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Catalog No.
Selective SRPK1 inhibitor
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SizePriceStock Qty
10mM (in 1mL DMSO)
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In stock
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SRPIN340 is a highly selective inhibitor of SR protein phosphorylation with a Ki value of 0.89μM for SRPK1 [1].

SRPIN340 has been revealed to inhibit replication of HIV-1 and other viruses that require SR protein-dependent RNA processing for the propagation in HIV-1 transfected or infected Flp-In293 cell lines. In addition, SRPIN340 has been reported to significantly inhibit SRPK1 and SRPK2 kinase activity but not potently inhibit other SRPKs, such as Clk1 and Clk4 with a Ki value of 0.89μM for SRPK1. Besides, SRPIN340 has been exhibited to dose-dependently promote degradation of SRp75 which is necessary for HIV expression. Moreover, SRPIN340 has shown the inhibition of propagation of Sindbis virus with an IC50 of 60μM and the protection against the cytopathic effect of Sindbis virus [1].

[1] Fukuhara T1, Hosoya T, Shimizu S, Sumi K, Oshiro T, Yoshinaka Y, Suzuki M, Yamamoto N, Herzenberg LA, Herzenberg LA, Hagiwara M.Utilization of host SR protein kinases and RNA-splicing machinery during viral replication. Proc Natl Acad Sci U S A. 2006 Jul 25;103(30):11329-33. Epub 2006 Jul 13.

Chemical Properties

Physical AppearanceA solid
StorageStore at -20°C
Cas No.218156-96-8
Solubility≥10.9mg/mL in DMSO
Chemical NameN-[2-piperidin-1-yl-5-(trifluoromethyl)phenyl]pyridine-4-carboxamide
SDFDownload SDF
Canonical SMILESC1CCN(CC1)C2=C(C=C(C=C2)C(F)(F)F)NC(=O)C3=CC=NC=C3
Shipping ConditionEvaluation sample solution: ship with blue ice. All other available sizes: ship with RT, or blue ice upon request.
General tipsFor obtaining a higher solubility, please warm the tube at 37°C and shake it in the ultrasonic bath for a while. Stock solution can be stored below -20°C for several months.


Cell experiment [1]:

Cell lines

A375, Omm2.5, Mel270 and 92.1 cells

Preparation method

The solubility of this compound in DMSO is >10.9mg/mL. General tips for obtaining a higher concentration: Please warm the tube at 37℃ for 10 minutes and/or shake it in the ultrasonic bath for a while. Stock solution can be stored below -20℃ for several months.

Reacting condition

10 μM; 24 hours


In A375 cells, SRPIN340 resulted in a 54% reduction in the IGF-1 induced nuclear localisation of SRSF1. In Mel270 cells, SRPIN340 significantly reduced the proportion of nuclear SRSF1 compared with IGF-1 treatment alone. In A375, Omm2.5 and 92.1 cells, SRPIN340 reduced total VEGF protein.

Animal experiment [1]:

Animal models

Mice bearing A375-untransfected tumours

Dosage form

100 μl of 20 μg/ml SRPIN340 (diluted 100× in PBS from 2mg/ml stock in DMSO); injected daily into the peritumoral space


In mice bearing A375-untransfected tumours, SRPIN340 significantly reduced tumour growth compared with DMSO control-injected tumours. SRPIN340 also reduced total VEGF expression and significantly reduced microvascular density (MVD).

Other notes

Please test the solubility of all compounds indoor, and the actual solubility may slightly differ with the theoretical value. This is caused by an experimental system error and it is normal.


[1]. M V Gammons, R Lucas, R Dean, et al. Targeting SRPK1 to control VEGF-mediated tumour angiogenesis in metastatic melanoma. Br J Cancer. 2014 Jul 29; 111(3): 477-485.

Biological Activity

Description SRPIN340 is a selective inhibitor of SRPK with a Ki value of 0.89 μM for SRPK1.
Targets SRPK1          
IC50 0.89 μM(Ki)          

Quality Control

Quality Control & MSDS

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Chemical structure