... reported, clonal culture of chondrogenic ectomesenchymal cells at a postmigratory stage but prior to chondrogenic cell condensation has not been reported, nor have cartilage nodules been obtained in clonal culture. We cloned chick mandibular ectomesenchymal cells from HH stage 17 chick embryos. These cells...

...J.S. van Twest; A. Paulsen; B.S. Spooner Chick precardiac tissue explants were cultured on the 8-day mission of STS-60, space shuttle Discovery. Development of in vitro cultures of precardiac chick tissue from embryo stages 5 through 8 (H-H) were initiated during orbit and were terminated after...

...S.M. Oliani; A.P. Girol; R.L. Smith Mast cells are present in the eye of chick embryos from the 14th day onward, displaying metachromatic granules, mainly in the iris anterior surface and pectinate ligament. Ultrastructurally these cells show electron-dense granules and a few thin and short...

... and morphometry. HNK-1-labelled cells advanced rostrocaudally in the gut of quail embryos (to the duodenum by stage HH 21 to the umbilicus by HH 25, to the ceca by HH 27, to the cloaca by HH 33). The timetable in chick embryos appeared to be slightly slower, but neural cells were obscured by background...

... asked whether or not the activities of the E-cadherin gene could cause a definitive embryonic mesenchyme to trans-differentiate into an epithelial phenotype. Primary corneal fibroblasts from 6-to 7-day-old chick embryos were cotransfected by impact loading with plasmids containing E-cadherin and Neor...

... interactions Cell-matrix interactions Epithelio-mesenchymal transformation Heart Myocardial basement membrane Chick Original Paper Acta Anal 1995:154:111-119 A.R. Sinning" C.C. Hewitt R.R Markwaldh Department of Anatomy, University of Mississippi Medical Center. Jackson. Miss., h Department...

... in parathyroid glands connective tissue has apparently been established. However, our previous studies have provided a new hypothesis on the origin of these glands in human and chick embryos. To determine the true origin of the third parathyroid (parathyroid III) gland in the chick embryo, pieces of the third...

... ultrastructural data on these proteins and on their relationships with collagen fibrils and the calcification process. Specimens of woven bone from the upper metaphysis of the tibia of chick embryos were examined after en bloc treatment with acetone solution of KMn0 4 , or aqueous or alcoholic solutions...

...), Buenos Aires, Argentina Key Words Myogenesis Myotome Myoblast Embryo Immunohistochemistry Atrial natriuretic peptide Secretory granules Chick Demonstration of Atrial Natriuretic Peptide Immunoreactivity and Ultrastructurally Related Secretory Granules in Myoblasts of the Chick Myotome Abstract...

...A.S. Chan The ultrastructure of the stromal cells of the thymuses of chick embryos from the 13th to 19th day of incubation was investigated. At the 13th day, the non-lymphoid elements consist mainly of undifferentiated and epithelial cells. The dominant cystic cells are organized to form intra...

...J. Männer; W. Seidl; G. Steding It has been proposed that the cervical flexure of vertebrate embryos arises from the normal morphogenesis of the heart. This hypothesis is based on experiments in which the heart tube is removed or disrupted in early chick embryos. It has been reported...

...Robert LaPorte; Linda M. Fox; Karen Mosher; Sue Binkley; John A. McNulty Day-night differences in the ultrastructure of pineal neuronal elements were quantitated in the rat and the chick – two species that exhibit important differences in adrenergic control of melatonin synthesis. Area densities...

... valves. An atrioventricular septum was also present. Our findings serve to further document the anatomical similarities and differences between the chick and human hearts: (1) the septal leaflet of the human tricuspid valve, similar to the septal microleaflets in the chick, attaches directly...

...A. Quesada; J. Ambrosíani; M.E. Dorado; J.M. Génis-Gálvez On a morphological and ultrastructural level, we studied a thickening which appears on the ascending prolongation of bipolar cells in the chick retina. We first observed this thickening on day 10 of incubation and it remains unchanged...

...José M. Icardo; A. Fernandez-Terán This paper presents a morphologic study of ventricular trabeculation in chick embryo hearts between days 2 and 5 of incubation. Trabeculation appears to be the expression of three closely interrelated events: the formation of endocardial outgrowths that eventually...

...A. Quesada; C. Chmielewski; A. Espinar; J. Ambrosiani; F.A. Prada Ultrastructurally, two different bipolar cell types can be distinguished in the retina of the chick embryo: one pale or electron-lucent and the other dark or electron-dense. The different electron density was seen over the whole cell...

...P. De Paz Cabello; M. Fernandez; C.A. Chamorro; J.G. Fernandez; J.M. Villar The neuroectodermal cells of chick embryos have been analyzed during neurulation by stereological and morphometrical ultrastructural methods in an attempt to describe their cytometric evolution. A profound change...

...A. Espinar; A. Quesada; M. Martinez-de-la-Torre; J.A. Armengol In this work we analyse the effect produced by reserpine on the development of thickness and cell number in the external granular layer in the cerebellum of chick embryo. A striking 48-hour histo genetic delay is observed in the treated...

...M. Arias; J.M. Villar In order to establish the possible relation of the structural characteristics acquired by cardiomyocytes and their functional differentiation (spontaneous contractions), a study of the myofibrillogenesis on chick embryo at Hamburger-Hamilton stage 5 was carried out using...

...J.M. Icardo; J.L. Ojeda The role of microtubules in the early development of the chick embryo heart was studied. The microtubules were disrupted by treatment of the embryos with colchicine. The embryos were divided for study into three groups: (I) before the fusion of the paired cardiac primordia...