Clinical research study
Thalidomide for the treatment of resistant cutaneous lupus: Efficacy and safety of different therapeutic regimens

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Purpose

Thalidomide is effective for the treatment of severe cutaneous lupus. Our aim was to study the safety and efficacy of different doses of thalidomide in this condition.

Methods

We studied patients with severe cutaneous lupus that was unresponsive to antimalarials, prednisolone, methotrexate, azathioprine, and cyclosporin A. Starting doses of 100 mg daily (n = 16 patients), 50 mg daily (n = 17), or 50 mg on alternate days (n = 15) were compared. The response to thalidomide was categorized as complete remission, partial remission, or no visible improvement. All patients received a baseline electromyogram (EMG) followed by repeat EMG every 3 to 6 months, or sooner if neuropathic symptoms developed.

Results

Forty-eight patients (46 female; mean [± SD] age, 44 ± 12 years; range, 22 to 71 years) with discoid lupus (n = 18), subacute cutaneous lupus (n = 6), or systemic lupus erythematosus with skin involvement (n = 24) were included. The response rate was 81%, including 29 patients (60%) in complete remission and 10 (21%) in partial remission. Nine patients (19%) failed to respond. Thirteen patients (27%) developed peripheral neuropathy, which was EMG-proven in 11, including 4 patients in the 50-mg alternate-day group. Other side effects included drowsiness, constipation or abdominal pain, and amenorrhea. The relapse rate after stopping thalidomide was 67% (26/39). There was no association between a positive response to the drug and either starting doses or cumulative dose. Similarly, no association was found between peripheral neuropathy and the starting or cumulative dose.

Conclusion

Thalidomide is effective for the treatment of severe cutaneous lupus. There were no clear dose-dependent effects. However, the high incidence of neurotoxicity, even at low doses, suggests that it may be most useful as a remission-inducing drug.

Section snippets

Methods

Patients were treated according to clinical need, with prior written informed consent. Female patients were required to have a negative pregnancy test. The diagnosis (biopsy-proven) was discoid lupus erythematosus in 18 patients, subacute cutaneous lupus in 4, and lupus profundus in 2 (for the purposes of analysis, patients with lupus profundus were included in the subacute cutaneous lupus group). Twenty-four patients had SLE with cutaneous disease and fulfilled at least 4 standard diagnostic

Results

All but 2 of the 48 patients were women; their ages ranged from 22 to 71 years (Table 1). The overall clinical response rate was 81% (n = 39 patients), with 29 patients (60%) in complete cutaneous remission and 10 (21%) showing partial remission. There was no significant association between thalidomide dose and response rate (Table 1). When complete and partial remission were considered together, the response rate was greater in those with SLE (92% [22/24]) than in those with subacute cutaneous

Discussion

The efficacy of thalidomide in cutaneous lupus is well established, but there is variation in the literature about its toxicity, possibly because of differences in the patients who were studied or the doses of thalidomide that were used. We examined the efficacy and safety of thalidomide at different doses, in three well-defined patient subgroups of patients. Our response rate (81%) is similar to previous reports, which range from 66%11 to 100%.17, 18 This response rate is quite remarkable,

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