Morpho-functional parameters of neurons in the sensorimotor cortex and neuroapoptosis under conditions of an induced experimental allergic encephalomyelitis in rats and a course of intranasal gel administration containing n-phenylacetyl-l-prolylglycine (N
Keywordsn-phenylacetyl-l-prolylglycine, neuroapoptosis, intranasal gel
Purpose. The aim of the research is to evaluate a neuroprotective effect of the nasal dosage form containing Noopept (n-phenylacetyl-l-prolylglycine ethyl ester) by the degree of influence on morphofunctional parameters of neurons in the sensorimotor cortex of animals with experimental allergic encephalomyelitis.
Methods. The experiments were conducted on 260 outbred albino rats weighing 190-220 g which were obtained from the nursery of the State Institution «Institute ofPharmacology and Toxicology of the Academy of Medical Sciences of Ukraine». The quarantine (acclimatization period) for all animals lasted 14 days. An animal model of experimental allergic encephalomyelitis (EAE) which has clinical manifestations and pathogenic mechanisms similar to multiple sclerosis was used for the study. There were five groups of animals in the experiment: 1) the intact group (10 rats); 2) the control group – non-treated subjects with EAE which received saline solution (20 rats); 3) the animals with EAE which received basic treatment – 3,4 mg / kg of Methylprednisolone (MP) intraperitoneally, administered slowly in saline solution with a volume of not more than 1/10 of the blood volume of a rat (20 rats); 4) the animals with EAE which received MP and a nasal gel containing n-phenylacetyl-l-prolylglycine at a dose of 10 mg / kg (20 rats); 5) the animals with EAE which received MP and Citicolinum (Ceraxon, «Ferrer Internacional S.A.», Spain) series D003U1, 500 mg / kg, intragastrically (20 rats). Morphometric studies were carried out with the help of Axioskop microscope (Ziess,Germany), a magnification of x40. The image of neurons in the area of the CA-1 zone of the hippocampus, obtained from the microscope using a highly sensitive video camera COHU-4922 (COCHU Inc.,USA).
Results. It has been shown that the combination therapy with Methylprednisolone and an intranasal gel containing n-phenylacetyl-l-prolylglycine intensified neuroprotectivity in the animals with EAE. In particular, a neuronal density in rats with the experimental pathology, which received a combination of Methylprednisolone and a gel containing n-phenylacetyl-l-prolylglycine, increased by 14,7 (р <0,05) and their area equaled in values with animals from the intact group; at the same time, the amount of RNA increased by 9,2%. In addition, in conditions of this experiment n-phenylacetyl-l-prolylglycine decreased density of apoptotic and destructive cells by 32,4% (р <0,05) in relation to the control and the MP groups, and the amount of apoptotic neurons – by 44,6% (р <0,05). Judging by effect on the neuronal density and the density of apoptotic and destructively altered neurons in the sensorimotor cortex of outbred albino rats with EAE, a combination of Methylprednisolone and a gel containing n-phenylacetyl-l-prolylglycine reliably exceeds the combined therapy of Methylprednisolone and Citicolinum and the MP monotherapy. A higher, according to some indicators, neuroprotective, nootropic, anxiolytic activity of a gel containing n-phenylacetyl-l-prolylglycine is due to its intranasal route of administration.
Conclusions: For the first time, we have obtained reliable data on the neuroprotective effect of the new dosage form containing n-phenylacetyl-l-prolylglycine (Noopept) – an intranasal gel – under conditions of an induced experimental multiple sclerosis. It has been shown that a course of intranasal administration of a gel containing n-phenylacetyl-l-prolylglycine (Noopept) at a dose of 10 mg / kg in combination with Methylprednisolone leads to a decrease in the death of neurons in the sensorimotor cortex of rats with EAE and an increase in the amount of RNA in them. It has been shown that a course of intranasal administration of a gel containing n-phenylacetyl-l-prolylglycine (Noopept) at a dose of 10 mg / kg in combination with Methylprednisolone leads to neuroapoptosis inhibition – a decrease in the density of apoptotic and destructively altered neurons in the sensorimotor cortex of outbred albino rats with EAE. It has been found that judging by effect on the neuronal density and the density of apoptotic and destructively altered neurons in the sensorimotor cortex of the outbred albino rats with EAE, a combination of Methylprednisolone and a gel containing n-phenylacetyl-l-prolylglycine reliably exceeds the combined therapy of Methylprednisolone and Citicolinum and the MP monotherapy.
Dobson R, Giovannoni G. Multiple sclerosis - a review. European journal of neurology. 2019; 26(1): 27–40. DOI: https://doi.org/10.1111/ene.13819.
Ascherio A. Environmental factors in multiple sclerosis. Expert Rev Neurother. 2013;13(12 Suppl): 3-9. DOI: https://doi.org/10.1586/14737175.2013.865866.
Dupuis ML, Pagano MT, Pierdominici M, Ortona E. The role of vitamin D in autoimmune diseases: could sex make the difference? Biology of sex differences. 2021;12(1): 12. DOI: https://doi.org/10.1186/s13293-021-00358-3.
Gholamzad M, Ebtekar M, Ardestani MS, Azimi M, Mahmodi Z, Mousavi MJ.,Aslani SA comprehensive review on the treatment approaches of multiple sclerosis: currently and in the future. Inflammation research : official journal of the European Histamine Research Society. 2019; 68(1): 25–38. DOI: https://doi.org/10.1007/s00011-018-1185-0.
Cross AH, Naismith RT. Established and novel disease-modifying treatments in multiple sclerosis. Journal of internal medicine. 2014; 275(4): 350–363. DOI: https://doi.org/10.1111/joim.12203.
Belenichev IF et all Neuroprotection and neuroplasticity Kiev: Logos, 2015:510. Russian.
Ostrovskaya RU, Gudasheva TA, Voronina TA. Novyj nootropnyj i nejroprotektornyj preparat noopept [The novel nootropic and neuroprotector drug noopept]. Eksperimental'naia i klinicheskaia farmakologiia. 2002; 65(5): 66-72. Russian.
Burlaka BS. Belenichev IF., Nefedov OO., Aliyeva OG., Bukhtiyarova NV. Neuroprotective properties of n-phenylacetyl-l-prolylglycine ethyl ester nasal gel in an experimental model of multiple sclerosis equivalent. Medicni perspektivi. 2020; 4:31-38. DOI: https://doi.org/10.26641/2307-0404.2020.4.221226.
Burlaka BS, Belenichev IF, Gladyshev VV. Doslidzhennia vplyvu poverkhnevo-aktyvnykh rechovyn na vyvilnennia noopeptu z nazalnoi likarskoi formy [Study of the effect of surfactants on the release of noopept from the nasal dosage form]. Current issues in pharmacy and medicine: science and practice. 2020; 13(1(32): 105–108. DOI: https://doi.org/10.14739/2409-2932.2020.1.198183. Ukrainian.
Stefanov AV. Doklinichni doslidzhennia likarskykh zasobiv [Preclinical studies of drugs]. 2002. Kiev: Avicenna: 568. Russian.
Bojko AN, Stoljarov ID, Petrov AM. Perspektivy novyh metodov patogeneticheskogo lechenija rassejannogo skleroza [Prospects for new methods for the pathogenetic treatment of multiple sclerosis]. Nevrol. vestnik im. V. M. Behtereva. 2010; XLII.;1: 157-159. Russian.
Gusev EI., Demina TL., Bojko AN. Rassejannyj skleroz [Multiple sclerosis]. 1997. Moskva: 464. Russain.
Zargarova TA., Favorova OO. Jeksperimental'nyj autoimmunnyj jencefalomielit - model' rassejannogo skleroza [Experimental autoimmune encephalomyelitis - a model of multiple sclerosis]. Immunologija. 1999; 2: 5 – 8. Russian.
Nefedov A. A. Modelirovanie jeksperimental'nogo allergicheskogo jencefalomielita kak naibolee adekvatnoj modeli rassejannogo skleroza [Modeling of experimental allergic encephalomyelitis as the most adequate model of multiple sclerosis]. Materialy Vseros. konf. s mezhdunar. uchastiem, posvjashhennoj 90-letiju so dnja rozhdenija akad. AMN SSSR Artura Viktorovicha Val'dmana «Innovacii v farmakologii: ot teorii k praktike», Sankt-Peterburg, 27-28 oktjabrja 2014 goda: tez. ; pod red. S. B. Seredenina, N.G. Neznanova, Je.Je. Zvartau. Sankt-Peterburg; 2014:129. Russian.
Vahitova Ju.V., Sadovnikov S.V., Borisevich S.S., Ostrovskaja R.U., Gudasheva T.A., Seredenin S.B. Molekuljarnyj mehanizm dejstvija Noopepta - zameshhennogo Pro-Gly-dipeptida [Molecular mechanism of action of Noopept - substituted Pro-Gly-dipeptide]. Acta Naturae. 2016; 1 (28): 90-98. Russian.
How to Cite
The periodical offers access to content in the Open Access system under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0
Number of views and downloads: 287
Number of citations: 0