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Journal of Cellular and Molecular... Sep 2016The autophagy-lysosomal pathway is a self-catabolic process by which dysfunctional or unnecessary intracellular components are degraded by lysosomal enzymes. Proper... (Review)
Review
The autophagy-lysosomal pathway is a self-catabolic process by which dysfunctional or unnecessary intracellular components are degraded by lysosomal enzymes. Proper function of this pathway is critical for maintaining cell homeostasis and survival. Subarachnoid haemorrhage (SAH) is one of the most devastating forms of stroke. Multiple pathogenic mechanisms, such as inflammation, apoptosis, and oxidative stress, are all responsible for brain injury and poor outcome after SAH. Most recently, accumulating evidence has demonstrated that the autophagy-lysosomal pathway plays a crucial role in the pathophysiological process after SAH. Appropriate activity of autophagy-lysosomal pathway acts as a pro-survival mechanism in SAH, while excessive self-digestion results in cell death after SAH. Consequently, in this review article, we will give an overview of the pathophysiological roles of autophagy-lysosomal pathway in the pathogenesis of SAH. And approaching the molecular mechanisms underlying this pathway in SAH pathology is anticipated, which may ultimately allow development of effective therapeutic strategies for SAH patients through regulating the autophagy-lysosomal machinery.
Topics: Animals; Autophagy; Brain Injuries; Cathepsins; Humans; Lysosomes; Models, Biological; Subarachnoid Hemorrhage
PubMed: 27027405
DOI: 10.1111/jcmm.12855 -
Laeknabladid Jun 2011Spontaneous subarachnoid hemorrhage is a bleeding in to the subarachnoid space without trauma. Aneurysms are the underlying cause in 80% of the cases. Among other causes... (Review)
Review
Spontaneous subarachnoid hemorrhage is a bleeding in to the subarachnoid space without trauma. Aneurysms are the underlying cause in 80% of the cases. Among other causes are: arteriovenous malformations, anticoagulation, vasculitis or brain tumor. Spontaneous subarachnoid hemorrhage is a serious disease, where up to half of the patients die. Of those who survive, only half return to work and many have a reduced quality of life. To prevent rebleeding the aneurysm is closed either with endovascular coiling or neurosurgical clipping.
Topics: Cerebral Angiography; Embolization, Therapeutic; Endovascular Procedures; Humans; Magnetic Resonance Imaging; Neurosurgical Procedures; Quality of Life; Recurrence; Risk Factors; Subarachnoid Hemorrhage; Treatment Outcome
PubMed: 21659676
DOI: 10.17992/lbl.2011.06.377 -
BMJ Clinical Evidence Mar 2016Subarachnoid haemorrhage (SAH) may arise spontaneously or as a result of trauma. Spontaneous SAH accounts for about 5% of all strokes. Ruptured aneurysms are the cause... (Review)
Review
INTRODUCTION
Subarachnoid haemorrhage (SAH) may arise spontaneously or as a result of trauma. Spontaneous SAH accounts for about 5% of all strokes. Ruptured aneurysms are the cause of 85% of spontaneous SAH. The most characteristic clinical feature is sudden-onset severe headache. Other features include vomiting, photophobia, and focal neurological deficit or seizures, or both. As the headache may have insidious onset in some cases, or may even be absent, a high degree of suspicion is required to diagnose SAH with less typical presentations.
METHODS AND OUTCOMES
We conducted a systematic review, aiming to answer the following clinical question: What are the effects of surgical treatments for people with confirmed aSAH? We searched: Medline, Embase, The Cochrane Library, and other important databases up to October 2014 (Clinical Evidence reviews are updated periodically; please check our website for the most up-to-date version of this review).
RESULTS
At this update, searching of electronic databases retrieved 82 studies. After deduplication and removal of conference abstracts, 47 records were screened for inclusion in the overview. Appraisal of titles and abstracts led to the exclusion of 33 studies and the further review of 14 full publications. Of the 14 full articles evaluated, one systematic review, one RCT, and four further reports were added at this update. We performed a GRADE evaluation for six PICO combinations.
CONCLUSIONS
In this systematic overview, we categorised the efficacy for one comparison based on information about the effectiveness and safety of endovascular coiling versus surgical clipping.
Topics: Endovascular Procedures; Humans; Subarachnoid Hemorrhage; Surgical Instruments
PubMed: 26983641
DOI: No ID Found -
Critical Care Medicine Feb 2009Acute aneurysmal subarachnoid hemorrhage (SAH) is a complex multifaceted disorder that plays out over days to weeks. Many patients with SAH are seriously ill and require... (Review)
Review
OBJECTIVE
Acute aneurysmal subarachnoid hemorrhage (SAH) is a complex multifaceted disorder that plays out over days to weeks. Many patients with SAH are seriously ill and require a prolonged intensive care unit stay. Cardiopulmonary complications are common. The management of patients with SAH focuses on the anticipation, prevention, and management of these secondary complications.
DATA SOURCES
Source data were obtained from a PubMed search of the medical literature.
DATA SYNTHESIS AND CONCLUSION
The rupture of an intracranial aneurysm is a sudden devastating event with immediate neurologic and cardiac consequences that require stabilization to allow for early diagnostic angiography. Early complications include rebleeding, hydrocephalus, and seizures. Early repair of the aneurysm (within 1-3 days) should take place by surgical or endovascular means. During the first 1-2 weeks after hemorrhage, patients are at risk of delayed ischemic deficits due to vasospasm, autoregulatory failure, and intravascular volume contraction. Delayed ischemia is treated with combinations of volume expansion, induced hypertension, augmentation of cardiac output, angioplasty, and intra-arterial vasodilators. SAH is a complex disease with a prolonged course that can be particularly challenging and rewarding to the intensivist.
Topics: Critical Care; Education, Continuing; Humans; Subarachnoid Hemorrhage
PubMed: 19114880
DOI: 10.1097/CCM.0b013e318195865a -
Neurology India 2018There is a paucity of information about which impairments, cognitive or neurological, determine the functional outcome after aneurysmal subarachnoid hemorrhage (SAH).... (Observational Study)
Observational Study
BACKGROUND
There is a paucity of information about which impairments, cognitive or neurological, determine the functional outcome after aneurysmal subarachnoid hemorrhage (SAH). The present study aims to determine the relative contributions of each of the above impairments for determining the functional outcome after SAH.
MATERIALS AND METHODS
This is a prospective observational study including patients with aneurysmal SAH. Patients underwent assessment at 6 months after discharge for neurological deficits, cognitive impairment, and functional outcome using the National Institute of Health and Social Sciences (NIHSS) score, National Institute of Mental Health and Neurosciences (NIMHANS) Neuropsychology Test Battery, and Glasgow Outcome Scale - Extended (GOSE), respectively. The correlation of GOSE with NIHSS scores and neuropsychological test scores was done using Spearman's rho correlation coefficient.
RESULT
Fifty-six patients underwent assessment using all the three tools, i.e., NIHSS, neuropsychological tests, and GOSE. Fifty-one healthy volunteers participated in the study for neurological examination and neuropsychological assessment. At 6 months, patients with SAH had significant cognitive impairment as compared to controls. The mean NIHSS score was 10.01 ± 9.04, indicating moderately severe impairment. The median GOSE at 6 months was 6 (range: 3-8) indicating the upper level of moderate disability. There was a significant correlation of NIHSS scores with GOSE, Spearman's rho -0.653 (<0.001). There was a significant correlation of neuropsychological test scores with GOSE and NIHSS. The Spearman's rho for NIHSS vs GOSE was within range for neuropsychological scores vs GOSE.
CONCLUSION
Both the neurological deficits and cognitive impairment determine functional outcome after SAH at 6 months.
Topics: Adult; Cognition Disorders; Female; Glasgow Outcome Scale; Humans; Male; Middle Aged; Neuropsychological Tests; Prospective Studies; Subarachnoid Hemorrhage
PubMed: 30504571
DOI: 10.4103/0028-3886.246243 -
Neurologia Medico-chirurgica Nov 2017The number of elderly patients with an aneurysmal subarachnoid hemorrhage (aSAH) has been increasing in aging- or aged societies in many countries. A treatment strategy... (Review)
Review
The number of elderly patients with an aneurysmal subarachnoid hemorrhage (aSAH) has been increasing in aging- or aged societies in many countries. A treatment strategy for the elderly with aSAH has not been established, although many studies have been published emphasizing poor outcome for aSAH. The aim of this study was to analyze the factors and treatments affecting outcome in aSAH in the elderly in a systematic review of the literature by investigating patients over age 75. A literature search was done for "elderly aSAH" in PubMed and Embase. Literature with a clear description of treatment measures for aneurysmal occlusion and outcome was selected. Twelve studies, consisted of 816 cases, met the eligibility criteria. Patient characteristics included 83.2% female, 33.8% poor clinical grade on admission, 57.1% Fischer group 3, and 41% internal carotid artery aneurysm. As complications, symptomatic vasospasm was seen in 25.5% of patients, hydrocephalus in 31.1%, and medical complication in 38.4%. Favorable outcome was 35.0% in total, 45.3% for clipping, 36.3% for coiling, and 9.0% for conservative treatment. Several studies by multivariate analysis indicated that poor clinical grade on admission could be a risk factor for neurological outcome and mortality. Advanced age and selection of conservative treatment without aneurysmal occlusion could be a risk factor for mortality. Patients under age 85 with good clinical grade on admission can be candidates for treatment of aneurysm repair. However, treatment for patients over age 85 or with poor clinical grade should be carefully determined.
Topics: Age Factors; Aged, 80 and over; Humans; Subarachnoid Hemorrhage
PubMed: 28835583
DOI: 10.2176/nmc.ra.2017-0057 -
British Journal of Anaesthesia Aug 2023There is a lack of consistent, evidence-based guidelines for the management of patients with fever after brain injury. The aim was to update previously published...
Targeted temperature management in patients with intracerebral haemorrhage, subarachnoid haemorrhage, or acute ischaemic stroke: updated consensus guideline recommendations by the Neuroprotective Therapy Consensus Review (NTCR) group.
BACKGROUND
There is a lack of consistent, evidence-based guidelines for the management of patients with fever after brain injury. The aim was to update previously published consensus recommendations on targeted temperature management after intracerebral haemorrhage, aneurysmal subarachnoid haemorrhage, and acute ischaemic stroke in patients who require admission to critical care.
METHODS
A modified Delphi consensus, the Neuroprotective Therapy Consensus Review (NTCR), included 19 international neuro-intensive care experts with a subspecialty interest in the acute management of intracerebral haemorrhage, aneurysmal subarachnoid haemorrhage, and acute ischaemic stroke. An online, anonymised survey was completed ahead of the meeting before the group came together to consolidate consensus and finalise recommendations on targeted temperature management. A threshold of ≥80% for consensus was set for all statements.
RESULTS
Recommendations were formulated based on existing evidence, literature review, and consensus. After intracerebral haemorrhage, aneurysmal subarachnoid haemorrhage, and acute ischaemic stroke in patients who require critical care admission, core temperature should ideally be monitored continuously and maintained between 36.0°C and 37.5°C using automated feedback-controlled devices, where possible. Targeted temperature management should be commenced within 1 h of first fever identification with appropriate diagnosis and treatment of infection, maintained for as long as the brain remains at risk of secondary injury, and rewarming should be controlled. Shivering should be monitored and managed to limit risk of secondary injury. Following a single protocol for targeted temperature management across intracerebral haemorrhage, aneurysmal subarachnoid haemorrhage, and acute ischaemic stroke is desirable.
CONCLUSIONS
Based on a modified Delphi expert consensus process, these guidelines aim to improve the quality of targeted temperature management for patients after intracerebral haemorrhage, aneurysmal subarachnoid haemorrhage, and acute ischaemic stroke in critical care, highlighting the need for further research to improve clinical guidelines in this setting.
Topics: Humans; Subarachnoid Hemorrhage; Stroke; Brain Ischemia; Cerebral Hemorrhage; Ischemic Stroke; Hypothermia, Induced
PubMed: 37225535
DOI: 10.1016/j.bja.2023.04.030 -
British Journal of Anaesthesia Jul 2016: The leading cause of morbidity and mortality after surviving the rupture of an intracranial aneurysm is delayed cerebral ischaemia (DCI). We present an update of... (Review)
Review
UNLABELLED
: The leading cause of morbidity and mortality after surviving the rupture of an intracranial aneurysm is delayed cerebral ischaemia (DCI). We present an update of recent literature on the current status of prevention and treatment strategies for DCI after aneurysmal subarachnoid haemorrhage. A systematic literature search of three databases (PubMed, ISI Web of Science, and Embase) was performed. Human clinical trials assessing treatment strategies, published in the last 5 yr, were included based on full-text analysis. Study data were extracted using tables depicting study type, sample size, and outcome variables. We identified 49 studies meeting our inclusion criteria. Clazosentan, magnesium, and simvastatin have been tested in large high-quality trials but failed to show a beneficial effect. Cilostazol, eicosapentaenoic acid, erythropoietin, heparin, and methylprednisolone yield promising results in smaller, non-randomized or retrospective studies and warrant further investigation. Topical application of nicardipine via implants after clipping has been shown to reduce clinical and angiographic vasospasm. Methods to improve subarachnoid blood clearance have been established, but their effect on outcome remains unclear. Haemodynamic management of DCI is evolving towards euvolaemic hypertension. Endovascular rescue therapies, such as percutaneous transluminal balloon angioplasty and intra-arterial spasmolysis, are able to resolve angiographic vasospasm, but their effect on outcome needs to be proved. Many novel therapies for preventing and treating DCI after aneurysmal subarachnoid haemorrhage have been assessed, with variable results. Limitations of the study designs often preclude definite statements. Current evidence does not support prophylactic use of clazosentan, magnesium, or simvastatin. Many strategies remain to be tested in larger randomized controlled trials.
CLINICAL TRIAL REGISTRATION
This systematic review was registered in the international prospective register of systematic reviews.
PROSPERO
CRD42015019817.
Topics: Angioplasty; Brain Ischemia; Humans; Neuroprotective Agents; Subarachnoid Hemorrhage
PubMed: 27160932
DOI: 10.1093/bja/aew095 -
Seminars in Immunopathology May 2023Acute ischaemic and haemorrhagic stroke account for significant disability and morbidity burdens worldwide. The myeloid arm of the peripheral innate immune system is... (Review)
Review
Acute ischaemic and haemorrhagic stroke account for significant disability and morbidity burdens worldwide. The myeloid arm of the peripheral innate immune system is critical in the immunological response to acute ischaemic and haemorrhagic stroke. Neutrophils, monocytes, and dendritic cells (DC) contribute to the evolution of pathogenic local and systemic inflammation, whilst maintaining a critical role in ongoing immunity protecting against secondary infections. This review aims to summarise the key alterations to myeloid immunity in acute ischaemic stroke, intracerebral haemorrhage (ICH), and subarachnoid haemorrhage (SAH). By integrating clinical and preclinical research, we discover how myeloid immunity is affected across multiple organ systems including the brain, blood, bone marrow, spleen, and lung, and evaluate how these perturbations associate with real-world outcomes including infection. These findings are placed in the context of the rapidly developing field of human immunology, which offers a wealth of opportunity for further research.
Topics: Humans; Stroke; Brain Ischemia; Hemorrhagic Stroke; Subarachnoid Hemorrhage
PubMed: 36346451
DOI: 10.1007/s00281-022-00968-y -
BMJ (Clinical Research Ed.) Jul 2006
Review
Topics: Aneurysm, Ruptured; Early Diagnosis; Headache; Humans; Intracranial Aneurysm; Prognosis; Referral and Consultation; Subarachnoid Hemorrhage; Tomography, X-Ray Computed
PubMed: 16873858
DOI: 10.1136/bmj.333.7561.235