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Antibody secreting cells

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https://www.readbyqxmd.com/read/29052936/a-humanized-monoclonal-antibody-that-inhibits-platelet-surface-erp72-reveals-a-role-for-erp72-in-thrombosis
#1
L Holbrook, G K Sandhar, P Sasikumar, M P Schenk, A R Stainer, K Sahli, G D Flora, A B Bicknell, J M Gibbins
BACKGROUND: Within the endoplasmic reticulum, thiol isomerase enzymes modulate the formation and rearrangement of disulphide bonds in newly folded proteins entering the secretory pathway to ensure correct protein folding. In addition to their intracellular importance, thiol isomerases have been recently identified to be present on the surface of a number of cell types where they are important for cell function. Several thiol isomerases are known to be present on the resting platelet surface including PDI, ERp5 and ERp57 and levels are increased following platelet activation...
October 20, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/29052125/differences-in-innate-ifn%C3%AE-and-il-17-responses-to-bordetella-pertussis-between-balb-c-and-c57bl-6-mice-role-of-%C3%AE-%C3%AE-t-cells-nk-cells-and-dendritic-cells
#2
Yung-Yi C Mosley, Fangjia Lu, Harm HogenEsch
Cell-mediated immune responses characterized by the secretion of IFNγ and IL-17 play an important role in the immune response to Bordetella pertussis (B. pertussis). We investigated innate sources of IFNγ and IL-17 upon stimulation of spleen cells from BALB/c (B/c) and C57BL/6 (B6) mice with heat-killed B. pertussis (hkBp). Spleen cells from B/c mice secreted less IFNγ and more IL-17 than those from B6 mice. Innate IFNγ was produced predominantly by NK cells in B/c mice and by CD8 T cells and NK cells in B6 mice...
October 19, 2017: Immunologic Research
https://www.readbyqxmd.com/read/29051759/ifn%C3%AE-enhances-cd64-potentiated-phagocytosis-of-treponema-pallidum-opsonized-with-human-syphilitic-serum-by-human-macrophages
#3
Kelly L Hawley, Adriana R Cruz, Sarah J Benjamin, Carson J La Vake, Jorge L Cervantes, Morgan LeDoyt, Lady G Ramirez, Daniza Mandich, Mary Fiel-Gan, Melissa J Caimano, Justin D Radolf, Juan C Salazar
Syphilis is a multi-stage, sexually transmitted disease caused by the spirochete Treponema pallidum (Tp). Considered broadly, syphilis can be conceptualized as a dualistic process in which spirochete-driven inflammation, the cause of clinical manifestations, coexists to varying extents with bacterial persistence. Inflammation is elicited in the tissues, along with the persistence of spirochetes to keep driving a robust immune response while evading host defenses; this duality is best exemplified during the florid, disseminated stage called secondary syphilis (SS)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29050279/ssecks-akap12-scaffolding-functions-suppress-b16f10-induced-peritoneal-metastasis-by-attenuating-cxcl9-10-secretion-by-resident-fibroblasts
#4
Masashi Muramatsu, Lingqiu Gao, Jennifer Peresie, Benjamin Balderman, Shin Akakura, Irwin H Gelman
SSeCKS/Gravin/AKAP12 (SSeCKS) is a kinase scaffolding protein known to suppress metastasis by attenuating tumor-intrinsic PKC- and Src-mediated signaling pathways [1]. In addition to downregulation in metastatic cells, in silico analyses identified SSeCKS downregulation in prostate or breast cancer-derived stroma, suggesting a microenvironmental cell role in controlling malignancy. Although orthotopic B16F10 and SM1WT1[Braf(V600E)] mouse melanoma tumors grew similarly in syngeneic WT or SSeCKS-null (KO) mice, KO hosts exhibited 5- to 10-fold higher levels of peritoneal metastasis, and this enhancement could be adoptively transferred by pre-injecting naïve WT mice with peritoneal fluid (PF), but not non-adherent peritoneal cells (PC), from naïve KO mice...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29049729/myocilin-regulates-metalloprotease-2-activity-through-interaction-with-timp3
#5
Myung Kuk Joe, Raquel L Lieberman, Naoki Nakaya, Stanislav I Tomarev
Purpose: To elucidate functions of wild-type myocilin, a secreted glycoprotein associated with glaucoma. Methods: Lysates of mouse eyes were used for immunoprecipitation with affinity-purified antibodies against mouse myocilin. Shotgun proteomic analysis was used for the identification of proteins interacting with myocilin. Colocalization of myocilin and tissue inhibitor of metalloproteinases 3 (TIMP3) in different eye structures was investigated by a multiplex fluorescent in situ hybridization and immunofluorescent labeling with subsequent confocal microscopy...
October 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29049345/processing-of-the-major-autolysin-of-e-faecalis-atla-by-the-zinc-metalloprotease-gele-impacts-atla-septal-localization-and-cell-separation
#6
Emily K Stinemetz, Peng Gao, Kenneth L Pinkston, Maria Camila Montealegre, Barbara E Murray, Barrett R Harvey
AtlA is the major peptidoglycan hydrolase of Enterococcus faecalis involved in cell division and cellular autolysis. The secreted zinc metalloprotease, gelatinase (GelE), has been identified as an important regulator of cellular function through post-translational modification of protein substrates. AtlA is a known target of GelE, and their interplay has been proposed to regulate AtlA function. To study the protease-mediated post-translational modification of AtlA, monoclonal antibodies were developed as research tools...
2017: PloS One
https://www.readbyqxmd.com/read/29048644/human-amniotic-epithelial-cells-inhibit-growth-of-epithelial-ovarian-cancer-cells-via-tgf%C3%A2-%C3%AE-1-mediated-cell-cycle-arrest
#7
Shixia Bu, Qiuwan Zhang, Qian Wang, Dongmei Lai
It is reported that human amniotic epithelial cells (hAECs) endow intrinsic antitumor effects on certain kinds of cancer. This research was designed to evaluate whether hAECs endowed potential anticancer properties on epithelial ovarian cancer (EOC) cells in vivo and in vitro, which has not been reported before. In this study, we established a xenografted BALB/c nude mouse model by subcutaneously co-injecting ovarian cancer cell line, SK-OV-3, and hAECs for 28 days. In ex vivo experiments, CCK‑8 cell viability assay, real-time PCR, cell counting assay, cell cycle analysis and immunohistochemistry (IHC) assay were used to detect the effects of hAEC‑secreted factors on the proliferation and cell cycle progression of EOC cells...
September 14, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/29047383/a-novel-small-molecule-inhibitor-of-p32-mitochondrial-protein-overexpressed-in-glioma
#8
Venkata Yenugonda, Natsuko Nomura, Valentina Kouznetsova, Igor Tsigelny, Valentina Fogal, Elmar Nurmemmedov, Santosh Kesari, Ivan Babic
BACKGROUND: The mitochondrial protein p32 is a validated therapeutic target of cancer overexpressed in glioma. Therapeutic targeting of p32 with monoclonal antibody or p32-binding LyP-1 tumor-homing peptide can limit tumor growth. However, these agents do not specifically target mitochondrial-localized p32 and would not readily cross the blood-brain barrier to target p32-overexpressing gliomas. Identifying small molecule inhibitors of p32 overexpressed in cancer is a more rational therapeutic strategy...
October 18, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29046141/generation-and-characterization-of-a-bispecific-antibody-targeting-both-pd-1-and-c-met
#9
Yi Wu, Min Yu, Zujun Sun, Weihua Hou, Yuxiong Wang, Qingyun Yuan, Wei Mo
Bispecific antibodies, BsAbs, are molecules with the ability to bind to two different epitopes on the same or different antigens. The goal of this study was to create a novel bispecific antibody targeting both cellular-mesenchymal to epithelial transition factor(c-MET) and programmed death-1(PD-1) as an anti-cancer therapeutic candidate. Upon binding to the c-MET antigen on a tumor cell and the PD-1 antigen on a T cell, a BsAb can redirect T cells for tumor killing. Based on the original sequences of PD-1 and c-MET mAbs, a BsAb gene was designed, and cloned into the pCEP4 vector...
October 17, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/29045049/germinal-center-b-cells-are-essential-for-collagen-induced-arthritis
#10
Albert Dahdah, Katrin Habir, Kutty Selva Nandakumar, Amit Saxena, Bingze Xu, Rikard Holmdahl, Stephen Malin
OBJECTIVE: Rheumatoid arthritis (RA) is considered a prototypical autoimmune disorder. Several mechanisms have been proposed for the known pathological function of B cells in RA, including antigen presentation, cytokine secretion and humoral immunity. METHODS: To address the function of B lymphocytes in experimental arthritis, we mapped the adaptive immune response following collagen-induced arthritis (CIA). We subsequently followed these responses and disease outcomes in novel genetically modified mouse strains that lack mature B cells or germinal center functionality in a B cell-intrinsic manner on a CIA MHC-II susceptible background...
October 17, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29042504/unintended-laboratory-driven-evolution-reveals-genetic-requirements-for-biofilm-formation-by-desulfovibrio-vulgaris-hildenborough
#11
Kara B De León, Grant M Zane, Valentine V Trotter, Gregory P Krantz, Adam P Arkin, Gareth P Butland, Peter J Walian, Matthew W Fields, Judy D Wall
Biofilms of sulfate-reducing bacteria (SRB) are of particular interest as members of this group are culprits in corrosion of industrial metal and concrete pipelines as well as being key players in subsurface metal cycling. Yet the mechanism of biofilm formation by these bacteria has not been determined. Here we show that two supposedly identical wild-type cultures of the SRB Desulfovibrio vulgaris Hildenborough maintained in different laboratories have diverged in biofilm formation. From genome resequencing and subsequent mutant analyses, we discovered that a single nucleotide change within DVU1017, the ABC transporter of a type I secretion system (T1SS), was sufficient to eliminate biofilm formation in D...
October 17, 2017: MBio
https://www.readbyqxmd.com/read/29042252/the-roles-and-applications-of-autoantibodies-in-progression-diagnosis-treatment-and-prognosis-of-human-malignant-tumours
#12
REVIEW
Jing Wu, Xiaobo Li, Wuqi Song, Yong Fang, Li Yu, Siyuan Liu, Leonid P Churilov, Fengmin Zhang
The existence of autoantibodies towards an individual's own proteins or nucleic acids has been established for more than 100years, and for a long period, these autoantibodies have been believed to be closely associated with autoimmune diseases. However, in recent years, researchers have become more interested in the role and application of autoantibodies in progression, diagnosis, treatment and prognosis of human malignant tumours. Over the past few decades, numerous epidemiological studies have shown that the risk of certain cancers is significantly altered (increased or decreased) in patients with autoimmune diseases, which suggests that autoantibodies may play either promoting or suppressing roles in cancer progression...
October 14, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/29040534/macrophages-escape-klotho-gene-silencing-in-the-mdx-mouse-model-of-duchenne-muscular-dystrophy-and-promote-muscle-growth-and-increase-satellite-cell-numbers-through-a-klotho-mediated-pathway
#13
Michelle Wehling-Henricks, Steven S Welc, Guiseppina Samengo, Chiara Rinaldi, Catherine Lindsey, Ying Wang, Jeongyoon Lee, Makoto Kuro-O, James G Tidball
Duchenne muscular dystrophy (DMD) is a muscle wasting disease in which inflammation influences the severity of pathology. We found that the onset of muscle inflammation in the mdx mouse model of DMD coincides with large increases in expression of pro-inflammatory cytokines [tumor necrosis factor-α (TNFα); interferon gamma (IFNγ)] and dramatic reductions of the pro-myogenic protein Klotho in muscle cells and large increases of Klotho in pro-regenerative, CD206+ macrophages. Furthermore, TNFα and IFNγ treatments reduced Klotho in muscle cells and increased Klotho in macrophages...
October 12, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29039467/insulin-like-growth-factor-binding-protein-6-released-from-human-mesenchymal-stem-cells-confers-neuronal-protection-through-igf-1r-mediated-signaling
#14
Hyo-Jin Jeon, Jihye Park, Joo-Hyun Shin, Mi-Sook Chang
Human bone marrow‑derived mesenchymal stem cells (hMSCs) are a desirable cell source for cell‑based therapy to treat nervous system injuries due to their ability to differentiate into specific cell types. In addition to their multipotency, hMSCs render the tissue microenvironment more favorable for tissue repair by secreting various growth factors. Our previous study demonstrated that hMSCs secrete several growth factors, including several insulin‑like growth factor binding proteins (IGFBPs). Among these, IGFBP‑6 binds with high affinity and inhibits insulin growth factor‑2 (IGF‑2) to inhibit the growth of IGF‑2‑dependent tumors...
October 5, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29036448/il6-secretion-from-alternatively-activated-macrophages-promotes-the-migration-of-endometriotic-epithelial-cells
#15
Jeong-Hwa Woo, Yeong-In Yang, Ji-Hye Ahn, Youn Seok Choi, Jung-Hye Choi
Accumulating evidence has suggested an interaction between endometriotic cells and macrophages in the endometriotic microenvironment and the potential role of this interaction in the pathogenesis of endometriosis. However, how endometriotic cells communicate with macrophages to influence their function is poorly understood. In the present study, we found that the mRNA expression and production of CC chemokine ligand 2 (CCL2) were much higher in human endometriotic epithelial cells (11Z and 12Z) than those in human endometrial epithelial cells (HES)...
October 4, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29033895/autoimmune-thyroid-diseases-in-patients-treated-with-alemtuzumab-for-multiple-sclerosis-an-example-of-selective-anti-tsh-receptor-immune-response
#16
REVIEW
Mario Rotondi, Martina Molteni, Paola Leporati, Valentina Capelli, Michele Marinò, Luca Chiovato
Alemtuzumab, a humanized anti-CD52 monoclonal antibody, is approved for the treatment of active relapsing-remitting multiple sclerosis (MS). Alemtuzumab induces a rapid and prolonged depletion of lymphocytes from the circulation, which results in a profound immuno-suppression status followed by an immune reconstitution phase. Secondary to reconstitution autoimmune diseases represent the most common side effect of Alemtuzumab treatment. Among them, Graves' disease (GD) is the most frequent one with an estimated prevalence ranging from 16...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29021612/il-15-promotes-human-myogenesis-and-mitigates-the-detrimental-effects-of-tnf%C3%AE-on-myotube-development
#17
Mary F O'Leary, Graham R Wallace, Andrew J Bennett, Kostas Tsintzas, Simon W Jones
Studies in murine cell lines and in mouse models suggest that IL-15 promotes myogenesis and may protect against the inflammation-mediated skeletal muscle atrophy which occurs in sarcopenia and cachexia. The effects of IL-15 on human skeletal muscle growth and development remain largely uncharacterised. Myogenic cultures were isolated from the skeletal muscle of young and elderly subjects. Myoblasts were differentiated for 8 d, with or without the addition of recombinant cytokines (rIL-15, rTNFα) and an IL-15 receptor neutralising antibody...
October 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29021394/hiv-1-gp120-protein-and-mvagp140-boost-immunogens-increase-immunogenicity-of-a-dna-mva-hiv-1-vaccine
#18
Xiaoying Shen, Rahul Basu, Sheetal Sawant, David Beaumont, Sue Fen Kwa, Celia LaBranche, Kelly E Seaton, Nicole L Yates, David C Montefiori, Guido Ferrari, Linda S Wyatt, Bernard Moss, S Munir Alam, Barton F Haynes, Georgia D Tomaras, Harriet L Robinson
An important goal of human immunodeficiency virus (HIV) vaccine design is identification of strategies that elicit effective antiviral humoral immunity. One novel approach comprises priming with DNA and boosting with modified vaccinia Ankara (MVA) expressing HIV-1 Env on virus like particles. Here we evaluated whether the addition of a gp120 protein in alum or MVA expressed secreted gp140 (MVAgp140) could improve immunogenicity of a DNA prime - MVA boost vaccine. Five rhesus macaques per group received two DNA primes at weeks 0 and 8 followed by three MVA boosts (with or without additional protein or MVAgp140) at weeks 18, 26 and 40...
October 11, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29021002/collagen-triple-helix-repeat-containing-1-cthrc1-activates-integrin-%C3%AE-3-fak-signaling-and-promotes-metastasis-in-ovarian-cancer
#19
Biying Guo, Huan Yan, Luying Li, Kemin Yin, Fang Ji, Shu Zhang
BACKGROUND: Metastasis is the major cause of morbidity and mortality in patients with epithelial ovarian cancer (EOC), however the mechanisms that underline this process are poorly understood. Collagen triple helix repeat containing-1 (CTHRC1) is a 28-kDa secreted protein reported to be involved in vascular remodeling, bone formation and morphogenesis. This study aimed to investigate the role of CTHRC1 in promoting the metastasis of EOC and to elucidate the underlying molecular mechanisms...
October 11, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/29020226/innate-t-and-b-cell-responses-in-acute-human-zika-patients
#20
Lilin Lai, Nadine Rouphael, Yongxian Xu, Muktha S Natrajan, Allison Beck, Mari Hart, Matthew Feldhammer, Amanda Feldpausch, Charles Hill, Henry Wu, Jessica K Fairley, Pamela Lankford-Turner, Nicole Kasher, Patrick Rago, Yi-Juan Hu, Srilatha Edupuganti, Shital M Patel, Kristy O Murray, Mark J Mulligan
Background: There is an urgent need for studies of viral persistence and immunity during human Zika infections to inform planning and conduct of vaccine clinical trials. Methods: In five returned US travelers with acute symptomatic Zika infection, clinical features, viral RNA levels, and immune responses were characterized. Results: Two pregnant, flavivirus-experienced patients had viral RNA persist in plasma for >44 and >26 days. Three days after symptom onset transient increases in pro-inflammatory monocytes began followed at five days by transient decreases in myeloid dendritic cells...
August 17, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
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