[Morphofunctional characteristics of fibroblasts in basal cell nevus and Cockayne syndrome]

Some morphofunctional characters of fibroblasts in two genetic disorders--Cockayne syndrome (CS) and Basal cell naevus syndrome (BCNS) have been examined. The size of nucleus in BCN1SP line has been shown to be about 1.5 times less as well as the total size of nucleoli per nucleus, while the number of nucleoli was 2 times more compared with other cell lines investigated. Using the method of silver staining numerous nucleoli were shown to contain active loci of the nucleolus organizer regions. With the help of hybridization in situ the number of transcripts of 18S RNA molecules was shown to be 5 times more in BCN1SP cell line, and about 2.8 times more than in the other cell lines tested. The data obtained may be interpreted as a suggestion in favour of a greater activity of the nucleolus organizer regions in BCN1SP cell line followed by the disturbance in protein homeostasis of the cells.