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[CASC5 Gene Expression Changes Correlate with Targeted Mutations in Leukemia].

K V Bogdanov1,2, O V Merzlikina1, Y V Mirolyubova1

  • 1Research Institute of Oncology and Hematology, Almazov National Medical Research Center, St. Petersburg, 197341 Russia.

Molekuliarnaia Biologiia
|February 10, 2021
PubMed
Summary

Reduced expression of the CASC5 gene is observed in leukemia patients, correlating with poor prognosis and chemotherapy resistance. This finding highlights CASC5

Keywords:
A3ACASC5N-MYCWT1expressionleukemiamutationsoncogenesregulation

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Area of Science:

  • Cell Biology
  • Molecular Oncology
  • Hematology

Background:

  • Aneuploidy, common in leukemia, arises from errors in mitosis and chromosome segregation.
  • The AF15q14/KNL1/CASC5 protein is crucial for kinetochore-microtubule binding during cell division.
  • The MLL-AF15Q14 oncogene, involving CASC5, is a poor prognostic biomarker in certain leukemias.

Purpose of the Study:

  • To investigate the expression of the CASC5 gene in hematopoietic neoplasms.
  • To analyze the correlation between CASC5 expression and leukemia prognosis.
  • To explore the relationship between CASC5 expression and other regulatory genes in leukemia.

Main Methods:

  • Analysis of CASC5 gene expression in bone marrow cells from leukemia patients and healthy donors.
  • Correlation analysis of CASC5 expression with targeted mutations and prognostic subgroups.
  • Examination of expression levels of WT1, APOBEC3A (A3A), and N-MYC in relation to CASC5 expression.

Main Results:

  • A significant decrease in CASC5 gene expression was found in leukemia patients compared to healthy individuals.
  • Reduced CASC5 expression correlated with specific mutations and predicted unfavorable prognostic subgroups (p <0.05).
  • In acute myeloid leukemia, decreased CASC5 expression was associated with overexpression of WT1, A3A, and sometimes N-MYC and SPT16, suggesting chemotherapy resistance.

Conclusions:

  • CASC5 gene expression is significantly downregulated in leukemia.
  • CASC5 downregulation is a potential biomarker for poor prognosis and may indicate resistance to chemotherapy.
  • The interplay between CASC5 and other regulatory genes in leukemogenesis requires further investigation.