OBE022
(Synonyms: OBE022) 目录号 : GC32413
OBE022 (OBE022) 是一种口服选择性前列腺素 F2α； (PGF2α) 受体拮抗剂，对人和大鼠 FP 受体的 Kis 分别为 1 nM 和 26 nM。
Cas No.:2005486-31-5
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
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Animal experiment: |
Mice[1]Primigravid CD1 mice, on day 17 of pregnancy (about 85% gestation) at the beginning of the experiments, are used. Approximately 3 hours before induction of preterm labor (Day 1 (D1) at 10h00), the pregnant mice at gestational day 17, are placed in individual cages with food and water ad libitum. Pregnant mice receive on D1 (at day time: 13h00) a single subcutaneous (s.c.) injection of RU486 at a dose of 2.5 mg/kg in a final volume of 10 mL/kg of sesame oil. OBE022 (10, 30 and 100 mg/kg) or nifedipine (5 mg/kg) are administered orally (p.o.) at a volume of 5 mL/kg once on D1 (18h00), twice on D2 (8h00 and 18h00) and once on D3 (8h00) for a total of 4 administrations. For combination treatment, mice receive OBE022 plus nifedipine using the same experimental design as single treatment[1]. |
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References: [1]. Oliver Pohl, et al. OBE022, an oral and selective prostaglandin F2α receptor antagonist as an effective and safe modality for the treatment of preterm labor. J Pharmacol Exp Ther. 2018 Aug;366(2):349-364. |
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OBE022 is an oral and selective prostaglandin F2α (PGF2α) receptor antagonist, with Kis of 1 nM, 26 nM for human and rat FP receptors, respectively.
OBE022 and OBE002 are assayed for FP binding affinity by competitive binding analysis with 3H-PGF2α using HEK293 cells stably transfected with the FP receptor. Binding affinities (Ki) of OBE022 for the human and rat FP receptor are 1 nM and 26 nM respectively. For OBE002, Kis are 6 nM for the human and 313 nM for the rat FP receptor. The binding of both OBE022 and OBE002 is reversible and competitive since increasing concentrations of either compound causes successive decreases in the slope of the binding curves, consistent with an increase in equilibrium dissociation constant (KD) without a reduction in receptor density[1].
Time-course of the cumulative percentage of delivers mice after RU486-induced preterm parturition at GD17, in OBE022, nifedipine or vehicle treatment groups. Oral treatment with OBE022 delays the preterm birth caused by RU486 administration as reflected by a shift to the right of the percentage of delivery curve. The effect of oral treatment with nifedipine is comparable. Both OBE022 and nifedipine show a trend to increase the time of first pup delivery. As an important consequence of the prolongation of gestation, dams deliver viable pups. Combination of OBE022 and nifedipine cause a synergistic effect on the delay of RU486-induced preterm birth as reflected by a more pronounced shift to the right of the percentage of delivery curve, in comparison to OBE022 or nifedipine alone. Also, a larger increase of the time of first pup delivery is observed[1].
[1]. Oliver Pohl, et al. OBE022, an oral and selective prostaglandin F2α receptor antagonist as an effective and safe modality for the treatment of preterm labor. J Pharmacol Exp Ther. 2018 Aug;366(2):349-364.
| Cas No. | 2005486-31-5 | SDF | |
| 别名 | OBE022 | ||
| Canonical SMILES | O=C(N[C@H](C1=CC=C(F)C=C1)CCOC([C@H](C(C)C)N)=O)[C@H](SCC2)N2S(C(C=C3)=CC=C3C4=CC=CC=C4)(=O)=O | ||
| 分子式 | C30H34FN3O5S2 | 分子量 | 599.74 |
| 溶解度 | DMSO : 250 mg/mL | 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 | 1.6674 mL | 8.3369 mL | 16.6739 mL |
| 5 mM | 0.3335 mL | 1.6674 mL | 3.3348 mL |
| 10 mM | 0.1667 mL | 0.8337 mL | 1.6674 mL |
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| 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 |
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OBE022, an Oral and Selective Prostaglandin F2伪 Receptor Antagonist as an Effective and Safe Modality for the Treatment of Preterm Labor
J Pharmacol Exp Ther 2018 Aug;366(2):349-364.PMID:29777040DOI:10.1124/jpet.118.247668.
Preterm birth is the major challenge in obstetrics, affecting 鈭?0% of pregnancies. Pan-prostaglandin synthesis inhibitors [nonsteroidal anti-inflammatory drugs (NSAIDs)] prevent preterm labor and prolong pregnancy but raise concerns about fetal renal and cardiovascular safety. We conducted preclinical studies examining the tocolytic effect and fetal safety of the oral prodrug candidate OBE022 [(S)-2-amino-3-methyl-butyric acid (S)-3-{[(S)-3-(biphenyl-4-sulfonyl)-thiazolidine-2-carbonyl]-amino}-3-(4-fluoro-phenyl)-propyl ester] and its parent OBE002 [(S)-3-(biphenyl-4-sulfonyl)-thiazolidine-2-carboxylic acid [(S)-1-(4-fluoro-phenyl)-3-hydroxy-propyl]-amide], both potent and highly selective antagonist of the contractile prostaglandin F2伪 (PGF2伪 ) receptor (FP). Efficacy of OBE022 and OBE002, alone and in combination with other tocolytics, was assessed in human tissues and pregnant animal models for inhibition of uterine contraction and delay of parturition. Selective safety of OBE022 and/or OBE002, compared with NSAID indomethacin, was assessed on renal function, closure of the ductus arteriosus, and inhibition of platelet aggregation. In in vitro studies, OBE002 inhibited spontaneous, oxytocin- and PGF2伪 -induced human myometrial contractions alone and was more effective in combination with atosiban or nifedipine. In in vivo studies, OBE022 and OBE002 reduced spontaneous contractions in near-term pregnant rats. In pregnant mice, OBE022 delayed RU486 [(8S,11R,13S,14S,17S)-11-[4-(dimethylamino)phenyl]-17-hydroxy-13-methyl-17-prop-1-ynyl-1,2,6,7,8,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one] -induced parturition and exerted synergistic effects in combination with nifedipine. OBE022 and/or OBE002 did not show the fetal side effects of ductus arteriosus constriction, impairment of kidney function, or inhibition of platelet aggregation observed with indomethacin. Orally active OBE022 and OBE002 exhibits potent tocolytic effects on human tissues ex vivo and animal models in vivo without causing the adverse fetal side effects seen with indomethacin. Selectively targeting the FP receptor in combination with existing tocolytics may be an effective strategy for preventing or delaying preterm delivery.
Confirmation of the Cardiac Safety of PGF2伪 Receptor Antagonist OBE022 in a First-in-Human Study in Healthy Subjects, Using Intensive ECG Assessments
Clin Pharmacol Drug Dev 2018 Nov;7(8):889-900.PMID:29489066DOI:10.1002/cpdd.447.
OBE022, a new orally active prostaglandin F2伪 receptor antagonist (OBE022) with myometrial selectivity is being developed to reduce uterine contractions during preterm labor. This first-in-human study evaluated the effect of OBE022 following multiple doses on the QT interval in 23 healthy postmenopausal women, using the effect of a meal on QTc to demonstrate assay sensitivity. We report the cardiac safety outcome performed during the multiple ascending part of this trial. OBE022 was administered after a standardized breakfast on day 1 and in the fasted state from day 3 to day 9 wth a standardized lunch 4 hours after administration. Concentration-effect modeling was used to assess the effect of prodrug OBE022 and parent OBE002 on QTc after a single dose (days 1 and 3) and multiple doses (day 9). The concentration-response analysis showed the absence of QTc prolongation at all doses tested. Two-sided 90% confidence intervals of the geometric mean Cmax for estimated QTc effects of OBE022 and OBE002 of all dose groups were consistently below the threshold of regulatory concern. The sensitivity of this study to detect small changes in the QTc was confirmed by a significant shortening of the QTc on days 1, 3, and 9 after standardized meals. This study establishes that neither prodrug OBE022 nor parent OBE002 prolong the QTc interval. The observed food effect on the QT interval validated the assay on all assessment days. Both the change from predose, premeal and the change from premeal, postdose demonstrated the specificity of the method.
Pharmacokinetics, safety and tolerability of OBE022, a selective prostaglandin F2伪 receptor antagonist tocolytic: A first-in-human trial in healthy postmenopausal women
Br J Clin Pharmacol 2018 Aug;84(8):1839-1855.PMID:29708281DOI:10.1111/bcp.13622.
Aims: Preterm birth remains a significant risk for later disability. The selective inhibition of the prostaglandin F2伪 receptor has significant advantages for a tocolytic. The prodrug OBE022 and its metabolite OBE002 are novel prostaglandin F2伪 receptor antagonists under development for treating preterm labour. Methods: We performed a prospective, first in human, Phase I, dose escalation, placebo-controlled, randomized trial at a clinical trial site in the UK. Placebo, single ascending doses of 10, 30, 100, 300, 1000 or 1300 mg, and multiple ascending doses over 7 days of 100, 300 or 1000 mg day-1 ; were administered to postmenopausal female volunteers. Food interaction was additionally evaluated. Results: Subjects tolerated OBE022 well at all single and multiple doses. No clinically relevant changes in safety parameters were shown and there were no serious adverse events. Observations showed that prodrug OBE022 was readily absorbed and rapidly converted into its equally active stable metabolite OBE002. The plasma level of OBE002 rose with increasing doses, reaching exposure levels that were anticipated to be clinically relevant within 1 h following administration. There was no clinically significant food interaction, with peak exposures reduced to 80% and area under the curve staying bioequivalent. The mean half-life of OBE002 ranged between 8 and 11 h following administration of a single dose and 22-29 h after multiple doses. Conclusions: Administration of OBE022 was safe and had favourable pharmacokinetic characteristics and no clinically relevant interaction with food. Our results allow further investigation of OBE022 in preterm labour patients.
Coadministration of the prostaglandin F2伪 receptor antagonist preterm labour drug candidate OBE022 with magnesium sulfate, atosiban, nifedipine and betamethasone
Br J Clin Pharmacol 2019 Jul;85(7):1516-1527.PMID:30891820DOI:10.1111/bcp.13925.
Aims: To investigate presence or absence of clinically relevant drug interactions (pharmacokinetic and safety/tolerability) of OBE022 with standard-of-care medicines for preterm labour, enabling coadministration and further clinical development. Methods: Part A: open-label, randomized, 3-period crossover assessing coadministration of single doses of OBE022 (1100 mg) and MgSO4 . Part B: open-label, single-sequence crossover assessing the interactions following administration of OBE022 (1000 mg/day) at steady state coadministered with single doses of atosiban, nifedipine and betamethasone. Twenty-five healthy nonpregnant women of reproductive age were enrolled (Part A: n = 12; Part B: n = 13). Results: OBE022, alone or in combination with standard-of-care medications, was well tolerated. Headache and dizziness were the most frequently reported adverse events; dizziness occurred more often with the nifedipine/OBE022 combination. There were no clinically significant pharmacokinetic interactions when coadministered with MgSO4 . Co-administration had no notable effect on atosiban exposure. Atosiban reduced exposure to OBE002 (peak concentration [Cmax ] 22%, area under the concentration-time curve [AUC] 19%). Coadministration with betamethasone slightly increased betamethasone exposure (Cmax + 18%, AUC +27%) and OBE002 exposure (Cmax + 35%, AUC +15%). These changes were not considered clinically significant. Coadministration with nifedipine slightly increased OBE002 exposure (Cmax + 29%, AUC +24%) and markedly increased nifedipine exposure (Cmax by 2-fold and AUC by 2-fold), which may be clinically significant. Conclusions: The use of OBE022, a PGF2伪 antagonist prodrug, in combination with standard-of-care medicines may provide new treatment alternatives for preterm labour. All tested combinations were well tolerated. Nifedipine doses could potentially be reduced or staggered when coadministered with OBE022.
Efficient Design of Integrated and Adaptively Interlinked Protocols for Early-Phase Drug Development Programs
Ther Innov Regul Sci 2020 Jan;54(1):184-194.PMID:32008245DOI:10.1007/s43441-019-00044-y.
Background: Adaptive trial designs have the potential to address common challenges in drug development; they decrease timelines and costs of early drug development and efficiently create data that support future trials in target populations. While allowing for flexibility and evolution, adaptive strategies introduce some complexity to the design and implementation of trial protocols. Previously published work by the authors include a retrospective analysis of time savings using adaptive design and a systematic, 3- step methodology for writing early-phase adaptive integrated protocols. Methods: This article builds on the authors' published work demonstrating the practical implementation of the adaptive protocol writing methodology and discussing the challenges and efficiencies. It describes the integration of an early development program of OBE022, a novel, oral, selective prostaglandin F2a receptor antagonist, intended as a treatment for preterm labor, using 2 interdependent, adaptive trial protocols. The program consisted of first-in-human single and multiple ascending dose parts with assessments of food effect, cardiac safety, proof of concept, and interactions of OBE022 with 4 standard of care medicines. Results: The manuscript shows how the trials were tailored to OBE022's pharmacokinetic and pharmacodynamic characteristics and its therapeutic indication. The use of 2 large interdependent, adaptive protocols was facilitated by the United Kingdom's (UK's) regulatory environment and its acceptance of a rules-guided progression through the program. Changes to the planned trial conduct could be made without impacting on timelines, because they used predefined adaptive options within their authorized boundaries, and could therefore be made as nonsubstantial amendments. The program was successful and achieved its objectives. It was efficient and fast: it required a small number of participants (n=83) and completed from start of protocol writing to first draft of the clinical study report in just 11 months. Conclusions: This program included all key elements of early drug development in 2 interlinked protocols: the assessment of single and multiple ascending doses, food effect, cardiac safety and proof of concept. The approach described in this article demonstrates how early-phase programs can be designed to be performed, analyzed and reported time- and cost-efficiently.