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Apoptosis induction by the stem cell factor LIN28A.

Yael Attali-Padael1, Leah Armon1, Achia Urbach1

  • 1The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel.

Biology of the Cell
|August 26, 2021
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Lin28A overexpression can induce apoptosis, a novel finding distinct from its known role in cell proliferation. This effect is specific to Lin28A and offers potential new cancer therapeutic strategies.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • Lin28A and Lin28B are RNA binding proteins crucial for stem and progenitor cell regulation.
  • Overexpression of Lin28 genes is typically linked to abnormal cell proliferation, transformation, and tumor formation.

Purpose of the Study:

  • To investigate the effects of Lin28A overexpression beyond its known role in cell proliferation.
  • To determine if Lin28A overexpression can induce apoptosis and elucidate the underlying mechanisms.

Main Methods:

  • In-vivo and in-vitro experiments were conducted.
  • Comparative analysis of Lin28A and Lin28B overexpression effects.
  • Investigation of Let-7 independent pathways involved in the observed effects.

Main Results:

  • Lin28A overexpression was found to induce apoptosis, contradicting previous findings.
  • This apoptotic effect is specific to Lin28A and not observed with Lin28B.
  • The mechanism is Let-7 independent and involves a complex interplay of multiple proteins.

Conclusions:

  • Lin28A's role in cell fate is context-dependent, with potential to induce apoptosis.
  • Understanding this Lin28A-mediated apoptosis could lead to novel therapeutic strategies for Lin28-expressing tumors.