Related Experiment Video
Updated: Jan 15, 2026
06:26
Analyzing the Permeability of the Blood-Brain Barrier by Microbial Traversal through Microvascular Endothelial Cells
Published on: February 14, 2020
17.2K
Explaining blood-brain barrier permeability by synergistic effect on molecular substructures
Hyeok Jae Lee1, Ikhyeong Jun1, Hyun Woo Kim2
1Department of Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea.
Computers in Biology and Medicine
|October 14, 2025
Summary
This study introduces an explainable machine learning model to predict blood-brain barrier (BBB) permeability. The model identifies synergistic molecular substructures, aiding in the design of central nervous system (CNS) drug candidates.
Area of Science:
- Medicinal Chemistry
- Computational Chemistry
- Pharmacokinetics
Background:
- Blood-brain barrier (BBB) permeability is crucial for central nervous system (CNS) drug development.
- Understanding BBB permeability is complex due to multiple mechanisms and molecular substructures.
- Current models often lack interpretability, hindering rational drug design.
Purpose of the Study:
- To develop an explainable machine learning algorithm for predicting BBB permeability.
- To identify synergistic effects of molecular substructures on BBB permeability.
- To enable screening of drug candidates with desired CNS distribution properties.
Main Methods:
- Application of an explainable machine learning algorithm.
- Analysis of synergistic effects of molecular substructures.
- Relative importance analysis of substructures for property influence.
Main Results:
- Identification of synergistic molecular groups impacting BBB permeability.
- Ability to distinguish between positive and negative influences of substructures.
- Screening capability for molecules with specific BBB permeability profiles.
Conclusions:
- The proposed approach provides both predictive and explainable models for BBB permeability.
- Facilitates rational drug design by elucidating structure-permeability relationships.
- Applicable to various mechanisms influencing BBB permeability.
Related Concept Videos
00:49The Blood-brain Barrier
52.3K
Overview
52.3K
01:25Physiological Barriers
5.0K
Physiological barriers are semi-permeable cellular structures restricting drug diffusion into intracellular compartments and tissues. There are six types of physiological barriers: blood endothelial, cell membrane, blood-brain, blood-cerebrospinal fluid (CSF), blood-placenta, and blood-testis barriers.
The blood endothelial barrier is the most porous of these. It allows all small ionized, un-ionized, and lipophilic molecules to pass through the endothelial lining into the interstitial space...
The blood endothelial barrier is the most porous of these. It allows all small ionized, un-ionized, and lipophilic molecules to pass through the endothelial lining into the interstitial space...
5.0K
01:23Factors Affecting Drug Distribution: Physiological Barriers
684
Drug distribution in the body is intricately regulated by various physiological barriers that control the passage of substances. These include the capillary endothelial barrier, the blood-brain, blood-cerebrospinal fluid, blood-placental, and blood-testis barriers.
The capillary endothelial barrier allows only smaller molecules below 600 Da (Daltons) to pass through. It also restricts drugs like heparin that are bound to blood components, limiting their movement within the bloodstream.
The...
The capillary endothelial barrier allows only smaller molecules below 600 Da (Daltons) to pass through. It also restricts drugs like heparin that are bound to blood components, limiting their movement within the bloodstream.
The...
684
01:27Bioavailability Enhancement: Drug Permeability Enhancement
186
Body:After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt...
186
01:30Factors Affecting Drug Distribution: Tissue Permeability
605
The drug distribution process within the human body is a complex interplay of various physicochemical properties inherent to the drugs. These properties, including molecular size, ionization degree, partition coefficient, and stereochemical nature, significantly impact how drugs permeate biological membranes to reach their target tissues.
Small molecules with a molecular weight below 500 to 600 Daltons can easily pass through the capillary membrane, gaining access to different tissues. Larger...
Small molecules with a molecular weight below 500 to 600 Daltons can easily pass through the capillary membrane, gaining access to different tissues. Larger...
605
01:17Pore Transport and Ion-Pair Transport
1.1K
Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
1.1K