Pathogenesis of Human ACP
Abstract
In 2002 J.T. Rutka stated in an editorial commentary that: “There is perhaps no other primary brain tumour that evokes more passion, emotion, and, as a result, controversy than does the craniopharyngioma”. This statement clarifies the situation of medical specialists such as endocrinologists, neurosurgeons, neuropathologists, neurooncologists, paediatric oncologists and neuro-radiologists involved in treatment of craniopharyngioma (CP) patients. Although CPs are classified by the WHO as benign tumours, their size and relationship to multiple critical structures can incur massive clinical complications. Here we elucidate the histological and genomic hallmarks, setting adamantinomatous (ACP) apart from papillary craniopharyngiomas (PCP). In addition, molecular mechanisms that we already know to be involved in the pathogenesis of ACP, e.g. Wnt, SHH and EGFR signalling influencing proliferation, morphology, migration and recurrence by the establishment of a presumably tumour stem cell niche, are discussed. Our understanding of the driving force of ACP tumourigenesis opens new avenues for targeted treatment options, e.g. the inhibition of the EGFR.
Keywords
Wnt EGFR SHH CD44 CD133 Cytokeratin p21 BMP4 Ki-67 β-catenin mutationReferences
- 1.Rutka JT (2002) Craniopharyngioma. J Neurosurg 97(1):1–2 discussion 2PubMedCrossRefGoogle Scholar
- 2.Louis D, Ohgaki H, Wiestler O, Cavenee W, Ellison D, Figarella-Branger D, et al (2016) WHO classification of tumours of the central nervous system, Revised 4th Edition. IARC, Lyon, pp 324–328. ISBN 978-92-832-4492-9Google Scholar
- 3.Garnett MR et al (2007) Craniopharyngioma. Orphanet J Rare Dis 2(1):1CrossRefGoogle Scholar
- 4.Erdheim J (1904) Über Hypophysenganggeschwülste und Hirncholesteatome. Sitzber. d. k. Akad. Wiss. Wien 113:537–726Google Scholar
- 5.Lindholm J, Nielsen EH (2009) Craniopharyngioma: historical notes. Pituitary 12(4):352–359PubMedCrossRefGoogle Scholar
- 6.Sekine S et al (2002) Craniopharyngiomas of adamantinomatous type harbor beta-catenin gene mutations. Am J Pathol 161(6):1997–2001PubMedPubMedCentralCrossRefGoogle Scholar
- 7.Hölsken A et al (2016) Adamantinomatous and papillary craniopharyngiomas are characterized by distinct epigenomic as well as mutational and transcriptomic profiles. Acta Neuropathol Commun 4(1):1–13CrossRefGoogle Scholar
- 8.Hoffman H (1994) Surgical management of craniopharyngioma. Pediatr Neurosurg 21(Suppl. 1):44–49PubMedGoogle Scholar
- 9.Weiner HL et al (1994) Craniopharyngiomas: a clinicopathological analysis of factors predictive of recurrence and functional outcome. Neurosurgery 35(6):1001–1011PubMedCrossRefGoogle Scholar
- 10.Gupta N, Banerjee A, Haas-Kogan D (2010) Pediatric CNS tumors. Springer, BerlinCrossRefGoogle Scholar
- 11.Miller D (1994) Pathology of craniopharyngiomas: clinical import of pathological findings. Pediatr Neurosurg 21(Suppl. 1):11–17PubMedGoogle Scholar
- 12.Izuora G et al (1988) Childhood intracranial neoplasms Enugu, Nigeria. West Afr J Med 8(3):171–174Google Scholar
- 13.Kuratsu J-I, Ushio Y (1996) Epidemiological study of primary intracranial tumors in childhood. Pediatr Neurosurg 25(5):240–247PubMedCrossRefGoogle Scholar
- 14.Karavitaki N et al (2006) Craniopharyngiomas. Endocr Rev 27(4):371–397PubMedCrossRefGoogle Scholar
- 15.Karavitaki N et al (2005) Craniopharyngiomas in children and adults: systematic analysis of 121 cases with long-term follow-up. Clin Endocrinol 62(4):397–409CrossRefGoogle Scholar
- 16.Bernstein ML, Buchino JJ (1983) The histologic similarity between craniopharyngioma and odontogenic lesions: a reappraisal. Oral Surg Oral Med Oral Pathol 56(5):502–511PubMedCrossRefGoogle Scholar
- 17.Paulus W et al (1997) Odontogenic classification of craniopharyngiomas: a clinicopathological study of 54 cases. Histopathology 30(2):172–176PubMedCrossRefGoogle Scholar
- 18.Sekine S et al (2003) Beta-catenin mutations are frequent in calcifying odontogenic cysts, but rare in ameloblastomas. Am J Pathol 163(5):1707–1712PubMedPubMedCentralCrossRefGoogle Scholar
- 19.Sekine S et al (2004) Expression of enamel proteins and LEF1 in adamantinomatous craniopharyngioma: evidence for its odontogenic epithelial differentiation. Histopathology 45(6):573–579PubMedCrossRefGoogle Scholar
- 20.Seemayer T, Blundell J, Wiglesworth F (1972) Pituitary craniopharyngioma with tooth formation. Cancer 29(2):423–430PubMedCrossRefGoogle Scholar
- 21.Soukup V et al (2008) Dual epithelial origin of vertebrate oral teeth. Nature 455(7214):795–798PubMedCrossRefGoogle Scholar
- 22.Sartoretti-Schefer S et al (1997) MR differentiation of adamantinous and squamous-papillary craniopharyngiomas. AJNR Am J Neuroradiol 18(1):77–87PubMedGoogle Scholar
- 23.Brastianos PK et al (2014) Exome sequencing identifies BRAF mutations in papillary craniopharyngiomas. Nat Genet 46(2):161–165PubMedPubMedCentralCrossRefGoogle Scholar
- 24.Schweizer L et al (2015) BRAF V600E analysis for the differentiation of papillary craniopharyngiomas and Rathke’s cleft cysts. Neuropathol Appl Neurobiol 41(6):733–742PubMedCrossRefGoogle Scholar
- 25.Buslei R et al (2005) Common mutations of beta-catenin in adamantinomatous craniopharyngiomas but not in other tumours originating from the sellar region. Acta Neuropathol 109(6):589–597PubMedCrossRefGoogle Scholar
- 26.Larkin SJ et al (2014) BRAF V600E mutations are characteristic for papillary craniopharyngioma and may coexist with CTNNB1-mutated adamantinomatous craniopharyngioma. Acta Neuropathol 127(6):927–929PubMedPubMedCentralCrossRefGoogle Scholar
- 27.Kim JH, Paulus W, Heim S (2015) BRAF V600E mutation is a useful marker for differentiating Rathke’s cleft cyst with squamous metaplasia from papillary craniopharyngioma. J Neuro-Oncol 123:181–191Google Scholar
- 28.Alomari AK et al (2015) Craniopharyngioma arising in a Rathke’s cleft cyst: case report. J Neurosurg Pediatr 15(3):250–254PubMedCrossRefGoogle Scholar
- 29.Hofmann BM et al (2006) Nuclear beta-catenin accumulation as reliable marker for the differentiation between cystic craniopharyngiomas and rathke cleft cysts: a clinico-pathologic approach. Am J Surg Pathol 30(12):1595–1603PubMedCrossRefGoogle Scholar
- 30.Xu W, Kimelman D (2007) Mechanistic insights from structural studies of beta-catenin and its binding partners. J Cell Sci 120(Pt 19):3337–3344PubMedCrossRefGoogle Scholar
- 31.Behrens J et al (1996) Functional interaction of beta-catenin with the transcription factor LEF-1. Nature 382(6592):638–642PubMedCrossRefGoogle Scholar
- 32.Nelson WJ, Nusse R (2004) Convergence of Wnt, beta-catenin, and cadherin pathways. Science 303(5663):1483–1487PubMedPubMedCentralCrossRefGoogle Scholar
- 33.Lilien J, Balsamo J (2005) The regulation of cadherin-mediated adhesion by tyrosine phosphorylation/dephosphorylation of beta-catenin. Curr Opin Cell Biol 17(5):459–465PubMedCrossRefGoogle Scholar
- 34.Roura S et al (1999) Regulation of E-cadherin/Catenin association by tyrosine phosphorylation. J Biol Chem 274(51):36734–36740PubMedCrossRefGoogle Scholar
- 35.Kemler R (1993) From cadherins to catenins: cytoplasmic protein interactions and regulation of cell adhesion. Trends Genet 9(9):317–321PubMedCrossRefGoogle Scholar
- 36.Behrens J et al (1998) Functional interaction of an axin homolog, conductin, with beta-catenin, APC, and GSK3beta. Science 280(5363):596–599PubMedCrossRefGoogle Scholar
- 37.Rubinfeld B et al (1996) Binding of GSK3beta to the APC-beta-catenin complex and regulation of complex assembly. Science 272(5264):1023–1026PubMedCrossRefGoogle Scholar
- 38.Rubinfeld B et al (1993) Association of the APC gene product with beta-catenin. Science 262(5140):1731–1734PubMedCrossRefGoogle Scholar
- 39.Amit S et al (2002) Axin-mediated CKI phosphorylation of β-catenin at Ser 45: a molecular switch for the Wnt pathway. Genes Dev 16(9):1066–1076PubMedPubMedCentralCrossRefGoogle Scholar
- 40.Provost E et al (2003) Functional correlates of mutations in beta-catenin exon 3 phosphorylation sites. J Biol Chem 278(34):31781–31789PubMedCrossRefGoogle Scholar
- 41.Aberle H et al (1997) beta-catenin is a target for the ubiquitin-proteasome pathway. EMBO J 16(13):3797–3804PubMedPubMedCentralCrossRefGoogle Scholar
- 42.Al-Fageeh M et al (2004) Phosphorylation and ubiquitination of oncogenic mutants of beta-catenin containing substitutions at Asp32. Oncogene 23(28):4839–4846PubMedPubMedCentralCrossRefGoogle Scholar
- 43.Gao C, Chen Y-G (2010) Dishevelled: The hub of Wnt signaling. Cell Signal 22(5):717–727PubMedCrossRefGoogle Scholar
- 44.Liu X, Rubin JS, Kimmel AR (2005) Rapid, Wnt-induced changes in GSK3beta associations that regulate beta-catenin stabilization are mediated by Galpha proteins. Curr Biol 15(22):1989–1997PubMedCrossRefGoogle Scholar
- 45.Müller T et al (2002) Regulation of epithelial cell migration and tumor formation by β-catenin signaling. Exp Cell Res 280(1):119–133PubMedCrossRefGoogle Scholar
- 46.Kato K et al (2004) Possible linkage between specific histological structures and aberrant reactivation of the Wnt pathway in adamantinomatous craniopharyngioma. J Pathol 203(3):814–821PubMedCrossRefGoogle Scholar
- 47.Holsken A et al (2009) Target gene activation of the Wnt signaling pathway in nuclear beta-catenin accumulating cells of adamantinomatous craniopharyngiomas. Brain Pathol 19(3):357–364PubMedCrossRefGoogle Scholar
- 48.Yoshimoto M et al (2004) Comparative genomic hybridization analysis of pediatric adamantinomatous craniopharyngiomas and a review of the literature. J Neurosurg 101(1 Suppl):85–90PubMedGoogle Scholar
- 49.Provost E et al (2005) Functional correlates of mutation of the Asp32 and Gly34 residues of beta-catenin. Oncogene 24(16):2667–2676PubMedCrossRefGoogle Scholar
- 50.Staal FJ et al (2002) Wnt signals are transmitted through N-terminally dephosphorylated β-catenin. EMBO Rep 3(1):63–68PubMedPubMedCentralCrossRefGoogle Scholar
- 51.Legoix P et al (1999) Beta-catenin mutations in hepatocellular carcinoma correlate with a low rate of loss of heterozygosity. Oncogene 18(27):4044–4046PubMedCrossRefGoogle Scholar
- 52.Van Nhieu JT et al (1999) Nuclear accumulation of mutated β-catenin in hepatocellular carcinoma is associated with increased cell proliferation. Am J Pathol 155(3):703–710CrossRefGoogle Scholar
- 53.Huber AH, Nelson WJ, Weis WI (1997) Three-dimensional structure of the armadillo repeat region of beta-catenin. Cell 90(5):871–882PubMedCrossRefGoogle Scholar
- 54.von Kries JP et al (2000) Hot spots in beta-catenin for interactions with LEF-1, conductin and APC. Nat Struct Biol 7(9):800–807CrossRefGoogle Scholar
- 55.Koike M et al (2004) beta-Catenin shows an overlapping sequence requirement but distinct molecular interactions for its bidirectional passage through nuclear pores. J Biol Chem 279(32):34038–34047PubMedCrossRefGoogle Scholar
- 56.Henderson BR et al (2002) Lymphoid enhancer factor-1 blocks adenomatous polyposis coli-mediated nuclear export and degradation of beta-catenin. Regulation by histone deacetylase 1. J Biol Chem 277(27):24258–24264PubMedCrossRefGoogle Scholar
- 57.Wong NACS, Pignatelli M (2002) β-catenin—a linchpin in colorectal carcinogenesis? Am J Pathol 160(2):389–401PubMedPubMedCentralCrossRefGoogle Scholar
- 58.Tao YS et al (1996) beta-Catenin associates with the actin-bundling protein fascin in a noncadherin complex. J Cell Biol 134(5):1271–1281PubMedCrossRefGoogle Scholar
- 59.Hülsken J, Birchmeier W, Behrens J (1994) E-cadherin and APC compete for the interaction with beta-catenin and the cytoskeleton. J Cell Biol 127(6):2061–2069PubMedCrossRefGoogle Scholar
- 60.Krieghoff E, Behrens J, Mayr B (2006) Nucleo-cytoplasmic distribution of beta-catenin is regulated by retention. J Cell Sci 119(Pt 7):1453–1463PubMedCrossRefGoogle Scholar
- 61.Hu T, Li C (2010) Convergence between Wnt-β-catenin and EGFR signaling in cancer. Mol Cancer 9(1):1PubMedPubMedCentralGoogle Scholar
- 62.Sharma M, Chuang WW, Sun Z (2002) Phosphatidylinositol 3-kinase/Akt stimulates androgen pathway through GSK3β inhibition and nuclear β-catenin accumulation. J Biol Chem 277(34):30935–30941PubMedCrossRefGoogle Scholar
- 63.Ulloa F, Itasaki N, Briscoe J (2007) Inhibitory Gli3 activity negatively regulates Wnt/β-catenin signaling. Curr Biol 17(6):545–550PubMedCrossRefGoogle Scholar
- 64.Noubissi FK et al (2009) Wnt signaling stimulates transcriptional outcome of the Hedgehog pathway by stabilizing GLI1 mRNA. Cancer Res 69(22):8572–8578PubMedPubMedCentralCrossRefGoogle Scholar
- 65.Gaston-Massuet C et al (2011) Increased Wingless (Wnt) signaling in pituitary progenitor/stem cells gives rise to pituitary tumors in mice and humans. Proc Natl Acad Sci U S A 108(28):11482–11487PubMedPubMedCentralCrossRefGoogle Scholar
- 66.Prieve MG, Waterman ML (1999) Nuclear localization and formation of β-catenin–lymphoid enhancer factor 1 complexes are not sufficient for activation of gene expression. Mol Cell Biol 19(6):4503–4515PubMedPubMedCentralCrossRefGoogle Scholar
- 67.Holsken A et al (2013) Adamantinomatous craniopharyngiomas express tumor stem cell markers in cells with activated Wnt signaling: further evidence for the existence of a tumor stem cell niche? Pituitary 17:546–556CrossRefGoogle Scholar
- 68.Holsken A et al (2010) Tumour cell migration in adamantinomatous craniopharyngiomas is promoted by activated Wnt-signalling. Acta Neuropathol 119:631–639PubMedCrossRefGoogle Scholar
- 69.Jho EH et al (2002) Wnt/beta-catenin/Tcf signaling induces the transcription of Axin2, a negative regulator of the signaling pathway. Mol Cell Biol 22(4):1172–1183PubMedPubMedCentralCrossRefGoogle Scholar
- 70.Lustig B et al (2002) Negative feedback loop of Wnt signaling through upregulation of conductin/axin2 in colorectal and liver tumors. Mol Cell Biol 22(4):1184–1193PubMedPubMedCentralCrossRefGoogle Scholar
- 71.Lammi L et al (2004) Mutations in AXIN2 cause familial tooth agenesis and predispose to colorectal cancer. Am J Hum Genet 74(5):1043–1050PubMedPubMedCentralCrossRefGoogle Scholar
- 72.Taniguchi K et al (2002) Mutational spectrum of beta-catenin, AXIN1, and AXIN2 in hepatocellular carcinomas and hepatoblastomas. Oncogene 21(31):4863–4871PubMedCrossRefGoogle Scholar
- 73.Liu A, Niswander LA (2005) Bone morphogenetic protein signalling and vertebrate nervous system development. Nat Rev Neurosci 6(12):945–954PubMedCrossRefGoogle Scholar
- 74.Rahman MS et al (2015) TGF-β/BMP signaling and other molecular events: regulation of osteoblastogenesis and bone formation. Bone Res 3:15005PubMedPubMedCentralCrossRefGoogle Scholar
- 75.Takuma N et al (1998) Formation of Rathke's pouch requires dual induction from the diencephalon. Development 125(23):4835–4840PubMedGoogle Scholar
- 76.Treier M et al (1998) Multistep signaling requirements for pituitary organogenesis in vivo. Genes Dev 12(11):1691–1704PubMedPubMedCentralCrossRefGoogle Scholar
- 77.Ohazama A, Tucker A, Sharpe PT (2005) Organized tooth-specific cellular differentiation stimulated by BMP4. J Dent Res 84(7):603–606PubMedCrossRefGoogle Scholar
- 78.Liu F et al (2008) Wnt/β-catenin signaling directs multiple stages of tooth morphogenesis. Dev Biol 313(1):210–224PubMedCrossRefGoogle Scholar
- 79.Thesleff I (2003) Epithelial-mesenchymal signalling regulating tooth morphogenesis. J Cell Sci 116(Pt 9):1647–1648PubMedCrossRefGoogle Scholar
- 80.Kratochwil K et al (1996) Lef1 expression is activated by BMP-4 and regulates inductive tissue interactions in tooth and hair development. Genes Dev 10(11):1382–1394PubMedCrossRefGoogle Scholar
- 81.Buslei R et al (2007) Nuclear beta-catenin accumulation associates with epithelial morphogenesis in craniopharyngiomas. Acta Neuropathol 113(5):585–590PubMedCrossRefGoogle Scholar
- 82.Stache C et al (2015) Insights into the infiltrative behavior of adamantinomatous craniopharyngioma in a new xenotransplant mouse model. Brain Pathol 25(1):1–10PubMedCrossRefGoogle Scholar
- 83.Kim JS et al (2002) Oncogenic beta-catenin is required for bone morphogenetic protein 4 expression in human cancer cells. Cancer Res 62(10):2744–2748PubMedGoogle Scholar
- 84.Vignjevic D et al (2007) Fascin, a novel target of β-catenin-TCF signaling, is expressed at the invasive front of human colon cancer. Cancer Res 67(14):6844–6853PubMedCrossRefGoogle Scholar
- 85.Grothey A et al (2000) C-erbB-2HER-2 upregulates fascin, an actin-bundling protein associated with cell motility, in human breast cancer cell lines. Oncogene 19(42):4864–4875PubMedCrossRefGoogle Scholar
- 86.Hashimoto Y, Skacel M, Adams JC (2005) Roles of fascin in human carcinoma motility and signaling: prospects for a novel biomarker? Int J Biochem Cell Biol 37(9):1787–1804PubMedCrossRefGoogle Scholar
- 87.Mattila PK, Lappalainen P (2008) Filopodia: molecular architecture and cellular functions. Nat Rev Mol Cell Biol 9(6):446–454PubMedCrossRefGoogle Scholar
- 88.Kim SJ et al (2010) Galectin-3 increases gastric cancer cell motility by up-regulating fascin-1 expression. Gastroenterology 138(3):1035–1045 e2PubMedCrossRefGoogle Scholar
- 89.Hashimoto Y et al (2006) Prognostic significance of fascin expression in advanced colorectal cancer: an immunohistochemical study of colorectal adenomas and adenocarcinomas. BMC Cancer 6(1):1CrossRefGoogle Scholar
- 90.Yoder BJ et al (2005) The expression of fascin, an actin-bundling motility protein, correlates with hormone receptor–negative breast cancer and a more aggressive clinical course. Clin Cancer Res 11(1):186–192PubMedGoogle Scholar
- 91.Civenni G, Holbro T, Hynes NE (2003) Wnt1 and Wnt5a induce cyclin D1 expression through ErbB1 transactivation in HC11 mammary epithelial cells. EMBO Rep 4(2):166–171PubMedPubMedCentralCrossRefGoogle Scholar
- 92.Yu W-H et al (2002) CD44 anchors the assembly of matrilysin/MMP-7 with heparin-binding epidermal growth factor precursor and ErbB4 and regulates female reproductive organ remodeling. Genes Dev 16(3):307–323PubMedPubMedCentralCrossRefGoogle Scholar
- 93.Lu Z et al (2003) Downregulation of caveolin-1 function by EGF leads to the loss of E-cadherin, increased transcriptional activity of β-catenin, and enhanced tumor cell invasion. Cancer Cell 4(6):499–515PubMedCrossRefGoogle Scholar
- 94.Schroeder JA et al (2002) ErbB-β-catenin complexes are associated with human infiltrating ductal breast and murine mammary tumor virus (MMTV)-Wnt-1 and MMTV-c-Neu transgenic carcinomas. J Biol Chem 277(25):22692–22698PubMedCrossRefGoogle Scholar
- 95.Holsken A et al (2011) EGFR signaling regulates tumor cell migration in craniopharyngiomas. Clin Cancer Res 17:4367–4377PubMedCrossRefGoogle Scholar
- 96.Roskoski R (2004) The ErbB/HER receptor protein-tyrosine kinases and cancer. Biochem Biophys Res Commun 319(1):1–11PubMedCrossRefGoogle Scholar
- 97.Herbst RS (2004) Review of epidermal growth factor receptor biology. Int J Radiat Oncol Biol Phys 59(2):S21–S26CrossRefGoogle Scholar
- 98.Zhang X et al (2006) An allosteric mechanism for activation of the kinase domain of epidermal growth factor receptor. Cell 125(6):1137–1149PubMedCrossRefGoogle Scholar
- 99.Laurent-Puig P, Lievre A, Blons H (2009) Mutations and response to epidermal growth factor receptor inhibitors. Clin Cancer Res 15(4):1133–1139PubMedCrossRefGoogle Scholar
- 100.Gan HK, Kaye AH, Luwor RB (2009) The EGFRvIII variant in glioblastoma multiforme. J Clin Neurosci 16(6):748–754PubMedCrossRefGoogle Scholar
- 101.Willmore-Payne C, Holden JA, Layfield LJ (2006) Detection of EGFR-and HER2-activating mutations in squamous cell carcinoma involving the head and neck. Mod Pathol 19(5):634–640PubMedCrossRefGoogle Scholar
- 102.Gump JM et al (2015) Identification of targets for rational pharmacological therapy in childhood craniopharyngioma. Acta Neuropathol Commun 3:30PubMedPubMedCentralCrossRefGoogle Scholar
- 103.Andoniadou CL et al (2012) Identification of novel pathways involved in the pathogenesis of human adamantinomatous craniopharyngioma. Acta Neuropathol 124(2):259–271PubMedPubMedCentralCrossRefGoogle Scholar
- 104.Iyer AKV et al (2008) Cell surface restriction of EGFR by a tenascin cytotactin-encoded EGF-like repeat is preferential for motility-related signaling. J Cell Physiol 214(2):504–512PubMedPubMedCentralCrossRefGoogle Scholar
- 105.Swindle CS et al (2001) Epidermal growth factor (EGF)-like repeats of human tenascin-C as ligands for EGF receptor. J Cell Biol 154(2):459–468PubMedPubMedCentralCrossRefGoogle Scholar
- 106.Burghaus S et al (2010) A tumor-specific cellular environment at the brain invasion border of adamantinomatous craniopharyngiomas. Virchows Arch 456(3):287–300PubMedCrossRefGoogle Scholar
- 107.Sarubi J et al (2001) Clonal composition of human adamantinomatous craniopharyngiomas and somatic mutation analyses of the patched (PTCH), Gsα and Gi2α genes. Neurosci Lett 310(1):5–8PubMedCrossRefGoogle Scholar
- 108.Gomes DC et al (2015) Sonic Hedgehog pathway is upregulated in adamantinomatous craniopharyngiomas. Eur J Endocrinol 172(5):603–608PubMedCrossRefGoogle Scholar
- 109.Treier M et al (2001) Hedgehog signaling is required for pituitary gland development. Development 128(3):377–386PubMedGoogle Scholar
- 110.Palma V et al (2005) Sonic hedgehog controls stem cell behavior in the postnatal and adult brain. Development 132(2):335–344PubMedCrossRefGoogle Scholar
- 111.Athar M et al (2006) Hedgehog signalling in skin development and cancer. Exp Dermatol 15(9):667–677PubMedCrossRefGoogle Scholar
- 112.Dassule HR et al (2000) Sonic hedgehog regulates growth and morphogenesis of the tooth. Development 127(22):4775–4785PubMedGoogle Scholar
- 113.Taipale J, Beachy PA (2001) The Hedgehog and Wnt signalling pathways in cancer. Nature 411(6835):349–354PubMedCrossRefGoogle Scholar
- 114.Gulino A, Ferretti E, De Smaele E (2009) Hedgehog signalling in colon cancer and stem cells. EMBO Mol Med 1(6–7):300–302PubMedPubMedCentralCrossRefGoogle Scholar
- 115.di Magliano MP, Hebrok M (2003) Hedgehog signalling in cancer formation and maintenance. Nat Rev Cancer 3(12):903–911CrossRefGoogle Scholar
- 116.Stache C et al (2014) Tight junction protein claudin-1 is differentially expressed in craniopharyngioma subtypes and indicates invasive tumor growth. Neuro-Oncology 16(2):256–264PubMedCrossRefGoogle Scholar
- 117.Saegusa M et al (2004) β-catenin simultaneously induces activation of the p53-p21WAF1 pathway and overexpression of cyclin D1 during squamous differentiation of endometrial carcinoma cells. Am J Pathol 164(5):1739–1749PubMedPubMedCentralCrossRefGoogle Scholar
- 118.Tateyama H et al (2001) Different Keratin Profilesin Craniopharyngioma Subtypes and Ameloblastomas. Pathol Res Pract 197(11):735–742PubMedCrossRefGoogle Scholar
- 119.Moll R (1993) Cytokeratins as markers of differentiation. Expression profiles in epithelia and epithelial tumors. Veroff Pathol 142:1–197PubMedGoogle Scholar
- 120.Chu P, Weiss L (2002) Keratin expression in human tissues and neoplasms. Histopathology 40(5):403–439PubMedCrossRefGoogle Scholar
- 121.Blumenberg M (1988) Concerted gene duplications in the two keratin gene families. J Mol Evol 27(3):203–211PubMedCrossRefGoogle Scholar
- 122.JACKSON BW et al (1980) Formation of cytoskeletal elements during mouse embryogenesis. Differentiation 17(1–3):161–179PubMedCrossRefGoogle Scholar
- 123.Markey AC et al (1991) Expression of simple epithelial keratins 8 and 18 in epidermal neoplasia. J Invest Dermatol 97(5):763–770PubMedCrossRefGoogle Scholar
- 124.Mariadason JM et al (2001) Down-regulation of β-catenin TCF signaling is linked to colonic epithelial cell differentiation. Cancer Res 61(8):3465–3471PubMedGoogle Scholar
- 125.Naishiro Y et al (2001) Restoration of epithelial cell polarity in a colorectal cancer cell line by suppression of β-catenin/T-cell factor 4-mediated gene transactivation. Cancer Res 61(6):2751–2758PubMedGoogle Scholar
- 126.Behrens J et al (1993) Loss of epithelial differentiation and gain of invasiveness correlates with tyrosine phosphorylation of the E-cadherin/beta-catenin complex in cells transformed with a temperature-sensitive v-SRC gene. J Cell Biol 120(3):757–766PubMedCrossRefGoogle Scholar
- 127.Brabletz T et al (2001) Variable beta-catenin expression in colorectal cancers indicates tumor progression driven by the tumor environment. Proc Natl Acad Sci U S A 98(18):10356–10361PubMedPubMedCentralCrossRefGoogle Scholar
- 128.Jamora C et al (2003) Links between signal transduction, transcription and adhesion in epithelial bud development. Nature 422(6929):317–322PubMedPubMedCentralCrossRefGoogle Scholar
- 129.Liu D et al (2001) E-cadherin expression associated with differentiation and prognosis in patients with non–small cell lung cancer. Ann Thorac Surg 71(3):949–954PubMedCrossRefGoogle Scholar
- 130.Owens DW et al (2000) E-cadherin at the cell periphery is a determinant of keratinocyte differentiation in vitro. Biochem Biophys Res Commun 269(2):369–376PubMedCrossRefGoogle Scholar
- 131.Schipper J, Unger A, Jahnke K (1994) E-cadherin as a functional marker of the differentiation and invasiveness of squamous cell carcinoma of the head and neck. Clin Otolaryngol Allied Sci 19(5):381–384PubMedCrossRefGoogle Scholar
- 132.Preda V et al (2015) The Wnt signalling cascade and the adherens junction complex in craniopharyngioma tumorigenesis. Endocr Pathol 26(1):1–8PubMedCrossRefGoogle Scholar
- 133.Qi ST et al (2012) Epithelial–mesenchymal transition and clinicopathological correlation in craniopharyngioma. Histopathology 61(4):711–725PubMedCrossRefGoogle Scholar
- 134.Mimeault M, Batra SK (2010) Frequent deregulations in the hedgehog signaling network and cross-talks with the epidermal growth factor receptor pathway involved in cancer progression and targeted therapies. Pharmacol Rev 62(3):497–524PubMedPubMedCentralCrossRefGoogle Scholar
- 135.Reya T, Clevers H (2005) Wnt signalling in stem cells and cancer. Nature 434(7035):843–850PubMedCrossRefGoogle Scholar
- 136.Reya T et al (2001) Stem cells, cancer, and cancer stem cells. Nature 414(6859):105–111PubMedCrossRefGoogle Scholar
- 137.Garcia-Lavandeira M et al (2012) Craniopharyngiomas express embryonic stem cell markers (SOX2, OCT4, KLF4, and SOX9) as pituitary stem cells but do not coexpress RET/GFRA3 receptors. J Clin Endocrinol Metab 97(1):E80–E87PubMedCrossRefGoogle Scholar
- 138.Tena-Suck ML et al (2009) Expression of epithelial cell adhesion molecule and pituitary tumor transforming gene in adamantinomatous craniopharyngioma and its correlation with recurrence of the tumor. Ann Diagn Pathol 13(2):82–88PubMedCrossRefGoogle Scholar
- 139.Demir R et al (2009) Malignant progression of invasive tumour cells seen in hypoxia present an accumulation of β-catenin in the nucleus at the tumour front. Exp Mol Pathol 87(2):109–116PubMedCrossRefGoogle Scholar
- 140.Brabletz T et al (2001) Variable β-catenin expression in colorectal cancers indicates tumor progression driven by the tumor environment. Proc Natl Acad Sci 98(18):10356–10361PubMedPubMedCentralCrossRefGoogle Scholar
- 141.Herbst RS, Fukuoka M, Baselga J (2004) Gefitinib—a novel targeted approach to treating cancer. Nat Rev Cancer 4(12):979–987CrossRefGoogle Scholar
- 142.Bartels U (2012) Intracystic therapies for cystic craniopharyngioma in childhood. Front Endocrinol (Lausanne) 3:39Google Scholar