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On the etiopathogenesis and therapy of Down syndrome
1Department of Anatomy, University of Helsinki, Finland.
Abstract:
The etiopathogenesis of Down syndrome is reviewed concentrating on the possible consequences of over-expression of cytoplasmic superoxide dismutase gene located in chromosome 21. Increased superoxide dismutase activity may generate free radical stress through overproduction of hydrogen peroxide. The significance of inadequate adaptive responses, i.e. increase of the selenoenzyme glutathione peroxidase activity in the central nervous system and in the thyroid gland is discussed. Suggestions are made for prevention of the progress of Down syndrome and intervention studies with antioxidant supplementation are proposed.
Insights
Down syndrome may result from an overactive superoxide dismutase gene, increasing harmful hydrogen peroxide. Antioxidant supplements may help prevent Down syndrome progression by boosting protective enzymes.
Area of Science:
- Biochemistry
- Genetics
- Developmental Biology
Background:
- Down syndrome is linked to chromosome 21 genetic anomalies.
- Overexpression of the superoxide dismutase gene on chromosome 21 is a key factor.
Purpose of the Study:
- To review the etiopathogenesis of Down syndrome.
- To explore the role of superoxide dismutase gene overexpression and antioxidant responses.
Main Methods:
- Literature review focusing on genetic and biochemical mechanisms.
- Analysis of oxidative stress markers and antioxidant enzyme activity.
Main Results:
- Increased superoxide dismutase activity leads to excess hydrogen peroxide production.
- Inadequate adaptive responses, including reduced glutathione peroxidase activity, exacerbate oxidative stress.
Conclusions:
- Oxidative stress from superoxide dismutase overproduction is central to Down syndrome pathogenesis.
- Antioxidant supplementation strategies are proposed for prevention and intervention.