Linked Life Data

8891305

Source:http://linkedlifedata.com/resource/pubmed/id/8891305

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1997-2-6
pubmed:abstractText
A beneficial effect of sigma (sigma) agonists was previously described on several pharmacological models of learning impairments. We examined this effect in senescence-accelerated mice (SAM), which has been developed as a murine model of aging and cognitive dysfunction. SAMP8/Ta (P8, senescence-prone substrain), 10-12 months of age, showed significant impairments in mnemonic capacities, as compared to age-matched SAMR1/Ta controls (R1, senescence-resistant substrain). Tests included open-field behavior, spontaneous alternation performances in the Y-maze, step-down passive avoidance and place learning after repetitive training in a water-maze. Pretreatment with the sigma agonists JO-1784 (igmesine) or PRE-084, at 0.1-3 mg/kg, s.c., significantly improved spontaneous alternation and passive avoidance performances in P8. JO-1784 or PRE-084, at 1 mg/kg, also improved place learning in the water-maze, and retention, in term of escape latency. The implication of sigma sites was indicated by the lack of significant effect of JO-1783, the inactive enantiomer of JO-1784, and by the ability of BMY-14802 (5 mg/kg, i.p.) to antagonize the effects on passive avoidance of JO-1784 (0.5 mg/kg) or PRE-084 (1 mg/kg). Subchronic treatments with JO-1784 (0.5 mg/kg/day) or PRE-084 (1 mg/kg/day) during 10 days, allowed a significant improvement of learning during training in the water-maze, but retention was not significantly ameliorated. These results confirmed the interest of the SAM substrains as an experimental model for senile memory impairment and showed that sigma agonists could improve the quality of learning, although they seem less effective on long-term memory retrieval upon chronic administration.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/2-(4-morpholino)ethyl-1-phenylcycloh..., http://linkedlifedata.com/resource/pubmed/chemical/Anti-Anxiety Agents, http://linkedlifedata.com/resource/pubmed/chemical/Antipsychotic Agents, http://linkedlifedata.com/resource/pubmed/chemical/Cinnamates, http://linkedlifedata.com/resource/pubmed/chemical/Cyclopropanes, http://linkedlifedata.com/resource/pubmed/chemical/Morpholines, http://linkedlifedata.com/resource/pubmed/chemical/Phenazocine, http://linkedlifedata.com/resource/pubmed/chemical/Pyrimidines, http://linkedlifedata.com/resource/pubmed/chemical/Receptors, sigma, http://linkedlifedata.com/resource/pubmed/chemical/SK&F 10047, http://linkedlifedata.com/resource/pubmed/chemical/alpha-(4-fluorophenyl)-4-(5-fluoro-2..., http://linkedlifedata.com/resource/pubmed/chemical/igmesine
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0006-8993
pubmed:author
pubmed:issnType
Print
pubmed:day
16
pubmed:volume
733
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
219-30
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Beneficial effects of sigma agonists on the age-related learning impairment in the senescence-accelerated mouse (SAM).
pubmed:affiliation
INSERM U336, Développement, Plasticité et Vieillissement du Système Nerveux, Ecole Nationale Supérieure de Chimie, Montpellier, France. maurice@cit.enscm.fr
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't