Autologous Transplantation of Melanocytes for Treatment of Vitiligo Skin
The purpose of this study is to investigate the efficacy and safety of autologous transplantation of melanocytes in patients with vitiligo.
|Study Design:||Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Autologous Transplantation of Melanocytes for Treatment of Vitiligo Skin|
- percentage of repigmentation [ Time Frame: 2 and 4 weeks after transplantation ] [ Designated as safety issue: Yes ]
- stability of the achieved repigmentation [ Time Frame: 6 months after transplantation ] [ Designated as safety issue: Yes ]
|Study Start Date:||February 2009|
|Study Completion Date:||June 2011|
|Primary Completion Date:||April 2011 (Final data collection date for primary outcome measure)|
Experimental: cell transplantation group
Epidermal Cell transplantation in patients with vitiligo
Biological: Melanocyte transplantation
Injection of melanocytes directly in Epidermis
Vitiligo is a pigmentation disorder in which white patches of skin appear on different parts of the body. Histologically it is characterized by absence of melanocytes along the epidermal basal layer.
Using cell suspension with non-cultured melanocytes which injected into blister of depigmented lesion, a success rate of 85% was reported for repigmentation. However there are some limitations in this technique: the induction of blister is limited to several sites of the body, hypo-pigmentation around the recipient area due to cryodamage of peripheral melanocytes and leakage of suspension out of the blister. To reduce these problems, in this study we will inject melanocytes directly to epidermis.
A shaved biopsy specimen (about 1 cm2) is taken from the patient`s normally pigmented area under local anesthesia (lidocaine hydrochloride 20 mg/ml). The specimens are incubated in 0.25% trypsin solution for 15 minutes at 37°C 0.02% EDTA solution for 10 minutes. Then epidermal sheets are gently manipulated with forceps to dissociate the epidermal cells and to yield a cell suspension, followed by treatment with 0.5% trypsin/versene solution at 37C for 3-5 minutes. Well-dispersed cell suspension is aspirated into 1 ml syringes and injected directly in epidermis.
|Iran, Islamic Republic of|
|Tehran, Iran, Islamic Republic of, 1665659911|
|Principal Investigator:||Hossein Baharvand, PhD||Head of Royan stem cell department|
|Principal Investigator:||Saeeid Shafieian, MD||Firoozgar Hospital|
|Study Director:||Nasser Aghdami, MD., PhD||Head of Royan transplantation Lab|