electronic international standard serial number (EISSN)
To assess whether the immune derangement previously observed in SAPHO syndrome could be linked to variations in blood T(H)1, T(H)2 or T(H)17 lymphocytes frequency. Seven SAPHO patients with a protracted course of the disease were studied ex-vivo for intracellular cytokines production by means of flow-cytometry and compared with matched groups of Psoriatic Arthritis patients and healthy controls. The Kruskal-Wallis test on the median of the three categories showed that there is a significant association between the T(H)17 levels and the category (p value = 0.02474). The mean and variance for the proportion of IL-17 producing CD4+ cells were compared between groups showing significant differences between SAPHO versus PsA subgroup (p = 0.05) and SAPHO versus healthy controls (p = 0.008). Interestingly, activation of T(H)17 axis, but not of T(H)1 and T(H)2, has been found, and can be observed both in patients with different activity of the disease or treated with different drugs. The T(H)17 increase in peripheral blood of our SAPHO subjects resembles the one recently found in patients with different AIDs. Novel therapeutic options in these patients may therefore include IL-17 blockade.