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Development of a metal/chelate polyhydroxyethylmethacrylate monolith capillary for selective depletion of immunoglobulin G from human plasma for proteomics
Khaparde A, M.A. V,
Published in Elsevier BV
PMID: 28859889
Volume: 1517
Pages: 117 - 125
In this study, we report the development of a new poly HEMA (HEMA-co-DEGDA-co-DATD) monolith capillary functionalized with “IDA-Cu (II) complex”. Of the two tested crosslinkers (methylene bisacrylamide (MBAAm) and diethylene glycol diacrylate (DEGDA)), presence of DEGDA has enhanced the monolith rigidity. Structural assembly of these monoliths are organized with highly interconnected large globule like structures and dominated by macropore region. Iminodiacetic acid (IDA) immobilization was performed using two chemical approaches (i. aldehyde − secondary amine reaction and ii. epoxy − sec. amine reaction). FT-IR analysis confirmed successful IDA immobilization in both cases. For the first time, a reaction of sec. amine ligand with aldehyde functional material was successfully reported. Overall, the Cu (II)-IDA monolith capillary showed good permeability (3.05 × 10 −13 m2), high IgG adsorption capacity and reusablilty even after 5 consecutive adsorption-desorption cycles. The amount of protein (IgG/HSA) adsorbed on Cu (II)-IDA monolith prepared via the two chemistries is almost similar. Using this affinity monolith capillary, we selectively depleted ∼95% of IgG from human plasma (dilution of 1:16). © 2017 Elsevier B.V.
About the journal
JournalData powered by TypesetJournal of Chromatography A
PublisherData powered by TypesetElsevier BV
Open AccessNo