Abstract
We generated and characterized transgenic mice carrying a 102 kb bovine genomic fragment, encoding the neonatal Fc receptor α-chain (bFcRn). FcRn plays a crucial role in the maternal IgG transport and it also regulates the IgG and albumin homeostasis. Some of its functions and transcriptional regulation show species specific differences. The FcRn heterodimer is composed of the α-chain and beta-2-microglobulin (β2 m). A bacterial artificial chromosome containing the bovine FcRn α-chain gene (bFCGRT) with its 44 kb 5′ and 50 kb long 3′ flanking sequences was microinjected into fertilized mouse oocytes. Two of the transgenic lines generated, showed copy number related and integration site independent bFcRn expression. The bFcRn α-chain forms a functional receptor with the mouse β2-microglobulin and extends the half-life of the mouse IgG in transgenic mice. Our results underline the feasibility of creating BAC transgenic mouse models of economically important bovine genes.
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Abbreviations
- FcRn:
-
neonatal Fc receptor
- FCGRT:
-
gene of the FcRn α-chain
- β2 m:
-
beta-2-microglobulin
- IgG:
-
immunoglobulin G
- BAC:
-
bacterial artificial chromosome
- wt:
-
wild type
- tg:
-
transgenic
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Acknowledgements
This work was supported by the Grants OTKA T049015, OMFB 1605-1606/2002, the Swedish Research Council and by ESF-COST B20 STSMs to Zs.B. and L.B. WinNonlin software was generously provided through an Academic License by Pharsight Corporation.
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Bender, B., Bodrogi, L., Mayer, B. et al. Position independent and copy-number-related expression of the bovine neonatal Fc receptor α-chain in transgenic mice carrying a 102 kb BAC genomic fragment. Transgenic Res 16, 613–627 (2007). https://doi.org/10.1007/s11248-007-9108-9
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DOI: https://doi.org/10.1007/s11248-007-9108-9