Abstract
The suspension pro granulocyte/macrophage (SPGM1) cell line was established from a transplantable mouse progranulocytic/promacrophage tumor. Surprisingly, SPGM1 cells expressed a typical CD5 pre-B cell phenotype, being positive for Ly-1 (CD5), PB76, B220 (CD45RA), and the pre-B Ig receptor complex (μH chains, λ5 and vpre-B surrogate L chains, and the IgMα (mb-1) and Igβ (B29) co-receptor molecules). Southern Blot analysis revealed clonal rearrangement of the μH chain locus and germ-line L chain loci. SPGM1 formed blast cell-, macrophage-, and occasional granulocytic colonies in soft agar in the presence of murine IL-3. IL-3 also induced macrophage differentiation of SPGM1 cells in suspension cultures. The earliest changes were detectable at 24 h by Northern blot analysis. IL-3-treatment increased Mac1 mRNA, induced c-fms mRNA, and down-regulated mRNA for μ, λ5, vpre-B and mb-1. After 2 to 4 days the cells were larger, strongly adherent, expressed the macrophage markers Mac1 and F4/80, had lost μH chain and PB76 surface expression, and readily phagocytosed latex beads. Thus SPGM1 has all the characteristic features of a CD5+ pre-B cell line. However, IL-3 predominantly induced SPGM1 to switch its differentiation program from a pre-B cell to a macrophage. This inducible, rapid switch of virtually the entire population provides a unique model for the molecular analysis of mechanisms involved in cell-fate determination.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 4395-4406 |
| Number of pages | 12 |
| Journal | Journal of Immunology |
| Volume | 150 |
| Issue number | 10 |
| State | Published - May 15 1993 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Immunology
Cite this
A Novel Cellular Model (SPGM 1) of Switching between the pre-B Cell and Myelomonocytic Lineages. / Martin, Michael; Strasser, Andreas; Baumgarth, Nicole; Cicuttini, Flavia M.; Welch, Karen; Salvaris, Evelyn; Boyd, Andrew W.
In: Journal of Immunology, Vol. 150, No. 10, 15.05.1993, p. 4395-4406.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A Novel Cellular Model (SPGM 1) of Switching between the pre-B Cell and Myelomonocytic Lineages
AU - Martin, Michael
AU - Strasser, Andreas
AU - Baumgarth, Nicole
AU - Cicuttini, Flavia M.
AU - Welch, Karen
AU - Salvaris, Evelyn
AU - Boyd, Andrew W.
PY - 1993/5/15
Y1 - 1993/5/15
N2 - The suspension pro granulocyte/macrophage (SPGM1) cell line was established from a transplantable mouse progranulocytic/promacrophage tumor. Surprisingly, SPGM1 cells expressed a typical CD5 pre-B cell phenotype, being positive for Ly-1 (CD5), PB76, B220 (CD45RA), and the pre-B Ig receptor complex (μH chains, λ5 and vpre-B surrogate L chains, and the IgMα (mb-1) and Igβ (B29) co-receptor molecules). Southern Blot analysis revealed clonal rearrangement of the μH chain locus and germ-line L chain loci. SPGM1 formed blast cell-, macrophage-, and occasional granulocytic colonies in soft agar in the presence of murine IL-3. IL-3 also induced macrophage differentiation of SPGM1 cells in suspension cultures. The earliest changes were detectable at 24 h by Northern blot analysis. IL-3-treatment increased Mac1 mRNA, induced c-fms mRNA, and down-regulated mRNA for μ, λ5, vpre-B and mb-1. After 2 to 4 days the cells were larger, strongly adherent, expressed the macrophage markers Mac1 and F4/80, had lost μH chain and PB76 surface expression, and readily phagocytosed latex beads. Thus SPGM1 has all the characteristic features of a CD5+ pre-B cell line. However, IL-3 predominantly induced SPGM1 to switch its differentiation program from a pre-B cell to a macrophage. This inducible, rapid switch of virtually the entire population provides a unique model for the molecular analysis of mechanisms involved in cell-fate determination.
AB - The suspension pro granulocyte/macrophage (SPGM1) cell line was established from a transplantable mouse progranulocytic/promacrophage tumor. Surprisingly, SPGM1 cells expressed a typical CD5 pre-B cell phenotype, being positive for Ly-1 (CD5), PB76, B220 (CD45RA), and the pre-B Ig receptor complex (μH chains, λ5 and vpre-B surrogate L chains, and the IgMα (mb-1) and Igβ (B29) co-receptor molecules). Southern Blot analysis revealed clonal rearrangement of the μH chain locus and germ-line L chain loci. SPGM1 formed blast cell-, macrophage-, and occasional granulocytic colonies in soft agar in the presence of murine IL-3. IL-3 also induced macrophage differentiation of SPGM1 cells in suspension cultures. The earliest changes were detectable at 24 h by Northern blot analysis. IL-3-treatment increased Mac1 mRNA, induced c-fms mRNA, and down-regulated mRNA for μ, λ5, vpre-B and mb-1. After 2 to 4 days the cells were larger, strongly adherent, expressed the macrophage markers Mac1 and F4/80, had lost μH chain and PB76 surface expression, and readily phagocytosed latex beads. Thus SPGM1 has all the characteristic features of a CD5+ pre-B cell line. However, IL-3 predominantly induced SPGM1 to switch its differentiation program from a pre-B cell to a macrophage. This inducible, rapid switch of virtually the entire population provides a unique model for the molecular analysis of mechanisms involved in cell-fate determination.
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UR - http://www.scopus.com/inward/citedby.url?scp=0027166745&partnerID=8YFLogxK
M3 - Article
VL - 150
SP - 4395
EP - 4406
JO - Journal of Immunology
JF - Journal of Immunology
SN - 0022-1767
IS - 10
ER -