title: Effects of selenium on proliferation, interleukin-2 production and selenoprotein mRNA expression of normal and dexamethasone-treated porcine splenocytes.
abstract: Porcine splenocytes were isolated in vitro, treated with different levels of dexamethasone (DEX), and stimulated by concanavalin A. Further, the normal (non-DEX-supplemented) or DEX-treated (0.01 µmol/L) splenocytes were incubated with 0, 0.5, 2, and 5 µmol/L Na2SeO3. The splenocyte proliferation, IL-2 production, intracellular glutathione peroxidase 1 (GPx1) mRNA level and activity and thioredoxin reductase 1 mRNA level were measured. The results showed that addition of 0.5 or 2 µmol/L Na2SeO3 significantly promoted normal and DEX-treated splenocyte proliferation, IL-2 production and GPx1 mRNA expression and activity (P < 0.05), respectively. The maximum effect was observed in DEX-treated splenocytes with 0.5 µmol/L Na2SeO3. Thus, our results show that the immune state modulation of Se is stronger in DEX-treated splenocytes than normal splenocytes. The mechanism underlying this effect may be increased in GPx1 expression induced by Se. Our results explain the controversy of varying reports on the immune state modulation induced by Se.
authors.affiliation: College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China.
authors.forename: Tenghan
authors.initials: T
authors.lastname: Zhuang
authors.affiliation: College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China.
authors.forename: Haibin
authors.initials: H
authors.lastname: Xu
authors.affiliation: College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China.
authors.forename: Shu
authors.initials: S
authors.lastname: Hao
authors.affiliation: College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Ren
authors.affiliation: College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China.
authors.forename: Xingxiang
authors.initials: X
authors.lastname: Chen
authors.affiliation: College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China.
authors.forename: Cuiling
authors.initials: C
authors.lastname: Pan
authors.affiliation: College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China. Electronic address: khhuang@njau.edu.cn.
authors.forename: Kehe
authors.initials: K
authors.lastname: Huang
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology*; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D003907:Dexamethasone / Q000494:pharmacology*; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements / Q000032:analysis; D056747:Immunomodulation / Q000187:drug effects*; D007376:Interleukin-2 / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D012643:Selenium / Q000276:immunology* / Q000494:pharmacology*; D051140:Selenoproteins / Q000235:genetics / Q000378:metabolism; D013154:Spleen / Q000187:drug effects*; D013552:Swine / Q000276:immunology* / Q000378:metabolism
chemical_list: D000893:Anti-Inflammatory Agents; D007376:Interleukin-2; D012333:RNA, Messenger; D051140:Selenoproteins; D003907:Dexamethasone; D012643:Selenium
keywords: Immunosuppression; Proliferation; Selenium; Selenoprotein; Splenocyte