Characterization of a 19,000 mol. wt. flagellum-specific protein of Trypanosoma cruzi, T. dionisii and T. vespertilionis by a monoclonal antibody

1987 ◽  
Vol 73 (2) ◽  
pp. 180-181 ◽  
Author(s):  
K. Petry ◽  
J. Schottelius ◽  
Th. Baltz
Keyword(s):  
Monoclonal Antibody ◽  
Trypanosoma Cruzi ◽  
Specific Protein

Production and characterization of a monoclonal antibody for sweat-specific protein and its application for sweat identification

2003 ◽  
Vol 117 (2) ◽  
pp. 90-95 ◽  
Author(s):  
Kazunori Sagawa ◽  
Akihiko Kimura ◽  
Yoshifumi Saito ◽  
Hiroshi Inoue ◽  
Seiji Yasuda ◽  
...  
Keyword(s):  
Monoclonal Antibody ◽  
Specific Protein

scholarly journals Antigen characterization of vector-borne and cultured metacyclic trypomastigotes of Trypanosoma cruzi

1986 ◽  
Vol 28 (2) ◽  
pp. 80-86 ◽  
Author(s):  
N. Yoshida ◽  
M. M. G. Teixeira ◽  
C. A. Sbravate
Keyword(s):  
Monoclonal Antibody ◽  
Trypanosoma Cruzi ◽  
Surface Protein ◽  
Metacyclic Trypomastigotes ◽  
Vector Borne ◽  
Axenic Cultures ◽  
Cruzi Infection

Metacyclic trypomastigotes ol the CL strain of Trypanosoma cruzi obtained from triatomid vectors and from axenic cultures were comparatively analysed as to their antigen make-up and immunogenic characteristics. They were found to be similar by the various parameters examined. Thus, sera of mice immunized with either one of the two metacyclic types precipitated a 82Kd surface protein from 131I-labeled culture metacyclics. Sera of mice protected against acute T. cruzi infection by immunization with killed culture metacyclics of a different strain (G) recognized, by immunoblotting, a 77Kd protein in both types of CL strain metacyclics. A monoclonal antibody raised against G strain metacyclics, and specific for metacyclic stages of this strain, reacted with both CL strain metacyclic types. Both metacyclic forms were similarly Iysed by various anti-T. cruzi sera, in a complement-mediated reaction.

Functional Characterization of PM6/13, a β3-specific (GPIIIa/CD61) Monoclonal Antibody that Shows Preferential Inhibition of Fibrinogen Binding over Fibronectin Binding to Activated Human Platelets

1998 ◽  
Vol 79 (01) ◽  
pp. 177-185 ◽  
Author(s):  
Ashia Siddiqua ◽  
Michael Wilkinson ◽  
Vijay Kakkar ◽  
Yatin Patel ◽  
Salman Rahman ◽  
...  
Keyword(s):  
Monoclonal Antibody ◽  
Platelet Aggregation ◽  
Platelet Rich Plasma ◽  
Functional Characterization ◽  
Human Platelets ◽  
Western Blots ◽  
Activated Platelets ◽  
Reducing Conditions ◽  
Fibronectin Binding

SummaryWe report the characterization of a monoclonal antibody (MAb) PM6/13 which recognises glycoprotein IIIa (GPIIIa) on platelet membranes and in functional studies inhibits platelet aggregation induced by all agonists examined. In platelet-rich plasma, inhibition of aggregation induced by ADP or low concentrations of collagen was accompanied by inhibition of 5-hydroxytryptamine secretion. EC50 values were 10 and 9 [H9262]g/ml antibody against ADP and collagen induced responses respectively. In washed platelets treated with the cyclooxygenase inhibitor, indomethacin, PM6/13 inhibited platelet aggregation induced by thrombin (0.2 U/ml), collagen (10 [H9262]g/ml) and U46619 (3 [H9262]M) with EC50 = 4, 8 and 4 [H9262]g/ml respectively, without affecting [14C]5-hydroxytryptamine secretion or [3H]arachidonate release in appropriately labelled cells. Studies in Fura 2-labelled platelets revealed that elevation of intracellular calcium by ADP, thrombin or U46619 was unaffected by PM6/13 suggesting that the epitope recognised by the antibody did not influence Ca2+ regulation. In agreement with the results from the platelet aggregation studies, PM6/13 was found to potently inhibit binding of 125I-fibrinogen to ADP activated platelets. Binding of this ligand was also inhibited by two other MAbs tested, namely SZ-21 (also to GPIIIa) and PM6/248 (to the GPIIb-IIIa complex). However when tested against binding of 125I-fibronectin to thrombin stimulated platelets, PM6/13 was ineffective in contrast with SZ-21 and PM6/248, that were both potent inhibitors. This suggested that the epitopes recognised by PM6/13 and SZ-21 on GPIIIa were distinct. Studies employing proteolytic dissection of 125I-labelled GPIIIa by trypsin followed by immunoprecipitation with PM6/13 and analysis by SDS-PAGE, revealed the presence of four fragments at 70, 55, 30 and 28 kDa. PM6/13 did not recognize any protein bands on Western blots performed under reducing conditions. However Western blotting analysis with PM6/13 under non-reducing conditions revealed strong detection of the parent GP IIIa molecule, of trypsin treated samples revealed recognition of an 80 kDa fragment at 1 min, faint recognition of a 60 kDa fragment at 60 min and no recognition of any product at 18 h treatment. Under similar conditions, SZ-21 recognized fragments at 80, 75 and 55 kDa with the 55kDa species persisting even after 18 h trypsin treatment. These studies confirm the epitopes recognised by PM6/13 and SZ-21 to be distinct and that PM6/13 represents a useful tool to differentiate the characteristics of fibrinogen and fibronectin binding to the GPIIb-IIIa complex on activated platelets.

Expression of Platelet Membrane Glycoprotein V in Human Megakaryocytes and Megakaryocytic Cell Lines: A Study Using a Novel Monoclonal Antibody against GPV

1994 ◽  
Vol 72 (05) ◽  
pp. 762-769 ◽  
Author(s):  
Toshiro Takafuta ◽  
Kingo Fujirmura ◽  
Hironori Kawano ◽  
Masaaki Noda ◽  
Tetsuro Fujimoto ◽  
...  
Keyword(s):  
Monoclonal Antibody ◽  
Cell Lines ◽  
Immunohistochemical Analysis ◽  
Specific Protein ◽  
Platelet Membrane ◽  
Rt Pcr ◽  
Chain Reaction ◽  
Flow Cytometric ◽  
Polymerase Chain ◽  
Megakaryocytic Cell

SummaryGlycoprotein V (GPV) is a platelet membrane protein with a molecular weight of 82 kD, and one of the leucine rich glycoproteins (LRG). By reverse transcription-polymerase chain reaction (RT-PCR), GPV cDNA was amplified from mRNA of platelets and megakaryocytic cell lines. However, since there are few reports indicating whether GPV protein is expressed in megakaryocytes as a lineage and maturation specific protein, we studied the GPV expression at the protein level by using a novel monoclonal antibody (1D9) recognizing GPV. Flow cytometric and immunohistochemical analysis indicated that GPV was detected on the surface and in the cytoplasm of only the megakaryocytes in bone marrow aspirates. In a megakaryocytic cell line UT-7, GPV antigen increased after treatment with phorbol-12-myri-state-13-acetate (PMA). These data indicate that only megakaryocytes specifically express the GPV protein among hematopoietic cells and that the expression of GPV increases with differentiation of the megakaryocyte as GPIb-IX complex.

Immunochemical characterization of anti-islet cell surface monoclonal antibody from nonobese diabetic mice

Diabetes ◽  
1986 ◽  
Vol 35 (5) ◽  
pp. 517-522 ◽  
Author(s):  
J. Hari ◽  
K. Yokono ◽  
K. Yonezawa ◽  
K. Amano ◽  
S. Yaso ◽  
...  
Keyword(s):  
Monoclonal Antibody ◽  
Cell Surface ◽  
Islet Cell ◽  
Diabetic Mice ◽  
Immunochemical Characterization ◽  
Nonobese Diabetic ◽  
Nonobese Diabetic Mice

scholarly journals Characterization of Native Reversible Self-Association of a Monoclonal Antibody Mediated by Fab-Fab Interaction

2020 ◽  
Vol 109 (1) ◽  
pp. 443-451 ◽  
Author(s):  
Lorenzo Gentiluomo ◽  
Dierk Roessner ◽  
Werner Streicher ◽  
Sujata Mahapatra ◽  
Pernille Harris ◽  
...  
Keyword(s):  
Monoclonal Antibody ◽  
Self Association

Development of monoclonal antibody against IgT of a perciform fish, large yellow croaker (Larimichthys crocea) and characterization of IgT+ B cells

2021 ◽  
Vol 119 ◽  
pp. 104027
Author(s):  
Qiuling Fu ◽  
Zuyun Wei ◽  
Yuhong Chen ◽  
Jingguang Xie ◽  
Xiangyang Zhang ◽  
...  
Keyword(s):  
Monoclonal Antibody ◽  
B Cells ◽  
Large Yellow Croaker ◽  
Larimichthys Crocea
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