Abstract
Breed-specific differences in fat tissue accumulation in the pig provide an opportunity to study the genetic background of this process. In the present study three pig breeds, differing in fatness, were analyzed in terms of the size of adipocytes derived from three tissues (subcutaneous, visceral and longissimus dorsi muscle) in relation to transcript levels of genes (SNAP23, BSCL2 and COPA), which encode proteins involved in lipid droplet formation. The analysis of adipocyte size revealed significant effects of breed and tissue and confirmed earlier reports that an elevated backfat thickness in some pig breeds is correlated with a larger adipocyte size. Variability in the transcript abundance of the studied genes among breeds and tissues was observed. We found a positive correlation between the abundance of the SNAP23 transcript and adipocyte diameter. The obtained results indicate that SNAP23 may be considered as an interesting candidate gene involved in adipose tissue growth in the pig.
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