1. Expression of dihomo-γ-linolenic acid and FADS1/2 and ELOVL2/5 in term rabbit placentas.
- Author
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Kyogashima, M., Kamijima, K., Takai, N., Nakajima, T., Mikuma, T., Komamura, H., Asai, K., Ishihara, M., Sugiyama, E., and Tanaka, N.
- Abstract
• Levels of the minor FA DGLA are 2-fold higher than AA in term rabbit placentas. • In rabbit placentas, FADS2 and ELOVL5 are expressed at higher levels than in livers. • FADS1 and ELOVL2 are expressed at lower levels in rabbit placentas than in livers. • These gene expression changes may facilitate DGLA production and healthy pregnancies. Long-chain polyunsaturated fatty acids (LCPUFAs) are essential for both fetal and placental development. We characterized the FA composition and gene expression levels of FA-metabolizing enzymes in rabbit placentas. Total FA compositions from term rabbit placentas (n = 7), livers, and plasma (both n = 4) were examined: among LCPUFAs with more than three double bonds, dihomo-γ-linolenic acid (DGLA) was the most abundant (11.4 ± 0.69 %, mean ± SE), while arachidonic acid was the second-most rich component (6.90 ± 0.56 %). DGLA was barely detectable (<1 %) in livers and plasma from term rabbits, which was significantly lower than in placentas (both p < 0.0001). Compared with the liver, transcript levels of the LCPUFA-metabolizing enzymes FADS2 and ELOVL5 were 7- and 4.5-fold higher in placentas (both p < 0.05), but levels of FADS1 and ELOVL2 were significantly lower (both p < 0.01). Our results suggest a placenta-specific enzyme expression pattern and LCPUFA profile in term rabbits, which may support a healthy pregnancy. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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