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Fiduxosin

MCE 国际站：Fiduxosin

品牌：MedChemExpress (MCE)

货号：HY-U00399

CAS 号：208993-54-8

生物活性：菲度索辛是一种强效的α1-肾上腺素受体拮抗剂，对α1a-、α1b-和α1d-肾上腺素受体的Ki值分别为0.160 nM、24.9 nM和0.920 nM。

体外研究(In Vitro)：Fiduxosin displays low affinity for other adrenoceptors, including cloned human α2a- (92 nM) and α2c-adrenoceptors (22 nM) and rat neonatal lung α2b-adrenoceptors (21 nM), in addition to β-adrenoceptors (2-5 μM). Fiduxosin also has low affinity for 5HT1A receptors in rat cortex (29 nM) compared with its affinity at α1a-adrenoceptors (0.16 nM). Fiduxosin antagonizes competitively PE-induced responses with a pA2 value of 7.58, in the rabbit urethra[1]. MCE尚未独立确认这些方法的准确性。 仅供参考。

体内研究(In Vivo)：Fiduxosin (30, 100, and 300 μg/kg, i.v.) antagonizes IUP responses to i.v. EPI in anesthetized dogs. Fiduxosin (178, 592, and 1780 μg/kg, i.v.) elicits transient effects on blood pressure, with no effect of the lowest dose on MAP in spontaneously hypertensive rats (SHR). Fiduxosin (3 μmol/kg or 1780 μg/kg i.v.) slightly reduces MAP, but head-up tilt causes further diminution of MAP at only the 15-min observation with minimal additional changes in MAP at times ≥30 min postdosing in SHR[1]. Fiduxosin (0.1, 0.3, 1.0, and 3.0 mg/kg p.o.) blocks prostatic intraurethral pressure (IUP) responses to a greater extent than MAP responses. The IUP ED50 values of fiduxosin is 0.24 mg/kg[2]. MCE尚未独立确认这些方法的准确性。 仅供参考。

分子量：555.65

Formula：C30H29N5O4S

运输条件：美国大陆地区的室温；其他地区可能有所不同。

储存方式：请按照分析证书中推荐的条件储存产品。

Animal Administration [2]：Male beagle dogs (>2 years old, 12-15 kg) are chronically instrumented for the continuous measurement of arterial blood pressure by implanting a telemetry transducer/transmitter (TA11PA-C40) into a carotid artery. On test day, dogs are placed in sling restraints and an Abbocath-T i.v. catheter (18-G) is inserted into a cephalic vein for blood sampling and for the administration of agonist. Prostatic intraurethral pressure (IUP) is measured using a transurethral 7F Swan-Ganz balloon catheter (41224-01). Dose responses of the intraurethral and arterial pressor effects of 8, 16, and 32 μg/kg i.v. phenylephrine (PE) are obtained before and at various time points after a single p.o. dose of an antagonist. Fiduxosin is dissolved in a vehicle of 20% ethanol, 30% propylene glycol, and 50% water. Terazosin and tamsulosin are dissolved in water. All antagonists are given by gavage in a volume of 1 mL/kg. PE is dissolved in saline and administered in a volume of 0.1 mL/kg. The increase in IUP or mean arterial pressure (MAP) caused by PE is allowed to return to baseline before the next dose is administered. MCE尚未独立确认这些方法的准确性。 仅供参考。

提供质量检测报告：Data Sheet、产品使用指南

产品活性：Fiduxosin 是一种 α1-adrenoceptor 拮抗剂，对 α1a-adrenoceptor，α1b-adrenoceptor 和 α1d-adrenoceptor 的 Ki 值分别为 0.160 nM，24.9 nM 和 0.920 nM。

IC50 & Target：Ki: 0.16 nM (α1a-adrenoceptor), 24.9 nM (α1b- adrenoceptor), 0.92 nM (α1d-adrenoceptor), 92 nM (Human α2a-adrenoceptor), 22 nM (Human α2c-adrenoceptor), 21 nM (Rat α2b-adrenoceptor), 29 nM (Rat 5HT1A receptor)[1]

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客户发表文献：
[1]. Nature. 2026 Sep;657(8131):549-558.
[2]. Nature. 2026 Sep;657(8132):755-764.
[3]. Nature. 2026 Sep;657(8133):1027-1034.
[4]. Nature. 2026 Sep;657(8131):477-486.
[5].Nature. 2026 Sep;657(8132):789-799.
[6]. Nature. 2026 Sep;657(8131):517-524.
[7]. Nature. 2026 Sep;657(8133):1045-1052.
[8]. Cell. 2026 Sep 14:S0092-8674(26)01003-2.
[9]. Cell. 2026 Sep 3;189(18):5688-5705.e13.
[10]. Cell. 2026 Sep 2:S0092-8674(26)00937-2.

参考文献：
[1]. Hancock AA, et al. Preclinical pharmacology of fiduxosin, a novel alpha(1)-adrenoceptor antagonist with uroselective properties. J Pharmacol Exp Ther. 2002 Feb;300(2):478-86.
[2]. Brune ME, et al. Effect of fiduxosin, an antagonist selective for alpha(1A)- and alpha(1D)-adrenoceptors, on intraurethral and arterial pressure responses in conscious dogs. J Pharmacol Exp Ther. 2002 Feb;300(2):487-94.