Xenopus Heterochronic Presumptive Primordial Germ Cells (pPGCs) Implanted in the Correct Position in Host Neurula Embryos can Differentiate into PGCs. (Xenopus laevis, PGCs/heterochronic presumptive PGCs/explant/germ plasm-bearing cells)
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چکیده
منابع مشابه
An autoradiographic analysis of nucleic acid synthesis in the presumptive primordial germ cells of Xenopus laevis.
Microinjection of [3H]thymidine into Xenopus laevis embryos between late blastula (stage 10) and early tadpole (stage 44) showed that the presumptive primordial germ cells synthesis DNA between stages 10-33. The percentage of labelled cells was highest between stages 10 and 16, declined sharply between stages 22 and 26 and rose again between stages 26 and 33. The fluctuations in the labelling p...
متن کاملXpat, a gene expressed specifically in germ plasm and primordial germ cells of Xenopus laevis
cDNAs specific to vegetal poles of Xenopus gastrula embryos were used as a probe to screen a gastrula vegetal pole cDNA library. One of the novel clones isolated had an RNA expression pattern consistent with it being a component of germ plasm and it was thus named Xpat (Xenopus primordial germ cell associated transcript). The open reading frame encodes a 35 kDa protein with no clear homologies....
متن کاملCytological analyses of factors which determine the number of primordial germ cells (PGCs) in Xenopus laevis.
Correlation of the number of primordial germ cells (PGCs) at stage 47 with the amount of germ plasm at the 8-cell stage and with the number of the germ-plasm-containing cells (GPCCs) was analysed using two different laboratory-raised colonies of Xenopus laevis, HD and J groups. The average number of PGCs in J group tadpoles was significantly larger than that in HD group tadpoles. The amount of ...
متن کاملThe effect of u.v. irradiation of the vegetal pole of Xenopus laevis eggs on the presumptive primordial germ cells.
The initial effect of u.v. irradiation of the vegetal pole was to inhibit cleavage in the vegetal hemisphere although karyokinesis was not substantially affected. In this way a syncytium formed in the vegetal hemisphere which broke down into individual cells some time between morula and late blastula. The movement of the germ plasm from the peripheral cortical regions into the interior of the e...
متن کاملTransfer of Primordial Germ - cells in Xenopus laevis
THERE have been many claims for the segregation of Anuran primordial germcells at an early embryonic stage. Most authors agree that these cells may be distinguished with ease in the most dorsal region of the larval endoderm and, somewhat later in development, at the base of the dorsal mesentery and in the undifferentiated gonad (see review by Johnston, 1951). Bounoure (1934) and Blackler (1958)...
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ژورنال
عنوان ژورنال: Development, Growth and Differentiation
سال: 1993
ISSN: 0012-1592,1440-169X
DOI: 10.1111/j.1440-169x.1993.00439.x