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Abundant β-Defensin Copy Number Variations in Pigs
Dohun Kim1, Hye-Sun Cho1, Mingue Kang1
1Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul 05029, Republic of Korea.
Genes
|April 26, 2025
Summary
Pig beta-defensins (β-defensins) exhibit extensive copy number variations (CNVs) across breeds. These gene variations correlate with expression and may enhance host resilience against infections.
Area of Science:
- Genetics
- Immunology
- Animal Science
Background:
- Beta-defensins (β-defensins) are key antimicrobial peptides in innate immunity.
- These genes show significant copy number variations (CNVs), potentially serving as markers for host resilience.
Purpose of the Study:
- To quantify genomic copy numbers of pig beta-defensin (pBD) genes.
- To analyze the extent and range of CNVs in pBD genes across commercial pig breeds.
Main Methods:
- Developed a quantitative PCR (qPCR) method for estimating pBD gene copy numbers.
- Assessed CNVs in 13 pBD genes across 38 animals from four pure breeds and one crossbreed.
Main Results:
- Observed CNVs from two to five genomic copies for several pBD genes (pBD114, pBD115, pBD119, pBD124, pBD128, pBD129).
- Found breed-specific differences, with lower mean copy numbers in Landrace and higher in Berkshire.
- Demonstrated a strong positive correlation (r > 0.9) between copy number and kidney expression for pBD114, pBD119, and pBD129.
Conclusions:
- Confirmed extensive CNVs in pig beta-defensins, despite analyzing only a subset of known genes.
- Suggests that beta-defensin genomic copy number variation can influence animal resilience and other phenotypes.
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