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Ganglion cell complex thickness changes in patients with different states of bipolar disorder

Abstract

Objectives

Neuroimaging studies in patients with bipolar disorder have suggested that a neuropathological process may be effective in this disease. Neurodegenerative changes in the retina can be followed by optical coherence tomography, a non-invasive imaging method that allows in vivo visualization of the retinal layers. The aim of this study was to investigate the possible differences in optical coherence tomography parameters during euthymic, manic, and depressive episodes in patients diagnosed with bipolar disorder.

Methods

A total of 150 patients with bipolar disorder were included in the study, divided into three groups (50 patients in a euthymic state, 50 patients in a manic state, and 50 patients in a depressive state) and compared with 50 healthy controls. Ganglion cell complex thickness was measured with automated macular segmentation software of spectral-domain optical coherence tomography.

Results

Ganglion cell complex thicknesses were thicker in all quadrants in patient groups than the control group but the differences were significant in perifoveal superior and perifoveal inferior quadrants (p < 0.001, p < 0.001). There were no differences in ganglion cell complex thickness among the patient groups (p > 0.05).

Conclusion

The evaluation of ganglion cell complex thickness by spectral-domain optical coherence tomography may give a clue for monitoring neurodegenerative changes in patients with bipolar disorder.

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Fig. 1: Macular inner retinal layers segmented by SD-OCT.
Fig. 2: The thickness map of inner retinal layers detected by the software of SD-OCT.

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Affiliations

Authors

Contributions

YC and EM designed the study and the computational framework and analysed the data. AMC, II, IEC, MO, and IE contributed to the interpretation of the results and revising work critically. YC wrote the manuscript with input from all authors. YC and EM conceived the study and were in charge of overall direction and planning.

Corresponding author

Correspondence to Yusuf Cokunlu.

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The authors declare no competing interest.

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Cokunlu, Y., Mirza, E., Caliskan, A.M. et al. Ganglion cell complex thickness changes in patients with different states of bipolar disorder. Eye (2021). https://doi.org/10.1038/s41433-021-01580-4

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