The role of folate receptor alpha (FRα) in the response of malignant pleural mesothelioma to pemetrexed-containing chemotherapy
| Autor: | Alan Hilary Calvert, Elizabeth Ruth Plummer, John Lunec, A R A Razak, A E Quinn, J E Nutt, Fiona Black, K. O'Toole |
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| Rok vydání: | 2010 |
| Předmět: |
Mesothelioma
Folate Receptor Alpha Cancer Research Pathology medicine.medical_specialty Guanine Pleural Neoplasms medicine.medical_treatment Blotting Western Receptors Cell Surface cell lines Pemetrexed Folate receptor α Pleural disease chemistry.chemical_compound Glutamates Cell Line Tumor medicine Carcinoma Humans Chemotherapy Reverse Transcriptase Polymerase Chain Reaction business.industry Folate Receptors GPI-Anchored Cancer medicine.disease Immunohistochemistry Oncology chemistry Antifolate Cancer research Folic Acid Antagonists Translational Therapeutics Carrier Proteins business medicine.drug |
| Zdroj: | British Journal of Cancer |
| ISSN: | 1532-1827 0007-0920 |
| Popis: | Background: The standard treatment of choice for malignant pleural mesothelioma is chemotherapy with pemetrexed and platinum, but the clinical outcome is poor. This study investigates the response to pemetrexed in a panel of eight mesothelioma cell lines and the clinical outcome for patients treated with pemetrexed in relation to folate receptor alpha (FRα). Methods: Cell lines were treated with pemetrexed to determine the concentration that reduced growth to 50% (GI50). FRα expression was determined by western blotting and that of FRα, reduced folate carrier (RFC) and proton-coupled folate transporter (PCFT) by real-time quantitative RT–PCR. Immunohistochemistry for FRα was carried out on 62 paraffin-embedded samples of mesothelioma from patients who were subsequently treated with pemetrexed. Results: A wide range of GI50 values was obtained for the cell lines, H2452 cells being the most sensitive (GI50 22 nM) and RS5 cells having a GI50 value greater than 10 μM. No FRα protein was detected in any cell line, and there was no relationship between sensitivity and expression of folate transporters. FRα was detected in 39% of tumour samples, generally in a small percentage of cells. There was no correlation between the presence of FRα and the outcome of pemetrexed treatment, and no significant difference between histological subtypes. Conclusion: Response to treatment with pemetrexed does not depend on the presence of FRα. |
| Databáze: | OpenAIRE |
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