Stress responses to bacterial and viral mimetics in polycystic ovary syndrome model rats

• Published in: Brain, behavior, & immunity. Health Vol. 38; p. 100772
• Main Authors: Kamada, Shuhei, Noguchi, Hiroki, Yamamoto, Shota, Tamura, Kou, Aoki, Hidenori, Takeda, Asuka, Uchishiba, Maimi, Minato, Saki, Arata, Moeka, Arakaki, Ryosuke, Inui, Hiroaki, Kagawa, Tomohiro, Kawakita, Takako, Yoshida, Atsuko, Mineda, Ayuka, Yamamoto, Yuri, Kinouchi, Riyo, Yoshida, Kanako, Kaji, Takashi, Nishimura, Masato, Iwasa, Takeshi
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.07.2024; Elsevier
• Subjects: Anorectic response; Cytokines; Febrile response; Full Length; Locomotor activity; LPS; PCOS; Poly-IC; Anorectic response; PCOS; Cytokines; Febrile response; Poly-IC; LPS; Locomotor activity
• ISSN: 2666-3546; 2666-3546
• DOI: 10.1016/j.bbih.2024.100772

Polycystic ovary syndrome (PCOS) is associated with an increased risk of psychological distress as well as enhanced responses to psychosocial stress. Recently, it was hypothesized that PCOS patients may be at high risk of novel COVID-19 infections and worse clinical presentations during such infections. Here, we evaluated the effects of PCOS on stress responses to bacterial and viral mimetics using dihydrotestosterone-induced PCOS model rats. Lipopolysaccharide (LPS; a bacterial mimetic) or polyinosinic-polycytidylic acid (Poly-IC; a viral mimetic) was injected into PCOS model rats (PCOS) and non-PCOS rats (control), and the rats' stress responses were evaluated. In the PCOS group, the rats’ anorectic and febrile responses to LPS injection were enhanced, whereas their anorectic and febrile responses to Poly-IC injection were unaltered. The PCOS group also exhibited greater changes in peripheral cytokine levels in response to LPS, but not Poly-IC. On the contrary, after the injection of Poly-IC depressed locomotor activity was more evident in the PCOS group, whereas no such changes were observed after LPS injection. These findings indicate that although the stress responses of PCOS model rats to infection may be enhanced, the patterns of change in stress responses and their underlying mechanisms may differ between bacterial and viral infections. •Responses to psychosocial stress are increased in PCOS.•Responses to bacterial and viral mimetics were evaluated in PCOS model rats.•Responses to LPS and Poly-IC were increased in PCOS model rats.•The patterns of these stress responses to LPS and Poly-IC were different.