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| There are no established causes for glioma. | | There are no established causes for glioma. |
| ==Causes== | | ==Causes== |
| * Genetic factors
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| :* [[Genetic disorders]]: [[neurofibromatosis]] (type 1 and type 2) and [[tuberous sclerosis complex]]<ref>{{cite journal|last=Reuss|first=D|author2=von Deimling, A|title=Hereditary tumor syndromes and gliomas.|journal=Recent results in cancer research. Fortschritte der Krebsforschung. Progres dans les recherches sur le cancer|year=2009|volume=171|pages=83–102|pmid=19322539|doi=10.1007/978-3-540-31206-2_5}}</ref>
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| :* DNA damages/mutations
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| ::* Epigenetic repression of DNA repair genes is often found in progression to [[Cancer#Heredity|sporadic]] [[glioblastoma]]. For instance, [[methylation]] of the DNA repair gene O-6-methylguanine-DNA methyltransferase(MGMT) Promoter was observed in 51.3% to 66% of glioblastoma specimens.<ref name="pmid22672670">{{cite journal |author=Skiriute D, Vaitkiene P, Saferis V, Asmoniene V, Skauminas K, Deltuva VP, Tamasauskas A |title=MGMT, GATA6, CD81, DR4, and CASP8 gene promoter methylation in glioblastoma |journal=BMC Cancer |volume=12 |issue= |pages=218 |year=2012 |pmid=22672670 |pmc=3404983 |doi=10.1186/1471-2407-12-218 |url=http://www.biomedcentral.com/1471-2407/12/218}}</ref><ref name=Spiegel>{{cite journal |author=Spiegl-Kreinecker S, Pirker C, Filipits M, Lötsch D, Buchroithner J, Pichler J, Silye R, Weis S, Micksche M, Fischer J, Berger W |title=O6-Methylguanine DNA methyltransferase protein expression in tumor cells predicts outcome of temozolomide therapy in glioblastoma patients |journal=Neuro-oncology |volume=12 |issue=1 |pages=28–36 |date=January 2010 |pmid=20150365 |pmc=2940563 |doi=10.1093/neuonc/nop003 |url=http://neuro-oncology.oxfordjournals.org/cgi/pmidlookup?view=long&pmid=20150365}}</ref>
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| ::* Epigenetic reductions in expression of another DNA repair protein, ERCC1, were found in an assortment of 32 gliomas.<ref name="pmid19626585">{{cite journal |author=Chen HY, Shao CJ, Chen FR, Kwan AL, Chen ZP |title=Role of ERCC1 promoter hypermethylation in drug resistance to cisplatin in human gliomas |journal=Int. J. Cancer |volume=126 |issue=8 |pages=1944–54 |date=April 2010 |pmid=19626585 |doi=10.1002/ijc.24772 |url=http://dx.doi.org/10.1002/ijc.24772}}</ref>
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| ::* Mutations in gliomas frequently occur in either [[isocitrate dehydrogenase]] (IDH) 1 or 2 genes. One of these mutations (mostly in IDH1) occurs in about 80% of low grade gliomas and secondary high-grade gliomas.<ref name=Cohen>{{cite journal |author=Cohen AL, Holmen SL, Colman H |title=IDH1 and IDH2 mutations in gliomas |journal=Curr Neurol Neurosci Rep |volume=13 |issue=5 |pages=345 |date=May 2013 |pmid=23532369 |doi=10.1007/s11910-013-0345-4 |url=http://dx.doi.org/10.1007/s11910-013-0345-4 |pmc=4109985}}</ref>
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| * [[Cytomegalovirus]]<ref>{{cite journal|authors=Michaelis M, Baumgarten P, Mittelbronn M, Driever PH, Doerr HW, Cinatl J, Jr |title=Oncomodulation by human cytomegalovirus: novel clinical findings open new roads.|journal=Medical microbiology and immunology|date=February 2011|volume=200|issue=1|pages=1–5|pmid=20967552|doi=10.1007/s00430-010-0177-7}}</ref><ref>{{cite journal|last=Barami|first=K|title=Oncomodulatory mechanisms of human cytomegalovirus in gliomas.|journal=Journal of Clinical Neuroscience |date=July 2010|volume=17|issue=7|pages=819–23|pmid=20427188|doi=10.1016/j.jocn.2009.10.040}}</ref><ref>{{cite journal|journal=Neuro Oncol |date=Mar 2012 |volume=14 |issue=3 |pages=246–55 |doi=10.1093/neuonc/nor227 |title=Consensus on the role of human cytomegalovirus in glioblastoma |authors=Dziurzynski K, Chang SM, Heimberger AB, Kalejta RF, McGregor Dallas SR, Smit M, Soroceanu L, Cobbs CS; HCMV and Gliomas Symposium |pmid=22319219 |pmc=3280809 }}</ref>
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| ==References== | | ==References== |
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| [[Category:Types of cancer]] | | [[Category:Types of cancer]] |
| [[Category:Neurosurgery]] | | [[Category:Neurosurgery]] |
| [[Category:Needs content]]
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