CD20 Antibody (rMS4A1/8044)

Name: CD20 Antibody (rMS4A1/8044)
Brand: Novus Biologicals
SKU: NBP3-23744
Price: 399 USD
Availability: InStock

Novus Biologicals | Catalog # NBP3-23744

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Product Documents

Recombinant Monoclonal Antibody

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Product Specifications
Scientific Data
Applications
Preparation & Storage
Background
Product Documents
Specific Notices
Research Areas
Related Blogs

Key Product Details

Species Reactivity

Human

Applications

Immunohistochemistry-Paraffin

Label

Unconjugated

Antibody Source

Recombinant Monoclonal Mouse IgG₁ kappa Clone # rMS4A1/8044

View all CD20 Primary Antibodies »

Product Specifications

Immunogen

Recombinant fragment (around aa200-297) of human CD20 protein (exact sequence is proprietary)

Localization

Cell Surface

Marker

B-Cell Marker

Specificity

This monoclonal antibody can be used for immunophenotyping of leukemia and malignant cells, B lymphocyte detection in peripheral blood and B cell localization in tissues. It reacts with the majority of B-cells present in peripheral blood and lymphoid tissues and their derived lymphomas. In lymphoid tissue, germinal center blasts and B-immunoblasts are particularly reactive. It is a reliable antibody for ascribing a B-cell phenotype in known lymphoid tissues. Rarely, CD20-positive T-cell lymphomas have been reported. Reactivity has also been noted with Reed-Sternberg cells in cases of Hodgkin s disease, particularly of lymphocyte predominant type.

Clonality

Monoclonal

Host

Mouse

Isotype

IgG₁ kappa

Description

Store at 2 to 8C. Non-hazardous. No MSDS required.

Scientific Data Images for CD20 Antibody (rMS4A1/8044)

Immunohistochemistry-Paraffin: CD20 Antibody (rMS4A1/8044) [NBP3-23744] -

Immunohistochemistry-Paraffin: CD20 Antibody (rMS4A1/8044) [NBP3-23744] - Formalin-fixed, paraffin-embedded human tonsil stained with CD20 Antibody (rMS4A1/8044). Inset: PBS instead of primary antibody; secondary only negative control.

Western Blot: CD20 Antibody (rMS4A1/8044) [NBP3-23744] -

Western Blot Analysis of Raji cell lysate using CD20 Antibody (rMS4A1/8044).

Western Blot: CD20 Antibody (rMS4A1/8044) [NBP3-23744] -

Western Blot Analysis of Raji cell lysate using CD20 Antibody (rMS4A1/8044).

Applications for CD20 Antibody (rMS4A1/8044)

Application

Recommended Usage

Immunohistochemistry-Paraffin

1-2ug/ml

Application Notes

Immunohistochemistry-Paraffin: 1-2ug/ml for 30 minutes at RT. Staining of formalin-fixed tissues requires heating tissue sections in 10mM Tris with 1mM EDTA, pH 9.0, for 45 min at 95C followed by cooling at RT for 20 minutes. Optimal dilution for a specific application should be determined.

Formulation, Preparation, and Storage

Purification

Protein A purified

Formulation

10mM PBS with 0.05% BSA

Preservative

0.05% Sodium Azide

Concentration

0.2 mg/ml

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store at 4C.

Background: CD20

CD20 is a non-glycosylated phosphoprotein that is expressed on the surface of normal and malignant B cells and functions in mediating calcium transport and B cell differentiation (1,2). CD20 is encoded by the membrane-spanning 4-domain family A member 1 (MS4A1) gene and, in humans, is located on chromosome 11q12 (1). The CD20 protein is 297 amino acids (aa) in length with a theoretical molecular weight (MW) of 33 kDa (1,2). Structurally, the CD20 protein has four membrane-spanning domains, two extracellular loop domains, and intracellular N- and C-terminal domains (1,2). CD20 is expressed at specific stages of B cell maturation including pre-B cells, mature naive and activated B cells, and memory B cells, but is absent from plasmablasts and plasma cells (1,3,4). Expression of CD20 is often increased on malignant B cells associated with various B cell disorders such as chronic lymphocytic leukemia (CLL), multiple sclerosis (MS), and rheumatoid arthritis (2-4). Anti-CD20 monoclonal antibody (mAb)-based therapies have become an appealing target for treating these immune-related disorders and cancers (1-5). Rituximab, a chimeric mAb, was the first FDA approved CD20 monoclonal antibody for the treatment of non-Hodgkin's lymphoma that is now commonly used to treat MS (2,3). Since its initial approval in 1997, several other chimeric and humanized anti-CD20 mAbs have been developed including Ofatumumab, Ublituximab, and Obinutuzumab (1-5). B cell depletion via CD20 mAbs can occur under different mechanisms such as antibody-dependent cellular cytotoxicity (ADCC), antibody-dependent cellular phagocytosis (ADCP), complement-dependent cytotoxicity (CDC), and direct induction of apoptosis (1-4). Many ongoing studies are focused on combination therapies with CD20 mAbs as an addition to chemotherapy, B cell receptor (BCR) signaling inhibitors, or BH3 mimetics (1,2,4). Additionally, the effects of bispecific antibodies and CD20 chimeric antigen receptor (CAR) T cell therapies are under investigation for the treatment of B cell malignancies (4,5).

References

1. Pavlasova G, Mraz M. The regulation and function of CD20: an "enigma" of B-cell biology and targeted therapy. Haematologica. 2020; 105(6):1494-1506. https://doi.org/10.3324/haematol.2019.243543

2. Payandeh Z, Bahrami AA, Hoseinpoor R, et al. The applications of anti-CD20 antibodies to treat various B cells disorders. Biomed Pharmacother. 2019; 109:2415-2426. https://doi.org/10.1016/j.biopha.2018.11.121

3. Margoni M, Preziosa P, Filippi M, Rocca MA. Anti-CD20 therapies for multiple sclerosis: current status and future perspectives. J Neurol. 2022; 269(3):1316-1334. https://doi.org/10.1007/s00415-021-10744-x

4. Klein C, Jamois C, Nielsen T. Anti-CD20 treatment for B-cell malignancies: current status and future directions. Expert Opin Biol Ther. 2021; 21(2):161-181. https://doi.org/10.1080/14712598.2020.1822318

5. Sharman JP. Targeting CD20: teaching an old dog new tricks. Hematology Am Soc Hematol Educ Program. 2019; 2019(1):273-278. https://doi.org/10.1182/hematology.2019000031

Long Name

Cluster of Differentiation 20

Alternate Names

B1, Bp35, CD20, LEU-16, Ly-44, MS4A1, S7

Gene Symbol

MS4A1

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Product Specific Notices for CD20 Antibody (rMS4A1/8044)

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.