Trisomy 7 in non-neoplastic tubular epithelial cells of the kidney.

Abstract:

:The cellular origin of trisomy 7 in non-neoplastic kidney tissue specimens from 10 patients, seven with malignant tumors and three with non-neoplastic kidney diseases, was studied by the MAC (morphology antibody chromosomes) technique, which allows analysis of cellular morphology/histology, immunophenotype, and chromosomal aneuploidy by conventional cytogenetics, and/or fluorescent in situ hybridization in both interphase and mitotic cells. In primary cultures, trisomy 7 was detected primarily in cytokeratin-positive cells. Among freshly isolated renal cells, the trisomy was mainly observed in proximal tubular cells positive to brush-border antigen, and, to a lesser extent, in distal tubular cells positive to Tamm-Horsfall glycoprotein. The frequency of trisomy 7 in lymphocytes expressing CD3 or CD22 antigens isolated from non-neoplastic and tumor tissues was substantially lower than in the epithelial cells and was not increased compared with that in control lymphocytes from peripheral blood. The results thus demonstrate that the non-neoplastic kidney cells with trisomy 7 are mainly normal epithelial cells, preferentially those of the proximal tubule.

journal_name

Hum Genet

journal_title

Human genetics

authors

Knuutila S,Larramendy ML,Elfving P,el-Rifai W,Miettinen A,Mitelman F

doi

10.1007/BF00209393

subject

Has Abstract

pub_date

1995-02-01 00:00:00

pages

149-56

issue

2

eissn

0340-6717

issn

1432-1203

journal_volume

95

pub_type

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