Skip to main content
Log in

Zwei subterminale Heterochromatinregionen bei einer seltenen Form einer 21/21-Translokation

Two subterminal heterochromatin regions in a rare form of 21/21 translocation

  • Originalarbeiten
  • Published:
Humangenetik Aims and scope Submit manuscript

Summary

A translocation resembling a chromosome D but with satellites at both ends in most metaphases was found in a child with a mild form of Down's syndrome. This chromosome was identified as a 21/21 translocation by atebrin staining. One G21-chromosome was missing.

To examine the origin and nature of this chromosome further, heterochromatin staining (Arrighi and Hsu, 1971) was performed. 2 subterminal heterochromatin regions were found in the translocation chromosome.

On the basis of this finding various possible origins of this chromosome are discussed.

Zusammenfassung

Bei einem 31/2jährigen Kind mit leichter Form eines Down-Syndroms wurde ein dem Chromosom D ähnliches Translokationschromosom gefunden, das nach Atebrin-Färbung als 21/21-Translokation identifiziert werden konnte. Es fehlt ein G21-Chromosom. Da das Translokationschromosom an beiden Enden Satelliten trägt, wurde zur Aufklärung des Entstehungsmechanismus die Heterochromatinfärbung nach Arrighi u. Hsu (1971) durchgeführt. Die Färbung ergab 2 subterminale Heterochromatinregionen an diesem Chromosom. Unter diesem Gesichtspunkt werden die möglichen Entstehungsmechanismen diskutiert.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

Literatur

  • Arrighi, F. E., Hsu, T. C.: Localisation of heterochromatin in human chromosomes. Cytogenetics 10, 81–86 (1971).

    Google Scholar 

  • Chen, T. R., Ruddle, F. H.: Karyotyp analysis utilizing differentially stained constitutive heterochromatin of human and murine chromosomes. Chromosoma (Berl.) 34, 51–72 (1971).

    Google Scholar 

  • Cohen, M. M., Davidson, R. G.: Down's syndrome assoziated with a familial (21q-;22q+) translocation. Cytogenetics 6, 321–330 (1967).

    Google Scholar 

  • Lejeune, J., Berger, R., Vidal, O. R., Rethoré, M.: Un cas de translocation G-G en tandem. Ann. Génét. 8, 60–62 (1965).

    Google Scholar 

  • McClintock, B.: Maize genetics. Yrbk. Carnegie Inst. Washington 42, 148–152 (1943).

    Google Scholar 

  • McClintock, B.: Maize gentics. Yrbk. Carnegie Inst. Washington 43, 127–135 (1944).

    Google Scholar 

  • Moorhead, P. S., Nowell, P. C., Mellmann, W. J., Battips, D. M., Hungerford, D. A.: Chromosome preparations of leucocytes cultured from human peripheral blood. Exp. Cell Res. 20, 613–616 (1960).

    Google Scholar 

  • Richards, B. W., Steward, A., Sylvester, P. E.: Reciprocal translocation and mosaicism in a Mongol. J. ment. Defic. Res. 9, 118–124 (1965).

    Google Scholar 

  • Sachdeva, S., Wodnicki, J., Smith, G. F.: Fluorescent chromosomes of a tandem translocation in a mongol patient. J. ment. Defic. Res. 15, 181–184 (1971).

    Google Scholar 

  • Sears, E. R., Cãmara, A.: A transmissible dicentric chromosome. Genetics 37, 125–135 (1952).

    Google Scholar 

  • Turpin, R., Lejeune, J.: Les chromosomes humains. p. 23–29, 1 volume. Paris: Gauthier-Villars 1965.

    Google Scholar 

  • Uchida, J. A., Lin, Ph. D., Lin, C. C., Hamilton, Ph. D.: Fluorescent staining of human chromosomes: Identification of some common aberrations. Canad. med. Ass. J. 105, 479–482 (1971).

    Google Scholar 

  • Vogel, W.: Identification of G-group chromosomes involved in a G/G tandem-translocation by the Giemsa-band technique. Humangenetik 14, 255–256 (1972).

    Google Scholar 

  • Vogel, W., Reinwein, H., Engel, W.: Tandem-Chromosom (G/G) mit Satelliten am kurzen und langen Arm bei einem Patienten mit Translokationstrisomie G1. Humangenetik 9, 361–371 (1970).

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Bartsch-Sandhoff, M., Schade, H. Zwei subterminale Heterochromatinregionen bei einer seltenen Form einer 21/21-Translokation. Hum Genet 18, 329–336 (1973). https://doi.org/10.1007/BF00291130

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00291130

Navigation