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Chemotactic Cues for NOTCH1-Dependent Leukemia.

Erich Piovan1,2, Valeria Tosello1, Alberto Amadori1,2

  • 1UOC Immunologia e Diagnostica Molecolare Oncologica, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy.

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Summary

NOTCH signaling regulates leukemia cell migration via chemokines in T-cell acute lymphoblastic leukemia (T-ALL) and B-cell chronic lymphocytic leukemia (B-CLL). This pathway impacts leukemic infiltration into organs like the CNS and gut.

Keywords:
CXC-chemokine receptor 4CXCR7NOTCHT-cell acute lymphoblastic leukemiachemokinesinfiltrationstromal-derived factor-1

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Area of Science:

  • Hematology
  • Molecular Biology
  • Cancer Research

Background:

  • The NOTCH signaling pathway is crucial for development and homeostasis.
  • Aberrant NOTCH signaling contributes to hematological malignancies, including T-cell acute lymphoblastic leukemia (T-ALL).
  • Non-mutational NOTCH1 activation is observed in B-cell chronic lymphocytic leukemia (B-CLL), highlighting its role in B-CLL pathogenesis.

Purpose of the Study:

  • To review the role of NOTCH signaling in regulating chemotactic cues in T-ALL.
  • To compare NOTCH signaling's role in T-ALL with its role in B-CLL.
  • To summarize recent findings on NOTCH-mediated leukemic cell infiltration.

Main Methods:

  • Literature review of studies on NOTCH signaling, chemokines, and leukemia.
  • Analysis of NOTCH1's role in regulating chemokine axes (e.g., CCL19/CCR7, CXCL12/CXCR4, CCL25/CCR9).
  • Comparison of NOTCH pathway involvement in T-ALL and B-CLL progression.

Main Results:

  • Oncogenic NOTCH1 regulates leukemic cell CNS infiltration via the CCL19/CCR7 axis.
  • The CXCL12/CXCR4 axis is vital for leukemia maintenance and progression.
  • The CCL25/CCR9 axis mediates gut homing, especially with PTEN loss.

Conclusions:

  • NOTCH signaling critically influences leukemic cell migration and organ infiltration through chemokine interactions.
  • Understanding these pathways offers insights into leukemia progression and potential therapeutic targets.
  • The review highlights conserved and distinct roles of NOTCH signaling in T-ALL and B-CLL microenvironments.