Insertional Mutation

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2008 ◽  
Vol 48 (3) ◽  
pp. 128-130 ◽  
Author(s):  
Adriana Lasa ◽  
Pia Gallano ◽  
Jaume Colomer ◽  
Montserrat Baiget


Development ◽  
1996 ◽  
Vol 122 (9) ◽  
pp. 2903-2910 ◽  
Author(s):  
T. Rankin ◽  
M. Familari ◽  
E. Lee ◽  
A. Ginsberg ◽  
N. Dwyer ◽  
...  

Mammalian oocytes synthesize and secrete a zona pellucida that surrounds the growing oocytes, ovulated eggs and preimplantation embryos. The extracellular zona matrix is composed of three glycoproteins (ZP1, ZP2, ZP3) that are involved in folliculogenesis, species-specific fertilization, and passage of the early embryo down the oviduct. We have established a mouse line in which Zp3 has been inactivated by homologous recombination with an insertional mutation. Neither Zp3 transcripts nor ZP3 protein was detected in female mice homozygous for the mutation (Zp3−/−), whereas both ZP1 and ZP2 were present in mutant oocytes. Homozygous mutant Zp3−/− mice had follicles with germinal-vesicle-intact oocytes but that lacked a zona pellucida matrix and had a disorganized corona radiata. Although mutant oocytes underwent germinal vesicle breakdown (GVBD) prior to ovulation, the cumulus-oocyte complex was markedly disrupted and the oocytes were often separate from the cumulus cells. After hormone-induced ovulation, cumulus masses were present in the oviducts of homozygous mutant mice, but zona-free eggs were observed in only half of the females and, in these, less than 10% of the normal number [correction of mumber] of eggs were detected. No zona-free 2-cell embryos were recovered from homozygous mutant Zp3−/− female mice after mating with males proven to be fertile, and none became visibly pregnant or produced offspring. These results demonstrate that a genetic defect in a zona pellucida gene causes infertility and, given the conserved nature of the zona pellucida, a similar phenotype is expected in other mammals.



2008 ◽  
Vol 79 (12) ◽  
pp. 1395-1398 ◽  
Author(s):  
C Mauro ◽  
G Giaccone ◽  
G Piscosquito ◽  
A Lavorgna ◽  
M Nigro ◽  
...  


1993 ◽  
Vol 4 (11) ◽  
pp. 639-643 ◽  
Author(s):  
Julie M. Jones ◽  
James T. Elder ◽  
Karl Simin ◽  
Scott A. Keller ◽  
Miriam H. Meisler


Immunology ◽  
2009 ◽  
Vol 127 (2) ◽  
pp. 226-236 ◽  
Author(s):  
Mark Zabel ◽  
Christina Greenwood ◽  
Alana M. Thackray ◽  
Bruce Pulford ◽  
Willem Rens ◽  
...  


Fly ◽  
2017 ◽  
Vol 12 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Derek Dean ◽  
Hannah Weinstein ◽  
Seema Amin ◽  
Breelyn Karno ◽  
Emma McAvoy ◽  
...  


1996 ◽  
Vol 25 (5) ◽  
pp. 608-613 ◽  
Author(s):  
Hideki Aizaki ◽  
Akihiko Saito ◽  
Isao Kusakawa ◽  
Yoshihisa Ashiwara ◽  
Seishi Nagamori ◽  
...  


Neurology ◽  
2000 ◽  
Vol 55 (3) ◽  
pp. 405-410 ◽  
Author(s):  
G. Rossi ◽  
G. Giaccone ◽  
L. Giampaolo ◽  
S. Iussich ◽  
G. Puoti ◽  
...  


1998 ◽  
Vol 12 (11) ◽  
pp. 1651-1660 ◽  
Author(s):  
Shao-Ming Wu ◽  
Karen M. Hallermeier ◽  
Louisa Laue ◽  
Caroline Brain ◽  
A. Caroline Berry ◽  
...  


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