Abstract
Background
Findings regarding chemotherapy-induced grey matter abnormalities are heterogeneous, and no meta-analysis has quantitatively assessed brain structural alterations in cancer survivors treated with chemotherapy.
Purpose
To investigate the grey matter abnormalities in non-CNS (central nervous system) cancer survivors treated with chemotherapy using Anisotropic Effect Size Signed Differential Mapping (AES-SDM) software.
Method
We identified studies published up to Sep 2018 that compared grey matter in non-CNS cancer survivors treated with chemotherapy (CT+, 10 data sets including 433 individuals) and cancer survivors not treated with chemotherapy (CT-, 7 data sets including 210 individuals) or healthy controls (HC, 3 data sets including 407 individuals) using whole-brain VBM. We used statistical maps from the studies included where available and reported peak coordinates otherwise.
Results
Compared with both CT- and HC, the CT + groups exhibited a reduced grey matter volume (GMV), mainly in the prefrontal and anterior cingulate cortex (ACC) and right fusiform gyrus (FG). A smaller GMV in the FG and prefrontal cortex were found in the CT + compared with the CT-groups and in the CT + groups with impaired cognition. GMV in two areas was positively associated with the time since chemotherapy.
Conclusions
The present results suggest that non-CNS cancer survivors treated with chemotherapy exhibit grey matter abnormalities in the brain, especially in the prefrontal and ACC cortex. Grey matter volume changes after chemotherapy may contribute to cognitive impairments in cancer survivors that can be observed after chemotherapy.
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Acknowledgements
This study was supported by Sichuan Science and Technology Program (grant numbers 2018SZ0183, 2017JY0080), Chengdu Science and Technology Program (grant number 2018-YF05-01134-SN), Populations Project of Health Commission of Sichuan Province (18PJ127) and Newton International Fellowship from the Royal Society, UK.
Funding
This study was funded by Sichuan Science and Technology Program (grant numbers 2018SZ0183, 2017JY0080), Chengdu Science and Technology Program (grant number 2018-YF05-01134-SN), Populations Project of Health Commission of Sichuan Province (18PJ127) and Newton International Fellowship from the Royal Society, UK.
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The study concepts, study design and integrity of the entire study are guaranteed by all authors; NR and DM had the idea for the article. NR, DM, RJ, QH and WX researched the literature, extracted and analyzed the data and prepared the manuscript. XG, LD and ZP supervised the project at all stages and edited and revised the manuscript.
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A meta-analysis of grey matter in chemo-cancer survivors.
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Niu, R., Du, M., Ren, J. et al. Chemotherapy-induced grey matter abnormalities in cancer survivors: a voxel-wise neuroimaging meta-analysis. Brain Imaging and Behavior 15, 2215–2227 (2021). https://doi.org/10.1007/s11682-020-00402-7
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DOI: https://doi.org/10.1007/s11682-020-00402-7