Human Thrombopoietin/Tpo Antibody Summary
Ser22-Gly353
Accession # P40225
Applications
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.
Scientific Data
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Cell Proliferation Induced by Thrombopoietin and Neutralization by Human Thrombopoietin Antibody. Recombinant Human Thrombopoietin/Tpo (Catalog # 288-TP) stimulates proliferation in the MO7e human mega-karyocytic leukemic cell line in a dose-dependent manner (orange line). Proliferation elicited by Recombinant Human Thrombopoietin/Tpo (10 ng/mL) is neutralized (green line) by increasing concentrations of Human Thrombopoietin/Tpo Antigen Affinity-purified Polyclonal Antibody (Catalog # AF-288-NA). The ND50 is typically 0.05-0.3 µg/mL.
Reconstitution Calculator
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.
Background: Thrombopoietin/Tpo
Thrombopoietin (Tpo), is a key regulator of megakaryocytopoiesis and thrombopoiesis. It is principally produced in the liver and is bound and internalized by the receptor Tpo R/c-mpl. Defects in the Tpo-Tpo R signaling pathway are associated with a variety of platelet disorders (1-3). The 353 amino acid (aa) human Tpo precursor is cleaved to yield the 332 aa mature protein. Mature human Tpo shares approximately 70% aa sequence homology with mouse and rat Tpo. It is an 80-85 kDa protein that consists of an N-terminal domain with homology to Erythropoietin (Epo) and a C-terminal domain that contains multiple N-linked and O-linked glycosylation sites (4, 5). Tissue specific alternate splicing of human Tpo generates multiple isoforms with internal deletions, insertions, and/or C-terminal substitutions (6). Tpo promotes the differentiation, proliferation, and maturation of MK and their progenitors (4, 5, 7). Several other cytokines can promote these functions as well but only in cooperation with Tpo (8, 9). Notably, IL-3 independently induces MK development, although its effects are restricted to early in the MK lineage (8, 9). Tpo additionally promotes platelet production, aggregation, ECM adhesion, and activation (10, 13). It is cleaved by platelet-derived thrombin following Arg191 within the C-terminal domain and subsequently at other sites upon extended digestion (14). Full length Tpo and shorter forms circulate in the plasma (4, 5). TheC-terminal domain is not required for binding to Tpo R or inducing MK growth and differentiation (5). Aside from its hematopoietic effects, Tpo is expressed in the brain where it promotes the apoptosis of hypoxia-sensitized neurons and inhibits neuronal differentiation by blocking NGF induced signaling (15, 16).
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- Kaushansky, K. (2005) J. Clin. Invest. 115:3339.
- Li, J. et al. (1999) Br. J. Haematol. 106:345.
- Bartley, T.D. et al. (1994) Cell 77:1117.
- de Sauvage, F.J. et al. (1994) Nature 369:533.
- Marcucci, R. and M. Romano (2008) Biochim. Biophys. Acta 1782:427.
- Kaushansky, K. et al. (1994) Nature 369:568.
- Kaushansky, K. et al. (1995) Proc. Natl. Acad. Sci. 92:3234.
- Broudy, V.C. et al. (1995), Blood 85:1719.
- Lok, S.I. et al. (1994) Nature 369:565.
- Chen, J. et al. (1995) Blood 86:4054.
- Oda, A. et al. (1996) Blood 87:4664.
- Van Os, E. et al. (2003) Br. J. Haematol. 121:482.
- Kato, T. et al. (1997) Proc. Natl. Acad. Sci. 94:4669.
- Ehrenreich, H. et al. (2005) Proc. Natl. Acad. Sci. 102:862.
- Samoylenko, A. et al. (2008) Cell. Signal. 20:154.
Product Datasheets
Citations for Human Thrombopoietin/Tpo Antibody
R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.
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Citations: Showing 1 - 3
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Plasma concentration of thrombopoietin in dogs with immune thrombocytopenia
Authors: Brooks, MB;Brooks, JC;Catalfamo, J;Zhu, Y;Goggs, R;Babasyan, S;Wagner, B;LeVine, DN;
Journal of veterinary internal medicine
Species: Mouse
Sample Types: Cell Culture Supernates
Applications: Antibody Profiling -
Oncostatin M stimulates proliferation, induces collagen production and inhibits apoptosis of human lung fibroblasts.
Authors: Scaffidi AK, 2019, Mutsaers SE, Moodley YP, McAnulty RJ, Laurent GJ, Thompson PJ, Knight DA
3821-3828, 2002-07-01;136(5):793-801.
Species: Human
Sample Types: Whole Cells
Applications: Neutralization -
CD40-ligand stimulates myelopoiesis by regulating flt3-ligand and thrombopoietin production in bone marrow stromal cells.
Authors: Solanilla A, Dechanet J, El Andaloussi A, Dupouy M, Godard F, Chabrol J, Charbord P, Reiffers J, Nurden AT, Weksler B, Moreau JF, Ripoche J
Blood, 2000-06-15;95(12):3758-64.
Species: Human
Sample Types: Cell Lysates
Applications: Western Blot
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