The hLAMP-1-Positive Particulate Matrix Involved in Cardiac Mesenchyme Formation in the Chick Does Not Include BMP-2

2013 ◽  
Vol 198 (5) ◽  
pp. 338-348 ◽  
Author(s):  
Tarek Hamdy Abd-Elhamid ◽  
Marianne L. Conway ◽  
Allan R. Sinning
Keyword(s):  
Particulate Matrix ◽  
Cardiac Mesenchyme

scholarly journals Chick embryo particulate matrix involved in cardiac mesenchyme formation does not include BMP‐2

2013 ◽  
Vol 27 (S1) ◽  
Author(s):  
Tarek Hamdy Abd‐Elhamid ◽  
Marianne L. Conway ◽  
Allan R Sinning
Keyword(s):  
Chick Embryo ◽  
Particulate Matrix ◽  
Cardiac Mesenchyme

Mechanisms of epibolic tissue spreading analyzed in a model morphogenetic system. Roles for cell migration and tissue contractility

1992 ◽  
Vol 102 (2) ◽  
pp. 373-385 ◽  
Author(s):  
M.T. Armstrong ◽  
P.B. Armstrong
Keyword(s):  
Extracellular Matrix ◽  
Chick Embryo ◽  
Epithelial Tissue ◽  
Cortical Cells ◽  
Culture Model ◽  
Retinal Epithelium ◽  
Core Tissue ◽  
Mesenchyme Cells ◽  
Cardiac Mesenchyme ◽  
System 1

The processes responsible for epithelial spreading during wound healing and embryonic morphogenesis were investigated in an organ culture model in which an epithelial tissue (chick embryo pigmented retinal epithelium) spread over the surface of an aggregate of mesenchyme cells (chick embryo cardiac mesenchyme). The heart mesenchyme aggregate is differentiated into a core of stellate cells associated with a fibronectin-poor matrix surrounded by a cortical zone, 2–5 cells in thickness, of flattened cells embedded in a fibronectin-rich extracellular matrix. Envelopment of the mesenchyme aggregate is accompanied by a movement of the cells and the fibronectin-rich extracellular matrix of the cortex over the core tissue in advance of the spreading pigmented retina tissue. Three distinct processes were identified as contributing to epithelial spreading in this system: (1) active migration of the pigmented retinal epithelium; (2) active contraction of the cortical cells of the mesenchyme aggregate to tow the attached epithelial tissue over the mesenchyme aggregate; and (3) ingression of surface-located cells of the mesenchyme aggregate to decrease the exposed surface area by decreasing the number of cells at the surface.

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