Yeast as a tool to explore cathepsin D function

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Biology

Background:

• Cathepsin D is increasingly recognized for its association with various human pathologies.
• Overexpression and hypersecretion of Cathepsin D in cancer cells suggest its potential as a therapeutic target.
• Cathepsin D exhibits context-dependent anti- and pro-survival functions, necessitating a deeper understanding of its regulation.

Purpose of the Study:

• To review the physiological and pathological roles of Cathepsin D.
• To elucidate the opposing functions of Cathepsin D in apoptosis, with a focus on cancer research.
• To explore how yeast Cathepsin D (Pep4p) insights can inform mammalian Cathepsin D research.

Main Methods:

• Literature review of Cathepsin D's role in physiological and pathological conditions.
• Analysis of Cathepsin D's dual functions in apoptosis and cell death pathways.
• Comparative study of mammalian Cathepsin D and its yeast homolog, Pep4p.

Main Results:

• Cathepsin D plays a significant role in both normal physiological processes and various human diseases.
• The protein demonstrates complex, often opposing, effects on apoptosis, acting as both a pro- and anti-survival factor.
• The yeast vacuolar protease Pep4p, a functional counterpart to Cathepsin D, influences cell life and death, offering comparative insights.

Conclusions:

• A comprehensive understanding of Cathepsin D's regulatory mechanisms and its modulation of apoptotic functions is crucial.
• Insights from yeast Cathepsin D research can potentially uncover novel functions of mammalian Cathepsin D in apoptosis.
• Further investigation into Cathepsin D is warranted for its therapeutic potential in cancer and other pathologies.