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已发表论文
利用大鼠脑胶质瘤模型研究声动力学的治疗机制
Authors Song D, Yue W, Li Z, Li J, Zhao J, Zhang N
Published Date September 2014 Volume 2014:7 Pages 1801—1810
DOI http://dx.doi.org/10.2147/OTT.S52426
Received 2 August 2013, Accepted 13 May 2014, Published 30 September 2014
Purpose: The study reported here examined the effect of hematoporphyrin monomethyl ether (HMME)-mediated sonodynamic therapy (SDT) on C6 gliomas implanted in rat brains.
Methods: Two weeks after inoculation, glioma development was evaluated by measuring tumor volume using a 1.5 T magnetic resonance imager. Rats that had a well-developed C6 glioma (usually when the tumor diameter reached 3–5 mm) were used to test SDT, ultrasound-alone, and HMME-alone treatments. Rats both administered and not administered intravenous HMME 10 µg/mL were insonated by a 1 MHz ultrasound at a dose of 0.5 W/cm2.
Results: SDT treatment could effectively inhibit the expansion of intracranial gliomas in vivo. The treatment with ultrasound alone could inhibit glioma growth within 1 week; however, 1 week later, the tumor started growing again. In contrast, the effect of SDT could last at least 2 weeks. Injection of HMME alone had no effects on inhibiting glioma growth, suggesting the sonosensitizer HMME has no antitumor effect. Both SDT and ultrasound-alone treatment could extend the survival of rats implanted with a C6 glioma. Pathological and electron microscopic examinations suggested SDT and ultrasound-alone treatment could induce glioma necrosis by way of triggering glioma-cell apoptosis, which was confirmed by immunohistological examination with cytochrome-c and caspase-3 antibodies. Most importantly, we found that the sonosensitizer HMME could enhance the ultrasound-induced antitumor effect by selectively assisting ultrasound targeting of glioma angiogenesis inhibition.
Conclusion: This study with a rat C6 glioma experimental model showed that SDT can potentially be useful in the treatment of deep-seated malignant gliomas.
Keywords: antitumor mechanism, ultrasound, hematoporphyrin monomethyl ether
Methods: Two weeks after inoculation, glioma development was evaluated by measuring tumor volume using a 1.5 T magnetic resonance imager. Rats that had a well-developed C6 glioma (usually when the tumor diameter reached 3–5 mm) were used to test SDT, ultrasound-alone, and HMME-alone treatments. Rats both administered and not administered intravenous HMME 10 µg/mL were insonated by a 1 MHz ultrasound at a dose of 0.5 W/cm2.
Results: SDT treatment could effectively inhibit the expansion of intracranial gliomas in vivo. The treatment with ultrasound alone could inhibit glioma growth within 1 week; however, 1 week later, the tumor started growing again. In contrast, the effect of SDT could last at least 2 weeks. Injection of HMME alone had no effects on inhibiting glioma growth, suggesting the sonosensitizer HMME has no antitumor effect. Both SDT and ultrasound-alone treatment could extend the survival of rats implanted with a C6 glioma. Pathological and electron microscopic examinations suggested SDT and ultrasound-alone treatment could induce glioma necrosis by way of triggering glioma-cell apoptosis, which was confirmed by immunohistological examination with cytochrome-c and caspase-3 antibodies. Most importantly, we found that the sonosensitizer HMME could enhance the ultrasound-induced antitumor effect by selectively assisting ultrasound targeting of glioma angiogenesis inhibition.
Conclusion: This study with a rat C6 glioma experimental model showed that SDT can potentially be useful in the treatment of deep-seated malignant gliomas.
Keywords: antitumor mechanism, ultrasound, hematoporphyrin monomethyl ether
