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https://www.readbyqxmd.com/read/28504613/chlpmab-23-cancer-specific-human-mouse-chimeric-anti-podoplanin-antibody-exhibits-antitumor-activity-via-antibody-dependent-cellular-cytotoxicity
#1
Mika K Kaneko, Takuro Nakamura, Akiko Kunita, Masashi Fukayama, Shinji Abe, Yasuhiko Nishioka, Shinji Yamada, Miyuki Yanaka, Noriko Saidoh, Kanae Yoshida, Yuki Fujii, Satoshi Ogasawara, Yukinari Kato
Podoplanin is expressed in many cancers, including oral cancers and brain tumors. The interaction between podoplanin and its receptor C-type lectin-like receptor 2 (CLEC-2) has been reported to be involved in cancer metastasis and tumor malignancy. We previously established many monoclonal antibodies (mAbs) against human podoplanin using the cancer-specific mAb (CasMab) technology. LpMab-23 (IgG1, kappa), one of the mouse anti-podoplanin mAbs, was shown to be a CasMab. However, we have not shown the usefulness of LpMab-23 for antibody therapy against podoplanin-expressing cancers...
May 15, 2017: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
https://www.readbyqxmd.com/read/28499858/enhanced-behavioral-immune-defenses-in-a-c-%C3%A2-elegans-c-type-lectin-like-domain-gene-mutant
#2
Barbara Pees, Anke Kloock, Rania Nakad, Camilo Barbosa, Katja Dierking
C-type lectin-like domain (CTLD) proteins occupy crucial functions in the immune system of vertebrates, but their role in invertebrate immunity is much less understood. The nematode Caenorhabditis elegans possesses a highly diverse CTLD protein encoding (clec) gene repertoire. A role of C. elegans clec genes in pathogen defense is always assumed, yet experimental evidence for clec immune function is rare. To systematically test the potential function of clec genes in the C. elegans defense against pathogens, we screened 39 clec mutants for survival on the Gram-positive pathogen Bacillus thuringiensis (BT18247) and 37 clec mutants on the Gram-negative pathogen Pseudomonas aeruginosa (PA14)...
May 10, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28385772/clec-2-podoplanin-and-thromboinflammation
#3
Katsue Suzuki-Inoue
No abstract text is available yet for this article.
April 6, 2017: Blood
https://www.readbyqxmd.com/read/28332312/antitumor-activity-of-chlpmab-2-a-human-mouse-chimeric-cancer-specific-antihuman-podoplanin-antibody-via-antibody-dependent-cellular-cytotoxicity
#4
Mika K Kaneko, Shinji Yamada, Takuro Nakamura, Shinji Abe, Yasuhiko Nishioka, Akiko Kunita, Masashi Fukayama, Yuki Fujii, Satoshi Ogasawara, Yukinari Kato
Human podoplanin (hPDPN), a platelet aggregation-inducing transmembrane glycoprotein, is expressed in different types of tumors, and it binds to C-type lectin-like receptor 2 (CLEC-2). The overexpression of hPDPN is involved in invasion and metastasis. Anti-hPDPN monoclonal antibodies (mAbs) such as NZ-1 have shown antitumor and antimetastatic activities by binding to the platelet aggregation-stimulating (PLAG) domain of hPDPN. Recently, we developed a novel mouse anti-hPDPN mAb, LpMab-2, using the cancer-specific mAb (CasMab) technology...
April 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28296036/targeting-of-c-type-lectin-like-receptor%C3%A2-2-or-p2y12-for-the-prevention-of-platelet-activation-by-immunotherapeutic-cpg-oligodeoxynucleotides
#5
C Delierneux, N Donis, L Servais, O Wéra, C Lecut, M Vandereyken, L Musumeci, S Rahmouni, J Schneider, J A Eble, P Lancellotti, C Oury
Essentials CpG oligodeoxynucleotide (ODN) immuotherapeutics cause undesired platelet activating effects. It is crucial to understand the mechanisms of these effects to identify protective strategies. CpG ODN-induced platelet activation depends on C-type lectin-like receptor 2 (CLEC-2) and P2Y12. Targeting CLEC-2 or P2Y12 fully prevents CpG ODN-induced platelet activation and thrombosis. SUMMARY: Background Synthetic phosphorothioate-modified CpG oligodeoxynucleotides (ODNs) show potent immunostimulatory properties that are widely exploited in clinical trials of anticancer treatment...
May 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28294559/the-platelet-activating-receptor-c-type-lectin-receptor-2-plays-an-essential-role-in-liver-regeneration-after-partial-hepatectomy-in-mice
#6
H Kono, H Fujii, K Suzuki-Inoue, O Inoue, S Furuya, K Hirayama, Y Akazawa, Y Nakata, C Sun, N Tsukiji, T Shirai, Y Ozaki
Essentials Regeneration role of C-type lectin receptor-2 (CLEC-2) after 70% hepatectomy (HPx) was investigated. Wild-type or CLEC-2 deleted from platelets of chimeric mice (flKO) underwent HPx. The liver/body weight ratio was significantly lower in the flKO than in the wild-type. CLEC-2 plays an essential role in liver regeneration after HPx. SUMMARY: Background and aim The aim of the present study was to investigate the role of C-type lectin receptor (CLEC)-2 in liver regeneration following partial liver resection in mice...
May 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28288575/lactobacillus-derived-extracellular-vesicles-enhance-host-immune-responses-against-vancomycin-resistant-enterococci
#7
Ming Li, Kiho Lee, Min Hsu, Gerard Nau, Eleftherios Mylonakis, Bharat Ramratnam
BACKGROUND: Probiotic bacteria are known to modulate host immune responses against various pathogens. Recently, extracellular vesicles (EVs) have emerged as potentially important mediators of host-pathogen interactions. In this study, we explored the role of L. plantarum derived EVs in modulating host responses to vancomycin-resistant Enterococcus faecium (VRE) using both Caenorhabditis elegans and human cells. RESULTS: Our previous work has shown that probiotic conditioning C...
March 14, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28209350/n-decyl-s-trityl-r-cysteine-a-new-chiral-selector-for-green-ligand-exchange-chromatography-applications
#8
Andrea Carotti, Federica Ianni, Emidio Camaioni, Lucia Pucciarini, Maura Marinozzi, Roccaldo Sardella, Benedetto Natalini
In search for new enantioselectivity profiles, the N-decyl-S-trityl-(R)-cysteine [C10-(R)-STC] was synthesized through a one-step procedure and then hydrophobically adsorbed onto an octadecylsilica surface to generate a stable chiral stationary phase for ligand-exchange chromatography (CLEC-CSP) applications. The CLEC analysis was carried out on underivatized amino acids, by using a Cu(II) sulphate (1.0mM) containing aqueous eluent system. Most of the analysed compounds (34 out of 45) were enantiodiscriminated by the C10-(R)-STC-based CSP, with resolution factor (RS) values up to 8...
February 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28157429/chimeric-anti-human-podoplanin-antibody-nz-12-of-lambda-light-chain-exerts-higher-antibody-dependent-cellular-cytotoxicity-and-complement-dependent-cytotoxicity-compared-with-nz-8-of-kappa-light-chain
#9
Mika K Kaneko, Shinji Abe, Satoshi Ogasawara, Yuki Fujii, Shinji Yamada, Takeshi Murata, Hiroaki Uchida, Hideaki Tahara, Yasuhiko Nishioka, Yukinari Kato
Podoplanin (PDPN), a type I transmembrane 36-kDa glycoprotein, is expressed not only in normal cells, such as renal epithelial cells (podocytes), lymphatic endothelial cells, and pulmonary type I alveolar cells, but also in cancer cells, including brain tumors and lung squamous cell carcinomas. Podoplanin activates platelet aggregation by binding to C-type lectin-like receptor-2 (CLEC-2) on platelets, and the podoplanin/CLEC-2 interaction facilitates blood/lymphatic vessel separation. We previously produced neutralizing anti-human podoplanin monoclonal antibody (mAb), clone NZ-1 (rat IgG2a, lambda), which neutralizes the podoplanin/CLEC-2 interaction and inhibits platelet aggregation and cancer metastasis...
February 2017: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
https://www.readbyqxmd.com/read/28104688/mice-with-a-deficiency-in-clec-2-are-protected-against-deep-vein-thrombosis
#10
Holly Payne, Tatyana Ponomaryov, Steve P Watson, Alexander Brill
Deep vein thrombosis (DVT) with its major complication, pulmonary embolism, is a global health problem. Mechanisms of DVT remain incompletely understood. Platelets play a role in DVT, but the impact of specific platelet receptors remains unclear. Platelet C-type lectin-like receptor 2 (CLEC-2) is known to maintain the physiological state of blood vasculature under inflammatory conditions. DVT is a thromboinflammatory disorder developing largely as sterile inflammation in the vessel wall. We hypothesized therefore that CLEC-2 might play a role in DVT...
April 6, 2017: Blood
https://www.readbyqxmd.com/read/28101903/development-and-characterization-of-anti-glycopeptide-monoclonal-antibodies-against-human-podoplanin-using-glycan-deficient-cell-lines-generated-by-crispr-cas9-and-talen
#11
Mika K Kaneko, Takuro Nakamura, Ryusuke Honma, Satoshi Ogasawara, Yuki Fujii, Shinji Abe, Michiaki Takagi, Hiroyuki Harada, Hiroyoshi Suzuki, Yasuhiko Nishioka, Yukinari Kato
Human podoplanin (hPDPN), which binds to C-type lectin-like receptor-2 (CLEC-2), is involved in platelet aggregation and cancer metastasis. The expression of hPDPN in cancer cells or cancer-associated fibroblasts indicates poor prognosis. Human lymphatic endothelial cells, lung-type I alveolar cells, and renal glomerular epithelial cells express hPDPN. Although numerous monoclonal antibodies (mAbs) against hPDPN are available, they recognize peptide epitopes of hPDPN. Here, we generated a novel anti-hPDPN mAb, LpMab-21...
February 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28028907/c-type-lectin-like-receptor-2-promotes-hematogenous-tumor-metastasis-and-prothrombotic-state-in-tumor-bearing-mice
#12
T Shirai, O Inoue, S Tamura, N Tsukiji, T Sasaki, H Endo, K Satoh, M Osada, H Sato-Uchida, H Fujii, Y Ozaki, K Suzuki-Inoue
Essentials The role of C-type lectin-like receptor-2 (CLEC-2) in cancer progression is unclear. CLEC-2-depleted mouse model is generated by using a rat anti-mouse CLEC-2 monoclonal antibody. CLEC-2 depletion inhibits hematogenous tumor metastasis of podoplanin-expressing B16F10 cells. CLEC-2 depletion prolongs cancer survival by suppressing thrombosis and inflammation. SUMMARY: Background C-type lectin-like receptor 2 (CLEC-2) is a platelet activation receptor of sialoglycoprotein podoplanin, which is expressed on the surface of certain types of tumor cells...
March 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/27999992/c-type-lectins-their-network-and-roles-in-pathogen-recognition-and-immunity
#13
REVIEW
Sabine Mayer, Marie-Kristin Raulf, Bernd Lepenies
C-type lectins (CTLs) represent the most complex family of animal/human lectins that comprises 17 different groups. During evolution, CTLs have developed by diversification to cover a broad range of glycan ligands. However, ligand binding by CTLs is not necessarily restricted to glycans as some CTLs also bind to proteins, lipids, inorganic molecules, or ice crystals. CTLs share a common fold that harbors a Ca(2+) for contact to the sugar and about 18 invariant residues in a phylogenetically conserved pattern...
February 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/27960039/physiologic-and-pathophysiologic-roles-of-interaction-between-c-type-lectin-like-receptor-2-and-podoplanin-partners-from-in-utero-to-adulthood
#14
REVIEW
K Suzuki-Inoue, M Osada, Y Ozaki
A platelet activation receptor, C-type lectin-like receptor 2 (CLEC-2), has been identified as a receptor for a platelet-activating snake venom, rhodocytin. CLEC-2 protein is highly expressed in platelets/megakaryocytes, and at lower levels in liver Kupffer cells. Recently, podoplanin has been revealed as an endogenous ligand for CLEC-2. Podoplanin is expressed in certain types of tumor cells, fibroblastic reticular cells (FRCs) in lymph nodes, kidney podocytes, and lymphatic endothelial cells, but not in vascular endothelial cells...
February 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/27783896/continuous-sensing-photonic-lab-on-a-chip-platform-based-on-cross-linked-enzyme-crystals
#15
Mayte Conejero-Muriel, Isaac Rodríguez-Ruiz, Cristóbal Verdugo-Escamilla, Andreu Llobera, José A Gavira
Microfluidics or lab-on-a-chip technology offer clear advantages over conventional systems such as a dramatic reduction of reagent consumption or a shorter analysis time, which are translated into cost-effective systems. In this work, we present a photonic enzymatic lab-on-a-chip reactor based on cross-linked enzyme crystals (CLECs), able to work in continuous flow, as a highly sensitive, robust, reusable, and stable platform for continuous sensing with superior performance as compared to the state of the art...
December 6, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/27766053/new-horizon-in-platelet-function-with-special-reference-to-a-recently-found-molecule-clec-2
#16
REVIEW
Yukio Ozaki, Shogo Tamura, Katsue Suzuki-Inoue
Platelets play a key role in the pathophysiological processes of hemostasis and thrombus formation. However, platelet functions beyond thrombosis and hemostasis have been increasingly identified in recent years. A large body of evidence now exists which suggests that platelets also play a key role in inflammation, immunity, malignancy, and furthermore in organ development and regeneration, such as the liver. We have recently identified CLEC-2 on the platelet membrane, which induces intracellular activation signals upon interaction of a snake venom, rhodocytin...
2016: Thrombosis Journal
https://www.readbyqxmd.com/read/27766044/anti-thrombotic-agents-derived-from-snake-venom-proteins
#17
REVIEW
Tur-Fu Huang, Chun-Chieh Hsu, Yu-Ju Kuo
Snake venoms affect blood coagulation and platelet function in a complex manner. However, two classes of venom proteins, snaclecs and disintegrins have been shown to specifically target receptors including GPIb, α2β1, GPVI, CLEC-2 and integrins αIIbβ3, αvβ3, α5β1 expressed on platelets, endothelial cells, phagocytes, tumor cells, thus affecting cell-matrices and cell-cell interactions. Here, we focus on disintegrins, a class of low molecular mass Arg-Gly-Asp(RGD)/Lys-Gly-Asp(KGD)-containing, cysteine-rich polypeptide derived from various viper snake venoms...
2016: Thrombosis Journal
https://www.readbyqxmd.com/read/27578274/conservation-of-the-c-type-lectin-fold-for-accommodating-massive-sequence-variation-in-archaeal-diversity-generating-retroelements
#18
Sumit Handa, Blair G Paul, Jeffery F Miller, David L Valentine, Partho Ghosh
BACKGROUND: Diversity-generating retroelements (DGRs) provide organisms with a unique means for adaptation to a dynamic environment through massive protein sequence variation. The potential scope of this variation exceeds that of the vertebrate adaptive immune system. DGRs were known to exist only in viruses and bacteria until their recent discovery in archaea belonging to the 'microbial dark matter', specifically in organisms closely related to Nanoarchaeota. However, Nanoarchaeota DGR variable proteins were unassignable to known protein folds and apparently unrelated to characterized DGR variable proteins...
2016: BMC Structural Biology
https://www.readbyqxmd.com/read/27564251/lpmab-19-recognizes-sialylated-o-glycan-on-thr76-of-human-podoplanin
#19
Satoshi Ogasawara, Mika K Kaneko, Yukinari Kato
Human podoplanin (hPDPN) is expressed in lymphatic vessels, pulmonary type-I alveolar cells, and renal glomerulus. The hPDPN/C-type lectin-like receptor-2 (CLEC-2) interaction is involved in platelet aggregation and cancer metastasis. High expression of hPDPN in cancer cells or cancer-associated fibroblasts (CAFs) leads to a poor prognosis for cancer patients. In our previous research, we reported on several anti-hPDPN monoclonal antibodies (mAbs), including LpMab-2, LpMab-3, LpMab-7, LpMab-9, LpMab-12, LpMab-13, and LpMab-17 of mouse IgG1 subclass, which were produced using CasMab technology...
August 26, 2016: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
https://www.readbyqxmd.com/read/27564117/high-clec-2-expression-associates-with-unfavorable-postoperative-prognosis-of-patients-with-clear-cell-renal-cell-carcinoma
#20
Ying Xiong, Li Liu, Yu Xia, Jiajun Wang, Wei Xi, Qi Bai, Yang Qu, Qilai Long, Jiejie Xu, Jianming Guo
We enrolled a total of 277 patients who received nephrectomy due to clear cell renal cell carcinoma (ccRCC) in Zhongshan Hospital from Jan 2005 to Jun 2007. Immunohistochemistry was performed to evaluate the impact of CLEC-2 positive cell infiltration on the overall survival (OS) and recurrence-free survival (RFS) of patients with ccRCC. Kaplan-Meier analysis showed that high CLEC-2 positive cell infiltration in tumor tissue indicated poorer OS and RFS (OS, p < 0.001; RFS, p = 0.002). High CLEC-2 positive cell infiltration is also an independent risk factor for OS and RFS in multivariate analyses (OS, p = 0...
September 27, 2016: Oncotarget
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