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Supportive Care in Cancer

, Volume 27, Issue 2, pp 513–519 | Cite as

Examining the effect of 5-HTTLPR on depressive symptoms in postmenopausal women 1 year after initial breast cancer treatment

  • Justine S. Wang
  • Yvette P. Conley
  • Susan M. Sereika
  • Catherine M. Bender
  • Poorwa Godbole
  • Susan W. WesmillerEmail author
Original Article

Abstract

Background

Depression following the diagnosis of breast cancer has been well documented, and occurs in as many as 40% of women. The serotonin transporter gene SLC6A4 and its functional polymorphism 5-HTTLPR have been extensively studied as factors in the development of depression. Many research studies have demonstrated conflicting results, and the contribution of 5-HTTLPR to depression is unclear.

Purpose

The purpose of this study was to compare the relationship between depressive symptoms and serotonin transporter gene polymorphisms between women with early-stage breast cancer 1 year following initial diagnosis and surgery and matched controls.

Methods

Participants (N = 125), included postmenopausal women following breast cancer surgery (n = 80) and age-and education-matched healthy controls (n = 45). The genetic elements of interest were the long (LA) and short (S) alleles of 5-HTTLPR, as well as the single nucleotide polymorphism rs25531 A > G within the L-allele (LG). DNA was extracted from either blood or saliva and analyzed for the SLC6A4 polymorphisms. The outcome measures for this longitudinal study included Beck Depression Inventory scores and physical function domain scores from the Medical Outcome Study Short Form 36. Results: Women with breast cancer demonstrated greater depressive symptomatology and decreased physical function compared to healthy controls. The LA/LA genotype was associated with increased depressive symptomatology in the overall sample and within the controls. The LA/LA genotype appeared with greater frequency in the experimental group, but the relationship with increased depressive symptoms was not observed. Physical function was a significant (p < 0.00) predictor of depressive symptoms in both groups at 12 months.

Conclusion

The relationship between 5-HTTLPR and depressive symptomatology in breast cancer patients remains unclear. A potential clinical application includes monitoring physical function and addressing increased depressive symptoms as physical function declines.

Keywords

Breast cancer 5-HTTLPR Depressive symptoms Physical function 

Notes

Funding information

This study was supported by the National Cancer Institute, the National Institute of Nursing Research and the Oncology Nursing Foundation. All primary data are housed at the University of Pittsburgh School of Nursing, and are available on request.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of NursingUniversity of PittsburghPittsburghUSA

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