Abstract:
:Our previous studies demonstrate that introduction of a approximately 70 cM region (now estimated at 63.75 Mb by the Human Genome Project) of human chromosome 12 into the highly metastatic Dunning rat prostate cancer cell line AT6.1 results in >30-fold (>/=90%) reduction in the number of overt metastases in spontaneous metastasis assays. We report the further localization and biological characterization of the metastasis-suppressor activity encoded by a reduced region of chromosome 12. To localize this metastasis-suppressor activity, a panel of AT6.1 microcell hybrids that retain varying portions of human chromosome 12 was constructed and subjected to sequence-tagged site (STS)-based PCR analysis and assessment of in vivo metastatic ability. Data from these complementary approaches localized the metastasis-suppressor activity to a approximately 4.2 Mb portion of human chromosome 12q24.3 comprised of 3 separate regions. Reverse transcriptase-polymerase chain reaction (RT-PCR) and immunoblotting were used for differential expression analyses to identify which characterized genes, predicted gene sequences and expressed sequence tags (ESTs) within this region could be responsible for the observed metastasis suppression. Comprehensive in vivo studies showed that suppressed AT6.1-12 hybrids that retain the metastasis-suppressor region on 12q24.3 are capable of arriving at the secondary site, but are not able to persist there. Thus, unlike other metastasis-suppressor genes characterized to date, the metastasis-suppressor gene encoded by this region appears to utilize a different biologic mechanism to suppress the growth of overt metastases at the secondary site.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Jaeger EB,Chekmareva MA,Tennant TR,Luu HH,Hickson JA,Chen SL,Samant RS,Sokoloff MH,Rinker-Schaeffer CWdoi
10.1002/ijc.11483keywords:
subject
Has Abstractpub_date
2004-01-01 00:00:00pages
15-22issue
1eissn
0020-7136issn
1097-0215journal_volume
108pub_type
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