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Dai X, Zhao W, Zhan J, Zeng S, Ran D, Zhang H, Song Z, Song KH, Wu L. B cells present skewed profile and lose the function of supporting T cell inflammation after Roux-en-Y gastric bypass. Int Immunopharmacol 2016; 43:16-22. [PMID: 27936460 DOI: 10.1016/j.intimp.2016.11.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 11/05/2016] [Accepted: 11/29/2016] [Indexed: 01/07/2023]
Abstract
Bariatric surgeries, including Roux-en-Y gastric bypass (RYGB) are currently the best treatment for obesity and obesity-related comorbidities, such as type 2 diabetes. However, the underlying mechanism of bariatric surgeries is not entirely understood. Further investigations are needed to improve the success rate and achieve sustained health benefits. Given that B cell dysregulation is a critical component of etiology in inflammatory diseases, whereas obesity and type 2 diabetes represent two major inflammatory disorders, we investigated the effect of RYGB on B cell inflammation. We found that B cells after RYGB presented significantly elevated frequency of interleukin (IL)-10-producing cells and reduced frequency of IL-6-producing cells compared to those before RYGB. When grouping B cell subsets into regulatory (secreting IL-10 and transforming growth factor beta [TGF-β]) and effector (secreting IL-2, IL-4, IL-6, IL-12, interferon gamma [IFN-γ] and tumor necrosis factor alpha [TNF-α]) types, we found that after RYGB, the regulatory to effector B cell ratio was significantly increased. Function analyses showed that B cells before RYGB supported IL-17 secretion from T cells whereas these cells after RYGB lost such capacity. B cells after RYGB also gained the capacity to suppress T cell IFN-γ production through TGF-β-mediated effects, a feature not present in B cells before RYGB. Interestingly, the regulatory to effector B cell ratio was directly associated with the reductions in obesity markers following RYGB, such as BMI and fat mass percentage. Together, these results demonstrated a potential mechanism through which RYGB promoted amelioration of obesity and type 2 diabetes.
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Affiliation(s)
- Xiaojiang Dai
- Surgical Center for Obesity and Diabetes, Jinshazhou Hospital, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510000, China
| | - Weiguo Zhao
- Surgical Center for Obesity and Diabetes, Jinshazhou Hospital, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510000, China
| | - Junfang Zhan
- Health Management Center, Guangzhou First People's Hospital, Guangzhou Medical College, Guangzhou, Guangdong 510180, China
| | - Songhua Zeng
- Surgical Center for Obesity and Diabetes, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong 510010, China
| | - Dongzhi Ran
- Surgical Center for Obesity and Diabetes, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong 510010, China
| | - Hongbin Zhang
- Surgical Center for Obesity and Diabetes, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong 510010, China
| | - Zhigao Song
- Surgical Center for Obesity and Diabetes, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong 510010, China
| | - Ken H Song
- DICAT Biomedical Computation Centre, Vancouver, British Columbia, Canada
| | - Liangping Wu
- Surgical Center for Obesity and Diabetes, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong 510010, China.
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Kuiper J, Rothova A, de Boer J, Radstake T. The immunopathogenesis of birdshot chorioretinopathy; a bird of many feathers. Prog Retin Eye Res 2015; 44:99-110. [DOI: 10.1016/j.preteyeres.2014.11.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 10/22/2014] [Accepted: 11/18/2014] [Indexed: 01/01/2023]
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