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Expression of pancreatic and duodenal homeobox1 (PDX1) protein in the interior and exterior regions of the intestine, revealed by development and analysis of Pdx1 knockout mice

Laboratory Animal Research volume 31, pages 93–98 (2015)Cite this article

Abstract

We developed pancreatic and duodenal homeobox1 (Pdx1) knockout mice to improve a compensatory hyperinsulinemia, which was induced by hyperplasia in the β cells or Langerhans’ islands, as the diabetic model mice. For targeting of Pdx1 gene by homologous recombination, ES cells derived from a 129+Ter/SvJcl×C57BL/6JJcl hybrid mouse were electroporated and subjected to positive-negative selection with hygromycin B and ganciclovir. As these results, one of the three chimeric mice succeeded to produce the next or F1 generation. Then, the mouse fetuses were extracted from the mother’s uterus and analyzed immunohistologically for the existence of a pancreas. The fetuses were analyzed at embryonic day 14.5 (E14.5) because Pdx1 knockout could not alive after birth in this study. Immunohistochemical staining revealed that 10 fetuses out of 26 did not have any PDX1 positive primordium of the pancreas and that the PDX1 expresses in both the interior and exterior regions of intestine. In particular, one the exterior of the intestine PDX1 was expressed in glands that would be expected to form the pancreas. The result of PCR genotyping with extracted DNA from the paraffin sections showed existence of 10 Pdx1-knockout mice and corresponded to results of immunostaining. Thus, we succeeded to establish a Pdx1-knockout (Pdx1−/−) mice.

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Acknowledgments

We thank Masafumi Yamamoto, Central Institute for Experimental Animals, for assistance with PCR genotyping. This study was supported by a Grant-in-Aid for Challenging Exploratory Research (No. 15K14374) to Haruo Hashimoto from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

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Authors and Affiliations

  1. Department of Laboratory Animal Research, Central Institute for Experimental Animals, 3-25-12. Kawasaki-ku, Kawasaki-shi, Kanagawa, 216-0001, Japan

    Haruo Hashimoto, Tsutomu Kamisako, Takahiro Kagawa, Mika Yagoto, Ri-ichi Takahashi, Kenji Kawai & Hiroshi Suemizu

  2. National Agriculture and Food Research Organization, Institute of Livestock and Grassland Science, Tsukuba, Japan

    Seiki Haraguchi

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  1. Haruo Hashimoto
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  2. Tsutomu Kamisako
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  3. Takahiro Kagawa
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Correspondence to Haruo Hashimoto.

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Hashimoto, H., Kamisako, T., Kagawa, T. et al. Expression of pancreatic and duodenal homeobox1 (PDX1) protein in the interior and exterior regions of the intestine, revealed by development and analysis of Pdx1 knockout mice. Lab Anim Res 31, 93–98 (2015). https://doi.org/10.5625/lar.2015.31.2.93

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  • DOI: https://doi.org/10.5625/lar.2015.31.2.93

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Laboratory Animal Research

ISSN: 2233-7660