PMID- 34576286 OWN - NLM STAT- MEDLINE DCOM- 20211025 LR - 20240226 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 22 IP - 18 DP - 2021 Sep 19 TI - Increased Indoleamine 2,3-Dioxygenase Levels at the Onset of Sjogren's Syndrome in SATB1-Conditional Knockout Mice. LID - 10.3390/ijms221810125 [doi] LID - 10125 AB - Sjogren's syndrome (SS) is a chronic autoimmune disease characterized by dysfunction of salivary and lacrimal glands, resulting in xerostomia (dry mouth) and keratoconjunctivitis sicca (dry eyes). Autoantibodies, such as anti-SSA and anti-SSB antibodies, are hallmarks and important diagnostic factors for SS. In our previous study, we demonstrated that SS-like xerostomia was observed in SATB1 conditional knockout (SATB1cKO) mice, in which the floxed SATB1 gene was specifically deleted in hematopoietic cells as early as 4 weeks of age. In these mice, autoantibodies were not detected until 8 weeks of age in SATB1cKO mice, although exocrine gland function reached its lowest at this age. Therefore, other markers may be necessary for the diagnosis of SS in the early phase. Here, we found that mRNA expression of the interferongamma (IFN-gamma) gene and the IFN-responsive indoleamine 2,3-dioxygenase (IDO) gene is upregulated in the salivary glands of SATB1cKO mice after 3 and 4 weeks of age, respectively. We detected l-kynurenine (l-KYN), an intermediate of l-tryptophan (l-Trp) metabolism mediated by IDO, in the serum of SATB1cKO mice after 4 weeks of age. In addition, the upregulation of IDO expression was significantly suppressed by the administration of IFN-gamma neutralizing antibodies in SATB1cKO mice. These results suggest that the induction of IFN-dependent IDO expression is an initial event that occurs immediately after the onset of SS in SATB1cKO mice. These results also imply that serum l-KYN could be used as a marker for SS diagnosis in the early phases of the disease before autoantibodies are detectable. FAU - Tanaka, Yuriko AU - Tanaka Y AUID- ORCID: 0000-0002-9278-7677 AD - Department of Molecular Immunology, Toho University School of Medicine, Tokyo 143-8540, Japan. FAU - Onozato, Mayu AU - Onozato M AD - Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Toho University, Chiba 274-8510, Japan. FAU - Mikami, Tetuo AU - Mikami T AD - Department of Pathology, Toho University School of Medicine, Tokyo 143-8540, Japan. FAU - Kohwi-Shigematsu, Terumi AU - Kohwi-Shigematsu T AD - Department of Orofacial Sciences, University of California San Francisco School of Dentistry, San Francisco, CA 94143, USA. FAU - Fukushima, Takeshi AU - Fukushima T AUID- ORCID: 0000-0002-6086-4156 AD - Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Toho University, Chiba 274-8510, Japan. FAU - Kondo, Motonari AU - Kondo M AUID- ORCID: 0000-0002-1565-8804 AD - Department of Molecular Immunology, Toho University School of Medicine, Tokyo 143-8540, Japan. LA - eng GR - JP24390121 to M.K. and Y.T., JP26670240 to M.K., 18K07075 to Y.T./MEXT/JSPS KAKENHI/ GR - Strategic Research Foundation Grant-aided Project for Private Schools at Heisei 26th (S1411015 )/Ministry of Education, Culture, Sports, Science and Technology/ GR - Research Promotion Grant (14-02)/Toho University Graduate School of Medicine/ GR - Project Research Grants (23-4 and 26-22 to Y.T.)/Toho University School of Medicine/ GR - N/A/Public Foundation of the Vaccination Research Center/ GR - Joint research Fund to M.K., Y.T., M.O. and K.F./Toho University/ GR - Initiative for Realizing Diversity in the Research Environment/Japan Science and Technology Agency/ GR - R37CA39681 to T.K.-S./GF/NIH HHS/United States GR - Grant-in Aid for Private University Research Branding Project/Ministry of Education, Culture, Sports, Science and Technology/ GR - Grant for Research Initiative Program/Toho University/ PT - Journal Article DEP - 20210919 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Cytokines) RN - 0 (Indoleamine-Pyrrole 2,3,-Dioxygenase) RN - 0 (Inflammation Mediators) RN - 0 (Matrix Attachment Region Binding Proteins) RN - 0 (Satb1 protein, mouse) RN - 343-65-7 (Kynurenine) RN - 82115-62-6 (Interferon-gamma) RN - 8DUH1N11BX (Tryptophan) SB - IM MH - Animals MH - Cytokines/metabolism MH - Indoleamine-Pyrrole 2,3,-Dioxygenase/*metabolism MH - Inflammation Mediators/metabolism MH - Interferon-gamma/metabolism MH - Kynurenine/blood/metabolism MH - Matrix Attachment Region Binding Proteins/*deficiency/metabolism MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Saliva/metabolism MH - Salivary Glands/metabolism MH - Sjogren's Syndrome/blood/*enzymology MH - Tryptophan/metabolism MH - Up-Regulation MH - Mice PMC - PMC8468825 OTO - NOTNLM OT - Sjogren's syndrome OT - autoimmunity OT - interferon gamma OT - tryptophan metabolism COIS- The authors declare no conflict of interest. EDAT- 2021/09/29 06:00 MHDA- 2021/10/26 06:00 PMCR- 2021/09/19 CRDT- 2021/09/28 01:19 PHST- 2021/08/15 00:00 [received] PHST- 2021/09/10 00:00 [revised] PHST- 2021/09/17 00:00 [accepted] PHST- 2021/09/28 01:19 [entrez] PHST- 2021/09/29 06:00 [pubmed] PHST- 2021/10/26 06:00 [medline] PHST- 2021/09/19 00:00 [pmc-release] AID - ijms221810125 [pii] AID - ijms-22-10125 [pii] AID - 10.3390/ijms221810125 [doi] PST - epublish SO - Int J Mol Sci. 2021 Sep 19;22(18):10125. doi: 10.3390/ijms221810125.