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Oct 2018 DOI 10.14302/issn.2328-0182.japst-18-2341
Nyunaї NyembCorresponding author
The present investigation was carried out to evaluate the safety of a stem bark aqueous extract of Harunganamadagascariensis Lam. (Hypericaceae) by determining its potential toxicity after acute and subacute administration in rodents. Acute toxicity tests were carried out in mice and the behavior, death and median lethal dose (LD50) were estimated. Subacute toxicity (28 days) studies were conducted in rats with oral daily doses of 200, 400 and 600 mg/kg. Parameters observed at the end of the subacute tests included changes in body and vital organ weights, mortality, hematological, biochemical, hepatic and kidney effects. Harunganamadagascariensisextract did not produce any visible toxicity or mortality with oral doses up to 2000 mg/kg within 14 days of single treatment, leading to the conclusion that the LD50 is greater than 2000 mg/kg. In the subacute toxicity tests, neither mortality nor visible signs of lethality was seen in rats. No significant change in the weight of the kidney, liver, heart, lungs spleen, pancreas and testicles was observed. Alanine transaminase (ALT) increased significantly in males at 400 and 600 mg/kg, whereas Aspartate transaminase (AST) decreased at 600 mg/kg in female rats. HDL Cholesterol was reduced at 600 mg/kg in female rats. There was a significant increase in urea concentration in female rats at 400 mg/kg. A significant decrease, both in platelet volume distribution (PVD) at 400 mg/kg in male rats and in red cell volume distribution (RDW) at 200 mg/kg were recorded in female rats respectively, but with no changes in other hematologic parameters. Histological study shows normal structure of liver, kidneys and heart of control and treated rats. Results indicate that oral doses of aqueous stem bark of Harunganamadagascariensis are relatively safe in rats; however, assessment of hepatobiliary function should be done during chronic use in humans.
Nov 2020 DOI 10.14302/issn.2470-5020.jnrt-20-3596
Kombate DamelanCorresponding author
University of Kara (Togo)
Background Reversible posterior encephalopathy syndrome (RPE) is a clinical and radiological entity characterized by the acute or subacute fitting of symptoms covering headache, vomiting, visual disturbances, seizures and impairment of consciousness. The pathophysiology of RPE syndrome is poorly described. RPE syndrome is characterized by a reversible cerebral edema of often posterior topography in magnetic resonance imagery (MRI). Cases Presentation We consider RPE syndrome four cases under various conditions that are known as airplane flight, hypertension, non-steroidal anti-inflammatory medication, pregnancy and oldness with several pathologies. The RPE was described with several symptoms like headaches, vomiting, focal motor deficit, paresthesia, seizures, disorders of consciousness and photophobia. The imagery findings were varying from cortical hypersignals in Flair sequences to edema of both cortex and sub cortex. The outcome was good with a complete regression of symptoms and imagery lesions. Conclusion The pathophysiological mechanism of RPE syndrome remains unknown. High blood pressure, renal failure and drugs (anti-depressants, NSAIDs, immunosuppressants) are the most etiological factors. The diagnosis is based on clinical arguments and brain MRI. The main location is posterior. The clinical outcome was good with all the patients in our study, no recurrence was noted.
May 2015 DOI 10.14302/issn.2470-5020.jnrt-14-520
Li Hai-fengCorresponding author
Department of Neurology, Qilu Hospital of Shandong University, Jinan, China
This article has been retracted on November 20, 2015. VIEW THE RETRACTION NOTICE (https://doi.org/10.14302/issn.2470-5020.jnrt-25-5846) In-stent thrombosis (IST) is a complication of angioplasty and stenting, especially in the vessels with smaller diameter. We present a case of subacute IST after stenting treatment of an isolated higher stenosis of the right middle cerebral artery (MCA). Analysis of clinical features and emergent brain image helped to indicate the pathophysiological mechanism underlining the symptoms of this patient. Emergent Transcranial Doppler (TCD) helped to evaluate the compensatory collateral circulation and provided good supporting evidence in deducing the mechanism of IST. Slightly larger size of the implanted stent that caused dissection or vascular endothelium injury was presumed in this patient. Persistent evidence of inflammatory factors might also contribute to IST in this patient.