CClinicalTrials.gg
CompletedNCT012536553193A1-1103Updated Apr 28, 2011

To Evaluate The Relationship Between Plasma Drug Levels And Receptor Binding In Brain Using PET (Positron Emission Tomography) In Healthy Volunteers

A Phase 1 interventional study of PF-05212365 in Healthy, sponsored by Pfizer. Completed at 3 sites in United States. Open to participants aged 18 Years to 55 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2011-04-28.

Sponsored by Pfizer · Phase 1, Interventional, and Basic science

Phase
Phase 1
Study type
Interventional
Enrollment
6
Allocation
Non-randomized
Ages
18 Years to 55 Years
Sex
All
01

Study summary

The purpose of this study is to evaluate the relationship between plasma drug levels and receptor binding in brain using PET; and to evaluate safety and tolerability after a single administration of PF-05212365 in healthy volunteers

02

Conditions studied

  • Healthy

Keywords

  • Healthy Volunteers
03

In context

Lead sponsor

Pfizer is the lead sponsor of 3,244 studies on the registry; 139 are open to participants now.

Of its 582 completed or terminated interventional studies of FDA-regulated products, 381 (65%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 55 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Healthy male and/or female subjects of nonchildbearing potential between the ages of 18 and 55 years, inclusive

Exclusion criteria

Exclusion Criteria:

  • Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurologic, or allergic disease.
  • History of regular alcohol consumption exceeding 7 drinks/week for females or 14 drinks/week for males (1 drink = 5 ounces (150 mL) of wine or 12 ounces (360 mL) of beer or 1.5 ounces (45 mL) of hard liquor) within 6 months of screening
  • Fulfillment of any of the MRI contraindications on the standard radiography screening questionnaire
05

Study design

Phase
Phase 1
Primary purpose
Basic science
Allocation
Non-randomized
Intervention model
Single group
Masking
None (open label)
Enrollment
6 participants (actual)

Study arms

  • Experimental
    PF-05212365

    Drug: PF-05212365

Interventions

  • DrugPF-05212365

    Single dose of up to 30 mg PF-05212365, delivered as 1 mg, 3 mg, and/or 5 mg on study day 1.

    Also known as: SAM-531

06

What researchers measure

Primary outcomes

  1. Exposure response of 5-HT6 Receptor Occupancy (RO) of PF-05212365 in the striatum of healthy adult subjects

    Time frame: up to 4 days

Secondary outcomes

  1. Number of Participants with Adverse Events as a Measure of Safety and Tolerability

    Time frame: continuous, up to 4 days

  2. Change from baseline in orthostatic blood pressure

    Time frame: Baseline, -5 pre-dose, and 5, 51, and 72 hrs post-dose

  3. Change from baseline in supine blood pressure

    Time frame: Baseline, -2.5, -1.5, -.5 pre-dose, and 2, 3, 4, 48, 49, 50 hrs post-dose

  4. Change from baseline in Singlet ECG

    Time frame: Baseline and 72 hrs post-dose

  5. Clinically relevant levels of standard hemotology (e.g. Hemoglobin, Hematocrit RBC count), chemistry (e.g. BUN, Creatinine, fasting Glucose), and urinalysis (e.g. pH Glucose, Protein).

    Time frame: Baseline and 72 hrs post-dose

  6. Abnormal findings from standard physical examination

    Time frame: Baseline and 72 hrs post-dose

  7. Maximum concentration (Cmax) for PF-05212365 in plasma

    Time frame: up to 4 days

  8. Time at Cmax (Tmax) for PF-05212365 in plasma

    Time frame: up to 4 days

  9. Area under the concentration-time profile from time zero to the time of the last quantifiableconcentration (AUClast) for PF-05212365 in plasma

    Time frame: up to 4 days

  10. Average concentration during the first post-dose PET scan (Cavg (scan 1)) for PF-05212365 in plasma

    Time frame: 2-4 hrs post-dose

  11. Average concentration during the second post-dose PET scan (Cavg (scan 2)) for PF-05212365 in plasma

    Time frame: 48-50 hrs post dose

  12. Change from baseline in orthostatic pulse rate

    Time frame: Baseline, -5 pre-dose, and 5, 51, and 72 hrs post-dose

  13. Change from baseline in supine pulse rate

    Time frame: Baseline, -2.5, -1.5, -.5 pre-dose, and 2, 3, 4, 48, 49, 50 hrs post-dose

  14. Abnormal findings from standard neurological examination

    Time frame: Baseline and 72 hrs post-dose

07

Study locations

3 sites
  • Pfizer Investigational Site
    New Haven, Connecticut 06511, United States
  • Pfizer Investigational Site
    New Haven, Connecticut 06519, United States
  • Pfizer Investigational Site
    New Haven, Connecticut 06520, United States
08

References and documents

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 28, 2011, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01253655
Lead sponsor
Pfizer
Collaborators
Yale University
First posted
Dec 3, 2010
Start date
Nov 2010
Primary completion
Mar 2011
Completion
Mar 2011
Last update
Apr 28, 2011

Study contacts

Pfizer CT.gov Call Center
study director · Pfizer

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Apr 2011. You cannot join it, but the record below documents what was studied.

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