Novel missense mutation of the UGT1A1 gene in Thai siblings with Gilbert's syndrome
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Bibliographic record
Abstract
BACKGROUND: Gilbert's syndrome is a common inherited disorder of bilirubin metabolism contributing to the development of neonatal jaundice and causing recurrent jaundice after the neonatal period. In the patients with Gilbert's syndrome, mutations have been reported in the promoter and exons of the uridine diphosphate-glucuronosyl transferase 1 (UGT1A1) gene on chromsome 2q37, which encodes bilirubin uridine diphosphate-glucuronosyltransferase. However, the genetic basis of Gilbert's syndrome, including its inheritance trait, remains to be clarified. METHODS: Patients 1 and 2 were Thai sisters with Gilbert's syndrome. They had a history of prolonged neonatal jaundice and showed recurrent jaundice after their infancy, while the parents showed no symptoms. To search for the mutation in the patients, all exons of the UGT1A1 gene were amplified by polymerase chain reaction (PCR) and sequenced directly. The frequency of the mutation in controls was studied by PCR-restriction enzyme digestion method. RESULTS: The patients were homozygous for a novel single transition of T to C at nucleotide position 247 (exon 1), which would predict a substitution of leucine for phenylalanine at codon 83 of the enzyme protein. No other mutation was detected in any regions except exon 1. The parents with no symptoms showed heterozygosity for the mutation. Among the 110 Japanese controls, no homozygous individuals and three heterozygous individuals for the mutation were identified, giving a mutated allele frequency of 0.0136. CONCLUSIONS: A novel missense mutation in the UGT1A1 gene was identified in two Thai siblings with Gilbert's syndrome. The affected family showed that homozygosity for the mutation may lead to apparent symptoms and that the syndrome was inherited as an autosomal recessive trait. The mutation does not explain a high incidence of neonatal jaundice in Japan, because it is very rare in the Japanese population.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it