@article {1854,
	title = {Somatic mosaic IDH1 and IDH2 mutations are associated with enchondroma and spindle cell hemangioma in Ollier disease and Maffucci syndrome.},
	journal = {Nat Genet},
	volume = {43},
	year = {2011},
	month = {2011 Dec},
	pages = {1256-61},
	abstract = {<p>Ollier disease and Maffucci syndrome are non-hereditary skeletal disorders characterized by multiple enchondromas (Ollier disease) combined with spindle cell hemangiomas (Maffucci syndrome). We report somatic heterozygous mutations in IDH1 (c.394C>T encoding an R132C substitution and c.395G>A encoding an R132H substitution) or IDH2 (c.516G>C encoding R172S) in 87\% of enchondromas (benign cartilage tumors) and in 70\% of spindle cell hemangiomas (benign vascular lesions). In total, 35 of 43 (81\%) subjects with Ollier disease and 10 of 13 (77\%) with Maffucci syndrome carried IDH1 (98\%) or IDH2 (2\%) mutations in their tumors. Fourteen of 16 subjects had identical mutations in separate lesions. Immunohistochemistry to detect mutant IDH1 R132H protein suggested intraneoplastic and somatic mosaicism. IDH1 mutations in cartilage tumors were associated with hypermethylation and downregulated expression of several genes. Mutations were also found in 40\% of solitary central cartilaginous tumors and in four chondrosarcoma cell lines, which will enable functional studies to assess the role of IDH1 and IDH2 mutations in tumor formation.</p>},
	keywords = {Adult, Case-Control Studies, Cell Line, Tumor, DNA Methylation, Enchondromatosis, Female, Gene Expression Profiling, Gene Expression Regulation, Genome-Wide Association Study, Humans, Isocitrate Dehydrogenase, Male, Middle Aged, Mosaicism, Mutation, Missense, Sequence Analysis, DNA, Transcription, Genetic, Young Adult},
	issn = {1546-1718},
	doi = {10.1038/ng.1004},
	author = {Pansuriya, Twinkal C and van Eijk, Ronald and d{\textquoteright}Adamo, Pio and van Ruler, Maayke A J H and Kuijjer, Marieke L and Oosting, Jan and Cleton-Jansen, Anne-Marie and van Oosterwijk, Jolieke G and Verbeke, Sofie L J and Meijer, Dani{\"e}lle and van Wezel, Tom and Nord, Karolin H and Sangiorgi, Luca and Toker, Berkin and Liegl-Atzwanger, Bernadette and San-Julian, Mikel and Sciot, Raf and Limaye, Nisha and Kindblom, Lars-Gunnar and Daugaard, Soeren and Godfraind, Catherine and Boon, Laurence M and Vikkula, Miikka and Kurek, Kyle C and Szuhai, Karoly and French, Pim J and Bov{\'e}e, Judith V M G}
}
@article {1666,
	title = {Severe X-linked mitochondrial encephalomyopathy associated with a mutation in apoptosis-inducing factor.},
	journal = {Am J Hum Genet},
	volume = {86},
	year = {2010},
	month = {2010 Apr 9},
	pages = {639-49},
	abstract = {<p>We investigated two male infant patients who were given a diagnosis of progressive mitochondrial encephalomyopathy on the basis of clinical, biochemical, and morphological features. These patients were born from monozygotic twin sisters and unrelated fathers, suggesting an X-linked trait. Fibroblasts from both showed reduction of respiratory chain (RC) cIII and cIV, but not of cI activities. We found a disease-segregating mutation in the X-linked AIFM1 gene, encoding the Apoptosis-Inducing Factor (AIF) mitochondrion-associated 1 precursor that deletes arginine 201 (R201 del). Under normal conditions, mature AIF is a FAD-dependent NADH oxidase of unknown function and is targeted to the mitochondrial intermembrane space (this form is called AIF(mit)). Upon apoptogenic stimuli, a soluble form (AIF(sol)) is released by proteolytic cleavage and migrates to the nucleus, where it induces "parthanatos," i.e., caspase-independent fragmentation of chromosomal DNA. In vitro, the AIF(R201 del) mutation decreases stability of both AIF(mit) and AIF(sol) and increases the AIF(sol) DNA binding affinity, a prerequisite for nuclear apoptosis. In AIF(R201 del) fibroblasts, staurosporine-induced parthanatos was markedly increased, whereas re-expression of AIF(wt) induced recovery of RC activities. Numerous TUNEL-positive, caspase 3-negative nuclei were visualized in patient $\#$1{\textquoteright}s muscle, again indicating markedly increased parthanatos in the AIF(R201 del) critical tissues. We conclude that AIF(R201 del) is an unstable mutant variant associated with increased parthanatos-linked cell death. Our data suggest a role for AIF in RC integrity and mtDNA maintenance, at least in some tissues. Interestingly, riboflavin supplementation was associated with prolonged improvement of patient $\#$1{\textquoteright}s neurological conditions, as well as correction of RC defects in mutant fibroblasts, suggesting that stabilization of the FAD binding in AIF(mit) is beneficial.</p>},
	keywords = {Apoptosis, Apoptosis Inducing Factor, Caspase 3, Computer Simulation, Dietary Supplements, DNA Primers, DNA, Mitochondrial, Electron Transport, Female, Fibroblasts, Flavin-Adenine Dinucleotide, Genes, X-Linked, Humans, In Situ Nick-End Labeling, Infant, Newborn, Magnetic Resonance Imaging, Male, Mitochondrial Encephalomyopathies, Muscle, Skeletal, Mutation, Nervous System Diseases, Pedigree, Poly(ADP-ribose) Polymerases, Protein Conformation, Riboflavin, Staurosporine, Twins, Monozygotic},
	issn = {1537-6605},
	doi = {10.1016/j.ajhg.2010.03.002},
	author = {Ghezzi, Daniele and Sevrioukova, Irina and Invernizzi, Federica and Lamperti, Costanza and Mora, Marina and d{\textquoteright}Adamo, Pio and Novara, Francesca and Zuffardi, Orsetta and Uziel, Graziella and Zeviani, Massimo}
}
