YF476: Effects of a Single Dose at 3 Dose Levels on 24-hour Ambulatory Gastric pH Compared With Placebo and Ranitidine in Healthy Volunteers
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 入组人数
- 22
- 试验地点
- 2
- 主要终点
- Clinically relevant changes from baseline in safety assessments
研究概览
简要总结
The objectives of the study were:
- To compare a single dose of YF476 at 3 dose levels, placebo and ranitidine with respect to their effects on basal- and food- stimulated gastric pH in healthy volunteers.
- To assess whether there is a relationship between the pharmacokinetics of YF476 and gastric pH in healthy volunteers.
- To assess the safety and tolerability of single doses of YF476 in healthy volunteers.
详细描述
YF476 is clearly a potent and selective gastrin/CCK-B antagonist and should inhibit basal and meal-stimulated gastric acid secretion and enhance gastric emptying of a liquid meal in man. Therefore YF476 might benefit patients with reflux oesophagitis. The compound has been well tolerated in animal toxicity studies at doses in excess of the projected therapeutic dose in patients, and merits studies in healthy volunteers. Extrapolation from data obtained in animals suggests that a single oral dose of about 10mg of YF476 should compare favourably with an oral dose of 150mg of ranitidine in man with respect to effect on basal and food-stimulated gastric acid secretion. Therefore in the proposed study a range of doses of YF476 encompassing that dose will be studied; the exact dose of YF476 will be chosen on the basis of the previous study but the top dose will not exceed 100mg. 24-hour ambulatory gastric pH will be monitored via an intragastric pH electrode (7-10). Although there is variability between subjects with respect to the effects of food and drug treatment on gastric pH, the methodology for measurement of ambulatory gastric pH is robust.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Basic Science
- 盲法
- Double (Participant, Investigator)
入排标准
- 年龄范围
- 18 Years 至 45 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Male or female and aged 18-45 years.
- •No clinically relevant abnormal findings in the clinical history or physical examination at the screening assessment which could interfere with the objectives of the study or make the subject's participation hazardous.
- •No clinically relevant abnormal laboratory values at the screening evaluation (Attachment 2).
- •A normal ECG at the screening examination.
- •A body mass index (Quetelet index) in the range 19-30:
- •Body Mass Index = weight [kg]_ height [m]2
- •Normal blood pressure and heart rate at the screening examination, i.e. BP 90-150mmHg systolic, 40-95mmHg diastolic; heart rate 40-100 beats/min in seated position.
- •Subjects must be of sufficient intelligence to understand the nature of the study and any hazards of their participation in it. They must be able to communicate satisfactorily with the Investigator and to participate in, and comply with the requirements of, the entire study.
- •Subjects must give their written consent to participate after reading the Information-for-Volunteers Leaflet and Consent Form, and after having the opportunity to discuss the study with the Investigator or his deputy.
排除标准
- •Females who are pregnant or lactating, or who are sexually active and are not using a reliable method of contraception.
- •Clinically relevant abnormal history or physical findings at the screening assessment, which could interfere with the objectives of the study or the safety of the subject's participation.
- •Clinically relevant abnormalities of laboratory values or ECG at screening evaluation.
- •Presence of acute or chronic illness or history of chronic illness sufficient to invalidate subject's participation in the study or make it unnecessarily hazardous.
- •Impaired endocrine, thyroid, hepatic, respiratory or renal function, diabetes mellitus, coronary heart disease or history of any psychotic mental illness.
- •Participation in other clinical studies of a new chemical entity or a prescription medicine within the previous 3 months.
- •Presence or history of drug or alcohol abuse, or intake of more than 40 units of alcohol weekly.
- •Loss of more than 400mL blood during the 3 months before the study, e.g. as a blood donor.
- •Use of prescription medication during 30 days before the study.
- •Use of an over-the-counter medicine during 7 days before the study
- •Blood pressure or heart rate outside those values specified under inclusion criterion (f).
- •Possibility that the subject will not cooperate with the requirements of the protocol.
- •Evidence of drug abuse on urine testing at study entry.
- •Positive test for hepatitis B or C or HIV 1 &
- •High risk of hepatitis or HIV infection.
- •History of severe allergic disease.
结局指标
主要结局
Clinically relevant changes from baseline in safety assessments
时间窗: 6 weeks
Physical examination, ECG and safety tests of blood/urine at screening, 24h after dosing on each Treatment Day and at follow up. Blood pressure and heart rate before and at 0.5, 1, 2, 4, 6, 8, 12 and 24h after dosing on each Treatment Day.
Numbers of adverse events
时间窗: 6 weeks
Adverse events throughout the study
Pharmacokinetic parameters: Cmax, Tmax, AUC 0-24 h, T1/2
时间窗: 6 weeks
Blood samples (8mL) before and at 0.5, 1, 2, 4, 6, 8, 12 and 24h after each dose for assay of YF476.
Pharmacodynamic parameters: continuous 24 h ambulatory gastric pH
时间窗: 6 weeks
Recording starts 0.5h before dosing on each Treatment Day; meals taken at 4, 9, 13 \& 22h after dosing.
次要结局
未报告次要终点