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5.32758

Sigma-Aldrich

IRE1α Inhibitor, MKC-3946

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Synonym(s):
IRE1α Inhibitor, MKC-3946, XBP1 expression blocker, MKC3946, MKC 3946
Empirical Formula (Hill Notation):
C21H20N2O3S
CAS Number:
Molecular Weight:
380.46
UNSPSC Code:
12352200
NACRES:
NA.77

Assay

≥97% (HPLC)

Quality Level

form

powder

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze
protect from light

color

dark yellow

solubility

DMSO: 25 mg/mL

storage temp.

−20°C

General description

A cell-permeable compound that binds to the endoribnuclease domain of IRE1α and inhibits its activity. Blocks XBP1 mRNA splicing in RPMI 8226 human multiple myeloma cells.
A cell-permeable naphthaldehyde derived compound that binds to the endoribnuclease domain of inositol requiring enzyme1α (IRE1α) to inhibit its activity and blocks X-box binding protein 1 (XBP1) mRNA splicing in RPMI 8226 human multiple myeloma (MM) cells. Down-regulates SEC61A1, p58IPK, and ERdj4 genes that are targeted by XBP1. Also shown to block XBP1s expression induced by tunicamycin without affecting the phosphorylation of IRE1a (50 mg/kg, i.p). Shown to enhance bortezomib (Cat. No. 504314) and 17-AAG (Cat. No, 100068) induced toxicity and apoptosis in RPMI8226 and INA6 cells. However, it does not have any significant effect on normal mononuclear cells. Suppresses the growth of RPMI 8226 xenografts in a model of human MM in mice (50 mg/kg, i.p.).
A cell-permeable naphthaldehyde derived compound that binds to the endoribnuclease domain of inositol requiring enzyme1α (IRE1α) to inhibit its activity and blocks X-box binding protein 1 (XBP1) mRNA splicing in RPMI 8226 human multiple myeloma (MM) cells. Down-regulates SEC61A1, p58IPK, and ERdj4 genes that are targeted by XBP1. Also shown to block XBP1s expression induced by tunicamycin without affecting the phosphorylation of IRE1a (50 mg/kg, i.p). Shown to enhance bortezomib (Cat. No. 504314) and 17-AAG (Cat. No, 100068) induced toxicity and apoptosis in RPMI8226 and INA6 cells. However, it does not have any significant effect on normal mononuclear cells. Suppresses the growth of RPMI 8226 xenografts in a model of human MM in mice (50 mg/kg, i.p.).

Please note that the molecular weight for this compound is batch-specific due to variable water content.

Biochem/physiol Actions

Cell permeable: yes
Primary Target
IRE1

Warning

Toxicity: Standard Handling (A)

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.

Other Notes

Mimura, N., et al. 2012. Blood.119, 5772.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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