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Systemic autoimmune diseases

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https://www.readbyqxmd.com/read/29352427/preserved-in-vitro-immunoreactivity-in-children-receiving-long-term-immunosuppressive-therapy-due-to-inflammatory-bowel-disease-or-autoimmune-hepatitis
#1
Teresa Schleker, Eva-Maria Jacobsen, Benjamin Mayer, Gudrun Strauss, Klaus-Michael Debatin, Carsten Posovszky
BACKGROUND: Children with inflammatory bowel disease (IBD) or autoimmune hepatitis (AIH) are at risk for severe infections. This is partially a result of their chronic disease condition but, moreover, a side effect of their immunosuppressive therapy. Currently, vaccinations with live vaccines are regarded as contraindicated under immunosuppressive therapy, mainly because of concerns about side effects and a lack of data showing an adequate immune reaction. As there is no systematic study on the individual immunoreactivity under immunosuppressive therapy in this patient group, we analyzed the lymphocyte subgroups and immunoreactivity of lymphocytes in children with IBD or AIH with and without immunosuppressive therapy in vitro...
January 19, 2018: Molecular and Cellular Pediatrics
https://www.readbyqxmd.com/read/29351998/detection-of-experimental-and-clinical-immune-complexes-by-measuring-ship-1-recruitment-to-the-inhibitory-fc%C3%AE-riib
#2
Richard J Stopforth, Robert J Oldham, Alison L Tutt, Patrick Duriez, H T Claude Chan, Brock F Binkowski, Chad Zimprich, Dun Li, Philip G Hargreaves, Mei Cong, Venkat Reddy, Maria J Leandro, Geraldine Cambridge, Anja Lux, Falk Nimmerjahn, Mark S Cragg
Fc γ receptors (FcγR) are involved in multiple aspects of immune cell regulation, are central to the success of mAb therapeutics, and underpin the pathology of several autoimmune diseases. However, reliable assays capable of accurately measuring FcγR interactions with their physiological ligands, IgG immune complexes (IC), are limited. A method to study and detect IC interactions with FcγRs was therefore developed. This method, designed to model the signaling pathway of the inhibitory FcγRIIB (CD32B), used NanoLuc Binary Interaction Technology to measure recruitment of the Src homology 2 domain-containing inositol phosphatase 1 to the ITIM of this receptor...
January 19, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29351724/the-role-of-extracellular-matrix-components-in-angiogenesis-and-fibrosis-possible-implication-for-systemic-sclerosis
#3
Vasiliki Liakouli, Paola Cipriani, Paola Di Benedetto, Piero Ruscitti, Francesco Carubbi, Onorina Berardicurti, Noemi Panzera, Roberto Giacomelli
Extracellular matrix (ECM) plays a crucial role in the regulation of both physiological and pathological angiogenesis. ECM homeostasis and function is ensuring by the tightly regulation of the different ECM components including, collagens, proteoglycans and a variety of different glycoproteins. An altered expression of the above ECM molecules as well as an imbalance between the action of matrix remodeling enzymes and their tissue inhibitors is known to be responsible for impaired angiogenesis and fibrosis. Systemic Sclerosis (SSc) is an autoimmune disease characterized by micro-angiopathy, failure of reparative angiogenesis and excessive fibrosis of the skin and various internal organs, dues to an increased production of ECM...
January 19, 2018: Modern Rheumatology
https://www.readbyqxmd.com/read/29348988/anal-squamous-cell-carcinoma-in-a-patient-with-myasthenia-gravis-is-immunosuppression-the-main-underlying-etiology
#4
Muhammad Masab, Muhammad W Saif
Patients who are immunocompromised by diseases such as human immunodeficiency virus (HIV) infection are more prone to develop some malignancies such as Kaposi's sarcoma and central nervous system (CNS) lymphomas. Historically, anal squamous cell carcinoma (SCC) was also included on the list as an acquired immunodeficiency syndrome (AIDs)-defining cancer.  Similarly, compromised immune disorders including severe immunosuppression, haematologic malignancies, and solid organ transplantation have been identified as important risk factors for the development of anal SCC...
November 15, 2017: Curēus
https://www.readbyqxmd.com/read/29348710/the-protein-tyrosine-phosphatase-nonreceptor-22-ptpn22-r620w-functional-polymorphism-in-psoriasis
#5
Ghaleb Bin Huraib, Fahad Al Harthi, Misbahul Arfin, Sadaf Rizvi, Abdulrahaman Al-Asmari
Background: Psoriasis is a complex autoimmune disease caused by the interaction of genetic and environmental factors. PTPN22 gene polymorphism has been reported to affect psoriasis susceptibility; however, no data are available for Middle Eastern populations. Objective: The aim of this study was to investigate the association of PTPN22 (1858C/T) R620W polymorphism with psoriasis in a Saudi cohort. Methods: Saudi subjects (n = 306) including patients with psoriasis (n = 106) and matched controls (n = 200) were studied for PTPN22 variants using tetra-primer amplification refractory mutation system-polymerase chain reaction method...
2018: Clinical Medicine Insights. Arthritis and Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29345571/targeting-cytosolic-phospholipase-a2%C3%AE-for-novel-anti-inflammatory-agents
#6
Jalal Soubhye, Pierre van Antwerpen, Francois Dufrasne
Group IV cytosolic phospholipase A2 (cPLA2α) plays a critical role in inflammatory processes. It produces arachidonic acid which is the main source of the pro-inflammatory eicosanoids mediators that are important in innate immune system. In some cases, these pro-inflammatory mediators cause damages to the host tissues and therefore promote autoimmune diseases. Consequently, development of potent inhibitors against cPLA2α could improve the therapy of inflammatory diseases. In the last two decades, intense efforts have been done to find potent cPLA2α inhibitors...
January 16, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29345029/high-prevalence-and-functional-effects-of-serum-antineuronal-antibodies-in-patients-with-gastrointestinal-disorders
#7
A Lütt, K Michel, D Krüger, M S Volz, M Nassir, E Schulz, L Poralla, P Tangermann, C Bojarski, M Höltje, B Teegen, W Stöcker, M Schemann, B Siegmund, H Prüss
BACKGROUND: Antineuronal antibodies can be associated with both gastrointestinal (GI) and brain disorders. For example, antibodies against the potassium channel subunit dipeptidyl-peptidase-like protein-6 (DPPX) bind to neurons in the central nervous system (CNS) and myenteric plexus and cause encephalitis, commonly preceded by severe unspecific GI symptoms. We therefore investigated the prevalence of antineuronal antibodies indicative of treatable autoimmune CNS etiologies in GI patients...
January 18, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29344132/aberrant-nlrp3-inflammasome-associated-with-aryl-hydrocarbon-receptor-potentially-contributes-to-the-imbalance-of-t-helper-cells-in-patients-with-acute-myeloid-leukemia
#8
Yan Jia, Chen Zhang, Mingqiang Hua, Min Wang, Ping Chen, Daoxin Ma
Acute myeloid leukemia (AML) is a hematological malignancy in which the immune response serves a pivotal role in progression. Aryl hydrocarbon receptor (AHR) is involved in the modulation of the immune system, particularly in the differentiation of T-helper cell (Th) subsets. Although the NLR family pyrin domain-containing 3 (NLRP3) inflammasome has been implicated as essential in the pathogenesis of autoimmune and inflammatory diseases, the role it serves in the development of AML remains unknown. Therefore, in order to identify and describe the possible roles of AHR, as well as NLRP3 inflammasome, in the pathogenesis of AML and their relationship with Th subsets (Th1 Th22), the present study investigated the mRNA expression levels of AHR and NLRP3 inflammasome molecules in the peripheral blood and bone marrow...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29344060/neuro-ophthalmic-presentation-of-neuro-sweet-disease
#9
Padmaja Sudhakar, Stuart Tobin, William O Connor, Sachin Kedar
Acute febrile neutrophilic dermatosis (Sweet syndrome) is a systemic inflammatory condition usually associated with autoimmune or neoplastic processes and characterised by inflammatory dermatologic lesions such as erythematous plaques and papules associated with fever and leukocytosis. Neurological and ophthalmological involvement is rare. The authors describe an unusual case of Sweet syndrome associated with microscopic polyangiitis presenting with papilloedema, anterior uveitis, and skin rash. Years later, he developed acute posterior multifocal placoid pigment epitheliopathy...
August 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/29344020/a-case-of-immune-thrombocytopenia-as-a-rare-side-effect-of-an-immunotherapy-with-pd1-blocking-agents-for-metastatic-melanoma
#10
Claudia Pföhler, Hermann Eichler, Barbara Burgard, Nathalie Krecké, Cornelia S L Müller, Thomas Vogt
Background: Checkpoint blocking agents such as pembrolizumab or nivolumab may induce a diversity of mostly autoimmune-mediated side effects. These autoimmune phenomena mainly affect ductless glands such as the pituitary gland (hypophysitis), the thyroid gland (thyreoiditis), the skin (vitiligo and rash), the colon (colitis), and the lung (pneumonitis). Furthermore, many other organs or organ systems may be affected. Case Report: This work describes a case of an immune thrombocytopenia that developed or rather became clinically significant shortly after initiation of a systemic therapy with first nivolumab and later pembrolizumab given due to metastatic melanoma...
November 2017: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/29343438/regulation-of-the-immune-response-by-the-aryl-hydrocarbon-receptor
#11
REVIEW
Cristina Gutiérrez-Vázquez, Francisco J Quintana
The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor that is activated by small molecules provided by the diet, microorganisms, metabolism, and pollutants. AhR is expressed by a number of immune cells, and thus AhR signaling provides a molecular pathway that integrates the effects of the environment and metabolism on the immune response. Studies have shown that AhR signaling plays important roles in the immune system in health and disease. As its activity is regulated by small molecules, AhR also constitutes a potential target for therapeutic immunomodulation...
January 16, 2018: Immunity
https://www.readbyqxmd.com/read/29343274/coexistent-sickle-cell-anemia-and-autoimmune-disease-in-eight-children-pitfalls-and-challenges
#12
Valerie Li-Thiao-Te, Florence Uettwiller, Pierre Quartier, Florence Lacaille, Brigitte Bader-Meunier, Valentine Brousse, Mariane de Montalembert
BACKGROUND: Patients with sickle cell disease (SCD) present a defective activation of the alternate complement pathway that increases the risk of infection and is thought to predispose to autoimmune disease (AID). However, coexisting AID and SCD is rarely reported, suggesting possible underdiagnosis due to an overlapping of the symptoms. STUDY DESIGN: Among 603 patients with SCD followed between 1999 and June 2016, we retrospectively searched for patients with coexisting SCD and AID...
January 17, 2018: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/29342965/lipid-based-nanoparticles-as-a-potential-delivery-approach-in-the-treatment-of-rheumatoid-arthritis
#13
REVIEW
Shih-Yi Chuang, Chih-Hung Lin, Tse-Hung Huang, Jia-You Fang
Rheumatoid arthritis (RA), a chronic and joint-related autoimmune disease, results in immune dysfunction and destruction of joints and cartilages. Small molecules and biological therapies have been applied in a wide variety of inflammatory disorders, but their utility as a therapeutic agent is limited by poor absorption, rapid metabolism, and serious side effects. To improve these limitations, nanoparticles, which are capable of encapsulating and protecting drugs from degradation before they reach the target site in vivo, may serve as drug delivery systems...
January 15, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29342510/validation-of-the-social-appearance-anxiety-scale-in-patients-with-systemic-sclerosis-a-scleroderma-patient-centered-intervention-network-cohort-study
#14
Sarah D Mills, Linda Kwakkenbos, Marie-Eve Carrier, Shadi Gholizadeh, Rina S Fox, Lisa R Jewett, Karen Gottesman, Scott C Roesch, Brett D Thombs, Vanessa L Malcarne
OBJECTIVE: Systemic sclerosis (SSc) is an autoimmune disease that can cause disfiguring changes in appearance. This study examined the structural validity, internal consistency reliability, convergent validity, and measurement equivalence of the Social Appearance Anxiety Scale (SAAS) across SSc disease subtypes. METHODS: Patients enrolled in the Scleroderma Patient-centered Intervention Network Cohort completed the SAAS and measures of appearance-related concerns and psychological distress...
January 17, 2018: Arthritis Care & Research
https://www.readbyqxmd.com/read/29342325/the-neuromuscular-complications-of-immune-checkpoint-inhibitor-therapy
#15
REVIEW
Noah A Kolb, Christopher R Trevino, Waqar Waheed, Fatemeh Sobhani, Kara K Landry, Alissa A Thomas, Mike Hehir
Immune checkpoint inhibitor (ICPI) therapy unleashes the body's natural immune system to fight cancer. ICPIs improve overall cancer survival, however the unbridling of the immune system may induce a variety of immune related adverse events. Neuromuscular immune complications are rare but they can be severe. Myasthenia gravis and inflammatory neuropathy are the most common neuromuscular adverse events but a variety of others including inflammatory myopathy are reported. The pathophysiologic mechanism of these autoimmune disorders may differ from that of non-ICPI related immune diseases...
January 17, 2018: Muscle & Nerve
https://www.readbyqxmd.com/read/29341591/the-development-of-benzimidazole-based-clickable-probes-for-the-efficient-labeling-of-cellular-protein-arginine-deiminases-pads
#16
Venkatesh J Nemmara, Venkataraman Subramanian, Aaron Muth, Santanu Mondal, Ari J Salinger, Aaron J Maurais, Ronak Tilvawala, Eranthie Weerapana, Paul R Thompson
Citrullination is the post-translational hydrolysis of peptidyl-arginines to form peptidyl-citrulline, a reaction that is catalyzed by the protein arginine deiminases (PADs), a family of calcium-regulated enzymes. Aberrantly increased protein citrullination is associated with a slew of autoimmune diseases (e.g., rheumatoid arthritis (RA), multiple sclerosis, lupus, and ulcerative colitis) and certain cancers. Given the clear link between increased PAD activity and human disease, the PADs are therapeutically relevant targets...
January 17, 2018: ACS Chemical Biology
https://www.readbyqxmd.com/read/29341125/gut-microbiota-and-probiotics-novel-immune-system-modulators-in-myasthenia-gravis
#17
REVIEW
Elena Rinaldi, Alessandra Consonni, Elena Guidesi, Marina Elli, Renato Mantegazza, Fulvio Baggi
Gut microorganisms (microbiota) live in symbiosis with the host and influence human nutrition, metabolism, physiology, and immune development and function. The microbiota prevents pathogen infection to the host, and in turn the host provides a niche for survival. The alteration of gut bacteria composition (dysbiosis) could contribute to the development of immune-mediated diseases by influencing the immune system activation and driving the pro- and anti-inflammatory responses in order to promote or counteract immune reactions...
January 17, 2018: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/29339316/diagnosis-and-management-of-neuromyelitis-optica-spectrum-disorders-an-update
#18
REVIEW
Alice Bruscolini, Marta Sacchetti, Maurizio La Cava, Magda Gharbiya, Massimo Ralli, Alessandro Lambiase, Armando de Virgilio, Antonio Greco
Neuromyelitis optica (NMO) and Neuromyelitis optica spectrum disorders (NMOSD) are a group of autoimmune conditions characterized by inflammatory involvement of the optic nerve, spinal cord and central nervous system. Novel evidence showed a key role of autoantibodies against aquaporin-4 immunoglobulin G (AQP4 IgG) in the pathogenesis of NMOSD and, recently, new classification and diagnostic criteria have been adopted to facilitate an earlier identification and improve the management of these conditions. Diagnosis of NMOSD is currently based on clinical, neuroimaging and laboratory features...
January 12, 2018: Autoimmunity Reviews
https://www.readbyqxmd.com/read/29338153/association-study-of-cd226-and-cd247-genes-single-nucleotide-polymorphisms-in-iranian-patients-with-systemic-sclerosis
#19
Fatemeh Abbasi, Reza Mansouri, Farhad Gharibdoost, Saeed Aslani, Shayan Mostafaei, Hoda Kavosi, Shiva Poursani, Soheila Sobhani, Mahdi Mahmoudi
CD247 and CD226 play important roles in signaling of lymphocytes. Single nucleotide polymorphisms (SNPs) of genes encoding CD247 and CD226 have been associated with the risk of several autoimmune disorders. This study aimed to evaluate the possible association between CD226 and CD247 genes SNPs and risk of systemic sclerosis (SSc) in Iranian population. Study participants were 455 SSc patients and 455 age, sex and ethnic -matched healthy individuals. Genotyping of rs2056626 and rs763361 at CD247 and CD226 genes, respectively, was carried out using TaqMan MGB-based allelic discrimination real-time PCR...
December 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/29336866/regulatory-mechanisms-of-collagen-expression-by-interleukin-22-signaling-in-scleroderma-fibroblasts
#20
Soichiro Sawamura, Masatoshi Jinnin, Kuniko Inoue, Keitaro Yamane, Noritoshi Honda, Ikko Kajihara, Takamitsu Makino, Shinichi Masuguchi, Satoshi Fukushima, Hironobu Ihn
BACKGROUND: Various cytokines have been indicated to be involved in the pathogenesis of systemic sclerosis (SSc). IL-22 is one of the member of IL-10 cytokine family, and several studies have implicated IL-22 signaling in the pathogenesis of autoimmune diseases. OBJECTIVES: To clarify the role of IL-22 in the regulatory mechanism of ECM expression and to determine the contribution of IL-22 to the phenotype of SSc. METHODS: The effect of IL-22 on ECM expression in normal fibroblasts was determined by using PCR array, real-time PCR and immunoblotting...
December 29, 2017: Journal of Dermatological Science
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