Unravelling the myriad physiologic roles of transthyretin: critical considerations for treating transthyretin amyloidosis
Bibliographic record
Abstract
Background Transthyretin (TTR) is a highly conserved protein with crucial and broadly protective physiologic roles across organ systems and diseases. Evidence shows that TTR contributes to neuroprotection, cognition, glucose regulation, pregnancy, muscle development, and bone mineralization. In several disease states, including diabetes, Alzheimer’s disease, Lewy body dementia, cerebrovascular disease, and osteoporosis, higher TTR levels may be protective. Numerous studies have shown that low levels of TTR are associated with increased mortality overall and in relation to cardiovascular disease and several malignancies.Purpose There is a growing portfolio of approved and investigational transthyretin amyloidosis (ATTR) treatments that differ in their mechanisms and effects on circulating TTR. When selecting an ATTR therapy, clinicians must decide whether to stabilize and preserve TTR and its functions or knockdown and drastically reduce TTR. This review summarizes the vital physiologic roles of TTR in health and disease. We consider the potential effects on normal biologic pathways that may occur while therapeutically suppressing TTR and discuss clinical decisions concerning ATTR therapies in the context of the summarized literature.Discussion TTR is essential for a broad range of physiologic processes and may confer clinically protective effects in neurologic and other organ systems. While a link between low TTR and severe disease and mortality is well established, it remains unclear whether long-term TTR suppression via ATTR therapies increases risk of disease. Clinical decisions in ATTR, however, should reflect the current understanding of the roles of TTR and the patient’s clinical history.Conclusion TTR serves vital physiologic roles across organ systems. Given its clinically protective properties, continued investigation into the potential long-term impact of TTR suppression via knockdown or gene editing therapies is prudent. ATTR treatment selection should reflect an awareness of the physiologic importance of TTR, as well as consideration of the potential long-term impact of chronic TTR suppression.
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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 | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.004 |
| Insufficient payload (model declined to judge) | 0.004 | 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".