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U3633

Sigma-Aldrich

U 18666A

powder

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Synonym(s):
(3β)-3-[2-(Diethylamino)ethoxy]androst-5-en-17-one hydrochloride
Empirical Formula (Hill Notation):
C25H41NO2·HCl
CAS Number:
3039-71-2
Molecular Weight:
424.06
MDL number:
MFCD00210908
UNSPSC Code:
12352200
PubChem Substance ID:
24724638
NACRES:
NA.77

Assay

≥98% (HPLC)

form

powder

color

white to off-white

mp

195-196.5 °C (lit.)

solubility

H2O: 10 mg/mL≥

storage temp.

2-8°C

SMILES string

Cl[H].[H][C@@]12CC=C3C[C@H](CC[C@]3(C)[C@@]1([H])CC[C@]4(C)C(=O)CC[C@@]24[H])OCCN(CC)CC

InChI

1S/C25H41NO2.ClH/c1-5-26(6-2)15-16-28-19-11-13-24(3)18(17-19)7-8-20-21-9-10-23(27)25(21,4)14-12-22(20)24;/h7,19-22H,5-6,8-17H2,1-4H3;1H/t19-,20-,21-,22-,24-,25-;/m0./s1

InChI key

GZFYZYBWLCYBMI-MYZJJQSMSA-N

General description

U18666A, a cationic amphiphile/sterol, has a diethylaminoethyl chain linked to the 3-hydroxyl. It is an androstenolone derivative.

Application

U 18666A has been used in fibroblast controls to study the mechanism of increase in autophagy in Niemann-Pick Disease Type C (NPC) cells.
U 18666A has been used:
  • as a competitive inhibitor of the Niemann-Pick disease, type C (NPC2) binding partner Niemann-Pick C1 (NPC1) to treat symbiotic and aposymbiotic adult Aiptasia to study the effect of global sterol transport inhibition
  • in treating seminiferous tubules to study its effects on the localization pattern of VPS35-positive vesicles
  • to study the U18666A treatment effects on early endosomes and late endosomes/multivesicular bodies (MVBs)
  • as an NPC1 inhibitor to test its in vivo efficacy and study its effects on filovirus entry and infection

Biochem/physiol Actions

U18666A, a Niemann-Pick phenotype inducer, can inhibit the lysosomal cholesterol export and Ebola infection.
Inhibitor of cholesterol synthesis (inhibits desmosterol Δ24-reductase). Weak inhibitor of hedgehog (hh) signaling.

Preparation Note

U 18666A is soluble in water at 10 mg/ml.

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

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Mee Kian Poh et al.
Antiviral research, 93(1), 191-198 (2011-12-08)
The level of cholesterol in host cells has been shown to affect viral infection. However, it is still not understood why this level of regulation is important for successful infection. We have shown in this study that dengue virus infection
Anton I Rosenbaum et al.
Proceedings of the National Academy of Sciences of the United States of America, 107(12), 5477-5482 (2010-03-10)
Niemann-Pick type C disease (NPC) is a lysosomal storage disorder causing accumulation of unesterified cholesterol in lysosomal storage organelles. Recent studies have shown that hydroxypropyl-beta-cyclodextrin injections in npc1(-/-) mice are partially effective in treating this disease. Using cultured fibroblasts, we
Elena Piccoli et al.
Biochemical pharmacology, 82(9), 1234-1249 (2011-09-01)
Patients treated with amiodarone accumulate lysobisphosphatidic acid (LBPA), also known as bis(monoacylglycero)phosphate, in airway secretions and develop in different tissues vacuoles and inclusion bodies thought to originate from endosomes. To clarify the origin of these changes, we studied in vitro
Hanna Appelqvist et al.
The American journal of pathology, 178(2), 629-639 (2011-02-02)
In the past decade, lysosomal membrane permeabilization (LMP) has emerged as a significant component of cell death signaling. The mechanisms by which lysosomal stability is regulated are not yet fully understood, but changes in the lysosomal membrane lipid composition have
Marie-Claude Battista et al.
The Prostate, 70(9), 921-933 (2010-02-19)
Seladin-1 belongs to a subgroup of androgen-dependent genes associated with anti-proliferative, pro-differentiation, and pro-apoptotic functions and plays a protective role against oncogenic stress. The present study aims to investigate the localization and expression of Seladin-1 protein in normal and tumoral
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