Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0029463 (osteosarcoma)
 16,637 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

We have demonstrated for the first time that the steroid metabolite, 2-methoxyestradiol (2-ME) is a powerful growth inhibitor of human osteosarcoma 143 B cell line by pleiotropic mechanisms involving cell cycle arrest at two different points and apoptosis. The ability of 2-ME to inhibit cell cycle at the respective points has been found concentration dependent. 1 microM 2-ME inhibited cell cycle at G1 phase while 10 microM 2-ME caused G2/M cell cycle arrest. As a natural estrogen metabolite 2-ME is expected to perturb the stability of microtubules (MT) in vivo analogously to Taxol--the MT binding anticancer agent. Contrary to 2-ME, Taxol induced accumulation of osteosarcoma cells in G2/M phase of cell cycle only. The presented data strongly suggest two different mechanisms of cytotoxic action of 2-ME at the level of a single cell.
Acta Biochim Pol 2002
PMID:Dual effect of 2-methoxyestradiol on cell cycle events in human osteosarcoma 143B cells. 1213 57

The effects of inhibitors of plasma membrane NADPH oxidase on menadione-induced cell injury processes were studied using human osteosarcoma 143B cells. The intracellular level of superoxide in the cells treated with menadione for 6 h reached a maximum followed by an abrupt decrease. The population of apoptotic cells detected by Annexin V and propidium iodide double staining also reached its maximum at 6 h of menadione-treatment while that of necrotic cells increased continuously reaching 90% of the total population at 9 h of the treatment. Pretreatment of the cells with inhibitors of NADPH oxidase, including diphenyliodonium chloride, apocynin, N-vanillylnonanamide and staurosporine was effective in lowering the menadione-induced elevations of superoxide, and also in the suppression of the switch of the cell death mode from apoptosis to necrosis in menadione-treated cells except for the case of staurosporine. These results strongly suggest that superoxide generated by NADPH oxidase, besides that generated by the mitochondria, may contribute to the remarkable increase in the intracellular level of superoxide in the cells treated with menadione for 6 h resulting in the switch from apoptosis to necrosis, although a direct evidence of the presence of active and inactive forms of NADPH oxidase in control and menadione-treated 143B cells is lacking at present.
Acta Biochim Pol 2004
PMID:A possible involvement of plasma membrane NAD(P)H oxidase in the switch mechanism of the cell death mode from apoptosis to necrosis in menadione-induced cell injury. 1562 73

Characterization of free radical-induced cell injury processes of placenta cells is of vital importance for clinical medicine for the maintenance of intrauterine fetal life. The present study has analyzed cell injury processes in cells of the choriocarcinoma cell line JAR treated with menadione, an anticancer drug, and H(2)O(2) in comparison to osteosarcoma 143B cells using electron microscopic and flow cytometric techniques. Flow cytometry on JAR cells exposed to 100 muM menadione and double-stained with Annexin V and propidium iodide (PI) detected apoptotic cells reaching the maximum after 4 h of incubation with a rapid decrease thereafter. Viable cells became decreased to 46% of the control after 2 h of incubation, reaching 5% after 4 h. Cells stainable with both Annexin V and PI began to increase distinctly after 2 h of incubation, reaching 55% after 4 h. Electron microscopy showed that cells stainable with both dyes specified above had condensed nuclei and swollen cytoplasm, suggesting that they were undergoing a switch of the cell death mode from apoptosis to necrosis. On the other hand, 90% of 143B cells remained intact after 4 h of menadione treatment although the intracellular levels of superoxide were always higher than those of JAR cells treated with the drug. In contrast, JAR cells were more resistant than 143B cells to H(2)O(2)-induced cytotoxicity. These results may suggest that cytotoxicity of menadione cannot be explained simply by oxygen free radicals generated from the drug. The resistance of JAR cells to oxygen free radical-induced cytotoxicity may be advantageous for intrauterine fetal life.
Acta Biochim Pol 2004
PMID:Partial characterization of human choriocarcinoma cell line JAR cells in regard to oxidative stress. 1562 74

The authors present a case of rare laryngeal neoplasm--osteosarcoma, which generated many diagnostic and treatment difficulties. Its main cause was nonspecific symptoms and laryngoscopic view, positive tuberculous history and positive tuberculosis tests. The first histopathological examination was "angioleiomyoma exulcerans, chronic inflammation and granulation." No cancer nor tuberculosis was found". After the physiologic consultations and with positive tuberculin test the tuberculocidal treatment was applied, but it bought no success. The larynx was split then, intraoperative histopathological examination gave the result: "Cellulae carcinomatosae". The total laryngectomy was performed. Postoperative immunohistochemical examination was "Osteosarcoma of larynx". The patient was not evaluated for radio- or chemotherapy. Admitted to the hospital after 5 months with neck tumor and reactional lymph nodes by the right side of the neck. Crile's operation was performed. During the postoperative course some metastatic lymph nodes on the left side of the neck and in lungs were detected. Patient noted to chemotherapy.
Otolaryngol Pol 2005
PMID:[Osteosarcoma of the larynx]. 1609 4

Sarcomas of head and neck are very rare and comprise about 10 to 15% of all malignant nonepithelial neoplasms. A case of 22-year old patient with sinonasal osteosarcoma was presented. The authors stressed the significance of CT in the diagnostic procedures. The preoperative symptoms, histological character of the tumor and postoperative status were shown and discussed. Patient was treated by combined method: the surgical excision and radio-chemotherapy. The 24 months follow-up period was free of symptoms.
Pol Merkur Lekarski 2005 Sep
PMID:[The rare case of sinonasal osteosarcoma in a 22-year-old patient (case report)]. 1635 98

Primary osteogenic sarcoma of the spine is a very rare tumor. A case of osteosarcoma of the lumbar spine in a 22-year-old man is presented. Diagnosis was obtained by an open biopsy. Tumor was resected. The clinical and radiological pre and postoperative findings are described.
Chir Narzadow Ruchu Ortop Pol 2005
PMID:[Osteosarcoma of the lumbar spine--a case report]. 1687 89

The bones tumors represent in orthopedic surgery frequently affection. Among the most often diagnosed primary malignant bones tumors there are: osteosarcoma, chondrosarcoma, gigantocellular tumour of the bone, the Ewing sarcoma. Nearly 35% patients, who start their treatment, have unfortunately, disseminated neoplastic illness (metastases). The much bigger problem (25 times often find than primary neoplasms) are metastatic tumours direct to the bones. Inspite of accessible widespread therapeutic spectrum (multidrugs chemotherapy, surgical tumors' resection, radiotherapy, interferon, genic therapy) five years patients' survival are observed only in small percentage. Therefore, there is a requirement to find more effective and also less invasive method of treatment. The submission of this method seems to be photodynamic therapy (PDT). PDT based on the cytotoxic activity of the laser light and photosensitizer on the neoplastic tissue. Nowdays, there are accepted lines of conduction and closely characterized the indications to PDT in neoplastic diseases. Based on a high grade of efficiency, and also selectivity of PDT, it seems very purposeful to make the investigations about possibilities of PDT in the neoplastic tumours in orthopedics.
Chir Narzadow Ruchu Ortop Pol
PMID:[The opportunities of the photodynamic therapy (PDT) in bones' tumours treatment]. 1794 83

We present a rare case of an aggressive form of chondroblastoma arising from proximal radius. Because of an initial histopathologic diagnosis of paraosteal osteosarcoma, the patient was treated with preoperative chemotherapy and afterwards a local tumor resection with one half of proximal radius was performed. A final histopathologic examination revealed typical benign chondroblastoma. We discuss the rare localisation of chondroblastoma and its differential diagnosis with surface osteosarcoma.
Chir Narzadow Ruchu Ortop Pol
PMID:[An aggressive chondroblastoma mimicking paraosteal osteosarcoma]. 1807 82

The goal of diabetes mellitus treatment is to maintain long-term near-normoglycaemia to prevent the onset or progression of long-term complications. In order to achieve tight glycaemic control and improve the quality of life for diabetic patients, a number of novel insulin preparations, insulin analogues, have been constructed thanks to recombinant DNA technologies and advanced protein chemistry. Because structurally modified insulins may differ from human insulin not only in metabolic but also in mitogenic potencies there were concerns raised about the possibility of increased insulin analogue proliferative action or tumourigenesis. In vitro and in vivo studies on insulin analogues in comparison to endogenous insulin have been performed to closely monitor the insulin analogue action profiles. Insulin glargine was the only one presenting a significant increase in affinity to insulin-like growth factor type 1 (IGF-1) receptor. However, there was controversy regarding the safety of insulin glargine use because of its potential risk of mitogenicity but it proved to be true only for human osteosarcoma cells Saos/B10. Outcomes of the studies performed on lines other than cancer cells and on animals did not present any increased mitogenic activity nor mitogenic potency of insulin glargine in comparison to human insulin.
Endokrynol Pol
PMID:Mitogenic potency of insulin glargine. 1922 3

The study presents clinical and diagnostic problems in patients with malignant bone metaplasia. Material is composed of 13 patients treated surgically between april 2002 and august 2007. In three cases tumors were localised in tibia, in 5 patients around distal femur, in 2 in pelvis, in 2 in humerus and in 1 in lumbar spine. None of the patients has had recurrence by february 2006 r, 12 patients have been free of the disease so far. However, one individual diagnosed with giant cell tumor metaplasia to osteosarcoma did not accept proposed therapy. The authors have particularly emphasized thorough clinical and radiological evaluation and the need of team work before surgical procedure.
Chir Narzadow Ruchu Ortop Pol
PMID:[Clinical and radiological evaluation of malignant metaplasia of benign primary bone tumors on the material of University Orthopaedic Department of Szczecin between 2002-2007]. 1951 79


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