Effect of nutritionally induced hyperlipidaemia on in vitro bovine embryo quality depends on the type of major fatty acid in the diet.
The present study examined whether the effects of dietary-induced hyperlipidaemia on preimplantation embryo development depend on the predominant fatty acid (FA) type in the diet. In a combined in vivo-in vitro bovine model, two groups of cows (n=3 in each group) were fed with three diets consecutively (4 weeks feeding for each): (1) a maintenance control diet (CONT); (2) a high-starch diet rich in saturated fat (SAT); and (3) a high-starch diet rich in omega-3 unsaturated fat (UNSAT). Two feeding sequences were used to test for carry-over effects: Group A was fed CONT, SAT1 and then UNSAT2, whereas Group B was fed CONT, UNSAT1 and then SAT2. Serum was collected after each dietary period, analysed and tested in bovine in vitro embryo culture. Introducing SAT and UNSAT diets induced hyperlipidaemia (specifically hypercholesterolaemia and elevated free FAs) and reduced insulin sensitivity. Carry-over effects in serum metabolites and FA profile were dependent on the diet and feeding sequence. SAT1 and SAT2 serum decreased blastocyst rates and altered blastocyst mRNA expression related to apoptosis and oxidative stress. UNSAT1 and UNSAT2 serum resulted in normal embryo development and quality. Other in vitro effects depended on the sequence of feeding. In conclusion, substitution of saturated fat with omega-3 fat in a high-caloric diet induced hyperlipidaemia with an FA profile yielding similar rates and quality of blastocysts compared with normolipidaemic controls.
Gamete Research Centre, Laboratory for Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium.
Waleed F A
WFA
Marei
Gamete Research Centre, Laboratory for Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium.
Maria Arias
MA
Alvarez
Gamete Research Centre, Laboratory for Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium.
Veerle
V
Van Hoeck
Departamento de Reproduccion Animal, Instituto nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Ctra. De la CorunaKm 5.9, Madrid 28040, Spain.
Alfonso
A
Gutierrez-Adan
Gamete Research Centre, Laboratory for Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium.
Peter E J
PEJ
Bols
Gamete Research Centre, Laboratory for Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium.
Jo L M R
JLMR
Leroy
D000818:Animals; D017209:Apoptosis / Q000502:physiology; D001755:Blastocyst / Q000378:metabolism*; D002417:Cattle; D004032:Diet / Q000662:veterinary*; D004041:Dietary Fats; D047108:Embryonic Development / Q000502:physiology*; D005227:Fatty Acids / Q000378:metabolism*; D005260:Female; D006949:Hyperlipidemias / Q000378:metabolism*; D059471:In Vitro Oocyte Maturation Techniques / Q000662:veterinary; D018384:Oxidative Stress / Q000502:physiology; D011247:Pregnancy
D004041:Dietary Fats; D005227:Fatty Acids