Calcium homeostasis in trypanosomatids: A review of molecular targets and inhibitors

Area of Science:

• Parasitology
• Molecular Biology
• Biochemistry

Background:

• Calcium ion (Ca²⁺) signaling is essential for critical cellular functions in trypanosomatids, including survival, differentiation, and virulence.
• Trypanosomatids, such as Leishmania spp., Trypanosoma brucei, and Trypanosoma cruzi, rely heavily on precise Ca²⁺ regulation.
• Dysregulation of Ca²⁺ homeostasis presents a vulnerability that can be exploited for therapeutic intervention.

Purpose of the Study:

• To review and integrate current knowledge on Ca²⁺ homeostasis in trypanosomatids.
• To highlight key Ca²⁺ transporters, signaling pathways, and organelle-specific regulation.
• To summarize strategies for targeting Ca²⁺ homeostasis and discuss novel therapeutic compounds.

Main Methods:

• Literature review integrating existing research on Ca²⁺ signaling in trypanosomatids.
• Analysis of Ca²⁺ transport mechanisms across various organelles (plasma membrane, ER, acidocalcisomes, mitochondria, lysosomes).
• Summary of genetic and pharmacological approaches for target validation and drug discovery.

Main Results:

• Ca²⁺ signaling is integral to trypanosomatid survival, differentiation, and virulence.
• Multiple organelles, including the plasma membrane, ER, acidocalcisomes, mitochondria, and lysosomes, contribute to Ca²⁺ homeostasis.
• Key transporters and signaling pathways involved in Ca²⁺ regulation have been identified.
• Genetic and pharmacological tools effectively validate Ca²⁺-related targets.
• Repurposed and novel compounds show potential in disrupting trypanosomatid Ca²⁺ homeostasis.

Conclusions:

• Ca²⁺ homeostasis is a critical and druggable vulnerability in trypanosomatids.
• Understanding organelle-specific Ca²⁺ dynamics is key to developing effective therapies.
• Targeting Ca²⁺ signaling pathways offers a promising avenue for novel anti-parasitic drug development.