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Updated: Jul 14, 2026
Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery
Published on: April 17, 2012
Clinical significance of protein adsorbable membranes--long-term clinical effects and analysis using a proteomic
1Internal Medicine, Shinrakuen Hospital, Niigata, Japan. aoike190@ecatv.home.ne.jp
Abstract:
Polymethylmethacrylate (PMMA) membranes were first developed in Japan in 1977. Over its 30-year history, use of PMMA has given rise to a new generation of dialysers and continues to evolve. In long-term observation of patients treated with PMMA membranes (BK series), it has been found that serum beta2-microglobulin is maintained at a significantly lower level than in haemodialysis (HD) patients undergoing treatment with conventional cellulosic membranes. Regarding long-term side effects, radiolucent bone cysts (RBC) and carpal tunnel syndrome (CTS) have developed in relatively few patients undergoing HD with PMMA membranes. The profiles of various proteins in the blood of HD patients differ from those in normal subjects. PMMA membranes remove a wide variety of solutes not only via permeation, but also adsorption. Numerous reports have noted that pruritus can be ameliorated with the use of slightly anionic PMMA membranes (BG series). We have been performing proteomic analysis of plasma from HD patients with pruritus. We have confirmed that slightly anionic PMMA membranes can adsorb components with a molecular weight of 160,000 Da, which have stimulatory effect on mast cells from pruritus.
Insights
Polymethylmethacrylate (PMMA) membranes effectively reduce beta2-microglobulin levels in hemodialysis patients. Anionic PMMA membranes also adsorb mast cell stimulators, alleviating pruritus in patients undergoing hemodialysis.
Area of Science:
- Biomaterials Science
- Nephrology
- Membrane Technology
Background:
- Polymethylmethacrylate (PMMA) membranes, developed in 1977, represent an evolution in hemodialysis technology.
- Long-term use of PMMA membranes has shown distinct clinical outcomes compared to conventional cellulosic membranes.
Purpose of the Study:
- To evaluate the efficacy of PMMA membranes in managing serum beta2-microglobulin levels.
- To investigate the mechanisms behind pruritus amelioration using anionic PMMA membranes in hemodialysis patients.
Main Methods:
- Long-term patient observation and analysis of serum beta2-microglobulin levels.
- Proteomic analysis of plasma from hemodialysis patients with pruritus.
- Assessment of solute removal via permeation and adsorption by PMMA membranes.
Main Results:
- PMMA membranes significantly lower serum beta2-microglobulin compared to cellulosic membranes.
- Anionic PMMA membranes demonstrate adsorption of specific high molecular weight proteins (160,000 Da) linked to pruritus.
- Low incidence of radiolucent bone cysts and carpal tunnel syndrome observed with PMMA membrane use.
Conclusions:
- PMMA membranes offer improved solute removal, including beta2-microglobulin, and reduced long-term side effects in hemodialysis.
- Anionic PMMA membranes show potential for managing pruritus by adsorbing mast cell-stimulating proteins.
