Membrane Processes and Devices for Separation of Bioactive Peptides

Abstract

In recent years, functional foods and nutraceuticals has attracted much attention, particularly for their impact on human health and prevention of certain diseases. Consequently, the production and properties of bioactive peptides has received an increasing scientific interest over the past few years. Considering that most functional peptides are present in complex matrices containing a large number of hydrolyzed protein fractions, their separation and purification are required. Conventional pressure-driven processes can be used for amino acids and peptides separation but are limited by their fouling problems and their low selectivity when separating similar sized biomolecules. To improve the separation efficiency, an external electric field was applied during pressure-driven filtration. However, the pressure gradient brings about the accumulation of peptides at the nearby membrane surface and affects the membrane transport selectivity. Processes combining an electrical field as a driving force to porous membranes have been developed for the separation of biopeptides to obtain better purified products. Compounds of higher molecular weights than the membrane cut-off can be separated. The first trials were carried-out to perform the separation of amino acids and peptides with a filtration module specially designed and using one ultrafiltration membrane. More recently, electrodialysis with ultrafiltration membranes has been developed to fractionate simultaneously acidic and basic peptides, using a conventional electrodialysis cell, in which some ion exchange membranes are replaced by ultrafiltration ones. The perspectives in this field will be the understanding of the interactions of peptides and membrane as well as the development of new membrane materials limitating or increasing these interactions to improve the selectivity and the yield of production of specific peptides. This review article also discusses recent patents related to bioactive peptides.

Cheese whey: A potential resource to transform into bioprotein, functional/nutritional proteins and bioactive peptides

“…Finally, the bioactive peptides are separated or concentrated from hydrolysate product by membrane separation. The preferred methods of membrane separation for bioactive peptides are ultrafiltration and nanofiltration till date (Bazinet and Firdaous, 2009;.…”

Demonstration of in vitro anticancer properties of peptide fractions from a snow crab by-products hydrolysate after separation by electrodialysis with ultrafiltration membranes

“…Nevertheless, these methods present different drawbacks. For instance, the cost of separation is high in the case of chromatography [12] and it is applicable only to small volume [13]. In pressure-driven processes, the accumulation of particles on membrane leads to the formation of a fouling and to the modification of the membrane transport selectivity [14,15].…”

Advancements in the Fractionation of Milk Biopeptides by Means of Membrane Processes

“…In this sense, two different configurations can be distinguished: electrically-enhanced filtration, which can be used with conventional pressure driven membrane filtration, and forced-flow membrane electrophoresis, which is conducted in an electrophoretic cell. Intensive researches on these membrane processes have been carried out including electromembrane filtration (EMF) [94][95], electrodialysis with UF membranes (EDUF) [96][97][98][99] and forced-flow electrophoresis (FFE) [100] for the separation of charged bioactive molecules.…”

“…During this process the mass transport is affected by electrostatic interactions taking place at the membrane solution interface. The perspectives in the field of peptide fractionation will be the complete understanding of the interactions of peptides and membrane as well as the development of new membrane materials of gels limiting or increasing these interactions to improve the selectivity and the yield of production of specific peptides [100].…”