Int. J. Mol. Sci. 2013, 14(7), 14426-14438; doi:10.3390/ijms140714426
Article

Functional Expression of Thyroid-Stimulating Hormone Receptor on Nano-Sized Bacterial Magnetic Particles in Magnetospirillum magneticum AMB-1

Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
* Author to whom correspondence should be addressed.
Received: 2 April 2013; in revised form: 31 May 2013 / Accepted: 1 July 2013 / Published: 11 July 2013
(This article belongs to the Special Issue Magnetic Nanoparticles 2013)
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Abstract: The measurement of autoantibodies to thyroid-stimulating hormone receptor (TSHR) is important for the diagnosis of autoimmune thyroid disease such as Graves’ disease (GD). Although TSHR from porcine thyroid membrane is commonly used for the measurement of TSHR autoantibodies (TRAb), recombinant human TSHR (hTSHR) remains ideal in terms of stable supply and species identity. Here we set out to express recombinant hTSHR on the lipid-bilayer surface of magnetic nanoparticles from a magnetotactic bacterium, Magnetospirillum magneticum AMB-1. Using a tetracycline-inducible expression system, we successfully overexpressed functional hTSHR on bacterial magnetic particles (BacMPs) in AMB-1 via an anchor protein specific for BacMPs. The overexpressed hTSHR was membrane integrated and possessed both ligand and autoantibody binding activity. Our data suggest that hTSHR-displayed BacMPs have potential as novel tools for ligand-receptor interaction analysis or for TRAb immunoassay in GD patients.
Keywords: thyroid-stimulating hormone receptor; Magnetospirillum magneticum AMB-1; autoantibody; bacterial magnetic particles; tetracycline-inducible expression system

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MDPI and ACS Style

Sugamata, Y.; Uchiyama, R.; Honda, T.; Tanaka, T.; Matsunaga, T.; Yoshino, T. Functional Expression of Thyroid-Stimulating Hormone Receptor on Nano-Sized Bacterial Magnetic Particles in Magnetospirillum magneticum AMB-1. Int. J. Mol. Sci. 2013, 14, 14426-14438.

AMA Style

Sugamata Y, Uchiyama R, Honda T, Tanaka T, Matsunaga T, Yoshino T. Functional Expression of Thyroid-Stimulating Hormone Receptor on Nano-Sized Bacterial Magnetic Particles in Magnetospirillum magneticum AMB-1. International Journal of Molecular Sciences. 2013; 14(7):14426-14438.

Chicago/Turabian Style

Sugamata, Yasuhiro; Uchiyama, Ryo; Honda, Toru; Tanaka, Tsuyoshi; Matsunaga, Tadashi; Yoshino, Tomoko. 2013. "Functional Expression of Thyroid-Stimulating Hormone Receptor on Nano-Sized Bacterial Magnetic Particles in Magnetospirillum magneticum AMB-1." Int. J. Mol. Sci. 14, no. 7: 14426-14438.

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