Abstract
Evidence suggests that testicular cancer (TC) and its treatment are associated with cognitive impairment. However, the underlying neural substrate and biological mechanisms are poorly understood. This study aimed to investigate changes in cognition and brain grey matter (GM) morphology in TC patients undergoing treatment, and to explore associations with immune markers, endocrine markers, and genotype. Sixty-five patients with stage I-III TC underwent assessment after surgery but prior to further treatment and again 6 months after. Twenty-two patients received chemotherapy (+CT), while 43 did not (−CT). Assessments included neuropsychological testing, whole-brain magnetic resonance imaging, and blood samples. Twenty-five healthy controls (HCs) underwent neuropsychological testing with a matching time interval. A regression-based approach was used to determine cognitive changes and longitudinal voxel-based morphometry (VBM) was performed to investigate changes in GM density in the TC groups. Compared with the HCs, both TC groups showed higher rates of cognitive decline (p < 0.05). A trend towards greater decline was observed in + CT (63.6 %) compared with -CT patients (39.5 %) (p = 0.07). VBM revealed widespread GM reductions in both TC groups, but a group-by-time interaction analysis revealed prefrontal reductions specific to the + CT group (p = 0.02), which were associated with poorer cognitive performance. Poorer cognitive performance was also associated with an increase in tumor necrosis factor alpha in + CT patients. Furthermore, an interaction effect was found between the APOE ε4 genotype and chemotherapy on cognitive performance with ε4 carriers performing significantly worse. These findings provide novel evidence of changes in cognition and brain morphology in TC patients undergoing treatment.
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The study was funded by grants from the Danish Cancer Society (R17-A698) and by Saværksejer Jeppe Juhls og Hustru Ovita Juhls Mindelegat. Lisa M. Wu’s was supported by the National Cancer Institute of the National Institutes of Health under Award Number #7K07CA184145-02. Anders D. Børglum and Ditte Demontis were financially supported by The Lundbeck Foundation.
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Informed consent was obtained from all individual participants included in the study and performed procedures were in accordance with the ethical standards of The National Committee on Health Research Ethics and with the 1964 Helsinki declaration and its later amendments.
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Amidi, A., Agerbæk, M., Wu, L.M. et al. Changes in cognitive functions and cerebral grey matter and their associations with inflammatory markers, endocrine markers, and APOE genotypes in testicular cancer patients undergoing treatment. Brain Imaging and Behavior 11, 769–783 (2017). https://doi.org/10.1007/s11682-016-9552-3
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DOI: https://doi.org/10.1007/s11682-016-9552-3