Cellular Senescence, Mitochondrial Function, and Nutrient Sensing Pathways represent three cellular mechanisms examined within this section through laboratory research.
Research into Cellular Senescence
A state characterized by irreversible cell-cycle arrest is described by cellular senescence, often occurring as a response to cellular stressors including oxidative events or DNA alterations.
Secretion of various pro-inflammatory molecules—the Senescence-Associated Secretory Phenotype (SASP)—represents a key feature. Research employs:
- Compounds with senolytic properties: Selective targeting of senescent cells guides their design
- Modulators of SASP: Alteration of secretory profiles is their intended function
Studies of Mitochondrial Function
Central organelles for cellular energy production are mitochondria. Factors affecting their functional efficiency are examined by research.
Laboratory methodologies encompass:
- Caloric Restriction: Effects on oxidative stress markers are studied through this dietary intervention
- Physical Activity Protocols: In research models, mitochondrial biogenesis correlates with exercise
- Mitochondrial-Targeted Compounds: Oxidative processes are investigated using coenzyme Q10
- Mitochondrial-Derived Peptides: Homeostasis effects are studied for humanin and MOTS-c
Research on Nutrient Sensing Pathways
Cellular metabolism, growth, and repair are regulated by nutrient-sensing networks. Key pathways under investigation include:
- Insulin/IGF-1 Signaling (IIS): Pathway activation in laboratory models is examined by research
- mTOR Pathway: Various model organisms are used to study effects
- AMPK Pathway: Cellular energy homeostasis and autophagy are modulated
Studied interventions encompass:
- Caloric restriction protocols
- Pharmacological agents studied within laboratory settings
References:
- Lidzbarsky, G. A., et al. (2018). DNA damage response pathways. Biogerontology, 19(5), 337-356.
- López-Otín, C., et al. (2023). Cellular mechanisms. Cell, 186(2), 243-278.
