A new technic for banded chromosomes, with similar results (100%) to those obtained with chromatids modification by trypsin (G bands), is described. The key consists in Pyronin addition (20 mg.%) to distilled water at hypotonic shock, following then a standard karyotype technic assayed with micro-method, reaching banding after Giemsa tinction at 3% in 6.7 phosphate pH. Its interest radicates in chromosome modification in vivo, simplicity, fiability (80% of excellent results) and reproductibility, allowing any cytogenetic laboratory a routine obtention of G bands in only four days.
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Atypical rearrangement involving 3'-IGH@ and a breakpoint at least 400 Kb upstream of an intact MYC in a CLL patient with an apparently balanced t(8;14)(q24.1;q32) and negative MYC expression.
Mol Cytogenet
February 2013
Clinical Molecular Cytogenetics Laboratory, Medicine, David Geffen UCLA School of Medicine, Los Angeles, CA, USA.
The t(8;14)(q24.1;q32), the cytogenetic hallmark of Burkitt's lymphoma, is also found, but rarely, in cases of chronic lymphocytic leukemia (CLL). Such translocation typically results in a MYC-IGH@ fusion subsequently deregulating and overexpressing MYC on der 14q32.
View Article and Find Full Text PDFA new technic for banded chromosomes, with similar results (100%) to those obtained with chromatids modification by trypsin (G bands), is described. The key consists in Pyronin addition (20 mg.%) to distilled water at hypotonic shock, following then a standard karyotype technic assayed with micro-method, reaching banding after Giemsa tinction at 3% in 6.
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