Angelo Lonoce

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DNA samples from about 100 human-hamster somatic cell hybrids, previously characterized by conventional banding techniques, were amplified with dual-Alu PCR. The products were then used as probes in FISH experiments on normal human metaphases for an accurate cytogenetic characterization of the human material retained in each hybrid. In addition to entire(More)
Double minutes (dmin)-circular, extra-chromosomal amplifications of specific acentric DNA fragments-are relatively frequent in malignant disorders, particularly in solid tumors. In acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS), dmin are observed in approximately 1% of the cases. Most of them consist of an amplified segment from chromosome(More)
Twenty-seven human alphoid DNA probes have been hybridized in situ to metaphase spreads of the common chimpanzee (PTR), the pigmy chimpanzee (PPA), and the gorilla (GGO) to investigate the evolutionary relationship between the centromeric regions of the great ape chromosomes. The surprising results showed that the vast majority of the probes did not(More)
FISH experiments on metaphase chromosomes, interphase nuclei, and extended chromatin were performed to investigate the structural organization of alphoid subsets coexisting on human chromosomes 1, 4, 5, 7, 9, 15, 18, and 19. Results indicate that multiple subsets present on chromosomes 5, 7, 15, 18, and 19 are organized in structurally distinct and(More)
The "golden path", produced by the Human Genome Project effort, is composed of a collection of overlapping and fully sequenced BAC/PAC clones covering almost completely the human genome. These clones can be advantageously exploited as fluorescence in situ hybridization (FISH) probes for the characterization of rearrangements frequently found in tumors.(More)
Double minutes (dmin) and homogeneously staining regions (hsr) are the cytogenetic hallmarks of genomic amplification in cancer. Different mechanisms have been proposed to explain their genesis. Recently, our group showed that the MYC-containing dmin in leukemia cases arise by excision and amplification (episome model). In the present paper we investigated(More)
Familial Adenomatous Polyposis (FAP) is a premalignant disease of the gastrointestinal tract inherited as an autosomal dominant trait assigned to chromosome 5q21. The 15 exons of the APC gene responsible for the defect were amplified from the DNA of one FAP patient. SSCP analysis of the amplified DNA revealed a variant conformer of exon 10. The sequencing(More)
The BCR-ABL1 fusion gene defines the subgroup of acute lymphoblastic leukemia (ALL) with the worst clinical prognosis. To identify oncogenic lesions that combine with BCR-ABL1 to cause ALL, we used Affymetrix Genome-Wide Human SNP arrays (250K NspI and SNP 6.0), fluorescence in situ hybridization, and genomic polymerase chain reaction to study 106 cases of(More)
Linkage analysis was performed on 188 subjects belonging to 18 Italian families segregating for familial adenomatous polyposis (FAP) using 7 polymorphic markers (5 restriction fragment length and 2 dinucleotide repeat polymorphisms) mapping in 5q21. A two-point linkage analysis performed with the LINKAGE program gave significant lod scores (> 3) between the(More)
Ring chromosomes are cytogenetic hallmarks of genomic amplification in several bone and soft tissue tumors, in particular atypical lipomatous tumors (ALT). In ALT, the ring chromosomes invariably contain amplified material from the central part of the long arm of chromosome 12, mainly 12q12-->15, but often also segments from other chromosomes are involved.(More)