Actinic KeratosisPhase 1NCT01449513
PEP005 Gel - Biological Effects in Actinic Keratosis Assessed by Reflectance Confocal Microscopy
A Phase 1 study testing Ingenol mebutate in people with Actinic Keratosis, run by LEO Pharma at 1 site in Germany.
Trial summary
This trial will be conducted to explore the biological effects in the skin following treatment with PEP005 Gel, 0.05% administered for two consecutive days, assessed by reflectance confocal microscopy. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Actinic Keratosis
- What is being tested?
- Ingenol mebutate
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 24 participants
- Where
- 1 siteGermany
- Study dates
- Sep 2011to May 2012
- Phase
- Phase 1
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Male or female subjects at least 18 years of age
- Subjects with AK lesions and subclinical AK lesions within a contiguous 25 cm2 area on the upper extremity
- Subjects must have a 25 cm2 area of normal skin on the inner upper arm
- Female subjects must be of either:• Non-childbearing potential, post-menopausal, or have a confirmed clinical history of sterility or • Childbearing potential, with a confirmed negative urine pregnancy test prior to exposure.
- Female subjects of childbearing potential must be willing to consent to using high effective methods of contraception
- Ability to follow trial instructions and likely to complete all trial requirements
- Obtained written informed consent prior to any trial-related procedures
Who cannot join
- Location of the selected treatment areas:• Within 5 cm of an incompletely healed wound or infected area of the skin • Within 10 cm of a suspected basal cell carcinoma (BCC) or squamous cell carcinoma(SCC)
- History or evidence of skin conditions other than the trial indication that would interfere with evaluation of the investigational product
- Clinical diagnosis/history or evidence of any medical condition that would expose a subject to an undue risk of a significant AE or interfere with assessments of safety during the course of the trial, as determined by Investigator clinical judgment
- Anticipated need for in-patient hospitalisation or in-patient surgery during the trial period.
- Current participation in any other interventional clinical trial
- Subjects who have received treatment with any non-marketed drug product within the last two months
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- Previous enrolment in this clinical trial
- Prohibited Therapies and/or Medications 2 weeks prior to the Screening visit within 2 cm of selected treatment area:•Cosmetic or therapeutic procedures •Use of acid-containing therapeutic products • Use of topical salves or topical steroids
- Prohibited Therapies and/or Medications: within 4 weeks prior to the Screening visit: • Treatment with immunomodulators, cytotoxic drugs or interferon/interferon inducers,systemic medications that suppress the immune system, or with UVB
- Prohibited Therapies and/or Medications: within 8 weeks prior to the Screening visit: • Treatment with 5-FU, imiquimod, diclofenac, or photodynamic therapy: within 2 cm of the selected treatment areas.
- Use of systemic retinoids
Trial locations and contacts
1 site in 1 country.
About this study
Official title: A Phase 1, Two-stage, Single-centre, Open Label, Within- and Between-subject Comparison Trial to Explore the Biological Effects of PEP005 (Ingenol Mebutate) Gel, 0.05%, Applied Once Daily for 2 Consecutive Days in Subjects With Actinic Keratosis on the Upper Extrem-ity. A Single-arm First Stage Followed by a Two-arm, Parallel Group, Randomized, Placebo (Vehicle) -Controlled Second Stage
This trial will be conducted to explore the biological effects in the skin following treatment with PEP005 Gel, 0.05% administered for two consecutive days, assessed by reflectance confocal microscopy.
- Conditions
- Actinic Keratosis
- Being tested
- Ingenol mebutate, Placebo Gel
- Medical subject headings
- Keratosis, Actinic
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Ingenol mebutateDrug
Also called PEP005
0.05% Ingenol mebutate Gel once daily for 2 consecutive days
Placebo GelDrug
Gel vehicle of PEP005
| Study group | Role | What they receive |
|---|---|---|
| PEP005 Gel 0.05% | Active comparator | active ingredient of PEP005: Ingenol mebutate Receives: Drug: Ingenol mebutate |
| Placebo Gel | Placebo comparator | Vehicle of PEP005 Gel Receives: Drug: Placebo Gel |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by Reflectance Confocal Microscopy (RCM) in actinic keratosis (AK) skin.This RCM imaging technique is a relatively new non-invasive, real-time evaluation method to generate horizontal skin sections at a resolution comparable to routine histology.
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 2
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by Reflectance Confocal Microscopy (RCM) in Sub actinic keratosis (AK) skin.
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 2
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin.
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 2
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
Measured: Baseline to Day 3
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin.
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 3
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 3
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 8
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 8
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 8
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 57
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 57
Change in Degree of Infiltration
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin
The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Measured: Baseline to Day 57
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
Measured: Baseline to Day 2
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin
Measured: Baseline to Day 2
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin
Measured: Baseline to Day 2
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM(Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
Measured: Baseline to Day 3
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin
Measured: Baseline to Day 3
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin
Measured: Baseline to Day 3
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
Measured: Baseline to Day 8
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin
Measured: Baseline to Day 8
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel,0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin
Measured: Baseline to Day 8
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
Measured: Baseline to Day 57
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin
Measured: Baseline to Day 57
Change in Degree of Necrosis
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM in normal skin
Measured: Baseline to Day 57
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted10 Oct 2011 (estimated)
- Study startSep 2011
- Primary completionMay 2012
- Study completionMay 2012
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Actinic KeratosisStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 24 participants (actual)
Sponsor and investigators
- Lead sponsor
- LEO Pharma
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- Eggert Stockfleth, Prof Dr med, Principal investigator, Charite University, Berlin, Germany
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01449513
- Sponsor's protocol ID
- LP0041-03
- Status last verified
- Apr 2016
- First submitted
- 6 Oct 2011
- Last updated
- 7 Mar 2025
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 7 Mar 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 1, Two-stage, Single-centre, Open Label, Within- and Between-subject Comparison Trial to Explore the Biological Effects of PEP005 (Ingenol Mebutate) Gel, 0.05%, Applied Once Daily for 2 Consecutive Days in Subjects With Actinic Keratosis on the Upper Extrem-ity. A Single-arm First Stage Followed by a Two-arm, Parallel Group, Randomized, Placebo (Vehicle) -Controlled Second Stage
- ClinicalTrials.gov ID
- NCT01449513
- Acronym / sponsor ID
- LP0041-03
- Conditions
- Actinic Keratosis
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 24 participants (actual)
- Lead sponsor
- LEO PharmaIndustry (pharma, biotech, devices)
- Study start
- Sep 2011
- Primary completion
- May 2012 (actual)
- Study completion
- May 2012 (actual)
- First posted
- 10 Oct 2011 (estimated)
- Results
- Posted 27 May 2015
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This trial will be conducted to explore the biological effects in the skin following treatment with PEP005 Gel, 0.05% administered for two consecutive days, assessed by reflectance confocal microscopy.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| PEP005 Gel 0.05% | Active comparator | Drug: Ingenol mebutateactive ingredient of PEP005: Ingenol mebutate |
| Placebo Gel | Placebo comparator | Drug: Placebo GelVehicle of PEP005 Gel |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (7 listed)
- Male or female subjects at least 18 years of age
- Subjects with AK lesions and subclinical AK lesions within a contiguous 25 cm2 area on the upper extremity
- Subjects must have a 25 cm2 area of normal skin on the inner upper arm
- Female subjects must be of either:• Non-childbearing potential, post-menopausal, or have a confirmed clinical history of sterility or • Childbearing potential, with a confirmed negative urine pregnancy test prior to exposure.
- Female subjects of childbearing potential must be willing to consent to using high effective methods of contraception
Key exclusion criteria (11 listed)
- Location of the selected treatment areas:• Within 5 cm of an incompletely healed wound or infected area of the skin • Within 10 cm of a suspected basal cell carcinoma (BCC) or squamous cell carcinoma(SCC)
- History or evidence of skin conditions other than the trial indication that would interfere with evaluation of the investigational product
- Clinical diagnosis/history or evidence of any medical condition that would expose a subject to an undue risk of a significant AE or interfere with assessments of safety during the course of the trial, as determined by Investigator clinical judgment
- Anticipated need for in-patient hospitalisation or in-patient surgery during the trial period.
- Current participation in any other interventional clinical trial
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Ingenol mebutateAlso: PEP0050.05% Ingenol mebutate Gel once daily for 2 consecutive days | Drug | PEP005 Gel 0.05% |
| Placebo GelGel vehicle of PEP005 | Drug | Placebo Gel |
Primary outcome
Change in Degree of Infiltration
Time frame: Baseline to Day 2
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by Reflectance Confocal Microscopy (RCM) in actinic keratosis (AK) skin.This RCM imaging technique is a relatively new non-invasive, real-time evaluation method to generate horizontal skin sections at a resolution comparable to routine histology. The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Infiltration
Time frame: Baseline to Day 2
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by Reflectance Confocal Microscopy (RCM) in Sub actinic keratosis (AK) skin. The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Infiltration
Time frame: Baseline to Day 2
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin. The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Infiltration
Time frame: Baseline to Day 3
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
Change in Degree of Infiltration
Time frame: Baseline to Day 3
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin. The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Infiltration
Time frame: Baseline to Day 3
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Infiltration
Time frame: Baseline to Day 8
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Infiltration
Time frame: Baseline to Day 8
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Infiltration
Time frame: Baseline to Day 8
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Infiltration
Time frame: Baseline to Day 57
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Infiltration
Time frame: Baseline to Day 57
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Infiltration
Time frame: Baseline to Day 57
Change from baseline in the degree of infiltration of the epidermis by inflammatory cells following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin The degree of infiltration of the epidermis by inflammatory cells will be based on "inflammation/small bright cells" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel. The degree of infiltration of the dermis by inflammatory cells will be based on "inflammatory cells in the dermis" (grading 0-3) as assessed by RCM from baseline across the trial period for the subjects receiving PEP005 Gel.
Change in Degree of Necrosis
Time frame: Baseline to Day 2
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
Change in Degree of Necrosis
Time frame: Baseline to Day 2
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin
Change in Degree of Necrosis
Time frame: Baseline to Day 2
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin
Change in Degree of Necrosis
Time frame: Baseline to Day 3
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM(Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
Change in Degree of Necrosis
Time frame: Baseline to Day 3
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin
Change in Degree of Necrosis
Time frame: Baseline to Day 3
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin
Change in Degree of Necrosis
Time frame: Baseline to Day 8
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
Change in Degree of Necrosis
Time frame: Baseline to Day 8
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin
Change in Degree of Necrosis
Time frame: Baseline to Day 8
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel,0.05% as assessed by RCM (Reflectance Confocal Microscopy) in normal skin
Change in Degree of Necrosis
Time frame: Baseline to Day 57
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in AK (actinic keratosis) skin
Change in Degree of Necrosis
Time frame: Baseline to Day 57
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM (Reflectance Confocal Microscopy) in Sub AK (actinic keratosis) skin
Change in Degree of Necrosis
Time frame: Baseline to Day 57
Change from baseline in the degree of necrosis in the epidermis following treatment with ingenol mebutate gel, 0.05% as assessed by RCM in normal skin
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Mar 2025.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Clinical Trials at LEO PharmaLink provided by the sponsor.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Eggert Stockfleth, Prof Dr med principal investigator
Charite University, Berlin, Germany
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing Ingenol mebutate in people with Actinic Keratosis, run by LEO Pharma at 1 site in Germany.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 7 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 7 Mar 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Germany. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 27 May 2015). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Degree of Infiltration (time frame: Baseline to Day 2). The study lists 24 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Mar 2025.