The preparation of mouse anxiety model

Make the mice anxiety is an important aspect of the preparation of mouse anxiety model, but how to achieve this purpose? Elevated plus-maze test was adopted by the Cloud-Clone Corp.. Elevated plus-maze has a pair of open arms and a pair of close arms. Due to rodents like dark environment, they tend to stay in the close arms. However, rodents will move to open arms because of the characteristic of exploring extraneous environment. In the elevated plus-maze test, the characteristic of exploring extraneous environment and the fear of hung open arms are contradictory, the anxious state of mice were judged by this conflict behavior. Elevated plus-maze is widely used in the study of anxiety.

The next, how to judge whether the preparation of mouse anxiety model is successful? According to the research, when the body lacks gABA, the mouse will be anxiety, restlessness, fatigue, and so on. Glutamic (Glu) is a excitatory amino acids, in the central nervous system, its expression is highest and effect is most widely. Glu involved in many important physiological functions in the brain. Based on the above information, the expression of gABA and Glu in the brain can be used as one of the standard of judgment.

1. Experimental animals: SPF level healthy ICR mice, male, 8 weeks, weight (25±2)g.

2. Main experimental instrument: Elevated plus-maze

3. Experimental group

Group A: blank group with ten mice. Group B: medicated group with ten mice. 2mg diazepam were fed to 1kg mouse a day, and by this analogy.

4. Main reagent

ELISA Kit for Gamma-Aminobutyric Acid (gABA) from Cloud-Clone Corp.. Cat.No. CEA900Ge    

ELISA Kit for Glutamic Acid (Glu) from Cloud-Clone Corp.. Cat.No. CES122Ge

Diazepam tablets 

5. Modeling approach 

The mice in medicated group were given corresponding dose of diazepam tablets by intragastric administration twice a day for seven days. Once in the morning, once in the afternoon. Blank group were given distilled water with the same volume. 10g mice were given by gavage with 50ul solution. Kept mice from eating for 8 hours before the mice were given by gavage in the morning of the eighth day. After forty minutes, elevated plus-maze test was began. Record the mice activities within 5 minutes.

6. Evaluation of the model

6.1 Observation of animal ethology: the number of times that mice enter into the open arms or close arms, the dwell time that mice stay in the open arms or close arms. The less number of times that mice enter into the open arms, the shorter dwell time that mice stay in the open arms, that the anxiety of mice is more serious.

6.2 The expression of gABA and Glu in brain: the concentration of gABA and Glu of medicated group were higher.

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