Abstract
Thymocytes of human embryos at the 7–8-week stage have irregularly shaped nuclei with one to three distinct nucleoli, characterized by absence of compact chromatin or heterochromatin. The electron-dense cytoplasm of these cells contains polysomes and a few mitochondria. Receptors for sheep's red blood cells and T-antigen are absent on the surface of the cells. In 11–12-week human embryos, the T-lymphocytes are reduced in size, clumps of heterochromatin appear in their nuclei and receptors for sheep's red blood cells (79%) and T-antigen (60%) appear on the surface of the cells. Later, the quantity of compact chromatin in the nuclei of the thermocytes increases and the cells acquire their definitive properties and structure.
Similar content being viewed by others
Literature Cited
S. S. Raitsina, N. S. Gladkova, N. A. Chuich, O. P. Ryabchikov, et al., in: Data on Current Problems in Modern Histology [in Russian], Moscow (1977), pp. 88–90.
R. B. Khesin and B. A. Leibovich, Mol. Biol., No. 10, 3 (1976).
G. E. M. Asma, W. Pichler, H. R. E. Schult, et al., Clin. Exp. Immunol.,29, 278 (1977).
M. Barg, T. Mandel, and G. R. Johnson, Aust. J. Exp. Biol. Med. Sci.,56, 195 (1978).
Y. Clermont, Physiol. Rev.,52, 198 (1972).
J. Z. Haar, Anat. Rec.,179, 463 (1974).
T. Hoshino, M. Takeda, K. Abe, and T. Ito, Anat. Rec.,164, 46 (1969).
M. Jondal, G. Holm, and H. Wigzell, J. Exp. Med.,136, 207 (1972).
K. Komuro and E. A. Boyse, Lancet,1, 740 (1973).
C. P. Leblond and H. Cheng, in: Stem Cells of Renewing Cell Populations, edited by A. B. Cairnie, P. K. Lala, and D. G. Osmond, New York (1976), pp. 7–31.
D. A. Moneret Vautrin and A. Dollander, Rev. Franc. Allerg.,16, 197 (1976).
D. P. Stites, J. Caldwell, M. C. Carr and H. H. Fudenberg, Clin. Immunol.,4, 519 (1975).
M. Sugimoto, T. Yasuda, and Y. Egashira, Develop. Biol.,57, 281 (1977).
Rights and permissions
About this article
Cite this article
Raitsina, S.S., Kalinina, I.I. Ultrastructure and differential antigens of human T-lymphocytes during embryogenesis. Bull Exp Biol Med 88, 1196–1199 (1979). https://doi.org/10.1007/BF00838206
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00838206