title: Age- and disease-related innate immunity of human leukocytes ex vivo.
abstract: Two mechanisms of innate immunity, i.e. resistance to viral infection and the production of cytokines by leukocytes, were compared in blood isolated from four groups of donors: healthy young (19-35 years old), healthy elderly (over 60), elderly Alzheimer's disease (AD) patients, and elderly patients with alimentary tract cancer (CA). Peripheral blood leukocytes (PBLs) were isolated by gradient centrifugation in Gradisol G. The degree of resistance was calculated from the kinetics of vesicular stomatitis virus (VSV) replication in the PBLs. Cytokine (TNFα, IFNα, IFNγ, IL-12, and IL-10) levels were determined by ELISA. The antiviral resistance of the PBLs varied, but a difference was observed only between the young and elderly groups and not between the healthy elderly controls and those with AD or cancer. Differences observed in all the groups concerned the ability and intensity of cytokine production. The most impressive results were obtained for spontaneous TNF and IFNα release. While TNF was released spontaneously by the PBLs of the elderly CA patients and the young healthy group, it was usually undetected in the AD and only sometimes in the healthy elderly group. Leukocytes isolated from the elderly groups responded to VSV infection with more intense IFNα and IFNγ production than the younger group.
authors: Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland.
authors: Bogna
authors: B
authors: Jatczak
authors: Jerzy
authors: J
authors: Leszek
authors: Iwona
authors: I
authors: Siemieniec
authors: Marta
authors: M
authors: Sochocka
authors: Agnieszka
authors: A
authors: Wiśniewska
authors: Radosław
authors: R
authors: Tarkowski
authors: Marek
authors: M
authors: Bębenek
authors: Zofia
authors: Z
authors: Błach-Olszewska
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000276:immunology*; D016207:Cytokines / Q000096:biosynthesis* / Q000276:immunology; D004067:Digestive System Neoplasms / Q000276:immunology*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007113:Immunity, Innate / Q000276:immunology*; D007963:Leukocytes, Mononuclear / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D018353:Rhabdoviridae Infections / Q000276:immunology*; D055815:Young Adult
chemical_list: D016207:Cytokines