Abstract
Interleukin 1 (IL-1) is a cytokine that mediates a variety of immunological responses. We report here the isolation of a porcine IL-1β cDNA from an alveolar macrophage library. The complete cDNA sequence is 1458 bp in length and has an open reading frame of 803 bp, encoding a 267-amino-acid (aa) protein with an approximate molecular size of 31 kDa. The porcine IL-1β cDNA sequence shows homologies of 82.0, 81.0, 74.0, and 74.0% with the bovine, sheep, human, and murine sequences in the protein coding regions, respectively. Northern blot analysis reveals a single 1.7-kb mRNA species that is differentially regulated by lipopolysaccharide, phorbol myristate acetate, and tumor necrosis factor but is not regulated by human recombinant IL-1. Porcine IL-1β is down-regulated by dexamethasone, polymyxin B, and IL-4 in a fashion kinetically similar to the other reported species.
Original language | English (US) |
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Pages (from-to) | 285-289 |
Number of pages | 5 |
Journal | Gene |
Volume | 129 |
Issue number | 2 |
DOIs | |
State | Published - Jul 30 1993 |
Keywords
- IL-Iβ
- PCR
- Recombinant DNA
- comparison
- cytokine
- nucleotide sequence