Investigation of immunomodulatory and anti-inflammatory effects of eriodictyol through its cellular anti-oxidant activity

• Published in: Cell stress & chaperones 2016-09, Vol.21 (5), p.773-781
• Main Authors: Mokdad-Bzeouich, Imen, Mustapha, Nadia, Sassi, Aicha, Bedoui, Ahmed, Ghoul, Mohamed, Ghedira, Kamel, Chekir-Ghedira, Leila
• Format: Article
• Language: English
• Subjects: Animals; Anti-Inflammatory Agents - pharmacology; Antiinflammatories; Antioxidants - pharmacology; Biochemistry; Biomedical and Life Sciences; Biomedicine; Cancer Research; Catalase - metabolism; Cell Biology; Cell Proliferation - drug effects; Cells, Cultured; Cytotoxicity; Drug Evaluation, Preclinical; Flavanones - pharmacology; Flavonoids; Immunologic Factors - pharmacology; Immunology; Killer Cells, Natural - drug effects; Killer Cells, Natural - immunology; Macrophages; Macrophages - drug effects; Male; Mice, Inbred BALB C; Natural killer cells; Neurosciences; Nitric Oxide - biosynthesis; Optical density; Original Paper; Oxidative stress; Spleen cells; Splenocytes; T-Lymphocytes, Cytotoxic - drug effects; T-Lymphocytes, Cytotoxic - immunology; Tumors
• ISSN: 1355-8145; 1466-1268
• DOI: 10.1007/s12192-016-0702-8

Many studies have been performed to assess the potential utility of natural products as immunomodulatory agents to enhance host responses against infection or to ameliorate immune-based pathologies. To determine whether eriodictyol has immunomodulatory effects and clarify which types of immune effector cells are stimulated in vitro, we investigated the stimulatory effect of eriodictyol on spleen cells isolated from BALB/c mice. Eriodictyol significantly stimulated splenocyte proliferation. However, only B lymphocytes (not T lymphocytes) could be stimulated by eriodictyol in a dose-related manner. Studies assessing potential effect of eriodictyol on innate immunity reported that eriodictyol enhanced significantly the killing activity of natural killer (NK) cells, T lymphocytes, and macrophages. We also demonstrated that eriodictyol inhibited nitric oxide (NO) production and lysosomal enzyme activity in murine peritoneal macrophages cultured ex-vivo, suggesting a potential anti-inflammatory effect in situ. Eriodictyol revealed also a cellular anti-oxidant activity in splenocytes and macrophages. Furthermore, eriodictyol increased catalase activity in spleen cells. From this data, it can be concluded that eriodictyol exhibited an immunomodulatory effect that could be ascribed in part to a cytoprotective effect related to its anti-oxidant activity.