isocitrate dehydrogenase/sarkom

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Diagnostic utility of IDH1/2 mutations to distinguish dedifferentiated chondrosarcoma from undifferentiated pleomorphic sarcoma of bone.

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Histologically, it is nearly impossible to distinguish the dedifferentiated component of dedifferentiated chondrosarcoma from undifferentiated pleomorphic sarcoma (UPS) of bone when the low-grade cartilaginous component is absent. Previous studies have revealed that isocitrate dehydrogenase 1 (IDH1)

Squamous cell carcinoma arising in dedifferentiated chondrosarcoma proved by isocitrate dehydrogenase mutation analysis.

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Dedifferentiated chondrosarcoma is a primary bone tumor characterized by the presence of both low-grade cartilaginous and high-grade malignant noncartilaginous components. The high-grade noncartilaginous component is typically a pleomorphic fibroblastic spindle cell sarcoma. Dedifferentiation into a

[Isozymes of NADP-dependent isocitrate dehydrogenase in normal and tumor tissues of various mouse strains and their hybrids].

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Normal tissues of DBA, CBA, CC57W, C3H, Balb/c, SHR mice and F1 hybrids CC57W/DBA appeared to differ in the ratios of mitochondrial and supernatant NADP-dependent isocitrate dehydrogenase (IDH). Tested inbred mice strains CC57W, C3H, SHR, Balb/c contain allelic form Idh-1a of supernatant IDH gene

A study on DNA hydroxymethylation in Kaposi sarcoma and cutaneous angiosarcoma.

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Hydroxymethylation studies on cutaneous vascular tumours, such as classic Kaposi sarcoma (CKS) and cutaneous angiosarcoma (CAS), have not been reported yet. We aimed to investigate the expression of 5-methylcytosine (5-mc), 5-hydroxymethylcytosine (5-hmc), ten-eleven translocation enzyme 2 (TET-2)

Immunohistochemical analysis of 1844 human epithelial and haematopoietic tumours and sarcomas for IDH1R132H mutation.

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OBJECTIVE Mutations in the isocitrate dehydrogenase 1 gene have been identified recently to play a key role in diffuse astrocytoma and oligodendroglioma as well as in acute myeloid leukaemia. In glioma, IDH1R132H is the most common mutation type, which is associated with younger patient age and

The biology and management of cartilaginous tumors: a role for targeting isocitrate dehydrogenase.

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Chondrosarcomas are rare mesenchymal neoplasms defined by the production of abnormal cartilaginous matrix. Conventional chondrosarcoma is the most common histology. The management of primary conventional chondrosarcoma generally is surgical with the possible addition of radiation therapy. Treatment

Current questions in bone sarcomas.

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Osteosarcoma and Ewing sarcoma, the most common primary bone tumours in young people, are curable in most patients. However, these tumours remain a significant challenge due to the complexity and intensity of treatment and its long-term morbidity and the significant proportion of patients in whom

Sarcoma-like tumor originating from oligodendroglioma.

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We present a case of sarcoma occurring at a site of resected oligodendroglioma without preceding radiotherapy or chemotherapy. Oligosarcoma occurring at sites of resected oligodendroglioma or anaplastic oligodendroglioma with sarcomatous components are rare. Although meningioma or sarcoma-like

IDH Mutation Analysis in Ewing Sarcoma Family Tumors.

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BACKGROUND Isocitrate dehydrogenase (IDH) catalyzes the oxidative decarboxylation of isocitrate to yield α-ketoglutarate (α-KG) with production of reduced nicotinamide adenine dinucleotide (NADH). Dysfunctional IDH leads to reduced production of α-KG and NADH and increased production of

Induction of sarcomas by mutant IDH2.

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More than 50% of patients with chondrosarcomas exhibit gain-of-function mutations in either isocitrate dehydrogenase 1 (IDH1) or IDH2. In this study, we performed genome-wide CpG methylation sequencing of chondrosarcoma biopsies and found that IDH mutations were associated with DNA hypermethylation

Insulin-like growth factor I receptor gene is concordant with c-Fes protooncogene and mouse chromosome 7 in somatic cell hybrids.

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The insulin-like growth factor I (IGF-1) mediates the actions of pituitary growth hormone in a variety of tissues. Its receptor (IGF1R) displays considerable structural similarity to the insulin receptor. In humans, the IGF1R gene has been mapped near FES, the cellular counterpart of the feline

Clonality analysis and IDH1 and IDH2 mutation detection in both components of dedifferentiated chondrosarcoma, implicated its monoclonal origin

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Dedifferentiated chondrosarcoma (DDCS) is a highly malignant tumor that belongs to an uncommon subtype of chondrosarcoma with a poor prognosis. Microscopically, it is composed of highly differentiated chondrosarcoma and highly malignant noncartilaginous sarcomas with an abrupt interface. The

The utility of immunohistochemistry for providing genetic information on tumors.

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With advances in immunohistochemical technology and growing knowledge of the molecular genetics of tumors, immunohistochemistry is playing an increasingly important role in providing genetic information for tumors. Specific chromosomal translocations can be demonstrated through detection of the

Evolutionary etiology of high-grade astrocytomas.

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Glioblastoma (GBM), the most common brain malignancy, remains fatal with no effective treatment. Analyses of common aberrations in GBM suggest major regulatory pathways associated with disease etiology. However, 90% of GBMs are diagnosed at an advanced stage (primary GBMs), providing no access to

Sheep gene mapping: additional DNA markers included (CASB, CASK, LALBA, IGF-1 and AMH).

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DNA extracted from 25 hamster-sheep hybrid cell lines was subjected, after Southern blotting, to hybridization with CASB, CASK, LALBA, IGF-1 and AMH cDNA probes. CASB and CASK segregated together and IGF-1 and LALBA were found syntenic with the LDHB-PEPB-TPI-GAPD-SHMT-KRTB group. No other synteny

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