Rhythmicity and synchronicity in uterine smooth muscle

Funding Activity

Website
http://purl.org/au-research/grants/nhmrc/455570

Funding Status
Closed

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Funded Activity Summary

Natural birth occurs through rhythmic contractions of the smooth muscle of the uterus. There is surprisingly little understanding of the mechanism of the pacemaker clock that both initiates and times each contraction in a coordinated manner to expel the fetus. This project is to challenge this knowledge gap using our findings on cellular rhythms that herald Ca2+ stores as a major pacemaker mechanism. First, we will use electrophysiology and calcium imaging techniques to test the hypothesis that rhythmicity and synchronicity of uterine contractions are underpinned by store pacemaking. Second, we will probe the role of current spread between cells via gap junctions as a mechanism of recruitment and will examine whether accessory cells termed interstitial cells subserve a role in pacemaking. These cells are present within the uterine wall but their function is unknown. We will probe their ion channel properties in relation to pacemaking using patch clamp techniques. Third, we will examine the role of labour hormones, such as oxytocin, in augmenting uterine contractions via interaction with the Ca2+ store mechanism and cell recruitment. These studies will provide new and fundamental insights into uterine pacemaking, an outcome that should be of great significance to understanding and better controlling birth-associated complications such as preterm delivery and failure to progress.

Funded Activity Details

Start Date: 01-01-2007

End Date: 01-01-2009

Funding Scheme: NHMRC Project Grants

Funding Amount: $291,823.00

Funder: National Health and Medical Research Council

Research Topics

ANZSRC Field of Research (FoR)

Pharmacology and Pharmaceutical Sciences

ANZSRC Socio-Economic Objective (SEO)

There are no SEO codes available for this funding activity

Other Keywords

birth | calcium imaging | contraction | dysfunctional labour | electrophysiology | ion channels | pacemaking | preterm labour | uterine contractions | uterus

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