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Int. J. Mol. Sci. 2016, 17(10), 1670; doi:10.3390/ijms17101670

Identification, Molecular Cloning of IL-1β and Its Expression Profile during Nocardia seriolae Infection in Largemouth Bass, Micropterus salmoides

1
Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 912, Taiwan
2
Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu 300, Taiwan
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Academic Editor: Li Lin
Received: 13 July 2016 / Revised: 26 September 2016 / Accepted: 28 September 2016 / Published: 1 October 2016
(This article belongs to the Section Biochemistry, Molecular and Cellular Biology)
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Abstract

In the present study, IL-1β cDNA was identified and analyzed from largemouth bass (Micropterus salmoides). Full length IL-1β mRNA was obtained using Rapid Amplification of cDNA Ends (RACE), which contains 78 bp 3′-UTR, a 455 bp 5′-UTR, and an open reading frame (ORF) of 702 bp coding for 233 amino acid residues. The molecular weight and theoretical isoelectric point of largemouth bass IL-1β protein was predicted to be 26.7 kDa and 6.08 respectively. A largemouth bass IL-1β phylogenetic analysis showed a close relation to the IL-1βs of striped trumpeter (Latris lineata), Chinese perch (Siniperca chuatsi), and Japanese sea bass (Lateolabrax japonicus). Peptidoglycan upregulated IL-1β in the spleen and head kidney, while lipopolysaccharide upregulated detectable levels of IL-1β in the spleen only. Largemouth bass, challenged with Nocardia seriolae (1.0 × 106 cfu/mL), showed a significant increase in IL-1β at 3 and 5 days post infection (dpi) in the spleen, while in the head kidney significant expression was found at 2 and 3 dpi, peaking at 3 dpi. Furthermore, tumor necrosis factor α (TNF-α) showed significantly higher expression in the spleen at 3 and 5 dpi, and in the head kidney at 1 and 3 dpi, with expression decreasing at 5 dpi in both tissues. View Full-Text
Keywords: IL-1β; largemouth bass (Micropterus salmoides); Nocardia seriolae; immunoadjuvant IL-1β; largemouth bass (Micropterus salmoides); Nocardia seriolae; immunoadjuvant
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ho, P.-Y.; Byadgi, O.; Wang, P.-C.; Tsai, M.-A.; Liaw, L.-L.; Chen, S.-C. Identification, Molecular Cloning of IL-1β and Its Expression Profile during Nocardia seriolae Infection in Largemouth Bass, Micropterus salmoides. Int. J. Mol. Sci. 2016, 17, 1670.

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