The Open Dentistry Journal




ISSN: 1874-2106 ― Volume 13, 2019
LETTER

Immunosuppressive Effect of Mesenchymal Stromal Cells is Enhanced by IL-1α from Oral Squamous Cell Carcinoma Cells



Hiroe Morimoto-Ito1, 2, Masako Mizuno-Kamiya2, Naoki Umemura1, Yoshinori Inagaki3, Eiji Takayama1, Harumi Kawaki1, Yasunori Muramatsu4, Shinichiro Sumitomo4, Nobuo Kondoh1, *
1 Department of Oral Biochemistry, Division of Oral Structure, Function and Development, Asahi University School of Dentistry, 1851-1 Hozumi, Mizuho, Gifu, 501-0296, Japan
2 Chemistry Laboratory, Department of Business Administration, Asahi University School of Business Administration, 1851-1 Hozumi, Mizuho, Gifu 501-0296, Japan
3 Department of Anesthesiology, Division of Oral Pathogenesis and Disease Control, Asahi University School of Dentistry, 1851-1 Hozumi, Mizuho, Gifu, 501-0296, Japan
4 Department of Oral and Maxillofacial Surgery, Division of Oral Pathogenesis and Disease Control, Asahi University School of Dentistry, 1851-1 Hozumi, Mizuho, Gifu, 501-0296, Japan

Abstract

Background:

We have already reported that mouse Oral Squamous Carcinoma Cells (OSCCs) Sq-1979 specifically enhance the immunosuppressive activity of mesenchymal 10T1/2 cells via the functional soluble factor (s).

Objective:

In this report, we attempted to identify soluble factor(s) mediating the immunosuppression of Sq-1979 cells.

Methods:

L5-11 cells are a variant established from the metastatic lymph nodes of Sq-1979-implanted mice. Unlike parental Sq-1979 cells, however, L5-11 cells lack promotion of immunosuppressive activity in 10T1/2 cells. In order to identify cytokine mRNAs specifically expressed in Sq-1979 cells but not in L5-11 cells, cDNA microarray was performed. Conditioned medium from Sq-1979 cells (CM) was absorbed by several different neutralizing antibodies (abs) against the corresponding cytokines. The absorbed CM was then co-cultured with 10T1/2 cells and anti-CD3 antibody-stimulated mouse spleen cells. The Interferon (IFN) -γ producing capability of the stimulated spleen cells was evaluated using Enzyme-Linked Immunosorbent Assay (ELISA). By using a specific cytokine product instead of CM in this co-culture system the source of the immunosuppressive effect was identified.

Results:

The expression of Ccl2, Ccl7, Il1-α, IL1f6 and Il6 mRNAs was specifically elevated in Sq-1979 cells compared to L5-11 cells. The suppression of the IFN-γ producing capability of stimulated spleen cells in the co-culture system was specifically alleviated by absorbing the CM with anti-IL-1α ab. We further demonstrated that the immunosuppressive effect of CM in the co-culture system could be completely substituted by IL-1α protein (50 pmol/ ml).

Conclusion:

The immunosuppressive function of 10T1/2 cells is specifically promoted by IL-1α, secreted by Sq-1979 cells.

Keywords: OSCC, Mesenchymal stromal cell, Spleen cell, Immunosuppression, IL-1α, IFN-γ.


Article Information


Identifiers and Pagination:

Year: 2019
Volume: 13
First Page: 221
Last Page: 227
Publisher Id: TODENTJ-13-221
DOI: 10.2174/1874210601913010221

Article History:

Received Date: 28/02/2019
Revision Received Date: 23/04/2019
Acceptance Date: 23/05/2019
Electronic publication date: 30/06/2019
Collection year: 2019

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© 2019 Morimoto-Ito et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


* Address correspondence to this author at the Department of Oral Biochemistry, Asahi University School of Dentistry, 1851-1 Hozumi, Mizuho, Gifu, 501-0296, Japan. Phone: +81-058-329-1416; Fax: +81-058-329-1417; E-mail: nkondoh@dent.asahi-u.ac.jp



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