Depression constitutes an international health problem. It is estimated that 320 million people worldwide are clinically depressed. Effective antidepressant treatments have been available for more than 40 years. Although modern antidepressants lack many of the side-effects and toxicity of the first generation tricyclics and monoamine oxidase inhibitors, their efficiency has not been substantially improved comparing to older agents. Unfortunately, the modern drug discovery technologies of combinatorial chemistry and throughput screening are based on relatively simple in vitro assays and lack pre-clinical model of depression make this research difficult. Most antidepressants require additional time to achieve therapeutic effects and there is ...