Biomaterial Database

Comparative DNA analyses in longstanding ulcerative colitis with aneuploidy. 1989

R Löfberg, and T Caspersson, and B Tribukait, and A Ost

Department of Medicine, Huddinge University Hospital, Sweden.

In seven patients with longstanding ulcerative colitis, multiple mucosal biopsies taken at colonoscopy were assessed for DNA content and histological dysplasia. DNA analyses were performed using flow cytometric analyses in biopsies and microspectrophotometry in imprint slides prepared from the biopsies. Abnormal aneuploid DNA content was detected in five of the patients in eight separate locations in the colon. There was good conformity between the two methods in the detection of aneuploidy. Both methods of DNA analysis are considered to be applicable in mucosal biopsies from patients with ulcerative colitis. In two patients with significant low grade dysplasia in association with macroscopical lesions (DALMs), there was a relationship with aneuploid DNA pattern found by flow cytometric or microspectrophotometric analyses. Indefinite changes, probably dysplastic were found in three other patients and two of those also displayed aneuploidy, although only once in the same biopsy location. In five locations aneuploidy was detected without concomitant dysplasia. DNA-aneuploidy seems therefore to appear earlier than dysplasia and may be an early marker of malignant transformation of the mucosa in ulcerative colitis. Prospective trials are needed before the clinical significance of early findings of aneuploidy can be determined.

UI	MeSH Term	Description	Entries
D011446	Prospective Studies	Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.	Prospective Study,Studies, Prospective,Study, Prospective
D012007	Rectum	The distal segment of the LARGE INTESTINE, between the SIGMOID COLON and the ANAL CANAL.	Rectums
D003093	Colitis, Ulcerative	Inflammation of the COLON that is predominantly confined to the MUCOSA. Its major symptoms include DIARRHEA, rectal BLEEDING, the passage of MUCUS, and ABDOMINAL PAIN.	Colitis Gravis,Idiopathic Proctocolitis,Inflammatory Bowel Disease, Ulcerative Colitis Type,Ulcerative Colitis
D003106	Colon	The segment of LARGE INTESTINE between the CECUM and the RECTUM. It includes the ASCENDING COLON; the TRANSVERSE COLON; the DESCENDING COLON; and the SIGMOID COLON.	Appendix Epiploica,Taenia Coli,Omental Appendices,Omental Appendix,Appendices, Omental,Appendix, Omental
D004247	DNA	A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).	DNA, Double-Stranded,Deoxyribonucleic Acid,ds-DNA,DNA, Double Stranded,Double-Stranded DNA,ds DNA
D005434	Flow Cytometry	Technique using an instrument system for making, processing, and displaying one or more measurements on individual cells obtained from a cell suspension. Cells are usually stained with one or more fluorescent dyes specific to cell components of interest, e.g., DNA, and fluorescence of each cell is measured as it rapidly transverses the excitation beam (laser or mercury arc lamp). Fluorescence provides a quantitative measure of various biochemical and biophysical properties of the cell, as well as a basis for cell sorting. Other measurable optical parameters include light absorption and light scattering, the latter being applicable to the measurement of cell size, shape, density, granularity, and stain uptake.	Cytofluorometry, Flow,Cytometry, Flow,Flow Microfluorimetry,Fluorescence-Activated Cell Sorting,Microfluorometry, Flow,Cell Sorting, Fluorescence-Activated,Cell Sortings, Fluorescence-Activated,Cytofluorometries, Flow,Cytometries, Flow,Flow Cytofluorometries,Flow Cytofluorometry,Flow Cytometries,Flow Microfluorometries,Flow Microfluorometry,Fluorescence Activated Cell Sorting,Fluorescence-Activated Cell Sortings,Microfluorimetry, Flow,Microfluorometries, Flow,Sorting, Fluorescence-Activated Cell,Sortings, Fluorescence-Activated Cell
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000782	Aneuploidy	The chromosomal constitution of cells which deviate from the normal by the addition or subtraction of CHROMOSOMES, chromosome pairs, or chromosome fragments. In a normally diploid cell (DIPLOIDY) the loss of a chromosome pair is termed nullisomy (symbol: 2N-2), the loss of a single chromosome is MONOSOMY (symbol: 2N-1), the addition of a chromosome pair is tetrasomy (symbol: 2N+2), the addition of a single chromosome is TRISOMY (symbol: 2N+1).	Aneuploid,Aneuploid Cell,Aneuploid Cells,Aneuploidies,Aneuploids,Cell, Aneuploid,Cells, Aneuploid
D015591	Microspectrophotometry	Analytical technique for studying substances present at enzyme concentrations in single cells, in situ, by measuring light absorption. Light from a tungsten strip lamp or xenon arc dispersed by a grating monochromator illuminates the optical system of a microscope. The absorbance of light is measured (in nanometers) by comparing the difference between the image of the sample and a reference image.	Microspectrophotometries