PICLAMILAST

Details

Stereochemistry	ACHIRAL
Molecular Formula	C18H18Cl2N2O3
Molecular Weight	381.253
Optical Activity	NONE
Defined Stereocenters	0 / 0
E/Z Centers	0
Charge	0

SHOW SMILES / InChI

Structure Search

SMILES

COC1=C(OC2CCCC2)C=C(C=C1)C(=O)NC3=C(Cl)C=NC=C3Cl

InChI

InChIKey=RRRUXBQSQLKHEL-UHFFFAOYSA-N

InChI=1S/C18H18Cl2N2O3/c1-24-15-7-6-11(8-16(15)25-12-4-2-3-5-12)18(23)22-17-13(19)9-21-10-14(17)20/h6-10,12H,2-5H2,1H3,(H,21,22,23)

HIDE SMILES / InChI

Description
Sources: https://newdrugapprovals.org/2014/03/19/piclamilast/
Curator's Comment: description was created based on several sources, including: http://adisinsight.springer.com/drugs/800004110 http://www.drugbank.ca/drugs/DB01791 https://www.ncbi.nlm.nih.gov/pubmed/7613200 https://www.ncbi.nlm.nih.gov/pubmed/9316851

Piclamilast (RP 73401), is a selective PDE4 inhibitor. It is comparable to other PDE4 inhibitors for its anti-inflammatory effects. It has been investigated for its applications to the treatment of conditions such as asthma, dermatitis, rheumatoid arthritis. Emesis is the most commonly cited side effect of piclamilast.

Originator

Approval Year

Targets

Primary Target	Pharmacology	Potency
Phosphodiesterase 4B 11 Target ID: CHEMBL275 Sources: https://www.ncbi.nlm.nih.gov/pubmed/15576036	Inhibitor 8297	0.041 nM [IC50]
Phosphodiesterase 4D 14 Target ID: CHEMBL288 Sources: https://www.ncbi.nlm.nih.gov/pubmed/15576036	Inhibitor 8297	0.021 nM [IC50]
Phosphodiesterase 4A 13 Target ID: CHEMBL254 Sources: https://www.ncbi.nlm.nih.gov/pubmed/15339393	Inhibitor 8297
Phosphodiesterase 4 52 Target ID: CHEMBL2093863 Sources: https://www.ncbi.nlm.nih.gov/pubmed/8762090 \| https://www.ncbi.nlm.nih.gov/pubmed/11259554	Inhibitor 8297	0.0012 µM [IC50]
Cytochrome P450 2B6 19 Target ID: CHEMBL4729 Sources: https://www.ncbi.nlm.nih.gov/pubmed/9316851	Substrate 661

Conditions

Condition	Modality	Highest Phase	Product
Allergic asthma 6 Sources: https://www.ncbi.nlm.nih.gov/pubmed/16875702	Primary	Preclinical	Unknown Approved Use Unknown
Immunological dermatitis 1 Sources: https://www.ncbi.nlm.nih.gov/pubmed/10748277 http://adisinsight.springer.com/drugs/800004110	Primary	Preclinical	Unknown Approved Use Unknown
Rheumatoid arthritis 316 Sources: http://adisinsight.springer.com/drugs/800004110 https://www.ncbi.nlm.nih.gov/pubmed/14998551	Primary	Preclinical	Unknown Approved Use Unknown

PubMed

Title	Date	PubMed
The effect of selective phosphodiesterase inhibitors in comparison with other anti-asthma drugs on allergen-induced eosinophilia in guinea-pig airways.	1995 Feb	8535097
In vivo efficacy in airway disease models of roflumilast, a novel orally active PDE4 inhibitor.	2001 Apr	11259555
Anti-inflammatory and immunomodulatory potential of the novel PDE4 inhibitor roflumilast in vitro.	2001 Apr	11259554
Potential role of phosphodiesterase 7 in human T cell function: comparative effects of two phosphodiesterase inhibitors.	2002 Jun	12067300
Essential requirements for substrate binding affinity and selectivity toward human CYP2 family enzymes.	2003 Jan 1	12464242
Effects of piclamilast, a selective phosphodiesterase-4 inhibitor, on oxidative burst of sputum cells from mild asthmatics and stable COPD patients.	2004	15765929
Differential effect of phosphodiesterase IV inhibitor RP73401 on various inflammatory and immune responses relevent to rheumatoid arthritis.	2004 May	14998551
Phosphodiesterase IV inhibition by piclamilast potentiates the cytodifferentiating action of retinoids in myeloid leukemia cells. Cross-talk between the cAMP and the retinoic acid signaling pathways.	2004 Oct 1	15292163
Effects of ciclamilast, a new PDE 4 PDE4 inhibitor, on airway hyperresponsiveness, PDE4D expression and airway inflammation in a murine model of asthma.	2006 Oct 10	16956605
Correlation between emetic effect of phosphodiesterase 4 inhibitors and their occupation of the high-affinity rolipram binding site in Suncus murinus brain.	2007 Nov 14	17658510
Phosphodiesterase-4 inhibition attenuates pulmonary inflammation in neonatal lung injury.	2008 Mar	18094015
PDE8 regulates rapid Teff cell adhesion and proliferation independent of ICER.	2010 Aug 9	20711499
Cytokine-dependent balance of mitogenic effects in primary human lung fibroblasts related to cyclic AMP signaling and phosphodiesterase 4 inhibition.	2010 May	20082309
Effects of phosphodiesterase 4 inhibition on bleomycin-induced pulmonary fibrosis in mice.	2010 May 5	20444277
Pharmacological validation of Trypanosoma brucei phosphodiesterases B1 and B2 as druggable targets for African sleeping sickness.	2011 Dec 8	22023548

Patents

Sample Use Guides

In Vivo Use Guide

1, 3 and 10 mg/kg were orally administered once daily

Route of Administration: Oral

In Vitro Use Guide

RP 73401 (IC50: 6.9 +/- 3.3 nM, n = 5) was 71 fold more potent than (+/-)-rolipram (IC50: 490 +/- 260 nM, n = 4) in inhibiting LPS-induced TNF alpha release from monocytes. RP 73401 (IC50: 2 nM) was 180 fold more potent than rolipram (IC50: 360 nM) in suppressing LPS (10 ng ml-1)-induced TNF alpha mRNA.

Name

Type

Language

PICLAMILAST

Official Name

English

BENZAMIDE, 3-(CYCLOPENTYLOXY)-N-(3,5-DICHLORO-4-PYRIDINYL)-4-METHOXY-

Systematic Name

English

RPR-73401

Code

English

3-(CYCLOPENTYLOXY)-N-(3,5-DICHLORO-4-PYRIDYL)-P-ANISAMIDE

Common Name

English

Piclamilast [WHO-DD]

Common Name

English

RP-73401

Code

English

PICLAMILAST [USAN]

Common Name

English

piclamilast [INN]

Common Name

English

RP73401

Code

English

Classification Tree Code System Code

NCI_THESAURUS

C744