Linked Life Data

8331370

Source:http://linkedlifedata.com/resource/pubmed/id/8331370

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
1993-8-13
pubmed:abstractText
The neurotrophic factor concept in its basic form envisages that innervated tissues produce a signal for the innervating neurons for the selective limitation of neuronal death occurring during development (Purves, 1986; Oppenheim, 1991). This concept arose several decades ago on the basis of the observation that experimental manipulation of the amount of target tissue could modulate the size of neuronal populations. By making the survival of neurons dependent on their target, nature would provide a means to match neuron and target cell populations. NGF, discovered in the 1950s, represents the first known molecular realization of the neurotrophic factor concept. NGF was found to regulate survival, neurite growth, and neurotransmitter production of a particular neuronal type, the sympathetic neurons of the PNS. NGF produced by target cells is specifically bound and internalized by sympathetic neurons, followed by retrograde axonal transport of NGF to the cell soma, where NGF exerts its effects via the cotransported receptor molecule (Levi-Montalcini, 1987; Thoenen et al., 1987). Strictly speaking, increased neurite growth and neurotransmitter production are not trophic effects; however, I will use the term "neurotrophic" in the extended meaning of enhancing neuronal differentiation as well as neuronal survival. It was expected that these results could be generalized to a model of multiple, mutually independent, retrograde trophic messengers, which are synthesized in distinct target areas and act on restricted neuronal types (Fig. 1). This assumption leads to a conceptually simple way to arrange and maintain a variety of neuronal subsystems. One might call this a modular approach to the construction of the nervous system. The hypothesis of multiple retrograde signals has gained widespread experimental support in recent years. Originally proposed for the PNS, the model could be extended to the CNS, in which target neurons synthesize trophic factors for their afferent neurons (Ernfors et al., 1990b). In addition to NGF, a family of NGF-related molecules (now commonly called neurotrophins), which are thought to exert retrograde trophic influences (DiStefano et al., 1992), has been identified.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0270-6474
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2739-48
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
The neurotrophic factor concept: a reexamination.
pubmed:affiliation
Max-Planck-Institut für Entwicklungsbiologie, Abteilung Physikalische Biologie, Tübingen, Germany.
pubmed:publicationType
Journal Article, Review