Abstract
A new prototype of polymer-derived drug delivery system, the nanoconjugate Polycefin, was tested for its ability to accumulate in tumors based on enhanced permeability and retention (EPR) effect and receptor mediated endocytosis. Polycefin was synthesized for targeted delivery of Morpholino antisense oligonucleotides into certain tumors. It consists of units that are covalently conjugated with poly(β-l-malic acid) (Mw 50,000, Mw/Mn 1.3) highly purified from cultures of myxomycete Physarum polycephalum. The units are active in endosomal uptake, disruption of endosomal membranes, oligonucleotide release in the cytoplasm, and protection against enzymatic degradation in the vascular system. The polymer is biodegradable, non-immunogenic and non-toxic. Polycefin was also coupled with AlexaFluor 680 C2-maleimide dye for in vivo detection. Nude mice received subcutaneous injections of MDA-MB 468 human breast cancer cells into the left posterior mid-dorsum or intracranial injections of human glioma cell line U87MG. Polycefin at concentration of 2.5 mg/kg was injected via the tail vein. In vivo fluorescence tumor imaging was performed at different time points, 0-180 min up to 24 h after the drug injection. The custom-made macro-illumination imaging MISTI system was used to examine the in vivo drug accumulation in animals bearing human breast and brain tumors. In breast tumors the fluorescence signal in large blood vessels and in the tumor increased rapidly until 60 min and remained in the tumor at a level 6 times higher than in non-tumor tissue (180 min) (p < 0.003). In brain tumors drug accumulated selectively in 24 h without any detectable signal in non-tumor areas. The results of live imaging were corroborated histologically by fluorescence microscopic examination of various organs. In addition to tumors, only kidney and liver showed some fluorescent signal.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 195-203 |
| Number of pages | 9 |
| Journal | Chemico-Biological Interactions |
| Volume | 171 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 30 2008 |
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Keywords
- Brain glioma
- Breast cancer
- Drug delivery system
- EPR effect
- Fluorescence imaging
- Poly(malic acid)
ASJC Scopus subject areas
- Toxicology
Cite this
Nanoconjugate based on polymalic acid for tumor targeting. / Ljubimova, Julia Y.; Fujita, Manabu; Khazenzon, Natalya M.; Lee, Bong Seop; Wachsmann-Hogiu, Sebastian; Farkas, Daniel L.; Black, Keith L.; Holler, Eggehard.
In: Chemico-Biological Interactions, Vol. 171, No. 2, 30.01.2008, p. 195-203.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nanoconjugate based on polymalic acid for tumor targeting
AU - Ljubimova, Julia Y.
AU - Fujita, Manabu
AU - Khazenzon, Natalya M.
AU - Lee, Bong Seop
AU - Wachsmann-Hogiu, Sebastian
AU - Farkas, Daniel L.
AU - Black, Keith L.
AU - Holler, Eggehard
PY - 2008/1/30
Y1 - 2008/1/30
N2 - A new prototype of polymer-derived drug delivery system, the nanoconjugate Polycefin, was tested for its ability to accumulate in tumors based on enhanced permeability and retention (EPR) effect and receptor mediated endocytosis. Polycefin was synthesized for targeted delivery of Morpholino antisense oligonucleotides into certain tumors. It consists of units that are covalently conjugated with poly(β-l-malic acid) (Mw 50,000, Mw/Mn 1.3) highly purified from cultures of myxomycete Physarum polycephalum. The units are active in endosomal uptake, disruption of endosomal membranes, oligonucleotide release in the cytoplasm, and protection against enzymatic degradation in the vascular system. The polymer is biodegradable, non-immunogenic and non-toxic. Polycefin was also coupled with AlexaFluor 680 C2-maleimide dye for in vivo detection. Nude mice received subcutaneous injections of MDA-MB 468 human breast cancer cells into the left posterior mid-dorsum or intracranial injections of human glioma cell line U87MG. Polycefin at concentration of 2.5 mg/kg was injected via the tail vein. In vivo fluorescence tumor imaging was performed at different time points, 0-180 min up to 24 h after the drug injection. The custom-made macro-illumination imaging MISTI system was used to examine the in vivo drug accumulation in animals bearing human breast and brain tumors. In breast tumors the fluorescence signal in large blood vessels and in the tumor increased rapidly until 60 min and remained in the tumor at a level 6 times higher than in non-tumor tissue (180 min) (p < 0.003). In brain tumors drug accumulated selectively in 24 h without any detectable signal in non-tumor areas. The results of live imaging were corroborated histologically by fluorescence microscopic examination of various organs. In addition to tumors, only kidney and liver showed some fluorescent signal.
AB - A new prototype of polymer-derived drug delivery system, the nanoconjugate Polycefin, was tested for its ability to accumulate in tumors based on enhanced permeability and retention (EPR) effect and receptor mediated endocytosis. Polycefin was synthesized for targeted delivery of Morpholino antisense oligonucleotides into certain tumors. It consists of units that are covalently conjugated with poly(β-l-malic acid) (Mw 50,000, Mw/Mn 1.3) highly purified from cultures of myxomycete Physarum polycephalum. The units are active in endosomal uptake, disruption of endosomal membranes, oligonucleotide release in the cytoplasm, and protection against enzymatic degradation in the vascular system. The polymer is biodegradable, non-immunogenic and non-toxic. Polycefin was also coupled with AlexaFluor 680 C2-maleimide dye for in vivo detection. Nude mice received subcutaneous injections of MDA-MB 468 human breast cancer cells into the left posterior mid-dorsum or intracranial injections of human glioma cell line U87MG. Polycefin at concentration of 2.5 mg/kg was injected via the tail vein. In vivo fluorescence tumor imaging was performed at different time points, 0-180 min up to 24 h after the drug injection. The custom-made macro-illumination imaging MISTI system was used to examine the in vivo drug accumulation in animals bearing human breast and brain tumors. In breast tumors the fluorescence signal in large blood vessels and in the tumor increased rapidly until 60 min and remained in the tumor at a level 6 times higher than in non-tumor tissue (180 min) (p < 0.003). In brain tumors drug accumulated selectively in 24 h without any detectable signal in non-tumor areas. The results of live imaging were corroborated histologically by fluorescence microscopic examination of various organs. In addition to tumors, only kidney and liver showed some fluorescent signal.
KW - Brain glioma
KW - Breast cancer
KW - Drug delivery system
KW - EPR effect
KW - Fluorescence imaging
KW - Poly(malic acid)
UR - http://www.scopus.com/inward/record.url?scp=38349148359&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38349148359&partnerID=8YFLogxK
U2 - 10.1016/j.cbi.2007.01.015
DO - 10.1016/j.cbi.2007.01.015
M3 - Article
VL - 171
SP - 195
EP - 203
JO - Chemico-Biological Interactions
JF - Chemico-Biological Interactions
SN - 0009-2797
IS - 2
ER -