منابع مشابه
Nucleolar organizer regions of lymphomas in Korea.
Nucleolar organizer regions (NORs) are loops of DNA which occur in the nucleoli of cells and which possess ribosomal RNA (rRNA) genes. The numbers and/or configurations of NORs have been thought to be related to cellular activities. To assess the applicability of NORs associated protein (Ag-NORs) in the field of diagnostic histopathology, a silver staining was done in paraffin sections of malig...
متن کاملC-Banded Karyotype and Nucleolar Organizer Regions (NORs) of Wild Boar, Sus scrofa (Artiodactyla: Suidae) from Anatolia
The present study reports the karyotype, C-banding, and nucleolar organizer regions (NORs) of 6 Sus scrofa (Linnaeus, 1758) males from Anatolia. The karyotype of S. scrofa comprised (2n) 38 chromosomes, the number of chromosomal arms (FN) was 64, and the number of autosomal arms (FNa) was 60. C-positive regions appeared to be restricted to the centromeric regions of autosomes 1, and 13-18, and ...
متن کاملNucleolar organizer region (NORs) in pseudocarcinomatous hyperplasia and squamous cell carcinoma of the oral mucosa.
Counts of nucleolar regions (NORs) demonstrated by a silver staining technique in paraffin sections, have been used to distinguish benign from malignant lesions. AgNORs were studied in 24 biopsies from oral cavity (5 cases of normal oral mucosa, 5 of pseudocarcinomatous hyperplasia and 14 of squamous cell carcinoma, subdivided according to degree of differentiation: 5 grade 1, 5 grade 2 and 4 g...
متن کاملNorethindrone scatters silver-stained nucleolar organizer regions of Ishikawa cells.
We investigated the effects of sex steroids on silver-stained nucleolar organizer regions (Ag-NORs) and DNA/RNA kinetics in Ishikawa cells. Norethindrone and its isomer norethynodrel exclusively caused Ag-NORs to scatter in the nuclear matrix, from the nucleolus. No such effect occurred with the other sex steroids tested, including progestational, androgenic, and estrogenic compounds. Nuclear a...
متن کاملNucleolar Organizer Regions in Oral Squamous Cell Carcinoma
BACKGROUND AND AIMS Several diagnostic methods are being employed to detect benign and malignant lesions, one of which is silver nitrate staining for organizer regions. The number of nucleolar organizing regions (NORs) can be used to show the degree of cell activity or metabolism in pathologic lesions. This study was designed to evaluate NORs as determi-nants of precancerous and squamous cell c...
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ژورنال
عنوان ژورنال: Sao Paulo Medical Journal
سال: 1994
ISSN: 1516-3180
DOI: 10.1590/s1516-31801994000400005