Lipid synthesis and Storage Flashcards

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1
Q

What lipoprotein is elevated in Type 1 Hypertriglyceridemia

A

Chylomicrons

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2
Q

Type 1 Hypertriglyceridemia is due to a deficiency in

A

Lipoprotein Lipase (rare)

apoC-2 (rare)

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3
Q

Job of lipoprotein lipase

A

Removes fatty acid from chylomicron and VLDL

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4
Q

What is the function of apoC-2

A

Activates lipoprotein lipase

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5
Q

Type 1 Hypertriglyceridemia genetics

A

AD

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6
Q

VLDL function

A

Transports TG from liver to tissue

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7
Q

VLDL apoproteins

A

apoB-100

apoC-2

apoE

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8
Q

Glycerol 3-P dehydrogenase converts

A

DHAP to Glycerol 3-P

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9
Q

Type 2a hypercholesterolemia clinical

A
  1. high risk of atherosclerosis and CAD
  2. Xanthomas of the Achilles tendon
  3. Tuberous xanthomas on elbows
  4. Xanthelasmas
  5. Corneal arcus
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10
Q

LDL apoproteins

A

apoB-100

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11
Q

Abetalipoproteinemia is due to deficiency in

A

apoB-100 and apoB-48

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12
Q

Acetyl CoA carboxylase requires

A

Biotin

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13
Q

What is the primary end product of FA synthesis

A

Palmitic acid (Palmitate)

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14
Q

What lipid is elevated in Type 1 Hypertriglyceridemia

A

Triglycerides

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15
Q

FA synthase converts

A

Malonyl CoA to FA palmitate

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16
Q

Function of Chylomicrons

A

Transport dietary TG and cholesterol from intestine to tissue

17
Q

What does LCAT do

A

adds a FA to cholesterol producing Cholesterol esters

18
Q

Type 2a hypercholesterolemia genetic

A

AD

19
Q

Lipid elevated in Type 2a hypercholesterolemia

A

Cholesterol

20
Q

What are the two sources of Glycerol 3-P

A
  1. Reduction of DHAP from glycolysis by glycerol 3-P
  2. Phosphorylation of free glycerol by glycerol kinase
21
Q

Chlyomicron apoproteins

A

apoB-48

apoC-2

apoE

22
Q

Type 1 Hypertriglyceridemia clinical

A

Red-orange eruptive xanthomas

Fatty liver

Acute pancreatitis

Abdominal pain after fatty meal

23
Q

What is needed for the synthesis of Triglycerides

A

Glycerol 3-P

24
Q

LDL function

A

Delivers cholesterol into cell

25
Q

IDL function

A

picks up cholesterol from HDL to become LDL

26
Q

FA synthase requires

A

NADPH

27
Q

Type 2a hypercholesterolemia deficiency in

A

LDL-receptor

28
Q

Lipoprotein elevated in Type 2a hypercholesterolemia

A

LDL

29
Q

Two important essential FA

A

Linolenic acid

Linoleic acid

30
Q

HDL apoprotein

A

apoA-1

31
Q

HDL function

A
  1. Picks up cholesterol accumulating in BV
  2. Delivers cholesterol to liver and steriodogenic tissues via scavenger receptor (SR-B1)
  3. Shuttles apoC-2 and apoE in blood
32
Q

Malic enzyme converts

A

Malate to pyruvate

Increase NADPH

33
Q

LCAT activated by

A

apoA-1

34
Q

What does fatty acyl CoA synthetase do

A

Attach CoA to FA

35
Q

Triglycerides are formed by

A

Attaching 3 FA to Glycerol

36
Q

Acetyl CoA carboxylase converts

A

Acetyl CoA to Malonyl CoA

37
Q

IDL apoproteins

A

apoE

apoB-100

38
Q

Abetalipoproteinemia clinical

A
  1. Steatorrhea
  2. Cerbellar ataxia
  3. Pigmentary degeneration in the retina
  4. Acanthocytes (thorny appearing erythrocytes)
  5. Loss of night vision