Effect of YM529 on a Model of Mandibular Invasion by Oral Squamous Cell Carcinoma in Mice
Autor: | Masato Okamoto, Takeshi Nomura, Sadamitsu Hashimoto, Keiko Yokoo, Hiroyasu Noma, Mitsunobu Sato, Ryo Takagi, Chuan-bin Guo, Takahiko Shibahala, Nian-hui Cui, Guangyan Yu |
---|---|
Rok vydání: | 2005 |
Předmět: |
Male
Cancer Research Pathology medicine.medical_treatment Gene Expression Osteoclasts Receptors Cytoplasmic and Nuclear Mandible Receptors Tumor Necrosis Factor Mice Receptor Mice Inbred C3H Membrane Glycoproteins Diphosphonates Receptor Activator of Nuclear Factor-kappa B biology Reverse Transcriptase Polymerase Chain Reaction Imidazoles Oncology RANKL Carcinoma Squamous Cell Mouth Neoplasms Tumor necrosis factor alpha medicine.medical_specialty Imaging Three-Dimensional Osteoprotegerin Cell Line Tumor Internal medicine medicine Carcinoma Animals Neoplasm Invasiveness RNA Messenger Bone Resorption Glycoproteins Interleukin-6 Tumor Necrosis Factor-alpha business.industry Body Weight RANK Ligand Parathyroid Hormone-Related Protein Acid phosphatase Bisphosphonate medicine.disease Disease Models Animal Endocrinology biology.protein Carrier Proteins Tomography X-Ray Computed business |
Zdroj: | Clinical Cancer Research. 11:2713-2719 |
ISSN: | 1557-3265 1078-0432 |
Popis: | Purpose: This study examined the mechanisms of osteoclast-mediated bone invasion in a model of oral squamous cell carcinoma (OSCC). C3H/HeN mice were inoculated with SCC VII cells into the masseter region to establish an animal model of mandibular invasion by OSCC. Experimental Design: The mice were divided into three groups: a control group, given daily s.c. injections of saline; group 1, given 2 μg per mouse per day of the bisphosphonate YM529; and group 2, given 10 μg per mouse per day of YM529. After 3 weeks of treatment, the lesions were studied by micro-computed tomography. After tartrate-resistant acid phosphatase (TRAP) staining, the osteoclasts were easily identified, and the percentages of the area occupied by osteoclasts were calculated by computer for each sample. The tumors were analyzed by RT-PCR to determine the mRNA expression of interleukin-6 (IL-6), parathyroid hormone–related protein (PTHrP), tumor necrosis factor-α (TNF-α), receptor activator of nuclear factor-κB (RANK), RANK ligand (RANKL), and osteoprotegerin. Results: SCC VII cells rapidly multiplied in the masseter muscle of the mice. Bone invasion was evident only in the control group on micro-computed tomography. On TRAP-stained slices, the percentages of osteoclasts in groups 1 and 2 were significantly lower than that in the control group. The mRNA expressions of IL-6, PTHrP, THF-α, and RANK decreased as the concentration of YM529 increased. Conclusions: We conclude that various cancer-derived cytokines play important roles in the invasion of bone by OSCC. YM529, a third-generation bisphosphonate, can suppress osteoclast-mediated bone invasion by OSCC. The mechanism of this effect might involve inhibition of cytokines such as IL-6, PTHrP, TNF-α, and RANK by YM529. |
Databáze: | OpenAIRE |
Externí odkaz: |