Articles tagged with Ischemia
A new device has demonstrated its potential to preserve and improve the quality of donor livers from donation after circulatory death (DCD) for transplantation. The transportable machine perfusion Airdrive effectively maintained liver quality, reducing biliary complications and increasing graft function.
Researchers at Fred Hutchinson Cancer Center found that administering selenide intravenously after cardiac arrest significantly protects heart tissue, reducing damage by 88%. The nutrient selenium is taken up by injured tissues and reduces inflammation and oxidative stress.
A large randomized controlled trial found no significant improvements in cardiovascular death, non-fatal heart attack, stroke, or subsequent surgery in patients who received remote ischemic preconditioning before coronary artery bypass grafting. However, the study did reveal a 15% reduction in heart injury within 72 hours after surgery.
Researchers at Harvard School of Public Health identify hydrogen sulfide as a key molecule responsible for the health benefits of dietary restriction, linking it to increased lifespan and protection against tissue damage. The findings suggest that restricting specific amino acids can increase H2S production, leading to these benefits.
A new study published in the American Heart Association journal Stroke found that CT scans taken within 24 hours of a mild, non-disabling stroke can identify patterns of damage associated with different levels of risk for a subsequent stroke. The analysis revealed that patients with certain types of brain damage were at a higher risk o...
Research published in Neural Regeneration Research found that atorvastatin, a commonly used lipid-lowering drug, protects against cerebral ischemia/reperfusion injury. The study discovered that atorvastatin's anti-inflammatory and antioxidant effects contribute to its protective benefits.
Researchers at the Affiliated Hospital of Qingdao University discovered that mitochondrial proteins are associated with energy metabolism and apoptosis in aged rats. The study found potential targets for treating transient cerebral ischemia-reperfusion injury, providing a new avenue for treating stroke in the elderly.
Activation of extracellular signal-regulated kinase 1/2 was shown to protect against hippocampal neuronal injury in a rat model of diabetic cerebral ischemia. However, reduced extracellular signal-regulated kinase 1/2 decreased Ku70 activity and increased Bax expression, leading to increased lost hippocampal neurons.
The Houshiheisan compound prescription effectively suppresses abnormal amyloid precursor protein accumulation and reduces amyloid substance deposition. It maintains the stabilization of the internal environment of neurovascular units, minimizing injury to these units in the ischemic penumbra.
Researchers discovered that an enzyme called IDO plays a crucial role in regulating inflammation during reperfusion injury. By boosting stem cell efficacy, IDO reduces inflammation and cell death, leading to improved recovery rates.
Researchers investigated the role of atrogin-1 in cardiac homeostasis and found that its deficiency promotes cardiomyopathy and premature death via impaired autophagy. Additionally, endothelial HIF-2 was shown to protect kidney from hypoxia-induced damage. These findings highlight the importance of protein turnover regulation and HIF-2...
A recent study published in Neural Regeneration Research found that atorvastatin, a commonly used lipid-lowering drug, protects against cerebral ischemia/reperfusion injury through anti-inflammatory and antioxidant effects. The study, led by Dr. Qiuyun Tu and colleagues, showed that atorvastatin reduces inflammation and oxidative stres...
Polysaccharides from Angelica sinensis have been shown to protect PC12 neuronal cells from H2O2-induced cytotoxicity, reduce apoptosis and intracellular reactive oxygen species levels, and increase mitochondrial membrane potential. In a rat model of local cerebral ischemia, Angelica sinensis polysaccharides enhanced antioxidant activit...
Pretreatment with SSTF reduces infarct volume and apoptosis in hippocampal neurons, restoring neurological deficits and improving the integrity of the blood-brain barrier. SSTF increases Bcl-2 expression and decreases Bax expression, suggesting multiple pathways for neuroprotection.
Research reveals that trauma patients younger than 50 are three times more likely to suffer an ischemic stroke if they have a head or neck injury. The study found that about 11 in every 100,000 patients developed a stroke within four weeks of treatment.
Researchers have developed a new measure to prevent iatrogenic spinal cord injury during surgery. Changes in somatosensory evoked potential (SSEP) latency reflect the degree of spinal cord ischemic injury, while amplitude variations indicate late spinal cord reperfusion injury.
Researchers found that normobaric oxygen exposure improved neurological deficits and reduced infarct volume in rats with focal cerebral ischemia. The protective effect was linked to increased expression of certain genes involved in the hypoxia-inducial factor signaling pathway.
A team of researchers will conduct a four-year trial comparing traditional bypass surgery with endovascular treatment for patients with critical limb ischemia. The trial aims to provide guidance on cost-effective ways to treat this devastating disorder, which affects millions of Americans.
Therapeutic hypothermia decreases free radical production and inflammation, improving cerebral metabolism after traumatic brain injury. However, potential negative aspects of hypothermia treatment must be further studied.
Researchers found that amyloid beta-peptide worsened cognitive impairment following cerebral ischemia-reperfusion injury by inducing glycogen synthase kinase 3β and protein phosphatase 2A activity, resulting in tau protein phosphorylation. This study suggests a potential link between Alzheimer's disease and cerebral ischemia.
Researchers found that Danhong injection enhances the expression of transforming growth factor-beta 1 and GM130, maintaining neuronal Golgi morphology and structure after cerebral ischemia-reperfusion injury. This study suggests a potential neuroprotective effect of Danhong injection in treating cerebral ischemia-reperfusion injury.
Salvianolic acid B, a compound found in salvianolate, has been shown to attenuate brain tissue damage and inhibit neuronal apoptosis in cerebral ischemia-reperfusion injury models. The study suggests that salvianolate increases heat shock protein expression, which may help protect against such injuries.
Researchers found that stress-related proteins were induced by ischemia/reperfusion injury, exhibiting a protective effect on neurons. Heat shock cognate protein 70 expression was also detectable in glial cell and Schwann cell nuclei after the injury.
Researchers found significant microvascular injury in the uninjured side of the brain days after a stroke, indicating compromised blood-brain barrier integrity. This damage may lead to serious complications and is closely related to autophagy and neuronal swelling.
Researchers found that cortical type 2 cannabinoid receptor (CB2R) agonist trans-caryophyllene protected brain cells from ischemic effects. TC decreased cerebral infarct size and edema in animal models, with effects reversed by CB2R antagonist AM630.
Researchers found that oleuropein aglycone, a compound in olive oil, significantly reduces inflammation and tissue damage caused by intestinal ischemia and reperfusion injury. The study suggests potential therapeutic benefits for patients with spinal cord injuries, arthritis, and pleurisy.
A new noninvasive diagnostic test using computed tomographic angiography and computational fluid dynamics has demonstrated improved accuracy for detecting ischemia in patients with suspected or known coronary artery disease compared to CT angiography alone. The test, known as FFRCT, showed high sensitivity and negative predictive value...
A study examined the effectiveness of exercise testing in asymptomatic patients after coronary revascularization. Ischemia was detected in 262 patients and death was associated with ischemia, suggesting that risk evaluation could be obtained from a standard exercise test rather than exercise echocardiography.
Researchers found that autologous bone marrow-derived mononuclear cell transplants can significantly induce vascular growth, reducing the number of amputations in patients with diabetes suffering from critical limb ischemia. The study showed a significant increase in neovasculogenesis and a decrease in PAD mortality.
Researchers have successfully identified the underlying mechanism of ischemia-reperfusion injury in isolated lungs, a major complication in lung transplantation. The study highlights two key proteins responsible for increased vascular permeability and inflammation, paving the way for potential therapeutic interventions.
A study published in Circulation Research found that the size of a heart attack and subsequent left-ventricular function are significantly different based on the time of day onset of ischemia. The greatest amount of injury to the heart occurs when individuals have a heart attack between 1:00am and 5:00am.
Researchers have discovered a strategy to accelerate arteriogenesis, allowing blood vessels to bypass occlusions and improve blood perfusion. This approach has therapeutic potential for treating ischemic diseases such as heart attacks and strokes.
The International Study of Comparative Health Effectiveness with Medical and Invasive Approaches (ISCHEMIA) will enroll 8,000 patients with stable ischemic heart disease. The study aims to determine whether a routine early invasive strategy is superior to a conservative approach in improving angina-related quality of life.
Researchers found that SIK2 suppressed CREB-mediated gene expression after oxygen and glucose deprivation, increasing neuronal survival in mice lacking SIK2. The SIK2-TORC1-CREB signaling pathway may serve as a potential therapeutic target for promoting neuron survival.
Michele Pelter, a University of Nevada, Reno Orvis School of Nursing researcher, has been awarded $377,000 from the National Institutes of Health to study the detection of ischemia. Ischemia occurs when a plaque rupture causes blockage in the coronary artery, leading to heart attacks if not treated promptly.
A study found that early surgical procedures to open blocked arteries improved blood flow to the heart better than aggressive medical treatment alone. The research showed that revascularization reduced ischemia, a key factor in controlling symptoms.
Researchers at the University of Cincinnati have identified a protein called HAX-1 that protects cardiac cells and muscle from damage during ischemia-reperfusion injury. The study found that HAX-1 levels were reduced in hearts after heart attack, but overproduction improved contractile performance and decreased cell death.
A Mayo Clinic study found that interrupting blood flow for more than 20 minutes during kidney cancer surgery increases the risk of chronic kidney disease. Limiting ischemia time can help avoid this complication.
Scientists have discovered that a tiny piece of RNA in cells lowers protein production needed for skin cell growth, suggesting new treatment strategies for chronic wounds. Researchers used an experimental drug to silence the RNA segment and saw increased protein levels and skin-cell growth.
Researchers found glycolytic oscillations increase damage to heart during anoxia and ischemia. The study used a technique to image heart muscle cells with fluorescent dyes during severe anoxia.
Drug-eluting stents have shown promising results in treating peripheral arterial disease (PAD) patients with critical limb ischemia, rivaling bypass surgery in primary patency rates of up to 81.8% and freedom from major amputation of up to 90.6%. The treatment offers a safe and effective solution for tiny blocked arteries below the knee.
Researchers at Ohio State University have developed a mathematical model of ischemic wound healing, simulating both non-ischemic and ischemic wounds. The model predicts that ischemic wounds will heal in about 20 days, but only 25% will be healed by then.
Research reveals distinct patterns of intestinal response to arterial, venous, or total mesenteric ischemia/reperfusion, influencing the severity of injury. This knowledge could lead to targeted therapies for specific conditions, including venous occlusion, arterial ischemia, and transplant procedures.
A study published in the American Journal of Roentgenology found that MDCT angiography accurately recommends successful treatment for patients with critical limb ischemia, allowing them to avoid surgery. The procedure was also shown to be a low-risk option compared to traditional digital subtraction angiography.
Researchers characterized early-stage liver reperfusion injury mechanisms using rats with varying ischemia-reperfusion periods. Key findings include cell vacuolation, bleb formation, and apoptosis induction.
Researchers found that drug-eluting stents significantly improved patency rates and reduced restenosis in patients with critical limb ischemia. At three years, 60% of treated arteries remained open in the drug-eluting stent group, compared to 10% in the bare-metal stent group.
Research found that patients with hepatitis C who receive livers with high levels of fatty deposits have a more frequent and earlier viral recurrence. Graft survival is inversely proportional to donor liver steatosis, particularly when grafts contain greater than 30% fat and are subject to extended cold ischemic time.
A study published in the World Journal of Gastroenterology found that resveratrol attenuates oxidative stress and histological alterations induced by liver ischemia/reperfusion. The results suggest that resveratrol has protective effects against hepatic I/R injury, making it a potential therapeutic drug for liver transplantation.
Researchers discovered a new mechanism by which temporarily cutting off blood flow to arteries before a heart attack reduces damage caused. The study suggests that boosting the effect of this natural response, possibly through administering nitro-linoleic acid (LNO2) beforehand, may reduce heart attack damage in the future.
A study found that patients at risk for sudden cardiac death after a heart attack are those who develop heart failure or recurrent ischemia. The risk declines over time, but remains high during the first month after heart attack.
A clinical trial reveals that combining ivabradine with current treatments significantly improves exercise capacity and reduces symptoms in patients with stable angina. The study showed a threefold improvement in total exercise duration at four months compared to those receiving standard doses of beta blockers alone.
A study found that most Medicare patients with stable coronary artery disease who underwent elective angioplasty did not have a recommended stress test performed to confirm the necessity of the procedure. The study suggests that this is due to factors such as patient characteristics, physician volume, and geographic variation in care.
Prednisolone administration significantly suppressed serum AST and ALT levels, prevented cell membrane bleb formation, and inhibited calpain mu activation. The study's findings suggest that prednisolone's cytoprotective effect is closely associated with the suppression of these inflammatory markers.
Researchers investigated the role of interleukin-10 in reducing ischemia-reperfusion injury using DHP-PMX therapy. The study demonstrated that IL-10 may inhibit I/R injury, providing new insights into this critical problem.
A study found that Nigella sativa reduces liver enzyme levels and oxidative stress after ischemia-reperfusion injury. The treatment also showed improved histopathology in liver tissue, suggesting its potential as a therapeutic agent for hepatic ischemia reperfusion injury.
Cardiac computed tomography (CTA) is reliable for excluding coronary artery disease but lacks hemodynamic relevance and poses radiation risks. Fundamental insights into CAD suggest a graded prognosis according to ischemia severity, making revascularization unnecessary in some cases.
A rare case of ischemic colitis was caused by the obstruction of mesenteric and splenic veins, leading to impaired colonic venous drainage. Long-term follow-up is necessary due to limited information on this condition.
The Cedars-Sinai Heart Institute will feature presentations on various topics related to cardiovascular health, including emerging technologies for heart valve repair and women's heart issues. Researchers will also discuss the link between prohormones and cardiovascular disease risk among post-menopausal women.
Researchers are exploring optimal dosage and timing for stem cell therapy in adults with strokes and newborns with ischemic injuries. Pilot studies indicate a 25% improvement in recovery, leading to plans for clinical trials within two years.
Researchers found that Secretoneurin (SN) increases production in brain cells following ischemia, improving survival of primary brain cell cultures. In animal models, SN treatment reduced cerebral tissue death, improved motor performance, and enhanced brain function.