Rare Diseases Symptoms Automatic Extraction

Changes of lipoproteins in phenylalanine hydroxylase-deficient children during the first year of life.

[phenylketonuria]

Influence of hyperphenylalaninemia on lipoproteins in early life remains unclear.We enrolled 24 phenylalanine hydroxylase (PAH)-deficient children who were classified into a phenylketonuria (PKU) group (n=12) lacking PAH activity and a benign hyperphenylalaninemia (HPA) group (n=12) having partial PAH activity, and their 11 non-affected siblings. We measured serum total-cholesterol, low-density lipoprotein (LDL)-cholesterol, and high-density lipoprotein (HDL)-cholesterol levels together with apolipoproteins for the first year of life, and compared them with those of 30 age-matched healthy controls.The affected groups invariably had lower cholesterol levels than non-affected groups. At birth, HDL-cholesterol decrease was greatest and predominated over the LDL-cholesterol decrease: total cholesterol, 28/36% decrease to the control level in HPA/PKU; HDL-cholesterol, 33/51%; LDL-cholesterol, 20/28%. At 3months, the opposite changes were observed: total cholesterol, 16/28%; HDL-cholesterol, 13/23%; LDL-cholesterol, 16/33%. At 12months, LDL were still significantly lower in both groups (8/18%, p<.05 and .001), although HDL was significantly decreased only in the PKU group (15%, p<.05). Apolipoprotein A-I/A-II and B changed respectively in accordance with HDL-cholesterol and LDL-cholesterol changes. Despite similar phenylalanine levels, the PKU group invariably had lower cholesterol concentrations than the HPA group had.Irrespective of phenylalanine concentrations, lipoprotein synthesis in PAH-deficient children, particularly in PKU children, was suppressed in early life.

Diseases presenting "total cholesterol" symptom

  • acute rheumatic fever
  • adrenal incidentaloma
  • aromatase deficiency
  • classical phenylketonuria
  • cystinuria
  • oral submucous fibrosis
  • phenylketonuria

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