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Analysis Of Podocalyxin And Ezrin In Cancer

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1.6 Podocalyxin and ezrin in cancer
Abnormal expression of PODXL has been linked to many human cancers, including germ-line cancers, several carcinoma, malignant astrocytoma and leukemia (McNagny et al., 2012). In addition, PODXL germ-line polymorphisms and SNPs have been identified that increase the risk of developing aggressive prostate cancer (Neville et al., 2002). For example, elevated PODXL expression in breast, pancreatic, gastric and colorectal cancer has emerged as a predictor of poor prognosis and distant metastasis (Laitinen et al., 2015; Larsson et al., 2011; Nielsen and McNagny, 2009; Saukkonen et al., 2015; Somasiri et al., 2004). Of note, several studies detected focal expression of PODXL at invasive tumor fronts (Boman et …show more content…

Importantly, the ERM protein ezrin itself is a well-known mediator of metastasis (Elliott et al., 2005; Khanna et al., 2004; Meng et al., 2010). Many clinical studies have linked high expression of ezrin with poor outcome in cancer patients suffering from a wide variety of cancers, including prostate, breast can lung cancer (Clucas and Valderrama, 2014). Interestingly, specifically the abnormal distribution of ezrin in breast cancer patients, from the apical regions of non-tumorigenic cells to motile projections in invasive cells, has been correlated with poor prognosis (Sarrio et al., 2006). In addition, it has previously been indicated as an important regulator of metastasis in the murine carcinoma cell line AC2M2 (Elliott et al., 2005). Furthermore, ezrin overexpression has been shown in various studies to promote the survival, migration and/or invasion of cancer cells into surrounding tissue and to disrupt cell-cell contacts (Clucas and Valderrama, 2014).
ERMs in general can regulate a number of processes important in tumor development and metastasis through the formation of membrane-cytoskeleton complexes, including cell adhesion, survival and cell migration (Bretscher et al., 2002; Clucas and Valderrama, 2014). As such it is not surprising that the other ERM proteins, radixin and moesin, have also been

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