Abstract |
The human promyelocytic leukemia cell line HL60 differentiates to either granulocytes or monocytes/macrophages when induced with various chemicals and lymphokines. Retinoic acid (RA) induces HL60 to differentiate to granulocyte-like cells. However, HL60/MRI cells, derived from a transplantable HL60 tumor established in athymic nude mice, differentiate to monocytoid cells when cultured with RA in vitro. HL60/MRI induced with RA are monocytes based on morphology and the expression of markers and functions specific for monocytes such as: the OKM5 monocyte-specific antigen, nonspecific esterase activity, and adhesiveness. HL60/MRI is much more sensitive to RA than is HL60. Thus, the RA concentrations that induce 50% differentiation are 0.41 nM for HL60/MRI and 37 nM for HL60, and maximum differentiation occurs at 2 days for HL60/MRI and at 4 days for HL60. While RA induces HL60/MRI to monocytoid cells, other inducers of granulocytic differentiation of HL60, such as dimethyl sulfoxide and hexamethylene bisacetamide, induce HL60/MRI to granulocytes. Furthermore, 12-O-tetradecanoylphorbol-13-acetate induces both HL60 and HL60/MRI to macrophage-like cells. The isozyme phenotypes of HL60/MRI and HL60 are identical. Cytogenetic analysis of HL60/MRI indicates that many of its normal chromosomes are triploid and that it has five abnormal chromosome markers, M1-M5, three of which, M1-M3, are seen also in HL60. This unique cell line, HL60/MRI, may be useful for studying the event(s) triggering differentiation of myelomonocytic cells and the mechanism of action of RA.
|
Authors | M Imaizumi, J Uozumi, T R Breitman |
Journal | Cancer research
(Cancer Res)
Vol. 47
Issue 5
Pg. 1434-40
(Mar 01 1987)
ISSN: 0008-5472 [Print] United States |
PMID | 3469018
(Publication Type: Journal Article, Research Support, U.S. Gov't, P.H.S.)
|
Chemical References |
- Acetamides
- Antigens, Surface
- Isoenzymes
- Tretinoin
- hexamethylene bisacetamide
- Tetradecanoylphorbol Acetate
- Dimethyl Sulfoxide
|
Topics |
- Acetamides
(pharmacology)
- Animals
- Antigens, Surface
(analysis)
- Cell Differentiation
(drug effects)
- Cell Line
- Chromosome Aberrations
- Dimethyl Sulfoxide
(pharmacology)
- Humans
- Isoenzymes
(analysis)
- Leukemia, Myeloid, Acute
(genetics, pathology)
- Mice
- Mice, Inbred BALB C
- Monocytes
(immunology, pathology)
- Neoplasm Transplantation
- Tetradecanoylphorbol Acetate
(pharmacology)
- Tretinoin
(pharmacology)
|