Analysis of basal chromosome instability in patients with chronic lymphocytic leukaemia
| Autor: | Carmen Stanganelli, Irma Slavutsky, Andrea Krzywinski, Micaela Palmitelli, Marcela González Cid, Flavia Stella, Raimundo F. Bezares |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male medicine.medical_specialty Health Toxicology and Mutagenesis Chronic lymphocytic leukemia Immunoglobulin Variable Region Biology Toxicology Gastroenterology Genomic Instability MICRONUCLEI FREQUENCY Ciencias Biológicas 03 medical and health sciences Basal (phylogenetics) Genética y Herencia 0302 clinical medicine Chromosomal Instability Internal medicine Chromosome instability Biomarkers Tumor Genetics medicine PATIENTS Humans Genetic Predisposition to Disease Genetic Association Studies In Situ Hybridization Fluorescence Genetics (clinical) Aged 030304 developmental biology Aged 80 and over Chromosome Aberrations 0303 health sciences Cytogenetics Cancer Middle Aged medicine.disease BASAL CHROMOSOME INSTABILITY Leukemia Lymphocytic Chronic B-Cell CHRONIC LYMPHOCYTIC LEUKAEMIA Karyotyping 030220 oncology & carcinogenesis Mutation Chromosome abnormality Immunoglobulin heavy chain Female IGHV@ Carcinoma in Situ CIENCIAS NATURALES Y EXACTAS |
| Popis: | Genomic instability is a hallmark of cancer, contributing to tumour development and transformation, being chromosome instability (CIN) the most common form in human cancer. Chronic lymphocytic leukaemia (CLL) is the most frequent adult leukaemia in the Western world. In this study, we have evaluated basal CIN in untreated patients with CLL by measuring chromosome aberrations (CAs) and micronucleus (MN) frequency and their association with different prognostic factors. Seventy-two patients and 21 normal controls were analysed. Cytogenetic and fluorescence in situ hybridisation (FISH) studies were performed. IGHV (immunoglobulin heavy chain variable region) mutational status was evaluated by reverse transcription polymerase chain reaction and sequencing. An increased number of CA in patients compared with controls ( P = 0.0001) was observed. Cases with abnormal karyotypes showed increased CA rate than those with normal karyotypes ( P = 0.0026), with a particularly highest frequency in cases with complex karyotypes. Among FISH risk groups, a significant low frequency of CA was found in patients with no FISH alterations compared to those with del13q14 and ≥2 FISH alterations ( P = 0.0074). When mean CA value (6.7%) was considered, significant differences in the distribution of low and high CA frequency between cases with normal and abnormal karyotypes ( P = 0.002) were observed. By MN analysis, higher frequency in patients compared to controls ( P = 0.0001) was also found, as well as between cases with ≥2 FISH abnormalities and those with no FISH alterations ( P = 0.026). Similarly, significant differences were observed when patients were divided according to mean MN frequency (2.2%; P ≤ 0.04). Interestingly, patients with high MN frequency had shorter time to first treatment than those with low frequency ( P = 0.024). Cases with mutated and unmutated IGHV status showed increased CA and MN frequencies compared to controls ( P ≤ 0.0007), but no differences between both groups were found. Our results support the strong interaction between CIN and genomic complexity as well as their influence on poor outcome in this pathology. Fil: Palmitelli, Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Medicina Experimental. Academia Nacional de Medicina de Buenos Aires. Instituto de Medicina Experimental; Argentina Fil: Stanganelli, Carmen Graciela. Academia Nacional de Medicina de Buenos Aires. Instituto de Investigaciones Hematológicas "Mariano R. Castex"; Argentina Fil: Stella, Flavia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Medicina Experimental. Academia Nacional de Medicina de Buenos Aires. Instituto de Medicina Experimental; Argentina Fil: Krywinski, Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Medicina Experimental. Academia Nacional de Medicina de Buenos Aires. Instituto de Medicina Experimental; Argentina Fil: Bezares, Raimundo F.. Gobierno de la Ciudad de Buenos Aires. Hospital General de Agudos "Dr. Teodoro Álvarez"; Argentina Fil: Gonzalez Cid, Marcela Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Medicina Experimental. Academia Nacional de Medicina de Buenos Aires. Instituto de Medicina Experimental; Argentina Fil: Slavutsky, Irma Rosa. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Medicina Experimental. Academia Nacional de Medicina de Buenos Aires. Instituto de Medicina Experimental; Argentina |
| Databáze: | OpenAIRE |
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