Neurochemical Research

, Volume 36, Issue 2, pp 258–267 | Cite as

Modulation of Sphingosine 1-Phosphate and Tyrosine Hydroxylase in the Stress-Induced Anxiety

  • Soyong Jang
  • Donghyun Kim
  • Yeonju Lee
  • Sohyeon Moon
  • Seikwan Oh


Stress causes endocrinological changes and leads to induce anxiety. It was determined the anxiety and stress-related endocrinological changes through the observation of the level of glucocorticoid and sphingolipid metabolites in serum after stress. Immobilized stress and electric shock was applied to rats for 7 days. This study investigated the induction of anxiety, changes of TH and pERK expression in cortex and amygdala after stress. Also it was determined the changes of glucocorticoid and anxiety when the rats were given stress after amygdala lesion. The stress-given rats spent a lesser percentage of time significantly in the open arm than the control rats. The elevated level of glucocorticoid after stress was suppressed in amygdala lesion group. The expression of TH in the amygdala was decreased, but the expression of TH was not changed in the cortex after stress. To investigate the changes in sphingolipid metabolites after stress, the levels of sphingosine and the phosphate form of sphingolipid (So-1-P) were analyzed in serum. The level of So-1-P was elevated after stress and anxiety was observed after the So-1-P infusion (100 pmol/10 μl/h, i.c.v., for 7 days). Continuous infusion of So-1-P for 7 days led to the significant decrease of TH expression in the amygdala. In conclusion, the results of this study indicate that the lesion of amygdala suppressed the stress-induced anxiety and elevation of glucocorticoid in serum. It was also observed that expression of TH in amygdala as well as increased levels of glucocorticoid in serum might be responsible biomarker, at least in part, of chronic stress. These results suggest that the elevation of So-1-P might be involved in induction of anxiety during stress by the modulation of dopaminergic system in amygdala.


Amygdala Sphingolipid Stress Immobilization TH 



This work was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD, Basic Research Promotion Fund) (KRF-2007-313-E00627).


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Soyong Jang
    • 1
  • Donghyun Kim
    • 1
  • Yeonju Lee
    • 1
  • Sohyeon Moon
    • 1
  • Seikwan Oh
    • 1
  1. 1.Department of Neuroscience and Medical Research Institute, School of MedicineEwha Womans UniversitySeoulKorea

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