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- W2012040988 abstract "Specification of bilateral cardiac primordia and formation of the linear heart tube are highly conserved from Drosophila to humans. However, subsequent heart morphogenesis involving nonmesodermal neural crest cells was thought to be specific for vertebrates. Here, we provide evidence that a group of nonmesodermal cells that we have named heart-anchoring cells (HANCs) contribute to heart morphogenesis in Drosophila. We show that the homeobox genes ladybird (lb) known to be involved in diversification of cardiac precursors are expressed in HANCs and required for their specification. Interestingly, the HANCs selectively contact the anterior cardiac cells, which express lb as well. Direct interaction between HANCs and cardiac cells is assisted by a pair of cardiac outflow muscles (COMs), each of which selectively attaches to both the lb-expressing cardiac cells and HANCs. COM muscles seem to ensure ventral bending of the heart tip and together with HANCs determine the spatial positioning of the cardiac outflow region. Experimentally depleted cardiac lb expression leads to the disruption of the contact between the tip of the heart and either the COM muscles or the HANC cells, indicating a pivotal morphogenetic role for the lb expression within the heart." @default.
- W2012040988 created "2016-06-24" @default.
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- W2012040988 date "2003-09-30" @default.
- W2012040988 modified "2023-09-23" @default.
- W2012040988 title "Patterning of the cardiac outflow region in <i>Drosophila</i>" @default.
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- W2012040988 doi "https://doi.org/10.1073/pnas.2133156100" @default.
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