Abstract
We report a patient diagnosed with Aicardi-Goutières syndrome (AGS) with homozygous TREX1 gene mutation. Her magnetic resonance angiography (MRA) showed intracerebral large artery disease, which was rarely reported in the past in TREX1 AGS patients. Her younger sister also had homozygous TREX1 gene mutation and died of necrotizing enterocolitis. Intracerebral large artery involvement has been seen as a particular feature of SAMHD1-related disease. Our patient also had arthropathy, which is a finding more commonly mentioned in SAMHD1-related diseases. The observations in our case may contribute to our understanding of the pathogenetic mechanism of TREX1 AGS, involving the intracerebral large arteries, arthropathy, and possibly the gastrointestinal tract.
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We sincerely thank the patient and her parents for their cooperation in the testing of genetic samples and their consent to this publication.
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ESM 1
Supplementary Figure. Genealogic tree. The index patient has homozygous TREX1 c.292_293insA variant, so does her younger sister, who deceased at 20 days old due to necrotizing enterocolitis. Her parents were unrelated, and both had heterozygous TREX1 c.292_293insA variant. The genetic study of both grandparents was not done. (JPG 24 kb)
ESM 2
Supplementary Table TREX1 gene variants in Aicardi -Goutieres syndrome patients that have been reported in the literature. (DOCX 24 kb)
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Wu, CC., Peng, S.SF. & Lee, WT. Intracerebral large artery disease in Aicardi-Goutières syndrome with TREX1 mutation: a case report. Neurol Sci 41, 3353–3356 (2020). https://doi.org/10.1007/s10072-020-04516-0
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DOI: https://doi.org/10.1007/s10072-020-04516-0