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Specific expression of OATPs in primary small cell lung cancer (SCLC) cells as novel biomarkers for diagnosis and therapy. | LitMetric

AI Article Synopsis

  • The study investigated the expression levels of organic anion transporting polypeptides (OATPs) in various lung cancer cell lines and tissue samples, revealing distinct differences between primary and metastatic small cell lung cancer (SCLC) and carcinoid tumors.
  • OATP4A1 was found to be most prevalent in non-cancerous lung tissue and all SCLC and carcinoid samples, while OATP5A1 was more common in metastatic cells, and OATP6A1 was mostly found in SCLC cell lines and tumors.
  • Notable changes in OATP expression occurred after chemotherapy treatment, suggesting that OATPs could serve as potential biomarkers for monitoring tumor progression and metastasis in SCLC patients.*

Article Abstract

The expression of organic anion transporting polypeptides (OATPs) was elucidated in cell lines from small cell lung cancer (SCLC) and lung carcinoids and in paraffin-embedded samples from primary and metastatic SCLCs. We found a strong relationship between OATP expression and the origin of the cells, as cells from primary or metastatic SCLC and carcinoid tumors differ with respect to OATP levels. OATP4A1 is most prominent in non-malignant lung tissue and in all SCLC and carcinoid cell lines and tissues, OATP5A1 is most prominent in metastatic cells, and OATP6A1 is most prominent in SCLC cell lines and tumors. Treatment with topotecan, etoposide and cisplatin caused significant changes in the expression patterns of OATP4A1, OATP5A1, OATP6A1, chromogranin and synaptophysin. This effect was also evident in GLC-14 cells from an untreated SCLC patient before chemotherapy compared to GLC-16/-19 chemoresistant tumor cells from this patient after therapy. mRNA expression of OATP4A1, 5A1 and 6A1 correlates with protein expression as confirmed by quantitative microscopic image analysis and Western blots. OATPs might be novel biomarkers for tumor progression and the development of metastasis in SCLC patients.

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Source
http://dx.doi.org/10.1016/j.canlet.2014.09.025DOI Listing

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