Summary
Gastrinomas are pancreatic endocrine neoplasms that arise either sporadically or are inherited as part of the multiple endocrine neoplasia type I syndrome (MEN I). Loss of heterozygosity (LOH) in the region flanking the MEN I gene at chromosome 11q13 has been documented in a few sporadic and familial pancreatic endocrine tumors, but not previously in sporadic gastrinomas. It has therefore been suggested that gastrinomas develop by a mechanism different from other tumors associated with the MENI syndsrome. We report LOH on chromosome 11 in 5 of 11 sporadic gastrinomas. Four of these tumors have LOH for markers flanking the MEN I region. Molecular evaluation of segments of chromosomes 3, 13, and 17 known to contain cloned or putative tumor suppressor genes fail to show LOH except at one locus in one tumor. These data suggest that a tumor suppressor DNA segment exists at 11q13 that may be involved in the development of sporadic gastrinomas.
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Sawicki, M.P., Wan, YJ.Y., Johnson, C.L. et al. Loss of heterozygosity on chromosome 11 in sporadic gastrinomas. Hum Genet 89, 445–449 (1992). https://doi.org/10.1007/BF00194320
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DOI: https://doi.org/10.1007/BF00194320