Lactic Acid Bacteria as Vectors: A Novel Approach for Mucosal Vaccine Delivery

Lactic Acid Bacteria (LAB) has been used in food industry due to its classification as food grade microorganism. It has been used for food production as well as preservation on large scale. It is also considered as promising bacterial strain due to its probiotic activity that confirms human health. Moreover, it also shows resistance regarding its survival in Gastrointestinal Tract (GIT). Therefore, use of LAB as delivery platform for drugs as well as production of recombinant protein is a challenging approach for researchers now a day. As, it not only reduces the production cost of drug, but also act as live vector to synthesize and deliver target or therapeutic protein of interest. Moreover, it is possible to produce different proteins from same bacteria simultaneously. Thus altogether, this approach has not only provided an alternative option for intravenous administration of recombinant protein but also gives an alternative insight for delivery system of mucosal vaccine. This review aims to provide an overview in order to use specific species of LAB such as lactococci lactis and Lactobacillus as vector for transfer of vaccine for mucosal as well as in recombinant form. Moreover, use of intron for desired genetic variation into target sites is explained to give directional insight for future studies.