Establishment and characterization of pro-B cell lines from motheaten mutant mouse defective in SHP-1 protein tyrosine phosphatase.
Mice homozygous for the motheaten (Hcph(me)) mutation lack a functional SHP-1 protein tyrosine phosphatase, show severe immunologic dysregulation and die at an early age. Severe pneumonitis in me/me mice is associated with abnormal proliferation of macrophages and granulocytes. Overgrowth of macrophages in long term cultures of me/me bone marrow has prevented analyses of lymphopoiesis in vitro. To establish hematopoietic cell lines from me/me mice, we cultured me/me bone marrow with the PA6 stromal cell line in the presence of antagonistic antibody against the receptor (c-Fms) for macrophage colony stimulating factor (M-CSF). In these cultures, overgrowth of M-CSF-dependent macrophages was suppressed by the antagonistic antibody and other hemopoietic cell lineages were generated efficiently from me/me bone marrow. By using this culture system, we established me/me pro-B cell clones (MEBs) with rearranged DH-JH but not VH-DJH. The growth of MEB clones required IL-7 and c-Kit ligand, corresponding to normal pro-B cells which express SHP-1. MEB cells were sensitive to starvation by either IL-7 or c-Kit ligand, resulting in apoptotic death. The present culture system, which supports hematopoiesis of me/me bone marrow, provides useful tools for the determination of the role of SHP-1 in signal transduction of B lymphopoiesis.
Miyamoto
A
A
Department of Immunology, School of Life Science, Faculty of Medicine, Tottori University, Yonago, Japan.
Kunisada
T
T
Yamazaki
H
H
Miyake
K
K
Nishikawa
S I
SI
Sudo
T
T
Shultz
L D
LD
Hayashi
S I
SI
D000818:Animals; D017209:Apoptosis / Q000502:physiology; D001402:B-Lymphocytes / Q000166:cytology* / Q000201:enzymology* / Q000378:metabolism; D001854:Bone Marrow Cells / Q000166:cytology; D002453:Cell Cycle / Q000502:physiology; D002460:Cell Line; D005260:Female; D015326:Gene Rearrangement, B-Lymphocyte, Heavy Chain; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000378:metabolism; D015851:Interleukin-7 / Q000494:pharmacology; D047908:Intracellular Signaling Peptides and Proteins; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D016513:Mice, SCID; D009154:Mutation; D054592:Protein Tyrosine Phosphatase, Non-Receptor Type 11; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6; D017027:Protein Tyrosine Phosphatases / Q000235:genetics* / Q000378:metabolism; D019009:Proto-Oncogene Proteins c-kit / Q000378:metabolism / Q000494:pharmacology; D015398:Signal Transduction / Q000502:physiology
D015851:Interleukin-7; D047908:Intracellular Signaling Peptides and Proteins; D019009:Proto-Oncogene Proteins c-kit; D054592:Protein Tyrosine Phosphatase, Non-Receptor Type 11; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6; D017027:Protein Tyrosine Phosphatases; C516725:Ptpn11 protein, mouse; C509248:Ptpn6 protein, mouse