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Wu S, Wang S, Wang L, Peng H, Zhang S, Yang Q, Huang M, Li Y, Guan S, Jiang W, Zhang Z, Bi Q, Li L, Gao Y, Xiong P, Zhong Z, Xu B, Deng Y, Deng Y. Docosahexaenoic acid supplementation represses the early immune response against murine cytomegalovirus but enhances NK cell effector function. BMC Immunol 2022; 23:17. [PMID: 35439922 PMCID: PMC9017742 DOI: 10.1186/s12865-022-00492-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 04/12/2022] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Docosahexaenoic acid (DHA) supplementation is beneficial for several chronic diseases; however, its effect on immune regulation is still debated. Given the prevalence of cytomegalovirus (CMV) infection and because natural killer (NK) cells are a component of innate immunity critical for controlling CMV infection, the current study explored the effect of a DHA-enriched diet on susceptibility to murine (M) CMV infection and the NK cell effector response to MCMV infection. RESULTS Male C57BL/6 mice fed a control or DHA-enriched diet for 3 weeks were infected with MCMV and sacrificed at the indicated time points postinfection. Compared with control mice, DHA-fed mice had higher liver and spleen viral loads at day 7 postinfection, but final MCMV clearance was not affected. The total numbers of NK cells and their terminal mature cell subset (KLRG1+ and Ly49H+ NK cells) were reduced compared with those in control mice at day 7 postinfection but not day 21. DHA feeding resulted in higher IFN-γ and granzyme B expression in splenic NK cells at day 7 postinfection. A mechanistic analysis showed that the splenic NK cells of DHA-fed mice had enhanced glucose uptake, increased CD71 and CD98 expression, and higher mitochondrial mass than control mice. In addition, DHA-fed mice showed reductions in the total numbers and activation levels of CD4+ and CD8+ T cells. CONCLUSIONS These results suggest that DHA supplementation represses the early response to CMV infection but preserves NK cell effector functions by improving mitochondrial activity, which may play critical roles in subsequent MCMV clearance.
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Affiliation(s)
- Shuting Wu
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Shanshan Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, 510060, People's Republic of China
| | - Lili Wang
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Hongyan Peng
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Shuju Zhang
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Qinglan Yang
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Minghui Huang
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Yana Li
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Shuzhen Guan
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Wenjuan Jiang
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Zhaohui Zhang
- Institute of Materia Medica, College of Pharmacy, Army Medical University (Third Military Medical University), Chongqing, 400038, People's Republic of China
| | - Qinghua Bi
- Institute of Materia Medica, College of Pharmacy, Army Medical University (Third Military Medical University), Chongqing, 400038, People's Republic of China
| | - Liping Li
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Yuan Gao
- Southwest Hospital/Southwest Eye Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, People's Republic of China
| | - Peiwen Xiong
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China.,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China
| | - Zhaoyang Zhong
- Cancer Center, Daping Hospital and Research Institute of Surgery, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Bo Xu
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, Xuzhou, 221002, People's Republic of China.
| | - Yafei Deng
- Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, Hunan, People's Republic of China. .,Pediatric Intensive Care Unit, Hunan Children's Hospital, University of South China, Changsha, Hunan, People's Republic of China.
| | - Youcai Deng
- Institute of Materia Medica, College of Pharmacy, Army Medical University (Third Military Medical University), Chongqing, 400038, People's Republic of China.
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Lu YY, Liu XL, Huang Y, Liao Y, Xi T, Zhang YN, Zhang LL, Shu SN, Fang F. Short-lived AIM2 Inflammasome Activation Relates to Chronic MCMV Infection in BALB/c Mice. Curr Med Sci 2019; 39:899-905. [PMID: 31845220 DOI: 10.1007/s11596-019-2121-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 10/20/2019] [Indexed: 12/19/2022]
Abstract
Absent in melanoma 2 (AIM2) inflammasome is a crucial link bridging the innate host defense and the subsequent adaptive immunity when activated by exogenous double stranded DNA (dsDNA). Through establishing models of disseminated murine cytomegalovirus (MCMV) infection in BALB/c and C57BL/6 mice, we evaluated dynamic expression of AIM2 inflammasome components and its relationship with pathological damage and viral replication, trying to figure out whether AIM2 inflammasome is related to the chronic mechanism of MCMV. BALB/c and C57BL/6 mice were sacrificed on day 0, 1, 3, 7, 14 and 28 post infection. Expression levels of AIM2, pro-caspase-1, caspase-1 p20, pro-IL1β and mature IL1β in primary peritoneal macrophages (PMs) and spleens were detected by Western blotting. Contents of IL18 in the serum were detected by ELISA. Pathological examinations of livers were performed, and mRNA levels of MCMV glycoprotein B (gB) in salivary glands also assessed. Results showed that expression levels of AIM2 in PMs and spleens of C57BL/6 mice increased on day 3, even continued to day 28; caspase-1 p20 and mature IL1β increased on day 7, 14 and 28; the persistently high expression of IL18 in the serum started on day 1, showing a double peak curve. As for BALB/c mice, expression of AIM2 in PMs increased on day 1 and day 7, while contents of AIM2 in spleens increased on day 1 and day 3; caspase-1 p20 and mature IL1β merely increased 7 days fter infection. Thereafter, expression levels of AIM2, caspase-1 p20, mature IL1β and IL18 were limited; the duration of AIM2 inflammasome activation in BALB/c mice was much shorter than that in C57BL/6 mice. The severer pathological damage and more viral replications in BALB/c mice further proved the deficient antiviral immunity to MCMV. In conclusion, the activation of AIM2 inflammasome in BALB/c mice was short-lived, which is quite possibly related to the chronicity of MCMV infection.
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Affiliation(s)
- Yuan-Yuan Lu
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xing-Lou Liu
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yuan Huang
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yi Liao
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ting Xi
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ya-Nan Zhang
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Lin-Lin Zhang
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Sai-Nan Shu
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Feng Fang
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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