Abstract:
BACKGROUND:Human colorectal neuroendocrine cell carcinoma (NEC) is a rare disease with a poor prognosis. The biological behavior of NEC remains poorly understood. MATERIALS AND METHODS:We established two new NEC cell lines from a patient with rectal neuroendocrine carcinoma, NECS-P and NECS-L from the primary tumor and a liver metastasis, respectively. We investigated the biological differences between the two cell lines to study the mechanisms involved in liver metastasis. RESULTS:There was no difference between NECS-P and NECS-L in the morphological, ultrastructural and immunohistochemical studies. After addition of TGF-beta(1), the doubling times of NECS-P were increased in a dose-dependent manner relative to untreated cells, whereas TGF-beta(1) had no effect on NECS-L. The attachment and chemotactic response of the two cell lines were not enhanced by TGF-beta(1). The invasive capacity and the production of matrix metalloproteinase-2 (MMP-2) were significantly increased only in NECS-L following the addition of TGF-beta(1). When anti-MMP-2 antibody was added to the medium with TGF-beta(1), NECS-L invasion was inhibited. CONCLUSION:It is considered that these differences are important to understand the mechanisms of liver metastasis of NEC.
journal_name
Digestionjournal_title
Digestionauthors
Takahashi Y,Onda M,Tanaka N,Seya Tdoi
10.1159/000007825subject
Has Abstractpub_date
2000-01-01 00:00:00pages
262-70issue
4eissn
0012-2823issn
1421-9867pii
7825journal_volume
62pub_type
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