Description

Depending on the type, extent, and duration of vitiligo, conventional medical therapies such as topical and systemic corticosteroids, topical immunomodulators, and phototherapy are not always successful, and repigmentation is often incomplete. Acral vitiligo as well as vitiligo over friction sites as elbows and knees are resistant to treatment including surgical procedures. Relatively less melanocyte density as well as higher chances of koebnerization over these friction and injury prone anatomical sites were among the suggestions for poor response to treatment. It was also found that melanocyte growth and migration in acral vitiligo is hindered by several factors such as decreased MMP9, MMP2, c-kit and MHCII expression, together with higher expression of antimelanogenic factors as tenascin and DKK1. Non-cultured epidermal cellular suspension (NCES) is a cellular grafting technique, whose major advantage is permitting treatment of affected skin surface area up to 10 times larger than the donor area without culturing. Methotrexate is an antifolate drug, that decreases the number of T cells. Studies showed that methotrexate has a positive effect on the stabilization of vitiligo. Combined treatment with phototherapy allows better and faster repigmentation than phototherapy alone. Systemic drugs have been previously used perioperatively in vitiligo surgery. Oral betamethasone has been previously used in the peri surgical period and was reported to increase the chances of complete repigmentation in large vitiliginous lesions as activity at the cellular level is still plausible in spite of clinical stability. The aim of this study is to assess whether adding methotrexate therapy to NCES in the peri surgical period would improve repigmentation in acral vitiligo and other resistant sites.

• Inclusion criteria:
  • Patients with non-segmental vitiligo (NSV) with acral or resistant lesions over the elbows and knees, that has not responded to conventional treatment
  • Stability for ≥ 1 year
  • Age ≥18 years
  • Lack of topical treatment for at least 1 month prior to surgery and systemic treatment for at least 3 months prior to surgery.
• Exclusion criteria:
  • Non acral NSV responsive to conventional treatment modalities
  • Active vitiligo; new lesions, expansion of old lesions, confetti like lesions, ill-defined edges or koebnerization in \< 1 year
  • Age \< 18 years.
  • Pregnant females.
  • Patients with hematologic, hepatic, renal disease or chronic infection.
  • Topical treatment in the past month and systemic treatment in the past 3 months.
• Methodology in details:
• forty lesions in patients with stable vitiligo will be recruited (20 size and region matched lesions per group). An informed written consent will be obtained from patients.
• Patients will be randomized using a computer generated list to one of the two groups which are age and sex matched:

Group A will undergo None cultured epidermal suspension (NCES) without methotrexate.

Group B will receive methotrexate 15 mg/week for 3 months prior to NCES and for 3 months afterwards.

Clinical assessment:

Baseline assessment will include assessing any pigmentation within the patch to be transplanted using the VESTA score and its surface area using point counting technique.

Standardized photographs will be taken at initial assessment, and by the end of the study period after 3 months.

Under aseptic precautions and local anesthesia, a Thiersch graft about one-third the size of the recipient area will be harvested from the donor site (usually upper thigh/ buttocks). The skin graft will be transferred to trypsin-EDTA solution and incubated at 37 °C for 20-30 minutes to separate epidermis from the dermis and then washed with PBS. The tissue will be teased gently with sterile forceps to release epidermal cells from the trypsin digested graft. The white dermis will be removed, and the suspension will be centrifuged at 1000g for 5-10 minutes and the supernatant will be discarded.

Under strict asepsis, the recipient vitiliginous areas will be anesthetized followed by fractional laser CO2 resurfacing, using dot mode off resurfacing at a power of 18-20 W, dwell time 1,500-2000 milliseconds (DEKA, Florence, Italy). One to three passes will be performed until the epidermis is removed uniformly. Then, the NCES will be applied and uniformly spread. It will be covered with a dry collagen sheet followed by sterile surgical pad and tegaderm.

The area will be immobilized after bandaging and the patient will be advised to restrict movement at the operated site.

Patients will start a 1-week course of antibiotics. Dressings will be removed after 1 week, and patients will start topical PUVA hand and feet, 3 times per week for 3 months.

Patients will be followed up monthly for 3 months following the first visit at 1 week.

Both qualitative and quantitative assessment will be done after 3 months of PUVA Hand and feet. Qualitatively, blinded physician assessment of repigmentation as well as color match will be done based on baseline photographs. Quantitatively, point counting method as well as VESTA score will be used as well to assess the surface area of the residual depigmented area and degree of repigmentation respectively.