Cerebral ischemia was induced by 90 min of reversible MCAO under isoflurane anesthesia, as described previously [26 (link), 32 (link), 56 (link)]. In brief, a midline ventral neck incision was made, and unilateral right MCAO was performed by advancing a 6.0 silicone-coated nylon monofilament (Doccol Corporation, CA) into the internal carotid artery 6 mm from the internal carotid–pterygopalatine artery bifurcation via an external carotid artery stump. Rectal temperatures were monitored with a temperature control system (Fine science tools, Canada) and temperature was maintained with an automatic heating pad at ~37 °C during surgery and ischemia. Cerebral blood flow measurements by laser Doppler flowmetry (DRT 4/Moor Instruments Ltd, Devon, UK) confirmed ischemic occlusion (reduction to 85 % of baseline) during MCAO and restoration of blood flow during reperfusion. Surgical controls are used for molecular analysis, a sham surgery in which the suture was not advanced into the internal carotid artery (controls). All mice are allowed to emerge from anesthesia after the initial suture advancement into the MCA and placed back into their home cage until re-anesthetized for reperfusion. This allows for the assessment of intra-ischemic behavioral deficits to confirm successful suture placement.
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Cerebral Ischemia
Cerebral Ischemia
Cerebral Ischemia: A condition caused by insufficient blood flow to the brain, resulting in impaired oxygen and nutrient delivery.
This can lead to tissue damage and neurological dysfunctions.
Symptoms may include headache, confusion, seizures, and paralysis.
Prompt recognition and treatment are crucial to minimize long-term effects.
Researchers can leverage PubCompare.ai's AI-driven platform to enhance reproducibility and accuracy in Cerebral Ischemia studies, locating optimal protocols and driving meaningful insights to advance this field of study.
This can lead to tissue damage and neurological dysfunctions.
Symptoms may include headache, confusion, seizures, and paralysis.
Prompt recognition and treatment are crucial to minimize long-term effects.
Researchers can leverage PubCompare.ai's AI-driven platform to enhance reproducibility and accuracy in Cerebral Ischemia studies, locating optimal protocols and driving meaningful insights to advance this field of study.
Most cited protocols related to «Cerebral Ischemia»
Amputation Stumps
Anesthesia
Blood Circulation
Cerebral Ischemia
Cerebrovascular Circulation
Dental Occlusion
External Carotid Arteries
Internal Carotid Arteries
Ischemia
Isoflurane
Laser-Doppler Flowmetry
Mus
Neck
Nylons
Operative Surgical Procedures
Rectum
Reperfusion
Silicones
Sutures
Anesthesia
Animals
Animals, Laboratory
Arteries
Body Weight
Cerebral Ischemia
Cerebrovascular Accident
Genotype
Institutional Animal Care and Use Committees
Ischemia
Laser-Doppler Flowmetry
Males
Mice, House
Mice, Knockout
Operative Surgical Procedures
physiology
Rectum
Regional Cerebral Blood Flow
Reperfusion
Transients
Amputation Stumps
Anesthesia
Animals
ARID1A protein, human
Bears
Blood Circulation
Cerebral Ischemia
Cerebrovascular Circulation
Cranium
External Carotid Arteries
Internal Carotid Arteries
Ischemia
Isoflurane
Locomotion
Middle Cerebral Artery
Mus
Muscle Tissue
Neck
Operative Surgical Procedures
Rectum
Reperfusion
Silicone Elastomers
Sutures
Tail
Torso
Upper Extremity Paresis
Rats were anesthetized by intraperitoneal injection of thiopental (50 mg/kg) and diazepam (5 mg/kg). After anesthesia induction, each rat was placed in the supine position and fixed on the operating table. A midline incision of approximately two centimeters was made in the neck, and then both common carotid arteries and common jugular veins were exposed carefully by blunt dissection. After the vagus nerve was carefully separated from the carotid artery, cerebral ischemia was induced by bilateral clamping of the common carotid arteries. Bilateral clamping of the common carotid arteries was relieved at the end of the 20‐min period. Thirty seconds later, we applied medication (BPC 157 10 µg/kg; or saline as a 1 ml bath directly on the surgical area. Five minutes after that, the incision was sutured back in layers. The sutured area was cleaned with 70% ethanol and sprayed with an antiseptic solution.
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Anesthesia
Anti-Infective Agents, Local
Bath
BPC 157
Cerebral Ischemia
Common Carotid Artery
Diazepam
Dissection
Ethanol
Injections, Intraperitoneal
Jugular Vein
Neck
Neoplasm Metastasis
Operating Tables
Operative Surgical Procedures
Pharmaceutical Preparations
Pneumogastric Nerve
Saline Solution
Thiopental
Animals
Cerebral Ischemia
Ischemia
Isoflurane
Males
Mus
Oxygen Saturation
Rate, Heart
Rectum
Reperfusion
Respiratory Rate
Silicones
Subarachnoid Hemorrhage
Sutures
Most recents protocols related to «Cerebral Ischemia»
The study cohort consisted of 29 patients (17 females and 12 males; mean age 57 years) with spontaneous SAH that were admitted to the Neurointensive Care Unit of Uppsala University Hospital within 24h from ictus. Median World Federation of Neurosurgical Societies (WFNS) score on admission was 4 [24 (link)]. Diagnosis was made by brain CT scans that were classified according to Fisher scale (median 4) [25 (link)]. Cerebral vasospasm was defined clinically (i.e., not on angiography) as delayed focal ischemic neurological deficit (DIND) and/or decrease in the level of consciousness on the Glasgow coma scale not attributable to new hemorrhage or hydrocephalus and/or as delayed cerebral ischemia (DCI) seen on CT scan. Patients with only ischemic lesions on CT scan without clinical signs of focal neurological deficit were also defined as having “cerebral vasospasm”; hence, the two terms DIND and DCI were used indiscriminately in the present study and their occurrence was recorded and treated accordingly. A research nurse recorded the patients’ functional outcome based on Glasgow Outcome Scale one year post ictus through telephone interviews [26 (link)].
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Angiography
Brain
Cerebral Ischemia
Cerebral Vasospasm
Cerebrovascular Accident
Consciousness
Diagnosis
Females
Hemorrhage
Hydrocephalus
Males
Nurses
Patients
Vision
X-Ray Computed Tomography
Adult Vdrf/f and Cx3cr1CreER (#020940, Jackson Laboratory) mice of C57BL/6 background were mated to generate Vdrf/fCx3cr1CreER/+ mice. Vdrf/f mice were kindly provided by Professor James C. Fleet from Purdue University. Mice were housed under specific pathogen-free conditions with sufficient food and water. Vitamin D and progesterone have been shown to play synergistic roles in relieving acute brain injury following cerebral ischemia [26 (link), 27 (link)]. Hence, to control the confounding impact of endogenous estrogen and progesterone, male adult animals were primarily included as the studied subjects for in vivo experiments. Male Vdrf/fCx3cr1CreER/+ mice were used as Vdr conditional knockout (Vdr-cKO) group, and age matched male Vdrf/f mice were used as controls for in vivo experiments. The mice (8–10 weeks old) were given tamoxifen (75 mg/kg/d, Sigma) dissolved in corn oil intraperitoneally (i.p.) for five consecutive days 2 weeks before the middle cerebral artery occlusion (MCAO) procedure. Neonatal mice were used to obtain primary cells for in vitro experiments. Animal numbers for all experiments are indicated in the figure legends. All experimental protocols completely adhered to ARRIVE (Animal Research: Reporting of In Vivo Experiments) guidelines and were approved by the Animal Care and Use Committee of Xuanwu Hospital (AEEI-2021-295). Adhering to the ARRIVE guidelines, we here designated neurobehavioral functions and infarct volumes as the primary endpoints.
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6-(N-(4-aminoethyl)-N-ethyl)amino-2,3-dihydro-1,4-phthalazine-1,4-dione
Adult
Animals
Cells
Cerebral Ischemia
Corn oil
Ergocalciferol
Estrogens
Food
Infant, Newborn
Infarction
Injuries, Acute Brain
Males
Mice, Inbred C57BL
Middle Cerebral Artery Occlusion
Mus
Progesterone
Specific Pathogen Free
Tamoxifen
As described previously, the cerebral ischemia/reperfusion model was developed by inducing reperfusion 1.5 h after the occlusion of the right middle cerebral artery (de la Rosa et al., 2014 (link)). Mice were first anaesthetized via an intraperitoneal injection of 0.5% pentobarbital sodium. The right common carotid artery (CCA), external carotid artery (ECA), and internal carotid artery (ICA) were separated through a solemn incision in the neck. A small ECA incision was made, and a nylon filament with a diameter of approximately 0.22 mm was inserted through the incision, extending roughly 9–11 mm into the ICA. After 1.5 h, the nylon filaments were removed for reperfusion. Sham mice underwent the same procedure, but no filaments were inserted. From the beginning of the operation to the end of anaesthesia, each mouse’s body temperature was maintained at approximately 37°C by placing them on a thermostatic heating pad. We excluded mice that died during surgery and that failed to model MCAO/R.
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Anesthesia
Body Temperature
Cerebral Ischemia
Common Carotid Artery
Cytoskeletal Filaments
External Carotid Arteries
Injections, Intraperitoneal
Internal Carotid Arteries
Middle Cerebral Artery Occlusion
Mus
Neck
Nylons
Operative Surgical Procedures
Pentobarbital Sodium
Reperfusion
Rosa
On admission, demographic and relevant clinical information was obtained from the electronic medical record. Data collected included Hunt–Hess Scale (HHS), global cerebral edema (GCE), modified Fisher scale (mFS), the presence of intraventricular hemorrhage (IVH), aneurysm location, and the type of treatment. Blood samples for complete blood count (CBC) with differential analysis were collected daily from the day of admission to day 10 of hospitalization to measure peripheral eosinophil count. Clinical outcomes included discharge mortality, functional outcome assessed using the modified Ranking score (mRS), the development of vasospasm, delayed cerebral ischemia (DCI), the presence of any infection (ventriculitis, urinary tract infection, or pneumonia), and the need for ventriculoperitoneal shunt (VPS). All outcome data were adjudicated by at least two attending neurointensivists at a weekly clinical research conference. DCI was defined as the occurrence of a new focal neurological deficit or a decrease of at least two points on the Glasgow Coma Scale lasting for at least 1 h and not attributable to any other causes (10 (link)). Vasospasm was defined as any vascular narrowing detected on angiography and did not necessarily need to correlate with a new neurological deficit. Patients were followed after discharge at 3–6 months, and mRS was recorded. All baseline and outcome variables were dichotomized by a functional outcome (mRS) as good (0–3) and bad (4 (link)–6 (link)).
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Aneurysm
Angiography
Blood
Blood Vessel
Cerebral Edema
Cerebral Ischemia
Conferences
Eosinophil
Hemorrhage
Hospitalization
Infection
Patient Discharge
Patients
Pneumonia
Urinary Tract Infection
Ventriculoperitoneal Shunts
All patients underwent angiography to diagnose the ruptured aneurysm; patients with a negative angiogram were excluded from the present study. The remaining patients were screened for DIC by computed tomography, and the screening was finally confirmed by MRI. Computed tomography or magnetic resonance imaging was performed postoperatively 24 to 48 h before discharge. In addition, CT perfusion (CTP) or transcranial Doppler (TCD) may also be used.
Delayed cerebral ischemia (DCI) was defined as the development of new focal neurological deficits or a decrease in ≥2 points on the Glasgow Coma Scale score for a duration ≥1 h in conscious patients, with the exclusion of any other explanation for the deterioration, such as infection with an associated decrease in consciousness level, rebleeding, edema (increasing) hydrocephalus, hypoglycemia or hyponatremia or hypotension, or any other possible cause for deterioration as judged by the treating physician (Vergouwen et al., 2010 (link); Fan et al., 2021 (link)). Alternatively, new ischemic lesions were found by CT and/or MRI, or perfusion decreased in the corresponding brain functional area showed by CTP, and/or blood flow velocity increased in the corresponding brain area showed by TCD.
Delayed cerebral ischemia (DCI) was defined as the development of new focal neurological deficits or a decrease in ≥2 points on the Glasgow Coma Scale score for a duration ≥1 h in conscious patients, with the exclusion of any other explanation for the deterioration, such as infection with an associated decrease in consciousness level, rebleeding, edema (increasing) hydrocephalus, hypoglycemia or hyponatremia or hypotension, or any other possible cause for deterioration as judged by the treating physician (Vergouwen et al., 2010 (link); Fan et al., 2021 (link)). Alternatively, new ischemic lesions were found by CT and/or MRI, or perfusion decreased in the corresponding brain functional area showed by CTP, and/or blood flow velocity increased in the corresponding brain area showed by TCD.
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Aneurysm, Ruptured
Angiography
Blood Flow Velocity
Brain
Cerebral Ischemia
Consciousness
Diagnosis
Edema
Hydrocephalus
Hypoglycemia
Hyponatremia
Infection
Patient Discharge
Patients
Perfusion
Physicians
Ultrasonography, Doppler, Transcranial
X-Ray Computed Tomography
Top products related to «Cerebral Ischemia»
Sourced in Sweden, China
The PeriFlux System 5000 is a comprehensive laser Doppler perfusion monitoring system designed for clinical and research applications. It provides continuous, non-invasive measurement of microvascular blood flow, perfusion, and oxygen tissue saturation.
Sourced in United Kingdom, United States
Laser Doppler flowmetry is a non-invasive technique used to measure blood flow. It utilizes the Doppler effect to detect the movement of red blood cells within the microcirculation. The technique provides real-time, continuous measurements of tissue perfusion.
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The TTC (Triphenyltetrazolium Chloride) is a laboratory reagent used for various analytical and diagnostic applications. It is a colorless compound that is reduced to a red formazan product in the presence of metabolically active cells or tissues. This color change is utilized to assess cell viability, detect active enzymes, and measure cellular respiration in a wide range of biological samples.
Sourced in Sweden
The PeriFlux 5000 is a laser Doppler perfusion monitoring system designed for clinical and research applications. It measures microvascular blood flow and tissue perfusion using laser Doppler technology.
Sourced in Sweden, United States, France
Laser Doppler flowmetry is a non-invasive technique used to measure tissue perfusion. It utilizes a low-power laser to detect the Doppler shift of light, which is proportional to the velocity of blood cells moving within the tissue. This technology provides a quantitative assessment of microvascular blood flow without the need for exogenous tracers or dyes.
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Rose Bengal is a laboratory dye used as a reagent in various analytical and diagnostic applications. It is a red, crystalline powder that is soluble in water and certain organic solvents. Rose Bengal is commonly used as a staining agent in cell biology, histology, and ophthalmology procedures.
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Isoflurane is an inhaled anesthetic agent used to induce and maintain general anesthesia in medical and veterinary settings. It is a clear, colorless, and volatile liquid. Isoflurane functions as a potent and effective anesthetic by depressing the central nervous system, resulting in unconsciousness, analgesia, and muscle relaxation.
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Evans blue is a dye used as a laboratory reagent. It is a blue-colored dye that binds to albumin in the blood, allowing for the measurement and visualization of blood volume and albumin distribution. The dye has a strong blue color and is soluble in water.
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Fetal Bovine Serum (FBS) is a cell culture supplement derived from the blood of bovine fetuses. FBS provides a source of proteins, growth factors, and other components that support the growth and maintenance of various cell types in in vitro cell culture applications.
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Zoletil is a general anesthetic and analgesic used in veterinary medicine. It is a combination of two active compounds, tiletamine and zolazepam, that work together to induce a state of deep sedation and pain relief in animals. The product is administered by injection and is commonly used for a variety of veterinary procedures, including surgery, diagnostic imaging, and minor treatments. Zoletil is intended for use under the supervision of licensed veterinary professionals.
More about "Cerebral Ischemia"
Cerebral ischemia, also known as brain ischemia or cerebrovascular ischemia, is a condition characterized by insufficient blood flow to the brain.
This can lead to impaired oxygen and nutrient delivery, resulting in tissue damage and various neurological dysfunctions.
Symptoms of cerebral ischemia may include headache, confusion, seizures, and paralysis.
Prompt recognition and appropriate treatment are crucial to minimize the long-term effects of cerebral ischemia.
Researchers can leverage advanced tools and technologies to enhance the reproducibility and accuracy of their studies in this field.
One such platform is PubCompare.ai, which utilizes AI-driven capabilities to help researchers locate optimal protocols and drive meaningful insights.
In the context of cerebral ischemia research, various techniques and instruments can be employed, such as the PeriFlux System 5000, Laser Doppler flowmetry, and TTC (Triphenyltetrazolium chloride) staining.
The PeriFlux 5000 is a sophisticated instrument used for microvascular blood flow measurements, while Laser Doppler flowmetry is a non-invasive method for assessing tissue perfusion.
TTC staining is a common method used to differentiate between viable and non-viable tissue in ischemic models.
Additionally, other agents like Rose Bengal, Isoflurane, Evans blue, and FBS (Fetal Bovine Serum) may be utilized in cerebral ischemia studies.
Rose Bengal is a photosensitive dye used in photodynamic therapy, while Isoflurane is a commonly used anesthetic.
Evans blue is a dye that binds to albumin and can be used to assess blood-brain barrier integrity, and FBS is a common cell culture supplement.
By leveraging the insights and capabilities offered by platforms like PubCompare.ai, researchers can enhance the reproducibility and accuracy of their cerebral ischemia studies, leading to more reliable and impactful findings that advance the understanding and treatment of this condition.
This can lead to impaired oxygen and nutrient delivery, resulting in tissue damage and various neurological dysfunctions.
Symptoms of cerebral ischemia may include headache, confusion, seizures, and paralysis.
Prompt recognition and appropriate treatment are crucial to minimize the long-term effects of cerebral ischemia.
Researchers can leverage advanced tools and technologies to enhance the reproducibility and accuracy of their studies in this field.
One such platform is PubCompare.ai, which utilizes AI-driven capabilities to help researchers locate optimal protocols and drive meaningful insights.
In the context of cerebral ischemia research, various techniques and instruments can be employed, such as the PeriFlux System 5000, Laser Doppler flowmetry, and TTC (Triphenyltetrazolium chloride) staining.
The PeriFlux 5000 is a sophisticated instrument used for microvascular blood flow measurements, while Laser Doppler flowmetry is a non-invasive method for assessing tissue perfusion.
TTC staining is a common method used to differentiate between viable and non-viable tissue in ischemic models.
Additionally, other agents like Rose Bengal, Isoflurane, Evans blue, and FBS (Fetal Bovine Serum) may be utilized in cerebral ischemia studies.
Rose Bengal is a photosensitive dye used in photodynamic therapy, while Isoflurane is a commonly used anesthetic.
Evans blue is a dye that binds to albumin and can be used to assess blood-brain barrier integrity, and FBS is a common cell culture supplement.
By leveraging the insights and capabilities offered by platforms like PubCompare.ai, researchers can enhance the reproducibility and accuracy of their cerebral ischemia studies, leading to more reliable and impactful findings that advance the understanding and treatment of this condition.