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Updated: Oct 2, 2025
Hydrogel Nanoparticle Harvesting of Plasma or Urine for Detecting Low Abundance Proteins
Published on: August 7, 2014
p(HEMA)-RR241 hydrogel membranes with micron network for IgG depletion in proteomic studies
Kevser Kuşat1, Selami Bağlamış2, Cansu İlke Kuru2
1Chemistry Department, Faculty of Science, Dokuz Eylül University, Izmir, Turkey.
Insights
Researchers developed novel hydrogel membranes to capture Immunoglobulin G (IgG), a key protein in serum diagnostics. This advancement aids in detecting diseases by improving proteomic analysis of essential serum biomarkers.
Area of Science:
- Biomaterials Science
- Proteomics
- Analytical Chemistry
Background:
- Serum proteins are vital biomarkers for diagnosing numerous diseases, including cancer and infections.
- High abundance proteins like albumin and Immunoglobulin G (IgG) dominate serum, complicating the analysis of low-abundance disease biomarkers.
- Efficient methods for selectively isolating specific proteins from complex biological samples like serum are crucial for advanced diagnostics.
Purpose of the Study:
- To develop and characterize novel dye ligand affinity-based hydrogel membranes for selective Immunoglobulin G (IgG) capture.
- To investigate the structural and hydrophilic properties of the synthesized hydrogel membranes.
- To optimize the conditions for IgG adsorption and evaluate the reusability of the developed material.
Main Methods:
- Micron mesh poly(2-hydroxyethyl methacrylate) (p(HEMA)) hydrogel membranes were synthesized using UV-photopolymerization.
- The hydrogel membranes were modified with Reactive Red 241 (RR241) dye ligand to enhance IgG affinity.
- Material characterization included dye incorporation quantification, swelling tests, and scanning electron microscopy (SEM/ESEM) for structural analysis.
- IgG adsorption studies were conducted under varying pH, temperature, and ionic strength conditions.
Main Results:
- The p(HEMA)-RR241 hydrogel membranes successfully incorporated 119.38 mg/g of RR241 dye.
- Dye modification significantly increased membrane hydrophilicity, with swelling values 8 times higher than plain membranes.
- SEM/ESEM confirmed the micron network structure and porosity of the membranes.
- Optimal IgG adsorption occurred at pH 6.5, 25°C, and 0.05 M ionic strength, achieving a maximum adsorption capacity of 10.27 mg/g.
- The hydrogel membranes demonstrated reusability over 5 adsorption-desorption cycles.
Conclusions:
- Novel micron mesh p(HEMA)-RR241 hydrogel membranes are effective for selective IgG capture from serum.
- The developed material exhibits favorable hydrophilic properties, structural integrity, and reusability.
- This affinity-based hydrogel membrane system shows potential for improving proteomic analysis and disease diagnostics through enhanced biomarker isolation.
Abstract:
Serum proteins can generally be considered a good source for the illness' indication and are precious resources to detect diseases such as inflammation, cancer, diabetes, malnutrition, cardiovascular diseases, Alzheimer's, other autoimmune diseases, and infections. However, one of the biggest difficulties for proteomic studies is that the majority of serum protein mass consists of only a few proteins. Albumin and Immunoglobulin (IgG) constitute 80% of total serum protein. In this study, dye ligand affinity-based hydrogel membranes were proposed as new materials with micron mesh structures. Micron mesh p(HEMA) hydrogel membranes were synthesized by using the UV-photopolymerization method, then modified with Reactive Red 241 (RR241) dye ligand to increase the affinity towards IgG. Characterizations of synthesized micron mesh p(HEMA)-RR241 hydrogel membranes were also performed. It was demonstrated by the characterization studies that; the dye was successfully incorporated into the membrane structure with the amount of 119.38 mg/g. The hydrophilic property of the hydrogel membrane was demonstrated by swelling tests and the swelling value of dye modified membrane was found to be 8 times higher than that of the plain membrane. Micron network structure, as well as the porosity, were demonstrated with SEM/ESEM studies. Optimization of IgG adsorption conditions was also studied at different parameters (pH, temperature, ion strength, initial IgG concentration). Optimum pH, temperature, and ionic strength were found to be 6.5, 25 °C, 0.05 M, respectively, and the maximum IgG absorption value was 10.27 mg/g. Finally, it was shown that the proposed materials can be used repeatedly by 5 adsorption-desorption cycles.
