Oral Polypeptide Bioavailability via Absorption Enhancers
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Solution Overview
Problem
The oral bioavailability of polypeptide drugs is limited due to degradation by proteolytic enzymes in the digestive tract and difficulty passing through the epithelial cell layer, leading to low absorption and high costs for administration.
Innovation Solution
A pharmaceutical composition combining a polypeptide drug, specifically compound A, with a specific absorption enhancer such as N-[8-(2-hydroxybenzoyl)amino]octanoic acid or 4-[(4-chloro-2-hydroxybenzoyl)amino]butyric acid, along with non-active ingredients to enhance permeability in the gastrointestinal tract.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If polypeptide drugs are administered orally, then patient compliance is improved, but oral bioavailability is low due to degradation by proteolytic enzymes and difficulty passing through the epithelial cell layer
Solution Approach 1:
The patent uses absorption enhancers as intermediary substances to facilitate the passage of polypeptide drugs through the gastrointestinal epithelial cell layer. These enhancers temporarily modify the intestinal membrane permeability, allowing the polypeptide to pass through while minimizing degradation, thus resolving the contradiction between oral administration convenience and low bioavailability.
Solution Approach 2:
The patent employs enteric coating technology to change the physical and chemical parameters of the polypeptide formulation. The enteric coating protects the polypeptide from gastric acid and proteolytic enzymes in the stomach, allowing it to remain stable until it reaches the intestines where absorption can occur, thereby improving oral bioavailability while maintaining the convenience of oral administration.
2Stability of the object's composition
If enteric coating technology is used to protect polypeptides from degradation, then stability is improved, but process complexity and cost increase
Solution Approach 1:
The patent develops a multi-functional formulation system where absorption enhancers serve multiple purposes: they enhance intestinal membrane permeability, provide some protective effect against degradation, and facilitate drug absorption. This multi-functionality reduces the need for complex enteric coating processes while still achieving adequate stability and bioavailability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly improves the oral bioavailability of compound A, simplifying the administration process and reducing costs, while maintaining therapeutic effectiveness.
Implementation Method 1
combining a polypeptide drug with a specific absorption enhancer and other non-active ingredients, thereby promoting the permeability of the polypeptide drug in the gastrointestinal tract
Data Source
AI summary
An oral pharmaceutical composition of a peptide amide compound (compound A). The present invention further relates to a method for preparing an oral pharmaceutical composition, and the use of the oral pharmaceutical composition in preparing a drug for treating diseases or conditions related to the x-opioid receptor.