title: Allelotype and loss of heterozygosity around the L-myc gene locus in primary lung cancers.
abstract: L-myc S-allele was reported to be associated with metastasis of lung cancer, indicating the existence of a putative tumor suppressor gene around the L-myc locus, in linkage disequilibrium. The relationship between the S-allele and inactivation of some tumor suppressor gene should be indicated by allelic loss. Therefore, we examined the association between the L-myc S-allele and loss of heterozygosity at 11 loci around the L-myc locus (1p34.3) in primary lesions or other biological characteristics in lung cancer. No associations between the S-allele and allelic loss around the L-myc locus or other characteristics were found. According to the deletion map, three shortest regions of overlap between D1S230 and D1S76 were identified. While loss of heterozygosity at SRO1, between D1S2797 and MYCL1, showed no relationship with the pathological stage, it was more frequently observed in squamous cell carcinoma than adenocarcinoma (P=0.019), and associated with high telomerase activity (P=0.046), an indicator of cellular immortality. In conclusion, we found three shortest regions of overlap (SROs) from D1S2797 to pter, and a tumor suppressor gene, which might be associated with suppression of lung cancer development but not with L-myc S-allele, may exist in SRO1.
authors.affiliation: Second Department of Internal Medicine, Hiroshima University School of Medicine, 1-2-3 Kasumi, Minami-Ku, Hiroshima, Japan.
authors.forename: C
authors.initials: C
authors.lastname: Mendoza
authors.forename: H
authors.initials: H
authors.lastname: Sato
authors.forename: K
authors.initials: K
authors.lastname: Hiyama
authors.forename: S
authors.initials: S
authors.lastname: Ishioka
authors.forename: T
authors.initials: T
authors.lastname: Isobe
authors.forename: H
authors.initials: H
authors.lastname: Maeda
authors.forename: E
authors.initials: E
authors.lastname: Hiyama
authors.forename: K
authors.initials: K
authors.lastname: Inai
authors.forename: M
authors.initials: M
authors.lastname: Yamakido
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics*; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D016147:Genes, Tumor Suppressor; D016259:Genes, myc / Q000235:genetics*; D006801:Humans; D019656:Loss of Heterozygosity; D008175:Lung Neoplasms / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D017354:Point Mutation