New approaches to treating hypothyroidism with LT4/LT3 therapy
Official title: New Approaches for the treatment of Hypothyroidism
Funded at University of Connecticut Sch of Med/dnt · NIH-11365817 · Data updated 2026-11-12
A clinical study aims to find safer, more effective LT4/LT3 treatment regimens for adults with hypothyroidism to improve symptoms and heart health.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | University of Connecticut Sch of Med/dnt NIH-funded |
| Lab location | 1 site (Farmington, United States) |
| Project start | August 1, 2024 |
| Project end | June 30, 2027 |
| Funding year | 2026 |
| Award (this year) | $333,000 |
| NIH project number | 5R01DK140455-03 |
| Project ID | NIH-11365817 on NIH RePORTER |
Who could benefit from this research
✓Could help
Adults with hypothyroidism currently treated with LT4 who may benefit from LT4/LT3 combination therapy.
✕Less likely to help
Patients who respond well to LT4 alone or have contraindications to LT3 may not benefit.
What this research studies
This project explores whether a combination of LT4 and LT3 can better normalize thyroid hormone levels across tissues than LT4 alone. Researchers will examine dosing strategies, timing, and safety to identify regimens suitable for larger clinical trials. The study builds on prior pharmacokinetic and pharmacodynamic work and seeks to translate findings into practical treatment guidelines. If successful, the results could lead to improved quality of life and cardiovascular outcomes for people living with hypothyroidism.
Why it matters
Potential benefit: If successful, patients could have a safer and more effective thyroid hormone therapy that improves symptoms and lowers cardiovascular risk.
How similar studies have gone: Prior LT4/LT3 studies showed mixed results; this work aims to define optimal dosing and safety for broader use.
Where this research is happening
-
University of Connecticut Sch of Med/dnt
Farmington, United States Active
Researchers
- Principal investigator: Celi, Francesco S — University of Connecticut Sch of Med/dnt
- Study coordinator: Celi, Francesco S
Related research
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Discontinuing low-dose levothyroxine in older adults with subclinical hypothyroidism
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Better Ways to Treat Hypothyroidism
This project looks for the best way to combine two thyroid hormones, LT4 and LT3, to help people with hypothyroidism feel better and reduce heart risks.
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Investigating the effectiveness of combined T4 and T3 therapy for hypothyroidism
This study is looking into how a combination of two thyroid hormones, LT4 and LT3, might help people with hypothyroidism feel better, especially since some still have symptoms even while taking the usual treatment.
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Improving care for patients with hypothyroidism using real-world data
This study is looking at how well people with hypothyroidism are treated over time and how their thyroid hormone levels affect heart health, so if you're living with this condition, your health data could help us find better ways to manage it!
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New treatments for hypothyroidism
This study is looking at new ways to treat hypothyroidism by testing a combination of two thyroid hormones to see how they work together, and it's for people who want better options for managing their condition.
About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page.