Abstract
Rosmarinus officinalis, also named rosemary, is a native plant from
the Mediterranean region that is useful for the treatment of inflammatory
diseases. Studies using experimental models and/or in vitro tests
have shown the important biological effects of rosemary. In this context,
the mechanism of the anti-inflammatory activity of rosemary must be
investigated to support the discovery of new substances with
anti-inflammatory effects. The aim of the present study was to investigate
the anti-inflammatory effects of crude extract oil free obtained from the
leaves of rosemary in an animal model of inflammation, thus evaluating its
medicinal use for the treatment of inflammatory conditions. Also its
ethanol, hexane, and ethyl acetate fractions, as well as its isolated
compounds carnosol and rosmarinic acid were analyzed. Swiss mice were used
for the in vivo experiments. The effect of this herb on the
inhibition of the leukocytes, exudation, myeloperoxidase, and
adenosine-deaminase activities, nitrite/nitrate, interleukin 17A, and
interleukin 10 levels and mRNA expression was determined. The crude extract
and its derived fractions, in addition to its isolated compounds, inhibited
leukocytes and decreased exudation and myeloperoxidase and
adenosine-deaminase activities, as well as nitrite/nitrate and interleukin
17A levels and mRNA expression, besides increasing interleukin 10 levels and
mRNA expression. Rosemary showed important anti-inflammatory activity by
inhibiting leukocytes and decreasing exudation. These effects were
associated with a decrease in the proinflammatory parameters
(myeloperoxidase, adenosine-deaminase, nitrite/nitrate, and interleukin 17A)
and an increase in the anti-inflammatory cytokine (interleukin 10). This
study confirms the anti-inflammatory properties of rosemary and validates
its use in folk medicine to treat inflammatory diseases such as rheumatism
and asthma.
Key words
anti-inflammatory effects - cytokines - mouse model of pleurisy -
Rosmarinus officinalis
- Lamiaceae