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Astressin

MCE 国际站：Astressin

品牌：MedChemExpress (MCE)

货号：HY-P0257

CAS 号：170809-51-5

生物活性：应激素是一种强效的促肾上腺皮质激素释放因子（CRF）拮抗剂。

体外研究(In Vitro)：Astressin has low affinity for the CRF binding protein and high affinity (Ki=2 nM) for the cloned pituitary receptor. Astressin shows high affinity for cloned human CRF-RA1 stably expressed in CHO cells and high potency to inhibit ACTH secretion[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)：Astressin is significantly more potent than any previously tested antagonist in reducing hypophyseal corticotropin (ACTH) secretion in stressed or adrenalectomized rats. Low doses of astressin (30 μg and 100 μg per kg) administered i.v. still produce a significant decrease in ACTH levels at 45 and 90 min, respectively[1]. Astressin significantly reverses the anxiogenic-like response induced by both social stress and ICV rat/humanCRF (r/hCRF) on the elevated plus-maze, but fails to block the effects of r/hCRF-induced locomotor activity in a familiar environment[2]. Intracerebroventricular infusion of the peptide both 30 min before and 10 min after seizures decreases damage in some hippocampal cell fields by as much as 84%, a magnitude of protection greater than reported for other CRF antagonists against other models of necrotic neuronal injury. Astressin protects even if administered only 10 min following excitotoxin exposure[3]. MCE尚未独立确认这些方法的准确性。 仅供参考。

分子量：3563.16

Formula：C161H269N49O42

性状：固体

颜色：White to off-white

Sequence Shortening：DPhe-HLLREVLE-Nle-ARAEQLAQ-cyclo(EAHK)-NRKL-Nle-EII-NH2

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：密封储存，避光防潮，氮气保护。粉末 -80°C 保存 2 年

Animal Administration [1]：Rats: Rat diet is supplemented with oranges, and their water contained 0.9% NaCl. They are equipped with indwelling jugular cannulae 48 h prior to the i.v. injection of either vehicle or astressin. Astressin is first diluted in sterile, distilled, apyrogenic water, and the pH is adjusted to 7.0. Further dilutions are made in 0.04 M phosphate buffer, pH 7.4, containing 0.1% bovine serum albumin and 0.01% ascorbic acid. Blood samples are obtained immediately before treatment, as well as 15-120 min later. Decanted plasma samples are frozen until assayed for ACTH concentrations[1]. MCE尚未独立确认这些方法的准确性。 仅供参考。

文献引用：MCE 顾客使用本产品发表 3 篇科研文献

提供质量检测报告：Data Sheet、SDS、COA、RP-HPLC、MS、元素分析报告、产品使用指南

产品活性：Astressin是有效的促肾上腺皮质激素释放因子 (CRF) 拮抗剂。

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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]. Gulyas J, et al. Potent, structurally constrained agonists and competitive antagonists of corticotropin-releasing factor. Proc Natl Acad Sci U S A. 1995 Nov 7;92(23):10575-9.
[2]. Spina MG, et al. Behavioral effects of central administration of the novel CRF antagonist astressin in rats. Neuropsychopharmacology. 2000 Mar;22(3):230-9.
[3]. Maecker H, et al. Astressin, a novel and potent CRF antagonist, is neuroprotective in the hippocampus when administered after a seizure. Brain Res. 1997 Jan 2;744(1):166-70.