Related Experiment Video
Updated: Jan 20, 2026
11:27
Preparation and In Vitro Characterization of Dendrimer-based Contrast Agents for Magnetic Resonance Imaging
Published on: December 4, 2016
10.5K
PEGylated Peptide-Based Imaging Agents for Targeted Molecular Imaging
1Medical Research Centre, Medical Faculty Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany. jiaguohuang@hotmail.com.
Current Protein & Peptide Science
|January 2, 2016
Summary
PEGylation enhances peptide-based imaging agents by improving tumor retention and clearance. This review covers PEGylated agents for molecular imaging, addressing challenges in their design and application.
Area of Science:
- Molecular imaging
- Bioconjugation chemistry
- Nanomedicine
Background:
- Peptide-based agents are crucial for molecular imaging, enabling visualization of cellular pathways.
- Challenges include rapid renal clearance, low tumor uptake, and potential toxicity from nanoparticle accumulation in the reticuloendothelial system (RES).
Purpose of the Study:
- To review PEGylated peptide-based imaging agents for molecular imaging and diagnosis.
- To discuss the effects of PEGylation on targeting, pharmacokinetics, and stability.
- To explore optimization strategies for peptide-based imaging agents.
Main Methods:
- Review of literature on PEGylated peptide imaging agents.
- Analysis of agents coupled with radioisotopes, fluorophores, and nanoparticles.
- Discussion of pharmacokinetic and pharmacodynamic properties.
Main Results:
- PEGylation improves tumor retention and pharmacokinetic profiles of peptide imaging agents.
- Modified agents demonstrate enhanced target capability and metabolic stability.
- PEGylation offers a successful strategy to overcome limitations of traditional peptide agents.
Conclusions:
- PEGylated peptide imaging agents represent a promising advancement in molecular imaging.
- Further optimization of design criteria is essential for clinical translation.
- PEGylation is key to developing safer and more effective diagnostic tools.
Related Concept Videos
01:19Imaging Studies VII: Vascular Imaging
318
DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
318
01:27Imaging Studies IV: Magnetic Resonance Imaging
227
Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
227
02:43Peptide Bonds
82.4K
A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
82.4K
01:24X-ray Imaging
9.9K
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
9.9K
01:14Brain Imaging
679
Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
679
02:00Molecular Models
43.6K
Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
43.6K