SRX246
目录号 : GC38948
SRX246 是一种强效、中枢神经系统穿透性、高选择性、口服生物可利用的血管加压素 1a (V1a) 受体拮抗剂 (对人的 V1a 的 Ki=0.3 nM)。SRX246 在 V1b 和 V2 受体上没有相互作用，在64个其他受体类，包括 35 个 G 蛋白不偶联受体上也显示出可忽略的结合。SRX246 正在开发用于治疗应激相关疾病的药物。
Cas No.:512784-93-9
Sample solution is provided at 25 µL, 10mM.
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Quality Control & SDS
- View current batch:
- Purity: >98.50%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
SRX246 is a potent, CNS-penetrant, highly selective, orally bioavailable vasopressin 1a (V1a) receptor antagonist (Ki=0.3 nM for human V1a). SRX246 has no interaction at V1b and V2 receptors. SRX246 also displays negligible binding at 64 others receptors classes, including 35 G-proteincoupled receptors. SRX246 is under development for the treatment of stress-related disorders[1].
SRX246 (2 mg/kg; i.v.) treatment shows that the Cmax, AUC0-∞ and t1/2 values are 953 ng/mL, 1141 ng ?h/mL, and 6.02 hours, respectively, in plasma pharmacokinetics. Following an oral administration (dose 20 mg/kg), The Cmax, AUC0-∞ and t1/2 values are 98.4 ng/mL, 624 ng ?h/mL and 2.38 hours, respectively[1]. Animal Model: Male Sprague-Dawley rats[1]
[1]. Guillon CD, et al. Azetidinones as vasopressin V1a antagonists. Bioorg Med Chem. 2007 Mar 1;15(5):2054-80. [2]. Fabio KM, et al. Pharmacokinetics and metabolism of SRX246: a potent and selective vasopressin 1a antagonist. J Pharm Sci. 2013 Jun;102(6):2033-2043.
| Cas No. | 512784-93-9 | SDF | |
| Canonical SMILES | O=C(N1CCC(N2CCCCC2)CC1)C[C@H](C(N[C@@H](C3=CC=CC=C3)C)=O)N4[C@@H]([C@H](N5[C@@H](C6=CC=CC=C6)COC5=O)C4=O)/C=C/C7=CC=CC=C7 | ||
| 分子式 | C42H49N5O5 | 分子量 | 703.87 |
| 溶解度 | Soluble in DMSO | 储存条件 | Store at -20°C |
| General tips | 请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。 储备液的保存方式和期限：-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。 为了提高溶解度，请将管子加热至37℃，然后在超声波浴中震荡一段时间。 |
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| Shipping Condition | 评估样品解决方案：配备蓝冰进行发货。所有其他可用尺寸：配备RT，或根据请求配备蓝冰。 | ||
| 制备储备液 | |||
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1 mg | 5 mg | 10 mg |
| 1 mM | 1.4207 mL | 7.1036 mL | 14.2072 mL |
| 5 mM | 0.2841 mL | 1.4207 mL | 2.8414 mL |
| 10 mM | 0.1421 mL | 0.7104 mL | 1.4207 mL |
| 第一步：请输入基本实验信息（考虑到实验过程中的损耗，建议多配一只动物的药量） | ||||||||||
| 给药剂量 | mg/kg |  |
动物平均体重 | g | |
每只动物给药体积 | ul | |
动物数量 | 只 |
| 第二步：请输入动物体内配方组成（配方适用于不溶于水的药物；不同批次药物配方比例不同，请联系GLPBIO为您提供正确的澄清溶液配方） | ||||||||||
| % DMSO % % Tween 80 % saline | ||||||||||
| 计算重置 | ||||||||||
计算结果:
工作液浓度： mg/ml；
DMSO母液配制方法： mg 药物溶于 μL DMSO溶液（母液浓度 mg/mL，
体内配方配制方法：取 μL DMSO母液，加入 μL PEG300，混匀澄清后加入μL Tween 80，混匀澄清后加入 μL saline，混匀澄清。
1. 首先保证母液是澄清的；
2.
一定要按照顺序依次将溶剂加入，进行下一步操作之前必须保证上一步操作得到的是澄清的溶液，可采用涡旋、超声或水浴加热等物理方法助溶。
3. 以上所有助溶剂都可在 GlpBio 网站选购。
The Vasopressin 1a Receptor Antagonist SRX246 Reduces Aggressive Behavior in Huntington's Disease
J Pers Med 2022 Sep 22;12(10):1561.PMID:36294700DOI:10.3390/jpm12101561.
SRX246, an orally available CNS penetrant vasopressin (VP) V1a receptor antagonist, was studied in Huntington's disease (HD) patients with irritability and aggressive behavior in the exploratory phase 2 trial, Safety, Tolerability, and Activity of SRX246 in Irritable HD patients (STAIR). This was a dose-escalation study; subjects received final doses of 120 mg BID, 160 mg BID, or placebo. The compound was safe and well tolerated. In this paper, we summarize the results of exploratory analyses of measures of problematic behaviors, including the Cohen-Mansfield Agitation Inventory (CMAI), Aberrant Behavior Checklist (ABC), Problem Behaviors Assessment-short form (PBA-s), Irritability Scale (IS), Clinical Global Impression (CGI), HD Quality of Life (QoL), and Caregiver Burden questionnaires. In addition to these, we asked subjects and caregivers to record answers to short questions about mood, irritability, and aggressive conduct in an eDiary. STAIR was the first rigorously designed study of behavioral endpoints like these in HD. The exploratory analyses showed that SRX246 reduced aggressive acts. Readily observed behaviors should be used as trial endpoints.
Safety and Tolerability of SRX246, a Vasopressin 1a Antagonist, in Irritable Huntington's Disease Patients-A Randomized Phase 2 Clinical Trial
J Clin Med 2020 Nov 16;9(11):3682.PMID:33207828DOI:10.3390/jcm9113682.
SRX246 is a vasopressin (AVP) 1a receptor antagonist that crosses the blood-brain barrier. It reduced impulsive aggression, fear, depression and anxiety in animal models, blocked the actions of intranasal AVP on aggression/fear circuits in an experimental medicine fMRI study and demonstrated excellent safety in Phase 1 multiple-ascending dose clinical trials. The present study was a 3-arm, multicenter, randomized, placebo-controlled, double-blind, 12-week, dose escalation study of SRX246 in early symptomatic Huntington's disease (HD) patients with irritability. Our goal was to determine whether SRX246 was safe and well tolerated in these HD patients given its potential use for the treatment of problematic neuropsychiatric symptoms. Participants were randomized to receive placebo or to escalate to 120 mg twice daily or 160 mg twice daily doses of SRX246. Assessments included standard safety tests, the Unified Huntington's Disease Rating Scale (UHDRS), and exploratory measures of problem behaviors. The groups had comparable demographics, features of HD and baseline irritability. Eighty-two out of 106 subjects randomized completed the trial on their assigned dose of drug. One-sided exact-method confidence interval tests were used to reject the null hypothesis of inferior tolerability or safety for each dose group vs. placebo. Apathy and suicidality were not affected by SRX246. Most adverse events in the active arms were considered unlikely to be related to SRX246. The compound was safe and well tolerated in HD patients and can be moved forward as a candidate to treat irritability and aggression.
Pharmacokinetics and metabolism of SRX246: a potent and selective vasopressin 1a antagonist
J Pharm Sci 2013 Jun;102(6):2033-2043.PMID:23471831DOI:10.1002/jps.23495.
SRX246 is a potent, highly selective, orally bioavailable vasopressin 1a receptor antagonist that represents a novel mechanism of action for the treatment of mood disorders. The compound previously showed efficacy in animal models of mood disorders and excellent safety and tolerability in healthy volunteers in phase I clinical trials. In this study, SRX246 was further characterized in rats and dogs. In vitro determinations of permeability, protein binding, hepatocyte metabolism, and cytochrome P450 enzyme inhibition and in vivo assessments of pharmacokinetics were conducted. In parallel artificial membrane permeability assay (PAMPA) and PAMPA-blood-brain barrier models, SRX246 was comparable to highly permeable, orally active pharmaceuticals. SRX246 hydrochloride salt was 95.5 ± 1.7%, 95.9 ± 1.3%, and 98.6 ± 0.4% bound to rat, dog, and human serum proteins, respectively, and was stable in serum after a 4 h incubation at 37°C. P450 enzyme inhibition results showed a very low potential for drug-drug interactions. Metabolism in primary hepatocytes demonstrated that SRX246 was stable in humans and moderately metabolized in dogs and rats. Plasma pharmacokinetics findings showed a half-life (T½ ) of 2 and 6 h in rat and dog, respectively. Rat brain levels following a single oral dose were approximately 20% of plasma values with a T½ of 6 h. The observed profile for SRX246 supports further development.
The novel vasopressin receptor (V1aR) antagonist SRX246 reduces anxiety in an experimental model in humans: a randomized proof-of-concept study
Psychopharmacology (Berl) 2021 Sep;238(9):2393-2403.PMID:33970290DOI:10.1007/s00213-021-05861-4.
Rationale: Arginine vasopressin (AVP) is a neuropeptide that modulates both physiological and emotional responses to threat. Until recently, drugs that target vasopressin receptors (V1a) in the human central nervous system were unavailable. The development of a novel V1a receptor antagonist, SRX246, permits the experimental validation of vasopressin's role in the regulation of anxiety and fear in humans. Objectives: Here, we examined the effects of SRX246 in a proof-of-concept translational paradigm of fear (phasic response to imminent threat) and anxiety (prolonged response to potential threat). Methods: Healthy volunteers received both SRX246 and placebo in a randomized, double-blind, counter-balanced order separated by a 5-7-day wash-out period. Threat consisted of unpleasant electric shocks. The "NPU" threat test probed startle reactivity during predictable threat (i.e., fear-potentiated startle) and unpredictable threat (i.e., anxiety-potentiated startle). Results: As predicted, SRX246 decreased anxiety-potentiated startle independent of fear-potentiated startle. Conclusions: As anxiety-potentiated startle is elevated in anxiety and trauma-associated disorders and decreased by traditional anxiolytics such as SSRIs and benzodiazepines, the V1a receptor is a promising novel treatment target.
A novel V1a receptor antagonist blocks vasopressin-induced changes in the CNS response to emotional stimuli: an fMRI study
Front Syst Neurosci 2013 Dec 12;7:100.PMID:24376401DOI:10.3389/fnsys.2013.00100.
Background: We hypothesized that SRX246, a vasopressin V1a receptor antagonist, blocks the effect of intranasally administered vasopressin on brain processing of angry Ekman faces. An interaction of intranasal and oral drug was predicted in the amygdala. Methods: Twenty-nine healthy male subjects received a baseline fMRI scan while they viewed angry faces and then were randomized to receive oral SRX246 (120 mg PO twice a day) or placebo. After an average of 7 days of treatment, they were given an acute dose of intranasal vasopressin (40 IU) or placebo and underwent a second scan. The primary outcome was BOLD activity in the amygdala in response to angry faces. Secondary analyses were focused on ROIs in a brain regions previously linked to vasopressin signaling. Results: In subjects randomized to oral placebo-intranasal vasopressin, there was a significantly diminished amygdala BOLD response from the baseline to post-drug scan compared with oral placebo-intranasal placebo subjects. RM-ANOVA of the BOLD signal changes in the amygdala revealed a significant oral drug × intranasal drug × session interaction (F (1, 25) = 4.353, p < 0.05). Follow-up tests showed that antagonism of AVPR1a with SRX246 blocked the effect of intranasal vasopressin on the neural response to angry faces. Secondary analyses revealed that SRX246 treatment was associated with significantly attenuated BOLD responses to angry faces in the right temporoparietal junction, precuneus, anterior cingulate, and putamen. Exploratory analyses revealed that the interactive and main effects of intranasal vasopressin and SRX246 were not seen for happy or neutral faces, but were detected for aversive faces (fear + anger) and at a trend level for fear faces. Conclusion: We found confirmatory evidence that SRX246 has effects on the amygdala that counter the effects of intranasal vasopressin. These effects were strongest for angry faces, but may generalize to other emotions with an aversive quality.