Abstract
Purpose
Anitangiogenic and apoptotic properties of a novel chemically modified heparin derivative with low anticoagulant activity were evaluated on the experimental in vitro and in vivo model.
Materials and Methods
Heparin-lithocholate conjugate (HL) was initially synthesized by covalently bonding lithocholate to heparin. Folate-HL conjugate (FHL) was further synthesized by conjugating folate to HL. Antiangiogenic and apoptotic abilities of HL and FHL were characterized in vitro and in vivo experimentations.
Results
Compared to unmodified heparin, both HL and FHL represented a low anticoagulant activity (38 and 28%, respectively). HL and FHL maintained antiangiogenic activity even further modification from the results of Matrigel plugs assay. FHL specifically induced apoptosis on KB cells having highly expressed folate receptor after cellular internalization. Both administered HL and FHL had similar antiangiogenic activity and inhibitory effect on tumor growth in vivo although FHL induced higher apoptosis on tumor tissues.
Conclusions
In vivo tumor growth inhibition was possibly due to the decrease of vessel density and apoptotic cell death, although antiangiogenic effect of FHL seemed more actively affected on growth inhibition than apoptotic potential in vivo system. Thus, Low anticoagulant FHL having antiangiogenic and apoptotic properties would provide benefits for the development of a new class of anticancer agent.
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Abbreviations
- bFGF:
-
basic fibroblast growth factor
- FBS:
-
fetal bovine serum
- FHL:
-
folate-heparin-lithocholate
- FITC:
-
fluorescein isothiocyanate
- FR:
-
folate receptor
- HL:
-
heparin-lithocholate
- MTT:
-
(3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide)
- PBS:
-
phosphate buffered saline
- PI:
-
propidium iodide
- TUNEL:
-
terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling
- UFH:
-
unfractionated heparin
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Acknowledgements
This study was supported by the grant from Next Generation New Technology Development Program of the Korean Ministry of Commerce, Industry, and Energy (Grant no. 10011353).
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Yu, M.K., Lee, D.Y., Kim, Y.S. et al. Antiangiogenic and Apoptotic Properties of a Novel Amphiphilic Folate-Heparin-Lithocholate Derivative Having Cellular Internality for Cancer Therapy. Pharm Res 24, 705–714 (2007). https://doi.org/10.1007/s11095-006-9190-3
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DOI: https://doi.org/10.1007/s11095-006-9190-3