A Novel Controlled PTEN-Knockout Mouse Model for Prostate Cancer Study.

A Novel Controlled PTEN-Knockout Mouse Model for Prostate Cancer Study.
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DOI:
10.3389/fmolb.2021.696537
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发表时间:
2021
影响因子:
5
通讯作者:
Zhang Q
Zhang Q
中科院分区:
生物学3区
文献类型:
--
作者:
Liu S;Zhang B;Rowan BG;Jazwinski SM;Abdel-Mageed AB;Steele C;Wang AR;Sartor O;Niu T;Zhang Q

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前列腺癌(PCa)与高龄有关,但年龄如何导致前列腺癌的发生仍不清楚。前列腺特异性 Pten 条件敲除小鼠模型密切模仿人类 PCa 的起始和进展。为了更好地了解年龄如何影响实验模型中的 PCa,我们在不同年龄(老年与非老年)的成年小鼠中生成了空间和时间受控的 Pten-null PCa 小鼠模型。在这里,我们提出了一种方案,将带有荧光素标签的表达 Cre 的腺病毒经导管内注射到 Pten-floxed 小鼠的前列腺前叶中; Pten丢失会在不同年龄的Cre表达后被触发。病毒感染后荧光素信号的体内成像证实了病毒的成功传递和 Cre 活性。免疫组织化学染色证实了 Cre 重组酶的前列腺上皮特异性表达以及 Pten 的丢失以及 P-Akt、P-S6 和 P-4E-BP1 的激活。 Cre 表达、Pten 消融和激活的 PI3K/AKT/mTOR 通路仅限于前列腺上皮。所有小鼠在 Pten 消融后 4 周内出现前列腺上皮增生,在 Pten 消融后 8 周内出现前列腺上皮内瘤变 (PIN)。 Pten 消融后 8-16 周,一些 PIN 已发展为侵袭性腺癌。与年轻小鼠相比,老年小鼠表现出 PI3K/AKT/mTOR 信号传导显着加速,PCa 发病和进展增加。病毒感染成功率~80%。该模型将有利于研究与衰老相关的癌症。
Prostate cancer (PCa) is associated with advanced age, but how age contributes to prostate carcinogenesis remains unknown. The prostate-specific Pten conditional knockout mouse model closely imitates human PCa initiation and progression. To better understand how age impacts PCa in an experimental model, we have generated a spatially and temporally controlled Pten-null PCa murine model at different ages (aged vs. non-aged) of adult mice. Here, we present a protocol to inject the Cre-expressing adenovirus with luciferin tag, intraductally, into the prostate anterior lobes of Pten-floxed mice; Pten-loss will be triggered post-Cre expression at different ages. In vivo imaging of luciferin signal following viral infection confirmed successful delivery of the virus and Cre activity. Immunohistochemical staining confirmed prostate epithelial-specific expression of Cre recombinase and the loss of Pten and activation of P-Akt, P-S6, and P-4E-BP1. The Cre-expression, Pten ablation, and activated PI3K/AKT/mTOR pathways were limited to the prostate epithelium. All mice developed prostatic epithelial hyperplasia within 4 weeks after Pten ablation and prostatic intraepithelial neoplasia (PIN) within 8 weeks post-Pten ablation. Some PINs had progressed to invasive adenocarcinoma at 8–16 weeks post-Pten ablation. Aged mice exhibited significantly accelerated PI3K/AKT/mTOR signaling and increased PCa onset and progression compared to young mice. The viral infection success rate is ∼80%. This model will be beneficial for investigations of cancer-related to aging.
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发表时间: 2008
期刊: PloS one
影响因子: 3.7
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发表时间: 2015-04-15
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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