Innate immune responses against viral pathogens in Macrobrachium

Area of Science:

• Crustacean immunology
• Aquaculture virology
• Invertebrate innate immunity

Background:

• Macrobrachium prawns are economically important and serve as models for crustacean innate immunity.
• Research has evolved from bacterial/fungal immunity to antiviral immunity in prawns over the last 20 years.
• Prawns face viral threats such as white spot syndrome virus, Macrobrachium rosenbergii nodavirus, and Decapod iridescent virus 1.

Purpose of the Study:

• To review the current understanding of antiviral host defense mechanisms in two Macrobrachium prawn species.
• To consolidate knowledge on how these prawns combat viral pathogens.

Main Methods:

• Literature review of existing studies on Macrobrachium antiviral immunity.
• Analysis of reported cellular and humoral immune responses against viruses.

Main Results:

• The primary antiviral defense in Macrobrachium involves activating intracellular signaling cascades.
• These cascades trigger cellular responses like apoptosis.
• Humoral responses include immune-related signaling pathways, antimicrobial/antiviral peptides, lectins, and the prophenoloxidase-activating system.

Conclusions:

• Macrobrachium prawns exhibit sophisticated antiviral defense systems.
• Intracellular signaling is central to activating both cellular and humoral antiviral immunity.
• Understanding these mechanisms is crucial for prawn aquaculture and disease management.