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Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
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Author Spotlight: Magnetic Fluorescent Bead-Based Dual-Reporter Flow Analysis of PDL1-Vaxx Peptide Vaccine-Induced Antibody Blockade of the PD-1/PD-L1 Interaction
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p28 Bacterial Peptide, as an Anticancer Agent.

Atieh Yaghoubi1,2, Majid Khazaei3, Amir Avan4,5,6

  • 1Antimicrobial Resistance Research Center, Bu-Ali Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran.

Frontiers in Oncology
|August 28, 2020
PubMed
Summary

A novel bacterial peptide, p28, shows promise as an anticancer therapeutic. It targets solid tumors by stabilizing p53 and inhibiting new blood vessel formation, leading to tumor cell death.

Keywords:
azurin-p28bacterial peptidebacteriotherapycancerpseudomonas aeruginosa

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Oncology

Background:

  • Conventional chemotherapy faces limitations in cancer treatment, necessitating novel therapeutic strategies.
  • Bacterial proteins and peptides offer a promising avenue for developing new anticancer agents.
  • Azurin-derived peptide p28, an amphipathic α-helical peptide, demonstrates potential in treating solid tumors.

Purpose of the Study:

  • To review the current evidence on the anticancer potential of the bacterial peptide p28.
  • To elucidate the multi-target mechanisms of action of p28 in cancer therapy.

Main Methods:

  • Review of basic and clinical research on p28.
  • Analysis of p28's interaction with p53 and its effect on cellular processes.
  • Investigation of p28's impact on endothelial cell function.

Main Results:

  • p28 preferentially enters solid tumor cells and nascent endothelial cells.
  • p28 stabilizes wild-type and mutant p53 by inhibiting Cop1-mediated degradation, inducing cell-cycle arrest and apoptosis.
  • p28 inhibits endothelial cell migration and angiogenesis by decreasing FAK and Akt phosphorylation.

Conclusions:

  • p28 exhibits a dual mechanism of action against solid tumors: direct tumor cell killing and anti-angiogenesis.
  • The findings support p28's potential as a novel, multi-target anticancer therapeutic peptide for clinical application.