Academia.edu no longer supports Internet Explorer.
To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser.
1995, Journal of Neurology Neurosurgery and Psychiatry - J NEUROL NEUROSURG PSYCHIAT
…
2 pages
1 file
Neurobiology of Disease, 2014
Animal data show that high doses of the stimulant drug methamphetamine can damage brain dopamine neurones; however, it is still uncertain whether methamphetamine, at any dose, is neurotoxic to human brain. Since gliosis is typically associated with brain damage and is observed in animal models of methamphetamine exposure, we measured protein levels (intact protein and fragments, if any) of markers of microgliosis (glucose transporter-5, human leukocyte antigens HLA-DRα [TAL.1B5] and HLA-DR/DQ/DPβ [CR3/43]) and astrogliosis (glial fibrillary acidic protein, vimentin, and heat shock protein-27) in homogenates of autopsied brain of chronic methamphetamine users (n = 20) and matched controls (n = 23). Intact protein levels of all markers were, as expected, elevated (+28%-1270%, P b 0.05) in putamen of patients with the neurodegenerative disorder multiple system atrophy (as a positive control) as were concentrations of fragments of glial fibrillary acidic protein, vimentin and heat shock protein-27 (+170%-4700%, P b 0.005). In contrast, intact protein concentrations of the markers were normal in dopamine-rich striatum (caudate, putamen) and in the frontal cortex of the drug users. However, striatal levels of cleaved vimentin and heat shock protein-27 were increased (by 98%-211%, P b 0.05), with positive correlations (r = 0.41-0.60) observed between concentrations of truncated heat shock protein-27 and extent of dopamine loss (P = 0.006) and levels of lipid peroxidation products 4-hydroxynonenal (P = 0.046) and malondialdehyde (P = 0.11). Our failure to detect increased intact protein levels of commonly used markers of microgliosis and astrogliosis could be explained by exposure to methamphetamine insufficient to cause a toxic process associated with overt gliosis; however, about half of the subjects had died of drug intoxication suggesting that "high" drug doses might have been used. Alternatively, drug tolerance to toxic effects might have occurred in the subjects, who were all chronic methamphetamine users. Nevertheless, the finding of above-normal levels of striatal vimentin and heat shock protein-27 fragments (which constituted 10-28% of the intact protein), for which changes in the latter correlated with those of several markers possibly suggestive of damage, does suggest that some astrocytic "disturbance" had occurred, which might in principle be related to methamphetamine neurotoxicity or to a neuroplastic remodeling process. Taken together, our neurochemical findings do not provide strong evidence for either marked microgliosis or astrogliosis in at least a subgroup of human recreational methamphetamine users who used the drug chronically and shortly before death. However, a logistically more difficult quantitative histopathological study is needed to confirm whether glial changes occur or do not occur in brain of human methamphetamine (and amphetamine) users.
International journal of biomedical science : IJBS, 2011
The aim of this study was to identify and describe brain CT findings in patients with poisoning or drug overdose and altered mental status. In this study, 403 patients with some degree of loss of consciousness who referred due to poisoning or drug overdose were evaluated by brain CT. The most common cause of intoxication was suicide. Intoxication status was determined by the physician and was mainly based on a history of intoxication, positive toxicologic screen result, or physical evidence suggesting intoxication. Among 403 unconscious patients, 229 patients who were ingested or inhaled Benzodiazepine, Carbamazepine, Carbon Monoxide, Ethanol, Methanol, Opium, Tricyclic antidepressants, and Tramadol included in the study. Others had used multiple drugs and/or toxins, or their intoxication was unknown. Mean age of patients was 37.6 ± 17.7 years (14-95). Among them, 181 (79%) were male. Among all patients, 92 had consumed opium (40.2%), 47 had consumed Benzodiazepines (20.5%) and othe...
2016
The modern concept of illicit drugs includes a diverse group of chemicals that are harmful to the body, cause dependence and are included in special lists in each country which are constantly updated. One of the target organs of drug influence is the central nervous system. Materials and methods: For the period 2011-2014 in the Department of Forensic medicine and deontology, Sofia, 3945 autopsies of deceased with full forensic analysis were performed, including the gathering of preliminary data, internal and external forensic examination of the body and chemical analysis of blood, urine samples and internal organ parts. In 156 of the cases the chemical analysis showed the presence of illicit drugs. A histological examination of brain tissue was performed in each of the cases and compared with a control group. Results: Frequent macroscopic and microscopic findings were brain edema, engorgement of cerebral vessels, atrophy of the cerebral cortex, cerebral hemorrhages, vasculitis, chan...
Emergency Medicine Journal, 1995
Journal of Clinical Neuroscience, 2003
In the face of escalating recreational use of 'Ecstasy' (3,4-methylenedioxymethamphetamine, MDMA), physicians need to be aware of its possible adverse effects. We report two young patients who suffered subarachnoid haemorrhage following ingestion of 'Ecstasy' tablets. Angiographic studies demonstrated features consistent with vasculitis in both cases. Recognition of this association is important and highlights the significance of eliciting a careful drug history, particularly in cases of 'angiogram negative' subarachnoid haemorrhage. ª
Spinal Cord Series and Cases
Introduction Ecstasy is a commonly used party drug and is the second most popular drug after marijuana among youngsters. Serious health hazards have been described including cardiac diseases, neurological complications, multi-organ failure, and even death. Spinal cord injury/dysfunction (SCI/D) is rarely described as a result of ecstasy ingestion. Case presentation We present a case of a 19-year-old male patient who was admitted to our rehabilitation center, after developing a T11 AIS B SCI/D following recreational use of ecstasy. Discussion In our case magnetic resonance imaging was inconclusive due to artifacts caused by metallic rods used for surgical scoliosis treatment in the past. This individual received no surgical or pharmacological treatments; however, it is questionable whether any specific treatments would have been beneficial. Ecstasy ingestion leads to a serotonin surge and induces microvascular changes. Neurovascular hemorrhage, subarachnoid hemorrhage, de novo aneurysm formation, and subsequent rupture can occur. 5-hydroxytryptamine, which comes from serotonergic terminals, is a very potent vasoconstrictive amine and can thus lead to prolonged vasoconstriction and ischemia. It is most likely that the SCI/D in our case is the result of an ischemic event following the vasoconstrictive effects of ecstasy ingestion. It is important to stress the possible consequences of recreational ecstasy usage and in unexplained SCI/D, one should consider the possibility of drug-related causes.
The British Journal of Psychiatry, 2008
BackgroundNeurotoxic effects of ecstasy have been reported, although it remains unclear whether effects can be attributed to ecstasy, other recreational drugs or a combination of these.AimsTo assess specific/independent neurotoxic effects of heavy ecstasy use and contributions of amphetamine, cocaine and cannabis as part of The Netherlands XTC Toxicity (NeXT) study.MethodEffects of ecstasy and other substances were assessed with 1H-magnetic resonance spectroscopy, diffusion tensor imaging, perfusion weighted imaging and [123I]2β-carbomethoxy-3β-(4-iodophenyl)-tropane ([123I]β-CIT) single photon emission computed tomography (serotonin transporters) in a sample (n=71) with broad variation in drug use, using multiple regression analyses.ResultsEcstasy showed specific effects in the thalamus with decreased [123I]β-CIT binding, suggesting serotonergic axonal damage; decreased fractional anisotropy, suggesting axonal loss; and increased cerebral blood volume probably caused by serotonin d...
Any information contained in this pdf file is automatically generated from digital material submitted to EPOS by third parties in the form of scientific presentations. References to any names, marks, products, or services of third parties or hypertext links to third-party sites or information are provided solely as a convenience to you and do not in any way constitute or imply ECR's endorsement, sponsorship or recommendation of the third party, information, product or service. ECR is not responsible for the content of these pages and does not make any representations regarding the content or accuracy of material in this file. As per copyright regulations, any unauthorised use of the material or parts thereof as well as commercial reproduction or multiple distribution by any traditional or electronically based reproduction/publication method ist strictly prohibited. You agree to defend, indemnify, and hold ECR harmless from and against any and all claims, damages, costs, and expe...
Clinical Neurology and Neurosurgery, 2019
Brain death is a clinical diagnosis characterized by the irreversible loss of neurologic function caused by global injury to the brain, including the brain stem. This is often caused by trauma and subarachnoid hemorrhage amongst other etiologies. This injury results in extensive cerebral edema, a rise in intracranial pressure, and eventual cessation of cerebral blood flow. Although brain death is a clinical diagnosis, ancillary and confirmatory tests are widely used. These are categorized into imaging that demonstrates absence of cerebral blood flow and electroencephalography that demonstrates absence of cortical electrical activity. Cerebral angiography, transcranial Doppler, and cerebral scintigraphy are the only imaging studies to have been validated by the American Academy of Neurology for diagnosis of brain death. However, characteristic findings on computed tomography, computed tomography perfusion, computed tomography angiography, magnetic resonance imaging, and magnetic resonance angiography may suggest the diagnosis. In this article, the clinical criteria, pathophysiology, pathology, and variations in current practice of brain death diagnosis are discussed, and the imaging findings of brain death are reviewed.
Linguistic and philosophical investigations, 2024
Mediterranean Politics, 2024
BAO (Bollettino di Archeologia Online), 2024
Entre la Argentina y España. El espacio transatlántico de la narrativa actual. Ana Gallego Cuiñas (ed.), Madrid / Frankfurt, Iberoamericana / Vervuert, 101-141., 2012
Músicas iberoamericanas interconectadas: Caminos, circuitos y redes, 2024
Wisconsin English Journal
Isogloss. Open Journal of Romance Linguistics , 2024
Routledge Handbook of Historical International Relations, 2021
2024
– В: Годишник. Научен форум „Пловдивски приноси 2014“. Иван Евстратиев Гешов – държавник, общественик, учен, меценат на българската наука и култура. Пловдив, 2014, 121-133. ISSN – 1311 – 9133., 2014
Journal of Cardiovascular Disease Research, 2011
The Journal of Pediatrics, 2010
Ri-Vista. Research for landscape architecture
Frontiers in Behavioral Neuroscience
2016
Journal of Medicinal Plants Studies, 2016
Chemico-Biological Interactions, 1983