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. 2019 Jun 12;11(6):1316.
doi: 10.3390/nu11061316.

Aronia Berry Supplementation Mitigates Inflammation in T Cell Transfer-Induced Colitis by Decreasing Oxidative Stress

Affiliations

Aronia Berry Supplementation Mitigates Inflammation in T Cell Transfer-Induced Colitis by Decreasing Oxidative Stress

Ruisong Pei et al. Nutrients. .

Abstract

Oxidative stress is involved in the pathogenesis and progression of inflammatory bowel disease. Consumption of aronia berry inhibits T cell transfer colitis, but the antioxidant mechanisms pertinent to immune function are unclear. We hypothesized that aronia berry consumption could inhibit inflammation by modulating the antioxidant function of immunocytes and gastrointestinal tissues. Colitis was induced in recombinase activating gene-1 deficient (Rag1-/-) mice injected with syngeneic CD4+CD62L+ naïve T cells. Concurrent with transfer, mice consumed either 4.5% w/w aronia berry-supplemented or a control diet for five weeks. Aronia berry inhibited intestinal inflammation evidenced by lower colon weight/length ratios, 2-deoxy-2-[18F]fluoro-d-glucose (FDG) uptake, mRNA expressions of tumor necrosis factor alpha (TNF-α), and interferon gamma (IFN-γ) in the colon. Aronia berry also suppressed systemic inflammation evidenced by lower FDG uptake in the spleen, liver, and lung. Colitis induced increased colon malondialdehyde (MDA), decreased colon glutathione peroxidase (GPx) activity, reduced glutathione (rGSH) level, and suppressed expression of antioxidant enzymes in the colon and mesenteric lymph node (MLN). Aronia berry upregulated expression of antioxidant enzymes, prevented colitis-associated depletion of rGSH, and maintained GPx activity. Moreover, aronia berry modulated mitochondria-specific antioxidant activity and decreased splenic mitochondrial H2O2 production in colitic mice. Thus, aronia berry consumption inhibits oxidative stress in the colon during T cell transfer colitis because of its multifaceted antioxidant function in both the cytosol and mitochondria of immunocytes.

Keywords: adoptive transfer colitis; aronia berry; inflammatory bowel disease; oxidative stress.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Consumption of 4.5% aronia berry-supplemented diet mitigates wasting induced by T cell transfer colitis in mice. Splenic CD4+CD62L+ cells from C57BL/6J mice were transferred to Rag1-/- mice. Mice consumed the AIN-93M diet (colitic control) or aronia-supplemented diet for five weeks. A third group of Rag1-/- mice received splenic CD4+ cells, consumed AIN-93M diet, and served as the non-colitic control. (A) Body weight changes after T cell transfer, as mean percentage of initial body weight at transfer (n = 9–10/group). Data bearing different letters indicate significant within-week differences (p < 0.05). (B) Colon weight/length ratio (n = 9–10/group). (C) Tissue 2-deoxy-2-[18F]fluoro-d-glucose (FDG) uptakes at 1 h after intravenous injection of approximately 1.85 MBq of FDG (n = 4–6/group). Groups bearing different letters indicate significant differences between treatments (p < 0.05). Data are means ± SEMs.
Figure 2
Figure 2
Aronia consumption downregulates mRNA expression of pro-inflammatory cytokines and up-regulates anti-inflammatory cytokines. Splenic CD4+CD62L+ cells from C57BL/6J mice were transferred to Rag1-/- mice. Mice consumed the AIN-93M diet (colitic control) or aronia-supplemented diet for five weeks. A third group of Rag1-/- mice received splenic CD4+ cells, consumed AIN-93M diet and served as the non-colitic control. The mRNA expressions of transcription factors of Foxp3 (forkhead box P3) and Rorc (RAR-related orphan receptor gamma), and cytokines of Il17a (interleukin 17A), Il22 (interleukin 22), Il6 (interleukin 6), Il10 (interleukin 10), Ifng (interferon-gamma), and Tnf (tumor necrosis factors) in the (A) colon (n = 4–5/group), (B) mesenteric lymph node (MLN) (n = 8–10/group), and (C) spleen (n = 3–5/group). The mRNA expressions were normalized to Eef2 (eukaryotic translation elongation factor 2) and Rplp0 (ribosomal protein large P0) genes. Data are means ± SEMs.
Figure 3
Figure 3
Aronia consumption reduces mitochondria H2O2. Splenic CD4+CD62L+ cells from C57BL/6J mice were transferred to Rag1-/- mice. Mice consumed the AIN-93M diet (colitic control) or aronia-supplemented diet for five weeks. A third group of Rag1-/- mice received splenic CD4+ cells, consumed AIN-93M diet, and served as non-colitic control. MitoP/MitoB ratio in (A) spleen and (B) colon (n = 4–5/group). Groups bearing different letters indicate significant differences between treatments (p < 0.05). Data are means ± SEMs.
Figure 4
Figure 4
Aronia consumption reduces malondialdehyde (MDA) and prevents depletion of antioxidant enzymes in colon. Splenic CD4+CD62L+ cells from C57BL/6J mice were transferred to Rag1-/- mice. Mice consumed the AIN-93M diet (colitic control) or aronia-supplemented diet for five weeks. A third group of Rag1-/- mice received splenic CD4+ cells, consumed AIN-93M diet, and served as the non-colitic control. (A) Colon MDA (n = 4–5/group). (B) Colon glutathione peroxidase (GPx) activity (n = 8–10/group). (C) Colon reduced glutathione (rGSH) (n = 8–10/group). Groups bearing different letters indicate significant differences between treatments (p < 0.05). Data are means ± SEMs.
Figure 5
Figure 5
Aronia consumption maintains mRNA expression of endogenous antioxidant enzymes. Splenic CD4+CD62L+ cells from C57BL/6J mice were transferred to Rag1-/- mice. Mice consumed the AIN-93M diet (colitic control) or aronia-supplemented diet for five weeks. A third group of Rag1-/- mice received splenic CD4+ cells, consumed AIN-93M diet, and served as the non-colitic control. The mRNA expressions of transcription factor of Nfe2l2 (erythroid-derived 2-like 2) and the downstream antioxidant enzymes of Gclc (glutamate-cysteine ligase-catalytic subunit), Gsr (glutathione reductase), Sod2 (superoxide dismutase 2), Gpx1 (glutathione peroxidase 1), Gpx2 (glutathione peroxidase 2), and Prdx1 (peroxiredoxin 1) in the (A) colon (n = 4–5/group), (B) mesenteric lymph node (MLN) (n = 9–10/group), and (C) spleen (n = 3–5/group). Gene expression was normalized to Eef2 (eukaryotic translation elongation factor 2) and Rplp0 (ribosomal protein large P0) genes. Bars bearing different letters indicate significant differences between treatments (p < 0.05). Data are means ± SEMs.
Figure 6
Figure 6
Aronia berry does not affect the expression of glucose transporters in colitic mice. Splenic CD4+CD62L+ cells from C57BL/6J mice were transferred to Rag1-/- mice. Mice consumed the AIN-93M diet (colitic control) or aronia-supplemented diet for five weeks. A third group of Rag1-/- mice received splenic CD4+ cells, consumed AIN-93M diet, and served as the non-colitic control. (A) Glut1 (glucose transporter 1) in the colon (n = 4–5/group), mesenteric lymph node (MLN) (n = 9–10/group), and spleen (n = 3–5/group). (B) Sglt1 (sodium glucose cotransporter 1) expression in colon (n = 4–5/group). The mRNA expressions in Rag1-/- mice were normalized to Eef2 (eukaryotic translation elongation factor 2) and Rplp0 (ribosomal protein large P0) genes. Bars bearing different letters indicate significant differences between treatments (p < 0.05).
Figure 7
Figure 7
Aronia consumption decreases mitochondria H2O2 in MLN but does not affect the expression of antioxidant enzymes and cytokines in the spleen. C57BL/6J mice consumed the AIN-93M diet or aronia-supplemented diet for five weeks. (A) The mRNA expressions of transcription factors of Foxp3 (forkhead box P3) and Rorc (RAR-related orphan receptor gamma), and cytokines of Il17a (interleukin 17A), Il6 (interleukin 6), Il10 (interleukin 10), Ifng (interferon-γ), and Tnf (tumor necrosis factors) in the spleen (n = 5–7/group). (B) The mRNA expressions of transcription factor of Nfe2l2 (erythroid-derived 2-like 2) and the downstream antioxidant enzymes of Gclc (glutamate-cysteine ligase-catalytic subunit), Gsr (glutathione reductase), Sod2 (superoxide dismutase 2), Gpx1 (glutathione peroxidase 1), Gpx2 (glutathione peroxidase 2), and Prdx1 (peroxiredoxin 1) in the spleen (n = 6–7/group). (C) The mRNA expressions of Glut1 (glucose transporter 1) in the spleen (n = 6–7/group). (D) MitoP/MitoB ratio in mesenteric lymph node (MLN) (n = 4–5/group). The mRNA expressions (normalized to Eef2 (eukaryotic translation elongation factor 2) and Rplp0 (ribosomal protein large P0)). Data are means ± SEMs.

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