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John E Dillberger, Sara Ann McAtee
BACKGROUND: Osteosarcoma is the most common neoplastic disease in Scottish Deerhounds. For Deerhounds, a 2007 population-based study concluded that a single dominant genetic factor largely governed disease risk. For Greyhounds, Rottweilers, and Irish Wolfhounds, a 2013 genome-wide association study found multiple genetic markers in each breed, with each marker only weakly associated with the disease. We obtained from two breeders the pedigrees, age (if alive) or age at death, and osteosarcoma status for two families of Scottish Deerhounds, designated Cohorts K and T...
2017: Canine Genetics and Epidemiology
Sofía Jerez, Héctor Araya, Roman Thaler, M Cristine Charlesworth, Remigio López-Solís, Alexis M Kalergis, Pablo F Céspedes, Amel Dudakovic, Gary S Stein, Andre J van Wijnen, Mario Galindo
Osteosarcomas are the most prevalent bone tumors in pediatric patients, but can also occur later in life. Bone tumors have the potential to metastasize to lung and occasionally other vital organs. To understand how osteosarcoma cells interact with their micro-environment to support bone tumor progression and metastasis, we analyzed secreted proteins and exosomes from three human osteosarcoma cell lines. Exosome isolation was validated by transmission electron microscopy (TEM) and immuno-blotting for characteristic biomarkers (CD63, CD9, and CD81)...
February 2017: Journal of Cellular Biochemistry
Quanhe Qiu, Jing Jiang, Liangbo Lin, Si Cheng, Daqi Xin, Wei Jiang, Jieliang Shen, Zhenming Hu
RSK2 (90 kDa ribosomal S6 kinase) is a downstream effector of the Ras/ERK (extracellular signal-regulated kinase) signaling pathway that has major functions in cell biological activities, including regulating nuclear signaling, cell cycle progression, cell proliferation, cell growth, protein synthesis, cell migration and cell survival, and is expressed in most types of human malignant tumors, including lung cancer, prostate and breast tumors, skin cancer and osteosarcomas (OS). RSK2 was found to be essential for osteosarcoma formation...
June 2016: International Journal of Oncology
Edward T J Rochford, Guruprakash Subbiahdoss, T Fintan Moriarty, Alexandra H C Poulsson, Henny C van der Mei, Henk J Busscher, R Geoff Richards
Polyetheretherketone (PEEK) films were oxygen plasma treated to increase surface free energy and characterized by X-ray photoelectron microscopy, atomic force microscopy, and water contact angles. A parallel plate flow chamber was used to measure Staphylococcus epidermidis, Staphylococcus aureus, and U-2 OS osteosarcomal cell-line adhesion to the PEEK films in separate monocultures. In addition, bacteria and U-2 OS cells were cocultured to model competition between osteoblasts and contaminating bacteria for the test surfaces...
December 2014: Journal of Biomedical Materials Research. Part A
Wenqing Liang, Bo Gao, Peng Fu, Shuogui Xu, Yu Qian, Qingge Fu
Osteosarcoma is an aggressive sarcoma of the bone characterized by a high level of genetic instability and recurrent DNA deletions and amplifications. MicroRNAs (miRNAs) are non-coding small RNAs, usually 18-25 nucleotides in length, which repress translation and cleave mRNA by base-pairing to the 3 untranslated region of the target genes. miRNAs have demonstrated far-reaching effects on the cellular biology of development and cancer. Their role in osteosarcomagenesis remains largely unexplored. A number of reports have investigated the role of microRNAs in osteosarcoma...
January 1, 2013: Frontiers in Bioscience (Landmark Edition)
Dingfeng Li, Qiu Cui, Yaosheng Liu, Xiaohong Wang, Cheng Liu, Shubin Liu, Yanjun Zeng
To summarize the experience in intraarterial neoadjuvant chemotherapy for extremity osteosarcoma. Between January 2002 and December 2007,111 patients with stage IIB extremity osteosarcoma received preoperative intraarterial therapy with subcutaneous implantation of chemotherapy pump as well as en bloc resection, and postoperative adjuvant chemotherapy. There were 63 males and 48 females with an average age of 18 (range, 14 ~ 39 years). The time from symptom onset to hospitalization varied from several days to 6 months...
December 2011: Pathology Oncology Research: POR
Song Zhou, Feng Li, Jun Xiao, Wei Xiong, Zhong Fang, Wenjian Chen, Pengyan Niu
The cancer stem cells (CSCs) from human osteosarcoma by serum-free three-dimensional culture combined with anticancer drugs were isolated and identified. The primary cells derived from human osteosarcoma were digested by trypsin to prepare a single-cell suspension, and mixed homogeneously into 1.2% alginate gel. Single-cell alginate gel was cultured with serum-free DMEM/F12 medium. Epirubicin (0.8 microg/mL) was added to the medium to enrich CSCs. After cultured conventionally for 7 to 10 days, most of cells suspended in alginate gel were killed by epirubicin...
February 2010: Journal of Huazhong University of Science and Technology. Medical Sciences
L Breton, N H Bonneau, M Beauregard
AN OSTEOSARCOMA OF THE FEMORAL DIAPHYSIS ASSOCIATED WITH THE PRESENCE OF A BONE PLATE IN A DOG: A bone tumor which developed in the middle third of the left femur of an Irish Setter, seven years after a metallic plate had been used to reduce a fracture, is described. Through radiographs, the tumor was found to involve the diaphysis of the bone. The histopathology revealed that it was an osteosarcoma. Spontaneous and induced osteosarcomas are compared, and the possible correlation between the development of a tumor of this nature and the use of orthopedic implants is discussed...
November 1984: Canadian Veterinary Journal. la Revue Vétérinaire Canadienne
Takashi Ando, Jiro Ichikawa, Atsushi Okamoto, Kachio Tasaka, Atsuhito Nakao, Yoshiki Hamada
Gemcitabine (dFdCyd) is an analog of cytosine arabinoside with anti-tumor activity in several human cancers. However, the efficacy of this compound in osteosarcoma has not been fully elucidated. Here we assessed the anti-tumor activity of gemcitabine using osteosarcome cell lines. In 9 human osteosarcoma cell lines (G292, HOS, MG63, NY, SaOS, HuO, HuO-3N1, HuO9, HuO9-N2), gemcitabine at the doses of >100 nM showed significant cytotoxicity. In HOS and MG63 cell lines, gemcitabine inhibited DNA synthesis as determined by IdU labeling assay and induced apoptosis as determined by DNA fragmentation assay and May-Giemsa staining...
July 2005: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
R Dziak, B M Yang, B W Leung, S Li, N Marzec, J Margarone, L Bobek
The effects of the lysophospholipids, sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA) were studied in human primary osteoblastic cells and the human osteosarcomal cell lines, G292 and MG-63. The studies focused on the role of the Gi protein in the regulation of S1P and LPA-induced proliferation, the effects of the phospholipids on alkaline phosphatase, an early marker of osteoblastic cell proliferation, and the presence of edg receptors. Proliferation was assessed by 3H-thymidine incorporation...
March 2003: Prostaglandins, Leukotrienes, and Essential Fatty Acids
W Zhang, R Dziak
The effects of tumor necrosis factor alpha (TNF-alpha) on arachidonic acid (AA) metabolism were investigated by prelabeling the human osteoblastic osteosarcoma cell line, G292, with [3H]AA. TNF-alpha differentially stimulates cyclooxygenase and lipoxygenase pathways of AA metabolism in a dose response manner in the cells. The highest concentration of TNF-alpha (10(-8)M) significantly increased the cyclooxygenase pathway, with prostaglandin E2 (PGE2) being a major product. However, at the lowest concentration (10(-10)M) of TNF-alpha, 15-hydroxyeicosatetraenoic acid (HETE) production was significantly increased, with no significant effects on the other identifiable products...
June 1996: Prostaglandins, Leukotrienes, and Essential Fatty Acids
W Zhang, R Dziak
The effects of interleukin-1 alpha (IL-1 alpha) on arachidonic acid (AA) metabolism were studied in the human osteosarcoma cell lines, G292 and SaOS-2. The cells were prelabeled with 3H-arachidonic acid. Radiolabeled metabolites were measured by reversed-phase high-pressure liquid chromatography with a radioactive detector. Indomethacin inhibited prostaglandin E2 (PGE2) production without affecting lipoxygenase (LO) products in G292 cells. In the G292 cells, IL-1 alpha (50 U/ml) induced a 10-fold increase in PGE2 production at all the incubation times tested, and a significant two-fold increase in 5 hydroxyeicosatetraenoic acid (HETE) formation after 48 h...
July 1993: Prostaglandins, Leukotrienes, and Essential Fatty Acids
R Dziak, A Vernillo, B Rifkin
The effects of phenytoin (diphenylhydantoin, DPH) on calcium uptake in osteoblastic cells were studied to elucidate the potential mechanism of action of this antiepileptic drug on bone metabolism. Preincubation of the human osteoblastic osteosarcomal cell line, SaOS-2, and normal rat osteoblastic cells with DPH decreased basal calcium uptake. This inhibition occurred at DPH doses from 0.1 to 50 micrograms/ml. Parathyroid hormone (PTH) and prostaglandin E2 (PGE2) increased calcium uptake in the SaOS-2 cell line...
August 1988: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
S Shapiro, D N Tatakis, R Dziak
Tumor necrosis factor alpha (10(-10) - 10(-8) M) had no effects on cyclic AMP production by the osteoblastic osteosarcomal cells, Saos-2 and G292, or normal rat calvarial cells. The cytokine did, however, inhibit the parathyroid hormone (PTH)-induced effect on cyclic AMP in the Saos-2 and normal rat osteoblastic cells. This inhibitory effect did not occur on prostaglandin E2-induced cyclic AMP increases in the osteoblastic cells. Interleukin-1 (10 U/ml-100 U/ml) did not produce any effect on basal levels or PTH-induced cyclic AMP increases in these cells...
January 1990: Calcified Tissue International
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