A mouse model of bone cancer pain signs constructed by Lewis lung carcinoma cells inoculation of the femur / 中国医师杂志

ABSTRACT

Objective To evaluate the behavior and bone destruction of the mouse model of bone cancer pain signs. Method A mouse model of bone cancer pain signs was developed by intra-femur inoculations of Lewis lung carcinoma cells in C57BL/6 mice. Spontane-ous lifting time, ambulatory score and paw withdrawal latencies to radiant heat stimulation were measured in alternative days throughout the experiment. The structural damage of the femur were monitored by radiogram on the 7th, 15th and 23rd day respectively, and the pathohisto-logical changes of the femur bones were observed by hematoxylin-eosin staining (HE) staining on the same days. Meanwhile, the glial fibril-lary acid protein (GFAP) immunohistochemistry changes of the spinal cord in lumbar segments on the 23rd day after inoculation were ob-served. Results Mice received intra-femur inoculation of Lewis lung carcinoma cells gradually developed spontaneous pain, which was be-ginning on the 11th day after inoculation, followed by move-evoked pain and thermal allodynia. On the 23rd day after inoculation, X-ray film showed that medullary cavity of ipsilateral distal femur were filled with tumor cells and full thickness cortical bone was lost. Furthermore, tumor cells invaded peripheral muscles. Astrocytes on the inoculated side of the spinal cord were activated. Conclusion Lewis lung carci-noma cells were a good choice to build a mouse bone cancer pain.