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Published on: March 5, 2018

Expression of the pro-apoptotic caspase 3/CPP32 in cutaneous basal and squamous cell carcinomas

F Cousin1, S Baldassini, D Bourchany

  • 1Department of Dermatology, Ed. Herriot Hospital, Lyon, France.

Journal of Cutaneous Pathology
|June 10, 2000
PubMed

Insights

This study investigated caspase 3 (CPP32) in skin tumors. CPP32 was found in normal skin and both basal and squamous cell carcinomas, suggesting its role in skin homeostasis.

Area of Science:

  • Molecular Biology
  • Dermatology
  • Cancer Research

Background:

  • Apoptosis, or programmed cell death, is crucial for tissue homeostasis.
  • Caspases, particularly caspase 3 (CPP32), are key regulators of apoptosis.
  • The role of CPP32 in skin tumors remains largely unexplored.

Purpose of the Study:

  • To investigate the expression and potential role of CPP32 in normal human skin and common skin cancers.
  • To analyze CPP32 expression at both protein and mRNA levels in basal cell carcinoma (BCC) and squamous cell carcinoma (SCC).

Main Methods:

  • Immunohistochemistry to visualize CPP32 protein.
  • Western blot analysis for protein expression quantification.
  • Reverse transcriptase-polymerase chain reaction (RT-PCR) for mRNA expression analysis.

Main Results:

  • CPP32 was detected in epidermal and adnexal keratinocytes of normal skin.
  • CPP32 expression was observed in both squamous cell carcinomas and, to a lesser extent, basal cell carcinomas.
  • No correlation was found between CPP32 expression levels and tumor invasion depth.
  • Occasional CPP32 expression was noted in tumor-infiltrating lymphocytes and peritumor endothelial cells.

Conclusions:

  • The presence of CPP32 in normal skin and skin tumors suggests its involvement in their homeostasis.
  • Further research is needed to elucidate the precise functional significance of CPP32 in skin carcinogenesis and homeostasis.

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