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Paper Information

Journal:   SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL   SPRING 2012 , Volume 8 , Number 1 (34); Page(s) 85 To 90.
 
Paper: 

PRIMORDIAL GERM CELL MIGRATION IN SHEEP FETUS

 
 
Author(s):  FATAHIAN DEHKORDI R.A., PARCHAMI A.
 
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Abstract: 

In all vertebrate embryos, certain cells are individual in development and are progenitors of the gametes. These primordial germ cells migrate to the developing gonads and form ovary and testis. The aim of this study was to evaluate primordial germ cells (PGCs) migration in the sheep fetus. Twenty two apparently undifferentiated sheep fetuses were collected from Shahrekord slaughterhouse. The age of the fetuses was determined based on Crown Rump Length (CRL) and they were divided to 4 age groups (with the mean ages of25, 29, 35 and 41 days). 5mm samples were taken and after fixtion in 10% formation, 5~ sections were made and stained. Results showed that the mean number of PGCs was not significantly different between the first two age groups, however the number of these cells showed a statistically significant difference between the third and forth age groups (p<0.05). In first age group primordial germ cells that have large heterochromatin nucleus and increased basophilia of the cytoplasm and cytoplasmic processes were observed in dorsal mesentery migrating towards the genital ridges. In the second age group, undifferentiated gonads were clearly recognizable medial to the mesonephros and only a few numbers of PGCs were observed in the fetal gonads. In third age group, undifferentiated gonads were transformed to the differentiated ones by primordial sex cord formation in which central germ cells were surrounded by peripherally located supporting cells. The process of structural developmental changes of sex cords continued in fourth group and the morphological structure of the gonadal tissue became more differentiated. The present study showed that primordial germ cells in sheep fetuses, has been continued process of migration in 25 day of age and then carry out differentiation process in genital gonads.

 
Keyword(s): PRIMORDIAL GERM CELL, MIGRATION, SHEEP, GENITAL RIDGE
 
 
References: 
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Citations: 
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+ Click to Cite.
APA: Copy

FATAHIAN DEHKORDI, R., & PARCHAMI, A. (2012). PRIMORDIAL GERM CELL MIGRATION IN SHEEP FETUS. SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL, 8(1 (34)), 85-90. https://www.sid.ir/en/journal/ViewPaper.aspx?id=510694



Vancouver: Copy

FATAHIAN DEHKORDI R.A., PARCHAMI A.. PRIMORDIAL GERM CELL MIGRATION IN SHEEP FETUS. SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL. 2012 [cited 2021July30];8(1 (34)):85-90. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=510694



IEEE: Copy

FATAHIAN DEHKORDI, R., PARCHAMI, A., 2012. PRIMORDIAL GERM CELL MIGRATION IN SHEEP FETUS. SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL, [online] 8(1 (34)), pp.85-90. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=510694.



 
 
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