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Ischemic heat disease

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https://www.readbyqxmd.com/read/29217439/in-patients-with-severe-peripheral-arterial-disease-revascularization-induced-improvement-in-lower-extremity-ischemia-can-be-detected-by-laser-speckle-contrast-imaging-of-the-fluctuation-in-blood-perfusion-after-local-heating
#1
Sotaro Katsui, Yoshinori Inoue, Yohei Yamamoto, Kimihiro Igari, Toshifumi Kudo, Hiroyuki Uetake
BACKGROUND: We previously reported the utility of the perfusion value fluctuation slope for detecting severe ischemia in the lower limb. Our approach was based on a thermal load test mimicking the well-known physiological reaction termed "cold-induced vasodilation," which is known to occur as a three-phase phenomenon. The slope parameter quantifies the decrease in perfusion values accompanying the relative cooling (third phase) following the transient increase in blood flow (second phase) induced by the applied thermal load...
December 4, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28991641/cardioprotection-of-stevioside-on-stunned-rat-hearts-a-mechano-energetical-study
#2
María I Ragone, Patricia Bonazzola, Germán A Colareda, María Lara Lazarte, Fiorella Bruno, Alicia E Consolini
BACKGROUND: The sweetener and hypoglycemic properties of stevioside (STV) are well known, as the main component of the plant Stevia rebaudiana. Given its extensive use in diabetic patients, it was of interest to evaluate its effects on the most frequent cardiovascular disease, the coronary insufficiency. PURPOSE: To study whether STV could be cardioprotective against ischemia-reperfusion (I/R) in a model of "stunning" in rat hearts. STUDY DESIGN: A preclinical study was performed in isolated hearts from rats in the following groups: non-treated rats whose hearts were perfused with STV 0...
November 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28982666/platelet-specific-p38%C3%AE-deficiency-improved-cardiac-function-after-myocardial-infarction-in-mice
#3
Panlai Shi, Lin Zhang, Mingliang Zhang, Wenlong Yang, Kemin Wang, Junfeng Zhang, Kinya Otsu, Gonghua Huang, Xuemei Fan, Junling Liu
OBJECTIVE: MAPKs (mitogen-activated protein kinases), especially p38, play detrimental roles in cardiac diseases and cardiac remodeling post-myocardial infarction. However, the activation and function of MAPKs in coronary thrombosis in vivo and its relationship with clinical outcomes remain poorly understood. APPROACH AND RESULTS: Here, we showed that p38α was the major isoform expressed in human and mouse platelets. Platelet-specific p38α-deficient mice presented impaired thrombosis and hemostasis but had improved cardiac function, reduced infarct size, decreased inflammatory response, and microthrombus in a left anterior descending artery ligation model...
October 5, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28969032/microrna-199a-acts-as-a-potential-suppressor-of-cardiomyocyte-autophagy-through-targeting-hspa5
#4
Liang Chen, Fei-Yu Wang, Zhen-Yu Zeng, Ling Cui, Jian Shen, Xiao-Wei Song, Pan Li, Xian-Xian Zhao, Yong-Wen Qin
Autophagy is an adaptive response to cardiomyocytes survival under stress conditions. MicroRNAs (miRNAs, miR) have been described to act as potent modulators of autophagy. To investigate whether and how miR-199a modulated autophagy in vitro, primary cardiomyocytes were treated under starvation to induce autophagy. Results showed that down-regulation of miR-199a was sufficient to activate cardiomyocytes autophagy. MiR-199a suppressed cardiomyocytes autophagy through direct inhibiting heat shock protein family A member 5 (Hspa5)...
September 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28964966/ambient-temperature-and-added-heat-wave-effects-on-hospitalizations-in-california-from-1999-to-2009
#5
Toki Sherbakov, Brian Malig, Kristen Guirguis, Alexander Gershunov, Rupa Basu
Investigators have examined how heat waves or incremental changes in temperature affect health outcomes, but few have examined both simultaneously. We utilized distributed lag nonlinear models (DLNM) to explore temperature associations and evaluate possible added heat wave effects on hospitalizations in 16 climate zones throughout California from May through October 1999-2009. We define heat waves as a period when daily mean temperatures were above the zone- and month-specific 95th percentile for at least two consecutive days...
September 28, 2017: Environmental Research
https://www.readbyqxmd.com/read/28754848/microrna-199a-acts-as-a-potential-suppressor-of-cardiomyocyte-autophagy-through-targeting-hspa5
#6
Liang Chen, Fei-Yu Wang, Zhen-Yu Zeng, Ling Cui, Jian Shen, Xiao-Wei Song, Pan Li, Xian-Xian Zhao, Yong-Wen Qin
Autophagy is an adaptive response to cardiomyocytes survival under stress conditions. MicroRNAs (miRNAs, miR) have been described to act as potent modulators of autophagy. To investigate whether and how miR-199a modulated autophagy in vitro, primary cardiomyocytes were treated under starvation to induce autophagy. Results showed that down-regulation of miR-199a was sufficient to activate cardiomyocytes autophagy. MiR-199a suppressed cardiomyocytes autophagy through direct inhibiting heat shock protein family A member 5 (Hspa5)...
July 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28696268/personalizing-risk-stratification-for-sudden-death-in-dilated-cardiomyopathy-the-past-present-and-future
#7
REVIEW
Brian P Halliday, John G F Cleland, Jeffrey J Goldberger, Sanjay K Prasad
Results from the DANISH Study (Danish Study to Assess the Efficacy of ICDs in Patients With Non-Ischemic Systolic Heat Failure on Mortality) suggest that for many patients with dilated cardiomyopathy (DCM), implantable cardioverter-defibrillators do not increase longevity. Accurate identification of patients who are more likely to die of an arrhythmia and less likely to die of other causes is required to ensure improvement in outcomes and wise use of resources. Until now, left ventricular ejection fraction has been used as a key criterion for selecting patients with DCM for an implantable cardioverter-defibrillator for primary prevention purposes...
July 11, 2017: Circulation
https://www.readbyqxmd.com/read/28667552/paying-for-the-tolls-the-high-cost-of-the-innate-immune-system-for-the-cardiac-myocyte
#8
REVIEW
Anne A Knowlton
The cardiac myocyte differs strikingly from the specialized cells of the immune system, which has two different responses to invading organisms and tissue damage. Adaptive or acquired immunity generates highly specific antibodies in response to threats and is an essential component of immunity; however, adaptive immunity can take 4-7 days to mobilize, and a more primitive response, innate immunity, fills the gap. Innate immunity is expressed in complex and in primitive life forms. Specialized receptors, Toll-like receptors (TLRs), which are widely distributed throughout different tissues recognize danger signals and rapidly respond with the release of noxious substances, such as TNFα...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28629818/corydalis-hendersonii-hemsl-protects-against-myocardial-injury-by-attenuating-inflammation-and-fibrosis-via-nf-%C3%AE%C2%BAb-and-jak2-stat3-signaling-pathways
#9
Ruifeng Bai, Xu Yin, Xiao Feng, Yuan Cao, Yan Wu, Zhixiang Zhu, Chun Li, Pengfei Tu, Xingyun Chai
ETHNOPHARMACOLOGICAL RELEVANCE: Corydalis hendersonii Hemsl. (CH) with heat clearing and detoxifying effects are well described in Tibetan folk medicine. It has been used for centuries in China largely for the treatment of high altitude polycythemia, a pathophysiological condition referred to "plethora" in Tibetan medicine, hypertension, hepatitis, edema, gastritis, and other infectious diseases. AIM OF THE STUDY: To investigate the cardioprotective effects of Corydalis hendersonii extract in an ICR mouse model of myocardial ischemic injury...
June 16, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28600978/long-term-effects-of-total-and-source-specific-particulate-air-pollution-on-incident-cardiovascular-disease-in-gothenburg-sweden
#10
Leo Stockfelt, Eva M Andersson, Peter Molnár, Lars Gidhagen, David Segersson, Annika Rosengren, Lars Barregard, Gerd Sallsten
BACKGROUND AND AIMS: Long-term exposure to air pollution increases cardiopulmonary morbidity and mortality, but it is not clear which components of air pollution are the most harmful, nor which time window of exposure is most relevant. Further studies at low exposure levels have also been called for. We analyzed two Swedish cohorts to investigate the effects of total and source-specific particulate matter (PM) on incident cardiovascular disease for different time windows of exposure. METHODS: Two cohorts initially recruited to study predictors of cardiovascular disease (the PPS cohort and the GOT-MONICA cohort) were followed from 1990 to 2011...
October 2017: Environmental Research
https://www.readbyqxmd.com/read/28462125/helicobacter-pylori-and-cardiovascular-complications-a-mechanism-based-review-on-role-of-helicobacter-pylori-in-cardiovascular-diseases
#11
REVIEW
Prasad G Jamkhande, Surendra G Gattani, Shaikh Ayesha Farhat
Heart disease comprises a wide class of cardiovascular abnormalities, including ischemic heart disease, myocardial infarction, atherosclerosis, and coronary artery disease. It is the leading cause of death all over the world. Several traditional and novel risk factors, such as infectious and noninfectious agents, have been associated with heart disease. Out of these, Helicobacter pylori has been recently introduced as an important etiological factor for heart disease. Numerous seroepidemiological findings observed H...
December 2016: Integrative medicine research
https://www.readbyqxmd.com/read/28442482/bag3-bcl-2-associated-athanogene-3-coding-variant-in-mice-determines-susceptibility-to-ischemic-limb-muscle-myopathy-by-directing-autophagy
#12
Joseph M McClung, Timothy J McCord, Terence E Ryan, Cameron A Schmidt, Tom D Green, Kevin W Southerland, Jessica L Reinardy, Sarah B Mueller, Talaignair N Venkatraman, Christopher D Lascola, Sehoon Keum, Douglas A Marchuk, Espen E Spangenburg, Ayotunde Dokun, Brian H Annex, Christopher D Kontos
BACKGROUND: Critical limb ischemia is a manifestation of peripheral artery disease that carries significant mortality and morbidity risk in humans, although its genetic determinants remain largely unknown. We previously discovered 2 overlapping quantitative trait loci in mice, Lsq-1 and Civq-1, that affected limb muscle survival and stroke volume after femoral artery or middle cerebral artery ligation, respectively. Here, we report that a Bag3 variant (Ile81Met) segregates with tissue protection from hind-limb ischemia...
July 18, 2017: Circulation
https://www.readbyqxmd.com/read/28409870/comparative-efficacy-and-safety-of-anti-platelet-agents-in-cerebral-ischemic-disease-a-network-meta-analysis
#13
Da Wa, Pa Zhu, Ziwen Long
We performed this network meta-analysis (NMA) to enhance the corresponding evidence of the relative efficacy and safety of different anti-platelet agents in cerebral ischemic disease. PubMed and EMBASE were searched systematically for relevant studies. Outcomes were compared using odds ratios (ORs) and 95% credible intervals (CrI). Each agent was ranked according to the value of surface under the cumulative ranking curve (SUCRA). Publication bias was evaluated by funnel plots while consistency between direct and indirect comparison was analyzed by node splitting and heat plots...
April 14, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28337294/hypoxic-preconditioning-of-human-cardiosphere-derived-cell-sheets-enhances-cellular-functions-via-activation-of-the-pi3k-akt-mtor-hif-1%C3%AE-pathway
#14
Yuya Tanaka, Tohru Hosoyama, Akihito Mikamo, Hiroshi Kurazumi, Arata Nishimoto, Koji Ueno, Bungo Shirasawa, Kimikazu Hamano
Cell sheet technology is a promising therapeutic strategy for the treatment of ischemic diseases such as myocardial infarction. We recently developed a novel protocol, termed "hypoxic preconditioning," capable of augmenting the therapeutic efficacy of cell sheets. Following this protocol, the pro-angiogenic and anti-fibrotic activity of cell sheets were enhanced by brief incubation of cell sheets under hypoxic culture conditions. However, the precise molecular mechanism underlying the hypoxic preconditioning of cell sheets is unclear...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28250763/molecular-chaperones-and-hypoxic-ischemic-encephalopathy
#15
REVIEW
Cong Hua, Wei-Na Ju, Hang Jin, Xin Sun, Gang Zhao
Hypoxic-ischemic encephalopathy (HIE) is a disease that occurs when the brain is subjected to hypoxia, resulting in neuronal death and neurological deficits, with a poor prognosis. The mechanisms underlying hypoxic-ischemic brain injury include excitatory amino acid release, cellular proteolysis, reactive oxygen species generation, nitric oxide synthesis, and inflammation. The molecular and cellular changes in HIE include protein misfolding, aggregation, and destruction of organelles. The apoptotic pathways activated by ischemia and hypoxia include the mitochondrial pathway, the extrinsic Fas receptor pathway, and the endoplasmic reticulum stress-induced pathway...
January 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28238433/impact-of-temperature-variation-on-mortality-an-observational-study-from-12-counties-across-hubei-province-in-china
#16
Yunquan Zhang, Chuanhua Yu, Junzhe Bao, Xudong Li
BACKGROUND: Compared with cold- and heat-related health impacts, the evidence was very limited in assessing the mortality effects of temperature variation (TV) accounting for both intra-day and inter-day changes in temperature. OBJECTIVE: We used a newly proposed composite indicator of intra-day and inter-day TV and evaluated TV-mortality associations in Hubei, China at the provincial level. METHODS: Daily mortality and meteorological data during 2009-2012 were obtained from 12 urban and rural counties across Hubei Province in China...
February 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28237309/impact-of-climate-change-on-heat-related-mortality-in-jiangsu-province-china
#17
Kai Chen, Radley M Horton, Daniel A Bader, Corey Lesk, Leiwen Jiang, Bryan Jones, Lian Zhou, Xiaodong Chen, Jun Bi, Patrick L Kinney
A warming climate is anticipated to increase the future heat-related total mortality in urban areas. However, little evidence has been reported for cause-specific mortality or nonurban areas. Here we assessed the impact of climate change on heat-related total and cause-specific mortality in both urban and rural counties of Jiangsu Province, China, in the next five decades. To address the potential uncertainty in projecting future heat-related mortality, we applied localized urban- and nonurban-specific exposure response functions, six population projections including a no population change scenario and five Shared Socioeconomic Pathways (SSPs), and 42 temperature projections from 21 global-scale general circulation models and two Representative Concentration Pathways (RCPs)...
May 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28191532/the-role-of-heat-shock-proteins-in-kidney-disease
#18
REVIEW
Shobhana Nayak Rao
Heat Shock Proteins (HSP) belong to the family of intracellular proteins that are constitutively expressed and are upregulated by various stressors including heat, oxidative and chemical stress. HSP helps in reparative processes, including the refolding of damaged proteins and the removal of irreparably damaged proteins that would initiate cellular death or apoptosis. A growing body of evidence has expanded the role of HSP and defined their role in diseases such as neurodegenerative disorders, cancer, ischemic heart disease and kidney diseases...
September 1, 2016: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/28138311/specific-networks-of-plasma-acute-phase-reactants-are-associated-with-the-severity-of-chronic-obstructive-pulmonary-disease-a-case-control-study
#19
Elena Arellano-Orden, Carmen Calero-Acuña, Juan Antonio Cordero, María Abad-Arranz, Verónica Sánchez-López, Eduardo Márquez-Martín, Francisco Ortega-Ruiz, José Luis López-Campos
Objectives. A detailed understanding of the intricate relationships between different acute phase reactants (APRs) in chronic obstructive pulmonary disease (COPD) can shed new light on its clinical course. In this case-control study, we sought to identify the interaction networks of a number of plasma APRs in COPD, with a special focus on their association with disease severity. Methods. COPD cases and healthy smoking controls (3:1 ratio) were recruited in our outpatient pulmonary clinic. Cardiopulmonary exercise testing was used to rule out the presence of ischemic heart disease...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28097803/regulation-of-mrna-following-brain-ischemia-and-reperfusion
#20
REVIEW
Donald J DeGracia
There is growing appreciation that mRNA regulation plays important roles in disease and injury. mRNA regulation and ribonomics occur in brain ischemia and reperfusion (I/R) following stroke and cardiac arrest and resuscitation. It was recognized over 40 years ago that translation arrest (TA) accompanies brain I/R and is now recognized as part of the intrinsic stress responses triggered in neurons. However, neuron death correlates to a prolonged TA in cells fated to undergo delayed neuronal death (DND). Dysfunction of mRNA regulatory processes in cells fated to DND prevents them from translating stress-induced mRNAs such as heat shock proteins...
July 2017: Wiley Interdisciplinary Reviews. RNA
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