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Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death
09:18

Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death

Published on: December 27, 2016

An interaction between type 1 and type 2 programmed cell death and clonogenic survival

K M Anderson1, P Bonomi, Y Hu

  • 1Department of Medicine, The University of Illinois and the West Side VA Hospital, Chicago, IL, USA. kanderso@rush.edu

Medical Hypotheses
|November 1, 2003
PubMed
Abstract

Insights

Type 2 programmed cell death (PCD) is less effective than type 1 PCD in eliminating cancer cells. Activating both types of PCD simultaneously increases residual cancer cells, hindering treatment efficacy.

Area of Science:

  • Oncology
  • Cell Biology
  • Cancer Therapeutics

Background:

  • Current non-surgical cancer therapies often show limited effectiveness against solid, epithelial-derived tumors.
  • Understanding the mechanisms of programmed cell death (PCD) is crucial for improving cancer treatment strategies.

Purpose of the Study:

  • To investigate the comparative effectiveness of two types of programmed cell death (PCD) in eliminating cancer cells.
  • To determine the impact of combined activation of different PCD pathways on residual cancer cell populations.

Main Methods:

  • Utilized panc-1 human pancreatic cancer cells for in vitro studies.
  • Treated cells with actinomycin D (inducing type 1 PCD) and/or MK 886 (inducing type 2 PCD).
  • Assessed the number of residual clonogenic cells following different treatment conditions.

Main Results:

  • Type 2 PCD (intrinsic, autophagic, mitochondrial-dependent, MK 886-induced) was less effective than type 1 PCD (apoptotic, extrinsic, ligand-dependent, actinomycin D-induced) in reducing clonogenic cells.
  • Simultaneous activation of both type 1 and type 2 PCD resulted in a higher number of residual clonogenic cells compared to individual treatments.

Conclusions:

  • Type 2 PCD is a less effective inhibitor of residual cells with clonogenic potential in this model system.
  • Combined activation of both type 1 and type 2 PCD pathways may paradoxically increase the number of residual cancer cells, potentially reducing therapeutic outcomes.

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