“SANDWICH” TECHNIQUE FOR THE ESTABLISHMENT OF CULTURES OF HUMAN SKIN FOR CHROMOSOME INVESTIGATION

Partial Turner's syndrome in four girls with Xq duplication and Xp deficiency

Four girls with some clinical symptoms of Turner's syndrome had Xq duplication and Xp deficiency, their karyotypes being 46,X,dup(X)(p113;q11), 46,X,dup(X)(p212;q211), 46,X,dup(X)(p225;q13), and 46,X,dup(X)(p222;q213). No mosaicism was found. The major clinical findings, short stature, lack of pterygium colli, and no continuous gamete production, are compared with those in three previously published cases.

Fluorescence and autoradiographic studies in patients with Turner's syndrome and 46,XXp- and 46,XXq- karyotypes

Two patients with the clinical picture of Turner's syndrome showed a 46,XXp— and a 46,XXq— karyotype identified by a combination of fluorescence and autoradiography. Autoradiography showed that the abnormal X chromosome was indicated in most cells. The Xg findings in case 1 indicated that the abnormal X chromosome was of paternal origin.

Cytogenetic effects of cyclamates on human cells in vitro

Chromosome studies on human cells in vitro have shown that the artificial sweeteners, sodium and calcium cyclamate, can induce chromosome breaks in vitro in human cells, in both leukocyte and monolayer cultures.