Related Experiment Videos
Combined methotrexate-PUVA therapy in the treatment of psoriasis
Abstract:
Thirty patients with psoriasis were treated with a 3-week course of methotrexate followed by a combination of PUVA therapy and methotrexate. When lesions cleared to less than 1% UVA-exposed body involvement, the methotrexate was stopped and PUVA therapy alone was used as maintenance therapy. This protocol achieved clearance of disease in twenty-eight of the thirty patients in a mean of 5.7 (+/- 1.0) weeks, with 9.3 (+/- 3.0) exposures to PUVA therapy and a final UVA radiation dose at clearance of 6.2 (+/- 2.5) J/cm2. The mean total dose of methotrexate was 93.0 mg (range, 67.5-127.5 mg). The only significant adverse effect seen was prolonged phototoxicity in eight patients. By reducing the total cumulative exposure dose of PUVA therapy, this treatment may reduce long-term side effects.
Insights
This study shows that combining methotrexate with PUVA therapy effectively treats psoriasis, clearing disease in most patients. This approach may reduce long-term side effects by lowering PUVA exposure.
Area of Science:
- Dermatology
- Phototherapy
- Pharmacology
Background:
- Psoriasis is a chronic inflammatory skin condition.
- Methotrexate and PUVA therapy are established treatments for psoriasis.
- Optimizing treatment protocols can improve efficacy and reduce side effects.
Purpose of the Study:
- To evaluate a sequential treatment protocol for psoriasis combining methotrexate and PUVA therapy.
- To determine the efficacy and safety of this combined approach.
- To assess the potential for reducing cumulative PUVA exposure.
Main Methods:
- Thirty patients with psoriasis received an initial 3-week course of methotrexate.
- This was followed by combination therapy with PUVA and methotrexate.
- Maintenance therapy involved PUVA alone once disease clearance was achieved.
Main Results:
- Twenty-eight out of thirty patients achieved disease clearance.
- Clearance occurred in a mean of 5.7 weeks with 9.3 PUVA exposures.
- The mean final UVA dose was 6.2 J/cm², with prolonged phototoxicity in 8 patients.
Conclusions:
- The sequential methotrexate and PUVA protocol is effective for psoriasis clearance.
- This regimen may allow for reduced cumulative PUVA exposure, potentially lowering long-term risks.
- Further research into optimizing phototherapy dosing is warranted.