Exploring the cytotoxic mechanisms of Pediocin PA-1 towards HeLa and HT29 cells by comparison to known bacteriocins : Microcin E492, enterocin heterodimer and Divercin V41

The purpose of this study was to explore potential mechanisms of cytotoxicity towards HeLa and HT29 cells displayed by Pediocin PA-1. We did this by carrying out sequence alignments and 3D modelling of related bacteriocins which have been studied in greater detail: Microcin E492, Enterocin AB heterodimer and Divercin V41. Microcin E492 interacts with Toll-Like Receptor 4 in order to activate an apoptosis reaction, sequence alignment showed a high homology between Pediocin PA-1 and Microcin E492 whereas 3D modelling showed Pediocin PA-1 interacting with TLR-4 in a way reminiscent of Microcin E492. Furthermore, Pediocin PA-1 had the highest homology with the Enterocin heterodimer, particularly chain A; Enterocin has also shown to cause an apoptotic response in cancer cells. Based on this we are led to strongly believe Pediocin PA-1 interacts with TLRs in order to cause cell death. If this is the case, it would explain the difference in cytotoxicity towards HeLa over HT29 cells, due to difference in expression of particular TLRs. Overall, we believe Pediocin PA-1 exhibits a dual effect which is dose dependant, like that of Microcin. Unfortunately, due to the COVID-19 pandemic, we were unable to carry out experiments in the lab, and the unavailability of important data meant we were unable to provide and validate out solid conclusions, but rather suggestions. However, bioinformatic analysis is still able to provide information regarding structure and sequence analysis to draw plausible and evidence based conclusions. We have been able to highlight interesting findings and how these could be translated into future research and therapeutics in order to improve the quality of treatment and life of cancer patients.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:16

Enthalten in:

PloS one - 16(2021), 9 vom: 03., Seite e0251951

Sprache:

Englisch

Beteiligte Personen:

Buss, George P [VerfasserIn]
Wilson, Cornelia M [VerfasserIn]

Links:

Volltext

Themen:

111745-56-3
1403-96-9
59678-46-5
Anti-Bacterial Agents
Bacteriocins
Bridged-Ring Compounds
Comparative Study
Divercin V41
Enterocin
Journal Article
Microcin
Pediocin PA-1
Pediocins
Toll-Like Receptor 4

Anmerkungen:

Date Completed 20.09.2021

Date Revised 20.09.2021

published: Electronic-eCollection

Citation Status MEDLINE

doi:

10.1371/journal.pone.0251951

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM330162071