lesser extent, gram-positive cocci. Hospital-acquired infections show higher levels of drug-resistant bacteria. Geographical location influences...
journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2020/3743962
更新日期:2020-07-06 00:00:00
abstract:Purpose:We aimed to identify prognostic factors for survival and recurrence of hepatocellular carcinoma (HCC) after liver transplantation (LT) for patients with HCC and hepatitis C virus-related cirrhosis (HCV-cirrhosis). Methods:This retrospective cohort study followed all adult patients with HCV-cirrhosis who underw...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/1487593
更新日期:2020-10-17 00:00:00
abstract::Black stain is characterized as a dark line or an incomplete coalescence of dark dots localized on the cervical third of the tooth. Over the last century, the etiology of black stain has been the subject of much debate. Most of the studies concerning this issue were conducted in pediatric population. According to the ...
journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2015/469392
更新日期:2015-01-01 00:00:00
abstract:OBJECTIVES:To investigate the effect of two foot placements (normal or posterior placement) and three arm positions (hands on the thighs, arms crossed over chest, and augmented arm position with elbow extended) on the five times sit-to-stand (FTSTS) test times of individuals with chronic stroke. DESIGN:Cross-sectional...
journal_title:BioMed research international
pub_type: 杂志文章,随机对照试验
doi:10.1155/2014/636530
更新日期:2014-01-01 00:00:00
abstract::Effects of ketamine and lidocaine on electroencephalographic (EEG) changes were evaluated in minimally anaesthetized dogs, subjected to electric stimulus. Six dogs were subjected to six treatments in a crossover design with a washout period of one week. Dogs were subjected to intravenous boluses of lidocaine 2 mg/kg, ...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/305367
更新日期:2015-01-01 00:00:00
abstract::An FDA-regulated, prescription medical food (Fosteum; 27 mg natural genistein, 200 IU cholecalciferol, 20 mg citrated zinc bisglycinate (4 mg elemental zinc) per capsule) and an over-the-counter (OTC) supplement (Citracal Plus Bone Density Builder; 27 mg synthetic genistein, 600 mg elemental calcium (calcium citrate),...
journal_title:BioMed research international
pub_type: 杂志文章,随机对照试验
doi:10.1155/2013/273498
更新日期:2013-01-01 00:00:00
abstract::Toll-like receptors (TLRs), a critical family of pattern recognition receptors (PRRs), are responsible for the innate immune responses via signalling pathways to provide effective host defence against pathogen infections. However, TLR-signalling pathways are also likely to stringently regulate tissue maintenance and h...
journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2014/945169
更新日期:2014-01-01 00:00:00
abstract::The aim of the study was to assess the prevalence of temporomandibular disorders (TMD) and oral parafunctions, as well as their correlation with psychoemotional factors in Polish university students. The research was conducted in a group of 456 students (N = 456). The examination form comprised of two parts: survey an...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/472346
更新日期:2014-01-01 00:00:00
abstract:Objective:To investigate whether preventive administration of a proton pump inhibitor (PPI) can reduce the occurrence and development of traumatic granuloma (TG) following type IV-VI cordectomy. Methods:We retrospectively analyzed the status of postoperative granulomas in 37 patients who underwent type IV-VI cordectom...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/4178376
更新日期:2020-08-10 00:00:00
abstract::With the development of nanotechnology, nanocarriers have been increasingly used for curative drug/gene delivery. Various nanocarriers are being introduced and assessed, such as polymer nanoparticles, liposomes, and micelles. As a novel theranostic system, nanocarriers hold great promise for ultrasound molecular imagi...
journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2014/963891
更新日期:2014-01-01 00:00:00
abstract::Condyloma acuminatum, intraepithelial neoplasia, and squamous cell carcinoma are three relatively frequent vulvar lesions. Condyloma acuminatum is induced by low risk genotypes of human papillomavirus (HPV). Vulvar intraepithelial neoplasia (VIN) and squamous cell carcinoma have different etiopathogenic pathways and a...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/480573
更新日期:2014-01-01 00:00:00
abstract::Targeted drug delivery using folate receptors is one of the most interesting chemotherapeutic research areas over the past few years. A novel folate targeted copolymer was synthesized using dextran stearate coupled to folic acid. FT-IR and NMR spectroscopy were used to confirm successful conjugation. Micelles prepared...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/708593
更新日期:2014-01-01 00:00:00
abstract::Abnormal metabolism is another cancer hallmark. The two most characterized altered metabolic pathways are high rates of glycolysis and glutaminolysis, which are natural targets for cancer therapy. Currently, a number of newer compounds to block glycolysis and glutaminolysis are being developed; nevertheless, lonidamin...
journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2015/690492
更新日期:2015-01-01 00:00:00
abstract::Pediatric myelodysplastic syndrome (MDS) is an uncommon disease and little is known about the molecular alterations of its development and evolution to acute myeloid leukemia (AML). The Enhancer of Zeste Homolog 2 (EZH2) is the catalytic subunit of Polycomb repressive complex 2 (PCR2). It is a histone methyltransferas...
journal_title:BioMed research international
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1155/2019/3176565
更新日期:2019-12-10 00:00:00
abstract::We aimed to determine the effects of an 8 wk Hatha yoga training on blood glucose, insulin, lipid profiles, endothelial microparticles (EMPs), and inflammatory status in healthy, lean, and female Chinese subjects. A total of 30 healthy, female Chinese subjects were recruited and randomized into control or yoga practic...
journal_title:BioMed research international
pub_type: 杂志文章,随机对照试验
doi:10.1155/2016/5387258
更新日期:2016-01-01 00:00:00
abstract::Metabolic bone disorder is usually caused by abnormalities of minerals and hormones metabolism. Recently, it has been proved by several studies that the renin-angiotensin system (RAS) in local bone tissue is directly involved in bone metabolism. Activation of skeletal RAS plays an important role in bone metabolic diso...
journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2013/932691
更新日期:2013-01-01 00:00:00
abstract:Background and Aims:The NF-κB pathway has been implicated in the genetic aetiology of psoriatic disease. However, since most patients with arthritis have psoriasis, discerning the genetic contributions to both aspects of psoriatic disease is not easy. Our aim was to study the association of common polymorphisms in gene...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2019/1030256
更新日期:2019-11-11 00:00:00
abstract::Morphine is considered a highly potent analgesic agent used to relieve suffering of patients with cancer. Several in vitro and in vivo studies showed that morphine also modulates angiogenesis and regulates tumour cell growth. Unfortunately, the results obtained by these studies are still contradictory. In order to bet...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/161508
更新日期:2015-01-01 00:00:00
abstract::Mycobacterium bovis causes classic bovine tuberculosis, a zoonosis which is still a concern in Africa. Biofilm forming ability of two Mycobacterium bovis strains was assessed on coupons of cement, ceramic, or stainless steel in three different microbiological media at 37°C with agitation for 2, 3, or 4 weeks to determ...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2014/210165
更新日期:2014-01-01 00:00:00
abstract::It is increasingly affirmed that most of the long-term consequences of TBI are due to molecular and cellular changes occurring during the acute phase of the injury and which may, afterwards, persist or progress. Understanding how to prevent secondary damage and improve outcome in trauma patients, has been always a tar...
journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2015/736104
更新日期:2015-01-01 00:00:00
abstract::The regiospecific characteristics of n-3 polyunsaturated fatty acids (PUFAs) in triacylglycerol (TAG) significantly affect the physicochemical and physiological properties of marine fish oils. In this study, the TAG molecular species composition and positional distributions of fatty acids were investigated in three ma...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2018/3529682
更新日期:2018-07-10 00:00:00
abstract::Hypoxia plays an essential role in orchestrating Epithelial-mesenchymal transition and promoting metastasis of colorectal cancer. However, the underlying mechanisms are still not well elucidated. Here, we present that hypoxic exposure causes endoplasmic reticulum stress and activates the unfolded protein response path...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2020/5958272
更新日期:2020-01-27 00:00:00
abstract::Metabolic syndrome (MetS) is a steering force for the cardiovascular diseases epidemic in Asia. This study aimed to compare the prevalence of MetS in Malaysian adults using NCEP-ATP III, IDF, and JIS definitions, identify the demographic factors associated with MetS, and determine the level of agreement between these ...
journal_title:BioMed research international
pub_type: 临床试验,杂志文章
doi:10.1155/2013/760963
更新日期:2013-01-01 00:00:00
abstract::A growing body of evidence has indicated that high-fat diet-induced nonalcoholic fatty liver disease is usually accompanied by oxidized low-density lipoprotein (ox-LDL) deposited in the liver. The current study aimed to investigate the effect of quercetin on high-fat diet-induced ox-LDL accumulation in the liver and t...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2015/607531
更新日期:2015-01-01 00:00:00
abstract::There is an emerging body of evidence that chemoresistance and minimal residual disease result from selective resistance of a cell subpopulation from the original tumor that is molecularly and phenotypically distinct. These cells are called "cancer stem cells" (CSCs). In this review, we analyze the potential targeting...
journal_title:BioMed research international
pub_type: 杂志文章,评审
doi:10.1155/2014/859871
更新日期:2014-01-01 00:00:00
abstract::MicroRNAs are small noncoding RNAs, involved in the regulation of many cellular processes in plants. Hundreds of miRNAs have been identified in cassava by various techniques, yet these identifications were constrained by a lack of miRNA templates and the narrow range of conditions in transcriptome study. In this resea...
journal_title:BioMed research international
pub_type: 杂志文章
doi:10.1155/2019/2019846
更新日期:2019-06-19 00:00:00