Expression of the β4 integrin subunit induces monocytic differentiation of 32D/v-Abl cells

Annarita Morena, Sabrina Riccioni, Alessandra Marchetti, Alessandro Tartaglia Polcini, Arthur M. Mercurio, Giovanni Blandino, Ada Sacchi, Rita Falcioni

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The α6β4 integrin is the receptor for various laminin isoforms and is a component of the hemidesmosome. Increased expression levels of this integrin correlate with the aggressive phenotype of many epithelial tumors compared with surrounding normal tissue. Furthermore, the long cytoplasmic tail of the β4 integrin subunit has been implicated in several signal transduction pathways that are involved not only in invasion, but also in proliferation and apoptosis. Here we report that the exogenous expression of β4 integrin in 32D/v-abl-transformed cells reduces tumor aggressiveness in vivo and strongly inhibits cell proliferation in vitro by inducing monocytic differentiation. These effects are accompanied by growth arrest and p73 protein accumulation. The hypothesis that the inhibition of v-Abl oncogenic capacity could allow the activation of the endogenous c-Abl was tested in RKO cells. The results clearly demonstrated a strong increase of c-Abl phosphorylation that is accompanied by its association with p73 protein. Overall, the reported findings indicate that α6β4 integrin promotes growth arrest and differentiation by modulating Abl kinases and p73 protein pathway(s).

Original languageEnglish
Pages (from-to)96-106
Number of pages11
JournalBlood
Volume100
Issue number1
DOIs
Publication statusPublished - Jul 1 2002

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Integrins
Tumors
Hemidesmosomes
Laminin Receptors
Signal transduction
Phosphorylation
Proteins
Cell proliferation
Growth
Signal Transduction
Neoplasms
Protein Isoforms
Phosphotransferases
Chemical activation
Cell Proliferation
Association reactions
Tissue
Apoptosis
Phenotype
Tumor Protein p73

ASJC Scopus subject areas

  • Hematology

Cite this

Expression of the β4 integrin subunit induces monocytic differentiation of 32D/v-Abl cells. / Morena, Annarita; Riccioni, Sabrina; Marchetti, Alessandra; Polcini, Alessandro Tartaglia; Mercurio, Arthur M.; Blandino, Giovanni; Sacchi, Ada; Falcioni, Rita.

In: Blood, Vol. 100, No. 1, 01.07.2002, p. 96-106.

Research output: Contribution to journalArticle

Morena, A, Riccioni, S, Marchetti, A, Polcini, AT, Mercurio, AM, Blandino, G, Sacchi, A & Falcioni, R 2002, 'Expression of the β4 integrin subunit induces monocytic differentiation of 32D/v-Abl cells', Blood, vol. 100, no. 1, pp. 96-106. https://doi.org/10.1182/blood.V100.1.96
Morena, Annarita ; Riccioni, Sabrina ; Marchetti, Alessandra ; Polcini, Alessandro Tartaglia ; Mercurio, Arthur M. ; Blandino, Giovanni ; Sacchi, Ada ; Falcioni, Rita. / Expression of the β4 integrin subunit induces monocytic differentiation of 32D/v-Abl cells. In: Blood. 2002 ; Vol. 100, No. 1. pp. 96-106.
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AU - Blandino, Giovanni

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