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Initial human T-cell leukemia virus type 1 infection of the salivary gland epithelial cells requires a biofilm-like structure


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Title: Initial human T-cell leukemia virus type 1 infection of the salivary gland epithelial cells requires a biofilm-like structure
Authors: Nakamura, Hideki / Shimizu, Toshimasa / Takatani, Ayuko / Suematsu, Takashi / Nakamura, Tatsufumi / Kawakami, Atsushi
Issue Date: 21-Jun-2019
Publisher: Elsevier B.V.
Citation: Virus Research, 269, art.no.197643; 2019
Abstract: The initial phase of the human T cell leukemia virus-1 (HTLV-1) infection of salivary gland epithelial cells (SGECs) was examined. SGECs of patients with Sjögren's syndrome (SS) and non-SS subjects were co-cultured with the HTLV-1-infected cell line HCT-5 or MOLT-4, then immunofluorescence (IF), scanning and transmission electron microscopy (SEM/TEM) were employed. The extracellular matrix and linker proteins galectin-3, agrin, and tetherin were expressed on the surfaces of both HCT-5 and MOLT-4 cells. HTLV-1 Gag-positive spots were observed on adjacent SGECs after 1 h of co-culture with HCT-5. Both in subjects with and those without SS, agrin and tetherin were co-expressed with HTLV-1 Gag on SGECs after co-culture with HCT-5,although no polarization of HTLV-1 Gag and relevant molecules was observed. SEM showed HTLV-1 virions that were found on HCT-5 were observed in the interfaces between HCT-5 cells and SGECs. TEM imaging showed that HTLV-1 virions were transmitted to SGECs at the interface with thin film-like structure, while HTLV-1 virions were released from the surface of HCT-5 cells. No endogenous retroviruses were observed. These results showed that the initial phase of HTLV-1 infection toward SGECs of SS was mediated not by viral synapses, but by biofilm-like components.
Keywords: Biofilm / HTLV-1 / Salivary gland epithelial cell / T cell
URI: http://hdl.handle.net/10069/39328
ISSN: 01681702
DOI: 10.1016/j.virusres.2019.197643
Rights: © 2019 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/39328

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