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Published in: BMC Cancer 1/2012

Open Access 01-12-2012 | Research article

Effects of androgen deprivation on brain function in prostate cancer patients – a prospective observational cohort analysis

Authors: Herta H Chao, Edward Uchio, Sheng Zhang, Sien Hu, Sarah R Bednarski, Xi Luo, Michal Rose, John Concato, Chiang-shan R Li

Published in: BMC Cancer | Issue 1/2012

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Abstract

Background

Despite a lack of consensus regarding effectiveness, androgen deprivation therapy (ADT) is a common treatment for non-metastatic, low-risk prostate cancer. To examine a particular clinical concern regarding the possible impact of ADT on cognition, the current study combined neuropsychological testing with functional magnetic resonance imaging (fMRI) to assess both brain activation during cognitive performance as well as the integrity of brain connectivity.

Methods

In a prospective observational cohort analysis of men with non-metastatic prostate cancer at a Veterans Affairs medical center, patients receiving ADT were compared with patients not receiving ADT at baseline and at 6 months. Assessments included fMRI, the N-back task (for working memory), the stop-signal task (for cognitive control), and a quality of life questionnaire.

Results

Among 36 patients enrolled (18 in each group), 30 completed study evaluations (15 in each group); 5 withdrew participation and 1 died. Results for the N-back task, stop-signal task, and quality of life were similar at 6 months vs. baseline in each group. In contrast, statistically significant associations were found between ADT use (vs. non use) and decreased medial prefrontal cortical activation during cognitive control, as well as decreased connectivity between the medial prefrontal cortex and other regions involved with cognitive control.

Conclusions

Although ADT for 6 months did not affect selected tests of cognitive function, brain activations during cognitive control and functional brain connectivity were impaired on fMRI. The long-term clinical implications of these changes are not known and warrant future study.
Appendix
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Metadata
Title
Effects of androgen deprivation on brain function in prostate cancer patients – a prospective observational cohort analysis
Authors
Herta H Chao
Edward Uchio
Sheng Zhang
Sien Hu
Sarah R Bednarski
Xi Luo
Michal Rose
John Concato
Chiang-shan R Li
Publication date
01-12-2012
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2012
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/1471-2407-12-371

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