In Type IV hyperlipoproteinemia, which lipoprotein fraction is increased?

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Multiple Choice

In Type IV hyperlipoproteinemia, which lipoprotein fraction is increased?

Explanation:
Type IV hyperlipoproteinemia shows excess production or decreased clearance of very-low-density lipoprotein (VLDL), which carries triglycerides. In electrophoresis, VLDL migrates in the pre-beta region, so the pre-beta-lipoprotein fraction is elevated. Chylomicrons would dominate only in types I and V, LDL corresponds to beta-lipoprotein, and HDL corresponds to alpha-lipoprotein and is not the feature driving Type IV. So the lipoprotein fraction that's increased is the pre-beta-lipoprotein, reflecting the elevated VLDL.

Type IV hyperlipoproteinemia shows excess production or decreased clearance of very-low-density lipoprotein (VLDL), which carries triglycerides. In electrophoresis, VLDL migrates in the pre-beta region, so the pre-beta-lipoprotein fraction is elevated. Chylomicrons would dominate only in types I and V, LDL corresponds to beta-lipoprotein, and HDL corresponds to alpha-lipoprotein and is not the feature driving Type IV. So the lipoprotein fraction that's increased is the pre-beta-lipoprotein, reflecting the elevated VLDL.

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