Type 2 & other diabetes

The GLP‐1 receptor agonist exenatide reduces serum TSH by its effect on body weight in people with type 2 diabetes

Clin Endocrinol (Oxf)Published Prospective cohort study

Authors' conclusion

Exenatide therapy reduces serum TSH levels and improves central sensitivity to TH action over 12 months via its effect on weight loss. The effectiveness of weight loss strategies, rather than TH replacement, should be investigated in individuals with obesity and mildly raised serum TSH levels.

Study context

Population
Patients with T2D and obesity commenced on exenatide; mean age 53.5 years, 43.8% female, mean BMI 39.8 kg/m²
Participants
112 patients
Outcome
Relationship between changes in body weight and serum TSH and resistance to TH indices
Follow-up
12 months
Methodological detailssingle-arm
  • Single-arm

Main finding

As reported in the abstract

GroupValuePercent body weight loss, mean (95% CI)
Exenatidemean −0.25 (95% CI −0.43–-0.06) mU/L6.5% (5.0%-8.1%)

Exenatide

Valuemean −0.25 (95% CI −0.43–-0.06) mU/L
Percent body weight loss, mean (95% CI)6.5% (5.0%-8.1%)

mU/L

Significant negative nonlinear relationship between change in TSH and % weight loss: TSH change with 5% loss
−0.25
TSH change with 10% weight loss
−0.4
TSH change with 15% weight loss
−0.5
TSH rise with 5% weight gain
0.5

Observational data: associations, not effects.

Further findings

No changes in serum FT4 with weight loss
Significant reduction in resistance to thyroid hormones (TH) indices

Original publication

The GLP‐1 receptor agonist exenatide reduces serum TSH by its effect on body weight in people with type 2 diabetes. Clin Endocrinol (Oxf). Published 7 March 2023. doi:10.1111/cen.14901

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