Changes in Gut Microbiota Linked to a Reduction in Systolic Blood Pressure in Spontaneously Hypertensive Rats Fed an Extra Virgin Olive Oil-Enriched Diet

• Published in: Plant foods for human nutrition (Dordrecht) Vol. 73; no. 1; pp. 1 - 6
• Main Authors: Hidalgo, Marina, Prieto, Isabel, Abriouel, Hikmate, Villarejo, Ana Belén, Ramírez-Sánchez, Manuel, Cobo, Antonio, Benomar, Nabil, Gálvez, Antonio, Martínez-Cañamero, Magdalena
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2018; Springer Nature B.V
• Subjects: Animals; Blood pressure; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Diet; Digestive system; Digestive tract; Ecology; Enrichment; Feces; Food Science; Gel electrophoresis; Hypertension; Intestine; Microbiota; Microorganisms; Nutrition; Oils & fats; Olive oil; Original Paper; Plant Physiology; Pressure effects; Primers; Rats; Rodents; Gut microbiota; Hypertension; Extra virgin olive oil; Feces
• ISSN: 0921-9668; 1573-9104
• DOI: 10.1007/s11130-017-0650-1

Fat type in diet is responsible for specific changes in gut microbiota (GM). Extra virgin olive oil (EVOO) has been shown to be beneficial for blood pressure and to produce effects on GM. To analyze the cause-effect relationship between intestinal microbial changes and blood pressure, we studied the effect of EVOO on fecal microbiota and systolic blood pressure (SBP) levels in spontaneously hypertensive rats (SHR). SHR were fed either an enriched EVOO diet or a standard diet for a period of 12 weeks. At the end of the experimental period, the microbial profiles in the feces were studied in both groups by using PCR-denaturing gradient gel electrophoresis. Real-time PCR was used to quantify the selected bacterial groups. The results demonstrated significant differences when using Lactobacillus ( p <0.05), clostridia XIV ( p <0.01) and universal ( p <0.05) primers. A significant ( r =−0.475; p =0.04) inverse correlation between the abundance of clostridia XIV and SBP, which depends on the type of diet, was also observed. Finally, the results suggested an increase in the microbial diversity of the feces of the animals fed the EVOO diet. These results strongly connect the pattern of GM in SHR fed a diet enriched with EVOO to the lower levels of SBP observed in these animals at the end of the feeding period.