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Dec 31st Santa Cruz will discontinue a
large number of polyclonal products as
a result of the USDA settlement that was
made public May 19th.

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To Purchase # 14774S

14774S 150 mg $189.00.0
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PhosphoSitePlus® Resource

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Western blot analysis of extracts from HeLa and NIH/3T3 cells, untreated (-) or treated with Chloroquine (50 μM, overnight; +), using LC3A/B (D3U4C) XP® Rabbit mAb #12741.

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Confocal immunofluorescent analysis of HeLa (upper) and C2C12 (lower) cells, treated with Chloroquine (50 μM, overnight; left), nutrient-starved with EBSS (3 hr; middle), or untreated (right), using LC3A/B (D3U4C) XP® Rabbit mAb #12741 (green) and β-Actin (13E5) Rabbit mAb (Alexa Fluor® 555 Conjugate) #8046 (red). Blue pseudocolor= DRAQ5® #4084 (fluorescent DNA dye).

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Chemical structure of chloroquine.

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Image

Product Usage Information

Chloroquine is supplied as a lyophilized powder. For a 50 mM stock, reconstitute the 150 mg in 5.82 ml sterile dH2O. First add 1 ml dH2O to the tube containing the chemical, vortex, and dispense into a new, larger tube. Repeat this action two or three more times to transfer any residual material. Add additional dH2O to the new tube to bring the volume up to 5.82 ml. Filter sterilize into sterile tube. Utilize a syringe and 0.2 μm syringe filter to minimize sample loss.

Working concentrations and length of treatment can vary depending on the desired effect, but it is typically used at 25-100 μM for 12-48 hr.


Storage: Store lyophilized at room temperature or in solution at -20ºC, desiccated. Protect from light. In lyophilized form, the chemical is stable for 24 months. Once in solution, use within 3 months to prevent loss of potency. Aliquot to avoid multiple freeze/thaw cycles.

Product Description

Molecular Weight:

515.9 g/mol


Purity:

>98%


Molecular Formula:

C18H26ClN3•2H3PO4


Chloroquine (CQ) is a lysosomotropic agent with an extensive range of biological effects (1). Historically known for its anti-malarial activity, chloroquine is a widely used biological research tool for studying autophagy inhibition. Research studies demonstrate that chloroquine accumulates in acidic lysosomes and increases the lysosomal pH. This inhibits lysosomal hydrolases and prevents autophagosomal fusion and degradation, which can result in apoptotic or necrotic cell death (1-4). Inhibition of chloroquine-induced apoptosis with the V-ATPase inhibitor bafilomycin A1 has been observed in several cell types (4). Chloroquine also enhances the anti-neoplastic effects of the histone deacetylase inhibitor vorinostat (SAHA) (5).

Chloroquine treatment of cells leads to accumulation of light chain 3-II (LC3-II) (1-3). This autophagy marker resides within autophagosomal membranes during the autophagic process and is degraded upon fusion with lysosomes. Chloroquine inhibition of these fusion events effectively blocks LC3-II degradation.


1.  Liang, X. et al. (2012) Cancer Res 72, 2791-801.

2.  Liang, X. et al. (2014) Cell Biosci 4, 10.

3.  Kung, C.P. et al. (2011) Crit Rev Eukaryot Gene Expr 21, 71-100.

4.  Shacka, J.J. et al. (2006) Mol Pharmacol 69, 1125-36.

5.  Carew, J.S. et al. (2007) Blood 110, 313-22.



For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
XP is a registered trademark of Cell Signaling Technology, Inc.
Alexa Fluor is a registered trademark of Life Technologies Corporation.
DRAQ5 is a registered trademark of Biostatus Limited.

14774
Chloroquine