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Qu T, He S, Wu Y, Wang Y, Ni C, Wen S, Cui B, Cheng Y, Wen L. Transcriptome Analysis Reveals the Immunoregulatory Activity of Rice Seed-Derived Peptide PEP1 on Dendritic Cells. Molecules 2023; 28:5224. [PMID: 37446885 DOI: 10.3390/molecules28135224] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/29/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023] Open
Abstract
Some food-derived bioactive peptides exhibit prominent immunoregulatory activity. We previously demonstrated that the rice-derived PEP1 peptide, GIAASPFLQSAAFQLR, has strong immunological activity. However, the mechanism of this action is still unclear. In the present study, full-length transcripts of mouse dendritic cells (DC2.4) treated with PEP1 were sequenced using the PacBio sequencing platform, and the transcriptomes were compared via RNA sequencing (RNA-Seq). The characteristic markers of mature DCs, the cluster of differentiation CD86, and the major histocompatibility complex (MHC-II), were significantly upregulated after the PEP1 treatment. The molecular docking suggested that hydrogen bonding and electrostatic interactions played important roles in the binding between PEP1, MHC-II, and the T-cell receptor (TCR). In addition, the PEP1 peptide increased the release of anti-inflammatory factors (interleukin-4 and interleukin-10) and decreased the release of pro-inflammatory factors (interleukin-6 and tumor necrosis factor-α). Furthermore, the RNA-seq results showed the expression of genes involved in several signaling pathways, such as the NF-κB, MAPK, JAK-STAT, and TGF-β pathways, were regulated by the PEP1 treatment, and the changes confirmed the immunomodulatory effect of PEP1 on DC2.4 cells. This findings revealed that the PEP1 peptide, derived from the byproduct of rice processing, is a potential natural immunoregulatory alternative for the treatment of inflammation.
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Affiliation(s)
- Tingmin Qu
- School of Food Science and Bioengineering, Hunan Provincial Key Laboratory of Cytochemistry, Changsha University of Science & Technology, Changsha 410114, China
| | - Shuwen He
- School of Food Science and Bioengineering, Hunan Provincial Key Laboratory of Cytochemistry, Changsha University of Science & Technology, Changsha 410114, China
| | - Ying Wu
- School of Food Science and Bioengineering, Hunan Provincial Key Laboratory of Cytochemistry, Changsha University of Science & Technology, Changsha 410114, China
| | - Yingying Wang
- School of Food Science and Bioengineering, Hunan Provincial Key Laboratory of Cytochemistry, Changsha University of Science & Technology, Changsha 410114, China
| | - Ce Ni
- School of Food Science and Bioengineering, Hunan Provincial Key Laboratory of Cytochemistry, Changsha University of Science & Technology, Changsha 410114, China
| | - Shiyu Wen
- School of Food Science and Bioengineering, Hunan Provincial Key Laboratory of Cytochemistry, Changsha University of Science & Technology, Changsha 410114, China
| | - Bo Cui
- School of Food Science and Engineering, Qilu University of Technology, Jinan 250353, China
| | - Yunhui Cheng
- School of Food Science and Bioengineering, Hunan Provincial Key Laboratory of Cytochemistry, Changsha University of Science & Technology, Changsha 410114, China
- School of Food Science and Engineering, Qilu University of Technology, Jinan 250353, China
| | - Li Wen
- School of Food Science and Bioengineering, Hunan Provincial Key Laboratory of Cytochemistry, Changsha University of Science & Technology, Changsha 410114, China
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Kawakami K, Moritani C, Uraji M, Fujita A, Kawakami K, Hatanaka T, Suzaki E, Tsuboi S. Hepatoprotective effects of rice-derived peptides against acetaminophen-induced damage in mice. J Clin Biochem Nutr 2016; 60:115-120. [PMID: 28366990 PMCID: PMC5370527 DOI: 10.3164/jcbn.16-44] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 08/18/2016] [Indexed: 12/14/2022] Open
Abstract
Glutathione, the most abundant intracellular antioxidant, protects cells against reactive oxygen species induced oxidative stress and regulates intracellular redox status. We found that rice peptides increased intracellular glutathione levels in human hepatoblastoma HepG2 cells. Acetaminophen is a commonly used analgesic. However, an overdose of acetaminophen causes severe hepatotoxicity via depletion of hepatic glutathione. Here, we investigated the protective effects of rice peptides on acetaminophen-induced hepatotoxicity in mice. ICR mice were orally administered rice peptides (0, 100 or 500 mg/kg) for seven days, followed by the induction of hepatotoxicity via intraperitoneal injection of acetaminophen (700 mg/kg). Pretreatment with rice peptides significantly prevented increases in serum alanine aminotransferase, aspartate aminotransferase, and lactate dehydrogenase levels and protected against hepatic glutathione depletion. The expression of γ-glutamylcysteine synthetase, a key regulatory enzyme in the synthesis of glutathione, was decreased by treatment with acetaminophen, albeit rice peptides treatment recovered its expression compared to that achieved treatment with acetaminophen. In addition, histopathological evaluation of the livers also revealed that rice peptides prevented acetaminophen-induced centrilobular necrosis. These results suggest that rice peptides increased intracellular glutathione levels and could protect against acetaminophen-induced hepatotoxicity in mice.
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Affiliation(s)
- Kayoko Kawakami
- School of Pharmacy, Shujitsu University, 1-6-1 Nishigawara, Naka-Ku, Okayama 703-8516, Japan
| | - Chie Moritani
- School of Pharmacy, Shujitsu University, 1-6-1 Nishigawara, Naka-Ku, Okayama 703-8516, Japan
| | - Misugi Uraji
- Okayama Prefectural Technology Canter for Agriculture, Forestry and Fisheries, Research Institute for Biological Sciences (RIBS), Okayama, 7549-1 Kibichuo-cho, Kaga-gun, Okayama 716-1241, Japan
| | - Akiko Fujita
- SATAKE Corporation, 2-30 Saijo Nishihonmachi, Higashi-Hiroshima-shi, Hiroshima 739-8602, Japan
| | - Koji Kawakami
- SATAKE Corporation, 2-30 Saijo Nishihonmachi, Higashi-Hiroshima-shi, Hiroshima 739-8602, Japan
| | - Tadashi Hatanaka
- Okayama Prefectural Technology Canter for Agriculture, Forestry and Fisheries, Research Institute for Biological Sciences (RIBS), Okayama, 7549-1 Kibichuo-cho, Kaga-gun, Okayama 716-1241, Japan
| | - Etsuko Suzaki
- School of Pharmacy, Shujitsu University, 1-6-1 Nishigawara, Naka-Ku, Okayama 703-8516, Japan
| | - Seiji Tsuboi
- School of Pharmacy, Shujitsu University, 1-6-1 Nishigawara, Naka-Ku, Okayama 703-8516, Japan
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