Heterogeneity of Nuclear Lamin A Mutations in Dunnigan-Type Familial Partial Lipodystrophy*
Bibliographic record
Abstract
We previously identified a novel mutation, namely LMNA R482Q, that was found to underlie Dunnigan-type partial lipodystrophy (FPLD) and diabetes in an extended Canadian kindred. We have since sequenced LMNA in five additional Canadian FPLD probands and herein report three new rare missense mutations in LMNA: V440M, R482W, and R584H. One severely affected subject was a compound heterozygote for both V440M and R482Q. The findings indicated that 1) a spectrum of LMNA mutations underlies FPLD; 2) aberrant lamin A, and not lamin C, is likely to underlie FPLD, as R584H occurs within LMNA sequence that is specific for lamin A; 3) the V440M mutation may not cause lipodystrophy on its own; 4) compound heterozygosity for V440M and R482Q is associated with a relatively more severe FPLD phenotype, but not with complete lipodystrophy; and 5) variation in the severity of the phenotype might be related to environmental factors.
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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 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".