Statins and Enzyme Inhibition
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Questions and Answers

The statins inhibit which of the following enzymes?

  • Farnesyl-PP synthase
  • Mevalonate kinase. Squalene epoxidase.
  • HMG CoA Reductase. (correct)
  • HMG CoA synthase.
  • Which one of the following is not allowed to pass through the renal glomerular filtration membrane?

  • Sodium ions.
  • Glucose.
  • Albumin. (correct)
  • Amino Acids. Urea.
  • The laboratory assay for the estimation of total cholesterol depends upon which one of the following?

  • Oxidation of cholesterol and the generation of hydrogen peroxide. (correct)
  • Reduction of cholesterol and the generation of hydrogen peroxide.
  • The formation of cholesterol esters and the generation of hydrogen peroxide. The action of lipase and the reduction of cholesterol.
  • The generation of cholest-4-en-3-one which is a coloured product.
  • The laboratory determined the serum concentration of creatinine in a patient as 1.3 mg/dL. Convert mg/dL to µmol/L given the molecular Weight of creatinine is 113 Da.

    <p>115 µmol/L</p> Signup and view all the answers

    How is medium chain acyl-CoA dehydrogenase (MCAD) deficiency diagnosed by Newborn screening?

    <p>Measuring the level and profile of medium chain acyl-carnitine species in a blood spot</p> Signup and view all the answers

    Which of the following doesn't contribute to the disease pathophysiology of phenylketonuria (PKU)?

    <p>Hyperglycaemia</p> Signup and view all the answers

    Which 2 factors can cause phenylketonuria?

    <p>Impaired phenylalanine hydroxylase activity and tetrahydrobiopterin deficiency</p> Signup and view all the answers

    Which of the following is false about the treatment and life styles of patients with medium chain acyl-CoA dehydrogenase deficiency (MCADD)?

    <p>Patients are treated with diets rich in medium chain fatty acids</p> Signup and view all the answers

    Study Notes

    Enzyme Inhibition

    • Statins inhibit HMG-CoA reductase enzyme.

    Renal Glomerular Filtration

    • The following cannot pass through the renal glomerular filtration membrane: proteins.

    Cholesterol Estimation

    • The laboratory assay for estimating total cholesterol depends on cholesterol oxidase.

    Creatinine Conversion

    • To convert creatinine concentration from mg/dL to µmol/L, use the following formula: µmol/L = (mg/dL x 1000) / 113.

    MCAD Deficiency Diagnosis

    • Medium chain acyl-CoA dehydrogenase (MCAD) deficiency is diagnosed by Newborn screening using tandem mass spectrometry (MS/MS).

    Phenylketonuria (PKU)

    • The following does not contribute to the disease pathophysiology of PKU: ketone bodies.
    • Two factors that can cause PKU are: phenylalanine hydroxylase deficiency and lack of tetrahydrobiopterin (BH4) cofactor.

    MCADD Treatment and Lifestyle

    • The following is false about the treatment and lifestyle of patients with MCADD: carnitine supplementation is always required; in fact, it is only prescribed if there is a secondary deficiency or impaired carnitine biosynthesis.

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    Description

    This quiz question tests your knowledge of statins and their effect on enzymes. Identify the specific enzyme that statins inhibit.

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