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Calzadilla N, Jayawardena D, Qazi A, Sharma A, Mongan K, Comiskey S, Eathara A, Saksena S, Dudeja PK, Alrefai WA, Gill RK. Serotonin Transporter Deficiency Induces Metabolic Alterations in the Ileal Mucosa. Int J Mol Sci 2024; 25:4459. [PMID: 38674044 PMCID: PMC11049861 DOI: 10.3390/ijms25084459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/09/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024] Open
Abstract
Serotonin transporter (SERT) deficiency has been implicated in metabolic syndrome, intestinal inflammation, and microbial dysbiosis. Interestingly, changes in microbiome metabolic capacity and several alterations in host gene expression, including lipid metabolism, were previously observed in SERT-/- mice ileal mucosa. However, the precise host or microbial metabolites altered by SERT deficiency that may contribute to the pleiotropic phenotype of SERT KO mice are not yet understood. This study investigated the hypothesis that SERT deficiency impacts lipid and microbial metabolite abundances in the ileal mucosa, where SERT is highly expressed. Ileal mucosal metabolomics was performed by Metabolon on wild-type (WT) and homozygous SERT knockout (KO) mice. Fluorescent-activated cell sorting (FACS) was utilized to measure immune cell populations in ileal lamina propria to assess immunomodulatory effects caused by SERT deficiency. SERT KO mice exhibited a unique ileal mucosal metabolomic signature, with the most differentially altered metabolites being lipids. Such changes included increased diacylglycerols and decreased monoacylglycerols in the ileal mucosa of SERT KO mice compared to WT mice. Further, the ileal mucosa of SERT KO mice exhibited several changes in microbial-related metabolites known to play roles in intestinal inflammation and insulin resistance. SERT KO mice also had a significant reduction in the abundance of ileal group 3 innate lymphoid cells (ILC3). In conclusion, SERT deficiency induces complex alterations in the ileal mucosal environment, indicating potential links between serotonergic signaling, gut microbiota, mucosal immunity, intestinal inflammation, and metabolic syndrome.
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Affiliation(s)
- Nathan Calzadilla
- Department of Biomedical Engineering, University of Illinois Chicago, Chicago, IL 60607, USA;
| | - Dulari Jayawardena
- Division of Gastroenterology & Hepatology, University of Illinois Chicago, Chicago, IL 60612, USA; (D.J.); (A.Q.); (A.S.); (K.M.); (S.C.); (A.E.); (S.S.); (P.K.D.); (W.A.A.)
| | - Aisha Qazi
- Division of Gastroenterology & Hepatology, University of Illinois Chicago, Chicago, IL 60612, USA; (D.J.); (A.Q.); (A.S.); (K.M.); (S.C.); (A.E.); (S.S.); (P.K.D.); (W.A.A.)
| | - Anchal Sharma
- Division of Gastroenterology & Hepatology, University of Illinois Chicago, Chicago, IL 60612, USA; (D.J.); (A.Q.); (A.S.); (K.M.); (S.C.); (A.E.); (S.S.); (P.K.D.); (W.A.A.)
| | - Kai Mongan
- Division of Gastroenterology & Hepatology, University of Illinois Chicago, Chicago, IL 60612, USA; (D.J.); (A.Q.); (A.S.); (K.M.); (S.C.); (A.E.); (S.S.); (P.K.D.); (W.A.A.)
| | - Shane Comiskey
- Division of Gastroenterology & Hepatology, University of Illinois Chicago, Chicago, IL 60612, USA; (D.J.); (A.Q.); (A.S.); (K.M.); (S.C.); (A.E.); (S.S.); (P.K.D.); (W.A.A.)
| | - Abhijith Eathara
- Division of Gastroenterology & Hepatology, University of Illinois Chicago, Chicago, IL 60612, USA; (D.J.); (A.Q.); (A.S.); (K.M.); (S.C.); (A.E.); (S.S.); (P.K.D.); (W.A.A.)
| | - Seema Saksena
- Division of Gastroenterology & Hepatology, University of Illinois Chicago, Chicago, IL 60612, USA; (D.J.); (A.Q.); (A.S.); (K.M.); (S.C.); (A.E.); (S.S.); (P.K.D.); (W.A.A.)
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Pradeep K. Dudeja
- Division of Gastroenterology & Hepatology, University of Illinois Chicago, Chicago, IL 60612, USA; (D.J.); (A.Q.); (A.S.); (K.M.); (S.C.); (A.E.); (S.S.); (P.K.D.); (W.A.A.)
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Waddah A. Alrefai
- Division of Gastroenterology & Hepatology, University of Illinois Chicago, Chicago, IL 60612, USA; (D.J.); (A.Q.); (A.S.); (K.M.); (S.C.); (A.E.); (S.S.); (P.K.D.); (W.A.A.)
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Ravinder K. Gill
- Division of Gastroenterology & Hepatology, University of Illinois Chicago, Chicago, IL 60612, USA; (D.J.); (A.Q.); (A.S.); (K.M.); (S.C.); (A.E.); (S.S.); (P.K.D.); (W.A.A.)
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
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Comiskey S, Qazi A, Eathara A, Sharma A, Calzadilla N, Saksena S, Dudeja PK, Alrefai W, Gill RK. Dietary Indole‐3‐Carbinol Supplementation Restores Epithelial Abnormalities in SAMP1/YitFc Mouse Model of Ileitis. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r4298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shane Comiskey
- MedicineUniversity of Illinois at ChicagoChicagoIL
- University of Illinois at ChicagoChicagoIL
| | - Aisha Qazi
- MedicineUniversity of Illinois at ChicagoChicagoIL
- University of Illinois at ChicagoChicagoIL
| | | | | | - Nathan Calzadilla
- MedicineUniversity of Illinois at ChicagoChicagoIL
- University of Illinois at ChicagoChicagoIL
| | - Seema Saksena
- MedicineUniversity of Illinois at ChicagoChicagoIL
- University of Illinois at ChicagoChicagoIL
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