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Complement receptor 3

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https://www.readbyqxmd.com/read/28620365/metabolic-value-chemoattractants-are-preferentially-recognized-at-broad-ligand-range-chemoreceptor-of-pseudomonas-putida-kt2440
#1
Matilde Fernández, Miguel A Matilla, Álvaro Ortega, Tino Krell
Bacteria have evolved a wide range of chemoreceptors with different ligand specificities. Typically, chemoreceptors bind ligands with elevated specificity and ligands serve as growth substrates. However, there is a chemoreceptor family that has a broad ligand specificity including many compounds that are not of metabolic value. To advance the understanding of this family, we have used the PcaY_PP (PP2643) chemoreceptor of Pseudomonas putida KT2440 as a model. Using Isothermal Titration Calorimetry we showed here that the recombinant ligand binding domain (LBD) of PcaY_PP recognizes 17 different C6-ring containing carboxylic acids with KD values between 3...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28584051/ion-pulling-simulations-provide-insights-into-the-mechanisms-of-channel-opening-of-the-skeletal-muscle-ryanodine-receptor
#2
David D Mowrey, Le Xu, Yingwu Mei, Daniel A Pasek, Gerhard Meissner, Nikolay V Dokholyan
The type 1 ryanodine receptor (RyR1) mediates Ca(2+) release from the sarcoplasmic reticulum to initiate skeletal muscle contraction and is associated with muscle diseases, malignant hyperthermia, and central core disease. To better understand RyR1 channel function, we investigated the molecular mechanisms of channel gating and ion permeation. An adequate model of channel gating requires accurate, high-resolution models of both open and closed states of the channel. To this end, we generated an open-channel RyR1 model using molecular simulations to pull Ca(2+) through the pore constriction site of a closed-channel RyR1 structure determined at 3...
June 5, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28577078/comparison-of-residual-cancer-burden-american-joint-committee-on-cancer-staging-and-pathologic-complete-response-in-breast-cancer-after-neoadjuvant-chemotherapy-results-from-the-i-spy-1-trial-calgb-150007-150012-acrin-6657
#3
Jeffrey I Campbell, Christina Yau, Polina Krass, Dan Moore, Lisa A Carey, Alfred Au, David Chhieng, Dilip Giri, Chad Livasy, Carolyn Mies, Joseph Rabban, Venetia R Sarode, Baljit Singh, Laura Esserman, Yunn-Yi Chen
PURPOSE: Several pathologic staging systems characterize residual tumor in patients undergoing neoadjuvant chemotherapy for breast cancer. Pathologic complete response (pCR) is now accepted by the Food and Drug Administration as an endpoint for granting accelerated drug approval. Two other systems of post-neoadjuvant pathologic tumor staging-residual cancer burden (RCB) and the American Joint Committee on Cancer post-neoadjuvant therapy staging system (yAJCC)-have been developed to characterize residual tumors when patients do not achieve pCR...
June 2, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28576690/complement-component-c3ar-constitutes-a-novel-regulator-for-chick-eye-morphogenesis
#4
Erika Grajales-Esquivel, Agustin Luz-Madrigal, Jeffrey Bierly, Tracy Haynes, Edimara S Reis, Zeyu Han, Christian Gutierrez, Zachary McKinney, Apostolia Tzekou, John D Lambris, Panagiotis A Tsonis, Katia Del Rio-Tsonis
Complement components have been implicated in a wide variety of functions including neurogenesis, proliferation, cell migration, differentiation, cancer, and more recently early development and regeneration. Following our initial observations indicating that C3a/C3aR signaling induces chick retina regeneration, we analyzed its role in chick eye morphogenesis. During eye development, the optic vesicle (OV) invaginates to generate a bilayer optic cup (OC) that gives rise to the retinal pigmented epithelium (RPE) and neural retina...
May 30, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28562031/europium-labeled-synthetic-c3a-protein-as-a-novel-fluorescent-probe-for-human-complement-c3a-receptor
#5
Aline Dantas de Araujo, Chongyang Wu, Kai-Chen Wu, Robert C Reid, Thomas Durek, Junxian Lim, David P Fairlie
Measuring ligand affinity for a G protein-coupled receptor is often a crucial step in drug discovery. It has been traditionally determined by binding putative new ligands in competition with native ligand labeled with a radioisotope of finite lifetime. Competing instead with a lanthanide-based fluorescent ligand is more attractive due to greater longevity, stability, and safety. Here, we have chemically synthesized the 77 residue human C3a protein and conjugated its N-terminus to europium diethylenetriaminepentaacetate to produce a novel fluorescent protein (Eu-DTPA-hC3a)...
June 21, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28559893/upregulation-of-early-and-downregulation-of-terminal-pathway-complement-genes-in-subcutaneous-adipose-tissue-and-adipocytes-in-acquired-obesity
#6
Sanna Kaye, A Inkeri Lokki, Anna Hanttu, Eija Nissilä, Sini Heinonen, Antti Hakkarainen, Jesper Lundbom, Nina Lundbom, Lilli Saarinen, Olli Tynninen, Maheswary Muniandy, Aila Rissanen, Jaakko Kaprio, Seppo Meri, Kirsi H Pietiläinen
Inflammation is an important mediator of obesity-related complications such as the metabolic syndrome but its causes and mechanisms are unknown. As the complement system is a key mediator of inflammation, we studied whether it is activated in acquired obesity in subcutaneous adipose tissue (AT) and isolated adipocytes. We used a special study design of genetically matched controls of lean and heavy groups, rare monozygotic twin pairs discordant for body mass index (BMI) [n = 26, within-pair difference (Δ) in body mass index, BMI >3 kg/m(2)] with as much as 18 kg mean Δweight...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28553699/generation-of-cmahko-gtko-shtnfri-fc-ho-1-quadruple-gene-modified-pigs
#7
Geon A Kim, Eun Mi Lee, Jun-Xue Jin, Sanghoon Lee, Anukul Taweechaipaisankul, Jong Ik Hwang, Zahid Alam, Curie Ahn, Byeong Chun Lee
As an alternative source of organs for transplantation into humans, attention has been directed to pigs due to their similarities in biological features and organ size. However, severe immune rejection has prevented successful xenotransplantation using pig organs and tissues. To overcome immune rejection, recently developed genetic engineering systems such as TALEN coupled with somatic cell nuclear transfer (SCNT) to make embryos could be used to produce pigs compatible with xenotransplantation. We used the TALEN system to target the non-Gal antigen cytidine monophosphate-N-acetylneuraminic acid hydroxylase (CMAH) gene in pigs that is naturally deleted in humans...
May 28, 2017: Transgenic Research
https://www.readbyqxmd.com/read/28551495/capsular-specific-igm-enhances-complement-mediated-phagocytosis-and-killing-of-cryptococcus-neoformans-by-methamphetamine-treated-j774-16-macrophage-like-cells
#8
Lilit Aslanyan, Vaibhav V Ekhar, Carlos M DeLeon-Rodriguez, Luis R Martinez
Methamphetamine (METH) is a powerful and highly addictive stimulant that affects the central nervous system of users in the United States and worldwide, and its consumption is associated to the acquisition of HIV and AIDS-related infections. METH enhances cryptococcosis in mice, an opportunistic infection caused by the encapsulated fungus Cryptococcus neoformans. Due to its ability to survive within macrophages, C. neoformans is an ideal model to study pathogen-macrophage interactions. METH abrogates normal macrophage function, which might contribute to the higher rate and more rapid progression of infections in drug abusers...
May 25, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28542608/increase-in-complement-ic3b-is-associated-with-anti-inflammatory-cytokine-expression-during-late-pregnancy-in-mice
#9
Keigo Nakamura, Kazuya Kusama, Rulan Bai, Sadamasa Ishikawa, Sayuri Fukushima, Yoshihito Suda, Kazuhiko Imakawa
Immunological tolerance between fetal allograft and mother is crucial for pregnancy establishment and maintenance; however, these mechanisms particularly those during the latter part of pregnancy have not been definitively elucidated. The aim of this study was to examine the presence and potential function of innate immunity characteristic to the middle to late pregnancy. We first characterized up-regulated proteins in decidua from day 11 pregnant (P11) mice using 2D-PAGE, followed by MALDI-TOF/MS analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28538514/long-term-outcome-of-4-patients-with-transcobalamin-deficiency-caused-by-2-novel-tcn2-mutations
#10
Marwan Nashabat, Gustavo Maegawa, Peter H Nissen, Ebba Nexo, Hussain Al-Shamrani, Mohammed Al-Owain, Majid Alfadhel
Cobalamin (vitamin B12 [Cbl]) is an essential cofactor for many biochemical pathways. Transcobalamin (TC) is required to internalize Cbl into the cells through membrane receptor-mediated endocytosis. Cbl is then processed in the cytoplasm and mitochondria by complementation factors leading to its active metabolites; methylcobalamin and 5-deoxyadenosyl-cobalamin. Deficiency of TC results in an elevation in methylmalonic acid and homocysteine. Patients usually present with macrocytic anemia, pancytopenia, failure to thrive, gastrointestinal symptoms, and neurological dysfunction...
May 22, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28527850/complement-activation-by-pulp-capping-materials-plays-a-significant-role-in-both-inflammatory-and-pulp-stem-cells-recruitment
#11
Thomas Giraud, Pierre Rufas, Fanny Chmilewsky, Charlotte Rombouts, Jacques Dejou, Charlotte Jeanneau, Imad About
INTRODUCTION: The role of complement, especially through the C5a fragment, is well-known for the initiation of inflammation. Its involvement in regeneration has been shown more recently by the recruitment of mesenchymal stem cells. C5a can be produced locally by the pulp fibroblasts in response to injury or infection. This work aims to investigate the effect of different pulp capping biomaterials on complement activation and its possible influence on inflammatory and pulp stem cell recruitment...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28526573/transcriptomic-variation-of-locally-infected-skin-of-epinephelus-coioides-reveals-the-mucosal-immune-mechanism-against-cryptocaryon-irritans
#12
Yazhou Hu, Anxing Li, Yang Xu, Biao Jiang, Geling Lu, Xiaochun Luo
Fish skin is the largest immunologically active mucosal organ, providing first-line defense against external pathogens. However, the skin-associated immune mechanisms of fish are still unclear. Cryptocaryon irritans is an obligate ectoparasitic ciliated protozoan that infects almost all marine fish, and is believed to be an excellent pathogen model to study fish mucosal immunity. In this study, a de novo transcriptome assembly of Epinephelus coioides skin post C. irritans tail-infection was performed for the first time using the Illumina HiSeq™ 2500 system...
May 17, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28515212/regulation-of-wnt-signaling-at-the-neuromuscular-junction-by-the-immunoglobulin-super-family-protein-rig-3-in-caenorhabditis-elegans
#13
Pratima Pandey, Ashwani Bhardwaj, Kavita Babu
Perturbations in synaptic function could affect the normal behavior of an animal, making it important to understand the regulatory mechanisms of synaptic signaling. Previous work has shown that in Caenorhabditis elegans an immunoglobulin super-family protein, RIG-3, functions in pre-synaptic neurons to maintain normal acetylcholine receptor levels at the neuromuscular junction (NMJ). In this study we elucidate the molecular and functional mechanism of RIG-3. We demonstrate by genetic and BiFC (Bi-molecular Fluorescence Complementation) assays that pre-synaptic RIG-3 functions by directly interacting with the immunoglobulin domain of the non-conventional Wnt receptor, ROR receptor tyrosine kinase (RTK), CAM-1, that functions in post-synaptic body-wall muscles...
May 17, 2017: Genetics
https://www.readbyqxmd.com/read/28502327/fanconi-anemia-and-laron-syndrome
#14
Inma Castilla-Cortazar, Julieta Rodriguez de Ita, Gabriel Amador Aguirre, Fabiola Castorena-Torres, Jesús Ortiz-Urbina, Mariano García-Magariño, Rocío García de la Garza, Carlos Diaz Olachea, Martha Irma Elizondo Leal
BACKGROUND: Fanconi anemia (FA) is a condition characterized by genetic instability and short stature, which is due to growth hormone (GH) deficiency in most cases. However, no apparent relationships have been identified between FA complementation group genes and GH. In this study, we thereby considered an association between FA and Laron syndrome (LS) (insulin-like growth factor 1 [IGF-1] deficiency). METHODS: A 21-year-old female Mexican patient with a genetic diagnosis of FA was referred to our research department for an evaluation of her short stature...
May 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/28493491/high-doses-of-recombinant-mannan-binding-lectin-inhibit-the-binding-of-influenza-a-h1n1-pdm09-virus-with-cells-expressing-dc-sign
#15
Lei Yu, Shiqiang Shang, Ran Tao, Caiyun Wang, Li Zhang, Hao Peng, Yinghu Chen
The pandemic influenza A (H1N1)pdm09 virus continues to be a threat to human health. Low doses of mannan-binding lectin (MBL) (<1 μg/mL) were shown not to protect against influenza A(H1N1)pdm09 infection. However, the effect of high doses of MBL has not been investigated. Dendritic cell-specific intercellular adhesion molecule-3 grabbing non-integrin (DC-SIGN) has been proposed as an alternative receptor for influenza A(H1N1)pdm09 virus. In this study, we examined the expression of DC-SIGN on DCs as well as on acute monocytic leukemia cell line, THP-1...
July 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28488029/strong-association-of-epidermal-growth-factor-receptor-status-with-breast-cancer-fdg-uptake
#16
Joohee Lee, Eun Jeong Lee, Seung Hwan Moon, Seokhwi Kim, Seung Hyup Hyun, Young Seok Cho, Joon Young Choi, Byung-Tae Kim, Kyung-Han Lee
PURPOSE: Imaging tumor FDG uptake could complement breast cancer biomarkers of risk and treatment response. Although breast cancer FDG uptake is reputedly influenced by major biomarker states, the role of epidermal growth factor receptor (EGFR) expression remains largely unexplored. METHODS: This is a retrospective study that included 499 patients with primary breast cancer at initial presentation. Tumor FDG uptake was measured on pretreatment PET/CT as maximum standardized uptake value (SUVmax), and biomarkers were assessed by immunohistochemistry of tumor tissue...
May 9, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28484081/identification-of-aberrantly-expressed-long-non-coding-rnas-in-stomach-adenocarcinoma
#17
Jianbin Gu, Yong Li, Liqiao Fan, Qun Zhao, Bibo Tan, Kelei Hua, Guobin Wu
AIM: Stomach adenocarcinoma (STAD) is a common malignancy worldwide. This study aimed to identify the aberrantly expressed long non-coding RNAs (lncRNAs) in STAD. RESULTS: Total of 74 DElncRNAs and 449 DEmRNAs were identified in STAD compared with paired non-tumor tissues. The DElncRNA/DEmRNA co-expression network was constructed, which covered 519 nodes and 2993 edges. The qRT-PCR validation results of DElncRNAs were consistent with our bioinformatics analysis based on RNA-sequencing...
April 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28480349/complement-factor-p-is-a-ligand-for-the-natural-killer-cell-activating-receptor-nkp46
#18
Emilie Narni-Mancinelli, Laurent Gauthier, Myriam Baratin, Sophie Guia, Aurore Fenis, Ala-Eddine Deghmane, Benjamin Rossi, Patrick Fourquet, Bertrand Escalière, Yann M Kerdiles, Sophie Ugolini, Muhamed-Kheir Taha, Eric Vivier
Innate lymphoid cells (ILCs) are involved in immune responses to microbes and various stressed cells, such as tumor cells. They include group 1 [such as natural killer (NK) cells and ILC1], group 2, and group 3 ILCs. Besides their capacity to respond to cytokines, ILCs detect their targets through a series of cell surface-activating receptors recognizing microbial and nonmicrobial ligands. The nature of some of these ligands remains unclear, limiting our understanding of ILC biology. We focused on NKp46, which is highly conserved in mammals and expressed by all mature NK cells and subsets of ILC1 and ILC3...
April 28, 2017: Science Immunology
https://www.readbyqxmd.com/read/28471727/safety-and-clinical-activity-of-the-programmed-death-ligand-1-inhibitor-durvalumab-in-combination-with-poly-adp-ribose-polymerase-inhibitor-olaparib-or-vascular-endothelial-growth-factor-receptor-1-3-inhibitor-cediranib-in-women-s-cancers-a-dose-escalation
#19
Jung-Min Lee, Ashley Cimino-Mathews, Cody J Peer, Alexandra Zimmer, Stanley Lipkowitz, Christina M Annunziata, Liang Cao, Maria I Harrell, Elizabeth M Swisher, Nicole Houston, Dana-Adriana Botesteanu, Janis M Taube, Elizabeth Thompson, Aleksandra Ogurtsova, Haiying Xu, Jeffers Nguyen, Tony W Ho, William D Figg, Elise C Kohn
Purpose Data suggest that DNA damage by poly (ADP-ribose) polymerase inhibition and/or reduced vascular endothelial growth factor signaling by vascular endothelial growth factor receptor inhibition may complement antitumor activity of immune checkpoint blockade. We hypothesize the programmed death-ligand 1 (PD-L1) inhibitor, durvalumab, olaparib, or cediranib combinations are tolerable and active in recurrent women's cancers. Patients and Methods This phase I study tested durvalumab doublets in parallel 3 + 3 dose escalations...
May 4, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28456941/activation-of-glucagon-like-peptide-1-receptor-promotes-neuroprotection-in-experimental-autoimmune-encephalomyelitis-by-reducing-neuroinflammatory-responses
#20
Chi-Ho Lee, Se Jin Jeon, Kyu Suk Cho, Eunjung Moon, Arjun Sapkota, Hee Sook Jun, Jong Hoon Ryu, Ji Woong Choi
The signaling axis of glucagon-like peptide-1 (GLP-1)/GLP-1 receptor (GLP-1R) has been an important component in overcoming diabetes, and recent reports have uncovered novel beneficial roles of this signaling axis in central nervous system (CNS) disorders, such as Alzheimer's disease, Parkinson's disease, and cerebral ischemia, accelerating processes for exendin-4 repositioning. Here, we studied whether multiple sclerosis (MS) could be a complement to the CNS disorders that are associated with the GLP-1/GLP-1R signaling axis...
April 29, 2017: Molecular Neurobiology
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