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Cloning and expression of rabbit interleukin-15
Changyun Xiong1, Patricia M Hixson, Leonardo H Mendoza
1National Cancer Institute-Frederick, National Institutes of Health, Frederick, MD, USA.
Veterinary Immunology and Immunopathology
|June 28, 2005
Summary
Researchers cloned and expressed rabbit interleukin-15 (RIL-15) to study its inflammatory functions. The recombinant RIL-15 protein demonstrated biological activity comparable to human IL-15, confirming its role in immune responses.
Area of Science:
- Immunology
- Molecular Biology
- Biochemistry
Background:
- Interleukin-15 (IL-15) is a critical cytokine in immune responses.
- Understanding species-specific IL-15 is vital for comparative immunology and disease research.
Purpose of the Study:
- To clone and express rabbit interleukin-15 (RIL-15) cDNA.
- To characterize the biological activity and tissue distribution of RIL-15.
Main Methods:
- Reverse transcriptase polymerase chain reaction (RT-PCR) for cDNA cloning.
- Recombinant protein expression in Escherichia coli and Western blotting.
- CTLL-2 cell proliferation assays to assess biological activity.
Main Results:
- RIL-15 cDNA was successfully cloned and expressed, yielding a protein of 12.5 kDa.
- RIL-15 shares significant sequence homology (82.7% amino acid, 87% nucleotide) with human IL-15.
- Expressed RIL-15 stimulated CTLL-2 cell proliferation, comparable to human IL-15.
- IL-15 expression was detected in multiple rabbit tissues, including heart, spleen, lung, liver, muscle, and kidney.
Conclusions:
- Rabbit IL-15 is a functional cytokine with biological activity similar to its human counterpart.
- RIL-15 is expressed across various rabbit tissues, suggesting broad immunological roles.
- This study provides a foundation for investigating RIL-15 in rabbit immune mechanisms and inflammatory diseases.