Flow Cytometry and Surface-Marker Phenotyping Using Monoclonal Antibodies: A Combined Approach to Precisely Define the State of the Immune System1

2015 ◽  
pp. 51-78
Author(s):  
M. R. Hadam
Keyword(s):  
Flow Cytometry ◽  
Monoclonal Antibodies ◽  
The State ◽  
Surface Marker ◽  
Combined Approach

scholarly journals The expression and modulation of human myeloid-specific antigens during differentiation of the HL-60 cell line

Blood ◽  
1983 ◽  
Vol 61 (6) ◽  
pp. 1215-1221
Author(s):  
RF Graziano ◽  
ED Ball ◽  
MW Fanger
Keyword(s):  
Flow Cytometry ◽  
Monoclonal Antibodies ◽  
Retinoic Acid ◽  
Cell Surface ◽  
Cell Line ◽  
Surface Marker ◽  
Myeloid Differentiation ◽  
Dimethyl Formamide ◽  
Specific Antigens ◽  
Chemical Mediators

Antigenic changes detected by myeloid-specific monoclonal antibodies on HL-60 cells induced to differentiate by various chemical mediators were investigated using flow cytometry. Antigen levels detected by monocyte- granulocyte-specific monoclonal antibodies AML-2–23, 61D3, and 63D3 increased dramatically after differentiation of HL-60 cells along the granulocytic pathway by the addition of dimethyl formamide (DMF), dimethylsulfoxide (DMSO), or cis-retinoic acid. The expression of these same antigens also increased in conjunction with monocytoid differentiation when HL-60 cells were treated with supernatants from leukocytes stimulated with phytohemagglutinin (PHA-LCM) or with mixed lymphocyte conditioned medium (MLC). In contrast, treatment of HL-60 cells with phorbol 12-myristate 13-acetate (PMA), which also induced differentiation along the monocyte pathway, had no effect on the expression of these monocyte-associated antigens. The expression of antigens on HL-60 cells recognized by the granulocyte-specified monoclonal antibodies PMN 6 and PMN 29 decreased after treatment of HL- 60 cells with PMA, but remained constant after treatment with DMF, DMSO, cis-retinoic acid, PHA-LCM, or MLC. These results suggest that normal myeloid differentiation may be dependent on various signals and that morphological and cell surface marker maturity may, under some conditions, be separable. The utility of the HL-60 cell line as a model of myeloid differentiation and for evaluation of inductive signals is discussed.

scholarly journals The expression and modulation of human myeloid-specific antigens during differentiation of the HL-60 cell line

Blood ◽  
1983 ◽  
Vol 61 (6) ◽  
pp. 1215-1221 ◽  
Author(s):  
RF Graziano ◽  
ED Ball ◽  
MW Fanger
Keyword(s):  
Flow Cytometry ◽  
Monoclonal Antibodies ◽  
Retinoic Acid ◽  
Cell Surface ◽  
Cell Line ◽  
Surface Marker ◽  
Myeloid Differentiation ◽  
Dimethyl Formamide ◽  
Specific Antigens ◽  
Chemical Mediators

Abstract Antigenic changes detected by myeloid-specific monoclonal antibodies on HL-60 cells induced to differentiate by various chemical mediators were investigated using flow cytometry. Antigen levels detected by monocyte- granulocyte-specific monoclonal antibodies AML-2–23, 61D3, and 63D3 increased dramatically after differentiation of HL-60 cells along the granulocytic pathway by the addition of dimethyl formamide (DMF), dimethylsulfoxide (DMSO), or cis-retinoic acid. The expression of these same antigens also increased in conjunction with monocytoid differentiation when HL-60 cells were treated with supernatants from leukocytes stimulated with phytohemagglutinin (PHA-LCM) or with mixed lymphocyte conditioned medium (MLC). In contrast, treatment of HL-60 cells with phorbol 12-myristate 13-acetate (PMA), which also induced differentiation along the monocyte pathway, had no effect on the expression of these monocyte-associated antigens. The expression of antigens on HL-60 cells recognized by the granulocyte-specified monoclonal antibodies PMN 6 and PMN 29 decreased after treatment of HL- 60 cells with PMA, but remained constant after treatment with DMF, DMSO, cis-retinoic acid, PHA-LCM, or MLC. These results suggest that normal myeloid differentiation may be dependent on various signals and that morphological and cell surface marker maturity may, under some conditions, be separable. The utility of the HL-60 cell line as a model of myeloid differentiation and for evaluation of inductive signals is discussed.

Internalization of an Anti-Glycoprotein IIb/IIIa Antibody by HEL Cells

1995 ◽  
Vol 73 (02) ◽  
pp. 291-296 ◽  
Author(s):  
Kenjiro Hamamoto ◽  
Shosaku Nomura ◽  
Masahiko Suzuki ◽  
Shigetoshi Ohga ◽  
Shirou Fukuhara
Keyword(s):  
Flow Cytometry ◽  
Monoclonal Antibodies ◽  
Immunoelectron Microscopy ◽  
Surface Membrane ◽  
Intracellular Pool ◽  
Adhesion Proteins ◽  
Hel Cells

SummaryPlatelets are known to internalize monoclonal antibodies directed against the glycoprotein (GP) IIb/IIIa complex. We investigated whether an antibody directed against this complex (NNKY 2-11) was transported from the surface membrane to the intracellular pool in HEL cells. Flow cytometry showed that the percent binding of NNKY 2-11 to the surface membrane of HEL cells was decreased after incubation for 24 h compared with 1 h, while the binding of an anti-GPIb antibody (NNKY 5-5) did not change. It did not seem likely that the GP Ilb/IIIa complex antibody was shed from the surface membrane of the HEL cells during incubation, because the medium conditioned by incubation with these cells for 24 h showed almost no binding to washed platelets. In addition, immunoelectron microscopy demonstrated that GP IIb/IIIa complex antibodies were incorporated into the intracellular pool of HEL cells and were associated with alpha granules. These findings indicated that an anti-GP IIb/IIIa antibody could be internalized by megakaryocytes, as has been previously shown with platelets, suggesting that megakaryocyte GP IIb/IIIa may act as a carrier for various adhesion proteins.

scholarly journals Contribution of Flow Cytometry to Acute Leukemia Classification in Tunisia

2000 ◽  
Vol 16 (3-4) ◽  
pp. 131-133 ◽  
Author(s):  
S. Feki ◽  
H. El Omri ◽  
M. A. Laatiri ◽  
S. Ennabli ◽  
K. Boukef ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Monoclonal Antibodies ◽  
Age Distribution ◽  
Tunisian Population ◽  
Acute Leukemias ◽  
Flow Cytometric Method ◽  
Technical Innovations ◽  
Definition Of ◽  
Sahel Region ◽  
Cluster Of Differentiation

The precision of immunological characterization of leukemias was improved by a certain number of technical innovations, particularly hybridoma production and standardization, resulting in monoclonal antibodies and definition of recognised cellular antigens (designated by CD: Cluster of Differentiation).The aim of this work was to determine the immunophenotyping profile of patients with leukemia, by means of a flow cytometric method: 66 blood samples coming from leukemic persons in the Sahel region were studied by flow cytometry, using about thirty monoclonal antibodies all marked with a fluorochrome, in one or two colour systems to assess their distribution according to type (lymphoid B or T / myeloid) and age, and to search for possible co-expressions of markers of different lineages.The marked preponderance of childhood B-ALL in our series is, at least partly, attributable to the age distribution of the Tunisian population. In agreement with studies from other countries, the majority of AML cases occurred among adults. A high proportion of AML cases in our series co-expressed markers of other lineages. Overall, accurate classification of acute leukemias was possible from a simple peripheral blood sample in 62 of 66 cases (93.9%).

Mouse Monoclonal Antibodies Against Human c-Mpl and Characterization for Flow Cytometry Applications

Hybridoma ◽  
2010 ◽  
Vol 29 (2) ◽  
pp. 103-113 ◽  
Author(s):  
Christina Abbott ◽  
Guo Huang ◽  
Aaron R. Ellison ◽  
Ching Chen ◽  
Taruna Arora ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Monoclonal Antibodies

scholarly journals A Novel Panel of Rabbit Monoclonal Antibodies and Their Diverse Applications Including Inhibition of Clostridium perfringens Epsilon Toxin Oligomerization

Antibodies ◽  
2018 ◽  
Vol 7 (4) ◽  
pp. 37 ◽  
Author(s):  
Jennifer Linden ◽  
Kiel Telesford ◽  
Samantha Shetty ◽  
Paige Winokour ◽  
Sylvia Haigh ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Cell Death ◽  
Monoclonal Antibodies ◽  
Western Blot ◽  
Clostridium Perfringens ◽  
Specificity And Sensitivity ◽  
Epsilon Toxin ◽  
Blocking Antibodies

The pore-forming epsilon toxin (ETX) produced by Clostridium perfringens is among the most lethal bacterial toxins known. Sensitive antibody-based reagents are needed to detect toxin, distinguish mechanisms of cell death, and prevent ETX toxicity. Using B-cell immuno-panning and cloning techniques, seven ETX-specific monoclonal antibodies were generated from immunized rabbits. ETX specificity and sensitivity were evaluated via western blot, ELISA, immunocytochemistry (ICC), and flow cytometry. ETX-neutralizing function was evaluated both in vitro and in vivo. All antibodies recognized both purified ETX and epsilon protoxin via western blot with two capable of detecting the ETX-oligomer complex. Four antibodies detected ETX via ELISA and three detected ETX bound to cells via ICC or flow cytometry. Several antibodies prevented ETX-induced cell death by either preventing ETX binding or by blocking ETX oligomerization. Antibodies that blocked ETX oligomerization inhibited ETX endocytosis and cellular vacuolation. Importantly, one of the oligomerization-blocking antibodies was able to protect against ETX-induced death post-ETX exposure in vitro and in vivo. Here we describe the production of a panel of rabbit monoclonal anti-ETX antibodies and their use in various biological assays. Antibodies possessing differential specificity to ETX in particular conformations will aid in the mechanistic studies of ETX cytotoxicity, while those with ETX-neutralizing function may be useful in preventing ETX-mediated mortality.

scholarly journals Monoclonal Antibodies Generated against Glycoconjugates Recognize Chemical Linkers

Antibodies ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 48
Author(s):  
Jessica Ramadhin ◽  
Vanessa Silva-Moraes ◽  
Thomas Norberg ◽  
Donald Harn
Keyword(s):  
Drug Delivery ◽  
Flow Cytometry ◽  
Monoclonal Antibodies ◽  
Structure And Function ◽  
Enzyme Linked Immunosorbent Assay ◽  
Incomplete Freund’S Adjuvant ◽  
Delivery Platform ◽  
Igg1 Mabs ◽  
Human Milk Oligosaccharide ◽  
And Function

Monoclonal antibodies (mAbs) that recognize glycans are useful tools to assess carbohydrates’ structure and function. We sought to produce IgG mAbs to the human milk oligosaccharide (HMO), lacto-N-fucopentaose III (LNFPIII). LNFPIII contains the Lewisx antigen, which is found on the surface of schistosome parasites. mAbs binding the Lewisx antigen are well-reported in the literature, but mAbs recognizing HMO structures are rare. To generate mAbs, mice were immunized with LNFPIII-DEX (P3DEX) plus CpGs in VacSIM®, a novel vaccine/drug delivery platform. Mice were boosted with LNFPIII-HSA (P3HSA) plus CpGs in Incomplete Freund’s Adjuvant (IFA). Splenocytes from immunized mice were used to generate hybridomas and were screened against LNFPIII conjugates via enzyme-linked immunosorbent assay (ELISA). Three positive hybridomas were expanded, and one hybridoma, producing IgG and IgM antibodies, was cloned via flow cytometry. Clone F1P2H4D8D5 was selected because it produced IgG1 mAbs, but rescreening unexpectedly showed binding to both LNFPIII and lacto-N-neotetraose (LNnT) conjugates. To further assess the specificity of the mAb, we screened it on two glycan microarrays and found no significant binding. This finding suggests that the mAb binds to the acetylphenylenediamine (APD) linker-spacer structure of the conjugate. We present the results herein, suggesting that our new mAb could be a useful probe for conjugates using similar linker spacer structures.

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