PubMed Health⌕ Search

Biomedical subjects

H D Everist

Publications and source records attributed to H D Everist.

3 recordsLinked to original sources

Psychotherapeutic Medications Development Program (PMDP).

The Psychotherapeutic Medications Development Program (PMDP) of the National Institute of Mental Health was established in 1990. The purpose of the PMDP is to improve, enhance, and speed the development of new medications and improve the therapeutic usefulness of existing medications for the treatment of mental illness. The PMDP will fulfill this mission by implementing four initiatives. In the drug discovery and development initiative, the PMDP will aid in the development of promising new drugs. This initiative will also include improving the therapeutic usefulness of existing medications. In the technology transfer initiative, PMDP will improve the technology transfer from academic and government researchers to the pharmaceutical industry; improve the dissemination of information concerning technology transfer opportunities as it pertains to psychotherapeutic medications; and enhance technology transfer by acting as a broker to bring interested parties together. For the third initiative, the PMDP will develop and maintain a capability to clinically evaluate psychotherapeutic medications. The PMDP will also act to facilitate the development and testing of new concepts and models of mental illness. There is a detailed description of the steps that are involved in developing a new chemical entity (NCE) from the conceptual stage to a medication that is approved for the treatment of a particular illness. The pharmaceutical industry estimates that this medication development process costs $238 million.

Humans↗

Comparative localization of neurotensin receptors on nigrostriatal and mesolimbic dopaminergic terminals.

Neurotensin (NT), a brain-gut peptide, possesses many biological actions similar to those reported for neuroleptics. Moreover, it has been shown that NT alters dopaminergic activity of both nigrostriatal and mesolimbic pathways. We now report that NT receptors are located on dopaminergic cell bodies in both systems. However, the proportion of NT receptors on presynaptic dopaminergic terminals appears to be different. NT receptor sites are mainly found on presynaptic dopaminergic terminals in the caudate-putamen while they are pre- and post-synaptically located in the nucleus accumbens and the olfactory tubercule. NT receptors differential localization in these two pathways could be used as a model to study the comparative physiology of various dopaminergic brain systems.

Animals↗

Changes in local cerebral glucose utilization during rewarding brain stimulation.

The quantitative 2-deoxy[14C]glucose method was used to determine local cerebral glucose utilization in unrestrained rats responding (lever-press) for rewarding electrical stimulation to area A10 (ventral tegmental area) and in similarly implanted inactive controls. Self-stimulation was associated with significant increases in metabolic activity, highly circumscribed in the ventral tegmental area, that continued rostrally within a rather compact zone of activity through the medial forebrain bundle, extending via the diagonal band of Broca to the level of the preoptic area. In the forebrain terminal areas bilateral increases in local cerebral glucose utilization were noted in the nucleus accumbens, lateral septum, hippocampus, and the mediodorsal nucleus of the thalamus. Ipsilateral (i.e., side of stimulation) increases in glucose utilization were noted in the bed nucleus of the stria terminalis, the basolateral and central amygdaloid nuclei, and the medial prefrontal cortex. Caudal to the stimulation site, increases in glucose utilization were found in the midline dorsal raphe, the ipsilateral pontine gray, medial parabrachial nucleus, and the locus coeruleus. Significant bilateral increases were noted in various sensory and motor areas. These results indicate that rather than a diffuse pattern of activity, rewarding brain stimulation is associated with discrete activation of specific neuronal projection fibers and selective terminal sites.

Animals↗