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Caspase 3 blocking avoids the expression of autoantigens triggered by apoptosis in neonatal Balb/c mice skin

R Ramírez-Sandoval1, M Vazquez-del-Mercado, A Daneri-Navarro

  • 1Departamento de Immunología UBE y Area de Ciencias de la Salud, Universidad Autónoma de Zacatecas, 98600, Guadalupe, Zacatecas, México.

Reumatismo
|April 22, 2011
PubMed
Abstract

Insights

Caspase 3 inhibition reduces autoantigen expression during apoptosis. This study shows that inhibiting caspase 3 in skin explants decreases the expression of intracellular antigens associated with cell death.

Area of Science:

  • Cell Biology
  • Immunology
  • Dermatology

Background:

  • Apoptosis is a crucial process in skin homeostasis.
  • Dysregulation of apoptosis can lead to autoimmune diseases.
  • Intracellular antigens are often overexpressed during cell death.

Purpose of the Study:

  • To investigate the role of caspase 3 in apoptosis-induced autoantigen expression.
  • To determine if caspase 3 inhibition affects the expression of skin-associated autoantigens.

Main Methods:

  • Neonatal Balb/c mouse skin explants were cultured.
  • Apoptosis was induced using chemical agents and verified by TUNEL assay.
  • Expression of La, Ro, Sm, RNP, Cajal Bodies, and NuMa antigens was assessed via immunohistochemistry.

Main Results:

  • Chemical induction of cell death resulted in over 60% keratinocyte apoptosis/necrosis.
  • Significant upregulation of intracellular skin antigens, particularly La and Ro, was observed.
  • The caspase 3 inhibitor DEVD-CMK markedly reduced the expression of these induced antigens.

Conclusions:

  • Caspase 3 plays a significant role in the expression of autoantigens during apoptosis.
  • Inhibiting caspase 3 can modulate apoptosis and decrease cell death-associated autoantigens.
  • Targeting caspase 3 may offer a therapeutic strategy for autoimmune conditions involving autoantigen presentation.

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