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Interestingly, in an analogous manner to how oleate is formed from the elongation of palmitoleate, the monounsaturated fatty acid cis-8-octadecanoate is formed from the elongation of sapienate.

Palmitoleate and oleate are building blocks for the generation of membrane lipids that are essential for cancer-cell survival.

Incorporation of sapienate and cis-8-octadecanoate into membrane lipids could result in differences in membrane fluidity, curvature or the association of membrane proteins, compared with the corresponding characteristics of membrane lipids made with palmitoleate and oleate.

The presence of oleate completely restored the fat content in the cell back to normal, Lewandowski says, and the hearts contracted better and showed normalized genes that help in fat metabolism.

They delivered two types of fat directly to the hearts—either oleate, the kind of fat found in olive oil and canola oil, or palmitate, which is in dairy products, palm oil and animal fat.