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The tumor suppressor gene DICE1 is located within a previously reported critical region of loss of heterozygosity on chromosome 13q14.3. Expression of the remaining DICE1 allele is down-regulated in non-small cell lung carcinomas. In IGF-IR transformed Balb/c 3T3, DICE1 substantially suppressed growth in soft agar. These results demonstrate that DICE1 has a growth-suppressing activity and interferes with anchorage-independent growth of IGF-IR transformed tumor cells dependent upon IGF-I signaling.
