Evidence for interaction between the TCO and NMTC1 loci in familial non-medullary thyroid cancer.
J Med Genet
; 41(6): 407-12, 2004 Jun.
Article
em En
| MEDLINE
| ID: mdl-15173224
ABSTRACT
BACKGROUND:
Familial non-medullary thyroid cancer (fNMTC) is a complex genetic disorder that is more aggressive than its sporadic counterpart. Thus far, three genetic loci have been implicated in susceptibility to fNMTC by linkage analysis.METHODS:
We used linkage analysis to test the significance of two of the known susceptibility loci for fNMTC, TCO on 19p13 and NMTC1 on 2q21 in 10 fNMTC families, nine of which present with cell oxyphilia, a rare histological phenotype associated with TCO. Furthermore, we used two-locus linkage analysis to examine the possibility that the TCO and NMTC1 loci interact to increase the risk of NMTC.RESULTS:
The 10 families provided evidence for linkage at both TCO and NMTC, with LOD scores of 1.56 and 2.85, respectively. Two-locus linkage analysis, using a multiplicative risk model for the development of NMTC, achieved a maximum LOD of 3.92, with an LOD of 4.51 when assuming 70% of families were linked, indicating that the segregation in these families is consistent with an interaction model. Most of this evidence came from a large Tyrolean family that singularly achieved a two-locus LOD of 3.21.CONCLUSIONS:
These results provide further evidence that susceptibility genes for fNMTC exist at 19p13 and 2q21, and furthermore, raise the possibility that in a subset of fNMTC pedigrees, these loci interact resulting in significantly increased risk of NMTC for patients that carry both susceptibility loci.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Cromossomos Humanos Par 2
/
Cromossomos Humanos Par 19
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Neoplasias da Glândula Tireoide
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Predisposição Genética para Doença
Tipo de estudo:
Prognostic_studies
Limite:
Female
/
Humans
/
Male
País como assunto:
Oceania
Idioma:
En
Ano de publicação:
2004
Tipo de documento:
Article