Interaction between galectin-3 and FcγRII induces down-regulation of IL-5 gene: Implication of the promoter sequence IL-SREIII

Isabel Cortegano, Victoria Del Pozo, Blanca Cárdaba, Ignacio Arrieta, Soledad Gallardo, Marta Rojo, Esther Aceituno, Toshiyuki Takai, Sjef Verbeek, Pilar Palomino, Fu Tong Liu, Carlos Lahoz

研究成果: Article

38 被引用数 (Scopus)

抄録

Our previous work demonstrated the capacity of galectin-3 (a β-galactoside binding animal lectin) to inhibit IL-5 gene expression in different cell types, but the interaction of lectin with the cells and the pathways for the inhibition process are unknown. One of the purposes of this work was to study the cellular ligand for galectin-3. We have demonstrated that galectin-3 can bind to the low affinity IgG receptor (FcγRII or CD32) by using different experimental approaches, such as flow cytometry, fusion protein GST technology, and with a model of FcγRII-deficient mice. To further analyze the interaction between FcγRII and galectin-3, and its implication in IL-5 gene down-regulation we used FcγRII-deficient mice. When PBMC from these mice were incubated with galectin-3, the expression of the IL-5 gene was unchanged. However, when PBMC from wild type mice and FcγRIII-deficient mice were incubated with galectin-3, IL-5 gene expression was down-regulated. Finally, we studied the implication of the negative regulatory sequence in the IL-5 gene promoter. In the presence of galectin-3, a DNA-protein complex was formed with the IL-5REIII region. This complex was not observed when unrelated oligonucleotide was used. So, galectin-3 induces a pathway, which activates a transcription factor that binds to IL-5REIII. This interaction is capable of inhibiting IL-5 gene transcription.

本文言語English
ページ(範囲)237-242
ページ数6
ジャーナルGlycobiology
10
3
DOI
出版ステータスPublished - 2000 3

ASJC Scopus subject areas

  • Biochemistry

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