Developmental expression of galanin-like immunoreactivity by members of the avian sympathoadrenal cell lineage

1999 ◽  
Vol 295 (1) ◽  
pp. 33-41 ◽  
Author(s):  
José E. García-Arrarás ◽  
Ilia Torres-Avillán ◽  
J. E. García Arrarás
2001 ◽  
Vol 116 (3) ◽  
pp. 255-262 ◽  
Author(s):  
S. Barkatullah ◽  
K. Pogue ◽  
J. Depreitere ◽  
A. Boutajangout ◽  
F. Liang ◽  
...  

2016 ◽  
Vol 365 (2) ◽  
pp. 225-232 ◽  
Author(s):  
Stella Shtukmaster ◽  
Priyanka Narasimhan ◽  
Tehani El Faitwri ◽  
Jutta Stubbusch ◽  
Uwe Ernsberger ◽  
...  

Genetics ◽  
1990 ◽  
Vol 124 (4) ◽  
pp. 873-880 ◽  
Author(s):  
D L Cox-Foster ◽  
C P Schonbaum ◽  
M T Murtha ◽  
D R Cavener

Abstract The Gld gene of Drosophila melanogaster is transiently expressed during every stage of development. The temporal pattern of Gld expression is highly correlated with that of ecdysteroids. Exogeneous treatment of third instar larvae with 20-hydroxyecdysone induces the accumulation of Gld mRNA in the hypoderm and anterior spiracular gland cells. During metamorphosis Gld is expressed in a variety of tissues derived from the ectoderm. In the developing reproductive tract, Gld mRNA accumulates in the female spermathecae and oviduct and in the male ejaculatory duct and ejaculatory bulb. These four organs are derived from closely related cell lineages in the genital imaginal disc. Since the expression of Gld is not required for the development of these reproductive structures, this spatial pattern of expression is most likely a fortuitous consequence of a shared regulatory factor in this cell lineage. At the adult stage a high level of the Gld mRNA is only observed in the male ejaculatory duct.


2000 ◽  
Vol 149 (5) ◽  
pp. 1019-1026 ◽  
Author(s):  
Lucio Gnessi ◽  
Sabrina Basciani ◽  
Stefania Mariani ◽  
Mario Arizzi ◽  
Giovanni Spera ◽  
...  

Platelet-derived growth factor (PDGF)- A–deficient male mice were found to develop progressive reduction of testicular size, Leydig cells loss, and spermatogenic arrest. In normal mice, the PDGF-A and PDGF-Rα expression pattern showed positive cells in the seminiferous epithelium and in interstitial mesenchymal cells, respectively. The testicular defects seen in PDGF-A−/− mice, combined with the normal developmental expression of PDGF-A and PDGF-Rα, indicate that through an epithelial-mesenchymal signaling, the PDGF-A gene is essential for the development of the Leydig cell lineage. These findings suggest that PDGF-A may play a role in the cascade of genes involved in male gonad differentiation. The Leydig cell loss and the spermatogenic impairment in the mutant mice are reminiscent of cases of testicular failure in man.


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