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Tumor Necrosis Factor Alpha-Deficient, but Not Interleukin-6-Deficient, Mice Resist Peripheral Infection with Scrapie

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Názov: Tumor Necrosis Factor Alpha-Deficient, but Not Interleukin-6-Deficient, Mice Resist Peripheral Infection with Scrapie
Autori: Mabbott, Neil, Williams, Alun, Farquhar, Christine, Pasparakis, Manolis, Kollias, Giorgos, Bruce, Moira
Zdroj: Mabbott, N, Williams, A, Farquhar, C, Pasparakis, M, Kollias, G & Bruce, M 2000, ' Tumor necrosis factor alpha-deficient, but not interleukin-6-deficient, mice resist peripheral infection with scrapie ', Journal of Virology, vol. 74, no. 7, pp. 3338-44 .
Informácie o vydavateľovi: American Society for Microbiology, 2000.
Rok vydania: 2000
Predmety: Mice, Knockout, 0301 basic medicine, PrPSc Proteins, Interleukin-6, Tumor Necrosis Factor-alpha, PrPSc Proteins/pathogenicity, PrPSc Proteins/metabolism, 3. Good health, Mice, Inbred C57BL, Mice, 03 medical and health sciences, 0302 clinical medicine, Scrapie/genetics, Tumor Necrosis Factor-alpha/genetics, Animals, Genetic Predisposition to Disease, Interleukin-6/genetics, Scrapie
Popis: In most peripheral infections of rodents and sheep with scrapie, infectivity is found first in lymphoid tissues and later in the central nervous system (CNS). Cells within the germinal centers (GCs) of the spleen and lymph nodes are important sites of extraneural replication, from which infection is likely to spread to the CNS along peripheral nerves. Here, using immunodeficient mice, we investigate the identity of the cells in the spleen that are important for disease propagation. Despite possessing functional T and B lymphocytes, tumor necrosis factor alpha-deficient (TNF-α−/−) mice lack GCs and follicular dendritic cell (FDC) networks in lymphoid tissues. In contrast, lymphoid tissues of interleukin-6-deficient (IL-6−/−) mice possess FDC networks but have impaired GCs. When the CNSs of TNF-α−/−, IL-6−/−, and wild-type mice were directly challenged with the ME7 scrapie strain, 100% of the mice were susceptible, developing disease after closely similar incubation periods. However, when challenged peripherally (intraperitoneally), most TNF-α−/−mice failed to develop scrapie up to 503 days postinjection. All wild-type and IL-6−/−mice succumbed to disease approximately 300 days after the peripheral challenge. High levels of scrapie infection and the disease-specific isomer of the prion protein, PrPSc, were detectable in spleens from challenged wild-type and IL-6−/−mice but not from TNF-α−/−mice. Histopathological analysis of spleen tissue demonstrated heavy PrP accumulations in direct association with FDCs in challenged wild-type and IL-6−/−mice. No PrPScaccumulation was detected in spleens from TNF-α−/−mice. We conclude that, for the ME7 scrapie strain, mature FDCs are critical for replication in lymphoid tissues and that in their absence, neuroinvasion following peripheral challenge is impaired.
Druh dokumentu: Article
Popis súboru: application/pdf
Jazyk: English
ISSN: 1098-5514
0022-538X
DOI: 10.1128/jvi.74.7.3338-3344.2000
Prístupová URL adresa: https://jvi.asm.org/content/74/7/3338.full.pdf
https://pubmed.ncbi.nlm.nih.gov/10708451
https://www.ncbi.nlm.nih.gov/pubmed/10708451
http://www.research.ed.ac.uk/portal/files/11472514/Tumor_necrosis_factor_alpha_deficient_but_not_interleukin_6_deficient_mice_resist_peripheral_infection_with_scrapie.pdf
https://pubmed.ncbi.nlm.nih.gov/10708451/
https://jvi.asm.org/content/74/7/3338.short
https://www.research.ed.ac.uk/portal/files/11472514/Tumor_necrosis_factor_alpha_deficient_but_not_interleukin_6_deficient_mice_resist_peripheral_infection_with_scrapie.pdf
https://europepmc.org/abstract/MED/10708451
https://www.pure.ed.ac.uk/ws/files/11472514/Tumor_necrosis_factor_alpha_deficient_but_not_interleukin_6_deficient_mice_resist_peripheral_infection_with_scrapie.pdf
https://hdl.handle.net/20.500.11820/7cdf1cf5-0e71-45e3-b32a-fca49e4a2216
Rights: ASM Journals Non-Commercial TDM
Prístupové číslo: edsair.doi.dedup.....d4dc9e9f85e3066749dc336099ffb9ed
Databáza: OpenAIRE
Popis
Abstrakt:In most peripheral infections of rodents and sheep with scrapie, infectivity is found first in lymphoid tissues and later in the central nervous system (CNS). Cells within the germinal centers (GCs) of the spleen and lymph nodes are important sites of extraneural replication, from which infection is likely to spread to the CNS along peripheral nerves. Here, using immunodeficient mice, we investigate the identity of the cells in the spleen that are important for disease propagation. Despite possessing functional T and B lymphocytes, tumor necrosis factor alpha-deficient (TNF-α−/−) mice lack GCs and follicular dendritic cell (FDC) networks in lymphoid tissues. In contrast, lymphoid tissues of interleukin-6-deficient (IL-6−/−) mice possess FDC networks but have impaired GCs. When the CNSs of TNF-α−/−, IL-6−/−, and wild-type mice were directly challenged with the ME7 scrapie strain, 100% of the mice were susceptible, developing disease after closely similar incubation periods. However, when challenged peripherally (intraperitoneally), most TNF-α−/−mice failed to develop scrapie up to 503 days postinjection. All wild-type and IL-6−/−mice succumbed to disease approximately 300 days after the peripheral challenge. High levels of scrapie infection and the disease-specific isomer of the prion protein, PrPSc, were detectable in spleens from challenged wild-type and IL-6−/−mice but not from TNF-α−/−mice. Histopathological analysis of spleen tissue demonstrated heavy PrP accumulations in direct association with FDCs in challenged wild-type and IL-6−/−mice. No PrPScaccumulation was detected in spleens from TNF-α−/−mice. We conclude that, for the ME7 scrapie strain, mature FDCs are critical for replication in lymphoid tissues and that in their absence, neuroinvasion following peripheral challenge is impaired.
ISSN:10985514
0022538X
DOI:10.1128/jvi.74.7.3338-3344.2000