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Changes in the Expression of GAT1 (GABA transporter) in the Ventrolateral Part of the Solitary Tract Nucleus in Prenatal Serotonin Deficiency in Rats

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Objectives. To study the expression of GAT1 (GABA transporter) at the early periods of postnatal development in the ventrolateral part of the solitary tract nucleus in prenatal serotonin deficiency in rats. Materials and methods. The endogenous serotonin level in the embryonic period was decreased by inhibition of tryptophan hydroxylase with para-chlorophenylalanine (PCPA) (Sigma, USA). GAT-1 transporter was detected using primary rabbit polyclonal antibodies (anti-GABA transporter 1, GAT1) (AbCam, UK). Results. From the early neonatal period to the beginning of juvenile age, the neuropil and the processes, terminals, and synaptic structures of the lateral and ventral parts of the solitary tract nucleus of control rats showed a gradual increase in GAT1 expression in experimental animals. The level of expression of GAT1 transporter was significantly greater in the lateral and ventral parts during postnatal weeks 1 and 2 than in controls, though by the end of week 3, i.e., by the beginning of juvenile age, it decreased to become significantly lower than in controls. Conclusions. The respiratory areas of the solitary tract nucleus in control rats in the first three weeks of postnatal development showed a gradual increase in GAT1 expression. Serotonin deficiency during the prenatal period led to impaired expression of GAT1 in the early postnatal period. These changes can lead to changes in GABA transmission, which may in turn be the cause of imbalance between inhibitory and excitatory effects in the respiratory center in the early postnatal period and, thus, may be the basis of the development of respiratory dysfunctions at early age.

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Authors and Affiliations

  1. Laboratory for Nervous System Ontogeny, Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg, Russia

    L. I. Khozhai

  2. Department of Histology and Embryology, St. Petersburg State Pediatric Medical University, Ministry of Health of the Russian Federation, St. Petersburg, Russia

    L. I. Khozhai

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  1. L. I. Khozhai
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Correspondence to L. I. Khozhai.

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Translated from Morfologiya, Vol. 156, No. 6, pp. 15–19, November–December, 2019.

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Khozhai, L.I. Changes in the Expression of GAT1 (GABA transporter) in the Ventrolateral Part of the Solitary Tract Nucleus in Prenatal Serotonin Deficiency in Rats. Neurosci Behav Physi 50, 800–803 (2020). https://doi.org/10.1007/s11055-020-00968-1

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  • DOI: https://doi.org/10.1007/s11055-020-00968-1

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