Abstract |
We studied the effects of hibarimicins and hibarimicin-related compounds produced by Microbispora rosea subsp. hibaria [ glycosides (hibarimicins A, B, C, D, E, G, H and I) and aglycon ( hibarimicinone)] or compounds produced by its mutants [ glycosides (HMP-P4 and -Y6), aglycons (HMP-P1 and -Y1) and shunt products (HMP-M1, M2, M3 and -M4)] on v- Src tyrosine kinase and growth and differentiation of human myeloid leukemia HL-60 cells. Among them, hibarimicin B was a strong and the most selective v- Src kinase inhibitor with differentiation inducing activity of HL-60 cells. Hibarimicin E similarly induced HL-60 cell differentiation but had no v- Src kinase inhibitory activity. Hibarimicinone was the most potent v- Src kinase inhibitor, although less selective, and did not induce differentiation of HL-60 cells. Hibarimicin B competitively inhibited ATP binding to the v- Src kinase, but hibarimicinone showed noncompetitive inhibition. These two compounds, however, showed similar mixed types of inhibition against a Src substrate binding to the v- Src kinase. Altogether, these results suggest that signaling molecules other than Src might be more important in the differentiation induction of HL-60 cells.
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Authors | Sung Ig Cho, Hidesuke Fukazawa, Yoshio Honma, Takayuki Kajiura, Hiroshi Hori, Yasuhiro Igarashi, Tamotsu Furumai, Toshikazu Oki, Yoshimasa Uehara |
Journal | The Journal of antibiotics
(J Antibiot (Tokyo))
Vol. 55
Issue 3
Pg. 270-8
(Mar 2002)
ISSN: 0021-8820 [Print] England |
PMID | 12014442
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Anti-Bacterial Agents
- Enzyme Inhibitors
- Glycosides
- Naphthacenes
- hibarimicin B
- hibarimicinone
- src-Family Kinases
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Topics |
- Actinomycetales
(metabolism)
- Anti-Bacterial Agents
(biosynthesis, chemistry, pharmacology)
- Cell Differentiation
(drug effects)
- Cell Division
(drug effects)
- Enzyme Inhibitors
(chemistry, metabolism, pharmacology)
- Glycosides
(biosynthesis, chemistry, pharmacology)
- HL-60 Cells
- Humans
- Naphthacenes
(chemistry, pharmacology)
- src-Family Kinases
(antagonists & inhibitors)
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