MNK1 signaling induces an ANGPTL4-mediated gene signature to drive melanoma progression
ONCOGENE
Authors: Yang, William; Khoury, Elie; Guo, Qianyu; Prabhu, Sathyen A.; Emond, Audrey; Huang, Fan; Goncalves, Christophe; Zhan, Yao; Plourde, Dany; Nichol, Jessica N.; Dahabieh, Michael S.; Miller Jr., Wilson H.; del Rincon, Sonia Victoria
Abstract
The BRAF(V600E) mutation occurs in more than 50% of cutaneous melanomas, and results in the constitutive activation of the mitogen-activated protein kinases (MAPK) pathway. MAP kinase-interacting serine/threonine-protein kinase 1 and 2 (MNK1/2) are downstream effectors of the activated MAPK pathway, and important molecular targets in invasive and metastatic cancer. Despite the well-known role of MNK1 in regulating mRNA translation, little is known concerning the impact of its aberrant activation on gene transcription. Here, we show that changes in the activity, or abundance, of MNK1 result in changes in the expression of pro-oncogenic and pro-invasive genes. Among the MNK1-upregulated genes, we identify Angiopoietin-like 4 (ANGPTL4), which in turn promotes an invasive phenotype via its ability to induce the expression of matrix metalloproteinases (MMPs). Using a pharmacologic inhibitor of MNK1/2, SEL201, we demonstrate that BRAF(V600E)-mutated cutaneous melanoma cells are reliant on MNK1/2 for invasion and lung metastasis.
Association of a genetic variant in the angiopoietin-like protein 4 gene with cervical cancer
PATHOLOGY RESEARCH AND PRACTICE
Authors: Rahmani, Farzad; Hasanzadeh, Malihe; Hassanian, Seyed Mahdi; Khazaei, Majid; Esmaily, Habibollah; Asef-Agah, Seyed Ami; Naghipour, Alireza; Ferns, Gordon A.; Avan, Amir
Abstract
Background: Cervical cancer is among the most aggressive gynecological tumors and is a consequence of interactions between genetic and epigenetic factors. Several genetic polymorphisms related to cervical cancer have been reported in previous clinical studies. In this study, we aimed to explore the possible relationship between polymorphisms of the ANGPTL4 gene locus and susceptibility to cervical cancer. Methods: We investigated the relationship between a single nucleotide polymorphism (SNP) in the ANPGTL4 gene (rs116843064) and risk of cervical cancer in a total of 378 individuals with (n = 151), or without (n = 227) cancer. DNA was extracted, and genotyped using a Taq-Man based real time PCR. Results: The ANPGTL4 polymorphism was found to be associated with an increased risk of developing cervical neoplasia using dominant model (OR = 12.48, CI = 4.9-31.82, p< 0.0001) and additive model (OR = 30.54, CI = 7.35-126.89, p < 0.0001). Conclusion: Our results indicate that there is a strong association between ANPGTL4 and the susceptibility for cervical cancer suggesting that it is a potential risk factor for cervical neoplasia.