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Wyszukujesz frazę "Mathai, B.K." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Evaluation of antiepileptic activity of methanolic leaves extract of Tragia involucrata Linn. in mice
Autorzy:
Varma, G.G.
Mathai, B.K.
Das, K.
Gowda, G.
Rammohan, S.
Einstein, J.W.
Powiązania:
https://bibliotekanauki.pl/articles/11927.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
antiepileptic drug
antiepileptic activity
methanolic extract
leaf
plant extract
Tragia involucrata
Indian stinging nettle
mice
mouse
anticonvulsant action
pentylenetetrazol
picrotoxin
Opis:
The present investigation was aimed to study an antiepileptic activity of methanolic extract of Tragia involucrata Linn in mice. In vivo screening models like maximal electroshock-induced convulsion (MES), pentylenetetrazole (PTZ) and picrotoxin (PTX) induced models are used to evaluate the antiepileptic effects of the extracts. The biochemical estimation was done by measuring the lipid peroxidation and reduced glutathione (GSH). In the MES induced convulsion, methanolic extract of Tragia involucrata (METI) at high dose (800 mg/kg body weight), showed high significant inhibition on tonic hind limb extension (THLE, 6.83 ±0.30***) and decrease in duration of stupor period (108.7 ±6.53***). In PTZ and PTX induced model METI (400 mg/kg and 800 mg/kg) showed significant delay on the onset of convulsions, decreased duration of convulsion and reduced mortality significantly. It also showed significant decrease in brain MDA level in lipid peroxidation profile, and increase in the brain glutathione levels in mice against PTZ induced convulsion. The results confirmed that Tragia involucrata Linn possesses dose dependent antiepileptic activity.
Źródło:
International Letters of Natural Sciences; 2014, 12, 2
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
John William Trevan’s concept of Median Lethal Dose (LD50/LC50) – more misused than used
Autorzy:
Pillai, S.K.
Kobayashi, K.
Michael, M.
Mathai, T.
Sivakumar, B.
Sadasivan, P.
Powiązania:
https://bibliotekanauki.pl/articles/2098545.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Tematy:
lethal dose
toxic substance
acute toxicity
Opis:
Introduction: Median lethal dose (MLD) has been a controversial subject among biologists and animal ethicists since its inception in 1927 by Trevan. Toxicologists use MLD (LD50) as the first step to assess the toxicity of a substance. Animal ethicists criticize LD50 tests because animals suffer pain, and LD50 is irreproducible. The disadvantage of classifying chemicals based on LD50, the importance of the ‘characteristics’ proposed by Trevan, and the ideal mortality range for determining the best estimate of LD50 are also discussed. Objective: The aim of this review was to understand Trevan’s concept of LD50 and the method of Litchfield and Wilcoxon (L and W), and Finney’s probit analysis for LD50 determination Materials and method: A literature survey was conducted using Google search and Pubmed. Simulated data set was used for identifying the ideal mortality range for calculating the ‘best estimate’ of LD50. Brief description of the state of knowledge: After Trevan, the extensively used classical methods for LD50 determination are Finney’s probit analysis and the L and W method. Animal ethicists questioned LD50, because of its irreproducibility. Presently used methods for LD50 tests do not provide information on the dose-response, hence assessing the complete spectrum of toxicity is not possible. However, LD50 is used to classify chemicals. Conclusions: 'The 'characteristic' is more specific than the slope or LD50 of a dose-response curve. LD50 does not manifest the exact nature of the toxicity of a substance; hence, classifying chemicals based on LD50s may have little relevance
Źródło:
Journal of Pre-Clinical and Clinical Research; 2021, 15, 3; 137-141
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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