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Tuberous sclerosis: proline and hydroxyproline contents in serum
Brain & Development
|January 1, 1983
Summary
Tuberous sclerosis (TS) patients aged 9-18 showed significantly higher serum free proline levels compared to controls. This suggests abnormal proline metabolism regulation in TS, an autosomal dominant disorder.
Area of Science:
- Biochemistry
- Genetics
- Metabolic Disorders
Background:
- Tuberous sclerosis (TS) is an autosomal dominant genetic disorder.
- Proline and hydroxyproline metabolism alterations may be implicated in TS pathogenesis.
Purpose of the Study:
- To investigate serum proline and hydroxyproline levels in patients with tuberous sclerosis.
- To compare these levels with age-matched pathological controls.
Main Methods:
- Serum samples from 30 TS patients and 32 controls were analyzed.
- High-performance liquid chromatography with post-labeling was used for quantification.
- o-phthalaldehyde and sodium hypochlorite were employed as labeling agents.
Main Results:
- No significant difference in serum free hydroxyproline levels was found between TS patients and controls.
- Significantly higher mean serum free proline levels (approx. 50 mumol/L) were observed in TS patients aged 9-18 years.
- Age-dependent patterns for total and free hydroxyproline were similar in both groups.
Conclusions:
- Elevated serum free proline in TS patients may indicate abnormal proline metabolism regulation.
- Hydroxyproline levels do not appear to be significantly altered in TS.
- Further research into proline metabolic pathways in TS is warranted.