English Українська
  • Main
  • Useful links
  • Information for Contributors
  • About
  • Editorial board

  • Article
    S. S. Tkachenko, O. H. Rodynskyi, I. V. Horb-Havrylchenko

    THE EFFECT OF ESTROGEN DEFICIENCY ON THE FUNCTIONING OF ARC CENTRAL LINK SEGMENTAL REFLEX


    About the author: S. S. Tkachenko, O. H. Rodynskyi, I. V. Horb-Havrylchenko
    Heading EXPERIMENTAL MEDICINE
    Type of article Scentific article
    Annotation The purpose of this study was to analyze the influence of the spinal cord interneuronal pool due to the lack of estrogens on the functioning of the central link of the reflex arc. The study was performed on 51 mature rats (females). Estrogen deficiency was induced by ovariohysterectomy. L5 dorsal root was stimulated by single and paired square-wave impulses. The response was recorded on the dorsal surface of the spinal cord and the ventral root at the same level. The overall effect of estrogen deficiency is an increase in the excitability of spinal cord motor neurons, activity of the interneuronal pool, inhibition of nerve transmission at low frequencies due to inhibitory influense of the gelatin substance neurons. First time in vivo results of a study of the modulating effect of the interneuron pool on the motoneuron apparatus of the spinal cord in acute hypoestrogenemia will help to understand the pathophysiological mechanisms of impaired sensitivity, motor activity and seizures that are part of menopausal syndrome, especially in ovarian disease.
    Tags menopause, estrogen, spinal cord, interneuron, motoneuron
    Bibliography
    • Rodynskyy OH, Tkachenko SS, Marazha IO. Monosynaptychni vidpovidi ventralnykh korintsiv spynnoho mozku v umovakh eksperymentalnoyi hipoandrohenemiyi. Achievements of Clinical and Experimental Medicine. 2020;(4):149–155. doi: 10.11603/1811-2471.2020.v.i2.11334. [in Ukrainian]
    • Khodyrev GN, Tsirkin VI. Vliyaniye estrogenov i progesterona na funktsionalnoye sostoyaniye neyronov golovnogo mozga. Vestnik Nizhnegorodskogo universiteta im. N.i. Lobachevskogo. 2012;3(2):295–299.  [in Russian]
    • Casey E, Reese M, Okafor E, Chun D, Gagnon C, Nigl F et al. Influence of menstrual cycle and oral contraceptive phase on spinal excitability. J. Physical Medicine and Rehabilitation. 2016;8(9):860–868. doi: 10.1016/j.pmrj.2016.01.013
    • Chen Q, Zhang W, Sadana N, Chen X. Estrogen receptors in pain modulation: cellular signaling. Biol Sex Differ. 2021;12:22. Published online 2021 Feb 10. doi: 10.1186/s13293-021-00364-5.
    • Hille B. Ionic channels of excitable membranes. Biophysical Journal. 2001;22(1):283–292.
    • Khariv V, Acioglu C, Ni L, Ratnayake A, Li L, Tao Y-X et al. A link between plasma membrane calcium ATPase 2 (PMCA2), estrogen and estrogen receptor α signaling in mechanical pain. Sci Rep. 2018;8(1):17260. doi: 10.1038/s41598-018-35263-0.
    • Kuner R. Spinal excitatory mechanisms of pathological pain. PAIN. 2015; 156:11–17. doi: 10.1097/j.pain.0000000000000118.
    • Ma B, Yu LH, Fan J, Cong B, He P, Ni X. Estrogen modulation of peripheral pain signal transduction: involvement of P2X3 receptors. Purinergic Signal. 2011;7:73–83. doi: 10.1007/s11302-010-9212-9.
    • Sonu Y, Avinash SS, Sreekantha, Arun KK, Malathi M, Shivashankara AR.  Effect of estrogen on altering the serum and urinary levels of calcium, phosphate and magnesium in hysterectomised women compared to natural menopausal south indian women: a case control study. Indian journal clinicalbiochemistry. 2016;31(3):326–331. doi: 10.1007/s12291-015-0532-y.
    • Shugurov OO. The evoked potentials of spinal cord under influence of mechanical stimuli. Regulatory Mechanisms in Biosystems. 2011; 2(1): 125–129. doi: 10.15421/021120.
    • Zhang Y, Xiao X, Zhang XM, Zhao ZO, Zhang YO. Estrogen facilitates spinal cord synaptic transmission via membrane-bound estrogen receptors. Journal of Biological Chemistry. 2012;287(40):33268–33281.  doi:10.1074/jbc.M112.368142
    • Zhong Y.Q. K.C. Li, X. Zhang. Potentiation of excitatory transmission in substantia gelatinosa neurons of rat spinal cord by inhibition of estrogen receptor alpha. Molecular Pain. 2010;6.92. doi: 10.1186/1744-8069-6-92
    Publication of the article «World of Medicine and Biology» №4(78), 2021 year, 242-246 pages, index UDK 612.83:612.662.9:618.173-073.7/-076-085:615.2.1-092.9
    DOI 10.26724/2079-8334-2021-4-78-242-246