Home Neuronal Signaling Adrenergic Receptor antagonist Naftopidil For research use only.

Naftopidil

Synonyms: KT-611

Naftopidil (KT-611) is a selective α1-adrenergic receptor antagonist with Ki of 3.7 nM, 20 nM, and 1.2 nM for α1a, α1b, and α1d, respectively, used for the treatment of benign prostatic hyperplasia.

Naftopidil Chemical Structure

Naftopidil Chemical Structure

CAS No. 57149-07-2

Purity & Quality Control

Naftopidil Related Products

Signaling Pathway

Adrenergic Receptor Signaling Pathways

Adrenergic Receptor Signaling Pathway

Biological Activity

Description Naftopidil (KT-611) is a selective α1-adrenergic receptor antagonist with Ki of 3.7 nM, 20 nM, and 1.2 nM for α1a, α1b, and α1d, respectively, used for the treatment of benign prostatic hyperplasia.
Targets
α1D-adrenergic receptor [1] α1A-adrenergic receptor [1] α1B-adrenergic receptor [1]
1.2 nM(Ki) 3.7 nM(Ki) 20 nM(Ki)
In vitro
In vitro Naftopidil is selective for the alpha1d-adrenoceptor with approximately 3- and 17-fold higher affinity than for the alpha1a- and alpha1b-adrenoceptor subtypes, respectively. [1] Naftopidil has growth inhibitory effect in androgen-sensitive and -insensitive human prostate cancer cell lines. Naftopidil induces p21(cip1) but not p27(kip1) in PC-3 cells. [2] Naftopidil induces apoptosis in all the investigated malignant mesothelioma cells, and a similar effect is obtained with prazosin, another α1-adrenoceptor blocker. Naftopidil-induced reduction in cell viability is inhibited by GF109203X, while prazosin-induced in cell viability is less affected. [3] Naftopidil, an alpha 1-adrenoreceptor antagonist produces a concentration-dependent inhibition ofcollagen-induced Ca2+ mobilization, maximum inhibition (22.9%) occurring with 40 mM Naftopidil. Naftopidil also inhibits the adrenaline-induced rise in [Ca2+]i in a concentration-dependent manner (30 mM doxazosin), significant inhibitions of platelet aggregation also being produced. [4] Naftopidil (0.3, 1, and 3 μM) inhibits 5-HT-induced bladder contraction in a concentration-dependent manner. Naftopidil inhibits both the 5-HT(2A) and 5-HT(2) receptor agonists-induced bladder contractions. Naftopidil binds to the human 5-HT(2A) and 5-HT(2B) receptors with pKi values of 6.55 and 7.82, respectively. [5]
In Vivo
In vivo Naftopidil selectively inhibits the phenylephrine-induced increase in prostatic pressure compared with mean blood pressure in the anesthetized dog model. [1] Naftopidil inhibits 5-HT-induced bladder contraction via blockade of the 5-HT(2A) and 5-HT(2B) receptors in rats. [5]
NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT00967772 Completed
Healthy
Dong-A ST Co. Ltd.
 September 2009 Phase 1

Chemical Information & Solubility

Molecular Weight 392.49 Formula

C24H28N2O3
CAS No. 57149-07-2 SDF Download Naftopidil SDF
Smiles COC1=CC=CC=C1N2CCN(CC2)CC(COC3=CC=CC4=CC=CC=C43)O
Storage (From the date of receipt)

In vitro
Batch:

DMSO : 17 mg/mL ( (43.31 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Water : Insoluble

Ethanol : Insoluble


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In vivo
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