Human Thrombopoietin/Tpo Antibody
Human Thrombopoietin/Tpo Antibody Summary
Accession # P40225
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.
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.
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 megakaryocytes (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). The C 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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Citation 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.
1 Citation: Showing 1 - 1
Multiple cycles of recombinant human thrombopoietin therapy in a patient with chronic refractory idiopathic thrombocytopenic purpura.
Authors: Hua B, Zou N, Wang S, Zhu T, Zhao Y
Blood Coagul. Fibrinolysis, 2005-06-01;16(4):291-5.
Sample Types: Serum
Applications: ELISA Development
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This is an antibody titration experiment, testing for fluorescent detection with the Odyssey LiCor infrared system. Recombinant human TPO (Cat# 288-TP/CF) was added in decreasing amounts in PBS, ran through a 10-14% denaturing polyacrylamide gel. Transferred onto a PVDF membrane, blotted for the anti-TPO antibody (Cat# MAB2881), and then for anti-mouse antibody (IRDye800CW). The membrane was then imaged by IR fluorescence.