title: [Reconstitution of polyunsaturated fatty acid synthesis enzymes in mammalian cells to convert LA to DHA].
abstract: DHA (22:6n-3) is a Ω-3 polyunsaturated fatty acid with 22 carbon atoms and 6 double bonds, which has important biological functions in human body. Human and other mammals synthesize only limited amounts of DHA, more requirements must be satisfied from food resources. However, the natural resources of DHA (Mainly deep-sea fish and other marine products) are prone to depletion. New resources development is still insufficient to satisfy the growing market demand. Previous studies have revealed that the mammals can increase the synthesis of DHA and other long-chain polyunsaturated fatty acids after transgenic procedures. In this study, mammalian cells were transfected with Δ6, Δ5 desaturase, Δ6, Δ5 elongase, Δ15 desaturase (Isolated from nematode Caenorhabditis elegans) and Δ4 desaturase (Isolated from Euglena gracilis), simultaneously. Results show that the expression or overexpression of these 6 enzymes is capable of conversion of the o-6 linoleic acid (LA, 18:2n-6) in DHA (22:6n-3). DHA content has increased from 16.74% in the control group to 25.3% in the experimental group. The strategy and related technology in our research provided important data for future production the valuable DHA (22:6n-3) by using genetically modified animals.
authors.forename: Guiming
authors.initials: G
authors.lastname: Zhu
authors.forename: Abdulmomen Ali Mohammed
authors.initials: AA
authors.lastname: Saleh
authors.forename: Said Ahmed
authors.initials: SA
authors.lastname: Bahwal
authors.forename: Lihong
authors.initials: L
authors.lastname: Qiu
authors.forename: Jie
authors.initials: J
authors.lastname: Sun
authors.forename: Yu
authors.initials: Y
authors.lastname: Shang
authors.forename: Xudong
authors.initials: X
authors.lastname: Jiang
authors.forename: Tangdong
authors.initials: T
authors.lastname: Ge
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
mesh_terms: D000818:Animals; D017173:Caenorhabditis elegans / Q000201:enzymology; D002478:Cells, Cultured; D004281:Docosahexaenoic Acids / Q000737:chemistry*; D005056:Euglena gracilis / Q000201:enzymology; D044943:Fatty Acid Desaturases / Q000096:biosynthesis*; D019787:Linoleic Acid / Q000737:chemistry*; D008322:Mammals; D014162:Transfection
chemical_list: D004281:Docosahexaenoic Acids; D019787:Linoleic Acid; D044943:Fatty Acid Desaturases