Renal Involvement and Novel Kidney Biopsy Findings in a Young Girl With Aicardi-Goutières Syndrome
Bibliographic record
Abstract
Introduction: Aicardi-Goutières Syndrome (AGS) is an inherited type I interferonopathy (IFN) characterized by a spectrum of disease manifestations, including neurologic (e.g. microcephaly, global developmental delay, spastic paresis, dystonia, cerebral calcifications) and systemic manifestations (e.g. hypothyroidism, skin lesions, recurrent fevers). Mutations in TREX1, RNASEH2A, RNASEH2B, RNASEH2C, SAMHD1, ADAR1 or IFIH1 have been associated with AGS. Clinical presentation is heterogeneous, with variable onset of disease. Renal involvement has only been rarely reported. Case Description: A 3-year-old girl with a severe phenotype of AGS due to two pathogenic variants in TREX1 had recurrent vomiting, irritability, and generalized panniculitis only partially responsive to prednisolone 1mg/kg/day. While undergoing screening assessment for JAK1/2 inhibitor therapy, she was found to have severe hypertension (136/94mmHg), hypoalbuminemia (20g/L) and nephrotic range proteinuria (urine protein:creatinine 12.5g/g). Renal function was normal. She was initially treated with enalapril, amlodipine, and prazosin. The renal biopsy revealed podocyte hypertrophy, abundant tubuloreticular inclusions and mild immune complex deposition. Despite initial concerns about EBV viremia and transaminitis, the patient was treated with baricitinib (initially 2mg BID, maximal dose reached 2mg TID). Improvement of vomiting, panniculitis, and irritability was observed over 3 months. Proteinuria also significantly improved (urine protein:creatinine 0.24g/g). Prednisolone was successfully weaned, and antihypertensive treatment reduced to enalapril alone. The patient has remained stable for 18 months, without any EBV disease. Discussion: Renal involvement has not previously been described in association with TREX1 mutations. Biopsy findings were novel, showing mixed features of podocytopathy, scattered immune deposition, and features of vascular lesions rather than one dominant histopathologic pattern. The effectiveness of JAK1/2 inhibitors in IFN with renal involvement has not been definitively established, but case reports have been encouraging. The correlation between JAK1/2 inhibition and clinical improvement in this case supports the use of baricitinib in other interferon-related disorders.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".