In vivo administration of recombinant growth hormone or gamma interferon activities macrophages: enhanced resistance to experimental Salmonella typhimurium infection is correlated with generation of reactive oxygen intermediates
| Autor: | Libby M. Yunger, Keith W. Kelley, Sean Arkins, Carl K. Edwards, Robert Dantzer, S.M. Ghiasuddin, R. M. Lorence |
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| Přispěvatelé: | Unité mixte de recherche neurobiologie intégrative, Université Bordeaux Segalen - Bordeaux 2-Institut National de la Recherche Agronomique (INRA), ProdInra, Migration |
| Jazyk: | angličtina |
| Rok vydání: | 1992 |
| Předmět: |
medicine.medical_specialty
[SDV]Life Sciences [q-bio] medicine.medical_treatment Immunology Biology Microbiology 03 medical and health sciences chemistry.chemical_compound Interferon-gamma 0302 clinical medicine Phagocytosis In vivo Superoxides Internal medicine medicine Animals Secretion Interferon gamma ComputingMilieux_MISCELLANEOUS 030304 developmental biology Hypophysectomy 0303 health sciences Zymosan Rats Inbred Strains Hydrogen Peroxide Macrophage Activation Growth hormone secretion In vitro Prolactin Immunity Innate Recombinant Proteins Rats [SDV] Life Sciences [q-bio] Infectious Diseases Cytokine Endocrinology chemistry Growth Hormone Salmonella Infections RAT Parasitology Female 030215 immunology medicine.drug Research Article |
| Zdroj: | Scopus-Elsevier Infection and Immunity Infection and Immunity, American Society for Microbiology, 1992, 60 (6), pp.2514-2521 |
| ISSN: | 0019-9567 1098-5522 |
| Popis: | Purified and recombinant forms of growth hormone (GH) as well as of recombinant rat gamma interferon (IFN-gamma) enhance the survival of rats deprived of endogenous pituitary GH secretion by hypophysectomy (HX rats) and infected with virulent Salmonella typhimurium. Macrophages obtained from rats with intact pituitaries (pituitary-intact rats) or HX rats that were treated in vivo with either GH or the closely related hormone prolactin released elevated (P less than 0.05) levels of superoxide anion (O2-) after in vitro opsonized-zymosan stimulation compared with those from placebo-treated animals. These levels of O2- release were similar in magnitude to those of macrophages from rats treated in vivo with IFN-gamma. In time course in vivo macrophage activation studies, both IFN-gamma and GH significantly increased O2- secretion within 24 h, with maximal secretion occurring at day 3. Macrophages obtained from pituitary-intact and HX rats injected in vivo with GH also released elevated (P less than 0.05) levels of hydrogen peroxide (H2O2) and displayed enhanced (P less than 0.01) phagocytic activity toward opsonized Listeria monocytogenes in vitro. The mechanism of action of GH in vivo is likely to be a direct one because resident peritoneal macrophages from rats could be primed in vitro for enhanced secretion of O2- following triggering of these cells with opsonized zymosan. These data show that in vivo administration of two closely related pituitary hormones, GH and prolactin, can effectively prime macrophages, which is consistent with the hypothesis that GH mediates resistance to S. typhimurium by a direct stimulatory action on macrophages. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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