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CompletedNCT01831960Updated Dec 2, 2020Results posted

An Evaluation of the Adrenal Suppression Potential and Pharmacokinetic Properties of CB-03-01 Cream in Subjects With Acne Vulgaris

A Phase 2 interventional study of cortexolone 17α-propionate in Acne Vulgaris, sponsored by Intrepid Therapeutics, Inc.. Completed at 3 sites in United States. Open to participants aged 12 Years and older. Per ClinicalTrials.gov, last updated 2020-12-02.

Sponsored by Intrepid Therapeutics, Inc. · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
42
Allocation
Not applicable
Ages
12 Years and older
Sex
All
01

Study summary

This study is designed to determine the hypothalamic-pituitary-adrenal (HPA) axis suppression potential and pharmacokinetic (PK) properties of CB-03-01 Cream, 1%, applied every twelve hours for two weeks, in subjects with acne vulgaris ages 12 years or older.

02

Conditions studied

  • Acne Vulgaris

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Keywords

  • Cassiopea
  • clascoterone
  • cortexolone 17α-propionate
  • anti-androgen
  • CB-01-03
03

In context

Acne Vulgaris

729 studies on the registry are indexed under Acne Vulgaris; 85 are open to participants now.

This study's enrollment of 42 is below the median of 68 across 627 interventional studies indexed under Acne Vulgaris.

Browse Acne Vulgaris studies →

Lead sponsor

Intrepid Therapeutics, Inc. is the lead sponsor of 3 studies on the registry; none are open to participants now.

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

04

Who can participate

Ages eligible
12 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Subject has moderate to severe facial acne vulgaris as determined by the Investigator's Global Assessment (IGA) and obvious acne on the chest and/or back at study start.
  • Subject has facial acne vulgaris (including the nose) with a minimum number of inflammatory lesions (papules, pustules, and nodules/cysts) and a minimum number of non-inflammatory lesions (open and closed comedones) at study start.
  • Females must be post-menopausal, surgically sterile or using highly effective birth control methods with a negative urine pregnancy test (UPT) at study start.
  • Subject must be in general good health in the opinion of the investigator, with normal renal function, based on screening physical examination, medical history, and clinical laboratory values.

Exclusion criteria

Exclusion Criteria:

  • Subject is pregnant, lactating, or is planning to become pregnant during the study.
  • Subject is 12-20 years of age and has a Body Mass Index (BMI) for age percentile > 85%.
  • Subject is > 20 years of age and has a BMI > 32.0 kg/m2.
  • Subject has used tobacco, smoking cessation products, or products containing nicotine within three months prior to study start.
  • Except for the use of contraceptives, subject has used any prescription drug or herbal product within 14 days prior to dosing, any non-prescription drug or vitamin or mineral supplements within 7 days prior to study start; any known enzyme-inducer, enzyme-inhibitor, or reported chronic exposure to enzyme-inducers such as paint solvents or pesticides within 30 days of study start.
  • Subject has used topical anti-acne medications containing retinoids such as tazarotene, adapalene or tretinoin, within four weeks of study start.
  • Subject has used the following systemic anti-acne medications: antibiotics within two weeks of study start, spironolactone within four weeks of study start, or retinoid therapy within three months of study start.
  • Subject has any skin or medical condition, including facial hair that could interfere with the evaluation of the test article or requires the use of interfering topical or systemic therapy.
  • Subject has the need or plans to be exposed to artificial tanning devices or excessive sunlight during the study.
  • Subject has used light treatments, microdermabrasion or chemical peels to the face, chest and back within eight weeks of study start.
  • Subject cannot avoid any type of strenuous exercise (swimming, running, team sports, etc.,) or the use of hot tubs/saunas from study start to the end of the study.
  • Subject has received an investigational drug or been treated with an investigational device within 30 days prior to study start.
  • Subject is currently enrolled in an investigational drug or device study.
  • Subject has used topical corticosteroids (including inhaled and intranasal corticosteroids) within two weeks of study start.
  • Subject has used systemic corticosteroids (including intramuscular and intralesional injections) within four weeks of study start.
  • Subject has an irregular sleep schedule or works night shifts.
  • Subject has experienced significant blood loss within 60 days or has donated plasma within 72 hours prior to study start.
  • Subject tests positive at Screening for human immunodeficiency virus (HIV) or is known to be seropositive for HIV.
  • Subject tests positive at Screening for hepatitis B surface antigen, hepatitis C antibody or has a history of a positive result.
  • Subject had major surgery within 30 days prior to study start or plans to have surgery during the study.
  • Subject has participated in a previous CB-03-01 study.
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
42 participants (actual)

Study arms

  • Experimental
    Cortexolone 17α-Propionate

    Topical cream, 1.0% concentration, applied every twelve hours

    Drug: cortexolone 17α-propionate

Interventions

  • Drugcortexolone 17α-propionate

    Also known as: CB-03-01, clascoterone (USAN, INN)

06

What researchers measure

Primary outcomes

  1. Change in HPA Axis Response to Cosyntropin

    Measurement of serum cortisol concentrations after stimulation of the adrenal cortex with cosyntropin injection (Cosyntropin Stimulation Test - CST). Prior to CST, a pre-CST blood sample is taken between 7AM to 9AM. Thirty minutes after CST, a post-CST blood sample is collected. HPA axis suppression is defined as a post-stimulation serum cortisol level ≤ 18 μg/dL at Day 14.

    Time frame: Baseline and Day 14

  2. PK Profiles (Cmax) of Cortexolone 17α-propionate

    Max concentration (Cmax) of cortexolone 17α-propionate in plasma following the first application (i.e., Day 1, 0-12 hours) and last application (i.e., Day 14, 0-12 hours).

    Time frame: Baseline and Day 14

  3. PK Profiles (AUC) of Cortexolone 17α-propionate

    Area under the plasma concentration curve (0-12 hours) of cortexolone 17α-propionate at baseline (i.e., Day 1, after first application \[0-12 hours\]) and at Day 14 (i.e., Day 14, after last application \[0-12 hours\]).

    Time frame: Baseline and Day 14

  4. PK Profiles (Cavg) of Cortexolone 17α-propionate

    Average concentration of cortexolone 17α-propionate in plasma calculated as the ratio of the AUC(0-12 hours) and the dosing interval (i.e., 12 hours) at baseline (i.e., Day 1, after first application) and at Day 14 (after last application).

    Time frame: Baseline and Day 14

07

Results

Posted Nov 17, 2020

Participant flow

Participant flow — Overall Study
MilestoneCortexolone 17α-Propionate (Cohort 1)Cortexolone 17α-Propionate (Cohort 2)
Started2022
Completed2022
Not completed00

Outcome measures

PrimaryChange in HPA Axis Response to Cosyntropin

Measurement of serum cortisol concentrations after stimulation of the adrenal cortex with cosyntropin injection (Cosyntropin Stimulation Test - CST). Prior to CST, a pre-CST blood sample is taken between 7AM to 9AM. Thirty minutes after CST, a post-CST blood sample is collected. HPA axis suppression is defined as a post-stimulation serum cortisol level ≤ 18 μg/dL at Day 14.

Time frame:
Baseline and Day 14
Reported as:
Mean · mcg/dL
Change in HPA Axis Response to Cosyntropin
mcg/dLCortexolone 17α-Propionate (Cohort 1)Cortexolone 17α-Propionate (Cohort 2)
Baseline (pre-CST)17.0 ± 5.9816.8 ± 4.71
Baseline (post-CST)27.7 ± 3.4324.6 ± 3.12
Day 14 (pre-CST)18.1 ± 7.0215.4 ± 3.98
Day 14 (post-CST)26.7 ± 5.5622.8 ± 2.99
PrimaryPK Profiles (Cmax) of Cortexolone 17α-propionate

Max concentration (Cmax) of cortexolone 17α-propionate in plasma following the first application (i.e., Day 1, 0-12 hours) and last application (i.e., Day 14, 0-12 hours).

Time frame:
Baseline and Day 14
Reported as:
Mean · ng/mL
PK Profiles (Cmax) of Cortexolone 17α-propionate
ng/mLCortexolone 17α-Propionate (Cohort 1)Cortexolone 17α-Propionate (Cohort 2)
Cmax - Day 1 (ng/mL)3.23 ± 2.013.58 ± 4.30
Cmax - Day 14 (ng/mL)4.46 ± 3.004.61 ± 4.74
PrimaryPK Profiles (AUC) of Cortexolone 17α-propionate

Area under the plasma concentration curve (0-12 hours) of cortexolone 17α-propionate at baseline (i.e., Day 1, after first application \[0-12 hours\]) and at Day 14 (i.e., Day 14, after last application \[0-12 hours\]).

Time frame:
Baseline and Day 14
Reported as:
Mean · hr*ng/mL
PK Profiles (AUC) of Cortexolone 17α-propionate
hr*ng/mLCortexolone 17α-Propionate (Cohort 1)Cortexolone 17α-Propionate (Cohort 2)
AUCτ - Day 122.02 ± 13.6722.55 ± 22.57
AUCτ - Day 1437.14 ± 22.9230.97 ± 24.65
PrimaryPK Profiles (Cavg) of Cortexolone 17α-propionate

Average concentration of cortexolone 17α-propionate in plasma calculated as the ratio of the AUC(0-12 hours) and the dosing interval (i.e., 12 hours) at baseline (i.e., Day 1, after first application) and at Day 14 (after last application).

Time frame:
Baseline and Day 14
Reported as:
Mean · ng/mL
PK Profiles (Cavg) of Cortexolone 17α-propionate
ng/mLCortexolone 17α-Propionate (Cohort 1)Cortexolone 17α-Propionate (Cohort 2)
Cavg - Day 11.84 ± 1.141.88 ± 1.88
Cavg - Day 143.10 ± 1.912.58 ± 2.05

Adverse events

Collected over 14 Days. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Cortexolone 17α-Propionate (Cohort 1)0/20 (0%)0/20 (0%)5/20 (25%)
Cortexolone 17α-Propionate (Cohort 2)0/22 (0%)0/22 (0%)3/22 (13.6%)
Most frequent other events
Most frequent other events
EventCortexolone 17α-Propionate (Cohort 1)Cortexolone 17α-Propionate (Cohort 2)
ACTH stimulation test abnormalInvestigations1/202/22
DiarrhoeaGastrointestinal disorders1/200/22
Application site folliculitisGeneral disorders1/200/22
Upper respiratory tract infectionInfections and infestations1/201/22
EcchymosisSkin and subcutaneous tissue disorders1/200/22
Ear infectionInfections and infestations0/201/22

Baseline characteristics

Forty-two (42) subjects were enrolled into the study across two cohorts dependent upon age: Cohort 1: 20 adult subjects Cohort 2: 22 adolescent (12 to less than 18 years of age) subjects

Age, Continuous
Age, Continuous(years)Cortexolone 17α-Propionate (Cohort 1)Cortexolone 17α-Propionate (Cohort 2)Total
Mean24.4 ± 5.8415.6 ± 1.3319.8 ± 6.02
Sex: Female, Male
Sex: Female, Male(Participants)Cortexolone 17α-Propionate (Cohort 1)Cortexolone 17α-Propionate (Cohort 2)Total
Female151227
Male51015
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Cortexolone 17α-Propionate (Cohort 1)Cortexolone 17α-Propionate (Cohort 2)Total
Hispanic or Latino011
Not Hispanic or Latino202141
Unknown or Not Reported000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Cortexolone 17α-Propionate (Cohort 1)Cortexolone 17α-Propionate (Cohort 2)Total
American Indian or Alaska Native000
Asian101
Native Hawaiian or Other Pacific Islander000
Black or African American101
White172138
More than one race112
Unknown or Not Reported000
08

Study locations

3 sites
  • Northwest Clinical Trials, Inc.
    Boise, Idaho, United States
  • Shideler Clinical Research Center
    Carmel, Indiana, United States
  • Michigan Center for Research Corp.
    Clinton Township, Michigan, United States
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 2, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01831960
Lead sponsor
Intrepid Therapeutics, Inc.
Responsible party
Sponsor
First posted
Apr 15, 2013
Start date
Apr 2013
Primary completion
Nov 2013
Completion
Nov 2013
Results posted
Nov 17, 2020
Last update
Dec 2, 2020

Study contacts

R&D Cassiopea
study director · Cassiopea S.p.A.

Oversight

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

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