RecruitingPhase 1Phase 2NCT03526159

Gentamicin for Junctional Epidermolysis Bullosa

A Pilot Study of the Restoration of Functional Laminin 332 in JEB Patients With Nonsense Mutations After Topical and Intravenous Gentamicin Treatment


Sponsor

University of Southern California

Enrollment

6 participants

Start Date

Jun 1, 2018

Study Type

INTERVENTIONAL

Conditions

Summary

Herlitz junctional epidermolysis bullosa (H-JEB), an incurable, fatal, inherited skin disease, is caused by loss-of-function mutations in the LAMA3, LAMB3 or LAMC2 genes, resulting in loss of laminin 332 and poor epidermal-dermal adherence. Eighty percent of H-JEB patients have LAMB3 mutations and about 95% of these are nonsense mutations. The investigators recently demonstrated that gentamicin readily induced nonsense mutation readthrough and produced full-length laminin beta3 in several nonsense mutations tested. Importantly, the gentamicin-induced laminin beta3 restored laminin 332 assembly, secretion, and deposition into the dermal-epidermal junction (DEJ). Newly induced laminin 332 reversed abnormal H-JEB cellular phenotypes. Herein, the investigators propose the first clinical trial of gentamicin (by topical and intravenous administration) in JEB patients with nonsense mutations. The milestones will include restored laminin 332 and hemidesmosomes at the DEJ, improved wound closure, and the absence of significant gentamicin side effects.


Eligibility

Plain Language Summary

Simplified for easier understanding

This study tests whether gentamicin — an antibiotic that has a lesser-known ability to help cells "read through" certain genetic errors — can improve skin healing in patients with junctional epidermolysis bullosa (JEB), a rare and severe genetic skin disorder. JEB is caused by mutations in genes like LAMB3 that affect proteins holding the skin's layers together. The result is extremely fragile skin that blisters at the slightest touch. When the mutation is a specific type called a "nonsense mutation," gentamicin may allow the body to partially override the genetic error and produce more of the needed protein, potentially reducing blistering. The study is open to JEB patients of any age who have nonsense mutations in the LAMB3 gene. It focuses specifically on patients where the gentamicin approach is scientifically most likely to work. You may be eligible if: - You have been diagnosed with junctional epidermolysis bullosa (JEB) - You have a nonsense mutation in the LAMB3 gene in one or both copies You may NOT be eligible if: - Your JEB is not caused by a nonsense mutation in LAMB3 - You have a known hearing impairment - You have known kidney problems - You are allergic to aminoglycoside antibiotics (like gentamicin) or sulfate compounds - You are pregnant Talk to your doctor to see if this trial is right for you.

This summary was AI-generated to explain the trial in plain language. It is not medical advice. Always discuss eligibility with your doctor before enrolling in a clinical trial.

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Interventions

DRUGGentamicin Sulfate

Gentamicin (formulated as gentamicin sulfate) is a well-known, well-characterized antibiotic that has been used for four decades as a treatment against gram negative bacteria. It, like other aminoglycoside antibiotics, has the well documented added potential to facilitate readthrough of premature termination codons in eukaryotic cells and organisms.


Locations(1)

University of Southern California

Los Angeles, California, United States

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NCT03526159


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