ClinicalTrials.gg
TerminatedNCT04209530Updated Oct 7, 2021Results posted

Impact of CCH Treatment of Buttock and Thigh Cellulite in Adult Women

A Phase 2 interventional study of EN3835 in Cellulite and Edematous Fibrosclerotic Panniculopathy (EFP), sponsored by Endo Pharmaceuticals. Terminated at 1 site in United States. Open to female participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-10-07.

Sponsored by Endo Pharmaceuticals (part of Keenova Therapeutics plc) · Phase 2, Interventional, and Treatment

Why this study was terminated
Study terminated due to COVID-19 impact
Phase
Phase 2
Study type
Interventional
Enrollment
7
Allocation
Not applicable
Ages
18 Years to 50 Years
Sex
Female
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Study summary

This is a single center, open-label, Phase 2a study to assess the photonumeric scale, morphological, and histopathological changes associated with Collagenase Clostridium Histolyticum (CCH) in adult women with moderate or severe Edematous Fibrosclerotic Panniculopathy (EFP).

02

Conditions studied

  • Cellulite
  • Edematous Fibrosclerotic Panniculopathy (EFP)

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03

In context

Cellulite

71 studies on the registry are indexed under Cellulite; 3 are open to participants now.

This study's enrollment of 7 is below the median of 34 across 65 interventional studies indexed under Cellulite.

Browse Cellulite studies →

Lead sponsor

Endo Pharmaceuticals is the lead sponsor of 99 studies on the registry; none are open to participants now.

Of its 16 completed or terminated interventional studies of FDA-regulated products, 14 (88%) have results posted.

First submitted before Endo Pharmaceuticals became part of Keenova Therapeutics plc.

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

04

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
Female
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Have both buttocks or both posterolateral thighs with:

    1. A score of 3 or 4 (moderate or severe) as reported by the investigator using the Clinician-Reported Photonumeric Cellulite Severity Scale (CR-PCSS).
    2. A Hexsel Cellulite Severity Scale (CSS) Subsection A "Number of Evident Depressions" score of >0, and Subsection B "Depth of Depressions" score of 2 )medium depth depression) or 3 (deep depressions)..
  2. Have a minimum of 2 well defined and isolated cellulite dimples.
  3. Be willing to apply sunscreen to the treatment area before each exposure to the sun for the duration of the study (from the Screening Visit through the Day 251/Early Termination Visit).
  4. Be judged to be in good health.
  5. Have a negative pregnancy test.
  6. Be willing and able to cooperate with the requirements of the study.

Exclusion criteria

Exclusion Criteria:

  1. Is from a vulnerable population, as defined by the United States (US) Code of Federal Regulations (CFR) Title 45, Part 46, Section 46.111(b) and other local and national regulations, including but not limited to, employees (temporary, part-time, full time, etc) or a family member of the research staff conducting the study, or of the sponsor, or of the contract research organization, or of the Institutional Review Board (IRB)/Independent Ethics Committee (IEC).
  2. Has a history of sensitivity or allergy to collagenase or any other of CCH.
  3. Has systemic conditions (coagulation disorders, , keloidal scar, abnormal wound healing) that restricts study participation.
  4. Has local (in areas to be treated) conditions (thrombosis, vascular disorder, active infection/inflammation, active cutaneous alteration, tattoo/mole) that restricts study participation.
  5. Has skin laxity or linear undulations on the treatment region (both buttocks or both thighs) that can be effaced by lifting skin.
  6. Requires anticoagulant or antiplatelet medication during the study.
  7. Has used or intends to use any of the local applications/therapies/injections/procedures that restricts study participation.
  8. Has used any form of artificial tanning (sprays, lotions, tanning booth, etc) within the 30 days prior to the first dose of study treatment or plans to use any form of artificial tanning during the study (through the Day 251/Early Termination Visit).
  9. Has a positive test and/or a positive surface antigen (HBsAg) or Hepatitis B core antibody (HBcAb) test at screening.
  10. Has had any surgery, invasive procedure (eg, liposuction), injectable treatment (eg, KYBELLA®) or any similar treatment.
  11. Has a history of keloids, hypertrophied scars, and/or other complications following .
  12. Has any for MRI(implant containing metal, internal metallic object, permanent cosmetics/make-up, claustrophobia, syncope, low blood pressure, epilepsy, asthma, sickle cell disease) that restricts study participation.
  13. Has received any collagenase treatments at any time prior to treatment in this study and/or has received EN3835 or CCH in a previous study for cellulite.
  14. Has previously received treatment with CCH in this clinical study.
  15. Has received treatment with an investigational product within 30 days (or 5 half-lives, whichever is longer) of the Screening Visit.
  16. Is pregnant and/or is providing breast milk or plans to become pregnant and/or to provide breast milk during the course of the study.
  17. Has any other condition(s) that, in the investigator's opinion, might indicate the subject to be unsuitable for the study.
Terms in these criteria, in plain language(7)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Excipients

The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

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

Study arms

  • Experimental
    Buttock & Posterolateral Thigh

    EN3835 up to 1.68 mg (Collagenase Clostridium Histolyticum)

    Drug: EN3835

Interventions

  • DrugEN3835

    Collagenase Clostridium Histolyticum (CCH)

06

What researchers measure

Primary outcomes

  1. The Change From Baseline (Screening) in PR-PCSS

    Patient-Reported Photonumeric Cellulite Severity Scale (PR-PCSS) is a 5-point photonumeric scale rating cellulite severity from "0" (None) to "4" (Severe) from a patient's perspective

    Time frame: Day 71

Secondary outcomes

  1. The Change From Baseline (Screening) in CR-PCSS

    Clinician-Reported Photonumeric Cellulite Severity Scale (CR-PCSS) is a 5-point photonumeric scale rating cellulite severity from "0" (None) to "4" (Severe) from a clinician's perspective

    Time frame: Day 22, Day 43 and Day 71

  2. The Change From Baseline (Screening) in Hexsel Cellulite Severity Scale (CSS)

    Hexsel CSS is a photonumeric scale that looks at 5 key morphologic features of cellulite, each feature is evaluated on a 4-point scale from "0" (Low) to "3" (High)

    Time frame: Day 22, Day 43 and Day 71

  3. MRI Before and After CCH Treatment

    Magnetic Resonance Imaging (MRI) of cellulite before and after CCH treatment

    Time frame: Day 71

  4. Histopathology Before and After CCH Treatment

    Histopathology of biopsies defined by the observation of the biopsied specimen by a trained Pathologist

    Time frame: Day 71

07

Results

Posted Oct 7, 2021

Participant flow

Participant flow — Overall Study
MilestoneButtockPosterolateral Thigh
Started43
Completed00
Not completed43
Withdrew: Terminated due to the major disruption in study visits and protocol assessments due to covid-1942
Withdrew: Withdrawal by subject01

Outcome measures

PrimaryThe Change From Baseline (Screening) in PR-PCSS

Patient-Reported Photonumeric Cellulite Severity Scale (PR-PCSS) is a 5-point photonumeric scale rating cellulite severity from "0" (None) to "4" (Severe) from a patient's perspective

Time frame:
Day 71

No measurements were reported for this outcome.

SecondaryThe Change From Baseline (Screening) in CR-PCSS

Clinician-Reported Photonumeric Cellulite Severity Scale (CR-PCSS) is a 5-point photonumeric scale rating cellulite severity from "0" (None) to "4" (Severe) from a clinician's perspective

Time frame:
Day 22, Day 43 and Day 71

No measurements were reported for this outcome.

SecondaryThe Change From Baseline (Screening) in Hexsel Cellulite Severity Scale (CSS)

Hexsel CSS is a photonumeric scale that looks at 5 key morphologic features of cellulite, each feature is evaluated on a 4-point scale from "0" (Low) to "3" (High)

Time frame:
Day 22, Day 43 and Day 71

No measurements were reported for this outcome.

SecondaryMRI Before and After CCH Treatment

Magnetic Resonance Imaging (MRI) of cellulite before and after CCH treatment

Time frame:
Day 71

No measurements were reported for this outcome.

SecondaryHistopathology Before and After CCH Treatment

Histopathology of biopsies defined by the observation of the biopsied specimen by a trained Pathologist

Time frame:
Day 71

No measurements were reported for this outcome.

Adverse events

Collected over All (Serious and Non-Serious AEs) from Day 1 to Day 265. Non-serious events are listed at a 1% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Buttock0/4 (0%)0/4 (0%)4/4 (100%)
Posterolateral Thigh0/3 (0%)0/3 (0%)3/3 (100%)
Most frequent other events
Most frequent other events
EventButtockPosterolateral Thigh
Injection site bruisingGeneral disorders4/43/3
Injection site painGeneral disorders4/43/3
Injection site discolourationGeneral disorders2/40/3
Injection site massGeneral disorders0/41/3
Wound dehiscenceInjury, poisoning and procedural complications0/41/3
Injection site swellingGeneral disorders1/40/3
Dermatitis contactSkin and subcutaneous tissue disorders1/40/3

Baseline characteristics

Age, Continuous
Age, Continuous(years)ButtockPosterolateral ThighTotal
Mean46.5 ± 5.4638.3 ± 1.9643.0 ± 5.93
Sex: Female, Male
Sex: Female, Male(Participants)ButtockPosterolateral ThighTotal
Female437
Male000
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)ButtockPosterolateral ThighTotal
Hispanic or Latino437
Not Hispanic or Latino000
Unknown or Not Reported000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)ButtockPosterolateral ThighTotal
American Indian or Alaska Native000
Asian000
Native Hawaiian or Other Pacific Islander000
Black or African American000
White437
More than one race000
Unknown or Not Reported000
Skin Category (Fitzpatrick Scale)
Skin Category (Fitzpatrick Scale)(Participants)ButtockPosterolateral ThighTotal
I (Pale white)000
II (Fair)000
III (Darker white)112
IV (Light brown)325
V (Brown)000
VI (Dark brown or black)000
Weight
Weight(Kg)ButtockPosterolateral ThighTotal
Mean74.67 ± 12.83678.32 ± 1.83676.24 ± 9.344
Height
Height(cm)ButtockPosterolateral ThighTotal
Mean163.83 ± 9.390163.41 ± 2.933163.65 ± 6.856
Body Mass Index
Body Mass Index(kg/m^2)ButtockPosterolateral ThighTotal
Mean27.73 ± 1.74429.50 ± 0.30028.49 ± 1.566
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Study locations

1 site
  • Endo Clinical Trial Site #1
    Coral Gables, Florida 33146, United States
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: Yes

Supporting information: Study protocol, Statistical analysis plan

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 7, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04209530
Responsible party
Sponsor
First posted
Dec 24, 2019
Start date
Nov 20, 2019
Primary completion
Jul 23, 2020
Completion
Oct 5, 2020
Results posted
Oct 7, 2021
Last update
Oct 7, 2021

Study contacts

Ashley Dayoub
study director · Endo Pharmaceuticals

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drug tested here: Microbial Collagenase

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