Elias Toubi MD and Howard Amital MD MHA
Massimo Ralli MD PhD, Alessandro Lambiase MD PhD, Marco Artico MD, Marco de Vincentiis MD and Antonio Greco MD
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder characterized by the progressive death of motor neurons leading to fatal paralysis. The causes of ALS remain unknown; however, evidence supports the presence of autoimmune mechanisms contributing to pathogenesis. Although several environmental factors have been proposed, the only established risk factors are older age, male gender, and a family history of ALS. To date, there are no diagnostic test for ALS, and clinicians rely on the combination of upper motor neuron and lower motor neuron signs in the same body region. The aim of this paper was to provide a comprehensive review of current clinical literature with special focus on the role of autoimmunity in ALS, differential diagnosis, and available therapeutic approaches. Current evidence suggests a contribution of the innate immune system in ALS, with a role of microglial cell activation at the sites of neurodegeneration. The median time from symptom onset to diagnosis of ALS is 14 months, and this time estimate is mainly based on specific clinical signs and exclusion of ALS-like conditions. Several therapeutic approaches have been proposed, including immunosuppressive drugs, to reduce disease progression. Riluzole has been established as the only, although modestly effective, disease modifying therapy, extending mean patient survival by 3to 6 months. Recent advances in understanding the pathophysiology mechanisms of ALS encourage realistic hope for new treatment approaches. To date, the cornerstones of the management of patients with ALS are focused on symptom control, maintaining quality of life and improving survival.
Darja Kanduc PhD
Background: Although cross-reactions between Epstein-Barr virus (EBV) and human systemic lupus erythematosus (SLE) autoantigens occur, a complete analysis of the potential EBV peptide cross-reactome has not been performed.
Objectives: To analyze the whole EBV proteome searching for peptides common to SLE-related proteins and endowed with an immunological potential.
Methods: Fifty-one SLE-related proteins were analyzed for hexapeptide sharing with EBV proteome using publicly available databases.
Results: An extremely high number of hexapeptides are shared between 34 human SLE autoantigens and EBV proteins. The peptide sharing mostly occurs with complement components C4 and Interleukin-10 (IL-10).
Conclusion: This study thoroughly describes the EBV vs. SLE autoantigens peptide overlap and powerfully supports cross-reactivity as a major mechanism in EBV-associated SLE etiopathogenesis.
Giacomo Cafaro MD, Elena Bartoloni MD, Alessia Alunno MD PhD, Onelia Bistoni BSc, Sabrina Cipriani PhD, Fabiana Topini PhD and Roberto Gerli MD
Platelets have the ability to influence the immune system and the inflammatory process and may be strongly involved in the whole pathogenic process of chronic inflammatory joint diseases, such as rheumatoid arthritis. They may play a significant role even before the clinical onset of the disease, contributing to the loss of tolerance of the immune system and the induction of autoimmunity. Subsequently, they can interact with the most important cellular players involved in autoimmunity and inflammation, namely innate immunity cells and T cells and eventually contribute to the building of inflammation in the synovium, thus inducing the activation, migration, and proliferation of fibroblasts that eventually lead to joint damage. Due to their peculiar features, studying the behavior of platelets is a challenging task; however, platelets may prove to be valuable therapeutic targets in the future.
Mohammad Adawi MD MHA, Sabbah Firas MD and Arnon Blum MD
Inflammation is the basic mechanism leading to many pathological processes, including degenerative diseases, atherosclerosis, and cancer. We found an interesting link connecting rheumatoid arthritis and atherosclerosis that may explain the high cardiovascular event rate among patients with rheumatoid arthritis, but also may lead to a new way of thinking and a better understanding of atherosclerosis. Rheumatoid arthritis could serve as a model of accelerated atherosclerosis. Understanding the basic mechanisms of rheumatoid arthritis may solve some of the complexity of atherosclerosis.
Laura Andreoli MD PhD, Antía García-Fernández MD, Maria Chiara Gerardi MD and Angela Tincani MD
Rheumatic diseases commonly affect women of childbearing age, when women may be contemplating pregnancy or they discover an unplanned pregnancy. Therefore, specific issues about pregnancy planning and management are commonly encountered in patients during these times. Knowledge of the effect of pregnancy on disease activity is important for counseling. This review summarizes recent data on the course of different rheumatic diseases during pregnancy and the postpartum period. Rheumatoid arthritis and systemic lupus erythematosus are the most commonly investigated diseases. Data are increasing about spondyloarthritis. Sparse data are available for other rheumatic diseases. Despite the differences in these diseases and the various courses these disease take during pregnancy, a common feature is that active maternal disease in the months prior to conception increases the risk of flares during pregnancy, which in turn can lead to adverse pregnancy outcomes. Therefore, maternal and fetal health can be optimized if conception is planned when disease is inactive so that a treatment regimen can be maintained throughout pregnancy.
Paola Di Benedetto PhD, Piero Ruscitti MD, Vasiliki Liakouli MD PhD, Paola Cipriani MD PhD and Roberto Giacomelli MD PhD
Microvascular damage, clinically expressed by Raynaud’s phenomenon, is generally the first symptom of the disease and the injured vascular cells, both endothelial and perivascular, may transdifferentiate to myofibroblasts, thus leading to collagen deposition in the tissue and consequent fibrosis. Systemic sclerosis (SSc, scleroderma) is complex disease characterized by autoimmunity, vasculopathy, and fibrosis. It has been shown that microvascular damage may be the first symptom of SSc. Injured endothelial cells and pericytes may transdifferentiate into myofibroblasts, the cells responsible for fibrosis and collagen deposition in the tissue. Based on these factors, the process of myofibroblast generation may link two pivotal events of SSc: microvascular damage and fibrosis. Understanding the development, differentiation, and function of myofibroblasts is therefore crucial to individuate early pathogenetic events and develop new therapeutic target for SSc, a condition in which no disease-modifying agents are available. The aim of this review was to discuss the possible origins of myofibroblasts in SSc, highlighting the process of endothelial mesenchymal transition and pericytes to myofibroblast transition and to show how these events may contribute to pathogenesis of the disease.