Department of Surgery and The Alvin J. Siteman Cancer Center and Division of Comparative Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.
Cancer Prev Res (Phila). 2009 Dec;2(12):1059-64. doi: 10.1158/1940-6207.CAPR-09-0221. Epub 2009 Nov 24.
In the present study, we examined the effect of bexarotene (Targretin) and budesonide in the chemoprevention of small cell lung carcinoma using a lung-specific knockout model of Rb1 and p53. Upon treatment with bexarotene, tumor incidence, number, and load were significantly reduced (P < 0.05). Budesonide treatment trended to inhibition, but the effect was not statistically significant (P > 0.05). Immunohistochemical staining indicated that bexarotene treatment decreased cell proliferation and increased apoptosis in tumors. The Rb1/p53 gene-targeted mouse seems to be a valuable model for chemopreventive studies on human small cell lung cancer. Our results indicate that the retinoid X receptor agonist bexarotene may be a potent chemopreventive agent in this cancer type.
在本研究中,我们使用 Rb1 和 p53 肺特异性敲除模型,研究了贝沙罗汀(Targretin)和布地奈德在小细胞肺癌化学预防中的作用。贝沙罗汀治疗可显著降低肿瘤发生率、数量和负荷(P<0.05)。布地奈德治疗呈抑制趋势,但无统计学意义(P>0.05)。免疫组化染色表明,贝沙罗汀治疗可减少肿瘤细胞增殖并增加细胞凋亡。Rb1/p53 基因靶向小鼠似乎是人类小细胞肺癌化学预防研究的有价值模型。我们的结果表明,视黄醇 X 受体激动剂贝沙罗汀可能是这种癌症类型的有效化学预防剂。