Abstract
Thrombospondin (TSP) is a glycoprotein released from platelets after thrombin-induced aggregation. Endothelial culture studies suggest that it or a similar protein may also be produced by endothelial cells. The origin of the glycoprotein is therefore of some importance. This report concerns the immunohistochemical localisation of TSP within megakaryocytes and platelets. TSP would appear to be a primary platelet protein of megakaryocyte origin, rather than a substance taken up by the platelet in the circulation. The relation of this molecule to the endothelial glycoprotein remains to be established, but our preliminary immunohistochemical studies suggest that the molecule is also located in vascular endothelium.
Full text
PDF


Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Baenziger N. L., Brodie G. N., Majerus P. W. Isolation and properties of a thrombin-sensitive protein of human platelets. J Biol Chem. 1972 May 10;247(9):2723–2731. [PubMed] [Google Scholar]
- Birdwell C. R., Gospodarowicz D., Nicolson G. L. Identification, localization, and role of fibronectin in cultured bovine endothelial cells. Proc Natl Acad Sci U S A. 1978 Jul;75(7):3273–3277. doi: 10.1073/pnas.75.7.3273. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Brown M. S., Deuel T. F., Basu S. K., Goldstein J. L. Inhibition of the binding of low-density lipoprotein to its cell surface receptor in human fibroblasts by positively charged proteins. J Supramol Struct. 1978;8(3):223–234. doi: 10.1002/jss.400080302. [DOI] [PubMed] [Google Scholar]
- Dawes J., Pumphrey C. W., McLaren K. M., Prowse C. V., Pepper D. S. The in vivo release of human platelet factor 4 by heparin. Thromb Res. 1982 Jul 1;27(1):65–76. doi: 10.1016/0049-3848(82)90279-1. [DOI] [PubMed] [Google Scholar]
- Gartner T. K., Gerrard J. M., White J. G., Williams D. C. Fibrinogen is the receptor for the endogenous lectin of human platelets. Nature. 1981 Feb 19;289(5799):688–690. doi: 10.1038/289688a0. [DOI] [PubMed] [Google Scholar]
- Gerrard J. M., Phillips D. R., Rao G. H., Plow E. F., Walz D. A., Ross R., Harker L. A., White J. G. Biochemical studies of two patients with the gray platelet syndrome. Selective deficiency of platelet alpha granules. J Clin Invest. 1980 Jul;66(1):102–109. doi: 10.1172/JCI109823. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gogstad G. O., Hagen I., Korsmo R., Solum N. O. Characterization of the proteins of isolated human platelet alpha-granules. Evidence for a separate alpha-granule-pool of the glycoproteins IIb and IIIa. Biochim Biophys Acta. 1981 Sep 29;670(2):150–162. doi: 10.1016/0005-2795(81)90003-9. [DOI] [PubMed] [Google Scholar]
- Hagen I., Olsen T., Solum N. O. Studies on subcellular fractions of human platelets by the lactoperoxidase-iodination technique. Biochim Biophys Acta. 1976 Nov 11;455(1):214–225. doi: 10.1016/0005-2736(76)90165-6. [DOI] [PubMed] [Google Scholar]
- Jaffe E. A., Leung L. L., Nachman R. L., Levin R. I., Mosher D. F. Thrombospondin is the endogenous lectin of human platelets. Nature. 1982 Jan 21;295(5846):246–248. doi: 10.1038/295246a0. [DOI] [PubMed] [Google Scholar]
- McLaren K. M., Pepper D. S. Immunological localisation of beta-thromboglobulin and platelet factor 4 in human megakaryocytes and platelets. J Clin Pathol. 1982 Nov;35(11):1227–1231. doi: 10.1136/jcp.35.11.1227. [DOI] [PMC free article] [PubMed] [Google Scholar]
- McPherson J., Sage H., Bornstein P. Isolation and characterization of a glycoprotein secreted by aortic endothelial cells in culture. Apparent identity with platelet thrombospondin. J Biol Chem. 1981 Nov 10;256(21):11330–11336. [PubMed] [Google Scholar]
- Mosher D. F., Doyle M. J., Jaffe E. A. Synthesis and secretion of thrombospondin by cultured human endothelial cells. J Cell Biol. 1982 May;93(2):343–348. doi: 10.1083/jcb.93.2.343. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Phillips D. R., Jennings L. K., Prasanna H. R. Ca2+-mediated association of glycoprotein G (thrombinsensitive protein, thrombospondin) with human platelets. J Biol Chem. 1980 Dec 25;255(24):11629–11632. [PubMed] [Google Scholar]
- Piovella F., Ascari E., Sitar G. M., Malamani G. D., Cattaneo G., Magliulo E., Storti E. Immunofluorescent detection of factor VIII-related antigen in human platelets and megakaryoctes. Haemostasis. 1974;3(5-6):288–295. doi: 10.1159/000214067. [DOI] [PubMed] [Google Scholar]
- Ryo R., Proffitt R. T., Poger M. E., O'Bear R., Deuel T. F. Platelet factor 4 antigen in megakaryocytes. Thromb Res. 1980 Mar 1;17(5):645–652. doi: 10.1016/0049-3848(80)90367-9. [DOI] [PubMed] [Google Scholar]
- Sage H., Crouch E., Bornstein P. Collagen synthesis by bovine aortic endothelial cells in culture. Biochemistry. 1979 Nov 27;18(24):5433–5442. doi: 10.1021/bi00591a028. [DOI] [PubMed] [Google Scholar]



