Chronic stress caused by maternal separation is a possible risk factor for the development of 7,12-dimethyl benzo anthracene-induced breast tumors in rats

Copyright © 2021. Published by Elsevier Inc..

BACKGROUND: Chronic stress has been investigated as a risk factor for breast cancer. Maternal separation (MS) of rats has been used as a chronic stress model that alters certain systemic functions, such as the immune response.

OBJECTIVE: The aim of this study was to determine the possible effect of MS on the development of breast tumors induced by 7,12-dimethyl benzo anthracene (DMBA).

METHODOLOGY: postnatal day (PND) 1 female Wistar rats were divided into four experimental groups that either were or were not subjected to MS and either received or did not receive DMBA. For MS, PND 1 to 21 pups were separated from their mothers for 360 min/day. On PND 30, carcinomas were induced in mammary glands using DMBA. Body weight was evaluated, and the injected region was palpated. In addition, the mammary glands were subjected to histological examination, and corticosterone levels were determined in all groups.

RESULTS: DMBA-induced groups had significantly lower body weight gain compared with the non-DMBA-induced groups. Maternal separation increased the incidence of preneoplastic changes and breast carcinogenesis in DMBA-treated animals compared with control animals. Corticosterone levels were increased in both DMBA-induced and MS groups without interaction.

CONCLUSION: MS is a possible risk factor for DMBA-induced preneoplastic changes and breast tumors in rats.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:235

Enthalten in:

Physiology & behavior - 235(2021) vom: 01. Juni, Seite 113399

Sprache:

Englisch

Beteiligte Personen:

Garcia-Laguna, Gabriela [VerfasserIn]
Gerena-Cruz, María Fernanda [VerfasserIn]
Sánchez, Angel Yobany [VerfasserIn]
Monroy-Gomez, Jeison [VerfasserIn]
Dueñas, Zulma [VerfasserIn]

Links:

Volltext

Themen:

57-97-6
9,10-Dimethyl-1,2-benzanthracene
Anthracenes
Breast cancer
Corticosterone
DMBA
Journal Article
Maternal separation
Research Support, Non-U.S. Gov't
Stress

Anmerkungen:

Date Completed 25.06.2021

Date Revised 25.06.2021

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.physbeh.2021.113399

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM323225446