Evidence map›Paper›PMID 34894470›Full record

Trial reportParkinsonism & related disorders2022

A pilot to assess target engagement of terazosin in Parkinson's disease.

Jordan L Schultz, Alivia N Brinker, Jia Xu, Sarah E Ernst, Fariba Tayyari, Adam J Rauckhorst, Lei Liu, Ergun Y Uc, Eric B Taylor, Jacob E Simmering and 3 more

Registry-linked trialOpen access · greenAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Parkinsonism & related disorders, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07464028 (Assessing Target Engagement for Terazosin in Parkinson's Disease), which is not on this map. Cited by 33 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 2 pooled it
1.9field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT07464028 phase2not yet recruitingnot on this mapstarted 2026, after this paper: background citation

Assessing Target Engagement for Terazosin in Parkinson's Disease (TZPD2)

TypeinterventionalSponsorNandakumar NarayananRan2026 to 2031Enrolled120ConditionsParkinson's Disease (PD)ArmsTerazosin 5 MG, Placebo
3 · Its place in the literature

Who cites it

33 citing papers in PubMed, 2 syntheses or guidelines pooled it, 39 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. A Double-Blind, Randomized, Placebo-Controlled Trial of Ursodeoxycholic Acid (UDCA) in Parkinson's Disease.Movement disorders : official journal of the Movement Disorder Society · 2023
    Trial
  5. Review
  6. Review
  7. Glycolysis-enhancing αAlzheimer's research & therapy · 2026
    Article
  8. Review
  9. Review
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Review
  16. Neuroprotection in Parkinson Disease.Neurology and therapy · 2025
    Review
  17. αPharmaceuticals (Basel, Switzerland) · 2025
    Review
  18. Review
  19. GPCR drug discovery: new agents, targets and indications.Nature reviews. Drug discovery · 2025
    Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors at 2 institutions in 2 countries.

Jordan L SchultzDepartment of Psychiatry, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Division of Pharmacy Practice and Sciences, College of Pharmacy, University of Iowa, Iowa City, IA, 52242, USA; Department of Neurology, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA. Electronic address: jordan-schultz@uiowa.edu.
Alivia N BrinkerDepartment of Psychiatry, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA.
Jia XuDepartment of Radiology, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA.
Sarah E ErnstDepartment of Internal Medicine, Pappajohn Biomedical Institute, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Howard Hughes Medical Institute, University of Iowa, Iowa City, IA, 52242, USA.
Fariba TayyariDepartment of Molecular Physiology and Biophysics, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA.
Adam J RauckhorstDepartment of Molecular Physiology and Biophysics, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA.
Lei LiuDepartment of Biochemistry and Molecular Biology, Capital Medical University School of Basic Medicine, Beijing, 100069, China.
Ergun Y UcDepartment of Neurology, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Veteran's Affairs Medical Center, 601 US-6 W, Iowa City, IA, 52246, USA.
Eric B TaylorDepartment of Molecular Physiology and Biophysics, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Pappajohn Biomedical Institute, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA.
Jacob E SimmeringDepartment of Internal Medicine, Pappajohn Biomedical Institute, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Pappajohn Biomedical Institute, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA.
Vincent A MagnottaDepartment of Neurology, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Pappajohn Biomedical Institute, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA.
Michael J WelshDepartment of Neurology, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Department of Internal Medicine, Pappajohn Biomedical Institute, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Department of Molecular Physiology and Biophysics, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Pappajohn Biomedical Institute, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Howard Hughes Medical Institute, University of Iowa, Iowa City, IA, 52242, USA. Electronic address: michael-welsh@uiowa.edu.
Nandakumar S NarayananDepartment of Neurology, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA; Pappajohn Biomedical Institute, Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA. Electronic address: nandakumar-narayanan@uiowa.edu.
University of Iowa · USCapital Medical University · CN

Funding

The University of Iowa Clinical and Translational Science AwardUL1TR002537 · NCATS · UNIVERSITY OF IOWA · PI HANSEN, MARLAN R, WINOKUR, PATRICIA · 2018 to 2022
$20.0M
University of Iowam - Whole Body 7T MRI ScannerS10RR028821 · NCRR · UNIVERSITY OF IOWA · PI MAGNOTTA, VINCENT A · 2010 to 2010
$8.0M
Investigating Autonomic Dysfunction as an Early Pathologic Feature of Huntington’s DiseaseK23NS117736 · NINDS · UNIVERSITY OF IOWA · PI SCHULTZ, JORDAN · 2021 to 2025
$895k
Howard Hughes Medical InstituteNCATS NIH HHS UL1 TR002537NCRR NIH HHS S10 RR028821NINDS NIH HHS K23 NS117736
6 · The paper itself

Abstract

backgroundImpaired brain energy metabolism is a key feature of Parkinson's disease (PD). Terazosin (TZ) binds phosphoglycerate kinase 1 and stimulates its activity, which enhances glycolysis and increases ATP levels. Preclinical and epidemiologic data suggest that TZ may be neuroprotective in PD. We aimed to assess target engagement and safety of TZ in people with PD.

methodsWe performed a 12-week pilot study in people with PD. Participants were randomized to receive 5 mg TZ or placebo. Participants and study personnel were blinded. We assessed TZ target engagement by measuring brain ATP with

resultsThirteen participants were randomized. Mild dizziness/lightheadedness was more common in the TZ group, and three participants taking TZ dropped out because of dizziness and/or orthostatic hypotension. Compared to the placebo group, the TZ group had a significant increase in the ratio of βATP to inorganic phosphate in the brain. The TZ group also had a significant increase in blood ATP levels compared to the placebo group (p < 0.01).

conclusionsThis pilot study suggests that TZ may engage its target and change ATP levels in the brain and blood of people with PD. Further studies may be warranted to test the disease-modifying potential of TZ.

Indexed as

Parkinson DiseaseAdenosine TriphosphateDizzinessHumansPilot ProjectsPrazosinAdenosine TriphosphatePrazosinTerazosinAlpha-synucleinAnimal modelsGlycolysisMetabolismParkinson's disease

Identifiers

PMID34894470
PMCPMC8862665
OpenAlexW3214783764

What OpenQuestion holds

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.