Development of a hyena immunology toolbox

Area of Science:

• Immunology
• Zoology
• Comparative Medicine

Background:

• Scavenging animals, like spotted hyenas (Crocuta crocuta), face significant pathogen exposure.
• Hyenas exhibit remarkable resistance to diseases that affect other carnivores, suggesting unique immune adaptations.
• Understanding hyena immune function is crucial for studying their resilience and evolutionary adaptations.

Purpose of the Study:

• To identify and validate tools for studying spotted hyena immune function.
• To document the hyena antibody response to immunization.
• To investigate potential cross-reactivity of antibodies between spotted hyenas and domestic cats (Felis catus).

Main Methods:

• Utilized enzyme-linked immunosorbent assay (ELISA) and Western blots to test cross-reactivity of anti-feline antibodies with hyena immunoglobulin epitopes.
• Determined molecular weights of hyena immunoglobulin heavy (IgA, IgG, IgM) and light chains via protein electrophoresis.
• Immunized eight spotted hyenas with dinitrophenol conjugated keyhole limpet hemocyanin (DNP-KLH) and monitored serum anti-DNP responses by ELISA for one year.

Main Results:

• Isotype-specific anti-feline antibodies demonstrated cross-reactivity with spotted hyena immunoglobulin epitopes.
• Molecular weights of hyena immunoglobulins were similar to those of feline immunoglobulins.
• The study successfully documented the hyena humoral immune response to DNP-KLH immunization over a year.

Conclusions:

• Developed and validated a suite of tools for studying hyena antibody responses.
• Established cross-reactivity between anti-feline and hyena immunoglobulins, facilitating future research.
• The identified antibody tools will enable further investigation into hyena pathogen exposure and immune function.