Rat IL-3 Biotinylated Antibody Summary
Accession # NP_113701
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Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
IL‑3 in Rat Splenocytes. IL-3 was detected in immersion fixed rat splenocytes using Goat Anti-Rat IL-3 Biotinylated Antigen Affinity-purified Polyclonal Antibody (Catalog # BAF2524) at 15 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Streptavidin (red; Catalog # NL999) and counterstained with DAPI (blue). Specific staining was localized to cell surfaces. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.
Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Rat interleukin-3 (IL-3; also multi-CSF) is a 26 kDa, variably glycosylated monomeric polypeptide that belongs to the alpha -helix family of hematopoietic cytokines (1, 2). IL-3 has pleiotrophic activies on a number of hematopoietic-related cells (1, 3). The rat molecule has two alternate splice forms. The first is termed IL-3 beta and is synthesized as a 169 amino acid (aa) precursor that contains a 27 aa signal sequence and a 142 aa mature segment (1, 2). The second is called IL-3 alpha, and is identical to IL-3 beta, save for a three amino acid (Tyr-Pro-Gln) deletion at positions 56-58 (1). The beta form is considered the most common form. Each form has an alpha -helical structure with two intrachain disulfide bonds and two potential N-linked glycosylation sites. Rat IL-3 is generally considered to be species-specific in its activity. In the mature region, rat IL-3 shares 55%, 30%, and 24% aa sequence identity with mouse, human, and bovine IL-3, respectively. Cells known to express IL-3 include connective tissue mast cells, astrocytes, microglia, megakaryocytes, eosinophils, T cells, keratinocytes and thymic epithelium.
IL-3 exerts its biological activities by binding to a 70 kDa, low affinity, ligand-binding IL-3 R alpha subunit, (6) which then recruits a 120 kDa, common beta -chain, signal transducing subunit (7) to form a functional IL-3 receptor (1, 6, 7). Receptors for IL-3 are present on bone marrow progenitors, macrophages, mast cells, eosinophils, megakaryocytes, basophils, and various myeloid leukemic cells. IL-3 can stimulate the proliferation and differentiation of pluripotent hematopoietic stem cells as well as various lineage committed progenitors including those for neutrophils, macrophages, magakaryocytes, and erythroid cells. IL-3 can stimulate the growth of early B cells and mature macrophages, mast cells, eosinophils, basophils, and megakaryocytes. IL-3 augments the function activity of basophils, mast cells, eosinophils, and macrophages (1, 8). In combination with other molecules such as CD40L and or IL-4, IL-3 can stimulate production of dendritic cells (1, 2, 9, 10).
- Martinez-Moczygemba, M. and D.P. Huston (2003) J. Allergy Clin. Immunol. 112:653.
- Mangi, M.H. and A.C. Newland (1999) Cytokines Cell. Mol. Ther. 5:87.
- Esandi, M. del C. et al. (1998) Gene 211:151.
- Cohen, D.R. et al. (1986) Nucleic Acids Res. 14:3641.
- Gebicke-Haerter, P.J. et al. (1994) J. Neuroimmunol. 50:203.
- Chritton, S.C. and M.H. Sheng (1997) GenBank Accession # NP_640353.
- Appel, K. et al. (1995) J. Neurosci. 15:5800.
- Schrader, J.W. (2001) in Cytokine Reference, Oppenhiem, J.J. and M. Feldmann (eds): Academic Press, p. 855.
- Ebner, S. et al. (2002) J. Immunol. 168:6199.
- Buelens C. et. al. (2002) Blood 99:993.
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