This paper describes specific genetic changes involving chromosome 7 in mouse skin tumors, the most important consequence of which appears to be an alteration in the allelic balance of normal and mutant H-ras genes. The use of restriction-fragment-length polymorphisms in F1 hybrid mice demonstrates that trisomy of chromosome 7 is an early event preceding papilloma formation, and further events,...

BACKGROUND Although Epidermal Growth Factor Receptor (EGFR) over expression is a frequent event in colon adenocarcinoma (CA), identification of EGFR gene deregulation mechanisms--combined to k-ras mutations--remains the basic criterion for rational application of anti-EGFR targeted therapeutic strategies. AIM To detect EGFR gene numerical alterations in CA based on a combination of intra-oper...

Three cases of uncommon childhood hematologic disorders are reported. At presentation, one patient had refractory anemia with an excess of blasts (RAEB) with partial 7-monosomy and was reclassified into RAEB "in transformation" thereafter. Another case was diagnosed as acute myelogenous leukemia with complete 7-monosomy. The other case was diagnosed as RAEB "in transformation" without chromosom...

Genotyping, using plasma proteins or DNA polymorphisms or both, was carried out on 30 families selected through probands with Von Recklinghausen disease. The data provide additional evidence for the exclusion of loci on chromosomes 3 and 5, and chromosome arms 1q, 2p, 4p, 4q, 6q, 7p, 9q, 11p, 11q, and 14q. There was no evidence for genetic heterogeneity at D1S1 (DNF15S2) on chromosome arm 3p, u...

The genetic control of susceptibility to tuberculosis in DBA/2J and C57BL/6J mice is complex and influenced by at least four tuberculosis resistance loci (Trl1-Trl4). To further study the Trl3 and Trl4 loci, we have created congenic mouse lines D2.B6-Chr7 and D2.B6-Chr19, in which resistant B6-derived portions of chromosome 7 (Chr.7) and chromosome 19 (Chr.19) overlapping Trl3 and Trl4, respect...

By using the newly developed adhesive tumor cell culture system, we analyzed the chromosomal constitutions of primary lung tumor and nonmalignant normal lung tissue from 10 previously untreated patients with non-small cell lung cancer. Chromosomal analyses were successfully carried out in banded chromosome preparations from 10 tumor and 8 normal lung tissue samples. All analyzed tumor and norma...

The genus Fusarium comprises more than 300 species, and many of them are pathogens that cause severe diseases in agricultural, horticultural forestry plants both antropogenic natural ecosystems. Because their importance as plant pathogens, the genomes several spp. have been sequenced. Within this genus, circinatum is one most harmful pine trees attacking up to 60 Pinus species. Till now, 13 str...

Cytogenetic studies of 91 consecutive patients with therapy-related myelodysplasia or overt acute nonlymphocytic leukemia disclosed characteristic defects of chromosome 7 in 48 cases and of chromosome 5 in 21 cases. The chromosome 5 abnormalities were consistently present in all abnormal mitoses at the time of diagnosis, as were the chromosome 7 abnormalities in 45 of the 48 patients. Various a...

The effects of mitomycin C (MMC) and ethyl methanesulfonate (EMS) on the frequency of structural and numerical chromosomal aberrations were evaluated in bovine peripheral lymphocytes in vitro using fluorescence in situ hybridization (FISH) technique. Three whole chromosome painting probes (WCPs), BTA 1 for the bovine chromosome 1 (red colour), BTA 5 for chromosome 5 (green colour) and BTA 7 for...