, 41:157 | Cite as

Role of Glutamate in the Mechanisms of Adaptation of the System of Respiratory Control in Rats to Intermittent Hypoxia

  • E. É. Kolesnikova
  • V. I. Nosar
  • I. N. Mankovskaya

In experiments on Wistar rats, we studied the role of changes in the state of glutamatergic transmission in the course of adaptation of the system of respiratory control to intermittent hypoxia. The volume/temporal parameters of respiration were estimated according to characteristics of EMG activity (amplitude, integral intensity of EMG discharges) recorded from the diaphragmatic muscle. Changes in EMG activity of the diaphragm induced by acute hypoxia (breathing a 12% О2-containing gas mixture) were estimated before and after of a 14-day-long course of intermittent hypoxia trainings and before and after inductions of a blocker of NMDA receptors, МK-801. The results prove that the glutamatergic transmitter system is significantly involved in the reaction of the respiratory system to presentation of a hypoxic stimulus within all stages of formation of the ventilatory response, both before and after the action of intermittent hypoxia. Blocking of NMDA receptors under conditions of adaptation to intermittent hypoxia exerted a more intense influence on the amplitude of respiratory EMG discharges of the diaphragm than on their frequency.


intermittent hypoxia EMG activity diaphragm brainstem glutamate MK-801 


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Copyright information

© Springer Science+Business Media, Inc. 2009

Authors and Affiliations

  • E. É. Kolesnikova
    • 1
  • V. I. Nosar
    • 1
  • I. N. Mankovskaya
    • 1
  1. 1.Bogomolets Institute of PhysiologyNational Academy of Sciences of UkraineKyivUkraine

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