EVALUATION OF ANTIDEPRESSIVE AND ANXIOLYTIC POTENCIAL OF FRUTICULIN A IN BEHAVIORAL CHANGES INDUCED BY CLONIDINE IN MALE MICE
ResumoIntroduction: Fruticulin A is a rare compound in nature, it has been isolated from the ethanolic extract of
Salvia lachnostachys, being its major component. Piccinelli et al. (2014)(1)has observed the compound
showed anti--?inflammatory activity in carrageenan--?induced paw oedema model in mice. Objectives: To
investigate Fruticulin A potential in modifying behavioral induced by chronic administration of clonidine
in mice. Material and Methods: Male Swiss mice were separated as follows: Naive (n = 8): (0.9% saline
solution, ip); Control (n=8): (clonidine 0.8 mg/kg (ip)); Fruticulin A (n=8): (clonidine 0.8 mg/kg ip +
Fruticulin A 3 mg/kg vo). Animals received saline or clonidine ip for 7 days and oral treatment with saline
or Fruticulin A has started from the fifth day. The literature reports that administration of clonidine (an
alpha--?2 adrenergic agonist selective for pre synaptic neurons) for 7 days at 0.8 mg/kg ip, can determine
behavioral changes in mice, including depression of the central nervous system (CNS)(2). General behavior
was evaluated in the open field apparatus for 5 minutes after 7 days of treatment with clonidine or saline
and the parameters evaluated were locomotion, the number of lifting, cleaning and freezing (in seconds).
Results: In Locomotor activity chronic administration for 7 days of clonidine led to a decrease in
exploration when compared to naïve group (162.0 ± 8.0***) versus Control (111.0 ± 6.0), which was
reversed by treatment with Frutriculin A for three days (150.5 ± 3.9***). The Lifting was decreased in
Control groups (38 ± 2.4) when compared with naïve group (50 ± 3.0**) and once more Fruticulin A (56 ±
2.63***) reversed the clonidine induced change in behavior. Clonidine has increased (control: 22.8 ± 3.0)
anxiety disorder (characterized by increased cleaning time --? Grooming) when compared to Naive (10.8
± 2.95*) and Fruticulin A (12.83 ± 1.1*) reduced the grooming behavior. The occurrence of depressive
behavior (characterized by the time of permanence in the state of freezing) was verified in control groups
(21.2 ± 10.82) when compared to naïve group (0.2 ± 0.2) and Fruticulin A significantly reversed the
clonidine induced freezing (1.5 ± 0.84). Discussion and Conclusion: Open field is a scientific apparatus
used to measure the exploratory activity and emotional behavior in rodents (3). Thus, locomotion and the
number of lifting are related to exploratory activity of animals during the tests and Fruticulin A reversed
the decrease induced by clonidine. These data suggest a potential antidepressant effect of Fruticulin A
with a mechanism related to reduction of catecholamines induced by clonidine. Regarding the
emotionality of animals, our results show that animals treated with Fruticulin A prevented the clonidine
increase anxiety (grooming) and depressive (freezing) like behavior. Treatment with Fruticulin A reverses
these actions suggesting in this way an activity in the central nervous system.
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