To enhance transfection efficacy of pDNA through the application of multifunctional peptide-PEG-tris-acridine conjugates (pPAC) and the formation of biodegradable core-shell polyplexes for gene delivery to the blood-brain barrier (BBB).
pPAC-mediated transfection was compositionally optimized in mouse BBB cells (bEnd.3). Cellular uptake and trafficking, and brain accumulation of pDNA was evaluated by fluorescent imaging and histochemistry. We constructed anti-MRP4 siRNA-producing vectors and evaluated the efficacy of MRP4 down-regulation of MRP4 by Western blot and qPCR, and its effect on the uptake of 3H-AZT, an MRP4 substrate.
A core-shell gene delivery system (GDS) was assembled from pDNA and pPAC, carrying multifunctional peptides with NLS, TAT, and brain-specific BH, or ApoE sequences, and biodegradable pLPEI polyamine. This GDS demonstrated better cellular and nuclear accumulation, and a 25-fold higher transfection efficacy in slow-dividing bEnd.3 cells compared to ExGen500. Inclusion of brain-targeting pPAC enhanced in vivo accumulation of functional pDNA in brain capillaries. Treatment by encapsulated anti-MRP4 siRNA-producing pDNA caused transient down-regulation of MRP4, and, after intravenous injection in Balb/c mice, enhanced AZT uptake in the brain by 230–270%.
The pPAC represent novel efficient components of GDS that could find various gene therapy applications, including genetic modulation of the BBB.
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Apolipoprotein E-derived peptide
brain capillary endothelial cells
bovine serum albumin
drug efflux transporters
dynamic light scattering
chemoluminescence detection kit
gene delivery system
green fluorescent protein
highly active antiretroviral therapy
high performance liquid chromatography
SV40 nuclear localization signal peptide
Nucleoside reverse transcriptase inhibitors
Polyacrylamide gel electrophoresis
HIV-1 trans-activator of transcription peptide
Wagner E. Strategies to improve DNA polyplexes for in vivo gene transfer: will “artificial viruses” be the answer? Pharm Res. 2004;21:8–14.
Bremner KH, Seymour LW, Logan A, Read ML. Factors influencing the ability of nuclear localization sequence peptides to enhance nonviral gene delivery. Bioconjug Chem. 2004;15:152–61.
Escriou V, Carriere M, Scherman D, Wils P. NLS bioconjugates for targeting therapeutic genes to the nucleus. Adv Drug Deliv Rev. 2003;55:295–306.
Wadia JS, Dowdy SF. Transmembrane delivery of protein and peptide drugs by TAT-mediated transduction in the treatment of cancer. Adv Drug Deliv Rev. 2005;57:579–96.
Vendeville A, Rayne F, Bonhoure A, Bettache N, Montcourrier P, Beaumelle B. HIV-1 Tat enters T cells using coated pits before translocating from acidified endosomes and eliciting biological responses. Mol Biol Cell. 2004;15:2347–60.
Oupicky D, Ogris M, Seymour LW. Development of long-circulating polyelectrolyte complexes for systemic delivery of genes. J Drug Target. 2002;10:93–8.
Gilmore JL, Yi X, Quan L, Kabanov AV. Novel nanomaterials for clinical neuroscience. J Neuroimmune Pharmacol. 2008;3:83–94.
Loscher W, Potschka H. Drug resistance in brain diseases and the role of drug efflux transporters. Nat Rev Neurosci. 2005;6:591–602.
Kabanov AV, Batrakova EV. New technologies for drug delivery across the blood brain barrier. Curr Pharm Des. 2004;10:1355–63.
Boado RJ. Blood-brain barrier transport of non-viral gene and RNAi therapeutics. Pharm Res. 2007;24:1772–87.
Zhang H, Mitin A, Vinogradov SV. Efficient transfection of blood-brain barrier endothelial cells by lipoplexes and polyplexes in the presence of nuclear targeting NLS-PEG-acridine conjugates. Bioconjug Chem. 2009;20:120–8.
Zhang H, Vinogradov SV. Short biodegradable polyamines for gene delivery and transfection of brain capillary endothelial cells. J Control Release 2010;143:359–66.
Chen Z, Varney ML, Backora MW, Cowan K, Solheim JC, Talmadge JE, Singh RK. Down-regulation of vascular endothelial cell growth factor-C expression using small interfering RNA vectors in mammary tumors inhibits tumor lymphangiogenesis and spontaneous metastasis and enhances survival. Cancer Res. 2005;65:9004–11.
Torchilin VP. Tatp-mediated intracellular delivery of pharmaceutical nanocarriers. Biochem Soc Trans. 2007;35:816–20.
Tiera MJ, Winnik FO, Fernandes JC. Synthetic and natural polycations for gene therapy: state of the art and new perspectives. Curr Gene Ther. 2006;6:59–71.
Lechardeur D, Lukacs GL. Nucleocytoplasmic transport of plasmid DNA: a perilous journey from the cytoplasm to the nucleus. Hum Gene Ther. 2006;17:882–9.
Nguyen J, Xie X, Neu M, Dumitrascu R, Reul R, Sitterberg J, et al. Effects of cell-penetrating peptides and pegylation on transfection efficiency of polyethylenimine in mouse lungs. J Gene Med. 2008;10:1236–46.
Deeva EG, Pavlovskaia V, Kiselev OI, Kiselev VI, Piotrovskii LB, Ershov FI. [The structural and functional analysis of the biological activity of acridine derivatives]. Vestn Ross Acad Med Nauk 2004;29–34.
Lechardeur D, Verkman AS, Lukacs GL. Intracellular routing of plasmid DNA during non-viral gene transfer. Adv Drug Deliv Rev. 2005;57:755–67.
Kloeckner J, Boeckle S, Persson D, Roedl W, Ogris M, Berg K, et al. DNA polyplexes based on degradable oligoethylenimine-derivatives: combination with EGF receptor targeting and endosomal release functions. J Control Release. 2006;116:115–22.
Ou M, Wang XL, Xu R, Chang CW, Bull DA, Kim SW. Novel biodegradable poly(disulfide amine)s for gene delivery with high efficiency and low cytotoxicity. Bioconjug Chem. 2008;19:626–33.
Bolhassani A, Ghasemi N, Servis C, Taghikhani M, Rafati S. The efficiency of a novel delivery system (PEI600-Tat) in development of potent DNA vaccine using HPV16 E7 as a model antigen. Drug Deliv. 2009;16:196–204.
Moore NM, Clayton CL, Sakiyama-Elbert SE. Characterization of multifunctional PEG-based gene delivery system containing nuclear localization signals and endosome escape peptides. Acta Biomater. 2009;5:854–64.
Nitin N, LaConte L, Rhee W-J, Bao G. TAT peptide is capable of importing large nanoparticles across nuclear membrane in digitonin permeabilized cells. Ann Biomed Engin. 2009;37:2018–27.
Sadanandam A, Varney ML, Kinarsky L, Ali H, Mosley RL, Singh RK. Identification of functional cell adhesion molecules with a potential role in metastasis by a combination of in vivo phage display and in silico analysis. OMICS. 2007;11:41–57.
Takae S, Miyata K, Oba M, Ishii T, Nishiyama N, Itaka K, et al. PEG-detachable polyplex micelles based on disulfide-linked block catiomers as bioresponsive nonviral gene vectors. J Am Chem Soc. 2008;130:6001–9.
Kaleand AA, Torchilin VP. Enhanced transfection of tumor cells in vivo using “Smart” pH-sensitive TAT-modified pegylated liposomes. J Drug Target. 2007;15:538–45.
Wan L, Pooyan S, Hu P, Leibowitz MJ, Stein S, Sinko PJ. Peritoneal macrophage uptake, pharmacokinetics and biodistribution of macrophage-targeted PEG-fMLF (N-formyl-methionyl-leucyl-phenylalanine) nanocarriers for improving HIV drug delivery. Pharm Res. 2007;24:2110–9.
Romberg B, Hennink WE, Storm G. Sheddable coatings for long-circulating nanoparticles. Pharm Res. 2008;25:55–71.
Dallas S, Miller DS, Bendayan R. Multidrug resistance-associated proteins: expression and function in the central nervous system. Pharmacol Rev. 2006;58:140–61.
Zhou SF, Wang LL, Di YM, Xue CC, Duan W, Li CG, et al. Substrates and inhibitors of human multidrug resistance associated proteins and the implications in drug development. Curr Med Chem. 2008;15:1981–2039.
Labialle S, Dayan G, Michaud M, Barakat S, Rigal D, Baggetto LG. Gene therapy of the typical multidrug resistance phenotype of cancers: a new hope? Semin Oncol. 2005;32:583–90.
Wu CP, Calcagno AM, Ambudkar SV. Reversal of ABC drug transporter-mediated multidrug resistance in cancer cells: evaluation of current strategies. Curr Mol Pharmacol. 2008;1:93–105.
Galinsky RE, Hoesterey BL, Anderson BD. Brain and cerebrospinal fluid uptake of zidovudine (AZT) in rats after intravenous injection. Life Sci. 1990;47:781–8.
Jorajuria S, Dereuddre-Bosquet N, Becher F, Martin S, Porcheray F, Garrigues A, et al. ATP binding cassette multidrug transporters limit the anti-HIV activity of zidovudine and indinavir in infected human macrophages. Antivir Ther. 2004;9:519–28.
Giri N, Shaik N, Pan G, Terasaki T, Mukai C, Kitagaki S, et al. Investigation of the role of breast cancer resistance protein (Bcrp/Abcg2) on pharmacokinetics and central nervous system penetration of abacavir and zidovudine in the mouse. Drug Metab Dispos. 2008;36:1476–84.
Pan G, Giri N, Elmquist WF. Abcg2/Bcrp1 mediates the polarized transport of antiretroviral nucleosides abacavir and zidovudine. Drug Metab Dispos. 2007;35:1165–73.
Wangand X, Baba M. The role of breast cancer resistance protein (BCRP/ABCG2) in cellular resistance to HIV-1 nucleoside reverse transcriptase inhibitors. Antivir Chem Chemother. 2005;16:213–6.
Wu H, Hait WN, Yang JM. Small interfering RNA-induced suppression of MDR1 (P-glycoprotein) restores sensitivity to multidrug-resistant cancer cells. Cancer Res. 2003;63:1515–9.
Gan HZ, Zhang GZ, Zhao JS, Zhang FC, Bu LS, Yang SJ, et al. Reversal of MDR1 gene-dependent multidrug resistance using short hairpin RNA expression vectors. Chin Med J (Engl). 2005;118:893–902.
Kaszubiak A, Holm PS, Lage H. Overcoming the classical multidrug resistance phenotype by adenoviral delivery of anti-MDR1 short hairpin RNAs and ribozymes. Int J Oncol. 2007;31:419–30.
Su Y, Lee SH, Sinko PJ. Inhibition of efflux transporter ABCG2/BCRP does not restore mitoxantrone sensitivity in irinotecan-selected human leukemia CPT-K5 cells: evidence for multifactorial multidrug resistance. Eur J Pharm Sci. 2006;29:102–10.
This work was supported by NIH grants NS050660 and NS063879 (S.V.V.). Authors are grateful to Mrs. Huai-Yun Han, Arin Zeman, and Galya Warren for excellent technical help in conducting some experiments. The assistance of UNMC Confocal Microscopy and Protein Analysis Core facilities is greatly appreciated.
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Zhang, H., Gerson, T., Varney, M.L. et al. Multifunctional Peptide-PEG Intercalating Conjugates: Programmatic of Gene Delivery to the Blood-Brain Barrier. Pharm Res 27, 2528–2543 (2010). https://doi.org/10.1007/s11095-010-0256-x
- ApoE peptide
- blood-brain barrier
- brain capillary endothelial cells
- brain-homing peptide
- intercalating complex
- NLS peptide
- peptide-PEG conjugate
- plasmid DNA
- TAT peptide