Algorithm for Treatment of Chronic Spontaneous Urticaria with Omalizumab. / Algoritmo de tratamiento con omalizumab en urticaria crónica espontánea.

BACKGROUND AND OBJECTIVE: Pivotal trials with omalizumab for treatment of chronic spontaneous urticaria (CSU) are generally run over 12 to 24weeks. However, in clinical practice, many patients need longer treatment. In this article, we present an algorithm for treatment with omalizumab. MATERIAL AND METHODS: The consensus document we present is the result of a series of meetings by the CSU working group of "Xarxa d'Urticària Catalana i Balear" (XUrCB) at which data from the recent literature were presented, discussed, compared, and agreed upon. RESULTS: Treatment with omalizumab should be initiated at the authorized dose, and is adjusted at 3-monthly intervals according to the Urticaria Activity Score Over 7days, the Urticaria Control Test, or both. CONCLUSIONS: The algorithm proposed is designed to provide guidance on how to adjust omalizumab doses, how and when to discontinue the drug, and how to reintroduce it in cases of relapse.

Diagnosis of tuberculosis infection by interferon-gamma release assays in patients with psoriasis.

OBJECTIVE: In this study, we have performed a direct comparison between both T-cell based assays (QFN-G-IT and T-SPOT.TB) and TST in patients with psoriasis taking different immunosuppressant drug-regimens. METHODS: We have prospectively studied 103 patients with moderate-to-severe psoriasis who required latent tuberculosis infection (LTBI) screening before starting systemic immunosuppressive treatment or during its sustained use. RESULTS: Overall number of positive results was 16.5%, 17.5% and 8.7% using T-SPOT.TB, QFN-G-IT and TST, respectively. Differences in the percentage of positive results between TST with T-SPOT.TB and QFN-G-IT were significant (p = 0.005 and p = 0.008, respectively). A total of 24.3% of the subjects enrolled were positive for at least one of the three tests performed. Sixteen patients with negative TST (17%) were positive for one of the two IGRAs. We obtained seven indeterminate results by T-SPOT.TB and two by QFN-G-IT. Seven patients with negative TST presented indeterminate results by either of two IFN-γ assays. Positive TST, T-SPOT.TB and QFN-G-IT results were not affected by clinical therapeutic profile. CONCLUSIONS: Our results reveal that in vitro assays are useful methods for LTBI diagnosis in patients with psoriasis, suggesting that they might be less influenced by immunosuppression than TST.

Body mass index in patients with moderate-to-severe psoriasis in Spain and its impact as an independent risk factor for therapy withdrawal: results of the Biobadaderm Registry.

BACKGROUND: There are few data on the prevalence of obesity in the general psoriasis population and on the real impact of obesity on the management of psoriasis patients in the clinical setting. OBJECTIVES: To evaluate the prevalence of overweight and obesity in patients with moderate-to-severe psoriasis compared to the general population and to assess the relationship between Body Mass Index (BMI) and the risk of discontinuing treatment. METHODS: Patients registered on Biobadaderm, a prospective registry, were grouped according the different categories of BMI and compared to the general Spanish population. Drug survival was analysed considering only drug withdrawal due to lack of effectiveness, remission and adverse events. RESULTS: A total of 1162 moderate-to-severe psoriasis patients on systemic conventional or biological treatment were recruited. The prevalence of obesity was found to be significantly higher in psoriasis patients than in the general Spanish population (P < 0.001). In multivariate analysis a 5-unit increase in BMI, similar to a change in BMI category from normal weight to overweight and from overweight to obesity, was associated with a 12% increased risk of discontinuing therapy due to lack of effectiveness (HR 1.12, 95% CI: 1.01-1.24) and with a 17% increased risk of having an adverse event (HR 1.17, 95% CI: 1.02-1.36), both independently of the drug used. CONCLUSIONS: Patients with moderate-to-severe psoriasis had a higher prevalence of obesity than the general population. Increased BMI was associated with an increased risk of treatment discontinuation due to lack of effectiveness and a higher risk of adverse events.

Pityriasis rubra pilaris-like reaction induced by imatinib.

Imatinib, a kinase inhibitor, is currently approved for the treatment of chronic myeloid leukaemia, gastrointestinal stromal tumours (GIST), and other malignant conditions such as dermatofibrosarcoma protuberans. Treatment with imatinib is generally well tolerated, but some cutaneous adverse events (AEs), such as exanthematous papular eruptions and Stevens-Johnson syndrome have been reported. We report a case of a pityriasis rubra pilaris (PRP)-like eruption associated with this drug. Although cutaneous AEs associated with imatinib are relatively common (up to 69% of cases), no previous cases of PRP-like eruptions related to this drug have been described previously, to our knowledge.

Interferon γ assays in the diagnosis of tuberculosis infection in psoriasis patients who are candidates for biologic therapies.

Although there is no doubt that biologic agents are an effective alternative for the treatment of moderate and severe psoriasis, anti-tumor necrosis factor α therapy has been associated with reactivation of latent tuberculosis infection. Tuberculin skin testing (TST) is used to diagnose tuberculosis infection but it has low specificity in patients who have received the Mycobacterium bovis BCG vaccine and low sensitivity in patients with altered cell-mediated immunity. In vitro assays based on the detection of interferon γ released by T cells stimulated by specific Mycobacterium tuberculosis antigens have emerged as an option for the diagnosis of tuberculosis infection. The results to date show that they are a viable alternative to TST thanks to their higher specificity and sensitivity. Furthermore, these assays are also proving to have high negative predictive value, meaning that we might be able to use them without TST in the short to medium term.

Interferon γ Assays in the Diagnosis of Tuberculosis Infection in Psoriasis Patients Who Are Candidates for Biologic Therapies. / Técnicas basadas en la detección de IFN-γ en el diagnóstico de la infección tuberculosa en pacientes con psoriasis candidatos a terapias biológicas.

Although there is no doubt that biologic agents are an effective alternative for the treatment of moderate and severe psoriasis, anti-tumor necrosis factor α therapy has been associated with reactivation of latent tuberculosis infection. Tuberculin skin testing (TST) is used to diagnose tuberculosis infection but it has low specificity in patients who have received the Mycobacterium bovis BCG vaccine and low sensitivity in patients with altered cell-mediated immunity. In vitro assays based on the detection of interferon γ released by T cells stimulated by specific Mycobacterium tuberculosis antigens have emerged as an option for the diagnosis of tuberculosis infection. The results to date show that they are a viable alternative to TST thanks to their higher specificity and sensitivity. Furthermore, these assays are also proving to have high negative predictive value, meaning that we might be able to use them without TST in the short to medium term.