This work describes the standardization of Micronucleus Assay (MN) and Comet Assay techniques used for the evaluation of the DNA damage on marine bivalves. These techniques are important because they can evaluate the early stress response caused by pollutant agents and environmental changes. Branchial tissues of Semimytilus algosus and Aulacomya ater were used for in vivo and in vitro treatments. Tissues were exposed to the mutagenetic agents Mitomicine C in concentrations of 0,02; 0,04 and 0,06 x 10-6 M and H2 O2 in concentration of 100 μM evaluated at 1, 3, 6, 24 and 48 h. Different solutions for the tissue collection and cell isolation were evaluated, obtaining more cell viability with cold CMFS pH 7,3 saline solution. Micronucleus Assay were modified in the obtaining of suspension cell, we used 0,9% Sodium citrate hipotonic solution, fixation in methanol for seconds after the spread...

This work describes the standardization of Micronucleus Assay (MN) and Comet Assay techniques used for the evaluation of the DNA damage on marine bivalves. These techniques are important because they can evaluate the early stress response caused by pollutant agents and environmental changes. Branchial tissues of Semimytilus algosus and Aulacomya ater were used for in vivo and in vitro treatments. Tissues were exposed to the mutagenetic agents Mitomicine C in concentrations of 0,02; 0,04 and 0,06 x 10-6 M and H2 O2 in concentration of 100 μM evaluated at 1, 3, 6, 24 and 48 h. Different solutions for the tissue collection and cell isolation were evaluated, obtaining more cell viability with cold CMFS pH 7,3 saline solution. Micronucleus Assay were modified in the obtaining of suspension cell, we used 0,9% Sodium citrate hipotonic solution, fixation in methanol for seconds after the spread...

It was evaluated in vivo the cytoprotective capacity of the fruit of Myrciaria dubia H.B.K. MC VAUGH "Camu- camu (Myrtacea) against mutagenic damage caused by potassium bromate (68.5 mg/k) on three mouse cell lines (liver, kidney and blood cells). Mice (n = 120) were divided into three groups which drank ad libitum: distilled water; TI (negative control) and TIII (positive control), the TII group (positive control) drank the aque- ous extract (2 %) of the fruit of Camu-camu. After ten days, only the TII and TIII groups were intraperitoneally injected with a single dose of KBr03(68.5 mg/k). The camu-camu treatment lasted 35 days more, where they were euthanized to determine the frequency of DNA damage by means of the alkaline comet assay protocol. It was observed in all cell lines a cytoprotective effect of camu-camu (p<0.05) with respect with the negative control. The DNA-damaging eff...

Se evaluó in vivo la capacidad citoprotectora del fruto de Myrciaria dubia (Kunth) McVaugh Camu-camu frente al daño mutagénico producido por bromato de potasio (68,5 mg/k) sobre tres líneas celulares de ratón (hígado, riñón y células sanguíneas). Se utilizó ratones (n= 120) divididos en tres grupos los cuales bebieron ad libitum: TI= control negativo (solo agua) y el grupo TIII (control positivo); El grupo TII bebió el extracto acuoso (2% p/v) del fruto de camu-camu. A los diez días se inyectó una dosis única de KBr03 (68,5 mg/kg peso corporal) vía intraperitoneal, a los grupos TII y TIII. El tratamiento con camu-camu continuo 35 días más, luego los ratones fueron eutanizados para determinar la frecuencia del daño al DNA mediante el protocolo del ensayo cometa alcalino. El grupo TII mostró en todas las líneas celulares el efecto citoprotector del camu-camu (p< 0,0...