A Rat Model of Frozen Shoulder Demonstrating the Effect of Transcatheter Arterial Embolization on Angiography,Histopathology, and Physical Activity |
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| Authors: | Hidehiko Taguchi Toshihiro Tanaka Hideyuki Nishiofuku Yasushi Fukuoka Kiyoyuki Minamiguchi Ryosuke Taiji Katsutoshi Takayama Maiko Takeda Kinta Hatakeyama Takashi Inoue Chiho Ohbayashi Kimihiko Kichikawa |
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| Institution: | 1. Department of Radiology, IVR center, Nara Medical University, Kashihara, Japan;2. Diagnostic Pathology, Nara Medical University, Kashihara, Japan;3. Clinical Research Center, Nara Medical University, Kashihara, Japan;4. Department of Interventional Neuroradiology and Radiology, Koseikai Takai Hospital, Tenri, Japan;5. Department of Pathology, National Cerebral and Cardiovascular Center, Suita, Japan |
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| Abstract: | PurposeTo assess the angiographic findings and the effects of transcatheter arterial embolization on physical activity and histopathology using a frozen shoulder rat model.Materials and MethodsFirst, the angiographic and histopathologic findings of rats in which the shoulder was immobilized with molding plaster for 6 weeks (n = 4) were compared to control rats with normal non-immobilized shoulders (n = 4). Next, a total of 16 frozen shoulder rats were divided into 2 groups. In the transcatheter arterial embolization group (n = 8), imipenem/cilastatin was injected into the left thoracoacromial artery. The changes of physical activity before and after procedures were evaluated and compared with a saline-injected control group (n = 8). Histopathologic findings were also compared between the 2 groups.ResultsAngiography revealed abnormal shoulder staining in all of the rats with a frozen shoulder. On histopathology, the numbers of microvessels and mononuclear inflammatory cells in the synovial membrane of the joint capsule were significantly higher compared with the control rats (both P = .03). In the transcatheter arterial embolization group, the running distance and speed were improved (P = .03 and P = .01, respectively), whereas there were no significant differences in the control group. The number of microvessels and mononuclear inflammatory cells in the transcatheter arterial embolization group were significantly lower than the control group (P = .002 and P = .001, respectively).ConclusionsThe rat frozen shoulder model revealed the development of neovascularization. Transcatheter arterial embolization decreased the number of blood vessels and inflammatory changes in the frozen shoulder and increased the moving distance and speed of the rats. |
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| Keywords: | IPM/CS"} {"#name":"keyword" "$":{"id":"kwrd0015"} "$$":[{"#name":"text" "_":"imipenem/cilastatin MIC"} {"#name":"keyword" "$":{"id":"kwrd0025"} "$$":[{"#name":"text" "_":"mononuclear inflammatory cells MV"} {"#name":"keyword" "$":{"id":"kwrd0035"} "$$":[{"#name":"text" "_":"microvessels |
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