Role of the TLR signaling molecule TRIF in β-cell function and glucose homeostasis
Bibliographic record
Abstract
Type 2 diabetes is a metabolic and inflammatory disease characterized by deteriorating islet function and increased levels of inflammatory cytokines. The inflammatory milieu induced in type 2 diabetes exacerbates islet dysfunction and insulin resistance, and therapies that target inflammation can improve glycemic control in patients with type 2 diabetes. Inflammation in type 2 diabetes may be the result of the stimulation of Toll-like receptors (TLRs), one of the many mediators of inflammation. TLRs can be activated by both exogenous and endogenous ligands, and are responsible for activating NFκB and interferon- inducible inflammatory gene expression. We examined the role of the TIR-domain containing adaptor-inducing interferon-β (TRIF or TICAM-1), a major signaling molecule for TLR3 and TLR4, in b-cell function and glucose homeostasis by examining mice lacking TRIF (Trif⁻(/)⁻), TLR3 (Tlr3⁻(/)⁻) or TLR4 (Tlr4⁻(/)⁻). Male, 10-week old Trif⁻(/)⁻ mice exhibit a moderate but significant increase in fasting blood glucose compared to C57BL/6 controls (12.0 ± 0.9 vs. 9.7 ± 0.4 mM; p < 0.05) as well as impaired glucose tolerance revealed by IPGTT (AUC: 2850 ± 236 vs. 2050 ± 108; p < 0.005) whereas Tlr3⁻(/)⁻ and Tlr4⁻(/)⁻ mice have normal glucose tolerance. Interestingly, Trif⁻(/)⁻ mice have normal insulin sensitivity yet have increased plasma insulin levels (180 ± 22 vs. 89 ± 24 pM; p < 0.05). Islets isolated from Trif⁻(/)⁻ mice have impaired glucose-stimulated insulin secretion, with a diminished first-phase insulin response to glucose. Immunohistological analysis revealed that age-matched Trif⁻(/)⁻ and control mice have normal islet morphology, although Trif⁻(/)⁻ mice have increased b-cell mass (3.5 ± 0.9 vs. 1.7 ± 0.2 mg; p < 0.05). In summary, mice lacking TRIF have hyperglycemia associated with b-cell dysfunction that may be partly compensated for by increased b-cell mass. These studies suggest a role for TLR signaling in glucose homeostasis, and raise the possibility that TRIF signaling is required for normal b-cell function.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".