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SML1837

Sigma-Aldrich

K-604

≥98% (HPLC)

Synonym(s):

2-[4-[2-(Benzimidazol-2-ylthio)ethyl]piperazin-1yl]-N-[2,4-bis(methylthio)-6-methyl-3-pyridyl]acetamide dihydrochloride, 4-[2-(1H-Benzimidazol-2-ylthio)ethyl]-N-[6-methyl-2,4-bis(methylthio)-3-pyridinyl]-1-piperazineacetamide dihydrochloride, K604

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About This Item

Empirical Formula (Hill Notation):
C23H30N6OS3 · 2HCl
CAS Number:
217094-32-1
Molecular Weight:
575.64
UNSPSC Code:
41106500
NACRES:
NA.77

Quality Level

100

Assay

≥98% (HPLC)

storage condition

desiccated

color

white to beige

solubility

DMSO: 10 mg/mL, clear

storage temp.

2-8°C

SMILES string

O=C(NC1=C(SC)C=C(C)N=C1SC)CN2CCN(CCSC3=NC4=CC=CC=C4N3)CC2.[H]Cl.[H]Cl

Biochem/physiol Actions

K-604 inhibits against acyl-coenzyme A (acyl-CoA):cholesterol O-acyltransferase-1 (ACAT1, SOAT1) activitiy in a selective (IC50 = 450 nM vs. 102.85 μ M against human ACAT1 and ACAT2, respectively) and acyl-CoA-competitive (Ki = 378 nM against oleoyl-coA) manner. K-604 inhibits cholesterol esterification in human monocyte-derived macrophages (IC50 = 68.0 nM) and enhances cholesterol efflux from THP-1 macrophages in response to HDL3 or apolipoprotein A-I. Oral administration is efficacious against macrophage foam cell formation and atherosclerosis progression among F1B hamsters on a high-fat diet (1-10 mg/kg/day) and apoE-knockout mice (60 mg/kg/day) without affecting plasma cholesterol levels. K-604 is also reported to stimulate autophagy-mediated P301L-Tau degradation in cortical neurons from 3XTg-AD mice (500 nM).

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Yohei Shibuya et al.
Neurobiology of aging, 36(7), 2248-2259 (2015-05-02)
Patients with Alzheimer's disease (AD) display amyloidopathy and tauopathy. In mouse models of AD, pharmacological inhibition using small molecule enzyme inhibitors or genetic inactivation of acyl-coenzyme A (Acyl-CoA):cholesterol acyltransferase 1 (ACAT1) diminished amyloidopathy and restored cognitive deficits. In microglia, ACAT1
Mami Ikenoya et al.
Atherosclerosis, 191(2), 290-297 (2006-07-06)
Acyl-coenzyme A:cholesterol O-acyltransferase-1 (ACAT-1), a major ACAT isozyme in macrophages, plays an essential role in foam cell formation in atherosclerotic lesions. However, whether pharmacological inhibition of macrophage ACAT-1 causes exacerbation or suppression of atherosclerosis is controversial. We developed and characterized
Emily R Stevenson et al.
The Journal of pharmacology and experimental therapeutics, 382(3), 356-365 (2022-08-16)
Acute lung injury (ALI) is characterized by epithelial damage, barrier dysfunction, and pulmonary edema. Macrophage activation and failure to resolve play a role in ALI; thus, macrophage phenotype modulation is a rational target for therapeutic intervention. Large, lipid-laden macrophages have
Yasunobu Yoshinaka et al.
Atherosclerosis, 213(1), 85-91 (2010-09-17)
Acyl-coenzyme A:cholesterol O-acyltransferase-1 (ACAT-1) plays an essential role in macrophage foam cell formation and progression of atherosclerosis. We developed a potent and selective ACAT-1 inhibitor, K-604, and tested its effects in apoE-knockout mice. Administration of K-604 to 8-week-old apoE-knockout mice
Rik van der Kant et al.
Cell stem cell, 24(3), 363-375 (2019-01-29)
Genetic, epidemiologic, and biochemical evidence suggests that predisposition to Alzheimer's disease (AD) may arise from altered cholesterol metabolism, although the molecular pathways that may link cholesterol to AD phenotypes are only partially understood. Here, we perform a phenotypic screen for

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