Damková, M*
Dotaz
Zobrazit nápovědu
Receptor-mediated endocytosis was employed for a highly efficient transport of oligodeoxynucleotides into hepatoma cell line PLC/PRF/5. The oligodeoxynucleotides were bound to the asialofetuin-poly-L-lysine conjugate and this complex was internalized by the cells via asialoglycoprotein receptor, an endocytic receptor unique for hepatocytes. Binding of the oligodeoxynucleotides to the complex dramatically increased their cellular uptake more than 20-fold. Chloroquine, a lysosomatropic agent, further increased the transport of the complex but not of the free oligodeoxynucleotides.
- MeSH
- alfa-fetoproteiny metabolismus MeSH
- asialoglykoproteinový receptor MeSH
- asialoglykoproteiny metabolismus MeSH
- buněčné linie MeSH
- chlorochin metabolismus MeSH
- DNA virů genetika MeSH
- endocytóza * MeSH
- fetuiny MeSH
- hepatitida B genetika MeSH
- játra metabolismus MeSH
- molekulární sekvence - údaje MeSH
- nosiče léků metabolismus MeSH
- oligodeoxyribonukleotidy metabolismus MeSH
- polylysin metabolismus MeSH
- receptory imunologické metabolismus MeSH
- sekvence nukleotidů MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- alfa-fetoproteiny MeSH
- asialofetuin MeSH Prohlížeč
- asialoglykoproteinový receptor MeSH
- asialoglykoproteiny MeSH
- chlorochin MeSH
- DNA virů MeSH
- fetuiny MeSH
- nosiče léků MeSH
- oligodeoxyribonukleotidy MeSH
- polylysin MeSH
- receptory imunologické MeSH
PDGF-like activity was investigated in conditioned media of cell cultures derived from 4 human renal carcinomas. Transient production of PDGF-like factor was found only in the cell line derived from a subcutaneously growing metastasis. Further analysis of this cell line showed an increase of PDGF (A) gene activity in one cellular clone.
- MeSH
- destičkový růstový faktor biosyntéza genetika MeSH
- DNA sondy MeSH
- karcinom metabolismus sekundární MeSH
- kultivační média MeSH
- lidé MeSH
- nádorové buňky kultivované MeSH
- nádory kůže metabolismus sekundární MeSH
- nádory ledvin metabolismus MeSH
- northern blotting MeSH
- regulace genové exprese MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- destičkový růstový faktor MeSH
- DNA sondy MeSH
- kultivační média MeSH
- platelet-derived growth factor A MeSH Prohlížeč
- MeSH
- experimentální nádory chemicky indukované MeSH
- inbrední kmeny potkanů MeSH
- krysa rodu Rattus MeSH
- transplantace nádorů * MeSH
- železo-dextranový komplex * MeSH
- zvířata MeSH
- Check Tag
- krysa rodu Rattus MeSH
- zvířata MeSH
- Publikační typ
- anglický abstrakt MeSH
- časopisecké články MeSH
- Názvy látek
- železo-dextranový komplex * MeSH
In cells derived from two human renal carcinomas only the precursor form of epidermal growth factor (EGF) was found. The binding assay revealed a high level of EGF receptor expression in both cell types tested. However, these receptors are not involved in the growth activity of the cells under in vitro conditions used. The source of DNA synthesis-stimulating activity found in conditioned media of the cells tested is discussed with respect to possible participation of TGF beta.
- MeSH
- buněčné dělení MeSH
- buněčné linie MeSH
- epidermální růstový faktor biosyntéza farmakologie MeSH
- erbB receptory biosyntéza účinky léků metabolismus MeSH
- karcinom z renálních buněk metabolismus MeSH
- kinetika MeSH
- lidé MeSH
- nádory ledvin metabolismus MeSH
- suramin farmakologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- epidermální růstový faktor MeSH
- erbB receptory MeSH
- suramin MeSH
Recently, increasing attention has been devoted to mastering a new technique of optical delivery of micro-objects tractor-beam'1, 2, 3, 4, 5, 6, 7, 8, 9. Such beams have uniform intensity profiles along their propagation direction and can exert a negative force that, in contrast to the familiar pushing force associated with radiation pressure, pulls the scatterer toward the light source. It was experimentally observed that under certain circumstances, the pulling force can be significantly enhanced6 if a non-spherical scatterer, for example, a linear chain of optically bound objects10, 11, 12, is optically transported. Here we demonstrate that motion of two optically bound objects in a tractor beam strongly depends on theirs mutual distance and spatial orientation. Such configuration-dependent optical forces add extra flexibility to our ability to control matter with light. Understanding these interactions opens the door to new applications involving the formation, sorting or delivery of colloidal self-organized structures.
- Publikační typ
- časopisecké články MeSH