1
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Pereira GV, Boudaud M, Wolter M, Alexander C, De Sciscio A, Grant ET, Trindade BC, Pudlo NA, Singh S, Campbell A, Shan M, Zhang L, Yang Q, Willieme S, Kim K, Denike-Duval T, Fuentes J, Bleich A, Schmidt TM, Kennedy L, Lyssiotis CA, Chen GY, Eaton KA, Desai MS, Martens EC. Opposing diet, microbiome, and metabolite mechanisms regulate inflammatory bowel disease in a genetically susceptible host. Cell Host Microbe 2024; 32:527-542.e9. [PMID: 38513656 DOI: 10.1016/j.chom.2024.03.001] [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: 06/30/2023] [Revised: 12/18/2023] [Accepted: 03/01/2024] [Indexed: 03/23/2024]
Abstract
Inflammatory bowel diseases (IBDs) are chronic conditions characterized by periods of spontaneous intestinal inflammation and are increasing in industrialized populations. Combined with host genetics, diet and gut bacteria are thought to contribute prominently to IBDs, but mechanisms are still emerging. In mice lacking the IBD-associated cytokine, interleukin-10, we show that a fiber-deprived gut microbiota promotes the deterioration of colonic mucus, leading to lethal colitis. Inflammation starts with the expansion of natural killer cells and altered immunoglobulin-A coating of some bacteria. Lethal colitis is then driven by Th1 immune responses to increased activities of mucin-degrading bacteria that cause inflammation first in regions with thinner mucus. A fiber-free exclusive enteral nutrition diet also induces mucus erosion but inhibits inflammation by simultaneously increasing an anti-inflammatory bacterial metabolite, isobutyrate. Our findings underscore the importance of focusing on microbial functions-not taxa-contributing to IBDs and that some diet-mediated functions can oppose those that promote disease.
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Affiliation(s)
| | - Marie Boudaud
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg
| | - Mathis Wolter
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg; Faculty of Science, Technology and Medicine, University of Luxembourg, 4365 Esch-sur-Alzette, Luxembourg
| | - Celeste Alexander
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Alessandro De Sciscio
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg
| | - Erica T Grant
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg; Faculty of Science, Technology and Medicine, University of Luxembourg, 4365 Esch-sur-Alzette, Luxembourg
| | | | - Nicholas A Pudlo
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Shaleni Singh
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Austin Campbell
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Mengrou Shan
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA; Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Li Zhang
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA; Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Qinnan Yang
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Stéphanie Willieme
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg
| | - Kwi Kim
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Trisha Denike-Duval
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Jaime Fuentes
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - André Bleich
- Institute for Laboratory Animal Science, Hanover Medical School, Hanover, Germany
| | - Thomas M Schmidt
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA; Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA; Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, USA
| | - Lucy Kennedy
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Costas A Lyssiotis
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA; Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Grace Y Chen
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Kathryn A Eaton
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Mahesh S Desai
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg; Odense Research Center for Anaphylaxis, Department of Dermatology and Allergy Center, Odense University Hospital, University of Southern Denmark, Odense, Denmark.
| | - Eric C Martens
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA.
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Medeiros MCD, The S, Bellile E, Russo N, Schmitd L, Danella E, Singh P, Banerjee R, Bassis C, Murphy GR, Sartor MA, Lombaert I, Schmidt TM, Eisbruch A, Murdoch-Kinch CA, Rozek L, Wolf GT, Li G, Chen GY, D'Silva NJ. Salivary microbiome changes distinguish response to chemoradiotherapy in patients with oral cancer. Microbiome 2023; 11:268. [PMID: 38037123 PMCID: PMC10687843 DOI: 10.1186/s40168-023-01677-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 09/26/2023] [Indexed: 12/02/2023]
Abstract
BACKGROUND Oral squamous cell carcinoma (SCC) is associated with oral microbial dysbiosis. In this unique study, we compared pre- to post-treatment salivary microbiome in patients with SCC by 16S rRNA gene sequencing and examined how microbiome changes correlated with the expression of an anti-microbial protein. RESULTS Treatment of SCC was associated with a reduction in overall bacterial richness and diversity. There were significant changes in the microbial community structure, including a decrease in the abundance of Porphyromonaceae and Prevotellaceae and an increase in Lactobacillaceae. There were also significant changes in the microbial community structure before and after treatment with chemoradiotherapy, but not with surgery alone. In patients treated with chemoradiotherapy alone, several bacterial populations were differentially abundant between responders and non-responders before and after therapy. Microbiome changes were associated with a change in the expression of DMBT1, an anti-microbial protein in human saliva. Additionally, we found that salivary DMBT1, which increases after treatment, could serve as a post-treatment salivary biomarker that links to microbial changes. Specifically, post-treatment increases in human salivary DMBT1 correlated with increased abundance of Gemella spp., Pasteurellaceae spp., Lactobacillus spp., and Oribacterium spp. This is the first longitudinal study to investigate treatment-associated changes (chemoradiotherapy and surgery) in the oral microbiome in patients with SCC along with changes in expression of an anti-microbial protein in saliva. CONCLUSIONS The composition of the oral microbiota may predict treatment responses; salivary DMBT1 may have a role in modulating the oral microbiome in patients with SCC. After completion of treatment, 6 months after diagnosis, patients had a less diverse and less rich oral microbiome. Leptotrichia was a highly prevalent bacteria genus associated with disease. Expression of DMBT1 was higher after treatment and associated with microbiome changes, the most prominent genus being Gemella Video Abstract.
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Affiliation(s)
- Marcell Costa de Medeiros
- Periodontics and Oral Medicine, University of Michigan School of Dentistry, 1011 North University Ave, Room G018, Ann Arbor, MI, 48109-1078, USA
| | - Stephanie The
- Cancer Data Science Shared Resource, University of Michigan Medical School, 1500 E. Medical Center Dr, Ann Arbor, MI, USA
| | - Emily Bellile
- Cancer Data Science Shared Resource, University of Michigan Medical School, 1500 E. Medical Center Dr, Ann Arbor, MI, USA
| | - Nickole Russo
- Periodontics and Oral Medicine, University of Michigan School of Dentistry, 1011 North University Ave, Room G018, Ann Arbor, MI, 48109-1078, USA
| | - Ligia Schmitd
- Periodontics and Oral Medicine, University of Michigan School of Dentistry, 1011 North University Ave, Room G018, Ann Arbor, MI, 48109-1078, USA
| | - Erika Danella
- Periodontics and Oral Medicine, University of Michigan School of Dentistry, 1011 North University Ave, Room G018, Ann Arbor, MI, 48109-1078, USA
| | - Priyanka Singh
- Periodontics and Oral Medicine, University of Michigan School of Dentistry, 1011 North University Ave, Room G018, Ann Arbor, MI, 48109-1078, USA
| | - Rajat Banerjee
- Periodontics and Oral Medicine, University of Michigan School of Dentistry, 1011 North University Ave, Room G018, Ann Arbor, MI, 48109-1078, USA
| | - Christine Bassis
- Internal Medicine, University of Michigan Medical School, 1500 East Medical Center Drive, Ann Arbor, MI, 331248109, USA
| | - George R Murphy
- Biologic and Materials Sciences and Prosthodontics, University of Michigan School of Dentistry, 1011 N. University Ave, Ann Arbor, MI, USA
- Biointerfaces Institute, Ann Arbor, MI, USA
| | - Maureen A Sartor
- Computational Medicine and Bioinformatics, University of Michigan Medical School, 1500 E. Medical Center Dr, Ann Arbor, MI, USA
| | - Isabelle Lombaert
- Biologic and Materials Sciences and Prosthodontics, University of Michigan School of Dentistry, 1011 N. University Ave, Ann Arbor, MI, USA
- Biointerfaces Institute, Ann Arbor, MI, USA
| | - Thomas M Schmidt
- Microbiology and Immunology, University of Michigan Medical School, 1500 E. Medical Center Dr, Ann Arbor, MI, USA
| | - Avi Eisbruch
- Radiation Oncology, University of Michigan Medical School, 1500 E. Medical Center Dr, Ann Arbor, MI, USA
| | - Carol Anne Murdoch-Kinch
- Oral Pathology, Medicine and Radiology, Indiana University School of Dentistry, 1011 North Michigan St, Indianapolis, IN, USA
| | - Laura Rozek
- Environmental Health Sciences, University of Michigan Medical School, 1500 E. Medical Center Dr, Ann Arbor, MI, USA
| | - Gregory T Wolf
- Otolaryngology, University of Michigan Medical School, 1500 E. Medical Center Dr, Ann Arbor, MI, USA
| | - Gen Li
- Biostatistics, University of Michigan School of Public Health, University of Michigan Medical School, 1500 E. Medical Center Dr, Ann Arbor, MI, USA
| | - Grace Y Chen
- Internal Medicine, University of Michigan Medical School, 1500 East Medical Center Drive, Ann Arbor, MI, 331248109, USA.
| | - Nisha J D'Silva
- Periodontics and Oral Medicine, University of Michigan School of Dentistry, 1011 North University Ave, Room G018, Ann Arbor, MI, 48109-1078, USA.
- Pathology, University of Michigan Medical School, 1500 E. Medical Center Dr, Ann Arbor, MI, USA.
- Rogel Cancer Center, Ann Arbor, MI, USA.
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Sun XY, Li J, Yue B, Xu R, Jia M, Gao Y, Chen GY. [Pathological features of early gastric cancer and its background mucosa after eradication of Helicobacter pylori and their implications for biopsy diagnosis]. Zhonghua Bing Li Xue Za Zhi 2023; 52:460-465. [PMID: 37106287 DOI: 10.3760/cma.j.cn112151-20220725-00649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Objective: To investigate the clinicopathological changes of early gastric cancer, especially its background mucosa, after the eradication of Helicobacter pylori (H. pylori), and to investigate the causes of underdiagnosis in preoperative biopsy pathology. Methods: Ninety cases of early gastric cancer after H. pylori eradication and 120 cases of endoscopic submucosal dissection (ESD) specimens without H. pylori eradication and their corresponding biopsy specimens were collected from Beijing Friendship Hospital Affiliated to Capital Medical University during 2016-2021. The clinicopathological data of the patients were analyzed, and the histopathological characteristics and immunophenotypic results compared. Results: Compared with the early gastric cancer without H. pylori eradication history, the histopathological type of early gastric cancer after H. pylori eradication was differentiated adenocarcinoma, with staggered distribution of cancerous and non-cancerous epithelium in the tumor area. The morphologic characteristics of gastric mucosa in the background of early gastric cancer after H. pylori eradication, were distinctive, including widening of the opening of enterosylated glandular ducts, serrated change of luminal margin, eosinophilic and microvesicular cytoplasm of enterosylated epithelium. Low-grade atypia existed in gastric cancer epithelial cells after sterilization, which might lead to underdiagnosis or missed diagnosis in biopsy pathology. Conclusions: Early gastric cancer and its background mucosa after H. pylori eradication have unique morphological characteristics, which can be used as a clue for pathological diagnosis, improve the accuracy of biopsy pathology and reduce the underdiagnosis.
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Affiliation(s)
- X Y Sun
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China Department of Pathology, Zibo Central Hospital, Zibo 255036, China
| | - J Li
- Department of Pathology, Zibo Central Hospital, Zibo 255036, China
| | - B Yue
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - R Xu
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - M Jia
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Y Gao
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - G Y Chen
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
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4
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Zhang T, Holman J, McKinstry D, Trindade BC, Eaton KA, Castrejon JM, Ho S, Wells E, Yuan H, Wen B, Sun D, Chen GY, Li Y. Corrigendum to "A steamed broccoli sprout diet preparation that reduces colitis via the gut microbiota" [J Nutr Biochem 2023;112:109215]. J Nutr Biochem 2023; 117:109340. [PMID: 37059606 DOI: 10.1016/j.jnutbio.2023.109340] [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: 04/16/2023]
Affiliation(s)
- Tao Zhang
- School of Pharmacy, Husson University, Bangor, Maine, USA
| | - Johanna Holman
- College of Science and Humanities, Husson University, Bangor, Maine, USA
| | - Delaney McKinstry
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, Michigan, USA
| | - Bruno C Trindade
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Kathryn A Eaton
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
| | - Jonny Mendoza Castrejon
- Postbac Research Education Program, University of Michigan, Ann Arbor, Michigan, USA; Currently at Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Sharon Ho
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, Michigan, USA
| | - Emily Wells
- School of Pharmacy, Husson University, Bangor, Maine, USA
| | - Hebao Yuan
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, Michigan, USA
| | - Bo Wen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, Michigan, USA
| | - Duxin Sun
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, Michigan, USA
| | - Grace Y Chen
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
| | - Yanyan Li
- College of Science and Humanities, Husson University, Bangor, Maine, USA.
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5
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Pereira GV, Boudaud M, Wolter M, Alexander C, De Sciscio A, Grant ET, Trindade BC, Pudlo NA, Singh S, Campbell A, Shan M, Zhang L, Willieme S, Kim K, Denike-Duval T, Bleich A, Schmidt TM, Kennedy L, Lyssiotis CA, Chen GY, Eaton KA, Desai MS, Martens EC. Unravelling specific diet and gut microbial contributions to inflammatory bowel disease. Res Sq 2023:rs.3.rs-2518251. [PMID: 36993463 PMCID: PMC10055531 DOI: 10.21203/rs.3.rs-2518251/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Inflammatory bowel disease (IBD) is a chronic condition characterized by periods of spontaneous intestinal inflammation and is increasing in industrialized populations. Combined with host genetic predisposition, diet and gut bacteria are thought to be prominent features contributing to IBD, but little is known about the precise mechanisms involved. Here, we show that low dietary fiber promotes bacterial erosion of protective colonic mucus, leading to lethal colitis in mice lacking the IBD-associated cytokine, interleukin-10. Diet-induced inflammation is driven by mucin-degrading bacteria-mediated Th1 immune responses and is preceded by expansion of natural killer T cells and reduced immunoglobulin A coating of some bacteria. Surprisingly, an exclusive enteral nutrition diet, also lacking dietary fiber, reduced disease by increasing bacterial production of isobutyrate, which is dependent on the presence of a specific bacterial species, Eubacterium rectale. Our results illuminate a mechanistic framework using gnotobiotic mice to unravel the complex web of diet, host and microbial factors that influence IBD.
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Affiliation(s)
| | - Marie Boudaud
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg
| | - Mathis Wolter
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg
- Faculty of Science, Technology and Medicine, University of Luxembourg, 4365 Esch-sur-Alzette, Luxembourg
| | - Celeste Alexander
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Alessandro De Sciscio
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg
| | - Erica. T. Grant
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg
- Faculty of Science, Technology and Medicine, University of Luxembourg, 4365 Esch-sur-Alzette, Luxembourg
| | | | - Nicholas A. Pudlo
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Shaleni Singh
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Austin Campbell
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Mengrou Shan
- Dept. of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Dept. of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Li Zhang
- Dept. of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Dept. of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Stéphanie Willieme
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg
| | - Kwi Kim
- Dept. of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Trisha Denike-Duval
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - André Bleich
- Institute for Laboratory Animal Science, Hanover Medical School, Hanover, Germany
| | - Thomas M. Schmidt
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
- Dept. of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Dept. of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Lucy Kennedy
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Costas A. Lyssiotis
- Dept. of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Dept. of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Grace Y. Chen
- Dept. of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Kathryn A. Eaton
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Mahesh S. Desai
- Department of Infection and Immunity, Luxembourg Institute of Health, 4354 Esch-sur-Alzette, Luxembourg
- Odense Research Center for Anaphylaxis, Department of Dermatology and Allergy Center, Odense University Hospital, University of Southern Denmark, 5000 Odense, Denmark
| | - Eric C. Martens
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
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6
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Affiliation(s)
- Grace Y Chen
- From the University of Michigan Hospital, Ann Arbor, MI
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7
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Zhang T, Holman J, McKinstry D, Trindade BC, Eaton KA, Mendoza-Castrejon J, Ho S, Wells E, Yuan H, Wen B, Sun D, Chen GY, Li Y. A steamed broccoli sprout diet preparation that reduces colitis via the gut microbiota. J Nutr Biochem 2023; 112:109215. [PMID: 36370930 DOI: 10.1016/j.jnutbio.2022.109215] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/10/2022]
Abstract
Sulforaphane is a bioactive metabolite with anti-inflammatory activity and is derived from the glucosinolate glucoraphanin, which is highly abundant in broccoli sprouts. However, due to its inherent instability its use as a therapeutic against inflammatory diseases has been limited. There are few studies to investigate a whole food approach to increase sulforaphane levels with therapeutic effect and reduce inflammation. In the current study, using a mouse model of inflammatory bowel disease, we investigated the ability of steamed broccoli sprouts to ameliorate colitis and the role of the gut microbiota in mediating any effects. We observed that despite inactivation of the plant myrosinase enzyme responsible for the generation of sulforaphane via steaming, measurable levels of sulforaphane were detectable in the colon tissue and feces of mice after ingestion of steamed broccoli sprouts. In addition, this preparation of broccoli sprouts was also capable of reducing chemically-induced colitis. This protective effect was dependent on the presence of an intact microbiota, highlighting an important role for the gut microbiota in the metabolism of cruciferous vegetables to generate bioactive metabolites and promote their anti-inflammatory effects.
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Affiliation(s)
- Tao Zhang
- School of Pharmacy, Husson University, Bangor, Maine, USA
| | - Johanna Holman
- College of Science and Humanities, Husson University, Bangor, Maine, USA
| | - Delaney McKinstry
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, Michigan, USA
| | - Bruno C Trindade
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Kathryn A Eaton
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
| | - Jonny Mendoza-Castrejon
- Postbac Research Education Program, University of Michigan, Ann Arbor, Michigan, USA; Currently at Department of Pediatrics, Washington University School of Medicine, St. Louis, Mississippi, USA
| | - Sharon Ho
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, Michigan, USA
| | - Emily Wells
- School of Pharmacy, Husson University, Bangor, Maine, USA
| | - Hebao Yuan
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, Mississippi, USA
| | - Bo Wen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, Mississippi, USA
| | - Duxin Sun
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, Mississippi, USA
| | - Grace Y Chen
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.
| | - Yanyan Li
- College of Science and Humanities, Husson University, Bangor, Maine, USA.
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8
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Yang JX, Ma N, Chen GY, Li X, Liu N, Tang RB, Jia CQ, Feng L. [Multifocal ectopic Purkinje-related premature contractions associated with SCN5A mutation: a case report]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:923-925. [PMID: 36096712 DOI: 10.3760/cma.j.cn112148-20220711-00539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- J X Yang
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - N Ma
- Department of Medical Ultrasonics, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - G Y Chen
- Department of Cardiology, Suihua First Hospital, Suihua 152001, China
| | - X Li
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - N Liu
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - R B Tang
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - C Q Jia
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - L Feng
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
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9
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Wang XY, Tian XY, Hou XH, Ning Y, Chen GY, Jin XZ. [Study on the development of public health and safety literacy assessment scale for university freshmen]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:2214-2220. [PMID: 34954989 DOI: 10.3760/cma.j.cn112338-20210315-00210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To develop a measurement scale for the public health and safety literacy of university freshmen. Methods: Item pooling was conducted through literature review and in-depth interview with public health experts, and a nominal group was organized to develop the initial items to form the questionnaire. A total of 250 freshmen were randomly selected to complete the questionnaire, and the assessment of psychometric properties were performed to carry out item reduction by using classical test theory and item response theory. Exploratory factor analysis method (EFA) was employed to calculate the item-factor loadings. The data collected from another 318 freshmen were analyzed using confirmatory factor analysis method (CFA). Results: The scale contained 3 dimensions and 9 items with all content validity index ≥0.8. The difficulty coefficient of 9 items was 1.18-2.43. The discriminative validity analysis showed that the difficulty index was 0.41-0.78, and the discrimination index was 0.38-0.64. Each of the remaining items had a statistically significant difference in the score value between the top 27% and lowest 27% of respondents (t>3, P<0.05). The item's Cronbach's α was 0.72-0.77, corrected item-total correlation was 0.33-0.60 and the overall α of the scale was 0.77. EFA indicated all item-factor loading were higher than 0.680, and the accumulated variance contribution of the 3 factors was 62.484%. Results of CFA showed that the overall fitness index of the model reached the fitness standard except for the χ2 value. There was no statistical significance in the total score of the scale and the scores of each item among groups with different demographic characteristics (P>0.05). Conclusions: The newly developed public health safety literacy scale had a good reliability,validity,stability and item constancy.It can be used in measurement of the public health and safety literacy of university freshmen.
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Affiliation(s)
- X Y Wang
- Science Popularization Department of Chinese Center for Health Education,Beijing 100011, China
| | - X Y Tian
- Division for Training and Education of Chinese Center for Health Education,Beijing 100011, China
| | - X H Hou
- Division for Training and Education of Chinese Center for Health Education,Beijing 100011, China
| | - Y Ning
- News and Propaganda Department of Chinese Center for Health Education, Beijing 100011, China
| | - G Y Chen
- Science Popularization Department of Chinese Center for Health Education,Beijing 100011, China
| | - X Z Jin
- Division of Health Communication of Chinese Center for Health Education, Beijing 100011, China
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Han K, Nam J, Xu J, Sun X, Huang X, Animasahun O, Achreja A, Jeon JH, Pursley B, Kamada N, Chen GY, Nagrath D, Moon JJ. Generation of systemic antitumour immunity via the in situ modulation of the gut microbiome by an orally administered inulin gel. Nat Biomed Eng 2021; 5:1377-1388. [PMID: 34168321 PMCID: PMC8595497 DOI: 10.1038/s41551-021-00749-2] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 05/14/2021] [Indexed: 12/12/2022]
Abstract
The performance of immune-checkpoint inhibitors, which benefit only a subset of patients and can cause serious immune-related adverse events, underscores the need for strategies that induce T-cell immunity with minimal toxicity. The gut microbiota has been implicated in the outcomes of patients following cancer immunotherapy, yet manipulating the gut microbiome to achieve systemic antitumour immunity is challenging. Here we show in multiple murine tumour models that inulin-a widely consumed dietary fibre-formulated as a 'colon-retentive' orally administered gel can effectively modulate the gut microbiome in situ, induce systemic memory-T-cell responses and amplify the antitumour activity of the checkpoint inhibitor anti-programmed cell death protein-1 (α-PD-1). Orally delivered inulin-gel treatments increased the relative abundances of key commensal microorganisms and their short-chain-fatty-acid metabolites, and led to enhanced recall responses for interferon-γ+CD8+ T cells as well as to the establishment of stem-like T-cell factor-1+PD-1+CD8+ T cells within the tumour microenvironment. Gels for the in situ modulation of the gut microbiome may be applicable more broadly to treat pathologies associated with a dysregulated gut microbiome.
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Affiliation(s)
- Kai Han
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Jutaek Nam
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Jin Xu
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Xiaoqi Sun
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Xuehui Huang
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Olamide Animasahun
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Abhinav Achreja
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Jin Heon Jeon
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Benjamin Pursley
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Nobuhiko Kamada
- Division of Gastroenterology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Grace Y Chen
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Deepak Nagrath
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, USA
| | - James J Moon
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, USA.
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA.
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA.
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, USA.
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11
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Read AJ, Waljee AK, Sussman JB, Singh H, Chen GY, Vijan S, Saini SD. Testing Practices, Interpretation, and Diagnostic Evaluation of Iron Deficiency Anemia by US Primary Care Physicians. JAMA Netw Open 2021; 4:e2127827. [PMID: 34596670 PMCID: PMC8486982 DOI: 10.1001/jamanetworkopen.2021.27827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
IMPORTANCE Recognition of iron deficiency anemia (IDA) is important to initiate timely evaluation for gastrointestinal tract cancer. Retrospective studies have reported delays in diagnostic evaluation of IDA as a common factor associated with delayed diagnosis of colorectal cancer. OBJECTIVE To assess how US primary care physicians (PCPs) approach testing for anemia, interpret iron laboratory studies, and refer patients with IDA for gastrointestinal endoscopy. DESIGN, SETTING, AND PARTICIPANTS This survey study, conducted in August 2019, included members of the American College of Physicians Internal Medicine Insiders Panel, a nationally representative group of American College of Physicians membership, who self-identified as PCPs. Participants completed a vignette-based survey to assess practices related to screening for anemia, interpretation of laboratory-based iron studies, and appropriate diagnostic evaluation of IDA. MAIN OUTCOMES AND MEASURES Descriptive statistics based on survey responses were evaluated for frequency of anemia screening, correct interpretation of iron laboratory studies, and proportion of patients with new-onset IDA referred for gastrointestinal tract evaluation. RESULTS Of 631 PCPs who received an invitation to participate in the survey, 356 (56.4%) responded and 31 (4.9%) were excluded, for an adjusted eligible sample size of 600, yielding 325 completed surveys (response rate, 54.2%). Of the 325 participants who completed surveys, 180 (55.4%) were men; age of participants was not assessed. The mean (SD) duration of clinical experience was 19.8 (11.2) years (range, 1.0-45.0 years). A total of 250 participants (76.9%) screened at least some patients for anemia. Interpretation of iron studies was least accurate in a scenario of a borderline low ferritin level (40 ng/mL) with low transferrin saturation (2%); 86 participants (26.5%) incorrectly responded that this scenario did not indicate IDA, and 239 (73.5%) correctly identified this scenario as IDA. Of 312 participants, 170 (54.5%) recommended bidirectional endoscopy (upper endoscopy and colonoscopy) for new IDA for women aged 65 years; of 305 respondents, 168 (55.1%) recommended bidirectional endoscopy for men aged 65 years. CONCLUSIONS AND RELEVANCE In this survey study, US PCPs' self-reported testing practices for anemia suggest overuse of screening laboratory tests, misinterpretation of iron studies, and underuse of bidirectional endoscopy for evaluation of new-onset IDA. Both misinterpretation of iron studies and underuse of bidirectional endoscopy can lead to delayed diagnosis of gastrointestinal tract cancers and warrant additional interventions.
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Affiliation(s)
- Andrew J. Read
- Department of Internal Medicine, University of Michigan, Ann Arbor
- Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor
| | - Akbar K. Waljee
- Department of Internal Medicine, University of Michigan, Ann Arbor
- Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor
- Veterans Affairs Health Services Research and Development, Center for Clinical Management Research, Ann Arbor, Michigan
| | - Jeremy B. Sussman
- Department of Internal Medicine, University of Michigan, Ann Arbor
- Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor
- Veterans Affairs Health Services Research and Development, Center for Clinical Management Research, Ann Arbor, Michigan
| | - Hardeep Singh
- Center for Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey Veterans Affairs Medical Center and Baylor College of Medicine, Houston, Texas
| | - Grace Y. Chen
- Department of Internal Medicine, University of Michigan, Ann Arbor
| | - Sandeep Vijan
- Department of Internal Medicine, University of Michigan, Ann Arbor
- Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor
- Veterans Affairs Health Services Research and Development, Center for Clinical Management Research, Ann Arbor, Michigan
| | - Sameer D. Saini
- Department of Internal Medicine, University of Michigan, Ann Arbor
- Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor
- Veterans Affairs Health Services Research and Development, Center for Clinical Management Research, Ann Arbor, Michigan
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12
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Wei XJ, Zhang YN, Cheng M, Su CL, Zhang PP, Gu WR, Chen GY. [Adrenocortical oncocytic tumors: a clinicopathological analysis of 44 cases]. Zhonghua Bing Li Xue Za Zhi 2021; 50:500-504. [PMID: 33915658 DOI: 10.3760/cma.j.cn112151-20210209-00142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the clinicopathological features of adrenocortical oncocytic tumors (ACOT) and to compare the diagnostic values of Lin-Weiss-Bisceglia (LWB) score and Helsinki score. Methods: Forty-four cases of ACOT diagnosed at Beijing Friendship Hospital, China from March 2008 to July 2019 were histologically analyzed to evaluate their malignant potential (benign versus malignant) according to two scoring criteria. Immunohistochemical studies (EnVision method) were also used. Results: There were 23 males and 21 females with an average age of 46 years. Histologically, the tumor cells were arranged in trabecular, chrysanthemum-shaped, glandular and microcapsule structures, while clear cells were rare or absent. Most of the tumor cells were moderately atypical, and intranuclear inclusion bodies were conspicuous. Immunohistochemical staining showed that tumor cells were positive for Melan A, inhibin, Syn and calretinin. The average proliferation index was 3% in benign ACOT, about 5% in ACOT of malignant potential, and>20% in malignant ACOT. According to the LWB score, 61.4% (27/44) of the tumors were on the left side and had multiple lesions. The percentage of benign ACOT was 59.1% (26/44), malignant potential 6.8% (3/44), malignant 34.1% (15/44), respectively. Among the 15 malignant ACOT, the mitotic figures>5/50 HPF were found in 13 cases, necrosis in 11 cases and capsule invasion in 10 cases. According to the Helsinki score, 65.9% (29/44) of the tumors were benign, and 34.1% (15/44) were malignant. There was no significant difference between the two scoring standards (P>0.05). During the follow-up of 9 to 144 months, 31 patients survived without disease and 13 patients relapsed or had metastasis. Conclusions: ACOT more likely be benign than malignant. The left side is more common. Malignant tumors are prone to recurrence and metastasis. The morphological parameters (high mitotic index, necrosis, and capsular invasion) in the LWB scoring standards combined with immunohistochemical parameters (Ki-67) in the Helsinki score are helpful for the diagnosis of malignant ACOT and are important predictors of poor prognosis.
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Affiliation(s)
- X J Wei
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050,China
| | - Y N Zhang
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050,China
| | - M Cheng
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050,China
| | - C L Su
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050,China
| | - P P Zhang
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050,China
| | - W R Gu
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050,China
| | - G Y Chen
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050,China
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13
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Zhang XB, Fei YX, He T, Gao L, Zhang YT, Gao YD, Li G, Wang J, Ru QJ, Wang HQ, Chen GY. [Correlation analysis between serum ferritin level and liver damage in acute stage of dengue fever]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:265-270. [PMID: 33902195 DOI: 10.3760/cma.j.cn501113-20191204-00444] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the correlation between serum ferritin (SF) level and liver damage in the acute stage of dengue fever. Methods: A retrospective study was conducted to analyze 171 cases diagnosed with dengue fever as dengue fever group and 130 healthy patients as control group in Hangzhou 3A grade hospital from July to December 2017. Clinical data, SF and liver function related indicators were collected from both groups: alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin (TBIL) to analyze the correlation between liver damage and SF in patients with dengue fever. Results: ALT, AST, and SF levels were significantly higher in the dengue fever group than those in the healthy control group (Z = 11.553, 15.054 and 15.163, P < 0.001). SF levels were higher in the dengue fever combined with liver damage group than those without the liver damage group (z = 6.930, P < 0.001). However, there was no statistically significant differences in age, gender, peak body temperature, and history of liver disease (P > 0.05). In addition, Spearman's correlation analysis showed that SF was positively correlated with ALT, AST, and TBIL (r = 0.464, 0.531 and 0.315, P < 0.001). Among dengue patients with different SF levels, there were significant difference in ALT, AST levels and incidence of liver damage (H = 14.240 and 17.584, χ(2) = 49.547, P < 0.001). Patients with higher SF levels had higher ALT, AST levels and incidence of liver damage. Binary logistic regression analysis showed that hyperferritinemia (SF≥500 ng/ml) was the risk factor for dengue fever combined with liver damage (OR = 8.120, P < 0.001). Furthermore, ROC curve analysis showed that the AUC for SF to judge dengue fever combined liver damage was 0.846 (95% CI: 0.785-0.908), and the sensitivity and specificity when the SF cut-off value was 1 506 ng/ml were 74.8% and 83.3%. Conclusion: There is a certain correlation between the SF level and the degree of liver damage in acute stage of dengue fever patients, and hyperferritinemia is a risk factor for dengue fever combined with liver damage.
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Affiliation(s)
- X B Zhang
- The Affiliated Hospital of Hangzhou Normal University, Hangzhou 310018, China
| | - Y X Fei
- Zhejiang Chinese Medical University, Hangzhou 310051, China
| | - T He
- Hangzhou Nomal University, Hangzhou 311100, China
| | - L Gao
- The Affiliated Hospital of Hangzhou Normal University, Hangzhou 310018, China
| | - Y T Zhang
- Zhejiang Chinese Medical University, Hangzhou 310051, China
| | - Y D Gao
- The Affiliated Hospital of Hangzhou Normal University, Hangzhou 310018, China
| | - G Li
- The Affiliated Hospital of Hangzhou Normal University, Hangzhou 310018, China
| | - J Wang
- The Affiliated Hospital of Hangzhou Normal University, Hangzhou 310018, China
| | - Q J Ru
- The second Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou 310018, China
| | - H Q Wang
- Hangzhou Genter For Disease Control And Prevention, Hangzhou 310021, China
| | - G Y Chen
- The Affiliated Hospital of Hangzhou Normal University, Hangzhou 310018, China
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14
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Chen GY, Li ZX, Chen YH, Zhang XD. Highly efficient polarization-entangled photon-pair generation in lithium niobate waveguides based on bound states in continuum. Opt Express 2021; 29:12110-12123. [PMID: 33984977 DOI: 10.1364/oe.420792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
Integrated optics provides a platform for the experimental implementation of highly complex and compact circuits for practical applications as well as for advances in the fundamental science of quantum optics. The lithium niobate (LN) waveguide is an important candidate for the construction of integrated optical circuits. Based on the bound state in the continuum (BIC) in a LN waveguide, we propose an efficient way to produce polarization-entangled photon pairs. The implementation of this method is simple and does not require the polarization process needed for periodically poled LN. The generation rate of the entangled photon pairs increases linearly with the length of the waveguide. For visible light, the generation efficiency can be improved by more than five orders of magnitude with waveguides having the length of only a few millimeters, compared with the corresponding case without BICs. The phenomena can appear in a very wide spectrum range from the visible to THz regions. This study is of great significance for the development of active integrated quantum chips in various wavelength ranges.
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15
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Lo BC, Chen GY, Núñez G, Caruso R. Gut microbiota and systemic immunity in health and disease. Int Immunol 2020; 33:197-209. [PMID: 33367688 DOI: 10.1093/intimm/dxaa079] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 12/17/2020] [Indexed: 12/11/2022] Open
Abstract
The mammalian intestine is colonized by trillions of microorganisms that have co-evolved with the host in a symbiotic relationship. Although the influence of the gut microbiota on intestinal physiology and immunity is well known, mounting evidence suggests a key role for intestinal symbionts in controlling immune cell responses and development outside the gut. Although the underlying mechanisms by which the gut symbionts influence systemic immune responses remain poorly understood, there is evidence for both direct and indirect effects. In addition, the gut microbiota can contribute to immune responses associated with diseases outside the intestine. Understanding the complex interactions between the gut microbiota and the host is thus of fundamental importance to understand both immunity and human health.
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Affiliation(s)
- Bernard C Lo
- Department of Pathology and Rogel Cancer Center, Ann Arbor, MI, USA
| | - Grace Y Chen
- Department of Internal Medicine, the University of Michigan Medical School, Ann Arbor, MI, USA
| | - Gabriel Núñez
- Department of Pathology and Rogel Cancer Center, Ann Arbor, MI, USA
| | - Roberta Caruso
- Department of Pathology and Rogel Cancer Center, Ann Arbor, MI, USA
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16
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Follmer AH, Ribson RD, Oyala PH, Chen GY, Hadt RG. Understanding Covalent versus Spin-Orbit Coupling Contributions to Temperature-Dependent Electron Spin Relaxation in Cupric and Vanadyl Phthalocyanines. J Phys Chem A 2020; 124:9252-9260. [PMID: 33112149 DOI: 10.1021/acs.jpca.0c07860] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Recent interest in transition-metal complexes as potential quantum bits (qubits) has reinvigorated the investigation of fundamental contributions to electron spin relaxation in various ligand scaffolds. From quantum computers to chemical and biological sensors, interest in leveraging the quantum properties of these molecules has opened a discussion of the requirements to maintain coherence over a large temperature range, including near room temperature. Here we compare temperature-, magnetic field position-, and concentration-dependent electron spin relaxation in copper(II) phthalocyanine (CuPc) and vanadyl phthalocyanine (VOPc) doped into diamagnetic hosts. While VOPc demonstrates coherence up to room temperature, CuPc coherence times become rapidly T1-limited with increasing temperature, despite featuring a more covalent ground-state wave function than VOPc. As rationalized by a ligand field model, this difference is ascribed to different spin-orbit coupling (SOC) constants for Cu(II) versus V(IV). The manifestation of SOC contributions to spin-phonon coupling and electron spin relaxation in different ligand fields is discussed, allowing for a further understanding of the competing roles of SOC and covalency in electron spin relaxation.
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Affiliation(s)
- Alec H Follmer
- Division of Chemistry and Chemical Engineering, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125, United States
| | - Ryan D Ribson
- Division of Chemistry and Chemical Engineering, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125, United States
| | - Paul H Oyala
- Division of Chemistry and Chemical Engineering, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125, United States
| | - Grace Y Chen
- Division of Chemistry and Chemical Engineering, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125, United States
| | - Ryan G Hadt
- Division of Chemistry and Chemical Engineering, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125, United States
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17
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Trindade BC, Chen GY. NOD1 and NOD2 in inflammatory and infectious diseases. Immunol Rev 2020; 297:139-161. [PMID: 32677123 DOI: 10.1111/imr.12902] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 12/12/2022]
Abstract
It has been long recognized that NOD1 and NOD2 are critical players in the host immune response, primarily by their sensing bacterial peptidoglycan-conserved motifs. Significant advances have been made from efforts that characterize their upstream activators, assembly of signaling complexes, and activation of downstream signaling pathways. Disruption in NOD1 and NOD2 signaling has also been associated with impaired host defense and resistance to the development of inflammatory diseases. In this review, we will describe how NOD1 and NOD2 sense microbes and cellular stress to regulate host responses that can affect disease pathogenesis and outcomes.
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Affiliation(s)
- Bruno C Trindade
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Grace Y Chen
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
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18
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He T, Zhang XB, Fei YX, Gao L, Gong L, Zhang QL, Chen GY. [Anti-PD-1 therapy in advanced malignant liver tumor-induced type-1 diabetes mellitus: a case report]. Zhonghua Gan Zang Bing Za Zhi 2020; 28:518-520. [PMID: 32660183 DOI: 10.3760/cma.j.cn501113-20191124-00430] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Immune checkpoint inhibitor (ICI) has been emerged as a major breakthrough in tumor immunotherapy, but its unique mechanism of action has also led to a number of immune-related adverse events (irAE). Type 1 diabetes mellitus (T1DM) is one of the rarest irAEs. This paper reports a case of advanced malignant liver tumor-induced T1DM who received second-line anti-PD-1 therapy and showed initial symptoms of hyperosmolar coma and hyperglycemia. In addition, the relevant literature at home and abroad was collected and reviewed, and the clinical characteristics of T1DM induced by anti-PD-1 therapy were summarized with a view to achieve early detection, diagnosis and treatment.
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Affiliation(s)
- T He
- Hangzhou Nomal University, Hangzhou 310011, China
| | - X B Zhang
- Hangzhou Nomal University, Hangzhou 310011, China
| | - Y X Fei
- Zhejiang University of Traditional Chinese Medicine, Hangzhou 310011, China
| | - L Gao
- Affiliated Hospital of Hangzhou Normal University, Hangzhou 310011, China
| | - L Gong
- Affiliated Hospital of Hangzhou Normal University, Hangzhou 310011, China
| | - Q L Zhang
- Affiliated Hospital of Hangzhou Normal University, Hangzhou 310011, China
| | - G Y Chen
- Affiliated Hospital of Hangzhou Normal University, Hangzhou 310011, China
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19
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Yu AI, Zhao L, Eaton KA, Ho S, Chen J, Poe S, Becker J, Gonzalez A, McKinstry D, Hasso M, Mendoza-Castrejon J, Whitfield J, Koumpouras C, Schloss PD, Martens EC, Chen GY. Gut Microbiota Modulate CD8 T Cell Responses to Influence Colitis-Associated Tumorigenesis. Cell Rep 2020; 31:107471. [PMID: 32268087 PMCID: PMC7934571 DOI: 10.1016/j.celrep.2020.03.035] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [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: 08/19/2019] [Revised: 02/13/2020] [Accepted: 03/12/2020] [Indexed: 02/07/2023] Open
Abstract
There is increasing evidence that gut microbiome perturbations, also known as dysbiosis, can influence colorectal cancer development. To understand the mechanisms by which the gut microbiome modulates cancer susceptibility, we examine two wild-type mouse colonies with distinct gut microbial communities that develop significantly different tumor numbers using a mouse model of inflammation-associated tumorigenesis. We demonstrate that adaptive immune cells contribute to the different tumor susceptibilities associated with the two microbial communities. Mice that develop more tumors have increased colon lamina propria CD8+ IFNγ+ T cells before tumorigenesis but reduced CD8+ IFNγ+ T cells in tumors and adjacent tissues compared with mice that develop fewer tumors. Notably, intratumoral T cells in mice that develop more tumors exhibit increased exhaustion. Thus, these studies suggest that microbial dysbiosis can contribute to colon tumor susceptibility by hyperstimulating CD8 T cells to promote chronic inflammation and early T cell exhaustion, which can reduce anti-tumor immunity.
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Affiliation(s)
- Amy I Yu
- Graduate Program in Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Lili Zhao
- Department of Biostatistics, University of Michigan, University of Michigan, Ann Arbor, MI 48109, USA
| | - Kathryn A Eaton
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Sharon Ho
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jiachen Chen
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Sara Poe
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - James Becker
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Allison Gonzalez
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, MI 48109, USA
| | - Delaney McKinstry
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, MI 48109, USA
| | - Muneer Hasso
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, MI 48109, USA
| | | | - Joel Whitfield
- Cancer Center Immunology Core, University of Michigan, Ann Arbor, MI 48109, USA
| | - Charles Koumpouras
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Patrick D Schloss
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Eric C Martens
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Grace Y Chen
- Graduate Program in Immunology, University of Michigan, Ann Arbor, MI 48109, USA; Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA.
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20
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Chen GY, Zhang WX, Zhang XD. Strong terahertz magneto-optical phenomena based on quasi-bound states in the continuum and Fano resonances. Opt Express 2019; 27:16449-16460. [PMID: 31252870 DOI: 10.1364/oe.27.016449] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
We propose new ways to produce strong terahertz (THz) magneto-optical phenomena from monolayer graphene based on bound states in the continuum (BICs) and Fano resonances. The BICs and Fano resonances of radiation modes in the monolayer graphene are realized by designing the photonic crystal slab-graphene-slab structure. Based on them, the magnetic circular dichroism near 100% has been achieved. Importantly, such magneto-optical phenomena can be modulated in intensity and frequency using only electrostatic doping at a fixed magnetic field. Comparing two ways to produce magneto-optical phenomena, it is found that the way based on BICs exhibits some advantages such as good electrical tenability due to narrower resonance width, higher conversion efficiency and more stability with the change of incident angle. These phenomena can appear in a broad THz range by designing the nanostructures, which are very beneficial to polarization conversion and optoelectronic devices.
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Zhou DX, Ma YJ, Chen GY, Gao X, Yang L. [Relationship of TLR2 and TLR4 expressions on the surface of peripheral blood mononuclear cells to small intestinal bacteria overgrowth in patients with hepatocellular carcinoma]. Zhonghua Gan Zang Bing Za Zhi 2019; 27:286-290. [PMID: 31082340 DOI: 10.3760/cma.j.issn.1007-3418.2019.04.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate TLR2 and TLR4 expressional situation on the surface of peripheral blood mononuclear cells (PBMC) in patients with hepatocellular carcinoma (HCC) and their relationship with small intestinal bacterial overgrowth (SIBO). Methods: Flow cytometry was used to detect TLR2 and TLR4 expressional situation on the surface of PBMC in 78 cases with HCC, 56 cases with cirrhosis and 33 healthy controls. Furthermore, lactose hydrogen breath test (LHBT) was used to detect small intestinal bacterial overgrowth. Results: Of the 78 cases with HCC, 56 cases (71.8%) were SIBO-positive, 23 cases (41.1%) were SIBO- positive in 56 cases with cirrhosis, and 1 (3.0%) was SIBO-positive in 33 healthy controls. The incidence of SIBO in HCC patients was higher than cirrhosis patients (χ(2) = 12.72, P < 0.05) and healthy controls (χ(2) = 41.18, P < 0.05). The expression levels of TLR2 and TLR4 in HCC patients (100.55 ± 24.22, 42.76 ± 15.96) were significantly higher than cirrhosis (67.42 ± 18.36, 24.38 ± 8.68)and healthy control group (33.06 ± 11.72, 12.52 ± 4.46) (P < 0.05). Furthermore, the expression levels of TLR2 and TLR4 in SIBO-positive patients (108.75 ± 20.40, 48.1 ± 14.98) were higher than SIBO-negative patients (79.67 ± 20.60, 28.62 ± 7.36) (P < 0.05). Conclusion: The expression of TLR2 and TLR4 and the incidence of SIBO in HCC patients are significantly higher than cirrhosis and healthy control group. Moreover, the high expressions of TLR2 and TLR4 in SIBO-positive HCC patients may promote the development of HCC.
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Affiliation(s)
- D X Zhou
- Department of Gastroenterology, Digestive Disease Institute, People's Hospital, Zhengzhou 450002, China
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22
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Jiang YH, Jiao Y, Chen GY, Sheng JH, Xu QX. [Parotid mucoepidermoid carcinoma after treatment for acute lymphoblastic leukemia in children]. Zhonghua Er Ke Za Zhi 2019; 57:483-484. [PMID: 31216808 DOI: 10.3760/cma.j.issn.0578-1310.2019.06.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Y H Jiang
- Clinical Laboratory, the Tumor Hospital of Zhengzhou University, Zhengzhou 450008, China
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Yu AIW, Ho S, Chen J, Koumpouras C, Zhao L, Schloss PD, Eaton KA, Chen GY. The gut microbiome can contribute to colon tumor susceptibility via an effect on CD8+ T cell responses. The Journal of Immunology 2019. [DOI: 10.4049/jimmunol.202.supp.191.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
There is increasing evidence that colorectal cancer patients have altered gut microbiomes compared to healthy controls, but the mechanisms by which the microbiota contribute to colon carcinogenesis remain to be fully elucidated. Using the azoxymethane (AOM)/dextran sulfate sodium (DSS) mouse model of inflammation-associated colon tumorigenesis, our lab discovered two colonies of specific pathogen free (SPF) C57BL/6J wild type (WT) mice housed in the same mouse room that develop differential tumor burdens. Mice from the “WT1” colony developed five tumors on average while mice from the “WT2” colony developed 15 tumors on average. The increased tumor susceptibility in WT2 mice can be directly attributed to the gut microbiome as germ-free (GF) mice colonized with WT2 bacteria developed more tumors compared to that of GF mice colonized with WT1 bacteria. Additionally, 16S rRNA gene sequencing of fecal bacteria from WT1 and WT2 mice revealed distinct microbiomes with certain bacteria consistently associated with high or low tumor numbers. Furthermore, naïve and acutely-inflamed (day 10 of AOM/DSS) WT2 mice have increased colon lamina propria CD8+ IFNγ+ T cells compared to WT1 mice as measured by flow cytometry. However, in tumor-bearing WT2 mice, there was decreased tumor-infiltrating CD8+ T cells with reduced IFNγ production, possibly due to T cell exhaustion. GF Rag1−/− mice as well as SPF CD8−/− mice inoculated with WT2 gut microbiota developed fewer tumors than SPF WT2 mice, suggesting that the WT2 gut microbiome increases tumor susceptibility, in part, through an effect on CD8+ T cells. Altogether, our data reveal a potential novel role of microbiota in altering colon CD8+ T cell function that ultimately impacts colon cancer risk.
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Wu J, An M, Zhu J, Tan Z, Chen GY, Stidham RW, Lubman DM. A Method for Isolation and Proteomic Analysis of Outer Membrane Vesicles from Fecal Samples by LC-MS/MS. ACTA ACUST UNITED AC 2019; 12:38-42. [PMID: 31057293 PMCID: PMC6497448 DOI: 10.4172/0974-276x.1000494] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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] [Indexed: 01/23/2023]
Abstract
Outer membrane vesicles (OMVs) are nanosized spheres secreted by bacteria that are similar to the vesicles known as exosomes, which are secreted by most mammalian cell types. In contrast to many studies focusing on optimizing methods for enriching exosomes from biological fluid, few studies have been conducted to investigate outer membrane vesicles from fecal samples. Herein, we have developed a pipeline comprised of membrane filtration and multiple cycles of ultracentrifugation (UC) to isolate OMVs from fecal samples for proteomics analysis, where multiple cycles of UC are required for removal of contaminants. By iTRAQ labeling quantitative proteomics analysis, different filter sizes (0.22 μm and 0.45 μm) were compared in terms of their performance in enriching OMVs and eliminating background fecal material. Using the 0.45 μm filter, a slightly higher protein yield was obtained but no additional contaminating proteins from bacteria were identified compared to those from the 0.22 μm filter. The 0.45 μm filter together with the multiple cycles of UC were thus used to isolate OMVs for proteomics analysis. To our knowledge, this is the first study profiling a large number of OMV proteins from fecal samples. Such capabilities may help provide valuable information in understanding the communication between the host and microbiota, which is critical in preventing cancer and disease development
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Affiliation(s)
- Jing Wu
- Department of Surgery, University of Michigan Medical Center, Ann Arbor, Michigan 48109, USA
| | - Mingrui An
- Department of Surgery, University of Michigan Medical Center, Ann Arbor, Michigan 48109, USA
| | - Jianhui Zhu
- Department of Surgery, University of Michigan Medical Center, Ann Arbor, Michigan 48109, USA
| | - Zhijing Tan
- Department of Surgery, University of Michigan Medical Center, Ann Arbor, Michigan 48109, USA
| | - Grace Y Chen
- Department of Internal Medicine, Division of Hematology/Oncology University of Michigan, Ann Arbor, MI 48109, USA
| | - Ryan W Stidham
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, University of Michigan, Ann Arbor, MI, 48109, USA.,Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | - David M Lubman
- Department of Surgery, University of Michigan Medical Center, Ann Arbor, Michigan 48109, USA
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Wang L, Sun LY, Huang J, Chen GY, Zhao XY. [A clinicopathological analysis of 21 cases of hepatolenticular degeneration]. Zhonghua Gan Zang Bing Za Zhi 2018; 26:903-908. [PMID: 30669782 DOI: 10.3760/cma.j.issn.1007-3418.2018.12.006] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To improve the diagnostic quality of hepatolenticular degeneration by summarizing the clinicopathological features. Methods: A retrospective analysis of 21 cases that were diagnosed as hepatolenticular degeneration with liver biopsy in our hospital from January 2013 to August 2018 was reviewed, and then their clinicopathologic features were analyzed. The pathomorphological differences between liver biopsy and liver biopsy after transplantation, and the relationship between histopathological patterns and biopsy types and clinical indicators were analyzed by Fisher's exact test. Results: Of the 21 patients with hepatolenticular degeneration, 10 patients had liver biopsy, and 11 patients underwent liver biopsy after liver transplantation. Among them, four cases were presented as simple fatty liver pattern (19.0%, 4/21), eight cases as steatohepatitis pattern (38.1%, 8/21), four cases as inflammatory necrosis without cirrhosis pattern (19.0%, 4/21), and five cases as inflammatory necrosis with cirrhosis pattern (23.9%, 5/21). Twelve cases had copper deposition in the liver (57.1%, 12/21), and the pattern of copper distribution in the liver was uneven. Conclusion: A clinicalpathological features of hepatolenticular degeneration mainly manifests in four patterns, but lack characteristic changes. Hence, comprehensive judgment should rely on clinical history, laboratory examination, genetic test results and liver histopathological changes.
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Affiliation(s)
- L Wang
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - L Y Sun
- Liver Transplantation Center Capital Medical University, Beijing 100050, China
| | - J Huang
- Experimental Research Center, Capital Medical University, Beijing 100050, China
| | - G Y Chen
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - X Y Zhao
- Liver Research Center, National Clinical Research Center for Digestive Diseases
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Hara H, Seregin SS, Yang D, Fukase K, Chamaillard M, Alnemri ES, Inohara N, Chen GY, Núñez G. The NLRP6 Inflammasome Recognizes Lipoteichoic Acid and Regulates Gram-Positive Pathogen Infection. Cell 2018; 175:1651-1664.e14. [PMID: 30392956 DOI: 10.1016/j.cell.2018.09.047] [Citation(s) in RCA: 157] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 03/26/2018] [Accepted: 09/21/2018] [Indexed: 02/08/2023]
Abstract
The activator and composition of the NLRP6 inflammasome remain poorly understood. We find that lipoteichoic acid (LTA), a molecule produced by Gram-positive bacteria, binds and activates NLRP6. In response to cytosolic LTA or infection with Listeria monocytogenes, NLRP6 recruited caspase-11 and caspase-1 via the adaptor ASC. NLRP6 activation by LTA induced processing of caspase-11, which promoted caspase-1 activation and interleukin-1β (IL-1β)/IL-18 maturation in macrophages. Nlrp6-/- and Casp11-/- mice were less susceptible to L. monocytogenes infection, which was associated with reduced pathogen loads and impaired IL-18 production. Administration of IL-18 to Nlrp6-/- or Casp11-/- mice restored the susceptibility of mutant mice to L. monocytogenes infection. These results reveal a previously unrecognized innate immunity pathway triggered by cytosolic LTA that is sensed by NLRP6 and exacerbates systemic Gram-positive pathogen infection via the production of IL-18.
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Affiliation(s)
- Hideki Hara
- Department of Pathology and Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
| | - Sergey S Seregin
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Dahai Yang
- Department of Pathology and Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Koichi Fukase
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Mathias Chamaillard
- CIIL-Centre d'Infection et d'Immunité de Lille, Université de Lille, CNRS, Inserm, CHRU Lille, Institut Pasteur de Lille, U1019-UMR 8204, F-59000, Lille, France
| | - Emad S Alnemri
- Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Naohiro Inohara
- Department of Pathology and Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Grace Y Chen
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Gabriel Núñez
- Department of Pathology and Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
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Abstract
There is increasing evidence that the gut microbiome, which consists of trillions of microbes representing over 1,000 species of bacteria with over 3 million genes, significantly impacts intestinal health and disease. The gut microbiota not only is capable of promoting intestinal homeostasis and antitumor responses but can also contribute to chronic dysregulated inflammation as well as have genotoxic effects that lead to carcinogenesis. Whether the gut microbiota maintains health or promotes colon cancer may ultimately depend on the composition of the gut microbiome and the balance within the microbial community of protective and detrimental bacterial populations. Disturbances in the normal balanced state of a healthful microbiome, known as dysbiosis, have been observed in patients with colorectal cancer (CRC); however, whether these alterations precede and cause CRC remains to be determined. Nonetheless, studies in mice strongly suggest that the gut microbiota can modulate susceptibility to CRC, and therefore may serve as both biomarkers and therapeutic targets.
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Affiliation(s)
- Grace Y. Chen
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
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28
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Liu YH, Guo PF, Chen GY, Bo YC, Ma Y, Cui ZJ. [Advances in the research of effects of glutamine on immune function of burn patients]. Zhonghua Shao Shang Za Zhi 2018; 34:249-253. [PMID: 29690745 DOI: 10.3760/cma.j.issn.1009-2587.2018.04.012] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Glutamine is the most abundant amino acid found in plasma and cells. It is the preferred fuel for enterocytes in the small intestine, macrophages, and lymphocytes. After serious burn, increased requirement of glutamine by the gastrointestinal tract, kidney and lymphocytes, and relatively insufficient self synthesis likely contribute to the rapid decline of glutamine in circulation and cells. Glutamine supplementation can not only protect intestinal mucosa, maintain normal intestinal barrier function, reduce bacterial translocation, and enhance the intestinal immune function, but also increase the number of lymphocytes, enhance the phagocytic function of macrophage, promote the synthesis of immunoglobulin, and reduce the body's inflammatory response, so as to enhance the immune function. Therefore, glutamine supplementation can improve and enhance the immune function, reduce complications and promote the prognosis of severely burned patients.
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Affiliation(s)
- Y H Liu
- Department of Nutrition, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
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29
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Shi YK, Wang L, Han BH, Li W, Yu P, Liu YP, Ding CM, Song X, Ma ZY, Ren XL, Feng JF, Zhang HL, Chen GY, Han XH, Wu N, Yao C, Song Y, Zhang SC, Song W, Liu XQ, Zhao SJ, Lin YC, Ye XQ, Li K, Shu YQ, Ding LM, Tan FL, Sun Y. First-line icotinib versus cisplatin/pemetrexed plus pemetrexed maintenance therapy for patients with advanced EGFR mutation-positive lung adenocarcinoma (CONVINCE): a phase 3, open-label, randomized study. Ann Oncol 2017; 28:2443-2450. [PMID: 28945850 DOI: 10.1093/annonc/mdx359] [Citation(s) in RCA: 181] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Icotinib has been previously shown to be non-inferior to gefitinib in non-selected advanced non-small-cell lung cancer patients when given as second- or further-line treatment. In this open-label, randomized, phase 3 CONVINCE trial, we assessed the efficacy and safety of first-line icotinib versus cisplatin/pemetrexed plus pemetrexed maintenance in lung adenocarcinoma patients with epidermal growth factor receptor (EGFR) mutation. PATIENTS AND METHODS Eligible participants were adults with stage IIIB/IV lung adenocarcinoma and exon 19/21 EGFR mutations. Participants were randomly allocated (1 : 1) to receive oral icotinib or 3-week cycle of cisplatin plus pemetrexed for up to four cycles; non-progressive patients after four cycles were maintained with pemetrexed until disease progression or intolerable toxicity. The primary end point was progression-free survival (PFS) assessed by independent response evaluation committee. Other end points included overall survival (OS) and safety. RESULTS Between January 2013 and August 2014, 296 patients were randomized, and 285 patients were treated (148 to icotinib, 137 to chemotherapy). Independent response evaluation committee-assessed PFS was significantly longer in the icotinib group (11.2 versus 7.9 months; hazard ratio, 0.61, 95% confidence interval 0.43-0.87; P = 0.006). No significant difference for OS was observed between treatments in the overall population or in EGFR-mutated subgroups (exon 19 Del/21 L858R). The most common grade 3 or 4 adverse events (AEs) in the icotinib group were rash (14.8%) and diarrhea (7.4%), compared with nausea (45.9%), vomiting (29.2%), and neutropenia (10.9%) in the chemotherapy group. AEs (79.1% versus 94.2%; P < 0.001) and treatment-related AEs (54.1% versus 90.5%; P < 0.001) were significantly fewer in the icotinib group than in the chemotherapy group. CONCLUSIONS First-line icotinib significantly improves PFS of advanced lung adenocarcinoma patients with EGFR mutation with a tolerable and manageable safety profile. Icotinib should be considered as a first-line treatment for this patient population.
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Affiliation(s)
- Y K Shi
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing.
| | - L Wang
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing
| | - B H Han
- Department of Pulmonology, Shanghai Chest Hospital, Shanghai
| | - W Li
- Department of Oncology, The First Hospital Affiliated to Jilin University, Changchun
| | - P Yu
- Department of Lung Cancer Medical Oncology, Sichuan Cancer Hospital, Chengdu
| | - Y P Liu
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang
| | - C M Ding
- Department of Respiratory Medicine, The Fourth Hospital of Hebei Medical University, Shijiazhuang
| | - X Song
- Department of Respiratory Medicine, Shanxi Provincial Tumor Hospital, Taiyuan
| | - Z Y Ma
- Department of Oncology, Henan Cancer Hospital, Zhengzhou
| | - X L Ren
- Department of Respiratory Medicine, Xijing Hospital, The Fourth Military Medical University, Xi'an
| | - J F Feng
- Department of Oncology, Jiangsu Cancer Hospital, Nanjing
| | - H L Zhang
- Department of Oncology, Tangdu Hospital, The Fourth Military Medical University, Xi'an
| | - G Y Chen
- Department of Medical Oncology, The Affiliated Tumor Hospital of Harbin Medical University, Harbin
| | - X H Han
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing
| | - N Wu
- Department of Imaging Diagnosis, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing
| | - C Yao
- Department of Biostatistics, Peking University Clinical Research Institute, Beijing
| | - Y Song
- Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing
| | - S C Zhang
- Department of Medical Oncology, Beijing Chest Hospital, Capital Medical University, Beijing
| | - W Song
- Department of Radiology, Peking Union Medical College Hospital, Beijing
| | - X Q Liu
- Department of Pulmonary Oncology, The 307th Hospital of Chinese People's Liberation Army, Beijing
| | - S J Zhao
- Department of Imaging Diagnosis, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing
| | - Y C Lin
- Department of Medical Oncology, Cancer Hospital of Shantou University Medical College, Shantou
| | - X Q Ye
- Department of Respiratory Diseases, The Second Affiliated Hospital of Nanchang University, Nanchang
| | - K Li
- Department of Thoracic Oncology, Tianjin Medical University Cancer Institute and Hospital, Tianjin
| | - Y Q Shu
- Department of Oncology, Jiangsu Provincial Hospital, Nanjing
| | - L M Ding
- Betta Pharmaceuticals Co., Ltd, Hangzhou, China
| | - F L Tan
- Betta Pharmaceuticals Co., Ltd, Hangzhou, China
| | - Y Sun
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing
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Zeng J, Sun WL, Chen GY, Pan Q, Yan SY, Sun C, Xu ZJ, Fan JG. [Efficiency of FibroScan and FibroTouch in liver stiffness measurement and fat quantification: a comparative analysis]. Zhonghua Gan Zang Bing Za Zhi 2017; 24:652-658. [PMID: 27788720 DOI: 10.3760/cma.j.issn.1007-3418.2016.09.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Objective: To investigate the efficiency of FibroScan(FS)and FibroTouch(FT)in liver stiffness measurement(LSM)and fat quantification through a comparative analysis. Methods: The outpatients or hospitalized patients who underwent LSM and fat quantification using FS and FT were enrolled. The differences in success rate and detecting parameters between FS and FT were analyzed, as well as the correlation between FS and FT values. The t-test was used for comparison of normally distributed continuous data between groups, and a one-way analysis of variance or the Kruskal-Wallis test was used for comparison between multiple groups. The Mann-Whitney U test was used for comparison of non-normally distributed continuous data between groups. Results: A total of 1621 patients were enrolled. The success rates of FT and FS were 100% and 94.96%, respectively, and the success rate of FS was influenced by sex, age, body mass index, and biochemical markers of liver function. FT has a significantly shorter duration of single detection and a significantly lower number of times of single detection than FS(duration of single detection: 190.21±38.78 s vs 220.89±68.36 s, P < 0.01; number of single detection times: 10.31±1.32 vs 11.81±3.76, P < 0.01), as well as a significantly lower ratio of interquartile range to median of fat quantification in the same patient(5.39%±4.81% vs 17.18%±14.07%, P < 0.01). The LSM and fat quantification of FS were significantly correlated with those of FT(r = 0.645 and 0.620, both Based on the duration and number of times of single detection, success rate, and stability of fat quantification, FT seems to have a better detection efficiency than FS. The detection values of FT and FS can be calculated with regression equations < 0.01). The equations of linear regression were LSM(FT)= 4.435+0.477×LSM(FS); CAP(FT)= 134.71+0.456×CAP(FS). Conclusion: Based on the duration and number of times of single detection, success rate, and stability of fat quantification, FT seems to have a better detection efficiency than FS. The detection values of FT and FS can be calculated with regression equations.
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Affiliation(s)
- J Zeng
- Department of Gastroenterology, Center for Fatty Liver, Xinhua Hospital, Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
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Seregin SS, Golovchenko N, Schaf B, Chen J, Pudlo NA, Mitchell J, Baxter NT, Zhao L, Schloss PD, Martens EC, Eaton KA, Chen GY. NLRP6 Protects Il10 Mice from Colitis by Limiting Colonization of Akkermansia muciniphila. Cell Rep 2017; 19:2174. [DOI: 10.1016/j.celrep.2017.05.074] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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32
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Abstract
Inflammasomes are multiprotein complexes whose primary function is to activate caspase-1, which allows the cleavage of pro-IL-1β and pro-IL-18 to their mature forms. The production of these cytokines has been shown to be critical for host defense as well as the maintenance of intestinal homeostasis and protection against pathologic intestinal inflammation. More recently, there has been growing evidence that inflammasomes are also capable of regulating the composition of the gut microbiota in mice models, which has significant implications for intestinal health and disease. Specifically, the absence of inflammasome components has been associated with pathologic alterations in the gut microbiota, or dysbiosis, that can result in increased susceptibility to colitis and tumorigenesis. In this review, evidence that inflammasome signaling is important for promoting a healthful microbiome and potential mechanisms by which inflammasomes modulate the gut microbiome will be presented. A better understanding of the function of inflammasomes in microbiome regulation may lead to the development of effective strategies for the prevention and treatment of diseases driven by dysbiosis.
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Affiliation(s)
- Grace Y Chen
- Division of Hematology & Oncology, Department of Internal Medicine, 1500 East Medical Center Drive, Ann Arbor, MI 48109, United States.
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Yang RX, Hu CX, Mi YQ, Sun WL, Chen GY, Pan Q, Shen F, Xu GW, Fan JG. [A serum lipidomic study of patients with non-alcoholic fatty liver disease]. Zhonghua Gan Zang Bing Za Zhi 2017; 25:122-127. [PMID: 28297799 DOI: 10.3760/cma.j.issn.1007-3418.2017.02.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the serum lipidomic profile in patients with nonalcoholic fatty liver disease (NAFLD), and to analyze the lipid metabolism characteristics of NAFLD. Methods: The subjects were divided into control group (23 patients) and pathologically confirmed NAFLD group (42 patients), and ultra-high-performance liquid chromatography-tandem mass spectrometry was used to measure serum lipidomic metabolites. The partial least squares-discriminant analysis (PLS-DA) model was established to analyze the differences in lipid metabolism with reference to the univariate analysis. The t-test and Mann-Whitney U test were used for data analysis. Results: A total of 239 lipids were identified and qualitative and quantitative analyses were performed. The PLS-DA model (R2 = 0.753, Q2 = 0.456) and the univariate analysis showed that 77 lipids were metabolized differentially between the NAFLD group and the control group (VIP > 1, P < 0.05), including free fatty acid, phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, lysophosphatidylcholine, lysophosphatidylinositol (LPI), choline plasmalogen (PlsCho), ethanolamine plasmalogen (PlsEtn), ceramide (Cer), sphingomyelin, and triglyceride (TG). Compared with the control group, the NAFLD group had significant increases in monounsaturated fatty acids (increased by 39%, t = -3.954, P < 0.05) and TGs (increased by 36%, Z = -2.662, P < 0.05), mainly TGs with low numbers of carbon atoms and unsaturated bonds, while there were reductions in TGs with high numbers of carbon atoms and unsaturated bonds. In addition, compared with the control group, the NAFLD group had significant increases in the levels of LPI (increased by 223%, t = -3.858, P < 0.05) and Cer (increased by 21%, t = -2.481, P < 0.05) and significant reductions in PlsCho (reduced by 18%, t = 3.184, P < 0.05) and PlsEtn (reduced by 20%, t = 2.363, P < 0.05). Conclusion: There is a significant difference in lipid metabolism profile between NAFLD patients and healthy people, and a serum lipidomic analysis of NAFLD helps to further clarify the characteristics of lipid metabolism in patients with NAFLD.
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Affiliation(s)
- R X Yang
- Center for Fatty Liver, Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - C X Hu
- Dalian Institute of Chemical Physics, CAS Key Laboratory of Separation Science for Analytical Chemistry, Chinese Academy of Sciences, Dalian 116023, China
| | - Y Q Mi
- the Second People's Hospital of Tianjin, Tianjin Medical Research Institute of Liver Disease, Tianjin 300192, China
| | - W L Sun
- Center for Fatty Liver, Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - G Y Chen
- Center for Fatty Liver, Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Q Pan
- Center for Fatty Liver, Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - F Shen
- Center for Fatty Liver, Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - G W Xu
- Dalian Institute of Chemical Physics, CAS Key Laboratory of Separation Science for Analytical Chemistry, Chinese Academy of Sciences, Dalian 116023, China
| | - J G Fan
- Center for Fatty Liver, Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
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Sun WL, Sun CG, Chen GY, Pan Q, Zeng J, Shan PP, Fan JG. [A clinical study of the association between hepatic controlled attenuation parameter and metabolic syndrome]. Zhonghua Gan Zang Bing Za Zhi 2017; 25:128-133. [PMID: 28297800 DOI: 10.3760/cma.j.issn.1007-3418.2017.02.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the association between hepatic controlled attenuation parameter (CAP) and metabolic syndrome (MetS) and the correlation of CAP and its changes with the incidence of MetS. Methods: A total of 2461 subjects who underwent physical examination from July 2013 to September 2015 were enrolled. Spearman correlation analysis was used to investigate the correlation of CAP with the number of MetS components and each MetS component, and the chi-square test was used to investigate the prevalence rates of MetS and each component under different CAP levels. Logistic regression analysis was used to analyze the odds ratio (95% confidence interval (CI)) of MetS under different CAP levels. A total of 230 subjects without baseline MetS were selected; in a prospective cohort study, these subjects were divided into groups according to the baseline CAP, change in CAP, and percent change in CAP, and the chi-square test was performed to compare the incidence of MetS. The Cox regression analysis was used to analyze the values of baseline CAP, change in CAP, and percent change in CAP in predicting MetS. Results: CAP was positively correlated with the number of MetS components (r = 0.309, P < 0.01) and significantly correlated with all components. There were significant differences in the prevalence rates of MetS and its components under different CAP levels (< 238 dB/m, 238-258 dB/m, 259-291 dB/m, and ≥292 dB/m) (P < 0.05). After the adjustment for sex and age, with < 238 dB/m as a reference, the odds ratios (95% CI) of MetS in patients with CAP levels of 238-258 dB/m, 259-291 dB/m, and ≥292 dB/m were 1.784 (1.369-2.325), 2.936 (2.292-3.760), and 4.363 (3.435-5.543), respectively (all P < 0.05). Follow-up data showed that 28 patients (12.2%) developed MetS. After the adjustment for related factors, the hazard ratios (95% CI) of MetS in patients with baseline CAP > 238 dB/m, change in CAP > 30 dB/m, and percent change in CAP > 25.0% were 3.337 (1.163-9.569), 7.732 (2.453-24.366), and 11.656 (3.329-40.813), respectively (all P < 0.05). Conclusion: CAP is closely associated with MetS and its components. CAP and its change can be used to predict the risk of MetS.
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Affiliation(s)
- W L Sun
- Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - C G Sun
- Department of Internal Medicine, Kunshan Geriatric Hospital, Kunshan Jiangsu Province 215324, China
| | - G Y Chen
- Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Q Pan
- Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - J Zeng
- Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - P P Shan
- Department of Internal Medicine, Kunshan Geriatric Hospital, Kunshan Jiangsu Province 215324, China
| | - J G Fan
- Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
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Wu J, Zhu J, Yin H, Liu X, An M, Pudlo NA, Martens EC, Chen GY, Lubman DM. Development of an Integrated Pipeline for Profiling Microbial Proteins from Mouse Fecal Samples by LC-MS/MS. J Proteome Res 2016; 15:3635-3642. [PMID: 27559751 DOI: 10.1021/acs.jproteome.6b00450] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Metaproteomics is one approach to analyze the functional capacity of the gut microbiome but is limited by the ability to evenly extract proteins from diverse organisms within the gut. Herein, we have developed a pipeline to optimize sample preparation of stool obtained from germ-free (GF) mice that were gavaged a defined community of 11 bacterial strains isolated from the human gut. With 64% more proteins identified, bead-beating was confirmed to be an indispensable step for the extraction of bacterial proteins, especially for Gram-positive bacteria. Bacterial enrichment from mouse fecal samples was further optimized by evaluating three different methods: (1) a high-speed differential centrifugation (HCE) or (2) a low-speed differential centrifugation (LCE) and (3) a filter-aided method (FA). The HCE method was associated with dramatic loss of bacteria and 71% less recovery of bacterial proteins than the LCE method. Compared with LCE, the FA method also showed dramatic loss of the amount of bacteria recovered and decreased protein identifications from Gram-positive bacteria in the stool samples. Ultimately, LCE may provide an alternative and complementary method for enriching bacteria from small amounts of mouse fecal samples, which could aid in investigating bacterial function in health and disease.
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Affiliation(s)
- Jing Wu
- Department of Surgery, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Jianhui Zhu
- Department of Surgery, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Haidi Yin
- Department of Surgery, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Xinhua Liu
- Department of Surgery, University of Michigan , Ann Arbor, Michigan 48109, United States.,Experiment Center for Science and Technology, Shanghai University of Traditional Chinese Medicine , Shanghai 201203, China
| | - Mingrui An
- Department of Surgery, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Nicholas A Pudlo
- Department of Microbiology and Immunology, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Eric C Martens
- Department of Microbiology and Immunology, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Grace Y Chen
- Division of Hematology/Oncology, Department of Internal Medicine, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - David M Lubman
- Department of Surgery, University of Michigan , Ann Arbor, Michigan 48109, United States
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Zhan Y, Seregin SS, Chen J, Chen GY. Nod1 Limits Colitis-Associated Tumorigenesis by Regulating IFN-γ Production. J Immunol 2016; 196:5121-9. [PMID: 27183588 DOI: 10.4049/jimmunol.1501822] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 04/15/2016] [Indexed: 01/01/2023]
Abstract
Chronic intestinal inflammation is a major risk factor for the development of colorectal cancer. Nod1, a member of the Nod-like receptor (NLR) family of pattern recognition receptors, is a bacterial sensor that has been previously demonstrated to reduce susceptibility of mice to chemically induced colitis and subsequent tumorigenesis, but the mechanism by which it mediates its protection has not been elucidated. In this study, we show that Nod1 expression in the hematopoietic cell compartment is critical for limiting inflammation-induced intestinal tumorigenesis. Specifically, Nod1-deficient T cells exhibit impaired IFN-γ production during dextran sulfate sodium (DSS)-induced acute inflammation in vivo, and administration of the Nod1 ligand KF1B enhances IFN-γ responses by anti-CD3-activated T cells in vitro. Absence of IFN-γ signaling results in increased inflammation-associated tumors in mice, and adoptive transfer of Nod1(-/-) or IFNγ(-/-) T cells into T cell-deficient mice results in increased tumorigenesis as compared with T cell-deficient mice that were adoptively transferred with wild-type T cells. Collectively, these results suggest a previously unappreciated role for the innate immune receptor Nod1 in suppressing colitis-associated tumorigenesis through a T cell-mediated mechanism.
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Affiliation(s)
- Yu Zhan
- Division of Hematology/Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Sergey S Seregin
- Division of Hematology/Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Jiachen Chen
- Division of Hematology/Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Grace Y Chen
- Division of Hematology/Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
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Seregin SS, Chen GY, Laouar Y. Dissecting CD8+ NKT Cell Responses to Listeria Infection Reveals a Component of Innate Resistance. J Immunol 2015; 195:1112-20. [PMID: 26116500 DOI: 10.4049/jimmunol.1500084] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 05/23/2015] [Indexed: 12/21/2022]
Abstract
A small pool of NK1.1(+) CD8(+) T cells is harbored among the conventional CD8(+) T cell compartment. Conclusions drawn from the analysis of immune responses mediated by cytotoxic CD8(+) T cells are often based on the total population, which includes these contaminating NK1.1(+) CD8(+) T cells. An unresolved question is whether NK1.1(+) CD8(+) cells are conventional T cells that acquire NK1.1 expression upon activation or delineation into memory phenotype or whether they are a distinct cell population that induces immune responses in a different manner than conventional T cells. To address this question, we used the Listeria monocytogenes model of infection and followed CD8(+) NK1.1(+) T cells and NK1.1(-) CD8(+) T cells during each phase of the immune response: innate, effector, and memory. Our central finding is that CD8(+) NK1.1(+) cells and conventional NK1.1(-) CD8(+) T cells both contribute to the adaptive immune response to Listeria, but only CD8(+) NK1.1(+) cells were equipped with the ability to provide a rapid innate immune response, as demonstrated by early and Ag-independent IFN-γ production, granzyme B expression, and degranulation. More importantly, purified conventional CD8(+) T cells alone, in the absence of any contaminating CD8(+) NK1.1(+) cells, were not sufficient to provide early protection to lethally infected mice. These results highlight the role of CD8(+) NK1.1(+) T cells in mounting early innate responses that are important for host defense and support the therapeutic potential of this subset to improve the effectiveness of protective immunity.
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Affiliation(s)
- Sergey S Seregin
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109; and
| | - Grace Y Chen
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Yasmina Laouar
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109; and
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Tang ZG, Chen GY, Li LF, Wen C, Wang T, Zhou YM. Effect of zinc-bearing zeolite clinoptilolite on growth performance, zinc accumulation, and gene expression of zinc transporters in broilers. J Anim Sci 2015; 93:620-6. [PMID: 25548200 DOI: 10.2527/jas.2014-8165] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This study investigated Zn-bearing zeolite clinoptilolite (Zn-ZCP) as a Zn supplement on performance, organ or tissue development, Zn accumulation in tissues, and gene expression of Zn transporters in the duodenum of broilers. A total of 300 1-d-old Arbor Acres chickens were randomly allocated to 5 dietary treatments with 6 replicate cages of 10 birds per treatment for a 21-d feeding period. The treatments comprised a basal corn–soybean meal diet without supplemental Zn (the control) or similar diets supplemented with 80 mg/kg Zn from ZnSO4 or 20, 40, or 80 mg/kg Zn from Zn- ZCP, respectively. Supplementation of Zn-ZCP had a positive effect on G:F (linear, P < 0.05) and had tendency difference on ADG (linear, P < 0.1) of broilers during 1 to 21 d. Incremental Zn-ZCP inclusion in the diet increased the fresh weight of the pancreas (linear, P < 0.05) and tibia (linear, P < 0.05) in broilers on d 14. The same trend to the fresh weight of the tibia (linear, P < 0.05) and pancreas (linear, P < 0.05) was observed on d 21. Increasing Zn-ZCP level showed a linear response on Zn concentration in the liver (linear, P < 0.001), pancreas (linear, P < 0.05), and tibia (linear, P < 0.05) on d 14. The same trend of Zn concentrations in pancreas (linear, P < 0.05) and tibia (linear, P < 0.001) was observed on d 21. The mRNA levels of Zn transporter 2 (ZnT-2) and Zn transporter 5 (ZnT-5) in the duodenum of chicks fed the diet with 80 mg/kg Zn from Zn-ZCP did not differ from those of chicks fed the control diet, but both were lower (P < 0.05) than those of chicks fed ZnSO4 diet. Metallothionein (MT) mRNA levels of broilers fed the diet supplemented with 80 mg/kg Zn from Zn-ZCP or ZnSO4 was higher (P < 0.05) than that in the control group. Dietary treatments did not affect the mRNA expression of Zn transporter 1 (ZnT-1) or metal response element-binding transcription factor-1 (MTF-1). In conclusion, as a Zn supplement, Zn-ZCP was comparable to ZnSO4 for enhancing Zn accumulation and growth performance of broilers during 1 to 21 d. Broilers fed the diet with 80 mg/kg Zn from Zn-ZCP had different expressions of ZnT-2 and ZnT-5 in the duodenum compared with those fed the ZnSO4 diet.
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Wang X, Chen GY, Yang SS, Tian Y, Ge T, Qin H, Han W, Chang HY. Effects of high thoracic epidural anesthesia on ischemic cardiomyopathy cardiac function and autonomic neural function. Genet Mol Res 2014; 13:6813-9. [PMID: 25177960 DOI: 10.4238/2014.august.29.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We aimed at observing the effects of high thoracic epidural anesthesia (HTEA) on cardiac structure and function, heart rate variability (HRV), and QT interval variation (QTV) in ischemic cardiomyopathy (ICM) patients with chronic heart failure. We divided 30 ICM patients into HTEA (N = 16) and control (N = 14) groups.The control group was treated with medication, and the HTEA group was treated with HTEA and medication for 4 weeks. We measured the changes in the left-ventricular end-diastolic diameter (LVEDd) and left-ventricular ejection fraction (LVEF) before and after treatment by using echocardiography and examined changes in HRV and QTV using ambulatory electrocardiogram. HTEA significantly narrowed the LVEDd, improved LVEF, significantly increased the HRV, and significantly reduced the QTV in the ICM group compared to the control group. HTEA significantly narrowed the ventricular chamber diameter size of ICM patients, enhanced myocardial contractility, increased myocardial electrical stability, and improved the cardiac structure and function.
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Affiliation(s)
- X Wang
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Nangang District, Harbin, Heilongjiang, China
| | - G Y Chen
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Nangang District, Harbin, Heilongjiang, China
| | - S S Yang
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Nangang District, Harbin, Heilongjiang, China
| | - Y Tian
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Nangang District, Harbin, Heilongjiang, China
| | - T Ge
- Department of Medical, Second Hospital of Harbin City, Harbin, Heilongjiang, China
| | - H Qin
- Department of Medical, Second Hospital of Harbin City, Harbin, Heilongjiang, China
| | - W Han
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Nangang District, Harbin, Heilongjiang, China
| | - H Y Chang
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Nangang District, Harbin, Heilongjiang, China
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Chen GY. Role of Nlrp6 and Nlrp12 in the maintenance of intestinal homeostasis. Eur J Immunol 2014; 44:321-7. [PMID: 24338634 DOI: 10.1002/eji.201344135] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 11/29/2013] [Accepted: 12/06/2013] [Indexed: 01/01/2023]
Abstract
There has been significant interest in understanding how interactions between the host immune system and the gut microbiota regulate intestinal homeostasis. Recent data suggest that the Nod-like receptor (NLR) family of PRRs regulate both the composition of the gut microbiota and innate immune signaling pathways that prevent pathologic intestinal inflammation and tumorigenesis. In this review, we will focus on NLRP6 and NLRP12, two members of the NLR family that have emerged as important players in the maintenance of intestinal homeostasis, and discuss the signaling pathways engaged by these receptors as well as the current models of how these receptors protect against the development of colitis and tumorigenesis.
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Affiliation(s)
- Grace Y Chen
- Division of Hematology and Oncology, Department of Internal Medicine, and Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI, USA
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Baxter NT, Zackular JP, Chen GY, Schloss PD. Structure of the gut microbiome following colonization with human feces determines colonic tumor burden. Microbiome 2014; 2:20. [PMID: 24967088 PMCID: PMC4070349 DOI: 10.1186/2049-2618-2-20] [Citation(s) in RCA: 202] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 06/04/2014] [Indexed: 05/06/2023]
Abstract
BACKGROUND A growing body of evidence indicates that the gut microbiome plays a role in the development of colorectal cancer (CRC). Patients with CRC harbor gut microbiomes that are structurally distinct from those of healthy individuals; however, without the ability to track individuals during disease progression, it has not been possible to observe changes in the microbiome over the course of tumorigenesis. Mouse models have demonstrated that these changes can further promote colonic tumorigenesis. However, these models have relied upon mouse-adapted bacterial populations and so it remains unclear which human-adapted bacterial populations are responsible for modulating tumorigenesis. RESULTS We transplanted fecal microbiota from three CRC patients and three healthy individuals into germ-free mice, resulting in six structurally distinct microbial communities. Subjecting these mice to a chemically induced model of CRC resulted in different levels of tumorigenesis between mice. Differences in the number of tumors were strongly associated with the baseline microbiome structure in mice, but not with the cancer status of the human donors. Partitioning of baseline communities into enterotypes by Dirichlet multinomial mixture modeling resulted in three enterotypes that corresponded with tumor burden. The taxa most strongly positively correlated with increased tumor burden were members of the Bacteroides, Parabacteroides, Alistipes, and Akkermansia, all of which are Gram-negative. Members of the Gram-positive Clostridiales, including multiple members of Clostridium Group XIVa, were strongly negatively correlated with tumors. Analysis of the inferred metagenome of each community revealed a negative correlation between tumor count and the potential for butyrate production, and a positive correlation between tumor count and the capacity for host glycan degradation. Despite harboring distinct gut communities, all mice underwent conserved structural changes over the course of the model. The extent of these changes was also correlated with tumor incidence. CONCLUSION Our results suggest that the initial structure of the microbiome determines susceptibility to colonic tumorigenesis. There appear to be opposing roles for certain Gram-negative (Bacteroidales and Verrucomicrobia) and Gram-positive (Clostridiales) bacteria in tumor susceptibility. Thus, the impact of community structure is potentially mediated by the balance between protective, butyrate-producing populations and inflammatory, mucin-degrading populations.
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Affiliation(s)
- Nielson T Baxter
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
| | - Joseph P Zackular
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
| | - Grace Y Chen
- Department of Internal Medicine, Division of Hematology and Oncology, University of Michigan, Ann Arbor, Michigan, USA
| | - Patrick D Schloss
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
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Jiao Y, Darzi Y, Tawaratsumida K, Marchesan JT, Hasegawa M, Moon H, Chen GY, Núñez G, Giannobile WV, Raes J, Inohara N. Induction of bone loss by pathobiont-mediated Nod1 signaling in the oral cavity. Cell Host Microbe 2013; 13:595-601. [PMID: 23684310 DOI: 10.1016/j.chom.2013.04.005] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 03/15/2013] [Accepted: 04/12/2013] [Indexed: 01/24/2023]
Abstract
Periodontitis is a common disease that is characterized by resorption of the alveolar bone and mediated by commensal bacteria that trigger host immune responses and bone destruction through unidentified mechanisms. We report that Nod1, an innate intracellular host receptor for bacterial peptidoglycan-related molecules, is critical for commensal-induced periodontitis in a mouse model. Mice lacking Nod1 exhibit reduced bone resorption as well as impaired recruitment of neutrophils to gingival tissues and osteoclasts to the alveolar bone, which mediate tissue and bone destruction. Further analysis showed that accumulation of a Nod1-stimulating commensal bacterium, NI1060, at gingival sites was sufficient to induce neutrophil recruitment and bone resorption. Genomic sequencing revealed that NI1060 is a mouse-specific bacterium that is related to bacteria associated with the development of aggressive periodontitis in humans. These findings provide insight into commensal-host interactions contributing to periodontitis and identify a potential target for preventing this common oral disease.
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Affiliation(s)
- Yizu Jiao
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Youssef Darzi
- Department of Structural Biology, Flemish Institute for Biotechnology, 1050 Brussels, Belgium
| | - Kazuki Tawaratsumida
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Julie T Marchesan
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA
| | - Mizuho Hasegawa
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Henry Moon
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Grace Y Chen
- Division of Hematology/Oncology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Comprehensive Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Gabriel Núñez
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Comprehensive Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - William V Giannobile
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA
| | - Jeroen Raes
- Department of Structural Biology, Flemish Institute for Biotechnology, 1050 Brussels, Belgium
| | - Naohiro Inohara
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
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Zhan Y, Chen PJ, Sadler WD, Wang F, Poe S, Núñez G, Eaton KA, Chen GY. Gut microbiota protects against gastrointestinal tumorigenesis caused by epithelial injury. Cancer Res 2013; 73:7199-210. [PMID: 24165160 DOI: 10.1158/0008-5472.can-13-0827] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Inflammation is a critical player in the development of both colitis-associated and sporadic colon cancers. Several studies suggest that the microbiota contribute to inflammation and tumorigenesis; however, studies to understand the role of the microbiota in colon tumor development in germ-free (GF) mice are limited. We therefore studied the effects of the microbiota on the development of inflammation and tumors in GF and conventionally raised specific pathogen-free (SPF) mice treated with azoxymethane (AOM) and dextran sulfate sodium (DSS). We discovered that GF mice developed significantly more and larger tumors compared with that in SPF mice after AOM and DSS treatment despite the lack of early acute inflammation in response to chemically induced injury by DSS. Although the extent of intestinal epithelial damage and apoptosis was not significantly different in GF and SPF mice, there was a delay in intestinal epithelial repair to DSS-induced injury in GF mice resulting in a late onset of proinflammatory and protumorigenic responses and increased epithelial proliferation and microadenoma formation. Recolonization of GF mice with commensal bacteria or administration of lipopolysaccharide reduced tumorigenesis. Thus, although commensal bacteria are capable of driving chronic inflammation and tumorigenesis, the gut microbiota also have important roles in limiting chemically induced injury and proliferative responses that lead to tumor development.
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Affiliation(s)
- Yu Zhan
- Authors' Affiliations: Division of Hematology and Oncology, Department of Internal Medicine, Department of Pathology, Comprehensive Cancer Center, Unit for Laboratory Animal Medicine, and Department of Microbiology and Immunology, University of Michigan Medical School, University of Michigan, Ann Arbor, Michigan
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Abstract
A dense resident microbial community in the gut, referred as the commensal microbiota, coevolved with the host and is essential for many host physiological processes that include enhancement of the intestinal epithelial barrier, development of the immune system and acquisition of nutrients. A major function of the microbiota is protection against colonization by pathogens and overgrowth of indigenous pathobionts that can result from the disruption of the healthy microbial community. The mechanisms that regulate the ability of the microbiota to restrain pathogen growth are complex and include competitive metabolic interactions, localization to intestinal niches and induction of host immune responses. Pathogens, in turn, have evolved strategies to escape from commensal-mediated resistance to colonization. Thus, the interplay between commensals and pathogens or indigenous pathobionts is critical for controlling infection and disease. Understanding pathogen-commensal interactions may lead to new therapeutic approaches to treating infectious diseases.
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Affiliation(s)
- Nobuhiko Kamada
- Department of Pathology and Comprehensive Cancer Center, University of Michigan, Ann Arbor 48109, USA
| | - Grace Y. Chen
- Department of Internal Medicine and Comprehensive Cancer Center, University of Michigan, Ann Arbor 48109, USA
| | - Naohiro Inohara
- Department of Pathology, University of Michigan, Ann Arbor 48109, USA
| | - Gabriel Núñez
- Department of Pathology and Comprehensive Cancer Center, University of Michigan, Ann Arbor 48109, USA
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Li J, Chen TR, Gong HL, Wan MH, Chen GY, Tang WF. Intensive insulin therapy in severe acute pancreatitis: a meta-analysis and systematic review. W INDIAN MED J 2012; 61:574-579. [PMID: 23441350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To assess the effect of intensive insulin therapy on outcomes of patients with severe acute pancreatitis. METHODS Relevant literatures cited in these electronic databases: Medline, Chinese Biomedical Literature Database, China National Knowledge Infrastructure (CNK1) database, and Excerpta Medical database (Embase) were systematically searched for randomized controlled trials (RCTs) in which intensive insulin therapy was used in severe acute pancreatitis. Length of hospitalization, acute physiology and chronic health evaluation II (APACHE II) score, incidence of complications, and adverse effects were recorded for statistical analysis. The methodological quality of the eligible studies was assessed by Jadad scale. The results were analysed by Revman 4.3 software. RESULTS Three studies, which included a total of 118 cases, were finally reviewed. The methodological quality of the trials varied substantially In patients with severe acute pancreatitis, intensive insulin therapy was associated with shorter length of hospitalization (weighted mean difference (WMD) = -12.13, 95% confidence interval (CI) [-15.48, 8.78], p > 0.00001) and lower APACHE II score after 72 hours treatment (WMD = -3.80, 95% CI [-4.88,2. 72], p > 0.00001). One study reported insulin-related adverse event. CONCLUSION In patients with severe acute pancreatitis, intensive insulin therapy could relieve the patient's condition earlier and shorten the length of hospitalization without serious adverse effect.
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Affiliation(s)
- J Li
- Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
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Abstract
A compact optical microfiber phase modulator with MHz bandwidth is presented. A micrometer-diameter microfiber is wound on a millimeter-diameter piezoelectric ceramic rod with two electrodes. When a voltage is applied to the piezoelectric ceramic, the rod is strained, leading to a phase change along the microfiber; because of the small size, the optical microfiber phase modulator can have as high as a few MHz bandwidth response.
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Affiliation(s)
- Xueliang Zhang
- Optoelectronics Research Centre, University of Southampton, Southampton, UK.
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47
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Abstract
Inflammasomes are multi-protein complexes that mediate activation of caspase-1, which promotes secretion of the proinflammatory cytokines interleukin-1β and interleukin-18 and pyroptosis, a form of phagocyte cell death induced by bacterial pathogens. Members of the Nod-like receptor family (including Nlrp1, Nlrp3, and Nlrc4), the DNA sensor Aim2, the adaptor apoptosis-associated speck-like protein (ASC), and pro-caspase-1 are important components of inflammasomes. Stimulation with specific microbial and endogenous molecules leads to inflammasome assembly and caspase-1 activation. Inflammasomes are believed to mediate host defense against microbial pathogens and tissue homeostasis within the intestine, and their dysregulation might contribute to inflammatory diseases and intestinal cancer. Improving our understanding of inflammasome signaling pathways could provide insights into the pathogenesis of many gastrointestinal disorders and the development of therapeutic targets and approaches to treat diseases such as inflammatory bowel diseases and gastrointestinal cancers.
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Affiliation(s)
- Grace Y. Chen
- Division of Hematology and Oncology, Department of Internal Medicine, and Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI 48109
| | - Gabriel Núñez
- Department of Pathology, and Comprehensive Cancer Center, University of Michigan, MI 48109
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48
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Tanikawa T, Wilke CM, Kryczek I, Chen GY, Kao J, Núñez G, Zou W. Interleukin-10 ablation promotes tumor development, growth, and metastasis. Cancer Res 2011; 72:420-9. [PMID: 22123924 DOI: 10.1158/0008-5472.can-10-4627] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Interleukin-10 (IL-10) is a broadly acting immune inhibitory cytokine that is generally thought to support tumor growth. Here we challenge this view with evidence that genetic ablation of IL-10 in the mouse significantly heightens sensitivity to chemical carcinogenesis, growth of transplanted tumors, and formation of metastases. Tumor growth in IL-10-deficient (IL-10(-/-)) mice was associated with an increased level of myeloid-derived suppressor cells (MDSC) and CD4(+)Foxp3(+) regulatory T (Treg) cells in both the tumor microenvironment and the tumor-draining lymph nodes. IL-10(-/-) MDSCs express high levels of MHC and IL-1, and they efficiently induced formation of Treg cells. IL-1 signaling blockade reduced tumor growth mediated by IL-10 deficiency, associated with a partial rescue of tumor infiltration and function of effector T cells and a decrease in tumor angiogenesis and tumor infiltration by Treg cells. Taken together, our findings establish that endogenous IL-10 inhibits inflammatory cytokine production and hampers the development of Treg cells and MDSCs, two key components of the immunosuppressive tumor microenvironment, thereby inhibiting tumor development, growth, and metastasis.
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Affiliation(s)
- Takashi Tanikawa
- Department of Surgery, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA
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49
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Chen GY, Zhang XL, Brambilla G, Newson TP. Theoretical and experimental demonstrations of a microfiber-based flexural disc accelerometer. Opt Lett 2011; 36:3669-3671. [PMID: 21931427 DOI: 10.1364/ol.36.003669] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The proof-of-concept demonstration of a microfiber-based flexural disc accelerometer is presented. The reduced microfiber size and bending radii give rise to high device compactness and responsivity. A flexural disc accelerometer manufactured from a 10 mm long microfiber showed a performance of ~2.2 rad/g, with the responsivity expected to increase proportionally with the microfiber length.
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Affiliation(s)
- G Y Chen
- Optoelectronics Research Centre, University of Southampton, Southampton, UK.
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50
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Kim YG, Kamada N, Shaw MH, Warner N, Chen GY, Franchi L, Núñez G. The Nod2 sensor promotes intestinal pathogen eradication via the chemokine CCL2-dependent recruitment of inflammatory monocytes. Immunity 2011; 34:769-80. [PMID: 21565531 DOI: 10.1016/j.immuni.2011.04.013] [Citation(s) in RCA: 193] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Revised: 01/18/2011] [Accepted: 02/16/2011] [Indexed: 12/14/2022]
Abstract
The intracellular sensor Nod2 is activated in response to bacteria, and the impairment of this response is linked to Crohn's disease. However, the function of Nod2 in host defense remains poorly understood. We found that Nod2-/- mice exhibited impaired intestinal clearance of Citrobacter rodentium, an enteric bacterium that models human infection by pathogenic Escherichia coli. The increased bacterial burden was preceded by reduced CCL2 chemokine production, inflammatory monocyte recruitment, and Th1 cell responses in the intestine. Colonic stromal cells, but not epithelial cells or resident CD11b+ phagocytic cells, produced CCL2 in response to C. rodentium in a Nod2-dependent manner. Unlike resident phagocytic cells, inflammatory monocytes produced IL-12, a cytokine that induces adaptive immunity required for pathogen clearance. Adoptive transfer of Ly6C(hi) monocytes restored the clearance of the pathogen in infected Ccr2-/- mice. Thus, Nod2 mediates CCL2-CCR2-dependent recruitment of inflammatory monocytes, which is important in promoting bacterial eradication in the intestine.
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Affiliation(s)
- Yun-Gi Kim
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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