Increased CD133 expression in bone marrow of myelodysplastic syndromes.
Fresh frozen bone marrow biopsies were evaluated immunohistochemically, applying monoclonal antibodies against CD31, CD34, VEGFR-2 and CD133, a novel marker identifying human endothelial progenitor cells (EPCs). Specimens of 51 patients diagnosed with MDS were compared with 16 AML and 18 controls. The percentage of CD34 expressing cells was increased and CD31 expression was decreased in advanced stages of MDS compared with normal BM. VEGFR-2 expression was also raised in MDS. Here we show for the first time that increased numbers of CD133 positive cells are present in the majority of MDS patients. Additionally, those cells occasionally seem to contribute to capillary forming units in bone marrow.
Auberger
J
J
Department of Internal Medicine, Divisions of General Internal Medicine and Haematology and Oncology, Innsbruck Medical University, Anichstrasse 35, 6020 Innsbruck, Austria.
Dlaska
M
M
Auberger
T
T
Gunsilius
E
E
Wöll
E
E
Hilbe
W
W
D000071916:AC133 Antigen; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015703:Antigens, CD / Q000276:immunology*; D018952:Antigens, CD34 / Q000276:immunology; D001853:Bone Marrow / Q000276:immunology*; D005260:Female; D006023:Glycoproteins / Q000276:immunology*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009190:Myelodysplastic Syndromes / Q000276:immunology*; D010455:Peptides / Q000276:immunology*; D019408:Platelet Endothelial Cell Adhesion Molecule-1 / Q000276:immunology; D040301:Vascular Endothelial Growth Factor Receptor-2 / Q000276:immunology
D000071916:AC133 Antigen; D015703:Antigens, CD; D018952:Antigens, CD34; D006023:Glycoproteins; C000606023:PROM1 protein, human; D010455:Peptides; D019408:Platelet Endothelial Cell Adhesion Molecule-1; D040301:Vascular Endothelial Growth Factor Receptor-2