Dystrophic Epidermolysis Bullosa Clinical Trial
Official title:
Bicentric, Open and Pilot Study Evaluating the Efficiency and the Tolerance of the Photodynamic Therapy in the Treatment of Epidermal Dysplasia for Patients Affected by Hereditary Dystrophic Epidermolysis Bullosa
The hereditary dystrophic epidermolysis bullosa are genodermatosis responsible of a poor
adhesion of the epidermis to the dermis pulling a large mucocutaneous fragility and
recurrent spontaneous or posttraumatic bullous detachment. They are caused by mutations in
the COL7A1 gene encoding for the collagen VII.
No curative treatment is avaible. The main cause of patients death is the development of
squamous cell carcinoma, sometimes multiple and paticularly aggressive in repeated healing
part. The photodynamic therapy (PDT) is one of technical reference of multiple actinic
keratoses lesions for adults, which are also pre-epithelioma lesions. The PDT is well
tolerated even by the elderly and requires only a single session.
The main objective of this study is to determine the efficiency of the photodynamic therapy
in the treatment of epidermic dysplasies for patients affected by dystrophic epidermolysis
bullosa (DEB). The secondary objectives are to evaluate the tolerance of this treatment in
terms of pain and healing, and to evaluate the contribution of confocal microscopy in the
diagnosis of epidermal dysplasia for patients affected by hereditary dystrophic
epidermolysis bullosa. The main evaluation criterion is the cutaneous biopsy before and
after (M2) a PDT session of an epidermal dysplasia area. The secondary criteria are the
evaluation of the pain during the PDT session and the healing of the cutaneous lesion at M0,
M2 and M4 (lesion area and healing time) and correlation histology / MC. Each patient with a
suspicious lesion will be biopsied. In case of agreement for this protocol, there will be 1
PDT session followed by a consultation of control at 2 and 4 months after the end of
treatment.
The hereditary dystrophic epidermolysis bullosa are genodermatosis responsible of a poor
adhesion of the epidermis to the dermis pulling a large mucocutaneous fragility and
recurrent spontaneous or posttraumatic bullous detachment. They are caused by mutations in
the COL7A1 gene encoding for the collagen VII.
No curative treatment is avaible. The main cause of patients death is the development of
squamous cell carcinoma, sometimes multiple and paticularly aggressive in repeated healing
part. The early treatment of pre-epithelioma cutaneous lesions to moderate at severe
dysplasia type would undoubtedly allow to improve the prognosis of patients. Because of the
cutaneous fragility of patients, topical treatments such as imiquimod or 5-FU are not
possible. The photodynamic therapy (PDT) is one of technical reference of multiple actinic
keratoses lesions for adults, which are also pre-epithelioma lesions. The PDT is well
tolerated even by the elderly and requires only a single session.
The main objective of this study is to determine the efficiency of the photodynamic therapy
in the treatment of epidermic dysplasies for patients affected by dystrophic epidermolysis
bullosa (DEB). The secondary objectives are to evaluate the tolerance of this treatment in
terms of pain and healing, and to evaluate the contribution of confocal microscopy in the
diagnosis of epidermal dysplasia for patients affected by hereditary dystrophic
epidermolysis bullosa. The main evaluation criterion is the cutaneous biopsy before and
after (M2) a PDT session of an epidermal dysplasia area. The secondary criteria are the
evaluation of the pain during the PDT session and the healing of the cutaneous lesion at M0,
M2 and M4 (lesion area and healing time) and correlation histology / MC. This is a
bicentric, open and pilot study on 5 patients over 18 years affected by hereditary
dystrophic epidermolysis bullosa with epidermal displasia. Carcinomas in situ were excluded
of this study. Each patient with a suspicious lesion will be biopsied. In case of agreement
for this protocol, there will be 1 PDT session followed by a consultation of control at 2
and 4 months after the end of treatment.
Total study duration: 18 months (12 months for inclusions, 4 months for study, 2 months for
data analysis).
;
Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
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