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The study attempts to determine the involvement of oxidative stress in cardiovascular manifestations during Leiurus quinquestriatus quinquestriatus (LQQ) scorpion envenomation and to examine the possible protective role of red grape seed proanthocyanidins (GSP) against such effects. Lethality studies conducted in mice demonstrated a significant (p<0.01) protection of GSP against venom lethality...
Cardiotoxin-4b (CTX-4b), isolated from Naja naja sputatrix venom, shows lethality in several cell types. Employing murine primary cortical neurons, this study was undertaken to investigate the molecular mechanisms of CTX-4b in the induction of neuronal death. CTX-4b induced a dose- and time-dependent neuronal death. Strong induction of calpains as early as 4h post-CTX-4b 75nM treatment was detected...
Venomous organisms are usually resistant to their own venoms, and utilize mechanical behavioral means to resolve intra-specific conflicts, such as those occurring over territory, mates or social status. The present study deals with a venom apparatus, which has been specifically designed for conspecific aggression, by the aid of a unique pharmacology.Actinarian sea anemones such as Actinia equina utilize...
The effects of cyanobacterial cells containing microcystins (MCs), toxins from cyanobacteria, on oxidative stress biomarkers from liver and kidney of Tenca fish (Tinca tinca) were investigated under laboratory conditions. Moreover, a histopathological study of liver, kidney, heart and intestine tissues was performed. Fish were orally exposed to cyanobacterial cells dosing 0, 5, 11, 25 and 55μg MC-LR/fish...
Acute renal failure is a serious condition of Crotalus bites, which could be treated with statins. The effects of Crotalus durissus terrificus venom (vCdt) and simvastatin on renal function, oxidative stress and representative plasma, urinary and renal aminopeptidase (AP) activities were evaluated in mice. Eighty percent LD50 of vCdt caused hyperuricemia and urinary hypoosmolality (100%) and hypercreatinemia...
Ochratoxin A (OTA) is a mycotoxin often found in cereals and agricultural products. There is unequivocal evidence of renal carcinogenicity of OTA in male rats, although the mechanism of action is unknown. Several reports suggest that exposure to OTA resulted in oxidative stress, genotoxicity and DNA damage. Therefore, the aim of the current study was to evaluate the protective effects of aqueous extract...
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