Stem cell factor is localized in, released from, and cleaved by human mast cells

Amato De Paulis, Giuseppina Minopoli, Eloisa Arbustini, Gennaro De Crescenzo, Fabrizio Dal Piaz, Piero Pucci, Tommaso Russo, Gianni Marone

Research output: Contribution to journalArticle

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Abstract

Stem cell factor (SCF) is the most important cytokine regulating human mast cell growth and functions. The immunogold technique showed SCF in the secretory granules of skin mast cells and in lung parenchymal mast cells (HLMC). Immunoreactive SCF (iSCF) was detected in cell lysates of HLMC, but not in basophils; iSCF and histamine were detected in supernatants of HLMC 3 min after challenge with anti-FcεRI or anti-IgE, and iSCF in supernatants rapidly declined after 30 min, whereas histamine remained unchanged for 120 min. HPLC and electrospray mass spectrometry (ES/MS) analysis of recombinant human SCF1-166 (18,656.9 ± 0.9 Da) treated with chymase showed a polypeptide of 17,977.1 ± 0.6 Da and a minor component of 697.4 ± 0.1 Da generated by specific cleavage at Phe159. SCF1-166 and SCF1-159 similarly activated HLMC, potentiated anti-IgE-induced activation of these cells, and stimulated HLMC chemotaxis. SCF159-166 had no effect on mast cells. Western blot analysis of supernatants of anti-IgE-activated HLMC incubated with recombinant human SCF1-166 showed that SCF1-166 was rapidly cleaved to SCF1-159 and SCF1-144. Experiments with supernatants of anti-IgE-activated HLMC incubated with SCF1-166 yielded similar results. In conclusion, SCF is stored in mast cell secretory granules and is immunologically released by human mast cells. SCF1-166 is rapidly and specifically cleaved to SCF1-159 by chymase, which retains its biological effect on mast cells. SCF is also cleaved by other proteases to several SCF species whose possible biological activities remain to be established.

Original languageEnglish
Pages (from-to)2799-2808
Number of pages10
JournalJournal of Immunology
Volume163
Issue number5
Publication statusPublished - Sep 1 1999

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Stem Cell Factor
Mast Cells
Chymases
Secretory Vesicles
Histamine
Basophils
Chemotaxis
Mass Spectrometry
Peptide Hydrolases
Western Blotting
Immunohistochemistry
High Pressure Liquid Chromatography
Cytokines
Lung
Skin
Peptides
anti-IgE antibodies
Growth

ASJC Scopus subject areas

  • Immunology

Cite this

De Paulis, A., Minopoli, G., Arbustini, E., De Crescenzo, G., Dal Piaz, F., Pucci, P., ... Marone, G. (1999). Stem cell factor is localized in, released from, and cleaved by human mast cells. Journal of Immunology, 163(5), 2799-2808.

Stem cell factor is localized in, released from, and cleaved by human mast cells. / De Paulis, Amato; Minopoli, Giuseppina; Arbustini, Eloisa; De Crescenzo, Gennaro; Dal Piaz, Fabrizio; Pucci, Piero; Russo, Tommaso; Marone, Gianni.

In: Journal of Immunology, Vol. 163, No. 5, 01.09.1999, p. 2799-2808.

Research output: Contribution to journalArticle

De Paulis, A, Minopoli, G, Arbustini, E, De Crescenzo, G, Dal Piaz, F, Pucci, P, Russo, T & Marone, G 1999, 'Stem cell factor is localized in, released from, and cleaved by human mast cells', Journal of Immunology, vol. 163, no. 5, pp. 2799-2808.
De Paulis A, Minopoli G, Arbustini E, De Crescenzo G, Dal Piaz F, Pucci P et al. Stem cell factor is localized in, released from, and cleaved by human mast cells. Journal of Immunology. 1999 Sep 1;163(5):2799-2808.
De Paulis, Amato ; Minopoli, Giuseppina ; Arbustini, Eloisa ; De Crescenzo, Gennaro ; Dal Piaz, Fabrizio ; Pucci, Piero ; Russo, Tommaso ; Marone, Gianni. / Stem cell factor is localized in, released from, and cleaved by human mast cells. In: Journal of Immunology. 1999 ; Vol. 163, No. 5. pp. 2799-2808.
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abstract = "Stem cell factor (SCF) is the most important cytokine regulating human mast cell growth and functions. The immunogold technique showed SCF in the secretory granules of skin mast cells and in lung parenchymal mast cells (HLMC). Immunoreactive SCF (iSCF) was detected in cell lysates of HLMC, but not in basophils; iSCF and histamine were detected in supernatants of HLMC 3 min after challenge with anti-FcεRI or anti-IgE, and iSCF in supernatants rapidly declined after 30 min, whereas histamine remained unchanged for 120 min. HPLC and electrospray mass spectrometry (ES/MS) analysis of recombinant human SCF1-166 (18,656.9 ± 0.9 Da) treated with chymase showed a polypeptide of 17,977.1 ± 0.6 Da and a minor component of 697.4 ± 0.1 Da generated by specific cleavage at Phe159. SCF1-166 and SCF1-159 similarly activated HLMC, potentiated anti-IgE-induced activation of these cells, and stimulated HLMC chemotaxis. SCF159-166 had no effect on mast cells. Western blot analysis of supernatants of anti-IgE-activated HLMC incubated with recombinant human SCF1-166 showed that SCF1-166 was rapidly cleaved to SCF1-159 and SCF1-144. Experiments with supernatants of anti-IgE-activated HLMC incubated with SCF1-166 yielded similar results. In conclusion, SCF is stored in mast cell secretory granules and is immunologically released by human mast cells. SCF1-166 is rapidly and specifically cleaved to SCF1-159 by chymase, which retains its biological effect on mast cells. SCF is also cleaved by other proteases to several SCF species whose possible biological activities remain to be established.",
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AU - De Crescenzo, Gennaro

AU - Dal Piaz, Fabrizio

AU - Pucci, Piero

AU - Russo, Tommaso

AU - Marone, Gianni

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