Linked Life Data

2548205

Source:http://linkedlifedata.com/resource/pubmed/id/2548205

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
16
pubmed:dateCreated
1989-9-19
pubmed:abstractText
The presence of opioid neuropeptides was shown to stimulate conformational changes and locomotory activity in immunocytes of two representatives of invertebrates as well as in human leukocytes. Cells were examined by use of phase-contrast and Nomarski optics coupled with a Zeiss Axiophot microscope, and of the Zeiss Videoplan/Vidas Image Analysis system. Immunocompetent blood cells, activated by exogenous opioids or stressful stimuli presumed to engage endogenous opioids, showed flattening, elongation, and formation of pseudopodia. In the mollusc Mytilus edulis, ameboid movements resulted in the formation of cell clusters, an activity not observed in untreated controls, or in immunocytes simultaneously exposed to opioid and naloxone. Tests with nine immunoreactive substances revealed immunocyte stimulation by delta, mu-, kappa-, and epsilon(?)-selective ligands. One of these, [D-Ala2,D-Met5]enkephalinamide (DAMA), active at a concentration of 10 pM, proved to be considerably more effective than the rest. The high pharmacological potency of DAMA, observed in both human and invertebrate immunocytes, sets this opioid apart from the closely related [D-Ala2,D-Leu5]enkephalin, a discrepancy not occurring in the mammalian nervous system. This suggests a specific function for [Met]enkephalin in immunoregulation, mediated perhaps by a special subtype of delta receptor.
pubmed:grant
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0027-8424
pubmed:author
pubmed:issnType
Print
pubmed:volume
86
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
6307-11
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Stimulatory effects of opioid neuropeptides on locomotory activity and conformational changes in invertebrate and human immunocytes: evidence for a subtype of delta receptor.
pubmed:affiliation
Multidisciplinary Center for the Study of Aging, State University of New York/College, Old Westbury 11568.
pubmed:publicationType
Journal Article, Comparative Study, In Vitro, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't