trichothiodystrophy syndromes/catalase

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Striking differences in cellular catalase activity between two DNA repair-deficient diseases: xeroderma pigmentosum and trichothiodystrophy.

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Ingia / Ingia

Xeroderma pigmentosum (XP) and trichothiodystrophy (TTD) are two recessively transmitted human diseases characterized by DNA repair deficiency. While XP is associated with a very high incidence of cancer on skin exposed to sunlight, TTD is not a cancer-prone disease. Therefore, unrepaired UV-induced

Low catalase activity in xeroderma pigmentosum fibroblasts and SV40-transformed human cell lines is directly related to decreased intracellular levels of the cofactor, NADPH.

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Ingia / Ingia

We have previously shown that fibroblasts from ultra-violet (UV) hypersensitive xeroderma pigmentosum patients (XP) are markedly deficient in catalase activity resulting in high intracellular levels of hydrogen peroxide (H2O2) following UV irradiation. No direct correlation between catalase activity

UV-induced mutations in a shuttle vector replicated in repair deficient trichothiodystrophy cells differ with those in genetically-related cancer prone xeroderma pigmentosum.

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Ingia / Ingia

Trichothiodystrophy (TTD) is a rare genetic disease associated in approximately 50% of patients with DNA repair deficiency analogous to that found in xeroderma pigmentosum group D (XP-D) patients. Although XP-D patients exhibit a very high level of skin cancer on sun-exposed parts, TTD is not

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