Melinda Nagy-Vincze

Background: Identifying novel, reliable blood-based biomarkers is essential to better assess disease activity in idiopathic inflammatory myopathies (IIMs). We aimed to determine serum fatty acid binding protein 3 (FABP3) levels in IIM patients and evaluated their correlations with disease activity, muscle strength, and conventional biomarkers. Methods: This cross-sectional study enrolled 80 patients with IIM (49% polymyositis, 51% dermatomyositis) and 47 gender-matched healthy controls. Disease activity was evaluated using the IMACS core set measures, and serum FABP3 levels were determined via ELISA. Results: FABP3 levels significantly correlated with creatine kinase (CK; r = 0.42, p < 0.001), high-sensitive C-reactive protein (hsCRP; r = 0.35, p = 0.002), and physician global disease activity (PhG; r = 0.28, p = 0.013), while showing a strong negative correlation with manual muscle testing (MMT; r = −0.39, p = 0.0005). Conversely, CK and hsCRP failed to correlate with disease activity or muscle strength. Statistical analysis confirmed that FABP3 is an independent predictor of muscle strength, and correlates with PhG better than CK in patients with chronic myositis. Conclusions: FABP3 is a promising biomarker for IIM disease activity, which may enable more effective therapeutic decision-making in clinical practice.

Anti-melanoma differentiation-associated gene 5 (anti-MDA5) antibodies are critical biomarkers in myositis, associated with distinct clinical features and prognosis. This study aimed to evaluate the proportion of anti-MDA5 positivity and compare the diagnostic performance of local immunoblotting (IB) with gold-standard immunoprecipitation (IP). We performed a retrospective analysis of 3272 physician-requested anti-MDA5 IB determinations over a five-year period (2019–2023). A subsequent exploratory pilot study of ten Hungarian patients with myositis was conducted to compare IB results with radiolabeled protein IP. Confirmatory in-house enzyme-linked immunosorbent assay (ELISA) was used to distinguish between 140 kDa bands (anti-MDA5 vs. anti-NXP2). Indirect immunofluorescence (IIF) on HEp-2 cells was also evaluated. In the retrospective cohort, 3.7% (n = 121) of samples were non-negative. Among 64 borderline patients, only one (1.6%) had a definitive diagnosis of dermatomyositis (DM). Conversely, the proportion of confirmed myositis cases was notably higher among patients with strong positive IB results. In our exploratory cross-sectional pilot study, complete concordance between the two assays was observed for negative and strong positive results. Discrepancies were noted in borderline and weak positivity ranges, where anti-MDA5 was not detected by IP; instead, alternative autoantibodies were identified. The three IP-confirmed MDA5 positive samples were all validated by ELISA. The characteristic IIF cytoplasmic staining was identifiable in 2 out of 10 cases (20%). In our cohort, borderline IB cases were frequently potential false positives, highlighting the need for careful clinical evaluation. Borderline and weak results require clinical correlation or confirmatory testing to avoid misdiagnosis.

Central nervous system (CNS) involvement is an extremely rare manifestation in eosinophilic granulomatosis with polyangiitis (EGPA), associated with a poor prognosis. Here we present a case of 50-year-old female patient with long-term asthma treatment who presented initially with extreme eosinophilia (56%) and severe progressive ascending paresis, similar to Guillain–Barré syndrome, leading to tetraplegia. After navigating through diagnostic mazes, the diagnosis of EGPA was established based on eosinophilia, myeloperoxidase anti-neutrophil cytoplasmic antibody (MPO-ANCA) positivity, asthma, eosinophil granulomatosis in the gastrointestinal tract, and severe peripheral nervous system involvement, complicated with rare central nervous granulomas and ischemia. With combined immunosuppressive and immunomodulatory treatment including high-dose corticosteroids, rituximab and intravenous immunoglobulin along with symptomatic treatment and planned rehabilitation over 6 months, our patient recovered gradually from tetraplegia and adverse events such as severe infections and osteoporotic fractures. Now, from a 2-year perspective, we can conclude a successful treatment leading to decrease in all of her symptoms. Due to persistent eosinophilia after steroid tapering, she was switched to mepolizumab maintenance treatment and demonstrated continuous improvement of motor and sensory functions. Thanks to periodically repeated rehabilitation, she became self-sufficient and returned to her previous job. Our case highlights that EGPA patients should be treated in a center of expertise due to the rarity of the disease and complexity of diagnosis and treatment. Careful multidisciplinary cooperation, the huge effort of the patient, and a supportive environment can show a way back from immune-mediated tetraplegia.

Interferon signature is one of the key pathogenic pathways in idiopathic inflammatory myopathies (IIMs), particularly in dermatomyositis (DM). The aim of this study was to analyze Siglec-1, an interferon-inducible receptor, on different monocyte subsets in IIM subtypes and investigate its association with disease activity measures. Siglec-1 expression was measured by 8-color flow cytometry in 62 IIM patients and 10 healthy controls (HC). Disease activity was assessed using the International Myositis Assessment and Clinical Studies (IMACS) core set measures. Active DM patients exhibited significantly higher Siglec-1 mean fluorescence intensity (MFI) compared to inactive subgroups and HCs in every monocyte subset. Intermediate monocytes displayed the highest Siglec-1 expression across all groups and the strongest associations between disease activity markers. Siglec-1 expression on monocyte subsets was strongly associated with global, extramuscular global, constitutional, cutaneous, muscular, and gastrointestinal activity measures, but not with pulmonary, skeletal, and cardiac activities in the DM population. The best indicator of DM global disease activity among the examined biomarkers was Siglec-1 MFI on intermediate monocytes. Siglec-1 on intermediate monocytes correlates strongly with organ-specific clinical and biochemical markers of disease activity; therefore, it is a candidate biomarker for monitoring IIM disease activity. Siglec-1 could be useful in patient selection for interferon-targeted treatments.

Background: Idiopathic inflammatory myopathies (IIMs), also known as myositis, are systemic autoimmune diseases characterized by chronic inflammation affecting the skin, muscles, and internal organs. Besides traditional risk factors and immune-mediated myocarditis, continuous activity of the immune system increases cardiovascular disease (CVD) risk, meaning that cardiovascular events are the leading causes of mortality in IIM patients. Statins are the most widely used lipid-lowering therapies, which reduce cardiovascular risk, but the fear of adverse muscular events inhibits the frequency of use. Methods: Our aim was to assess the CVD risk in a myositis cohort using the SCORE2 prediction system, carotid artery Doppler ultrasound measurement, and biomarkers; recommend individual lipid-lowering treatment; and follow the efficacy and adverse events of therapy in a 6-month treatment period. Results: The study population (80 IIM patients) was a middle-aged, female-dominant myositis cohort with an average disease duration of 9 years and low median global disease activity. Based on the SCORE2 evaluation, 78.8% of patients had medium/high CVD risk, while 73.13% had asymptomatic carotid plaque. After 6 months of adequate lipid-lowering therapy, 37.5% of patients reached a lower CVD risk category, the biomarker levels of atherosclerosis significantly decreased, and no progression in carotid plaques was detected. None of the patients reported an adverse muscular event or IIM relapse. Conclusions: Our findings proved that the CVD risk of patients with myositis is high, but carefully applied lipid-lowering treatment is the key to effective risk reduction. Risk stratification and the recommendation of preventive treatment are the responsibility of the treating physician.

Background: Myasthenia gravis (MG) and idiopathic inflammatory myopathy (IIM) are autoimmune diseases that affect the musculoskeletal system. The association of the two diseases is rare. Their management is different, so it is important to recognize the concomitant presentation. Methods: In this cross-sectional study, we study the presence of CK elevation, myositis-specific and myositis-associated antibodies (MSA/MAA), and vitamin D levels in a cohort of 101 MG patients. Electromyography, limb magnetic resonance imaging (MRI), and, in some cases, muscle biopsy were performed when IIM was suspected. We reviewed the patients’ medical records to access the results of these tests if they had been performed previously. Results: CK elevation was detected in 10 patients (9.9%). We identified one case of anti-Jo-1 antibody-positive polymyositis and two cases of possible myositis. MSA/MAA antibodies were not found in the patients with high CK levels, except for the one with anti-Jo-1-positive IIM. One patient with elevated CK levels had an overlapping muscular dystrophy. MSA/MAA antibodies were detected in 19 patients (18.8%). A total of 37% had high-titer antibodies and concomitant systemic autoimmune diseases, while 63% had low-titer antibodies, most of whom had no systemic autoimmune disease. Low serum vitamin D levels were found in 67.3% of patients. Comparison of myasthenia gravis composite (MGC) scores between patients with low and normal vitamin D levels did not show a statistically significant difference. Conclusions: Our results may raise awareness among neuromuscular specialists caring for MG patients of the possibility of associated myositis or other neuromuscular diseases and the need to assess vitamin D levels. Although deficiency was frequent, its impact on MG severity remains unclear, necessitating further investigation into its immunological relevance.

Background: Idiopathic inflammatory myopathies (IIM) also known as myositis are systemic autoimmune diseases characterized by chronic inflammation affecting the skin, muscles and internal organs. Besides traditional risk factors and immune-mediated myocarditis, continuous activity of the immune system increases cardiovascular diseases (CVD) risk resulting that cardiovascular events are leading causes of mortality in IIM pa-tients. Statins are the most widely used lipid lowering therapies, which reduce cardio-vascular risk, but the fear of muscular adverse events inhibit the frequency of use. Methods: Our aim was to assess the CVD risk in a myositis cohort using the SCORE2 prediction system, carotid artery Doppler ultrasound measurement and biomarkers; recom-mend individual lipid-lowering treatment; follow the efficacy and adverse events of ther-apy in a 6 months’ treatment period. Results: Study population (80 IIM patients) was a middle aged, female dominant myositis cohort with an average disease duration of 9 years and low median global disease activity. Based on the SCORE2 evaluation, 78.8% of patients had medium/high CVD risk as well as 73.13% had asymptomatic carotid plaque. After 6 months of adequate lipid-lowering therapy 37.5% of patients reached lower CVD risk category, the biomarker levels of atherosclerosis significantly decreased and no progression in carotid plaques have been de-tected. None of the patients reported muscular adverse event or IIM relapse. Conclusion: Our findings proved that CVD risk of patients with myositis is high, but carefully applied lipid-lowering treatment is the key to effective risk reduction. Risk strati-fication and recommendation of preventive treatment is the responsibility of treating physician.

Full Papers; Authors: T. Béldi, A. Vincze, B. Miltényi-Szabó, Z. Varga, K. Szabó, Z. Griger, M. Nagy-Vincze

Overlap myositis is a distinct subgroup of idiopathic inflammatory myositis (IIM) with various clinical phenotypes. The aim of this study was to determine the clinical, serological, and genetic features of systemic sclerosis (SSc)‐IIM overlap patients. It was a retrospective study using clinical database of 39 patients, fulfilling both the criteria of SSc and IIM. 56.4% of the patients had limited cutaneous, 43.6% had diffuse cutaneous SSc, whereas 7.7% of the patients had dermatomyositis and 92.3% polymyositis. The two diseases occurred simultaneously in 58.97%, while 10.26% in myositis and 30.77% in scleroderma were initially diagnosed. The frequencies of organ involvement were interstitial lung disease 71.8%, dysphagia 66.7%, cardiac involvement 41%, pulmonary arterial hypertension (PAH) 30.8%, and renal involvement 12.8%, respectively. The presence of human leukocyte antigen (HLA) − DRB1∗03 and DQA1∗051∗01 alleles were significantly higher in the overlap patients than in healthy controls (82.35% vs. 27.54%; p < 0.0001 and 88.24% vs. 30.16; p < 0.0001). Certain clinical parameters, such as fever at diagnosis (41.67% vs. 7.41%, p = 0.0046), cardiac involvement (83.33% vs. 22.22%, p = 0.0008), subcutaneous calcinosis (41.66 vs. 11.11, p = 0.01146), and claw hand deformity (25% vs. 11.11%, p = 0.00016) were significantly associated with the presence of PAH. Upon comparison, the overlap patients and anti‐Jo‐1 positive antisynthetase patients showed similarities in terms of genetic results and major clinical features; however, SSc‐IIM overlap patients could be distinguished with higher erythrocyte sedimentation rate (ESR) level, more frequent presence of Raynaud’s phenomenon (p < 0.0001; OR: 20.00), dysphagia (p < 0.0001; OR: 15.63), and infrequent livedo reticularis (p < 0.01; OR: 0.11). SSc‐IIM overlap myositis is a unique group within IIM‐s possessing characteristic clinical features.

The aim of this study was to determine the clinical, serological, and genetic features of anti-Jo-1 positive antisynthetase patients followed by a Hungarian single centre to identify prognostic markers, which can predict disease phenotypes and disease progression. It was a retrospective study using clinical database of 49 anti-Jo-1 positive patients. 100% of patients exhibited myositis, 73% interstitial lung disease, 88% arthritis, 65% Raynaud’s phenomenon, 43% fever, 33% mechanic’s hand, and 12% dysphagia. We could detect significant correlation between anti-Jo-1 titer and the CK and CRP levels at disease onset and during disease course. HLA DRB1⁎03 positivity was present in 68.96% of patients, where the CK level at diagnosis was significantly lower compared to the HLA DRB1⁎03 negative patients. HLA DQA1⁎0501-DQB1⁎0201 haplotype was found in 58.62% of patients, but no significant correlation was found regarding any clinical or laboratory features. Higher CRP, ESR level, RF positivity, and the presence of fever or vasculitic skin lesions at the time of diagnosis indicated a higher steroid demand and the administration of higher number of immunosuppressants during the follow-up within anti-Jo-1 positive patients. The organ involvement of the disease was not different in HLA-DRB1⁎0301 positive or negative patients who were positive to the anti-Jo-1 antibody; however, initial CK level was lower in HLA-DRB1⁎0301 positive patients. Distinct laboratory and clinical parameters at diagnosis could be considered as prognostic markers.