Cell-specific variation of X chromosome replication in the Syrian hamster (Mesocricetus auratus)

Chromosoma ◽  
1981 ◽  
Vol 84 (3) ◽  
pp. 365-372 ◽  
Author(s):  
A. H. Cawood
Keyword(s):  
X Chromosome ◽  
Syrian Hamster ◽  
Mesocricetus Auratus ◽  
Chromosome Replication ◽  
Specific Variation

Age-related and photoperiodic variation of the DAZ gene family in the testis of the Syrian hamster (Mesocricetus auratus)

Zygote ◽  
2018 ◽  
Vol 26 (2) ◽  
pp. 127-134 ◽  
Author(s):  
Candela Rocío González ◽  
Luciana Moverer ◽  
Ricardo Saúl Calandra ◽  
Silvia Inés González-Calvar ◽  
Alfredo Daniel Vitullo
Keyword(s):  
Protein Expression ◽  
Gene Family ◽  
Syrian Hamster ◽  
Mesocricetus Auratus ◽  
Cell Number ◽  
The Novel ◽  
Age Related ◽  
Mrna And Protein Expression ◽  
Long Photoperiod ◽  
Daz Gene

SummaryThe Deleted in AZoospermia (DAZ) gene family regulates the development, maturation and maintenance of germ cells and spermatogenesis in mammals. The DAZ family consists of two autosomal genes, Boule and Dazl (Daz-like), and the Daz gene on chromosome Y. The aim of this study was to analyze the localization of DAZL and BOULE during testicular ontogeny of the seasonal-breeding Syrian hamster, Mesocricetus auratus. We also evaluated the testicular expression of DAZ family genes under short- or long-photoperiod conditions. In the pre-pubertal and adult testis, DAZL protein was found mainly in spermatogonia. BOULE was found in the spermatogonia from 20 days of age and during the pre-pubertal and adult period it was also detected in spermatocytes and round spermatids. DAZL and BOULE expression in spermatogonia was strictly nuclear only in 20-day-old hamsters. We also detected the novel mRNA and protein expression of BOULE in Leydig cells. In adult hamsters, Dazl expression was increased in regressed testis compared with non-regressed testis and DAZL protein expression was restricted to primary spermatocytes in regressed testis. These results show that DAZL and BOULE are expressed in spermatogonia at early stages in the Syrian hamster, then both proteins translocate to the cytoplasm when meiosis starts. In the adult regressed testis, the absence of DAZL in spermatogonia might be related to the decrease in germ cell number, suggesting that DAZ gene family expression is involved in changes in seminiferous epithelium during photoregression.

scholarly journals Spontaneous glomerular basement membrane changes in the golden Syrian hamster (Mesocricetus auratus): a light and electron microscope study

1978 ◽  
Vol 12 (4) ◽  
pp. 207-211 ◽  
Author(s):  
E. A. E. Van Marck ◽  
W. Jacob ◽  
A. M. Deelder ◽  
P. L. J. Gigase
Keyword(s):  
Electron Microscope ◽  
Basement Membrane ◽  
Glomerular Basement Membrane ◽  
Syrian Hamster ◽  
Microscope Study ◽  
Electron Microscope Study ◽  
Mesocricetus Auratus ◽  
Golden Syrian Hamster ◽  
Membrane Changes ◽  
Apparently Healthy

Changes in apparently healthy hamsters, consistent with proteinuria, are reported, but no IgG deposits or amyloid in the glomeruli were detected. Further investigation is required into the significance and the aetiology of these, as yet, obscure alterations.

New Embryological Evidence for the Formation of Quadricuspid Aortic Valves in the Syrian Hamster (Mesocricetus auratus)

1999 ◽  
Vol 121 (1) ◽  
pp. 89-94 ◽  
Author(s):  
B. Fernández ◽  
A.C. Durán ◽  
A. Martire ◽  
D. López ◽  
V. Sans-Coma
Keyword(s):  
Syrian Hamster ◽  
Mesocricetus Auratus ◽  
Aortic Valves

The coronary arteries of the Syrian hamster, Mesocricetus auratus (Waterhouse 1839)

1993 ◽  
Vol 175 (1) ◽  
pp. 53-57 ◽  
Author(s):  
V. Sans-Coma ◽  
J.M. Arqué ◽  
A.C. Durán ◽  
M. Cardo ◽  
B. Fernández ◽  
...  
Keyword(s):  
Coronary Arteries ◽  
Syrian Hamster ◽  
Mesocricetus Auratus

scholarly journals Hamster Polyomavirus Infection in a Pet Syrian Hamster (Mesocricetus auratus)

2001 ◽  
Vol 38 (4) ◽  
pp. 441-446 ◽  
Author(s):  
J. H. Simmons ◽  
L. K. Riley ◽  
C. L. Franklin ◽  
C. L. Besch-Williford
Keyword(s):  
Syrian Hamster ◽  
Mesocricetus Auratus ◽  
Hamster Polyomavirus

X-chromosome replication patterns in adult, newborn and prenatal opossums

1994 ◽  
Vol 6 (4) ◽  
pp. 533 ◽  
Author(s):  
ES Robinson ◽  
PB Samollow ◽  
JL VandeBerg ◽  
PG Johnston
Keyword(s):  
X Chromosome ◽  
Developmental Stages ◽  
Organizer Region ◽  
Nucleolar Organizer Region ◽  
Chromosome Complement ◽  
Nucleolar Organizer ◽  
Chromosome Replication ◽  
Monodelphis Domestica ◽  
Molecular Techniques ◽  
Didelphis Virginiana

Somatic cells from the opossums Monodelphis domestica and Didelphis virginiana were labelled with 5-bromodeoxyuridine (BrdU), treated with colchicine, stained with acridine orange and examined using fluorescence microscopy. BrdU-incorporated metaphase spreads from females of M. domestica at developmental stages from late bilaminar blastocysts to adults showed replication asynchrony of the two (acrocentric) X chromosomes. The long arm of one X chromosome was the latest replicating region in the entire chromosome complement and is presumed to represent transcriptional inactivation and X dosage compensation. The minute short arm of the same X, which contains a nucleolar organizer region, was earlier replicating and synchronous with the short arm of its homologue and is thus assumed to escape inactivation. BrdU-incorporated spreads from cells of fetuses, neonates and adults of D. virginiana also showed a late replicating (submetacentric) X chromosome. The pattern was different from that of M. domestica because of the different morphology and the presence of large blocks of constitutive heterochromatin in both homologues. The timing and pattern of replication of the single X in males of both species resembled the earlier replicating X in females. The array of molecular techniques now available offers the best means for investigating X-chromosome replication and activity states of X-linked genes in the earliest stages of marsupial embryogenesis.

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