Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 18 and up

Progerinin for bone density in Werner syndrome

Official title: A Phase 2, Open-Label Study to Evaluate the Safety and Tolerability of Progerinin for the Treatment of Bone Mineral Density (BMD) Loss in Subjects With Typical Werner Syndrome

Run by PRG Science & Technology Co., Ltd. · NCT05847179 · Data updated 2026-11-12

This phase 2 open-label study tests whether Progerinin is safe and tolerable for adults with typical Werner syndrome and bone mineral density loss when taken twice daily for about a year.

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment5 (estimated)
SponsorPRG Science & Technology Co., Ltd.
Industry-sponsored
Locations1 site (Ann Arbor, Michigan)
StatusRecruiting
StartedOctober 2026
Main results expectedDecember 2027
Study endsDecember 2027
Registry record updatedOctober 5, 2026
Trial IDNCT05847179 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (18 years and older) with a confirmed typical Werner syndrome and osteopenia or osteoporosis who can continue standard bone-supportive therapies and meet all eligibility criteria.

Probably not a fit

Patients with severe comorbidities or who do not respond to Progerinin may not experience a bone-density benefit or could experience adverse effects.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a phase 2, open-label study to assess the safety and tolerability of Progerinin in adults with typical Werner syndrome who have osteopenia or osteoporosis. Up to five participants will receive Progerinin 2400 mg daily, split into 1200 mg twice daily with meals for 12 months. Secondary goals include exploring Progerinin’s effects on bone metabolism, vascular and glucose/lipid metabolism, physical function, and pharmacokinetics in this population. The study is conducted at the University of Michigan under the lead sponsor PRG Science & Technology Co., Ltd.

Why it matters

Potential benefit: Participants may experience stabilization or improvement in bone density and related metabolic parameters, which could reduce fracture risk if the treatment is beneficial.

How similar studies have gone: There is limited prior clinical evidence for Progerinin in Werner syndrome; this study explores a novel approach with preliminary safety data needed.

Who can join: the full rules

Show full inclusion / exclusion criteria
\[Inclusion Criteria\]

1. Subjects must be at least ≥ 18 years of age.
2. Subjects should have a confirmed diagnosis of typical Werner syndrome by genetic analysis.
3. Subjects should be osteopenic (T-score between -1.0 and -2.5) or have confirmed osteoporosis (T-score ≤ -2.5) at screening/baseline. Subjects may continue to receive bone supplements (e.g., bisphosphonates, calcium supplements, Vitamin D supplements, etc.) as appropriate per standard of care throughout the study.
4. Male or non-pregnant, non-lactating female.
5. Subjects screening blood chemistry inclusive of metabolic panel, hematology, and urine analysis results should be acceptable to the investigator.
6. Negative pregnancy test for female subjects as described below. Women of child bearing potential (WOCBP) and Women not of child-bearing potential are eligible to participate. Both women of childbearing potential and women of non-child-bearing potential should use an approved method of birth control and agrees to continue to use this method for the duration of the study and for 90 days after last treatment.

   Acceptable methods of contraception include abstinence, female subject/partner's use of hormonal contraceptive (oral, implanted, or injected) in conjunction with a barrier method (WOCBP only), female subject/partner's use of an intrauterine device (IUD), or if the female subject/partner is surgically sterile or two years post-menopausal. All male subjects/partners must agree to use a In addition, subjects may not donate sperm for the duration of the study and for 90 days after last treatment.

   Females who are less than two (2) years post-menopausal, those with tubal ligations and those using contraception must have a negative serum pregnancy test at baseline within the one (1) week prior to the first study medication administration. Every six weeks, and at study termination a pregnancy test should be performed, either serum or urine stick test. However, if the urine result is positive, a serum pregnancy test will be performed.
7. Provide signed written informed consent and willingness, ability to comply with study requirements.
8. Subject must have a projected life expectancy of ≥ 12 months in the opinion of the Investigator.

\[Exclusion Criteria\]

1. Subject with clinical signs seen at screening are at the final stage of Werner syndrome progression, and completion of the study is difficult to be assessed, including:

   * Subjects who received continuous or intermittent home oxygen therapy for 6 months before obtaining consent
   * Subjects who received at least 2 hospitalizations for pneumonia during the 12 months prior to obtaining consent
   * Subjects who have at least 10% net weight loss and have not recovered. This includes significant net weight loss over the last six months.
2. Subjects with significant dehydration as judged by the principal investigator.
3. Subjects with pericardial fluid, ascites and pleural effusion.
4. Therapy with investigational drugs within 30 days of beginning study medication.
5. History of prior malignancy, except for adequately treated in situ cancer, basal cell, squamous cell skin cancer, or other cancers (e.g., breast, prostate) for which the subject has been disease-free for at least 3 years.
6. Any serious medical condition, laboratory abnormality, psychiatric illness, or comorbidity that, in the judgment of the Investigator, would make the subject inappropriate for the study.
7. Serious systemic fungal, bacterial, viral, or other infection that is not controlled or requires intravenous (IV) treatment for infection(s).
8. Subjects with known history of having Acquired Immunodeficiency Syndrome (AIDS) or with a history known to be infected with Human Immunodeficiency Virus (HIV).
9. Subjects with a history of serious drug hypersensitivity or allergic reaction such as anaphylaxis or any component of the formulation.
10. Clinically significant bleeding within 2 weeks prior to baseline (e.g., gastrointestinal \[GI\] bleeding, intracranial hemorrhage).
11. Medical or recreational use of marijuana or THC-containing compounds within 3 months of screening visit and for the duration of the trial.
12. Pregnant or lactating women.
13. Major surgery, defined as any surgical procedure that involves general anesthesia and a significant incision (i.e., larger than what is required for placement of central venous access, percutaneous feeding tube, or biopsy), within 28 days prior to baseline or anticipated surgery during the study period.
14. Inability to return for scheduled treatment and assessments.
15. Subjects that require concomitant use of any medications or substances that are strong inhibitors or inducers of CYP2D6 or CYP2C8

Where it's running

  • University of Michigan
    Ann Arbor, Michigan, United States
    Recruiting

Study contacts

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.