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Increased expression of the antiapoptotic protein MCL1 in canine mast cell tumors

Yosuke Amagai1, Akane Tanaka, Akira Matsuda

  • 1Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, Saiwai-cho, Fuchu, Tokyo 183-8509, Japan.

The Journal of Veterinary Medical Science
|February 23, 2013
PubMed

Insights

Myeloid cell leukemia sequence 1 (MCL1) protein promotes cancer cell survival and drug resistance. In dogs, MCL1 expression increases in mast cell tumors, potentially contributing to tumor progression and treatment challenges.

Area of Science:

  • Oncology
  • Molecular Biology
  • Veterinary Medicine

Background:

  • Myeloid cell leukemia sequence 1 (MCL1) is an antiapoptotic protein crucial for cell survival and drug resistance in cancers.
  • The role of MCL1 in canine mast cell tumors (MCTs) remains largely uninvestigated.

Purpose of the Study:

  • To investigate the expression and role of MCL1 in canine mast cell tumor (MCT) cell lines.
  • To determine the impact of signaling pathway inhibition on MCL1 expression in MCTs.

Main Methods:

  • Detection of MCL1 expression in canine MCT cell lines.
  • Assessment of MCL1 expression changes upon inhibition of specific signaling pathways (MAPK, JAK, KIT, PI3K).

Main Results:

  • MCL1 expression was elevated in canine MCT cell lines, irrespective of c-kit mutation status.
  • Inhibition of MAPK and JAK signaling pathways upregulated MCL1, enhancing cell survival against apoptosis.
  • Inhibition of KIT or PI3K signaling did not affect MCL1 expression.

Conclusions:

  • MCL1 plays a significant role in the survival of canine mast cell tumors.
  • MCL1 upregulation in response to certain pathway inhibitors may contribute to drug resistance in MCTs.
  • Targeting MCL1 could be a potential therapeutic strategy for canine MCTs.

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