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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
18
pubmed:dateCreated
2005-9-16
pubmed:abstractText
Multicolor fluorescent in situ hybridization (FISH) was used to identify acquired chromosomal aberrations in 12 patients with mycosis fungoides or Sézary syndrome, the most common forms of primary cutaneous T-cell lymphoma (CTCL). The most frequently affected chromosome was 12, which showed clonal deletions or translocations with a break point in 12q21 or 12q22 in five of seven consecutive Sézary syndrome patients and a clonal monosomy in the sixth patient. The break point of a balanced translocation t(12;18)(q21;q21.2), mapped in the minimal common region of two deletions, fine mapped to 12q2. By locus-specific FISH, the translocation disrupted one gene, NAV3 (POMFIL1), a human homologue of unc-53 in Caenorhabditis elegans. A missense mutation in the remaining NAV3 allele was found in one of six cases with a deletion or translocation. With locus-specific FISH, NAV3 deletions were found in the skin lesions of four of eight (50%) patients with early mycosis fungoides (stages IA-IIA) and in the skin or lymph node of 11 of 13 (85%) patients with advanced mycosis fungoides or Sézary syndrome. Preliminary functional studies with lentiviral small interfering RNA-based NAV3 silencing in Jurkat cells and in primary lymphocytes showed enhanced interleukin 2 expression (but not CD25 expression). Thus, NAV3 may contribute to the growth, differentiation, and apoptosis of CTCL cells as well as to the skewing from Th1-type to Th2-type phenotype during disease progression. NAV3, a novel putative haploinsufficient tumor suppressor gene, is disrupted in most cases of the commonest types of CTCL and may thus provide a new diagnostic tool.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0008-5472
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
65
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
8101-10
pubmed:dateRevised
2008-10-14
pubmed:meshHeading
pubmed-meshheading:16166283-Alleles, pubmed-meshheading:16166283-Chromosome Aberrations, pubmed-meshheading:16166283-Chromosome Breakage, pubmed-meshheading:16166283-Chromosome Mapping, pubmed-meshheading:16166283-Chromosomes, Human, Pair 12, pubmed-meshheading:16166283-Gene Deletion, pubmed-meshheading:16166283-Gene Silencing, pubmed-meshheading:16166283-Humans, pubmed-meshheading:16166283-In Situ Hybridization, Fluorescence, pubmed-meshheading:16166283-Interleukin-2, pubmed-meshheading:16166283-Interphase, pubmed-meshheading:16166283-Lymphoma, T-Cell, Cutaneous, pubmed-meshheading:16166283-Membrane Proteins, pubmed-meshheading:16166283-Nerve Tissue Proteins, pubmed-meshheading:16166283-Sezary Syndrome, pubmed-meshheading:16166283-Skin Neoplasms, pubmed-meshheading:16166283-Translocation, Genetic
pubmed:year
2005
pubmed:articleTitle
Primary cutaneous T-cell lymphomas show a deletion or translocation affecting NAV3, the human UNC-53 homologue.
pubmed:affiliation
Department of Dermatology and Venereology, Helsinki University Central Hospital, University of Helsinki, Helsinki, Finland. leena.p.karenko@hus.fi
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't