IRP2 as a potential modulator of cell proliferation, apoptosis and prognosis in nonsmall cell lung cancer
| Autor: | Iyad Ismail, Gerald Langman, Heena Khiroya, Jamie Kay, Babu Naidu, Chris Tselepis, Nabeel Ahmad, Kerry Woolnough, Alice M Turner, Jasbir S. Moore |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Pulmonary and Respiratory Medicine Male Pathology medicine.medical_specialty Lung Neoplasms Iron Gene Expression Apoptosis Cell Line 03 medical and health sciences Carcinoma Non-Small-Cell Lung medicine Humans Lung cancer Iron Regulatory Protein 2 Lung Aged Cell Proliferation Neoplasm Staging Proportional Hazards Models Gene knockdown Cell growth business.industry Epithelial Cells medicine.disease Prognosis Lung cancer susceptibility Reverse transcription polymerase chain reaction 030104 developmental biology Cell culture Gene Knockdown Techniques Cancer research Female business Intracellular |
| Zdroj: | The European respiratory journal. 49(4) |
| ISSN: | 1399-3003 |
| Popis: | IREB2is a gene that produces iron regulatory protein 2 (IRP2), which is critical to intracellular iron homeostasis and which relates to the rate of cellular proliferation.IREB2lies in a lung cancer susceptibility locus. The aims were to assess 1) the relationship between iron loading, cell proliferation and IRP2 expression in lung cancer; 2) the potential of iron related pathways as therapeutic targets; and 3) the relevance of IRP2 in operated lung cancer patients.Cells of two nonsmall cell cancer (NSCLC) lines and primary bronchial epithelial cells (PBECs) were cultured with and without iron; and proliferation, apoptosis and migration were assessed. Reverse transcriptase PCR and Western blot were used to assess expression of iron homeostasis genes/proteins. Iron chelation and knockdown ofIREB2were usedin vitroto explore therapeutics. A cohort of operated NSCLC patients was studied for markers of systemic iron status, tumour IRP2 staining and survival.Iron loading caused cell proliferation in cancer cell lines, which were less able to regulateIREB2expression than PBECs. Iron chelation resulted in a return of proliferation rates to baseline levels; knockdown ofIREB2had a similar effect. IRP2-positive tumours were larger (p=0.045) and higher percentage staining related to poorer survival (p=0.079).Loss of iron regulation represents a poor prognostic marker in lung cancer. |
| Databáze: | OpenAIRE |
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