Regulation of cell function and identity by cellular senescence

Area of Science:

• Cellular biology
• Aging research
• Pathophysiology

Background:

• Senescent cells accumulate during aging, development, wound healing, and in diseases like cancer.
• Historically, senescence was viewed as a loss of cell function due to proliferation arrest.
• The discovery of the senescence-associated secretory phenotype (SASP) shifted this understanding.

Purpose of the Study:

• To provide a historical overview of senescence research.
• To explore emerging trends in how senescence affects cell identity.
• To understand the dual role of senescence in health and disease.

Main Methods:

• Literature review of early senescence studies.
• Analysis of current research on senescence-associated gain-of-function effects.
• Examination of the impact of SASP and cell identity changes.

Main Results:

• Senescence is now recognized for its complex roles beyond proliferation arrest.
• The senescence-associated secretory phenotype (SASP) significantly influences the microenvironment.
• Senescence can establish, reinforce, or alter cell identity, with varied pathophysiological impacts.

Conclusions:

• Cellular senescence has multifaceted effects, including gain-of-function impacts on cell identity.
• Understanding these effects is crucial for addressing aging and related diseases.
• Further research is needed to fully define the mechanisms and consequences of senescence-induced cell identity changes.