Effect of human follicular fluids from pregnant and nonpregnant patients on the development of mouse zygotes in vitro

1990 ◽  
Vol 7 (1) ◽  
pp. 22-27
Author(s):  
David W. Richards ◽  
Patrick Quinn ◽  
Bronte A. Stone ◽  
Richard P. Marrs
Keyword(s):  
Mouse Zygotes ◽  
Follicular Fluids

scholarly journals Totipotency of mouse zygotes extends to single blastomeres of embryos at the four-cell stage

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Marino Maemura ◽  
Hiroaki Taketsuru ◽  
Yuki Nakajima ◽  
Ruiqi Shao ◽  
Ayaka Kakihara ◽  
...  
Keyword(s):  
Inner Cell Mass ◽  
Cell Mass ◽  
Mouse Embryos ◽  
Primitive Endoderm ◽  
Cell Stage ◽  
Supportive Environment ◽  
Mouse Zygotes ◽  
Single Blastomeres ◽  
Multicellular Organisms

AbstractIn multicellular organisms, oocytes and sperm undergo fusion during fertilization and the resulting zygote gives rise to a new individual. The ability of zygotes to produce a fully formed individual from a single cell when placed in a supportive environment is known as totipotency. Given that totipotent cells are the source of all multicellular organisms, a better understanding of totipotency may have a wide-ranging impact on biology. The precise delineation of totipotent cells in mammals has remained elusive, however, although zygotes and single blastomeres of embryos at the two-cell stage have been thought to be the only totipotent cells in mice. We now show that a single blastomere of two- or four-cell mouse embryos can give rise to a fertile adult when placed in a uterus, even though blastomere isolation disturbs the transcriptome of derived embryos. Single blastomeres isolated from embryos at the eight-cell or morula stages and cultured in vitro manifested pronounced defects in the formation of epiblast and primitive endoderm by the inner cell mass and in the development of blastocysts, respectively. Our results thus indicate that totipotency of mouse zygotes extends to single blastomeres of embryos at the four-cell stage.

Mouse one-cell embryos undergoing a radiation-induced G2 arrest may re-enter S-phase in the absence of cytokinesis

2002 ◽  
Vol 80 (7) ◽  
pp. 618-624 ◽  
Author(s):  
P Jacquet ◽  
J Buset ◽  
J Vankerkom ◽  
S Baatout ◽  
L de Saint-Georges ◽  
...  
Keyword(s):  
Calyculin A ◽  
Embryonic Cells ◽  
G2 Arrest ◽  
Cell Stage ◽  
Chromosome Fragments ◽  
X Irradiation ◽  
Radiation Induced ◽  
Mouse Zygotes ◽  
The One

PCC (premature chromosome condensation) can be used for visualizing and scoring damage induced by radiation in the chromatin of cells undergoing a G1 or G2 arrest. A method involving the fusion of irradiated single embryonic cells with single MI oocytes was used to induce PCC in mouse zygotes of the BALB/c strain, which suffer a drastic G2 arrest after X-irradiation (dose used 2.5 Gy). Other G2-arrested embryos were exposed in vitro to the phosphatase inhibitor calyculin A. Both methods furnished excellent chromosome preparations of the G2-arrested embryos. The mean number of chromosome fragments did not change significantly during G2 arrest, suggesting that zygotes of this strain are unable to repair DNA damage leading to such aberrations. Forty to fifty percent of the irradiated embryos were unable to cleave after G2 arrest and remained blocked at the one-cell stage for a few days before dying. PCC preparations obtained from such embryos suggested that about 30% of them had undergone a late mitosis not followed by cytokinesis and had entered a new DNA synthesis. These results are discussed in the light of recent observations in irradiated human cells deficient in the p53/14-3-3sigma pathway.Key words: PCC, embryo, oocyte, calyculin A, G2 arrest, cytokinesis.

scholarly journals Production of Lysophosphatidic Acids by Lysophospholipase D in Human Follicular Fluids of In Vitro Fertilization Patients1

1999 ◽  
Vol 61 (1) ◽  
pp. 195-199 ◽  
Author(s):  
Akira Tokumura ◽  
Maki Miyake ◽  
Yuko Nishioka ◽  
Shuji Yamano ◽  
Toshihiro Aono ◽  
...  
Keyword(s):  
In Vitro Fertilization ◽  
Vitro Fertilization ◽  
Lysophospholipase D ◽  
Follicular Fluids

Viability of maternally heat-stressed mouse zygotes in vivo and in vitro

2003 ◽  
Vol 74 (3) ◽  
pp. 181-185 ◽  
Author(s):  
Manabu OZAWA ◽  
Yukiko YAMASAKI ◽  
Miho HIRABAYASHI ◽  
Yukio KANAI
Keyword(s):  
Stressed Mouse ◽  
Mouse Zygotes

Some effects of genotype and composition of the culture medium on the development of mouse zygotes in vitro

1993 ◽  
Vol 5 (4) ◽  
pp. 405 ◽  
Author(s):  
ZF Du ◽  
RG Wales
Keyword(s):  
Culture Medium ◽  
Blastocyst Stage ◽  
Blastocyst Development ◽  
Cell Stage ◽  
Reciprocal Crosses ◽  
Maternal Genome ◽  
Zygote Development ◽  
Mouse Zygotes ◽  
Better Than

The effects of EDTA and the presence of glucose and glutamine in CZB medium on the development of mouse zygotes of different genotype were investigated. Although 30-80% of zygotes (depending on the cross) passed the 2-cell stage in EDTA-free medium, the addition of a low concentration of EDTA was necessary in these experiments to obtain blastocysts in culture. In reciprocal crosses between outbred (Qs), inbred (DBA/2) and hybrid (B10D2F1) stock, there was evidence of a strong influence of the maternal genome on zygote development, with those from B10D2F1 females performing best irrespective of sire. A paternal influence on development was also evident but the most successful sire varied with the genotype of female used and reciprocal crosses differed greatly in the ability of the resultant zygote to develop in culture. For zygotes recovered from Qs females, CZB medium containing glucose and glutamine supported development to the blastocyst stage better than did medium devoid of these substrates. Tests with embryos from B10D2F1 females indicated that the presence of glucose for the whole or for part of the incubation period stimulated blastocyst development. However, the addition of glutamine to the medium in these tests had no significant effect on the development of blastocysts.

Development of porcine oocytes from preovulatory follicles of different sizes after maturation in media supplemented with follicular fluids

2000 ◽  
Vol 12 (4) ◽  
pp. 133 ◽  
Author(s):  
Ki-Won Yoon ◽  
Tae-Young Shin ◽  
Jong-Im Park ◽  
Sangho Roh ◽  
Jeong M. Lim ◽  
...  
Keyword(s):  
Blastocyst Stage ◽  
Developmental Potential ◽  
Large Follicle ◽  
In Vitro Development ◽  
Maturation Medium ◽  
Preovulatory Follicles ◽  
Vitro Development ◽  
Small Follicle ◽  
Follicular Fluids

The development of porcine oocytes from large (3.1–8.0 mm in diameter) or small (<3.1 mm) follicles was examined after maturation culture in medium containing porcine follicular fluid (pFF). Large follicles yielded larger (256 m v. 221 m; P<0.05) cumulus–oocyte complexes and more (22 v. 14%) morphologically normal oocytes than small follicles (Experiment 1). In Experiments 2–4, maturation media supplemented with mixed pFF (10%) from small and large follicles was used. More oocytes from large follicles matured (58% v. 91%), formed pronuclei (81% v. 90%) and developed to the blastocyst stage (2% v. 10%) than oocytes from small follicles. In Experiments 5–7, the effects of pFF collected from either small or large follicles on oocyte development were examined. Regardless of the source of oocytes, large-follicle-derived pFF more significantly enhanced preimplantation development than did small-follicle-derived pFF. The highest rate of blastocyst formation (16%) was found when oocytes from large follicles were cultured in maturation medium containing large-follicle-derived pFF. These results suggest that oocytes from large follicles have greater developmental potential than oocytes from small follicles, and that the origin of pFF, which is added to the maturation media, might be an important factor for improving in vitro development of porcine oocytes.

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