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Chinese Journal of Hematology ; (12): 179-182, 2002.
Article Dans Chinois | WPRIM | ID: wpr-261433

Résumé

<p><b>OBJECTIVE</b>To investigate the effect of antisense vascular endothelial growth factor (VEGF)(121) cDNA transfection on the growth of K562 cells in nude mice.</p><p><b>METHODS</b>K562 cells transfected with the antisense (AS) or sense (S) VEGF(121) cDNA, and the vector (V, pcDNA3) alone were transplanted subcutaneously into nude mice and the growth of the transfected cells in vivo was investigated. The effects of transfected K562 cells on human bone marrow endothelial cells (BMEC) were analyzed by MTT assay, the microvessel density (MVD) in tumor mass by vWF immunohistochemistry stain.</p><p><b>RESULTS</b>K562/V tumor grew more slowly [(207.5 +/- 192.9) mm(3) vs (445.0 +/- 150.9) mm(3), P < 0.05] and K562/S tumor more rapidly than K562/V tumor did [(1 174.6 +/- 508.7)/mm(3) vs (445.0 +/- 150.9) mm(3), P < 0.01]. K562/S cell culture supernatant was more strongly in promoting the proliferation of BMEC than K562/V supernatant did, but K562/AS supernatant resulted in a marked decrease of the promoting effect as compared with K562/V's. The MVDs in K562/AS, K562/S, and K562/V tumors were [(11.0 +/- 7.6)/0.72 mm(2) vs (50.8 +/- 11.7)/0.72 mm(2) vs (18.9 +/- 7.0)/0.72 mm(2)], respectively.</p><p><b>CONCLUSIONS</b>Antisense VEGF(121) cDNA transfected K562 cells show growth retardation in transplanted nude mice, decrease of tumor MVD, and decrease of promoting BMEC proliferation capacity.</p>


Sujets)
Animaux , Femelle , Humains , Souris , Cellules de la moelle osseuse , Biologie cellulaire , Division cellulaire , Génétique , Physiologie , Milieux de culture conditionnés , Pharmacologie , ADN antisens , Génétique , ADN complémentaire , Génétique , Facteurs de croissance endothéliale , Génétique , Physiologie , Endothélium vasculaire , Biologie cellulaire , Cellules K562 , Lymphokines , Génétique , Physiologie , Souris de lignée BALB C , Souris nude , Transplantation tumorale , Tumeurs expérimentales , Génétique , Anatomopathologie , Néovascularisation pathologique , Génétique , Transfection , Facteur de croissance endothéliale vasculaire de type A , Facteurs de croissance endothéliale vasculaire
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