相关实验视频
Updated: Jan 29, 2026

12:15
Generation of Monoclonal Antibodies Against Natural Products
Published on: April 6, 2019
11.6K
单克隆抗体的口服生物可用性
Ashwni Verma1, Shengjia Wu1, Dhaval K Shah1
1Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, Buffalo, NY 14214, USA.
Pharmaceutics
|January 28, 2026
概括
在动物中,单克隆抗体 (mAbs) 的口服生物利用率约为0.02%. 这项临床前研究为mAb提供了第一个绝对的口服生物可用性值,表明口服后系统吸收非常低.
科学领域:
- 药理动力学 药理动力学
- 药物运输 药物运输 药物运输
- 生物技术是生物技术.
背景情况:
- 单克隆抗体 (mAbs) 的口服输送具有显著的兴趣.
- 在此之前,mAbs的口服生物可用性尚未确定.
- 一项临床前研究旨在解决这一知识差距.
研究的目的:
- 在临床前模型中确定单克隆抗体 (mAb) 的绝对口服生物可用性.
- 为了研究口服mAbs.的药理动力学.
- 为了建立口服mAb吸收的基线.
主要方法:
- 一种人性化的mAb (trastuzumab) 被口服给小鼠和老鼠,剂量为100mg/kg.
- 血药理动力学 (PK) 在14天内进行测量.
- 使用非分区分析 (NCA) 和分区建模来估计口服生物可用性.
主要成果:
- 在老鼠中,mAb的口服生物利用率为0.027% (NCA) 和0.025% (建模).
- 在小鼠中,mAb的口服生物利用率为0.014% (NCA) 和0.013% (建模).
- 从胃肠道吸收率在物种之间是一致的 (0.78 h-1).
结论:
- 在动物中,人性化mAbs的口服生物利用率约为0.02%.
- 这表明,每5000个口服的mAb分子中,只有1个达到全身循环.
- 这是第一个报告mAb绝对口服生物可用性的研究,需要进一步的研究来概括.
相关概念视频
Bioavailability: Overview
409
Bioavailability refers to the proportion of an administered drug that reaches the systemic circulation in its active, unaltered form. It is a crucial pharmacokinetic parameter that determines the effectiveness of a drug in achieving its intended therapeutic outcomes. The route of administration significantly influences bioavailability, with intravenous administration achieving 100% bioavailability as the drug directly enters the bloodstream. In contrast, oral administration often results in...
409
Bioavailability: Overview
4.4K
Bioavailability refers to the proportion of an unaltered drug that, after administration, enters the systemic circulation and can be distributed to the desired action site. Factors such as gastrointestinal (GI) absorption and liver biotransformation influence the bioavailability of a drug when it is administered orally. When a drug is administered intravenously, it enters the systemic circulation directly; by definition, its bioavailability is assumed to be 100%. The bioavailability of an...
4.4K
Bioavailability Study Design: Absolute Versus Relative Bioavailability
331
Bioavailability is a crucial pharmacokinetic parameter that quantifies the proportion of an administered drug that reaches the systemic circulation and is available for therapeutic action. Regulatory agencies mandate the assessment of bioavailability, typically measured as the area under the drug plasma concentration-versus-time curve (AUC), to ensure the efficacy and safety of pharmaceutical products. These evaluations are categorized as absolute and relative bioavailability studies.Absolute...
331
Bioavailability Enhancement: Determination and Conceptual Approaches in Overcoming Bioavailability Problems
208
Body:Bioavailability is a critical pharmacological concept that measures the extent and rate at which an active drug ingredient or therapeutic moiety enters the systemic circulation, remaining unchanged. It's a pivotal factor in determining a drug's efficacy and safety.The Biopharmaceutics Classification System (BCS) plays an essential role in drug development by categorizing drugs into four classes based on their solubility and permeability. This classification aids in understanding drug...
208
Bioavailability: Influencing Factors
366
Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...
366
Oral Cavity
3.1K
The oral cavity, or the mouth, is a complex structure in humans that plays a vital role in our day-to-day lives. Its role is not only in chewing and swallowing food; it also plays a role in speech and facial expressions.
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...
3.1K

