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2019 ; 66
(2
): 831-841
Nephropedia Template TP
gab.com Text
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English Wikipedia
Co-localization of Middle East respiratory syndrome coronavirus (MERS-CoV) and
dipeptidyl peptidase-4 in the respiratory tract and lymphoid tissues of pigs and
llamas
#MMPMID30520548
Te N
; Vergara-Alert J
; Lehmbecker A
; Pérez M
; Haagmans BL
; Baumgärtner W
; Bensaid A
; Segalés J
Transbound Emerg Dis
2019[Mar]; 66
(2
): 831-841
PMID30520548
show ga
This study investigated the co-localization of the Middle East respiratory
syndrome coronavirus (MERS-CoV) and its receptor dipeptidyl peptidase-4 (DPP4) by
immunohistochemistry (IHC) across respiratory and lymphoid organs of
experimentally MERS-CoV infected pigs and llamas. Also, scanning electron
microscopy was performed to assess the ciliary integrity of respiratory
epithelial cells in both species. In pigs, on day 2 post-inoculation (p.i.),
DPP4-MERS-CoV co-localization was detected in medial turbinate epithelium. On day
4 p.i., the virus/receptor co-localized in frontal and medial turbinate
epithelial cells in pigs, and epithelial cells distributed unevenly through the
whole nasal cavity and in the cervical lymph node in llamas. MERS-CoV viral
nucleocapsid was mainly detected in upper respiratory tract sites on days 2 and
4 p.i. in pigs and day 4 p.i. in llamas. No MERS-CoV was detected on day 24 p.i.
in any tissue by IHC. While pigs showed severe ciliary loss in the nasal mucosa
both on days 2 and 4 p.i. and moderate loss in the trachea on days 4 and 24 p.i.,
ciliation of respiratory organs in llamas was not significantly affected.
Obtained data confirm the role of DPP4 for MERS-CoV entry in respiratory
epithelial cells of llamas. Notably, several nasal epithelial cells in pigs were
found to express viral antigen but not DPP4, suggesting the possible existence of
other molecule/s facilitating virus entry or down regulation of DPP4 upon
infection.