Heat shock protein 2 promoter drives Cre expression in spermatocytes of transgenic mice.

Heat shock protein 2 promoter drives Cre expression in spermatocytes of transgenic mice.
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DOI:
10.1002/dvg.20588
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发表时间:
2010-02
期刊:
影响因子:
1.5
通讯作者:
Eddy, Edward M.
Eddy, Edward M.
中科院分区:
生物学4区
文献类型:
--
作者:
Inselman, Amy L.;Nakamura, Noriko;Brown, Paula R.;Willis, William D.;Goulding, Eugenia H.;Eddy, Edward M.

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我们建立了转基因小鼠品系C57 BL/6-Tg(Hspa 2-cre)1 Eddy/J(Hspa 2-cre),其在热休克蛋白2(Hspa 2)基因启动子的907-bp片段的控制下表达cre重组酶。使用Gt(ROSA)26 Sortm 1 Sor/J(ROSA 26)和Tg(CAG-Bgeo/GFP)21 Lbe/J(Z/EG)报告菌株以及RT-PCR和免疫组织化学测定来确定转基因表达。Hspa 2-cre表达模仿睾丸内内源性HSPA 2的生精细胞特异性表达,首先在细线期/偶线期精母细胞中观察到。转基因的表达也被检测到在大脑中的限制性位点,发生内源性HSPA 2。虽然交配的Hspa 2-cre小鼠与一个floxed Cdc 2a等位基因的小鼠的结果表明,在胚胎发生过程中发生的转基因的一些表达,Hspa 2-cre小鼠提供了一个有价值的新工具,用于评估粗线期精母细胞减数分裂前期期间和之后的基因的作用。
We generated transgenic mouse line C57BL/6-Tg(Hspa2-cre)1Eddy/J (Hspa2-cre), which expresses cre-recombinase under the control of a 907-bp fragment of the heat shock protein 2 (Hspa2) gene promoter. Transgene expression was determined using Gt(ROSA)26Sortm1Sor/J (ROSA26) and Tg(CAG-Bgeo/GFP)21Lbe/J (Z/EG) reporter strains and RT-PCR and immunohistochemistry assays. Hspa2-cre expression mimicked the spermatogenic cell-specific expression of endogenous HSPA2 within the testis, being first observed in leptotene/zygotene spermatocytes. Expression of the transgene also was detected at restricted sites in the brain, as occurs for endogenous HSPA2. Although the results of mating the Hspa2-cre mice to mice with a floxed Cdc2a allele indicated that some expression of the transgene occurs during embryogenesis, the Hspa2-cre mice provide a valuable new tool for assessing the roles of genes during and after meiotic prophase in pachytene spermatocytes.
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