Several therapies are used for the treatment of rareautoinflammatory conditions like cryopyrin-associated periodic fever syndromes (CAPS), hyperimmunoglobulin Dsyndrome (HIDS)/mevalonate kinase deficiency (MKD) and tumour necrosis factor receptor-associated periodic syndrome (TRAPS). However, reviews reporting on treatment outcomes of these therapies are lacking.
A systematic literature review was conducted using Embase, MEDLINE, MEDLINE-In Process and Cochrane databases to identify the randomised/non-randomised controlled trials (RCTs/non-RCTs) and real-world observational studies of CAPS, HIDS/MKD and TRAPS published as full-texts (January 2000-September 2017) or conference abstracts (January 2014-September 2017). Studies with data for ≥1 biologic were included. Studies with <5 patients were excluded.
Of the 3 342 retrieved publications, 72 studies were included (CAPS, n=43; HIDS/MKD, n=9; TRAPS, n=7; studies with ≥2 cohorts, n=13). Most studies were full-text (n=56), published after 2010 (n=56) and real-world observational studies (n=58). Among included studies, four were RCTs (canakinumab, n=2 (CAPS, n=1; HIDS/MKD and TRAPS, n=1); rilonacept, n=1 (in CAPS); simvastatin, n=1 (in HIDS/MKD)). Canakinumab and anakinra were the most commonly used therapies for CAPS and HIDS/MKD, whereas etanercept, canakinumab and anakinra were the most common for TRAPS. The available evidence suggested the efficacy or effectiveness of canakinumab and anakinra in CAPS, HIDS/MKD and TRAPS, and of etanercept in TRAPS; asingle RCT demonstrated the efficacy of rilonacept in CAPS.
Canakinumab, anakinra, etanercept and rilonacept were reported to be well tolerated; however, injection-site reactions were observed frequently with anakinra, rilonacept and etanercept. Data on the use of tocilizumab, infliximab and adalimumab in these conditions were limited; thus, further research is warranted.

This clinical case series describes our experience with the use of Janus kinase 1/2 inhibitor baricitinib in two patients suffering from refractory adult-onset Still\'s disease (AOSD) as well as in one case suffering from AOSD-like autoinflammatory disease in the context of myelodysplastic syndrome. All patients suffered from disease non-responsive to conventional Disease-modifying antirheumatic drugs (DMARDs) as well as biological therapies including interleukin (IL)-1 and IL-6 blockade, relying instead on high daily doses of prednisolone. We also report the first case of Pneumocystis jirovecii infection following baricitinib use.

Familial Mediterranean fever (FMF) is the most common monogenic autoinflammatory disease (AID) worldwide. The disease is caused by mutations in the MEFV gene encoding the inflammasome sensor Pyrin. Clinical diagnosis of FMF is complicated by overlap in symptoms with other diseases, and interpretation of genetic testing is confounded by the lack of a clear genotype-phenotype association for most of the 340 reported MEFV variants. In this study, the authors designed a functional assay and evaluated its potential in supporting FMF diagnosis.
Peripheral blood mononuclear cells (PBMCs) were obtained from patients with Pyrin-associated autoinflammation with an FMF phenotype (n=43) or with autoinflammatory features not compatible with FMF (n=8), 10 asymptomatic carriers and 48 healthy donors. Sera were obtained from patients with distinct AIDs (n=10), and whole blood from a subset of patients and controls. The clinical, demographic, molecular genetic factors and other characteristics of the patient population were assessed for their impact on the diagnostic test read-out. Interleukin (IL)-1β and IL-18 levels were measured by Luminex assay.
The ex vivo colchicine assay may be performed on whole blood or PBMC. The functional assay robustly segregated patients with FMF from healthy controls and patients with related clinical disorders. The diagnostic test distinguished patients with classical FMF mutations (M694V, M694I, M680I, R761H) from patients with other MEFV mutations and variants (K695R, P369S, R202Q, E148Q) that are considered benign or of uncertain clinical significance.
The ex vivo colchicine assay may support diagnosis of FMF and functional subtyping of Pyrin-associated autoinflammation.

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