Distinct actions of interleukin-9 and interleukin-4 on a hematopoietic stem cell line, EMLC1

Xin Yuan Wang, Vasily Gelfanov, Hui (Herb) Sun, Schickwann Tsai, Yu Chung Yang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

EMLC1 is a hematopoietic stem cell line that depends on stem cell factor (SCF) for growth and generates lymphoid, erythroid and myeloid progenitors in the presence of different cytokines. We have studied signaling events leading to cell proliferation and differentiation of EMLC1 mediated by interleukin (IL)-4 and IL-9. It was found that IL-9 enhances SCF-induced cell proliferation and promotes erythropoietin (EPO)-dependent erythroid differentiation of EMLC1 cells. However, IL-9 alone cannot support the growth of this cell line. In contrast, IL-4 by itself is sufficient to promote the growth of EMLC1 cells, even in the absence of SCF. Antiphosphotyrosine immunoblots of total cell lysates demonstrated that IL-4 and IL-9 induce tyrosine phosphorylation of different cellular substrates. Both IL-4 and IL- 9 stimulated tyrosine phosphorylation of SHP-2, whereas the 90-kD tyrosine phosphorylated protein induced by IL-9 stimulation is Stat3. We have also shown that IL-4 is much more potent than IL-9 in inducing the expression of primary response gene c-myc. It was further determined that c-myc antisense oligodeoxynucleotide blocked IL-4 supported cell growth. Taken together, these results indicate that IL-4 may serve as a growth-promoting factor for hematopoietic stem cells, and IL-9 enhances both growth and erythroid differentiation of primitive hematopoietic progenitors. The results also suggest that differences in tyrosine phosphorylation induced by IL-4 and IL- 9 may in part determine their distinct biological functions.

Original languageEnglish (US)
Pages (from-to)139-146
Number of pages8
JournalExperimental Hematology
Volume27
Issue number1
DOIs
StatePublished - Jan 1999
Externally publishedYes

Fingerprint

Interleukin-9
Hematopoietic Stem Cells
Interleukin-4
Cell Line
Stem Cell Factor
Tyrosine
Growth
Phosphorylation
Cell Differentiation
Cell Proliferation
myc Genes
Oligodeoxyribonucleotides
Erythropoietin
Intercellular Signaling Peptides and Proteins
Cytokines

Keywords

  • IL-4
  • IL-9
  • Stem cell

ASJC Scopus subject areas

  • Cancer Research
  • Cell Biology
  • Genetics
  • Hematology
  • Oncology
  • Transplantation

Cite this

Distinct actions of interleukin-9 and interleukin-4 on a hematopoietic stem cell line, EMLC1. / Wang, Xin Yuan; Gelfanov, Vasily; Sun, Hui (Herb); Tsai, Schickwann; Yang, Yu Chung.

In: Experimental Hematology, Vol. 27, No. 1, 01.1999, p. 139-146.

Research output: Contribution to journalArticle

Wang, Xin Yuan ; Gelfanov, Vasily ; Sun, Hui (Herb) ; Tsai, Schickwann ; Yang, Yu Chung. / Distinct actions of interleukin-9 and interleukin-4 on a hematopoietic stem cell line, EMLC1. In: Experimental Hematology. 1999 ; Vol. 27, No. 1. pp. 139-146.
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