Document Detail


Effect of the oestrous cycle, pregnancy and uterine region on the responsiveness of the isolated mouse uterus to prostaglandin F(2alpha) and the thromboxane mimetic U46619.
MedLine Citation:
PMID:  16522736     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Previous studies in this laboratory have suggested that the isolated uterus from non-pregnant mice has a prostaglandin F and a thromboxane receptor population similar to that found in human myometrium. The aim of this study was to investigate any regional variation in myogenic activity ) and the and responsiveness to prostaglandin F(2alpha) (PGF(2alpha) thromboxane mimetic U46619 in the mouse uterus taken during different stages of the oestrous cycle and during pregnancy. Uterine samples from BKW mice were taken from different anatomical segments along the length of each uterine horn and set up for superfusion at 2 ml/min with Krebs solution (containing 1 microM indometacin) at 37 degrees C, and gassed with 95%O(2)/5%CO(2). Responses (area under the curve) are expressed as a percentage of the final contraction induced by hypotonic shock. Data are expressed as the means +/- s.e.m. of n=5-12 and were analysed using Student's paired t-test or two-way ANOVA with a Bonferroni post hoc test. Regional variation in myogenic activity was observed in all tissues studied except those taken during labour. These tissues displayed significantly greater myogenic activity than tissues taken at late gestation and at all stages of the oestrous cycle. Tissues from pregnant animals were generally more responsive to U46619 and PGF(2alpha) than tissues taken from non-pregnant animals. Tissues taken from the upper segment of the uterine horn were more responsive to both agonists during the oestrous cycle. The findings demonstrated that the hormonal milieu and site of excision are important for myogenic activity and responsiveness.
Authors:
A L Griffiths; K M Marshall; J Senior; C Fleming; D F Woodward
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Publication Detail:
Type:  Comparative Study; In Vitro; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of endocrinology     Volume:  188     ISSN:  0022-0795     ISO Abbreviation:  J. Endocrinol.     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-03-08     Completed Date:  2006-05-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375363     Medline TA:  J Endocrinol     Country:  England    
Other Details:
Languages:  eng     Pagination:  569-77     Citation Subset:  IM    
Affiliation:
School of Pharmacy, University of Bradford, Bradford, West Yorkshire BD7 1DP, UK.
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MeSH Terms
Descriptor/Qualifier:
15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid / pharmacology*
Animals
Dinoprost / pharmacology*
Electromyography
Estrous Cycle
Female
Labor, Obstetric
Mice
Mice, Inbred Strains
Pregnancy
Thromboxanes / agonists*
Uterine Contraction / drug effects*
Uterus / anatomy & histology,  drug effects,  physiology*
Chemical
Reg. No./Substance:
0/Thromboxanes; 551-11-1/Dinoprost; 76898-47-0/15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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