Abstract
The possibility that drugs attached to nanowires enhance their therapeutic efficacy was examined in a rat model of spinal cord injury (SCI). Three Acure compounds AP-173, AP-713 and AP-364 were tagged with TiO2-based nanowires (50–60 nm) and applied over the traumatized cord either 5 or 60 min after SCI in rats produced by a longitudinal incision into the right dorsal horn of the T10-11 segments under equithesin anaesthesia. Normal compounds were used for comparison. After 5 h SCI, behavioral outcome, blood–spinal cord barrier (BSCB) permeability, edema formation and cell injury were examined. Topical application of nanowired compound AP-713 (10 µg in 20 µL) when applied either 5 or 60 min after injury markedly attenuated behavioral dysfunction at 2–3 h after SCI and reduces BSCB disruption, edema formation and cord pathology at 5 h compared to other compounds. Whereas normal compounds applied at 5 min after injury (but not after 60 min) had some significant but less beneficial effects compared to their nanowired combinations. On the other hand, nanowires alone did not influence spinal cord pathology or motor function after SCI. Taken together, our results indicate that the nanowired-drug-delivery enhances the neuroprotective efficacy of drugs in SCI and reduces functional outcome compared to normal compounds even applied at a later stage following trauma, not reported earlier.
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References
Assie MB, Bardin L, Auclair A, Consul-Denjean N, Sautel F, Depoortere R, Newman-Tancredi A (2007) F15063, a potential antipsychotic with dopamine D(2)/D(3) antagonist, 5-HT (1A) agonist and D(4) partial agonist properties: (IV) duration of brain D2-like receptor occupancy and antipsychotic-like activity versus plasma concentration in mice. Naunyn Schmiedebergs Arch Pharmacol Jun 375(4):241–250. Epub 2007 Apr 24
Betbeder D, Sperandio S, Latapie JP, de Nadai J, Etienne A, Zajac JM, Frances B (2000) Biovector nanoparticles improve antinociceptive efficacy of nasal morphine. Pharm Res Jun 17(6):743–748
Chi B, Victorio ES, Jin T (2007) Synthesis of TiO2-based nanotube on Ti substrate by hydrothermal treatment. J Nanosci Nanotechnol Feb; 7(2):668–672
Dong W, Zhang T, McDonald M, Padilla C, Epstein J, Tian ZR (2006) Biocompatible nanofiber scaffolds on metal for controlled release and cell colonization. Nanomedicine Dec; 2(4):248–52
Elliott KAC, Jasper H (1949) Measurement of experimentally induced brain swelling and shrinkage. Am J Physiol 157:122–129
Friese A, Seiller E, Quack G, Lorenz B, Kreuter J (2000) Increase of the duration of the anticonvulsive activity of a novel NMDA receptor antagonist using poly(butylcyanoacrylate) nanoparticles as a parenteral controlled release system. Eur J Pharm Biopharm Mar; 49(2):103–109
Kreuter J (1995) Nanoparticulate systems in drug delivery and targeting. J Drug Target 3(3):171–173
Olivier JC (2005) Drug transport to brain with targeted nanoparticles. NeuroRx Jan; 2(1):108–119
Sharma HS (2007) Nanoneuroscience: emerging concepts on nanoneurotoxicity and nanoneuroprotection. Nanomedicine Dec; 2(6):753–758. Review
Sharma HS (2005) Neuroprotective effects of neurotrophins and melanocortins in spinal cord injury: an experimental study in the rat using pharmacological and morphological approaches. Ann N Y Acad Sci Aug; 1053:407–1021
Sharma HS (2005) Pathophysiology of blood–spinal cord barrier in traumatic injury and repair. Curr Pharm Des 11(11):1353–1389. Review
Sharma HS (2004) Pathophysiology of the blood–spinal cord barrier in traumatic injury. In: Sharma HS, Westman J (eds) The blood–spinal cord and brain barriers in health and disease. Elsevier Academic, San Diego, pp 437–518
Sharma HS (2008) New perspectives for the treatment options in spinal cord injury. Expert Opin Pharmacother (16):2773–2800. Review.
Sharma HS, Olsson Y (1990) Edema formation and cellular alterations following spinal cord injury in the rat and their modification with p-chlorophenylalanine. Acta Neuropathol (Berl) 79(6):604–610
Sharma HS, Sharma A (2007) Nanoparticles aggravate heat stress induced cognitive deficits, blood–brain barrier disruption, edema formation and brain pathology. Prog Brain Res 162:245–276
Sharma HS, Skottner A, Lundstedt T, Flardh M, Wiklund L (2006) Neuroprotective effects of melanocortins in experimental spinal cord injury. An experimental study in the rat using topical application of compounds with varying affinity to melanocortin receptors. J Neural Transm Apr; 113(4):463–476
Sharma HS, Olsson Y, Pearsson S, Nyberg F (1995) Trauma induced opening of the blood–spinal cord barrier is reduced by indomethacin, an inhibitor of prostaglandin synthesis. Experimental observations in the rat using 131I-sodium, Evans blue and lanthanum as tracers. Restor Neurol Neurosci 7:207–215
Sharma HS, Olsson Y, Cervós-Navarro J (1993) Early perifocal cell changes and edema in traumatic injury of the spinal cord are reduced by indomethacin, an inhibitor of prostaglandin synthesis. Experimental study in the rat. Acta Neuropathol 85(2):145–153
Sharma HS, Winkler T, Stalberg E, Olsson Y, Dey PK (1991) Evaluation of traumatic spinal cord edema using evoked potentials recorded from the spinal epidural space. An experimental study in the rat. J Neurol Sci Apr; 102(2):150–162
Sharma HS, Ali SF, Dong W, Tian ZR, Patnaik R, Patnaik S, Sharma A, Boman A, Lek P, Seifert E, Lundstedt T (2007) Drug delivery to the spinal cord tagged with nanowire enhances neuroprotective efficacy and functional recovery following trauma to the rat spinal cord. Ann N Y Acad Sci Dec; 1122:197–218
Silva GA, Czeisler C, Niece KL, Beniash E, Harrington DA, Kessler JA, Stupp SI (2004) Selective differentiation of neural progenitor cells by high-epitope density nanofibers. Science Feb; 27;303(5662):1352–1355
Vyas TK, Tiwari SB, Amiji MM (2006) Formulation and physiological factors influencing CNS delivery upon intranasal administration. Crit Rev Ther Drug Carrier Syst 23(4):319–347
Wilson B, Samanta MK, Santhi K, Kumar KP, Paramakrishnan N, Suresh B (2008) Poly(n-butylcyanoacrylate) nanoparticles coated with polysorbate 80 for the targeted delivery of rivastigmine into the brain to treat Alzheimer’s disease. Brain Res Mar 20; 1200:159–168. Epub 2008 Jan 26
Yao C, Doose DR, Novak G, Bialer M (2006) Pharmacokinetics of the new antiepileptic and CNS drug RWJ-333369 following single and multiple dosing to humans. Epilepsia Nov 47(11):1822–1829
Zhao D, Fei Z, Ang WH, Dyson PJ (2006) A strategy for the synthesis of transition-metal nanoparticles and their transfer between liquid phases. Small Jul; 2(7):879–883
Acknowledgements
This investigation is partially supported by the Air Force Office of Scientific Research (London), Air Force Material Command, USAF, under grant number FA8655-05-1-3065. The U.S. Government is authorized to reproduce and distribute reprints for Government purpose notwithstanding any copyright notation thereon. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the Air Force Office of Scientific Research or the U.S. Government. We express sincere gratitude to several laboratories where a part of the work is done or some data is recorded and evaluated. Financial support from Acure Pharma (Sweden); Astra-Zeneca, Mölndal, Sweden, Alexander von Humboldt Foundation (Germany); The University Grants Commission, New Delhi, India, Department of Science and Technology, Govt. of India, New Delhi is gratefully acknowledged. The authors have no conflict of interest with any financial agencies mentioned above. Technical assistance of Inga Hörte, Kerstin Flink, Madeleine Jarild, Mari-Anne Carlsson, Margaretta Butler of Uppsala University are highly appreciated.
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Sharma, H.S. et al. (2010). Nanowired-Drug Delivery Enhances Neuroprotective Efficacy of Compounds and Reduces Spinal Cord Edema Formation and Improves Functional Outcome Following Spinal Cord Injury in the Rat. In: Czernicki, Z., Baethmann, A., Ito, U., Katayama, Y., Kuroiwa, T., Mendelow, D. (eds) Brain Edema XIV. Acta Neurochirurgica Supplementum, vol 106. Springer, Vienna. https://doi.org/10.1007/978-3-211-98811-4_63
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