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Briz et al.                                                                                                                                                                                        Liver cancer chemoresistance

           to induce EMT via modulation of EGFR pathways      Mutua Madrileña (Call 2015), the Fundación Samuel
           in HCC cells is galectin-1 (Gal-1). [25]  Dysregulation   Solórzano Barruso (FS/7-2013 and FS/10-2014).
           of Gal-1 expression in HCC cells leads to an over-
           activation of FAK/PI3K/AKT and H-Ras/Raf/ERK       Conflicts of interest
           pathways resulting in enhanced phosphorylation of   There are no conflicts of interest.
           AKT, mTOR and p70 kinases and up-regulation of
           the αvβ3 integrin expression. A consequence of the   Patient consent
           dysregulation of these pathways is EMT induction   There is no patient involved.
           and higher resistance to sorafenib. Moreover, high
           levels of Gal-1 in tumors are associated with impaired   Ethics approval
           sorafenib response and reduced overall survival of
           patients with HCC. [25]                            This review paper is waived for ethics approval.

           (3) Cell-adhesion proteins involved in intracellular   REFERENCES
           signaling networks. An example is CD44, a stem cell   1.   Marin JJ, Romero MR, Briz O. Molecular bases of liver cancer
           marker that besides being the cell-surface receptor   refractoriness to pharmacological treatment. Curr Med Chem
           of the hyaluronic acid has been suggested to play     2010;17:709-40.
           functions as a co-receptor for several tyrosine kinase   2.   Doktorova H, Hrabeta J, Khalil MA, Eckschlager T. Hypoxia-
           receptors. [26]  In a recent study carried out with human   induced chemoresistance in cancer cells: the role of not only HIF-
           liver tumor cell lines in culture and implanted in nude   1. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub
           mice, it has been demonstrated that cells showing a   2015;159:166-77.
           mesenchymal-like phenotype and high expression of   3.   Chen J, Ding Z, Peng Y, Pan F, Li J, Zou L, Zhang Y, Liang H.
                                                                 HIF-1alpha inhibition reverses multidrug resistance in colon cancer
                                                         [19]
           CD44 were refractory to sorafenib-induced cell death.    cells via downregulation of MDR1/P-glycoprotein. PLoS One
           In contrast, epithelial-like cells were more sensitive to   2014;9:e98882.
           sorafenib-induced apoptosis. The authors of this study   4.   Rohwer N, Cramer T. Hypoxia-mediated drug resistance: novel
           have proposed that the appearance of a mesenchymal    insights on the functional interaction of HIFs and cell death
           phenotype in tumor cells could be used as a marker to   pathways. Drug Resist Updat 2011;14:191-201.
           predict the lack of response of HCC to sorafenib.   5.   Zhu H, Chen XP, Luo SF, Guan J, Zhang WG, Zhang BX.
                                                                 Involvement of hypoxia-inducible factor-1-alpha in multidrug
                                                                 resistance induced by hypoxia in HepG2 cells. J Exp Clin Cancer
           CONCLUSION                                            Res 2005;24:565-74.
                                                              6.   Daskalow  K,  Rohwer  N,  Raskopf  E,  Dupuy  E,  Kuhl  A,
           In sum, in addition to the classical MOC-1 to MOC-5, two   Loddenkemper C, Wiedenmann B, Schmitz V, Cramer T. Role of
           additional mechanisms of chemoresistance must be      hypoxia-inducible transcription factor 1alpha for progression and
           included in the defensive armamentarium developed     chemosensitivity of murine hepatocellular carcinoma. J Mol Med
           or enhanced in liver cancer cells to overcome the     (Berl) 2010;88:817-27.
           pharmacological attack, MOC-6 and MOC-7, based     7.   Sermeus A, Cosse JP, Crespin M, Mainfroid V, de Longueville
           on changes in tumor microenvironment and EMT,         F, Ninane N, Raes M, Remacle J, Michiels C. Hypoxia induces
           respectively. This accounts for a negligible response   protection against etoposide-induced apoptosis: molecular profiling
                                                                 of changes in gene expression and transcription factor activity. Mol
           to the commonly used antitumor drugs and only a       Cancer 2008;7:27.
           modest response to novel targeted therapies based   8.   Bellot  G,  Garcia-Medina  R,  Gounon  P,  Chiche  J,  Roux  D,
           on TKIs, such as sorafenib. Further advances are      Pouyssegur J, Mazure NM. Hypoxia-induced autophagy is mediated
           urgently needed to better understand the bases of     through hypoxia-inducible factor induction of BNIP3 and BNIP3L
           the chemoresistace barrier, which in the future may   via their BH3 domains. Mol Cell Biol 2009;29:2570-81.
           enlarge the list of MOCs by including for instance   9.   Raghunand N, He X, van Sluis R, Mahoney B, Baggett B, Taylor
           autophagy mechanisms. [27]  This knowledge is required   CW, Paine-Murrieta G, Roe D, Bhujwalla ZM, Gillies RJ.
                                                                 Enhancement of chemotherapy by manipulation of tumour pH. Br J
           to develop new tools able to demolish or inactivate   Cancer 1999;80:1005-11.
           cancer cell defenses against chemotherapy.         10.  De Milito A, Fais S. Tumor acidity, chemoresistance and proton
                                                                 pump inhibitors. Future Oncol 2005;1:779-86.
           Financial support and sponsorship                  11.  Ouar Z, Bens M, Vignes C, Paulais M, Pringel C, Fleury J, Cluzeaud
           This study was supported by the Spanish “Instituto de   F, Lacave R, Vandewalle A. Inhibitors of vacuolar H+-ATPase
           Salud Carlos III” (Grant FIS PI11/00337, PI15/00179   impair the preferential accumulation of daunomycin in lysosomes
                                                                 and reverse the resistance to anthracyclines in drug-resistant renal
           and PI16/00598 cofinanced by FEDER funds), the        epithelial cells. Biochem J 2003;370:185-93.
           “Ministerio de Ciencia e Innovación” (SAF2010-15517   12.  Luciani F, Spada M, De Milito A, Molinari A, Rivoltini L, Montinaro
           and SAF2013-40620-R), the “Junta de Castilla y        A, Marra M, Lugini L, Logozzi M, Lozupone F, Federici C, Iessi E,
           León” (SA015U13 and BIO/SA65/13), the Fundación       Parmiani G, Arancia G, Belardelli F, Fais S. Effect of proton pump
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