Non-biodegradable metals such as mercury accumulate in living organisms during
life (bioaccumulation) and also within trophic webs (biomagnification) and may
reach high concentrations in humans. The contamination of humans by mercury in
drinking water and food may be common, in particular in riverside communities
that have a diet rich in fish.
In vitro
studies of human cell
lines exposed to the cytotoxic and mutagenic effects of methylmercury have shown
that prolactin has potential cytoprotective properties and may act as a
co-mitogenic factor and inhibitor of apoptosis. The present
in
vivo
study investigated the protective potential of prolactin
against the toxic effects of methylmercury in the mammal
Mus
musculus
. Histological and biochemical analyses, together with
biomarker of genotoxicity, were used to verify the protective potential of
prolactin in mice exposed to methylmercury. The reduction in kidney and liver
tissue damage was not significant. However, results of biochemical and genotoxic
analyses were excellent. After prolactin treatment, a significant reduction was
observed in biochemical parameters and mutagenic effects of methylmercury. The
study results therefore indicated that prolactin has protective effects against
the toxicity of methylmercury and allowed us to suggest the continuation of
research to propose prolactin in the future, as an alternative to prevent the
damage caused by mercury, especially in populations that are more exposed.