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Clinical and Experimental Immunology

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https://www.readbyqxmd.com/read/28722110/renal-infiltrating-cd11c-cells-are-pathogenic-in-murine-lupus-nephritis-through-promoting-cd4-t-cell-responses
#1
Xiaofeng Liao, Jingjing Ren, Alec Reihl, Tharshikha Pirapakaran, Bharath Sreekumar, Thomas E Cecere, Christopher M Reilly, Xin M Luo
Lupus nephritis (LN) is a major manifestation of systemic lupus erythematosus (SLE) causing morbidity and mortality in 40-60% of SLE patients. The pathogenic mechanisms of LN are not completely understood. Recent studies have demonstrated the presence of various immune cell populations in lupus nephritic kidneys of both SLE patients and lupus-prone mice. These cells may play important pathogenic or regulatory roles in situ to promote or sustain LN. Here, using lupus-prone mouse models, we showed the pathogenic role of a kidney-infiltrating CD11c(+) myeloid cell population in LN...
July 19, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28714582/altered-levels-of-soluble-cd18-may-associate-immune-mechanisms-with-outcome-in-sepsis
#2
Tue Wenzel Kragstrup, Kristian Juul-Madsen, Stig Hill Christiansen, Xianwei Zhang, Jan Krog, Thomas Vorup-Jensen, Anders Gade Kjaergaard
The pathogenesis of sepsis involves a dual inflammatory response, with a hyper-inflammatory phase followed by, or in combination with, a hypo-inflammatory phase. The adhesion molecules LFA-1 (CD11a/CD18) and Mac-1 (CD11b/CD18) support leukocyte adhesion to intercellular adhesion molecules and phagocytosis through complement opsonisation, both processes relevant to the immune response during sepsis. Here, we investigate the role of soluble (s)CD18 in sepsis with emphasis on sCD18 as a mechanistic biomarker of immune reactions and outcome of sepsis...
July 17, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28710878/6-mercaptopurine-modifies-cerebrospinal-fluid-t-cell-abnormalities-in-pediatric-opsoclonus-myoclonus-as-steroid-sparer
#3
Michael R Pranzatelli, Elizabeth D Tate, Tyler J Allison
The purpose was to evaluate the capacity of 6-mercaptopurine (6-MP), a known immunosuppressant, to normalize cerebrospinal fluid (CSF) lymphocyte frequencies in opsoclonus-myoclonus syndrome (OMS) and function as a steroid sparer. CSF and blood lymphocytes were immunophenotyped in 11 children with OMS (without CSF B cell expansion), using a comprehensive panel of cell surface adhesion, activation, and maturation markers by flow cytometry, and referenced to 18 pediatric controls. Drug metabolites, lymphocyte counts, and liver function tests were used clinically to monitoring therapeutic range and toxicity...
July 15, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28708318/current-insights-into-the-role-of-human-%C3%AE-defensins-in-atopic-dermatitis
#4
REVIEW
Panjit Chieosilapatham, Hideoki Ogawa, François Niyonsaba
Antimicrobial peptides or host defense peptides are small molecules that display both antimicrobial activities and complex immunomodulatory functions to protect against various diseases. Among these peptides, the human β-defensins (hBDs) are primarily localized in epithelial surfaces, including those of the skin, where they contribute to protective barriers. In atopic dermatitis skin lesions, altered skin barrier and immune dysregulation are believed to be responsible for reduced hBD synthesis. Impaired hBD expression in the skin is reportedly the leading cause of increased susceptibility to bacterial and viral infection in patients with atopic dermatitis...
July 14, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28708268/screening-protocols-to-monitor-respiratory-status-in-primary-immunodeficiency-disease-findings-from-a-european-survey-and-subclinical-infection-working-group
#5
Stephen Jolles, Silvia Sánchez-Ramón, Isabella Quinti, Pere Soler-Palacín, Carlo Agostini, Benoit Florkin, Louis-Jean Couderc, Nicholas Brodszki, Alison Jones, Hilary Longhurst, Klaus Warnatz, Filomeen Haerynck, Andrea Matucci, Esther de Vries
Many patients with primary immunodeficiency (PID) who have antibody deficiency develop progressive lung disease due to underlying subclinical infection and inflammation. To understand how these patients are monitored we conducted a retrospective survey based on patient records of 13 PID centres across Europe, regarding the care of 1,061 adult and 178 paediatric patients with PID on IgG replacement. The most common diagnosis was common variable immunodeficiency in adults (75%), and hypogammaglobulinaemia in children (39%)...
July 14, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28708252/redundant-and-regulatory-roles-for-tlrs-in-leishmania-infection
#6
REVIEW
Prashant Chauhan, Divanshu Shukla, Debprasad Chattopadhyay, Bhaskar Saha
Toll-like receptors (TLRs) are germ-line encoded, non-clonal innate immune receptors, which are often the first receptors to recognize the molecular patterns on pathogens. Therefore, the immune response initiated by TLRs does have far-reaching consequences on the outcome of an infection. As soon as the cell surface TLRs and other receptors recognize a pathogen, the pathogen is phagocytosed. Inclusion of TLRs in the phagosome results in quicker phagosomal maturation and stronger adaptive immune response, as TLRs influence costimulatory molecules expression and determinant selection by MHC class-II and by MHC class-I for cross-presentation...
July 14, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28707750/arterial-immune-protein-expression-demonstrates-the-complexity-of-immune-responses-in-kawasaki-disease-arteritis
#7
Scott A Cameron, Steven M White, David Arrollo, Stanford T Shulman, Anne H Rowley
BACKGROUND: A more complete understanding of immune-mediated damage to the coronary arteries in children with Kawasaki disease (KD) is required for improvements in patient treatment and outcomes. We recently reported the transcriptional profile of KD coronary arteritis, and here sought to determine protein expression of transcriptionally upregulated immune genes in KD coronary arteries from the first two months after disease onset. METHODS: We examined the coronary arteries of 12 fatal KD cases and 13 childhood controls for expression of a set of proteins whose genes were highly upregulated in the KD coronary artery transcriptome: allograft inflammatory factor 1 (AIF1), interleukin 18 (IL-18), CD74, CD1c, CD20 (MS4A1), Toll-like receptor 7 (TLR7), and Z-DNA binding protein 1 (ZBP1)...
July 14, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28707730/complement-and-contact-system-activation-in-acute-congestive-heart-failure-patients
#8
Chiara Suffritti, Eleonora Tobaldini, Riccardo Schiavon, Silvia Strada, Lorena Maggioni, Satish Mehta, Giulia Sandrone, Edgar Toschi-Dias, Marco Cicardi, Nicola Montano
BACKGROUND: Recent experimental data indicate a pathogenic role of complement activation in congestive heart failure (CHF). Aim of this study was to evaluate contact and complement systems activation in patients hospitalized for an acute episode of CHF. METHODS AND RESULTS: 42 of 80 consecutive patients admitted at our hospital with confirmed diagnosis of acute CHF were enrolled. They underwent blood sampling within 24 hours from admission (T0) and at clinical stability (T1)...
July 14, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28681919/il-9-over-expression-and-th9-polarization-in-systemic-sclerosis-patients
#9
Giuliana Guggino, Marianna Lo Pizzo, Diana Di Liberto, Aroldo Rizzo, Paola Cipriani, Piero Ruscitti, Giuseppina Candore, Maria Caterina Gambino, Guido Sireci, Francesco Dieli, Roberto Giacomelli, Giovanni Triolo, Francesco Ciccia
Th9 cells and IL-9 are involved in the pathogenesis of several autoimmune diseases. The exact role of IL-9 and Th9 cells in patients with Systemic Sclerosis (SSc) has not been yet adequately studied. IL-9, IL-9R, transcription factor PU.1 (PU.1), IL-4, thymic stromal lymphopoietin (TSLP) and TGF-β expression were assessed in skin and kidney biopsies of SSc patients and healthy controls (HC) by immunohistochemistry (IHC). The cellular source of IL-9 was also analyzed by confocal microscopy analysis. Peripheral IL-9-producing cells were also studied by flow cytometry...
July 6, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28677152/significant-augmentation-of-regulatory-t-cell-numbers-occurs-during-the-early-neonatal-period
#10
Seiichi Hayakawa, Norioki Ohno, Satoshi Okada, Masao Kobayashi
Regulatory T cells (Tregs) control immune responses by suppressing various inflammatory cells. Tregs in newborn babies may play an important role in preventing excessive immune responses during their environmental change. We examined the number and phenotype of Tregs during the neonatal period in 49 newborn babies. Tregs were characterized by flow cytometry using cord blood (CB) and peripheral blood (PB) from the early (7-8 days after birth) and late (2-4 weeks after birth) neonatal periods. CD4(+) Foxp3(+) T cells were classified into resting Tregs (CD45RA(+) Foxp3(low) ), activated Tregs (CD45RA(-) Foxp3(high) ), and newly activated T cells (CD45RA(-) Foxp3(low) )...
July 5, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28677145/nerve-growth-factor-regulation-and-production-by-macrophages-in-osteoarthritic-synovium
#11
Shotaro Takano, Kentaro Uchida, Gen Inoue, Masayuki Miyagi, Jun Aikawa, Dai Iwase, Kazuya Iwabuchi, Toshihide Matsumoto, Masashi Satoh, Manabu Mukai, Atsushi Minatani, Masashi Takaso
Nerve growth factor (NGF) functions to modulate osteoarthritis (OA)-associated pain. Although recent studies suggest that tumor necrosis factor (TNF)-α and interleukin (IL)-1β mediate NGF activity in human synovial fibroblasts, the regulation of NGF expression in human synovial macrophages remains unclear. Here, we examined the role of macrophages in the production and regulation of synovial (SYN) NGF in osteoarthritic knee joints by examining the mRNA expression of TNF-α and IL-1β in freshly isolated CD14-positive (macrophage-rich fraction) and CD14-negative cells (fibroblast-rich fraction) in synovial tissue from OA patients by quantitative polymerase chain reaction...
July 5, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28671717/the-effect-of-il-21-and-cd4-cd25-t-cells-on-cytokine-production-of-cd4-responder-t-cells-in-patients-with-myasthenia-gravis
#12
Mahdi Alahgholi-Hajibehzad, Hacer Durmuş, Fikret Aysal, Yeşim Gülşen-Parman, Piraye Oflazer, Feza Deymeer, Güher Saruhan-Direskeneli
Impairment of the suppressive function of regulatory T (Treg) cells was reported in myasthenia gravis (MG). In this study, cytokine-related mechanisms that may lead to the defect of Treg were investigated in patients with anti-acetylcholine receptor antibody positive MG (AChR+MG). Proliferation and cytokine production of responder T (Tresp) cells in response to polyclonal activation were measured in a suppression assay. The effect of IL-21 on suppression was evaluated in vitro in co-culture. IL-21 increased the proliferation of Tresp cells in Tresp/Treg co-cultures...
July 3, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28665497/protein-and-modified-vaccinia-virus-ankara-based-influenza-virus-nucleoprotein-vaccines-are-differentially-immunogenic-in-balb-c-mice
#13
Arwen F Altenburg, Sofia E Magnusson, Fons Bosman, Linda Stertman, Rory D de Vries, Guus F Rimmelzwaan
Because of the high variability of seasonal influenza viruses and the eminent threat of influenza viruses with pandemic potential, there is great interest in the development of vaccines that induce broadly protective immunity. Most likely, broadly protective influenza vaccines are based on conserved proteins, such as nucleoprotein (NP). NP is a vaccine target of interest since it has been shown to induce cross-reactive antibody and T cell responses. Here we tested and compared various NP-based vaccine preparations for their capacity to induce humoral and cellular immune responses to influenza virus NP...
June 30, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28665482/the-p2x7-receptor-antagonist-brilliant-blue-g-reduces-serum-human-interferon-%C3%AE-in-a-humanized-mouse-model-of-graft-versus-host-disease
#14
N J Geraghty, L Belfiore, D Ly, S R Adhikary, S J Fuller, W Varikatt, M L Sanderson-Smith, V Sluyter, S I Alexander, R Sluyter, D Watson
Graft-versus-host disease (GVHD) remains a major problem after allogeneic haematopoietic stem cell transplantation, a curative therapy for haematological malignancies. Previous studies have demonstrated a role for the adenosine triphosphate (ATP)-gated P2X7 receptor channel in allogeneic mouse models of GVHD. In this study, injection of human peripheral blood mononuclear cells (PBMCs) into immunodeficient NOD-SCID-IL2Rγ(null) (NSG) mice established a humanized mouse model of GVHD. This model was used to study the effect of P2X7 blockade in this disease...
June 30, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28658504/fty720-ameliorates-renal-fibrosis-by-simultaneously-affecting-leukocyte-recruitment-and-tgf-%C3%AE-signaling-in-fibroblasts
#15
Tongguan Tian, Jun Zhang, Xingxing Zhu, Shuang Wen, Dongyan Shi, Hong Zhou
Renal fibrosis is the common final manifestation of chronic kidney diseases and usually results in end-stage renal failure. In this study, we evaluated the effect of FTY720, an analog of sphingosine 1-phosphate (S1P), as a treatment for the unilateral ureteral obstruction (UUO)-induced renal fibrosis animal model. We treated mice with FTY720 at a dosage of 1 mg/kg/day by intragastric administration from day 1 until day 7. The control group received the same amount of saline. FTY720 significantly reduced the urine albumin/creatinine ratio (UACR) in treated UUO mice...
June 28, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28640392/calcineurin-inhibitors-exacerbate-coronary-arteritis-via-the-myd88-signaling-pathway-in-a-murine-model-of-kawasaki-disease
#16
Kenji Murata, Yoshitomo Motomura, Tamami Tanaka, Shunsuke Kanno, Takahisa Yano, Mitsuho Onimaru, Atsushi Shimoyama, Hisanori Nishio, Yasunari Sakai, Masatsugu Oh-Hora, Hiromitsu Hara, Koichi Fukase, Hidetoshi Takada, Satohiro Masuda, Shouichi Ohga, Sho Yamasaki, Toshiro Hara
Calcineurin inhibitors (CNIs) have been used off-label for the treatment of refractory Kawasaki disease (KD). However, it remains unknown whether CNIs show protective effects against the development of coronary artery lesions in KD patients. To investigate the effects of CNIs on coronary arteries and the mechanisms of their actions on coronary arteritis in a mouse model of KD, we performed experiments with FK565, a ligand of nucleotide-binding oligomerization domain-containing protein 1 (Nod1) in wild-type, SCID, CARD9(-/-) , and MyD88(-/-) mice...
June 22, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28640379/comparative-and-correlative-assessments-of-cytokine-complement-and-antibody-patterns-in-pediatric-type-1-diabetes
#17
M Abdel-Latif, A A Abdel-Moneim, M H El-Hefnawy, R G Khalil
One of the most widespread and effective environmental factors is the infection with enteroviruses (EVs) which accelerate β - cell destruction in type 1 diabetes (T1D). This study represented a comparison between diabetic EV(+) and EV- children as well as correlation analysis between autoantibodies, T1D markers, cytokines, complement activation products and anti- coxsackievirus (CV) IgG. EV RNA was detected in Egyptian children with T1D (26.2%) and healthy controls (0%). Detection of anti - CV IgG in T1D - EV(+) resulted in 64% positivity...
June 22, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28621822/cdna-microarray-analysis-identifies-nr4a2-as-a-novel-molecule-involved-in-the-pathogenesis-of-sj%C3%A3-gren-s-syndrome
#18
Hiroyuki Takahashi, Hiroto Tsuboi, Hiromitsu Asashima, Tomoya Hirota, Yuya Kondo, Masafumi Moriyama, Isao Matsumoto, Seiji Nakamura, Takayuki Sumida
OBJECTIVE: To examine genes expressed specifically in labial salivary glands (LSGs) of patients with Sjögren's syndrome (SS) in comparison with those of patients with IgG4-related disease (IgG4-RD) and to identify the genes involved in the pathogenesis of SS. METHODS: Gene expression in LSGs of SS patients, IgG4-RD patients and healthy controls (HC) was analyzed by cDNA microarray. Quantitative PCR (qPCR) was used to validate the up-regulation of differentially expressed genes (DEGs) in SS...
June 16, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28617942/withasteroid-b-from-d-metel-l-regulates-immune-responses-by-modulating-the-jak-stat-pathway-and-the-il-17-ror%C3%AE-t-il-10-foxp3-ratio
#19
Yang Su, Qiuhong Wang, Bingyou Yang, Lun Wu, Genhong Cheng, Haixue Kuang
Datura metel L. is a medicinal herb that contains withasteroids and has a wide range of biological activities. We isolated 7 withasteroids from the flowers of D. metel L(1) . and examined their ability to inhibit immune responses in vitro and in vivo. Among the withasteroids, B2(2) exhibited the strongest inhibitory effect on immune responses comparing B2 with other isolated compounds from D. metel L., including suppressing the differentiation of CD4(+3) T cells by inhibiting the expression and production of T cell lineage-specific master regulators and cytokines and directly suppressing the cytokine-induced JAK/STAT(4) signaling pathways...
June 15, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28617941/association-of-igg4-and-free-light-chain-with-idiopathic-pleural-effusion
#20
Yoriyuki Murata, Keisuke Aoe, Yuka Mimura-Kimura, Tomoyuki Murakami, Keiji Oishi, Tsuneo Matsumoto, Hiroshi Ueoka, Kazuto Matsunaga, Masafumi Yano, Yusuke Mimura
The cause of pleural effusion remains uncertain in approximately 15% of patients despite exhaustive evaluation. As recently described IgG4-related disease is a fibroinflammatory disorder that can affect various organs including the lungs, we investigate whether idiopathic pleural effusion includes IgG4-associated etiology. Between 2000 and 2012, we collected 830 pleural fluid samples and reviewed 35 patients with pleural effusions undiagnosed after pleural biopsy at Yamaguchi-Ube Medical Center. Importantly, IgG4 immunostaining revealed infiltration of IgG4-positive plasma cells in the pleura of 12 patients (34%, IgG4+ group)...
June 15, 2017: Clinical and Experimental Immunology
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