Linked Life Data

12737501

Source:http://linkedlifedata.com/resource/pubmed/id/12737501

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2003-5-9
pubmed:abstractText
We have been in search of an alternate species for the monkey to study the effects of drugs on the I-type photopic electroretinogram (ERG) response that is typically seen in the cone-rich retina of the primate. The guinea pig has two types of cones, one of which contains a middle-wavelength sensitive pigment otherwise found only in Old World primates. We studied the Ganzfeld electroretinogram (ERG) of the guinea pig in relation to monkey and rat ERGs to learn whether the guinea pig might be a good animal model to study the 'primate-like' cone ERG. The guinea pig scotopic ERG was similar to other mammal ERGs and was not electronegative when fully dark-adapted. We saw no evidence of a negative-going scotopic threshold response (STR). The guinea pig photopic ERG a-wave is larger than that of the rat but much smaller than the primate a-wave, and it lacked a phasic d-wave. PDA eliminated guinea pig photopic a-wave and caused the OFF-response to long stimuli to invert polarity, as seen in monkey but not in rat. The guinea pig overall shows a weak I-type response and may be a useful substitute for primate in some studies of the photopic ERG.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0012-4486
pubmed:author
pubmed:issnType
Print
pubmed:volume
106
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
243-9
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
The ERG of guinea pig (Cavis porcellus): comparison with I-type monkey and E-type rat.
pubmed:affiliation
Department of Ophthalmology and Visual Science, W.K. Kellogg Eye Center, University of Michigan, Ann Arbor, MI 65211, USA. leib@missouri.edu
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't