Chronic psychological stress and its impact on the development of aggressive breast cancer

Einstein (Sao Paulo). 2015 Jul-Sep;13(3):352-6. doi: 10.1590/S1679-45082015AO3344.
[Article in English, Portuguese]

Abstract

Objective: To investigate the clinicopathological findings of women diagnosed with breast cancer and study the impact of chronic psychological stress on the pathological characteristics of these tumors.

Methods: We investigated a cohort composed of women diagnosed with breast cancer and divided into two groups. One group was categorized as presenting with chronic psychological stress (by using the Self-Reporting Questionnaire - SRQ-20). Another group of women with breast cancer, but with no previous history of chronic psychological stress, comprised the Control Group. Clinical and pathological data were assessed.

Results: Women presenting with a history of chronic distress were significantly overweight when compared to the Control Group. Furthermore, it was observed that these stressed women also had a significant percentage of aggressive breast cancer subtype, the HER2 amplified tumor, which could be putatively associated with the loss of immunosurveillance.

Conclusion: Our findings suggested an interaction among chronic psychological stress, overweight, and the development of more aggressive breast tumors.

Objetivo: Investigar os achados clínico-patológicos de mulheres diagnosticadas com câncer de mama e estudar o impacto do estresse psicológico crônico nas características patológicas desses tumores.

Métodos: Investigamos uma coorte composta por mulheres diagnosticadas com câncer de mama divididas em dois grupos. O primeiro foi classificado pela apresentação de estresse psicológico crônico (por meio do Self-Reporting Questionnaire − SRQ-20). Outro grupo de mulheres com câncer de mama, mas sem história prévia de estresse psicológico crônico, foi denominado Grupo Controle. Os dados clínicos e patológicos foram avaliados.

Resultados: As mulheres com histórico de estresse crônico apresentaram-se significativamente acima do peso quando comparadas com o Grupo Controle. Além disso, verificou-se que estas mulheres estressadas apresentaram um porcentual significativo de um subtipo de câncer de mama agressivo, o HER2, o que poderia estar associado à possível perda da imunovigilância.

Conclusão: Nossos resultados sugeriram uma ligação entre o estresse psicológico crônico, o excesso de peso e o desenvolvimento de tumores de mama com maior agressividade.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Body Mass Index
  • Breast Neoplasms / complications
  • Breast Neoplasms / pathology*
  • Breast Neoplasms / psychology
  • Carcinoma, Ductal, Breast / complications
  • Carcinoma, Ductal, Breast / pathology*
  • Carcinoma, Ductal, Breast / psychology
  • Chronic Disease
  • Cohort Studies
  • Female
  • Humans
  • Middle Aged
  • Monitoring, Immunologic
  • Overweight / complications
  • Receptor, ErbB-2 / metabolism*
  • Stress, Psychological / complications*
  • Surveys and Questionnaires

Substances

  • Receptor, ErbB-2