The ganglioside profile of mouse brain does not respond to changes in dietary n-3 polyunsaturated fatty acid supply

In mice, dietary n-3 long-chain polyunsaturated fatty acid supply from gestation to adulthood does not alter the brain ganglioside composition, despite changes in phospholipid fatty acids.

• Why it matters: Because n-3 LC-PUFAs are linked to brain development and neurological function, it is important to identify which lipid classes actually shift with dietary manipulation and could mediate effects.
• What they did: Lipidomic analyses were used to compare brain phospholipids and gangliosides after feeding mice either an n-3 LC-PUFA-deficient or an n-3 LC-PUFA-supplemented diet from gestation to adulthood.
• The result: The diet changed phospholipid levels of DHA (C22:6n-3) and DPA (C22:5n-6) in opposite directions, but ganglioside composition remained unaffected, implying gangliosides do not directly mediate these dietary effects.

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