[Nerve growth factor system in health and disease].

The biological effects of nerve growth factors (NGF) against the cells of the nervous, endocrine, and immune systems and the possible role of protein as an integral component of molecular communications between the above systems are studied. Based on analysis of the author's own findings, it is suggested that the impairment of regulatory mechanisms which is typical of the pathogenesis of some nervous and mental diseases is caused by diseases or at least accompanied by changes in the NGF system.