| | Identification | Back Directory |  | [Name] 
 Piclamilast
 |  | [CAS] 
 144035-83-6
 |  | [Synonyms] 
 RP 73401
 RPR 73401
 piclamilas
 Piclamilast
 N-(3,5-Dichloropyrid-4-yl)-3-cyclopentyloxy-4-methoxybenzamide
 3-(cyclopentyloxy)-N-(3,5-dichloro-4-pyridyl)-4-methoxybenzamide
 3-(Cyclopentyloxy)-N-(3,5-dichloro-4-pyridinyl)-4-methoxybenzamide
 3-(Cyclopentyloxy)-N-(3,5-dichloropyridin-4-yl)-4-methoxybenzamide
 Benzamide,3-(cyclopentyloxy)-N-(3,5-dichloro-4-pyridinyl)-4-methoxy-
 |  | [Molecular Formula] 
 C18H18Cl2N2O3
 |  | [MOL File] 
 144035-83-6.mol
 |  | [Molecular Weight] 
 381.25
 | 
 | Chemical Properties | Back Directory |  | [Boiling point ] 
 447.8±45.0 °C(Predicted)
 |  | [density ] 
 1.370
 |  | [storage temp. ] 
 2-8°C
 |  | [solubility ] 
 DMSO: soluble20mg/mL, clear
 |  | [form ] 
 powder
 |  | [pka] 
 10.10±0.70(Predicted)
 |  | [color ] 
 white to beige
 | 
 | Hazard Information | Back Directory |  | [Uses] 
 Piclamilast is a potent and selective phosphodiesterase-4 (PDE4) inhibitor. Piclamilast may offer therapeutic strategies in respiratory diseases, including asthma and chronic obstructive pulmonary disease. Piclamilast may also provide a treatment option for pre-term infants with bronchopulmonary dysplasia (BPD).
 |  | [Definition] 
 ChEBI: A monocarboxylic acid amide resulting from the formal condensation of the carboxy group of 3-(cyclopentyloxy)-4-methoxybenzoic acid with the primary amino group of 3,5-dichloropyridin-4-amine.
 |  | [Biological Activity] 
 Piclamilast is a potent and selective cyclic AMP phosphodiesterase-4 inhibitor th at exhibits equalhigh affinity for both the PDE4 high- and low-affinity rolipram binding states (HARBS and LARBS). Recent studies shown th at piclamilast inhibits Trypanosoma brucei PDEB1 (TbrPDEB1) and TbrPDEB2.''Piclamilast is also known as N-(3,5-dichloropyrid-4-yl)-3-cyclopentyloxy-4-methoxybenzamide. Piclamilast regulates the cAMP (cyclic adenosine monophosphate) signaling pathway. It increases the retinoid-dependent transactivation and the degradation of retinoic acid receptor α (RARα).
 |  | [in vivo] 
 
 Piclamilast (RP 73401, 10 mg/kg, 30 min) alone does not affect the MST of leukemia-bearing animals. Piclamilast combined with ATRA (HY-14649) significantly more effective than ATRA alone in increasing the MST (40 days; interval 34–45 days) of leukemia-bearing animals[3]. | Animal Model: | SCID mice[3]. |  | Dosage: | 10 mg/kg (combined with ATRA (HY-14649)). |  | Administration: | Injection daily. |  | Result: | Significantly more effective than ATRA alone in increasing the MST (40 days; interval 34–45 days) of leukemia-bearing animals. | 
 |  | [IC 50] 
 PDE4: 16 nM (IC50, in pig aorta); PDE4: 2 nM (IC50, in eosinophil soluble); PDE1: >100 μM (IC50); PDE2: 40 μM (IC50); PDE3: >100 μM (IC50); PDE5: 14 μM (IC50)
 |  | [storage] 
 Store at RT
 | 
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