TY - JOUR
T1 - Pathological and virological findings of type I interferon receptor knockout mice upon experimental infection with Heartland virus
AU - Fujii, Hikaru
AU - Fukushi, Shuetsu
AU - Yoshikawa, Tomoki
AU - Nagata, Noriyo
AU - Taniguchi, Satoshi
AU - Shimojima, Masayuki
AU - Yamada, Souichi
AU - Tani, Hideki
AU - Uda, Akihiko
AU - Maeki, Takahiro
AU - Harada, Shizuko
AU - Kurosu, Takeshi
AU - Lim, Chang Kweng
AU - Nakayama, Eri
AU - Takayama-Ito, Mutsuyo
AU - Watanabe, Shumpei
AU - Ebihara, Hideki
AU - Morikawa, Shigeru
AU - Saijo, Masayuki
N1 - Publisher Copyright:
© 2023 The Author(s)
PY - 2024/2
Y1 - 2024/2
N2 - Heartland virus (HRTV) causes generalized symptoms, severe shock, and multiple organ failure. We previously reported that interferon-α/β receptor knockout (IFNAR-/-) mice infected intraperitoneally with 1 × 107 tissue culture-infective dose (TCID50) of HRTV died, while those subcutaneously infected with the same dose of HRTV did not. The pathophysiology of IFNAR-/- mice infected with HRTV and the mechanism underlying the difference in disease severity, which depends on HRTV infection route, were analyzed in this study. The liver, spleen, mesenteric and axillary lymph nodes, and gastrointestinal tract of intraperitoneally (I.P.) infected mice had pathological changes; however, subcutaneously (S.C.) infected mice only had pathological changes in the axillary lymph node and gastrointestinal tract. HRTV RNA levels in the mesenteric lymph node, lung, liver, spleen, kidney, stomach, intestine, and blood were significantly higher in I.P. infected mice than those in S.C. infected mice. Chemokine ligand-1 (CXCL-1), tumor necrosis factor (TNF)-α, interleukin (IL)-12, interferon (IFN)-γ, and IL-10 levels in plasma of I.P. infected mice were higher than those of S.C. infected mice. These results indicated that high levels of viral RNA and the induction of inflammatory responses in HRTV-infected IFNAR-/- mice may be associated with disease severity.
AB - Heartland virus (HRTV) causes generalized symptoms, severe shock, and multiple organ failure. We previously reported that interferon-α/β receptor knockout (IFNAR-/-) mice infected intraperitoneally with 1 × 107 tissue culture-infective dose (TCID50) of HRTV died, while those subcutaneously infected with the same dose of HRTV did not. The pathophysiology of IFNAR-/- mice infected with HRTV and the mechanism underlying the difference in disease severity, which depends on HRTV infection route, were analyzed in this study. The liver, spleen, mesenteric and axillary lymph nodes, and gastrointestinal tract of intraperitoneally (I.P.) infected mice had pathological changes; however, subcutaneously (S.C.) infected mice only had pathological changes in the axillary lymph node and gastrointestinal tract. HRTV RNA levels in the mesenteric lymph node, lung, liver, spleen, kidney, stomach, intestine, and blood were significantly higher in I.P. infected mice than those in S.C. infected mice. Chemokine ligand-1 (CXCL-1), tumor necrosis factor (TNF)-α, interleukin (IL)-12, interferon (IFN)-γ, and IL-10 levels in plasma of I.P. infected mice were higher than those of S.C. infected mice. These results indicated that high levels of viral RNA and the induction of inflammatory responses in HRTV-infected IFNAR-/- mice may be associated with disease severity.
KW - Animal model
KW - Heartland virus
KW - IFNAR mice
KW - Pathogenesis
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U2 - 10.1016/j.virusres.2023.199301
DO - 10.1016/j.virusres.2023.199301
M3 - Article
C2 - 38096954
AN - SCOPUS:85180095036
SN - 0168-1702
VL - 340
JO - Virus Research
JF - Virus Research
M1 - 199301
ER -