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Chemotherapy-induced functional changes of the default mode network in patients with lung cancer

  • Yujie Zhang
  • Yu-Chen Chen
  • Lanyue Hu
  • Jia You
  • Wei Gu
  • Qian Li
  • Huiyou Chen
  • Cunnan Mao
  • Xindao Yin
ORIGINAL RESEARCH
  • 8 Downloads

Abstract

Previous studies have demonstrated that cognitive impairment is associated with neurophysiological changes in lung cancer following chemotherapy. This study aimed to investigate the intrinsic functional connectivity (FC) pattern within the default mode network (DMN) and its associations with cognitive impairment in patients with lung cancer revealed by resting-state functional magnetic resonance imaging (fMRI). Resting-state fMRI scans were acquired from 21 post-chemotherapy and 27 non-chemotherapy lung cancer patients and 30 healthy controls. All groups were age, gender and education-matched. The posterior cingulate cortex (PCC) was chosen as the seed region to detect the FC patterns and then determine whether these changes were related with specific cognitive performance. Compared with non-chemotherapy lung cancer patients, chemotherapy patients revealed decreased FC between the PCC and the right anterior cingulate cortex (ACC), left inferior parietal lobule (IPL), and left medial prefrontal cortex (mPFC), as well as increased FC with the left postcentral gyrus (PoCG). Relative to healthy controls, post-chemotherapy patients exhibited reduced FC between the PCC and the left ACC and left temporal lobe, as well as increased FC with the right PoCG. Moreover, the decreased FC of the PCC to bilateral ACC in post-chemotherapy patients was positively associated with reduced MoCA scores (left: r = 0.529, p = 0.029; right: r = 0.577, p = 0.015). The current study mainly demonstrated reduced resting-state FC pattern within the DMN regions that was linked with impaired cognitive function in lung cancer patients after chemotherapy. These findings illustrated the potential role of the DMN in lung cancer patients that will provide novel insight into the underlying neuropathological mechanisms in chemotherapy-induced cognitive impairment.

Keywords

Lung cancer Functional connectivity Cognitive impairment Default mode network Resting-state fMRI 

Notes

Funding

This work was supported by a grant from the National Natural Science Foundation of China (No. 81601477), Jiangsu Provincial Special Program of Medical Science (No. BE2017614), Youth Medical Talents of Jiangsu Province (No. QNRC2016062), 14th “Six Talent Peaks” Project of Jiangsu Province (No. YY-079), and Nanjing Outstanding Youth Fund (No. JQX17006).

Compliance with ethical standards

Conflict of interests

The authors declare that there is no potential conflict of interests regarding the publication of this paper.

Ethical approval

The current study was approved by the Research Ethics Committee of the Nanjing Medical University.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Radiology, Nanjing First HospitalNanjing Medical UniversityNanjingChina
  2. 2.Department of Respiratory Medicine, Nanjing First HospitalNanjing Medical UniversityNanjingChina

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