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Changes in tissue polyunsaturated fatty acids with age, in spontaneously hypertensive rats

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Lipids

Abstract

The relationship between the biosynthesis of long-chain fatty acids and their distribution in the key organs of hypertension is of considerable interest because of their role in the production of vasoactive eicosanoids and their effects on membrane properties. The present study analyzed the fatty acid compositions of the total lipids in the kidney, aorta, heart, and hepatocytes of 1-, 3-, and 6-mon-old spontaneously hypertensive rats (SHR) and their normotensive controls, Wistar Kyoto rats (WKY) by capillary gas chromatography. The major changes concerned the polyunsaturated fatty acids (PUFA). The percentage of arachidonic acid (AA) was significantly greater in the 1-mon-old SHR kidney than in the WKY kidney, but it was lower at 3 and 6 mon. The percentage of eicosapentaenoic acid was very low in the SHR kidney. The results for the aorta were similar, with marked decreases in 18:2n−6 and 18:3n−3 in SHR aged 1 and 6 mon. Despite a higher proportion of 18:2n−6 and AA at 6 mon, there was no major change in the SHR heart lipids. The fatty acid spectrum in the liver provides additional evidence for the previously reported inhibition of desaturase activities in SHR. Thus, this study shows that the PUFA composition is modified differently in different tissues in SHR, and this may be related to the pathogenesis of hypertension in these animals.

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Abbreviations

AA:

arachidonic acid

DGLA:

dihomo-γ-linolenic acid

DHA:

docosahexaenoic acid

DPA:

docosapentaenoic acid

EPA:

ercosapentaenoic acid

LA:

linoleic acid

PL:

phospholipids

PUFA:

polyunsaturated fatty acids

SFA:

saturated fatty acids

SHR:

spontaneously hypertensive rat

WKY:

Wistar Kyoto

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Correspondence to Michel Narce.

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Delachambre, MC., Narce, M., Asdrubal, P. et al. Changes in tissue polyunsaturated fatty acids with age, in spontaneously hypertensive rats. Lipids 33, 795–801 (1998). https://doi.org/10.1007/s11745-998-0272-0

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  • DOI: https://doi.org/10.1007/s11745-998-0272-0

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