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C-type lectin

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https://www.readbyqxmd.com/read/28813686/genetic-and-functional-characterization-of-a-novel-gh10-endo-%C3%AE-1-4-xylanase-with-a-ricin-type-%C3%AE-trefoil-domain-like-domain-from-luteimicrobium-xylanilyticum-hy-24
#1
Do Young Kim, Sun Hwa Lee, Min Ji Lee, Han-Young Cho, Jong Suk Lee, Young Ha Rhee, Dong-Ha Shin, Kwang-Hee Son, Ho-Yong Park
The gene (1488-bp) encoding a novel GH10 endo-β-1,4-xylanase (XylM) consisting of an N-terminal catalytic GH10 domain and a C-terminal ricin-type β-trefoil lectin domain-like (RICIN) domain was identified from Luteimicrobium xylanilyticum HY-24. The GH10 domain of XylM was 72% identical to that of Micromonospora lupini endo-β-1,4-xylanase and the RICIN domain was 67% identical to that of Actinospica robiniae hypothetical protein. The recombinant enzyme (rXylM: 49kDa) exhibited maximum activity toward beechwood xylan at 65°C and pH 6...
August 13, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28810819/low-cll-1-expression-is-a-novel-adverse-predictor-in-123-patients-with-de-novo-cd34-acute-myeloid-leukemia
#2
Jin Wang, Yanyu Wang, Wen-Lian Chen, Jie Hao, Zhanyun Liu, Xiangqin Weng, Yan Sheng, Jing Wu, Yongmei Zhu, Bing Chen, Shu-Min Xiong, Yu Chen, Qiusheng Chen, Hui-Ping Sun, Junmin Li
Recent reports state that C-type lectin-like molecule-1 (CLL-1) in acute myeloid leukemia (AML) is expressed primarily on myeloid cells, but there is still no investigation about its prognostic significance on leukemic blast compartment. Hence, this study aimed to evaluate the prognostic value of CLL-1 in 123 patients with de novo CD34+ non-M3 AML. Multiparameter flow cytometry was used to assess the expression of CLL-1 on immature compartment in AML and control groups. We found that CLL-1 expression level on blast compartment was closely linked to clinical characteristics, treatment response and survival outcome of patients...
August 16, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28802186/a-l-type-lectin-gene-is-involved-in-the-response-to-hormonal-treatment-and-water-deficit-in-volkamer-lemon
#3
Dayse Drielly Sousa Santana Vieira, Giovanni Emiliani, Paola Bartolini, Alessandra Podda, Mauro Centritto, François Luro, Renata Del Carratore, Raphaël Morillon, Abelmon Gesteira, Biancaelena Maserti
Combination of biotic and abiotic stress is a major challenge for crop and fruit production. Thus, identification of genes involved in cross-response to abiotic and biotic stress is of great importance for breeding superior genotypes. Lectins are glycan-binding proteins with a functions in the developmental processes as well as in the response to biotic and abiotic stress. In this work, a lectin like gene, namely ClLectin1, was characterized in Volkamer lemon and its expression was studied in plants exposed to either water stress, hormonal elicitors (JA, SA, ABA) or wounding to understand whether this gene may have a function in the response to multiple stress combination...
August 1, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28793349/ligation-of-dectin-2-with-a-novel-microbial-ligand-promotes-adjuvant-activity-for-vaccination
#4
Huafeng Wang, Taek-Jin Lee, Scott J Fites, Richard Merkhofer, Robert Zarnowski, Tristan Brandhorst, Kevin Galles, Bruce Klein, Marcel Wüthrich
The development of vaccines against fungi and other intracellular microbes is impeded in part by a lack of suitable adjuvants. While most current vaccines against infectious diseases preferentially induce production of antibodies, cellular immunity is essential for the resolution of fungal infections. Microbes such as fungi and Mycobacterium tuberculosis require Th17 and Th1 cells for resistance, and engage the C-type lectin receptors including Dectin-2. Herein, we discovered a novel Dectin-2 ligand, the glycoprotein Blastomyces Eng2 (Bl-Eng2)...
August 9, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28791019/macrophage-inducible-c-type-lectin-as-a-multifunctional-player-in-immunity
#5
REVIEW
Emmanuel C Patin, Selinda Jane Orr, Ulrich E Schaible
The macrophage-inducible C-type lectin (Mincle) is an innate immune receptor on myeloid cells sensing diverse entities including pathogens and damaged cells. Mincle was first described as a receptor for the mycobacterial cell wall glycolipid, trehalose-6,6'-dimycolate, or cord factor, and the mammalian necrotic cell-derived alarmin histone deacetylase complex unit Sin3-associated protein 130. Upon engagement by its ligands, Mincle induces secretion of innate cytokines and other immune mediators modulating inflammation and immunity...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28776416/synthetic-agonists-of-nod-like-rig-i-like-and-c-type-lectin-receptors-for-probing-the-inflammatory-immune-response
#6
Amy E Nielsen, Joseph D Hantho, Rock J Mancini
Synthetic agonists of innate immune cells are of interest to immunologists due to their synthesis from well-defined materials, optimized activity, and monodisperse chemical purity. These molecules are used in both prophylactic and therapeutic contexts from vaccines to cancer immunotherapies. In this review we highlight synthetic agonists that activate innate immune cells through three classes of pattern recognition receptors: NOD-like receptors, RIG-I-like receptors, and C-type lectin receptors. We classify these agonists by the receptor they activate and present them from a chemical perspective, focusing on structural components that define agonist activity...
August 4, 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/28772263/collectin-11-is-an-important-modulator-of-retinal-pigment-epithelial-cell-phagocytosis-and-cytokine-production
#7
Xia Dong, Weiju Wu, Liang Ma, Chengfei Liu, Mohajeet B Bhuckory, Liping Wang, Emeline F Nandrot, Heping Xu, Ke Li, Yizhi Liu, Wuding Zhou
In this paper, we report previously unknown roles for collectin-11 (CL-11, a soluble C-type lectin) in modulating the retinal pigment epithelial (RPE) cell functions of phagocytosis and cytokine production. We found that CL-11 and its carbohydrate ligand are expressed in both the murine and human neural retina; these resemble each other in terms of RPE and photoreceptor cells. Functional analysis of murine RPE cells showed that CL-11 facilitates the opsonophagocytosis of photoreceptor outer segments and apoptotic cells, and also upregulates IL-10 production...
August 4, 2017: Journal of Innate Immunity
https://www.readbyqxmd.com/read/28768938/a-novel-molecular-model-of-plant-lectin-induced-programmed-cell-death-in-cancer
#8
Zheng Shi, Wen-Wen Li, Yong Tang, Li-Jia Cheng
Plant lectin, a class of highly diverse non-immune origin and carbohydrate-binding proteins, has been reported to specially induce cancer cell through programmed cell death (PCD) pathways (apoptosis and/or autophagy), shedding lights on screening promising anti-cancer candidate agent for further therapeutic trials. However, the complicated molecular mechanisms by which plant lectins induced the programmed death of tumor cells, have not yet been fully clarified. Here, we summarized a novel model, based on vast amount of research, by which plant lectins eliminate various types of cancer cells via three major pathways, including a) direct ribosome inactivating, b) endocytosis-dependent mitochondrial dysfunction and c) sugar-containing receptors binding...
August 1, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28764923/association-of-rs1285933-single-nucleotide-polymorphism-in-clec5a-gene-with-dengue-severity-and-its-functional-effects
#9
Caroline Xavier-Carvalho, Renata Duarte da Silva Cezar, Naishe Matos Freire, Carla Mola, Victor Fiesta, Thiago Gomes de Toledo-Pinto, Luciana Gomes Fialho Torres, Rodrigo Feliciano do Carmo, Luydson Richardson Silva Vasconcelos, Marli Tenório Cordeiro, Paulo Baptista, Elzinandes Leal de Azeredo, Rivaldo Venâncio da Cunha, Luiz José de Souza, Antonio Guilherme Pacheco, Claire Fernandes Kubelka, Patrícia Moura, Milton Ozorio Moraes
Outbreaks of the Zika, dengue, and chikungunya viruses, especially in the Americas, pose a global threat due to their rapid spread and difficulty controlling the vector. Extreme phenotypes are often observed, from asymptomatic to severe clinical manifestations, which are well-studied in dengue. Host variations are also important contributors to disease outcomes, and many case-control studies have associated single nucleotide polymorphisms (SNPs) with severe dengue. Here, we found that the TC genotype and T-carriers for SNP rs1285933 in the C-type lectin superfamily member 5 (CLEC5A) gene was associated with severe dengue in a Northern Brazilian population (OR=2...
July 29, 2017: Human Immunology
https://www.readbyqxmd.com/read/28763100/fungal-derived-cues-promote-ocular-autoimmunity-through-a-dectin-2-card9-mediated-mechanism
#10
Brieanna R Brown, Ellen J Lee, Paige E Snow, Emily E Vance, Yoichiro Iwakura, Naohito Ohno, Noriko Miura, Xin Lin, Gordon D Brown, Christine A Wells, Justine R Smith, Rachel R Caspi, Holly L Rosenzweig
Uveitis (intraocular inflammation) is a leading cause of vision loss. Although its etiology is largely speculative, it is thought to arise from complex genetic-environmental interactions that break immune tolerance to generate eye-specific autoreactive T cells. Experimental autoimmune uveitis (EAU), induced by immunization with the ocular antigen, interphotoceptor retinoid binding protein (IRBP), in combination with mycobacteria-containing CFA, has many clinical and histopathological features of human posterior uveitis...
August 1, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28757467/high-level-expression-and-purification-of-soluble-form-of-human-natural-killer-cell-receptor-nkr-p1-in-hek293s-gnti-cells
#11
Jan Bláha, Barbora Kalousková, Ondřej Skořepa, Samuel Pažický, Petr Novák, Ondřej Vaněk
Human natural killer receptor protein 1 (NKR-P1, CD161, gene klrb1) is a C-type lectin-like receptor of natural killer (NK) cells responsible for recognition of its cognate protein ligand lectin-like transcript 1 (LLT1). NKR-P1 is the single human orthologue of the prototypical rodent NKR-P1 receptors. Naturally, human NKR-P1 is expressed on the surface of NK cells, where it serves as inhibitory receptor; and on T and NKT cells functioning as co-stimulatory receptor promoting secretion of IFNγ. Most notably, it is expressed on Th17 and Tc17 lymphocytes where presumably promotes targeting into LLT1 expressing immunologically privileged niches...
July 27, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28756740/c-type-lectin-receptor-s-targeted-nanoliposomes-an-intelligent-approach-for-effective-cancer-immunotherapy
#12
Rajeev Sharma, Nishi Mody, Varun Kushwah, Sanyog Jain, S P Vyas
AIM: The purpose of present approach is to target C-Type lectin (CTL) receptors for preferential uptake by the macrophages/dendritic cells and improving the cross-presentation of ovalbumin. MATERIALS & METHODS: Conventional and engineered nanoliposomes (MPNLs) were fabricated and extensively characterized. The nanoliposome(s) was spherical in shape; and their ζ potential, size and ovalbumin loading efficiency were recorded to be 268 ± 4.15 nm, 23.4 ± 0.35 mV, 46...
July 31, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28751211/microbial-f-type-lectin-domains-with-affinity-for-blood-group-antigens
#13
Sonal Mahajan, Aasawari Khairnar, Ritika Bishnoi, T N C Ramya
F-type lectins are fucose binding lectins with characteristic fucose binding and calcium binding motifs. Although they occur with a selective distribution in viruses, prokaryotes and eukaryotes, most biochemical studies have focused on vertebrate F-type lectins. Recently, using sensitive bioinformatics search techniques on the non-redundant database, we had identified many microbial F-type lectin domains with diverse domain organizations. We report here the biochemical characterization of F-type lectin domains from Cyanobium sp...
July 24, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28747334/pedf-expression-affects-retinal-endothelial-cell-pro-angiogenic-properties-through-alterations-in-cell-adhesive-mechanisms
#14
Juliana Falero-Perez, SunYoung Park, Christine M Sorenson, Nader Sheibani
Pigment epithelium derived factor (PEDF) is an endogenous inhibitor of angiogenesis. Although various ocular cell types including retinal endothelial cells (EC) produce PEDF, we know very little about cell autonomous effects of PEDF in these cell types. Here we determined how PEDF expression affects retinal EC proangiogenic properties. Retinal EC were prepared from wild type (PEDF+/+) and PEDF-deficient (PEDF-/-) mice. The identity of EC was confirmed by staining for specific markers including VE-cadherin, CD31, and B4-lectin...
July 26, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28746861/investigation-of-the-inhibitory-potential-of-phospholipase-a2-inhibitor-gamma-from-sinonatrix-annularis-to-snake-envenomation
#15
Shengwei Xiong, Yunyun Luo, Lipeng Zhong, Huixiang Xiao, Hong Pan, Keren Liao, Mengxue Yang, Chunhong Huang
SaPLIγ is a novel gamma phospholipase A2 inhibitor (PLI) recently isolated from Sinonatrix annularis, a Chinese endemic non-venomous snake. To explore the neutralization effects of saPLIγ in snakebite envenomation, a dose equivalent to LD50 of Deinagkistrodon acutus, Agkistrodon halys and Naja atra venom with/without saPLIγ was inoculated into the gastrocnemius muscle of female Kunming mice. The ability of saPLIγ to inhibit myonecrosis and systemic toxicity were evaluated through investigations of muscle histopathology, and determination of the serum levels of creatine kinase (CK), lactate dehydrogenase isoenzyme1 (LDH1) and aspartate transferase (AST)...
July 23, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28742087/type-1-skewed-neuroinflammation-and-vascular-damage-associated-with-orientia-tsutsugamushi-infection-in-mice
#16
Lynn Soong, Thomas R Shelite, Yan Xing, Harica Kodakandla, Yuejin Liang, Brandon J Trent, Paulina Horton, Kathryn C Smith, Zhenyang Zhao, Jiaren Sun, Donald H Bouyer, Jiyang Cai
BACKGROUND: Scrub typhus is a life-threatening disease, due to infection with O. tsutsugamushi, a Gram-negative bacterium that preferentially replicates in endothelial cells and professional phagocytes. Meningoencephalitis has been reported in scrub typhus patients and experimentally-infected animals; however, the neurological manifestation and its underlying mechanisms remain poorly understood. To address this issue, we focused on Orientia tsutsugamushi Karp strain (OtK), and examined host responses in the brain during lethal versus self-healing scrub typhus disease in our newly established murine models...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28737447/pmab-52-specific-and-sensitive-monoclonal-antibody-against-cat-podoplanin-for-immunohistochemistry
#17
Shinji Yamada, Shunsuke Itai, Takuro Nakamura, Miyuki Yanaka, Noriko Saidoh, Yao-Wen Chang, Saori Handa, Hiroyuki Harada, Yumiko Kagawa, Osamu Ichii, Satoru Konnai, Mika K Kaneko, Yukinari Kato
Podoplanin (PDPN) is expressed in several normal tissues, such as lymphatic endothelial cells, podocytes of renal glomerulus, and type I alveolar cells of lung. PDPN activates platelet aggregation by binding to C-type lectin-like receptor-2 (CLEC-2) on platelet. Although monoclonal antibodies (mAbs) against human PDPN, mouse PDPN, rat PDPN, rabbit PDPN, dog PDPN, and bovine PDPN have been established, anticat PDPN (cPDPN) mAbs have not been developed. In this study, we immunized mice with Chinese hamster ovary (CHO)-K1 cell lines expressing cPDPN, and developed anti-cPDPN mAbs...
July 24, 2017: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
https://www.readbyqxmd.com/read/28729358/targeting-c-type-lectin-receptors-a-high-carbohydrate-diet-for-dendritic-cells-to-improve-cancer-vaccines
#18
REVIEW
Dieke van Dinther, Dorian A Stolk, Rieneke van de Ven, Yvette van Kooyk, Tanja D de Gruijl, Joke M M den Haan
There is a growing understanding of why certain patients do or do not respond to checkpoint inhibition therapy. This opens new opportunities to reconsider and redevelop vaccine strategies to prime an anticancer immune response. Combination of such vaccines with checkpoint inhibitors will both provide the fuel and release the brake for an efficient anticancer response. Here, we discuss vaccine strategies that use C-type lectin receptor (CLR) targeting of APCs, such as dendritic cells and macrophages. APCs are a necessity for the priming of antigen-specific cytotoxic and helper T cells...
July 20, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28719181/differential-ligand-binding-specificities-of-the-pulmonary-collectins-are-determined-by-the-conformational-freedom-of-a-surface-loop
#19
Michael J Rynkiewicz, Huixing Wu, Tanya R Cafarella, Nikolaos M Nikolaidis, James F Head, Barbara A Seaton, Francis X McCormack
Lung surfactant proteins (SPs) play critical roles in surfactant function and innate immunity. SP-A and SP-D, members of the collectin family of C-type lectins, exhibit distinct ligand specificities, effects on surfactant structure, and host defense functions despite extensive structural homology. SP-A binds to dipalmitoylphosphatidylcholine (DPPC), the major surfactant lipid component, but not phosphatidylinositol (PI), whereas SP-D shows the opposite preference. Additionally, SP-A and SP-D recognize widely divergent pathogen-associated molecular patterns...
July 31, 2017: Biochemistry
https://www.readbyqxmd.com/read/28718199/the-clec12a-receptor-marks-human-basophils-potential-implications-for-minimal-residual-disease-detection-in-myeloid-malignancies
#20
Marie Toft-Petersen, Anne Stidsholt Roug, Trine Plesner, Lene Ebbesen, Gordon D Brown, Line Nederby
BACKGROUND: The transmembrane receptor C-type lectin domain family 12, member A (CLEC12A) is known to be highly expressed on monocytes and neutrophils and is a reliable leukemia associated marker in acute myeloid leukemia. Consequently, detailed knowledge of the various normal cell types expressing this receptor is essential. We have observed CLEC12A to be expressed on CD45lowSSClowCD14-CD123+ basophils in peripheral blood (PB) and in the present study, we aimed at verifying this observation and further delineate the CD45lowSSClowCD14-CD123+CLEC12A+ subpopulation...
July 17, 2017: Cytometry. Part B, Clinical Cytometry
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