Linked Life Data

10837984

Source:http://linkedlifedata.com/resource/pubmed/id/10837984

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2000-7-18
pubmed:abstractText
In search of uterotonic principles, papaya (Carica papaya, Caricaceae) latex extract (PLE) was tested on rat uterine preparations in vitro at various stages of the estrous cycle and gestation periods. Rat uterine contractile activity was remarkably increased by different doses of PLE in proestrus and estrus stages compared to metestrus and diestrus stages of the estrous cycles. The maximum contractile activity of the uterus was observed at the later stages of pregnancy which correspond with the peak level of estrogen in the plasma. A direct dose-dependent spasmodic action with increased frequency and amplitude was observed with PLE in all non-gravid uterine preparations. Pretreatment of the tissue with phenoxybenzamine (PB) non-competitively blocked the effect of PLE. Blocking of the 5-HT receptors with methysergide partially blocked the excitatory response to PLE. Pretreating the tissue with Indomethacin, a cyclo-oxygenase inhibitor, had no effect on the response to PLE. The release of PLE induced mast cell degranulation and subsequent release of heparin, biogenic amines or prostaglandins (PGs) was ruled out by pretreating the tissue with sodium cromoglycate, a mast cell stabilizer. Pure papain induced uterine contractions were not sustained for a longer period and at higher concentrations the receptor proteins were affected by the enzymatic action of papain. From this study it is evident that the crude papaya latex contain a uterotonic principle which might be a combination of enzymes, alkaloids and other substances which can evoke sustained contraction of the uterus acting mainly on the alpha adrenergic receptor population of the uterus at different stages.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0378-8741
pubmed:author
pubmed:issnType
Print
pubmed:volume
70
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
205-12
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Effect of papaya latex extract on gravid and non-gravid rat uterine preparations in vitro.
pubmed:affiliation
Department of Health Sciences, Higher Colleges of Technology Dubai, P.O. Box 16062, Dubai, United Arab Emirates. thomas.cherian@hct.ac.ae
pubmed:publicationType
Journal Article, In Vitro