cyclin-d1 and Chondrosarcoma
cyclin-d1 has been researched along with Chondrosarcoma* in 5 studies
Other Studies
5 other study(ies) available for cyclin-d1 and Chondrosarcoma
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High-grade myxoinflammatory fibroblastic sarcoma: a report of 23 cases.
We describe 23 cases of high-grade myxoinflammatory fibroblastic sarcoma (MIFS). The patients were 15 women and 8 men, with the age ranging at the time of diagnosis from 39 to 93 years (mean, 64.3 years; median, 66 years). Follow-up was available for 18 patients, of whom 9 developed metastatic disease; 7 of these died. Most tumors showed a predilection for the soft tissues of the extremities, with 14 cases involving the lower limb and 5 the upper extremity. However, in both sites, the acral parts were affected in only 1 case each. Of the 4 remaining tumors, 2 were found in axilla, 1 was found in sacral area, and 1 developed in the scar on the breast, 14 years after previous excision of a mammary carcinoma and subsequent local irradiation. The tumor size ranged from 1.3 cm to as much as 30 cm in the largest dimension with a mean size of 8.3 cm. Histologically, the tumors were characterized by occurrence of 3 types of characteristic cells, including (1) lipoblast-like cells with an ample, distended, mucin-filled cytoplasm compartmentalized by a variable number of intracytoplasmic septa, thus remotely resembling soccer balls; (2) large, polygonal, bizarre ganglion-like cells similar to those seen in the Hodgkin disease, also called Reed-Sternberg-like cells. Within an ample, deeply eosinophilic cytoplasm, there was an oval nucleus with vesicular chromatin and a large, inclusion-like nucleolus. Binucleated, multinucleated, or more pleomorphic forms of these cells were also present; (3) cells with emperipolesis of variable sizes, ranging from very inconspicuous neoplastic cells containing only one to a few engulfed cells to conspicuous large ones having many inflammatory cells, usually polymorphonuclear leukocytes admixed with various numbers of some lymphoid cells, within the cytoplasm. Quite often, we found elements that combined the histologic features of all the above 3 characteristic tumor cell types. In 2 tumors, we found an additional undifferentiated spindle cell sarcoma component, whereas in another tumor, a chondrosarcomatous moiety was evident. For comparison, we studied 10 cases of pleomorphic hyalinizing angiectatic tumor (PHAT) of soft tissues. Based on the identification of morphological changes typical for MIFS within most of the cases of PHAT, we suggest that most cases of PHAT represent examples of MIFS merely having hyaline ectatic vessels. Topics: Adult; Aged; Aged, 80 and over; Chondrosarcoma; Cyclin D1; Female; Fibrosarcoma; Follow-Up Studies; Humans; Hyalin; Immunohistochemistry; Inflammation; Male; Middle Aged; Myxosarcoma; Neoplasm Recurrence, Local; Soft Tissue Neoplasms | 2015 |
Sorafenib induces growth inhibition and apoptosis of human chondrosarcoma cells by blocking the RAF/ERK/MEK pathway.
Chondrosarcoma represents the second most common primary malignant bone tumor causing significant morbidity due to local recurrence and limited treatment options. Conventional cytotoxic chemotherapy has been proven to be largely ineffective to this sarcoma. Here we report that sorafenib is effective in growth inhibition of chondrosarcoma cell lines in vitro.. Chondrosarcoma cell lines (SW1353 and CRL7891) were treated with sorafenib. Flow cytometry, DAPI assay, and Western blotting were employed to determine the effects of sorafenib in inhibitory proliferation and induce apoptosis in chondrosarcoma cells in vitro.. The results showed that sorafenib effectively inhibited cell growth and induced apoptosis in chondrosarcoma cells, which was concurrent with inhibition of the expression of phospho-MEK and phospho-ERK. Further more the expression levels of cyclin D1, Rb and anti-apoptotic proteins Bcl-xl and Mcl-1 significantly reduced, but no changes in Bcl-2 and Bax. We although detected the expression of Akt, JNK, p38 and their respective phosphoprotein, but did not found meaningful changes.. Our findings demonstrate that sorafenib inhibited the Ras/Raf/MAPK pathway in a time- and dose-dependent fashion in chondrosarcoma cell lines SW1353 and CRL7891 and suggest that sorafenib may be a new therapeutic option for patients with chondrosarcoma. Topics: Apoptosis; Apoptosis Regulatory Proteins; Benzenesulfonates; Blotting, Western; Bone Neoplasms; Cell Line, Tumor; Cell Proliferation; Chondrosarcoma; Cyclin D1; Extracellular Signal-Regulated MAP Kinases; Humans; Mitogen-Activated Protein Kinase Kinases; Niacinamide; Phenylurea Compounds; Phosphorylation; Protein Kinase Inhibitors; Proto-Oncogene Proteins c-bcl-2; Pyridines; raf Kinases; Signal Transduction; Sorafenib | 2010 |
IFI16 inhibits tumorigenicity and cell proliferation of bone and cartilage tumor cells.
IFI16 is a member of the interferon-inducible p200-protein family, capable of modulating cell proliferation, and cellular senescence. In this study, these effects of IFI16 were studied in tumor cells derived from bone and cartilage. The level of IFI16 was markedly lower in human osteosarcomas as compared with its level in normal bone. Overexpression of functional IFI16 in human osteosarcoma and chondrosarcoma cell lines markedly inhibited colony formation, and significantly inhibited cell growth, an effect that could be reversed by introduction of gene specific siRNA into tumor cells. These inhibitory effects of IFI16 were associated with upregulation of p21 and inhibition of cyclin E, cyclin D1, c-Myc and Ras. In addition, ectopic expression of IFI16 in tumor cells increased senescence-associated beta-galactosidase and induced a senescence-like phenotype. In view of such effects, IFI16 might be a suitable target for therapeutic intervention in osteosarcoma and chondrosarcoma. Topics: Apoptosis; Bone Neoplasms; Cell Line, Tumor; Cell Proliferation; Cell Transformation, Neoplastic; Chondrosarcoma; Cyclin D1; Cyclin E; Cyclin-Dependent Kinase Inhibitor p21; Gene Expression Regulation, Neoplastic; Humans; Nuclear Proteins; Osteosarcoma; Phosphoproteins; Proto-Oncogene Proteins c-myc; ras Proteins; RNA Interference | 2007 |
Expression and significance of cell cycle-related proteins Cyclin Dl, CDK4, p27, E2F-l and Ets-1 in chondrosarcoma of the jaws.
To elucidate the expression and significance of cell cycle-associated proteins in chondrosarcoma of the jaws, Cyclin Dl, CDK4, p27, E2F-l and Ets-l expressions were examined in chondrosarcoma and osteochondroma of the jaws by immunohistochemical ABC method. The results demonstrated that Cyclin Dl, CDK4, p27, E2F-1 and Ets-1 were positive 75% (15 of 20), 60% (12 of 20), 25% (5 of 20), 65% (13 of 20) and 60% (12 of 20) in chondrosarcoma of the jaws, respectively. There was no remarkable difference in the expression of these proteins among histological grades of the chondrosarcoma (P>0.05). In osteochondroma of the jaws, CDK4 and E2F with an equal positivity of 12.5% (1 of 8), whereas p27 was positive 75% (6 of 8). None of the osteochondroma cases was immunohistochemically positive for Cycin Dl and Ets-1. In addition, the positive rate of Cyclin Dl, CDK4, E2F-l and Ets-1 proteins was significantly higher, whereas p27 was lower in chondrosarcoma than in osteochondroma of the jaws (P<0.05). These data show that the expression of cell cycle regulatory proteins is altered in chondrosarcoma of the jaws: cyclin Dl, CDK4, E2F-1 and Ets-1 are over-expressed and p27 is low-expressed. Topics: Adolescent; Adult; Cell Cycle Proteins; Chi-Square Distribution; Child; Chondrosarcoma; Cyclin D1; Cyclin-Dependent Kinases; DNA-Binding Proteins; E2F Transcription Factors; E2F1 Transcription Factor; Female; Humans; Male; Mandibular Neoplasms; Maxillary Neoplasms; Microfilament Proteins; Middle Aged; Muscle Proteins; Neoplasm Proteins; Osteochondroma; Proto-Oncogene Protein c-ets-1; Proto-Oncogene Proteins; Proto-Oncogene Proteins c-ets; Transcription Factors | 2001 |
Identification of the cyclin D1 gene as a target of activating transcription factor 2 in chondrocytes.
Endochondral bone growth is regulated by the rates of chondrocyte proliferation and differentiation. However, the intracellular mechanisms regulating these processes are poorly understood. Recently, interruption of the gene encoding the transcription factor activating transcription factor 2 (ATF-2) was shown to inhibit proliferation of chondrocytes in mice [Reimold, A. M., et al. (1996) Nature (London) 379, 262-265]. The target genes of ATF-2 that are responsible for this phenotype remain unknown. Here we report that the cyclin D1 gene is a direct target of ATF-2 in chondrocytes. ATF-2 is present in nuclear extracts from chondrogenic cell lines and binds, as a complex with a CRE-binding protein (CREB)/CRE modulator protein, to the cAMP response element (CRE) in the cyclin D1 promoter. Mutation of the cyclin D1 CRE caused a 78% reduction in the activity of the promoter in chondrocytes. Overexpression of ATF-2 in chondrocytes enhanced activity of the cyclin D1 promoter 3. 5-fold. In contrast, inhibition of endogenous ATF-2 or CREB by expression of dominant-negative inhibitors of CREB and ATF-2 significantly reduced the activity of the promoter in chondrocytes through the CRE. In addition, levels of cyclin D1 protein are greatly reduced in the chondrocytes of ATF-2-deficient mice. These data identify the cyclin D1 gene as a direct target of ATF-2 in chondrocytes and suggest that reduced expression of cyclin D1 contributes to the defective cartilage development of these mice. Topics: Activating Transcription Factor 2; Animals; Cartilage; Cell Nucleus; Cells, Cultured; Chondrosarcoma; Cyclic AMP Response Element-Binding Protein; Cyclin D1; Gene Expression Regulation; Leucine Zippers; Mice; Mice, Knockout; Rats; Recombinant Proteins; Transcription Factors; Transfection; Tumor Cells, Cultured | 1999 |