TRAIL-expressing recombinant Lactococcus lactis induces apoptosis in human colon adenocarcinoma SW480 and HCT116 cells

Journal of Applied Microbiology
E BohlulS Nadri

Abstract

We investigated the ability of Lactococcus lactis, a species generally regarded as safe, to express tumour necrosis factor-related apoptosis-inducing ligand (TRAIL) protein. The expressed protein was either cell wall anchored or secreted, and it was assessed whether this could induce apoptosis in human colon adenocarcinoma cell lines SW480 and HCT116. Constructs were designed to produce either secreted or cell wall-anchored forms of human TRAIL cloned into pNZ7021 expression vector. The expression by L. lactis was confirmed by Western blotting and immunofluorescence. Induction of cell death was evaluated by coculturing transformants producing either form of TRAIL protein with the two cell lines followed by MTT assay. Gene expression of apoptosis genes, Bax and Bcl2, was assessed by qPCR. The viability of SW480 and HCT116 cells treated with recombinant L. lactis was significantly reduced. A significant change was observed in the ratio of Bax/Bcl2 expression in HCT116 cells only following treatment with the supernatant of recombinant L. lactis containing secreted TRAIL. Recombinant L. lactis producing TRAIL protein can induce apoptosis in human colon adenocarcinoma cell lines SW480 and HCT116. The use of recombinant probiotics th...Continue Reading

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Citations

Mar 17, 2020·Medicine·Vorraaud KunnavuttivanichSuthinee Ithimakin
Apr 7, 2021·Critical Reviews in Microbiology·Tejinder Pal Singh, Basavaprabhu Haranahalli Natraj
Jun 14, 2021·Seminars in Cancer Biology·Muhammad Jameel Mughal, Hang Fai Kwok

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