QUINOMYCIN A Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R46:Kann vererbbare Sch?den verursachen.
R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
S-S?tze Betriebsanweisung:
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
Beschreibung
Hypoxia-
inducible factor-
1 (HIF-
1) is a transcription factor that controls genes involved in glycolysis, angiogenesis, migration, and invasion. Echinomycin is a cell-
permeable inhibitor of HIF-
1-
mediated gene transcription. It acts by intercalating into DNA in a sequence-
specific manner, blocking the binding of either HIF-
1α or HIF-
1β to the hypoxia-
responsive element. Echinomycin reversibly inhibits hypoxia-
induced HIF-
1 transcription activity in U215 cells with an EC
50 value of 1.2 nM. It inhibits hypoxia-
induced expression of vascular endothelial growth factor, blocking angiogenesis and altering excitatory synaptic transmission in hippocampal neurons. Echinomycin also impairs expression of survivin, enhancing the sensitivity of multiple myeloma cells to melphalan.
Verwenden
Quiniomycin A is a cyclic depsipeptide metabolite. Quinomycin A has broad activity against bacteria, fungi and viruses, and has found application as an antitumour agent. Quinomycin A acts by bifunctional intercalation of nucleic acids. Recent research has shown quinomycin A to be an extremely potent inhibitor of hypoxia-inducible factor-1 (HIF-1). This transcription factor plays an essential role in tumour progression and metastasis.
Biochem/physiol Actions
Echinomycin is an antitumor antibiotic and potent hypoxia inducible factor 1α (HIF-1α) inhibitor. It binds to DNA via bifunctional intercalation, blocking the binding of HIF-1α, a transcription factor important in tumor growth. Echinomycin selectively eliminated cancer stem cells in a study with mouse lymphoma and human AML xenogeneic models, eradicating the lymphomas. Recently, echinomycin was also found to act as an antibiotic adjuvant having synergistic effects with novobiocin in gram negative bacteria.
QUINOMYCIN A Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
