Changes in human pluripotent stem cell gene expression after genotoxic stress exposures

Area of Science:

• Stem Cell Biology
• Genotoxic Stress Response
• Human Pluripotent Stem Cells (hPSCs)

Background:

• Human pluripotent stem cells (hPSCs), including embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs), possess unique self-renewal and pluripotency capabilities.
• hPSCs hold significant promise for regenerative medicine, disease modeling, and drug/toxicity screening.
• Exposure to genotoxic stresses, such as ionizing radiation (IR), is unavoidable and relevant to medical procedures.

Purpose of the Study:

• To review existing evidence on gene expression alterations in hPSCs following genotoxic stress.
• To identify knowledge gaps in hPSC biology concerning their response to genotoxic insults.
• To discuss future research strategies for understanding hPSC fate after stress.

Main Methods:

• Literature review of studies investigating gene expression changes in hPSCs exposed to genotoxic agents.
• Analysis of data pertaining to the effects of ionizing radiation (IR) on hPSC gene expression.
• Synthesis of findings to highlight current understanding and limitations.

Main Results:

• Genotoxic stress, particularly IR, induces changes in gene expression patterns within hPSCs.
• These alterations in gene expression are a key cellular outcome following stress exposure.
• Current knowledge regarding the precise impact of these changes on hPSC fate remains incomplete.

Conclusions:

• Understanding gene expression changes in hPSCs after genotoxic stress is critical for their safe and effective application.
• Further research is needed to elucidate the mechanisms underlying hPSC responses to stress and their long-term consequences.
• Addressing knowledge gaps will facilitate the realization of hPSC therapeutic and research potential.