ClinicalTrials.gg
Status unknownNCT04047732Updated Sep 13, 2021

Topical KB105 Gene Therapy for the Treatment of TGM1-deficient Autosomal Recessive Congenital Ichthyosis (ARCI)

A Phase 1/2 interventional study of KB105 in TGM-1 Related Autosomal Recessive Congenital Ichthyosis, sponsored by Krystal Biotech, Inc.. Status unknown at 2 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2021-09-13.

Sponsored by Krystal Biotech, Inc. · Phase 1/2, Interventional, and Treatment

The sponsor has not verified this record recently (last verified Sep 2021), so the status shown — last known as Active, not recruiting — may be out of date.
Phase
Phase 1/2
Study type
Interventional
Enrollment
6
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

This study is an intra-patient comparison of KB105 and placebo-administered Target Areas. The primary objectives of this study are to evaluate safety and Investigator Global Assessment (IGA) scale improvement of topically administered KB105.

Read the detailed description

Up to six adult subjects are planned for the Phase I portion of this study. Subjects are enrolled upon obtaining consent and meeting entry criteria. This study is an intra-patient comparison of KB105 and placebo-administered Target Areas. Patients will be evaluated for safety, and Target Areas will be assessed individually with the IGA and VIIS scales. Target Areas will be imaged and evaluated for safety and efficacy. Subjects will be on-trial for approximately 3.5 months.

02

Conditions studied

  • TGM-1 Related Autosomal Recessive Congenital Ichthyosis

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03

In context

Ichthyosis

33 studies on the registry are indexed under Ichthyosis; 11 are open to participants now.

This study's planned enrollment of 6 is below the median of 26 across 23 interventional studies indexed under Ichthyosis.

Browse Ichthyosis studies →

Lead sponsor

Krystal Biotech, Inc. is the lead sponsor of 18 studies on the registry; 9 are open to participants now.

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

04

Who can participate

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

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

  • Genetic diagnosis of TGM1-deficient ARCI with a null TGM-1 mutation;
  • Clinical diagnosis of lamellar ichthyosis;
  • Age: 18 years old or older;
  • Individual site IGA score of 3 to 4 at the target areas
  • Subject is, in the opinion of the Investigator, able to understand thestudy, cooperate with the study procedures, and is willing to return to the clinic for all required follow-up visits;
  • Except for their moderate-to-severe ARCI, subject is in good general health; and
  • Willing and able to give consent/assent.

Exclusion criteria

Exclusion Criteria:

  • Medical instability limiting ability to travel to the investigative center;
  • Medical illness expected to complicate participation, such as an active infection with: , (as determined by hepatitis B surface antigen screening), (as determined by detection of hepatitis C antibodies or a positive result of hepatitis C);
  • Patient has a physical condition or other dermatological disorder (e.g., atopic, seborrheic, or contact dermatitis, psoriasis, tinea infections, etc.) which, in the Investigator's opinion, might impair evaluation of the Target Areas or which exposes the patient to unacceptable risk by study participation;
  • Pregnant or breast-feeding women, or women planning to become pregnant or to breast-feed. Women of must have a negative urine pregnancy test at the Screening visit and Day 1 visit and must commit to using an acceptable form of during the entire study period, up to three months after last KB105 administration. Women using oral contraception must also have done so for 3 months prior to Baseline or will be willing to use a combination of barrier methods. To be considered not of childbearing potential, women must be for at least 1 year or surgically sterile
  • Known allergy to any of the constituents of the product
  • to local anesthesia (e.g., lidocaine/prilocainecream)
  • Current enrollment in a clinical trial
  • Treatment with an drug or investigational device within 30 days prior to Day 1
  • Male who is not surgically sterile nor willing to use effective forms of contraception from Day 1 until 3 months following the last dose of study drug.
  • Subject is known to be noncompliant or is unlikely to comply with the requirements of the study protocol in the opinion of the Investigator
Terms in these criteria, in plain language(8)

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.

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.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

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 1 / Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
6 participants (estimated)

Study arms

  • Experimental
    Topical KB105

    HSV1-TGM1 vector (KB105)

    Biological: KB105

Interventions

  • BiologicalKB105

    KB105, a replication-incompetent, non-integrating HSV-1 vector expressing human transglutaminase 1 (TGM1) formulated as a topical gel

    Also known as: HSV1-TGM1

06

What researchers measure

Primary outcomes

  1. Safety and tolerability

    Incidence of treatment-emergent adverse events

    Time frame: Up to 12 weeks

  2. Investigator's Global Assessment (IGA) of disease severity

    Improvement of disease severity in the treatment area assessment through Investigator's Global Assessment (IGA)

    Time frame: Up to 12 weeks

Secondary outcomes

  1. Visual Index for Ichthyosis Severity (VIIS) scale, lamellar (L) standard

    Improvement of disease severity in the treatment area through use of the Visual Index for Ichthyosis Severity scale, lamellar (VIIS-L) standard assessment. The VIIS-L is a 4-point visual scale with 1 representing normal skin and 5 representing severe ichthyosis.

    Time frame: Up to 12 weeks

  2. Immunofluorescence microscopy

    Level of transglutaminase 1 in KB105-administered skin as measured by immunofluorescence microscopy

    Time frame: Up to 12 weeks

07

Study locations

2 sites
  • Northwestern University
    Chicago, Illinois 60611, United States
  • Paddington Testing Company, Inc.
    Philadelphia, Pennsylvania 19103, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 13, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04047732
Lead sponsor
Krystal Biotech, Inc.
Responsible party
Sponsor
First posted
Aug 7, 2019
Start date
Aug 27, 2019
Primary completion
Oct 2022 (estimated)
Completion
Mar 2025 (estimated)
Last update
Sep 13, 2021

Oversight

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

Not currently enrolling

This study is status unknown, as verified in Sep 2021. You cannot join it, but the record below documents what was studied.

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