Daily Endocrinology Research Analysis
Analyzed 112 papers and selected 3 impactful papers.
Summary
A randomized controlled trial shows that time-restricted eating yields weight loss comparable to daily calorie restriction in women with PCOS. Mechanistic work identifies primary cilia as essential for GLP-1–mediated β-cell signaling, informing incretin pharmacology. A nationwide cohort reveals that underweight status markedly elevates respiratory infection mortality in people with diabetes, highlighting a high-risk phenotype for targeted prevention.
Research Themes
- Nutritional interventions for obesity and PCOS
- Cellular mechanisms of incretin signaling in β-cells
- Infection mortality risk stratification in diabetes by BMI
Selected Articles
1. Time-restricted eating for body weight management in women with polycystic ovary syndrome: a randomized controlled trial.
In women with PCOS, a 6-hour time-restricted eating window achieved significant 6-month weight loss comparable to daily 25% calorie restriction and superior to no intervention. Safety was acceptable with no serious adverse events reported.
Impact: Provides head-to-head randomized evidence supporting TRE as a viable, low-burden dietary strategy for weight management in PCOS, a population with weight-loss resistance.
Clinical Implications: Clinicians can offer TRE (e.g., 6-hour window) as an alternative to calorie counting for weight management in PCOS, with expected ~4–5% weight loss over 6 months and acceptable tolerability.
Key Findings
- TRE induced -4.32% body weight change at 6 months versus control (P<0.01), comparable to calorie restriction (-4.66%).
- No significant difference between TRE and CR (0.34% [95% CI -2.15, 2.83], P=0.79).
- No serious adverse events were reported across groups.
Methodological Strengths
- Randomized controlled design with active (CR) and control comparators.
- Prospective registration (ClinicalTrials.gov NCT05629858) and clear primary endpoint.
Limitations
- Modest sample size and single TRE window (6 hours) may limit generalizability.
- Focused on weight change; limited reporting on metabolic, reproductive, or endocrine endpoints.
Future Directions: Test different TRE windows and durations, assess metabolic and reproductive outcomes in PCOS, and compare TRE combined with pharmacotherapy.
Polycystic ovary syndrome (PCOS) is an endocrinological disorder characterized by weight-loss resistance. Time-restricted eating (TRE) has become a popular weight-loss tool. However, the efficacy of TRE for weight management in PCOS remains understudied. We evaluated the effectiveness of TRE compared with standard care (daily calorie restriction (CR)) and a no-intervention control in women with PCOS. Seventy-six participants were randomly assigned to one of three groups for 6 months: a 6-hour TRE regimen (all meals consumed between 1 p.m. and 7 p.m., without calorie tracking), a CR plan (25% daily energy restriction) or a control group with no dietary changes. The primary endpoint was percent change in body weight at 6 months. By month 6, body weight significantly decreased in the TRE group (-4.32% (95% CI, -6.20, -2.44), P < 0.01) and the CR group (-4.66% (95% CI, -7.13, -2.19), P < 0.01), relative to controls, with no difference between the TRE and CR groups (0.34% (95% CI, -2.15, 2.83), P = 0.79). No serious adverse events were reported. Our results show that in women with PCOS, TRE induced greater weight loss than the controls and was comparable to that achieved with daily CR. ClinicalTrials.gov registration: NCT05629858 .
2. Primary cilia regulate GLP-1 signaling in pancreatic β cells.
β-cell primary cilia are required for full GLP-1 receptor signaling; cilia loss blunts GLP-1–induced cAMP/Ca2+ responses and insulin secretion in mouse and human islets. This identifies a previously unrecognized cellular compartment essential for incretin responsiveness.
Impact: Reveals a novel mechanistic requirement—primary cilia—for GLP-1R signaling in β-cells, with implications for variability in incretin therapy response and potential new targets.
Clinical Implications: Understanding cilia-dependent incretin signaling may inform why some patients exhibit reduced GLP-1RA efficacy and guide strategies to enhance β-cell responsiveness.
Key Findings
- Loss of β-cell primary cilia in mouse and human islets markedly reduced GLP-1–potentiated insulin secretion.
- Blunted whole-cell cAMP and Ca2+ responses preceded impaired insulinotropic effects when cilia were absent.
- Identifies the primary cilium as an essential compartment for GLP-1 receptor signaling in β-cells.
Methodological Strengths
- Cross-species validation in mouse and human islets with convergent readouts (cAMP, Ca2+, insulin secretion).
- Mechanistic interrogation of cellular compartmentalization of GPCR signaling.
Limitations
- In vivo systemic metabolic outcomes and therapeutic modulation were not detailed.
- Quantitative sample sizes and effect sizes are not specified in the abstract.
Future Directions: Assess whether cilia integrity predicts clinical GLP-1RA response and test interventions that preserve or enhance β-cell ciliary signaling.
Glucagon-like peptide-1 receptor agonists (GLP-1RAs) are mainstay therapies for diabetes and obesity, acting in part by enhancing glucose-dependent insulin secretion. While the primary cilium is a known signaling compartment for certain G-protein coupled receptors (GPCRs), its role in the β-cell response to incretins remains undefined. Here, we show that primary cilia are essential for full GLP-1R signaling. Loss of β-cell cilia in mouse and human islets severely impaired GLP-1-potentiated insulin secretion, an effect preceded by blunted whole-cell cAMP and Ca
3. Underweight Status Amplifies Respiratory Infection Mortality in Diabetes: Findings From a Nationwide Cohort Study.
In over 2.5 million adults with type 2 diabetes followed for a median of 6 years, underweight status independently predicted higher mortality from respiratory infections (influenza/pneumonia, tuberculosis, COVID-19), even after competing risk adjustment.
Impact: Defines low BMI as a high-risk phenotype for infection-related mortality in diabetes at national scale, informing targeted vaccination, nutrition, and infection-prevention strategies.
Clinical Implications: Screen for and address underweight in diabetes management; prioritize vaccination, nutrition support, and early infection management in underweight patients.
Key Findings
- Nationwide cohort included 2,508,409 adults with type 2 diabetes; 18,024 died from respiratory infections over a median 6 years.
- Underweight status independently predicted higher mortality from influenza/pneumonia, tuberculosis, and COVID-19 after multivariable and competing risk adjustments.
- Findings highlight low BMI as a marker of vulnerability in diabetes care.
Methodological Strengths
- Very large, population-based cohort with linkage to national mortality data.
- Robust statistical adjustment including competing risks and multiple confounders.
Limitations
- BMI likely assessed at baseline only; residual confounding (e.g., frailty, unmeasured illness) may persist.
- Abstract truncation precludes detailed effect size reporting here.
Future Directions: Elucidate causal pathways linking underweight to infection mortality and test targeted nutrition and vaccination strategies in underweight diabetes populations.
BACKGROUND: Diabetes increases susceptibility to infectious respiratory diseases, but the impact of underweight status on mortality from these conditions remains unclear. We evaluated the association between low body mass index (BMI) and respiratory infection-related mortality in a large nationwide cohort of individuals with diabetes. METHODS: We conducted a population-based cohort study using linked Korean national health and mortality data, including 2 508 409 adults with type 2 diabetes. Participants were stratified by BMI and followed for cause-specific mortality from influenza/pneumonia, tuberculosis and COVID-19. Cox proportional hazards models were used to estimate adjusted hazard ratios (aHRs), accounting for demographics, lifestyle factors, comorbidities and competing risks. RESULTS: Over a median follow-up of 6 years, 18 024 (0.72%) participants died due to respiratory infections. Compared to individuals with BMI ≥ 18.5 kg/m CONCLUSIONS: Underweight status is a strong, independent predictor of respiratory infection-related mortality in individuals with diabetes. Recognition of low BMI as a marker of vulnerability may improve targeted preventive strategies in diabetes care.