alexa The proteins (12 and 15 kDa) isolated from heat-killed Lactobacillus plantarum L67 induces apoptosis in HT-29 cells.
Immunology

Immunology

Immunotherapy: Open Access

Author(s): Song S, Oh S, Lim KT

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A number of scientific studies have revealed that Lactobacillus strains have beneficial bioactivities in the gastrointestinal tract. In this study, the production of intracellular reactive oxygen species (ROS) and the amounts of intracellular calcium, protein kinase C activity, cytochrome c, Bid, Bcl-2, Bax and the apoptosis-mediated proteins [caspase-8, caspase-3 and poly ADP ribose polymerase (PARP)] were evaluated to understand the induction of programmed cell death in HT-29 cells by Lactobacillus plantarum L67. The results obtained from this study indicated that the relative intensities of the apoptotic-related factors (intracellular ROS and intracellular calcium) and of apoptotic signals (Bax and t-Bid) increased with increasing concentrations of the membrane proteins isolated from heat-killed L. plantarum L67, whereas the relative intensities of cytochrome c, Bcl-2, caspase-8, caspase-3 and PARP decreased. This study determines whether proteins (12 and 15 kDa) isolated from heat-killed L. plantarum L67 induce programmed cell death in HT-29 cells. Proteins isolated from L. plantarum L67 can stimulate the apoptotic signals and then consequently induce programmed cell death in HT-29 cells. The results in this study suggest that the proteins isolated from L. plantarum L67 could be used as an antitumoural agent in probiotics and as a component of supplements or health foods. This article was published in Cell BiochemFunct and referenced in Immunotherapy: Open Access

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