Abstract:
:Treatment of non-small cell lung carcinoma (NSCLC) remains at a disappointingly low success rate. Not only is metastatic spread common in NSCLC, but therapeutic success decreases dramatically once metastases are present. Understanding factors which contribute to poor prognosis in NSCLC is critical for development of more successful therapeutic approaches. Interleukin-10 (IL-10) expression has been shown in several studies to correlate with a poorer prognosis in NSCLC; however, the mechanisms by which IL-10 affects lung tumor growth and metastases are unclear. The goal of this study was to evaluate the effects of tumor-derived IL-10 on the growth and metastasis of lung cancer cells in a murine model. Lewis lung carcinoma cells were stably transfected with the chicken ovalbumin gene (cOVA) as a model tumor antigen (LL43 tumor cells) and subsequently transfected with the murine IL-10 gene (LL43-10 tumor cells). Subcutaneous growth of the LL43 tumor cells was not affected by expression of IL-10. However, LL43-10 tumors had a fourfold increase in tumor microvessel density, as indicated by CD31 staining. Metastatic potential was also increased in IL-10-expressing lung tumor cells, leading to a greater number of tumor cells in lymph nodes draining the primary tumor site. Finally, exposure of Lewis lung tumor cells in vitro to exogenous IL-10 dramatically increased their resistance to UV-induced apoptosis. These results indicate that a primary effect of IL-10 on lung cancer cells may be to increase their metastatic potential by promoting angiogenesis and resistance to apoptosis.
journal_name
Cytokinejournal_title
Cytokineauthors
Zeng L,O'Connor C,Zhang J,Kaplan AM,Cohen DAdoi
10.1016/j.cyto.2009.11.015subject
Has Abstractpub_date
2010-03-01 00:00:00pages
294-302issue
3eissn
1043-4666issn
1096-0023pii
S1043-4666(09)00876-Xjournal_volume
49pub_type
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