Programmed cell death and the morphogenesis of the hindbrain roof plate in the chick embryo

1999 ◽  
Vol 200 (5) ◽  
pp. 509-519 ◽  
Author(s):  
A. Lawson ◽  
Gary C. Schoenwolf ◽  
Marjorie A. England ◽  
Frederick K. Addai ◽  
Rexford S. Ahima
Keyword(s):  
Cell Death ◽  
Chick Embryo ◽  
Programmed Cell Death ◽  
Roof Plate

scholarly journals Regulation of programmed cell death during neural induction in the chick embryo

2011 ◽  
Vol 55 (1) ◽  
pp. 33-43 ◽  
Author(s):  
Anna Gibson ◽  
Neil Robinson ◽  
Andrea Streit ◽  
Guojun Sheng ◽  
Claudio D. Stern
Keyword(s):  
Cell Death ◽  
Chick Embryo ◽  
Programmed Cell Death ◽  
Neural Induction

La morphogenèse du pied de l'embryon de poulet étudiée à l'aide de malformations provoquées par le vert Janus

Development ◽  
1976 ◽  
Vol 35 (3) ◽  
pp. 649-665
Author(s):  
Marie-Paule Pautou
Keyword(s):  
Cell Death ◽  
Single Dose ◽  
Soft Tissue ◽  
Chick Embryo ◽  
Programmed Cell Death ◽  
Apical Growth ◽  
Chick Embryos ◽  
Janus Green

Morphogenesis of the chick embryo foot as studied by Janus green B-induced malformations Janus green was injected into the amnioticsac of 6·5-day-old chick embryos at a single dose of 8·5 or 15 μg; the dye causes respectively 55 and 82 % malformations of the feet. Toes are affected by partial or total soft tissue syndactyly, hypophalangy and infrequently by hyperphalangy. Lateral toes are more severely and more frequently affected by syndactyly and hypophalangy than medium ones. Hyperphalangy is found exclusively in toes I and II and causes the formation of one excess phalanx at most Syndactylous toes are joined by an overdeveloped digital membrane. Hypophalangic toes have a truncated (non-pointed) distaltip. Two phalanges are lacking at most. These malformations are due to two distinct phases of the Janus green action. The first one, which is early and fast, inhibits interdigital programmed cell death, causing in term the non-regression of the inter digital membranes and thus syndactyly. The second one, which is late and slow, blocks the apical growth; this leads to hypophalangy.

scholarly journals Expression of Apogens and Engulfens during Programmed Cell Death in the Nervous System of the Chick Embryo.

1995 ◽  
Vol 58 (2) ◽  
pp. 243-248 ◽  
Author(s):  
Noriko TAKASHITA ◽  
Shunsaku HOMMA ◽  
Rocco J. ROTTELLO ◽  
Pierre-Alan FERNANDEZ ◽  
Junying YUAN ◽  
...  
Keyword(s):  
Cell Death ◽  
Nervous System ◽  
Chick Embryo ◽  
Programmed Cell Death

Specific association of c-Jun-like immunoreactivity but not c-Jun p39 with normal and induced programmed cell death in the chick embryo

1999 ◽  
Vol 38 (2) ◽  
pp. 171-190 ◽  
Author(s):  
Vict�ria Ayala ◽  
C�lia Casas ◽  
Joan Ribera ◽  
Jordi Calder� ◽  
Ronald W. Oppenheim ◽  
...  
Keyword(s):  
Cell Death ◽  
Chick Embryo ◽  
Programmed Cell Death ◽  
Specific Association

scholarly journals Cell population growth regulates dorsalization and caudalization during chick morphogenesis and programmed cell death in lens fibres

2020 ◽  
Vol 64 (1-2-3) ◽  
pp. 45-57
Author(s):  
Sohan Prabhakar Modak
Keyword(s):  
Cell Cycle ◽  
Cell Death ◽  
Chick Embryo ◽  
Programmed Cell Death ◽  
Population Growth ◽  
Cell Population ◽  
Neural Induction ◽  
Egg Yolk ◽  
Rna Sequences ◽  
Cell Population Growth

The chick embryo ectoblast was examined for a possible relationship between the state of neural competence and cell population growth. It was found that although ectoblast cells with doubling times ranging between 5 to 20 h exhibit neural competence, the extent of neutralization induced by the Hensen’s node depends on the duration of the cell cycle; the longer the doubling time of the competent ectoblast, the stronger the induction and the greater the induced neural tissue. Neural induction in the competent ectoblast occurs in at least two steps: the first lasts for 1-2 h of direct contact with the inducing Hensen’s node graft; a contact for another 2 h with even a non-inducing post-nodal fragment is essential to consolidate neutralization. Hensen’s node graft induces mitotic activity in the competent ectoblast in contact. Teratogens which inhibit cell population growth, development and blastoderm expansion in chick embryo gastrula cause concomitant caudalization of the embryonic axis. We confirm Yamada’s hypothesis that dorsalization is under positive mitogenic control, whereas caudalization is controlled by a negative cell cycle regulation. Reverse transcripts of chick gastrula mRNA were cloned in pBR322. Colony hybridization with cDNA made against chicken yolk RNA showed positive clones. Thus chicken yolk contains maternal mRNAs. cDNA made against mRNA extracted from stage 10 foreheads was hybridized with RNA from stage 1 to 13 embryos, 19 day lens and egg yolk. The hybridization signal, which was low between stages 1 to 7, increased between stages 10-13 and decreased thereafter. Forehead cDNA also hybridized to yolk RNA. Thus, maternal RNA sequences are present in the early chick embryo. During lens development, epithelial cells retain proliferative activity and their progeny reaching a stationary phase join the fibre area and contribute to the growth of fibre cells. The rate of transfer from epithelium to fibre regulates the rate of programmed cell death of the non-dividing differentiated lens fibre cells.

scholarly journals Opposing Effects of Excitatory Amino Acids on Chick Embryo Spinal Cord Motoneurons: Excitotoxic Degeneration or Prevention of Programmed Cell Death

1999 ◽  
Vol 19 (24) ◽  
pp. 10803-10812 ◽  
Author(s):  
Jerònia Lladó ◽  
Jordi Calderó ◽  
Joan Ribera ◽  
Olga Tarabal ◽  
Ronald W. Oppenheim ◽  
...  
Keyword(s):  
Amino Acids ◽  
Spinal Cord ◽  
Cell Death ◽  
Chick Embryo ◽  
Programmed Cell Death ◽  
Excitatory Amino Acids ◽  
Opposing Effects
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