Minglei Zhang^*, Dapeng Wang^†, Tongtong Zhu^*, Ruofeng Yin^*

Oncology Research, Vol.25, No.1, pp. 75-81, 2017, DOI:10.3727/096504016X14719078133401

Abstract MicroRNAs (miRNAs) are small conserved RNAs regulating specific target genes in posttranscriptional levels. They have been involved in multiple processes of tumor progression, including cell proliferation. miR-214-5p (also miR-214*) is a newly identified miRNA, and its functions are largely unknown. In this study, we explore the role of miR-214-5p in the proliferation and invasion of human osteosarcoma (OS) cells. The results showed that miR-214-5p was sharply reduced in OS tissues and cell lines, compared with normal tissues and cell lines. In addition, the miR-214-5p mimic greatly increased the miR-214-5p level and significantly decreased the proliferation More >

Feng Jiang^*1, Yan Shi^†1, Hong Lu^†, Guojun Li^*

Oncology Research, Vol.24, No.5, pp. 381-389, 2016, DOI:10.3727/096504016X14685034103392

Abstract Armadillo repeat-containing protein 8 (ARMC8) plays an important role in regulating cell migration, proliferation, tissue maintenance, signal transduction, and tumorigenesis. However, the expression pattern and role of ARMC8 in osteosarcoma are still unclear. In this study, our aims were to examine the effects of ARMC8 on osteosarcoma and to explore its underlying mechanism. Our results demonstrated that ARMC8 was overexpressed in osteosarcoma cell lines. Knockdown of ARMC8 significantly inhibited osteosarcoma cell proliferation in vitro and markedly inhibited xenograft tumor growth in vivo. ARMC8 silencing also suppressed the epithelial– mesenchymal transition (EMT) phenotype, as well as More >

Yu Wang^*†1, Hui Leng^†1, Hui Chen^*‡, Lei Wang^*, Nan Jiang^*, Xin Huo^†, Bin Yu^*

Oncology Research, Vol.24, No.5, pp. 361-369, 2016, DOI:10.3727/096504016X14685034103310

Abstract Ubiquitin-conjugating enzyme E2T (UBE2T), a member of the E2 family, was found to be overexpressed in a great many cancers such as bladder cancer, lung cancer, and prostate cancer. However, there have been no reports on the role of UBE2T in osteosarcoma. In this study, we tried to make the effects of UBE2T on osteosarcoma clear. The study results showed that UBE2T was overexpressed in osteosarcoma tissues and cell lines. Moreover, UBE2T knockdown inhibited osteosarcoma cell proliferation, migration, and invasion. We also observed that UBE2T downregulation could suppress the activity of the PI3K/Akt signaling pathway. More >

Sheng Li, Zhengli Cui, Xianfeng Meng

Oncology Research, Vol.24, No.4, pp. 279-286, 2016, DOI:10.3727/096504016X14666990347554

Abstract Poly(ADP-ribose) polymerase 1 (PARP-1) is reported to be involved in DNA repair and is now recognized as a key regulator in carcinogenesis. However, the potential role and the molecular mechanism underlying the effect of PARP-1 on osteosarcoma (OS) cells have not been elucidated. In this study, the results showed that knockdown of PARP-1 resulted in decreased cell proliferation, increased cell apoptosis, and G₀/G₁ phase arrest in U2OS cells. In addition, increased expression of active caspase 3 and Bax, but reduced Bcl-2, cyclin D1, and phosphorylated extracellular signal regulated kinase 1/2 (pERK1/2) were observed in PARP-1 knockdown More >

Kevin J. Flynn^1,*, Hristos Z. Kaimakliotis^1,*, Liang Cheng², Chandru P. Sundaram¹

Canadian Journal of Urology, Vol.22, No.4, pp. 7929-7931, 2015

Abstract Primary renal extra-osseous osteosarcoma is an exceedingly rare and deadly kidney neoplasm with only 27 reported cases to date. Extra-osseous osteosarcoma is a mesenchymal sarcoma that produces osteoid, but has no skeletal or periosteal involvement and most commonly arises in the lower extremities. Yet, it can arise in other locations such as the kidney. Extra-osseous osteosarcoma behaves as a separate entity from osseous osteosarcoma and should be treated as such. The treatment is surgical resection. Five year overall survival is 46% for local and 10% for metastatic disease. Additionally, 45%-50% of patients experience disease recurrence. More >

Ming Liu, Dan Wang, Ning Li

Oncology Research, Vol.23, No.5, pp. 257-266, 2015, DOI:10.3727/096504016X14562725373752

Abstract Osteosarcoma (OS) is the most common malignant primary bone tumor disease. HIF-1α was predicted to be the target gene of microRNA-20b (miR-20b). The present study was designed to illustrate the effect of miR- 20b in regulating osteosarcoma via targeting HIF-1α. In this study, we found that the expression of HIF-1α was significantly increased, while miR-20b obviously decreased in OS patients and OS cell lines compared with healthy controls. Moreover, the luciferase report confirmed the targeting reaction between miR-20b and HIF-1α. Additionally, the overexpression of miR-20b suppressed the invasion and growth of both MG63 and U2OS More >

Rami R. Abou Ghaida, Ragheed M. Saoud, Mohammad Bulbul

Canadian Journal of Urology, Vol.21, No.4, pp. 7393-7395, 2014

Abstract Osteosarcoma is a highly malignant soft tissue tumor. Bladder extra-skeletal osteosarcomas are very rare, and only few cases are reported in the English medical literature. This case is the third one of its kind to be reported consisting of a bladder diverticulum osteosarcoma. Compared to urothelial bladder carcinoma, urinary bladder osteosarcomas have a poorer prognosis. Biopsy and immunochemical staining are critical for the diagnosis. Treatment regimens vary based on the stage of the disease. However, choosing the best option for treatment is still unclear, due to the scarcity of cases available. More >