1
|
Ebeid TA, Al-Homidan IH, Saleh AA, Barakat HA. Physiological and immunological aspects of feed restriction and its beneficial impacts in fattening rabbits' productivity-an updated review. Trop Anim Health Prod 2024; 56:33. [PMID: 38183493 DOI: 10.1007/s11250-023-03881-0] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 12/22/2023] [Indexed: 01/08/2024]
Abstract
Two feed restriction (FR) regimens are utilized with weaned rabbits including a quantitative FR (amount-limited feed or time-restricted admission to feed) and a qualitative FR (modulation of diet content especially protein and energy). The use of post-weaning FR may help in preventing post-weaning digestive disorders, stimulating compensating growth, improving feed efficiency, and decreasing carcass fat content. Interestingly, FR may contribute to changing meat's chemical composition and its physical quality attributes by regulating the morphological and biochemical characteristics of muscle fibers. Also, FR could enhance the gastrointestinal tract development, its histomorphology, and improve feed digestibility and absorption. Furthermore, FR regimens are involved in establishing gut microbial balance and enhancing the host immunological response. It might be concluded that post-weaning FR is involved in influencing the physiological and immunological aspects of growing rabbits. It might be documented that light to mild FR (i.e., 80-90% AL), early (i.e., at the first 2 weeks post-weaning), and relatively short in duration (i.e., for 2-3 weeks) had no negative effects on live body weight, while severing FR reduced live body weight in comparison with ad libitum rabbits.
Collapse
Affiliation(s)
- Tarek Amin Ebeid
- Department of Animal Production and Breeding, College of Agriculture and Veterinary Medicine, Qassim University, 51452, Buraydah, Saudi Arabia.
- Department of Poultry Production, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh, 33516, Egypt.
| | - Ibrahim Hamad Al-Homidan
- Department of Animal Production and Breeding, College of Agriculture and Veterinary Medicine, Qassim University, 51452, Buraydah, Saudi Arabia
| | - Ahmed Ali Saleh
- Department of Poultry Production, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh, 33516, Egypt
| | - Hassan Ahmed Barakat
- Department of Food Science and Human Nutrition, College of Agriculture and Veterinary Medicine, Qassim University, 51452, Buraydah, Saudi Arabia
- Food Technology Department, Faculty of Agriculture, Benha University, Moshtohor, 13736, Egypt
| |
Collapse
|
2
|
The SMML, Schreurs RRCE, Drewniak A, Bakx R, de Meij TGJ, Budding AE, Poort L, Cense HA, Heij HA, van Heurn LWE, Gorter RR, Bunders MJ. Enhanced Th17 responses in the appendix of children with complex compared to simple appendicitis are associated with microbial dysbiosis. Front Immunol 2024; 14:1258363. [PMID: 38239362 PMCID: PMC10794624 DOI: 10.3389/fimmu.2023.1258363] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 11/17/2023] [Indexed: 01/22/2024] Open
Abstract
Introduction Appendicitis is one of the most common causes of acute abdominal surgery in children. The clinical course of appendicitis ranges from simple to complex appendicitis. The mechanisms underlying the heterogeneity of appendicitis in children remain largely unclear. Dysregulated T cell responses play an important role in several inflammatory diseases of the intestine, but the extend of T cell dysregulation in appendicitis in children is less well known. Methods To characterize appendiceal T cells in simple and complex appendicitis we performed in-depth immunophenotyping of appendiceal-derived T cells by flow cytometry and correlated this to appendiceal-derived microbiota analyses of the same patient. Results Appendix samples of twenty children with appendicitis (n = 8 simple, n = 12 complex) were collected. T cells in complex appendicitis displayed an increased differentiated phenotype compared to simple appendicitis, including a loss of both CD27 and CD28 by CD4+ T cells and to a lesser extent by CD8+ T cells. Frequencies of phenotypic tissue-resident memory CD69+CD4+ T cells and CD69+CD8+ T cells were decreased in children with complex compared to simple appendicitis, indicating disruption of local tissue-resident immune responses. In line with the increased differentiated phenotype, cytokine production of in particular IL-17A by CD4+ T cells was increased in children with complex compared to simple appendicitis. Furthermore, frequencies of IL-17A+ CD4+ T cells correlated with a dysregulation of the appendiceal microbiota in children with complex appendicitis. Conclusion In conclusion, disruption of local T cell responses, and enhanced pro-inflammatory Th17 responses correlating to changes in the appendiceal microbiota were observed in children with complex compared to simple appendicitis. Further studies are needed to decipher the role of a dysregulated network of microbiota and Th17 cells in the development of complex appendicitis in children.
Collapse
Affiliation(s)
- Sarah-May M. L. The
- Department of Paediatric Surgery, Emma Children’s Hospital, Amsterdam University Medical Center (UMC), University of Amsterdam & Vrije Universiteit Amsterdam, Amsterdam, Netherlands
- Amsterdam Reproduction and Development Research Institute, Amsterdam, Netherlands
- Department of Experimental Immunology, Amsterdam Infection & Immunity Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Renée R. C. E. Schreurs
- Department of Experimental Immunology, Amsterdam Infection & Immunity Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
- Department of Paediatrics, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam & Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Agata Drewniak
- Department of Experimental Immunology, Amsterdam Infection & Immunity Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Roel Bakx
- Department of Paediatric Surgery, Emma Children’s Hospital, Amsterdam University Medical Center (UMC), University of Amsterdam & Vrije Universiteit Amsterdam, Amsterdam, Netherlands
- Amsterdam Reproduction and Development Research Institute, Amsterdam, Netherlands
- Amsterdam Gastroenterology and Metabolism Research Institute, Amsterdam, Netherlands
| | - Tim G. J. de Meij
- Amsterdam Reproduction and Development Research Institute, Amsterdam, Netherlands
- Amsterdam Gastroenterology and Metabolism Research Institute, Amsterdam, Netherlands
- Department of Paediatric Gastroenterology, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | | | | | - Huib A. Cense
- Department of Surgery, Red Cross Hospital, Beverwijk, Netherlands
| | - Hugo A. Heij
- Department of Paediatric Surgery, Emma Children’s Hospital, Amsterdam University Medical Center (UMC), University of Amsterdam & Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - L. W. Ernest van Heurn
- Department of Paediatric Surgery, Emma Children’s Hospital, Amsterdam University Medical Center (UMC), University of Amsterdam & Vrije Universiteit Amsterdam, Amsterdam, Netherlands
- Amsterdam Reproduction and Development Research Institute, Amsterdam, Netherlands
- Amsterdam Gastroenterology and Metabolism Research Institute, Amsterdam, Netherlands
| | - Ramon R. Gorter
- Department of Paediatric Surgery, Emma Children’s Hospital, Amsterdam University Medical Center (UMC), University of Amsterdam & Vrije Universiteit Amsterdam, Amsterdam, Netherlands
- Amsterdam Reproduction and Development Research Institute, Amsterdam, Netherlands
- Amsterdam Gastroenterology and Metabolism Research Institute, Amsterdam, Netherlands
| | - Madeleine J. Bunders
- Leibniz Institute of Virology, Hamburg, Germany
- Third Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| |
Collapse
|
3
|
Agrawal M, Allin KH, Mehandru S, Faith J, Jess T, Colombel JF. The appendix and ulcerative colitis - an unsolved connection. Nat Rev Gastroenterol Hepatol 2023; 20:615-624. [PMID: 37081213 PMCID: PMC10527463 DOI: 10.1038/s41575-023-00774-3] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/29/2023] [Indexed: 04/22/2023]
Abstract
The appendix is thought to have a role in the pathogenesis of ulcerative colitis, but the nature and basis of this association remains unclear. In this Perspective, we consider the biology of the appendix with respect to its immunological function and the microbiome, and how this relates to evidence that supports the involvement of the appendix in ulcerative colitis. In experimental models, removal of the inflamed appendix prevents colitis, and in human observational studies, appendectomy is associated with protection against ulcerative colitis. Further, among people who develop ulcerative colitis, appendectomy before diagnosis might influence the course and outcomes of the disease - some evidence suggests that it protects against colectomy but could increase the risk of colorectal cancer. Appendectomy after onset of ulcerative colitis seems to have disparate consequences. Clinical trials to understand whether appendectomy has a role in the treatment of ulcerative colitis are ongoing. Major questions about the role of the appendix in the pathogenesis of ulcerative colitis remain unanswered, and further research is needed to establish whether the connection is clinically relevant.
Collapse
Affiliation(s)
- Manasi Agrawal
- The Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- Center for Molecular Prediction of Inflammatory Bowel Disease, Department of Clinical Medicine, Aalborg University, Copenhagen, Denmark.
| | - Kristine H Allin
- Center for Molecular Prediction of Inflammatory Bowel Disease, Department of Clinical Medicine, Aalborg University, Copenhagen, Denmark
- Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Saurabh Mehandru
- The Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jeremiah Faith
- Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Tine Jess
- Center for Molecular Prediction of Inflammatory Bowel Disease, Department of Clinical Medicine, Aalborg University, Copenhagen, Denmark
- Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Jean-Frederic Colombel
- The Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| |
Collapse
|
4
|
Chen YW, Hsu PK, Lin SP, Chen HH. Appendicitis is associated with an increased risk of systemic lupus erythematosus: a nationwide, population-based, case-control study. Clin Rheumatol 2023:10.1007/s10067-023-06585-w. [PMID: 37040052 DOI: 10.1007/s10067-023-06585-w] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/20/2023] [Accepted: 03/22/2023] [Indexed: 04/12/2023]
Abstract
OBJECTIVE To examine the association between appendicitis and the risk of systemic lupus erythematosus (SLE). METHODS Using claims data from the 2003-2013 Taiwanese National Health Insurance Research Database, we selected 6054 patients with newly diagnosed SLE from 2007 to 2012 and 36,324 age-, sex- and year of SLE diagnosis date-matched (1:6) non-SLE controls. After controlling for potential confounders, a multivariable conditional logistic regression model was used to calculate the adjusted odds ratio (aOR) with 95% confidence interval (CI) for the association of appendicitis history with SLE. Sensitivity analyses were conducted using various definitions of appendicitis. Subgroup analyses were conducted to examine possible modification effects by age, gender, level of urbanization, income and Charlson Comorbidity Index (CCI). RESULTS The average age of patients was 38 years old in both groups. The proportion of females was 86.5%. 75 (1.2%) of SLE cases and 205 (0.6%) of non-SLE controls had appendicitis history before the index date. After adjusting for potential confounding factors, appendicitis was associated with a higher risk of SLE (aOR, 1.84; 95% CI, 1.34-2.52), and such association remained robust after variation of appendicitis definition. No significant modification effects were found for the association between appendicitis and SLE by age, gender, urbanization level, income and CCI. CONCLUSION This nationwide, population-based case-control study demonstrates an association between appendicitis and incident SLE. Lack of individual smoking status is a major limitation. Key Points • Appendicitis was significantly associated with an increased risk of SLE. • Such association remained robust using various definitions of appendicitis.
Collapse
Affiliation(s)
- Yun-Wen Chen
- Division of General Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Sect. 4, Taichung, Taiwan, 40705, ROC
- Division of Allergy, Immunology and Rheumatology, Department of Internal Medicine, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Sect. 4, Taichung, Taiwan, 40705, ROC
- Department of Post-Baccalaureate Medicine, National Chung Hsing University, Taichung, Taiwan
| | - Po-Ke Hsu
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan
| | - Shih-Ping Lin
- Division of General Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Sect. 4, Taichung, Taiwan, 40705, ROC
- Department of Post-Baccalaureate Medicine, National Chung Hsing University, Taichung, Taiwan
- Division of Infection, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Hsin-Hua Chen
- Division of General Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Sect. 4, Taichung, Taiwan, 40705, ROC.
- Division of Allergy, Immunology and Rheumatology, Department of Internal Medicine, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Sect. 4, Taichung, Taiwan, 40705, ROC.
- Department of Post-Baccalaureate Medicine, National Chung Hsing University, Taichung, Taiwan.
- School of Medicine, National Yang-Ming Chiao Tung University, Taipei, Taiwan.
- Department of Industrial Engineering and Enterprise Information, Tunghai University, 1650 Taiwan Boulevard Sect. 4, Taichung, Taiwan, 40705, ROC.
- Institute of Biomedical Science and Rong Hsing Research Center for Translational Medicine & Big Data Center, National Chung Hsin University, Taichung, Taiwan.
| |
Collapse
|
5
|
Abo-Shaban T, Sharna SS, Hosie S, Lee CYQ, Balasuriya GK, McKeown SJ, Franks AE, Hill-Yardin EL. Issues for patchy tissues: defining roles for gut-associated lymphoid tissue in neurodevelopment and disease. J Neural Transm (Vienna) 2023; 130:269-280. [PMID: 36309872 PMCID: PMC10033573 DOI: 10.1007/s00702-022-02561-x] [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: 08/30/2022] [Accepted: 10/20/2022] [Indexed: 10/31/2022]
Abstract
Individuals diagnosed with neurodevelopmental conditions such as autism spectrum disorder (ASD; autism) often experience tissue inflammation as well as gastrointestinal dysfunction, yet their underlying causes remain poorly characterised. Notably, the largest components of the body's immune system, including gut-associated lymphoid tissue (GALT), lie within the gastrointestinal tract. A major constituent of GALT in humans comprises secretory lymphoid aggregates known as Peyer's patches that sense and combat constant exposure to pathogens and infectious agents. Essential to the functions of Peyer's patches is its communication with the enteric nervous system (ENS), an intrinsic neural network that regulates gastrointestinal function. Crosstalk between these tissues contribute to the microbiota-gut-brain axis that altogether influences mood and behaviour. Increasing evidence further points to a critical role for this signalling axis in neurodevelopmental homeostasis and disease. Notably, while the neuroimmunomodulatory functions for Peyer's patches are increasingly better understood, functions for tissues of analogous function, such as caecal patches, remain less well characterised. Here, we compare the structure, function and development of Peyer's patches, as well as caecal and appendix patches in humans and model organisms including mice to highlight the roles for these essential tissues in health and disease. We propose that perturbations to GALT function may underlie inflammatory disorders and gastrointestinal dysfunction in neurodevelopmental conditions such as autism.
Collapse
Affiliation(s)
- T Abo-Shaban
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, Australia
| | - S S Sharna
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, Australia
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, USA
- Department of Pathology, Texas Children's Microbiome Center, Texas Children's Hospital, Houston, TX, USA
| | - S Hosie
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, Australia
| | - C Y Q Lee
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, Australia
| | - G K Balasuriya
- Department of Physiology and Cell Biology, Kobe University School of Medicine, 7-5-1 Kusunoki-Cho, Chuo, Kobe, 650-0017, Japan
| | - S J McKeown
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute, Department of Anatomy and Developmental Biology, Monash University, Clayton, VIC, Australia
| | - A E Franks
- Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, VIC, Australia
| | - E L Hill-Yardin
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, Australia.
| |
Collapse
|
6
|
Pogány Simonová M, Lauková A, Chrastinová Ľ, Kandričáková A, Ščerbová J, Strompfová V, Miltko R, Belzecki G. Enterocins as Novel Feed Additives in Rabbit Diet: Enterocin Ent M and Durancin Ent ED26E/7, Their Combination, and Effects on Microbiota, Caecal Fermentation, and Enzymatic Activity. Probiotics Antimicrob Proteins 2021. [PMID: 34114193 DOI: 10.1007/s12602-021-09809-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/01/2021] [Indexed: 10/21/2022]
Abstract
The present study investigates the effects of enterocin Ent M and durancin Ent ED26E/7 applied separately and in combination on the intestinal microbiota, caecal enzymatic activity, and fermentaion of rabbits. Eighty rabbits (M91 meatline, aged 5 weeks, both sexes) were divided into groups E (Ent M; 50 µL/animal/day), D (Ent ED26E/7; 50 µL/animal/day), E + D (Ent M + Ent ED26E/7), and control (C). The additives were administered in drinking water for 21 days. Antimicrobial activity of Ent M and Ent ED26E/7 on coliforms (E, E + D: P < 0.001) and pseudomonads (D: P < 0.05) in feces was noted, compared to C. Ent M and Ent ED26E/7 application stimulated caecal enzymatic activity in rabbits. Pectinolytic (E vs. D, E + D: P < 0.01), inulolytic (E vs. E + D: P < 0.01; E vs. C: P < 0.05), and amylolytic (E vs. D, E + D. P < 0.001; E vs. C: P < 0.01) activities were influenced by Ent M, while cellulolytic (D vs. E + D: P < 0.01) and inulolytic (D vs. E + D, C: P < 0.01) activities by Ent ED26E/7 treatment. The cellulolytic and pectinolytic acitivities changed with time. Treatment × time interaction was detected for cellulose and xylan degradation. During Ent M and Ent ED26E/7 treatment, increased ammonia, lactic, butyric and iso-valeric acid, and lower acetic, propionic, iso-butyric, valeric, and caproic acid concentrations were noted. It can be concluded that Ent M and Ent ED26E/7 application can improve rabbit health due to reduced spoilage microbiota and enhanced caecal enzymatic activity.
Collapse
|
7
|
Kang CB, Li XW, Hou SY, Chi XQ, Shan HF, Zhang QJ, Li XB, Zhang J, Liu TJ. Preoperatively predicting the pathological types of acute appendicitis using machine learning based on peripheral blood biomarkers and clinical features: a retrospective study. Ann Transl Med 2021; 9:835. [PMID: 34164469 PMCID: PMC8184413 DOI: 10.21037/atm-20-7883] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Background This study aimed to establish machine learning models for preoperative prediction of the pathological types of acute appendicitis. Methods Based on histopathology, 136 patients with acute appendicitis were included and divided into three types: acute simple appendicitis (SA, n=8), acute purulent appendicitis (PA, n=104), and acute gangrenous or perforated appendicitis (GPA, n=24). Patients with SA/PA and PA/GPA were divided into training (70%) and testing (30%) sets. Statistically significant features (P<0.05) for pathology prediction were selected by univariate analysis. According to clinical and laboratory data, machine learning logistic regression (LR) models were built. Area under receiver operating characteristic curve (AUC) was used for model assessment. Results Nausea and vomiting, abdominal pain time, neutrophils (NE), CD4+ T cell, helper T cell, B lymphocyte, natural killer (NK) cell counts, and CD4+/CD8+ ratio were selected features for the SA/PA group (P<0.05). Nausea and vomiting, abdominal pain time, the highest temperature, CD8+ T cell, procalcitonin (PCT), and C-reactive protein (CRP) were selected features for the PA/GPA group (P<0.05). By using LR models, the blood markers can distinguish SA and PA (training AUC =0.904, testing AUC =0.910). To introduce additional clinical features, the AUC for the testing set increased to 0.926. In the PA/GPA prediction model, AUC with blood biomarkers was 0.834 for the training and 0.821 for the testing set. Combining with clinical features, the AUC for the testing set increased to 0.854. Conclusions Peripheral blood biomarkers can predict the pathological type of SA from PA and GPA. Introducing clinical symptoms could further improve the prediction performance.
Collapse
Affiliation(s)
- Chun-Bo Kang
- Department of General Surgery, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Xiao-Wei Li
- Department of General Surgery, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Shi-Yang Hou
- Department of General Surgery, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Xiao-Qian Chi
- Department of General Surgery, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Hai-Feng Shan
- Department of General Surgery, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Qi-Jun Zhang
- Department of General Surgery, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Xu-Bin Li
- Department of General Surgery, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Jie Zhang
- Department of General Surgery, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Tie-Jun Liu
- Department of General Surgery, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| |
Collapse
|
8
|
Prados A, Onder L, Cheng HW, Mörbe U, Lütge M, Gil-Cruz C, Perez-Shibayama C, Koliaraki V, Ludewig B, Kollias G. Fibroblastic reticular cell lineage convergence in Peyer's patches governs intestinal immunity. Nat Immunol 2021; 22:510-519. [PMID: 33707780 PMCID: PMC7610542 DOI: 10.1038/s41590-021-00894-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 02/03/2021] [Indexed: 12/13/2022]
Abstract
Fibroblastic reticular cells (FRCs) determine the organization of lymphoid organs and control immune cell interactions. While the cellular and molecular mechanisms underlying FRC differentiation in lymph nodes and the splenic white pulp have been elaborated to some extent, in Peyer's patches (PPs) they remain elusive. Using a combination of single-cell transcriptomics and cell fate mapping in advanced mouse models, we found that PP formation in the mouse embryo is initiated by an expansion of perivascular FRC precursors, followed by FRC differentiation from subepithelial progenitors. Single-cell transcriptomics and cell fate mapping confirmed the convergence of perivascular and subepithelial FRC lineages. Furthermore, lineage-specific loss- and gain-of-function approaches revealed that the two FRC lineages synergistically direct PP organization, maintain intestinal microbiome homeostasis and control anticoronavirus immune responses in the gut. Collectively, this study reveals a distinct mosaic patterning program that generates key stromal cell infrastructures for the control of intestinal immunity.
Collapse
MESH Headings
- Animals
- Cell Communication
- Cell Lineage
- Cells, Cultured
- Coronavirus Infections/immunology
- Coronavirus Infections/metabolism
- Coronavirus Infections/virology
- Disease Models, Animal
- Fibroblasts/immunology
- Fibroblasts/metabolism
- Gastrointestinal Microbiome
- Gene Expression Profiling
- Gene Expression Regulation, Developmental
- Host-Pathogen Interactions
- Immunity, Mucosal
- Intestinal Mucosa/immunology
- Intestinal Mucosa/metabolism
- Intestinal Mucosa/microbiology
- Intestinal Mucosa/virology
- Intestine, Small/immunology
- Intestine, Small/metabolism
- Intestine, Small/microbiology
- Intestine, Small/virology
- Mice, Inbred C57BL
- Mice, Knockout
- Murine hepatitis virus/immunology
- Murine hepatitis virus/pathogenicity
- Peyer's Patches/immunology
- Peyer's Patches/metabolism
- Peyer's Patches/microbiology
- Peyer's Patches/virology
- Phenotype
- Single-Cell Analysis
- Transcriptome
- Mice
Collapse
Affiliation(s)
- Alejandro Prados
- Institute for Bioinnovation, BSRC "Alexander Fleming", Vari, Greece
| | - Lucas Onder
- Institute of Immunobiology, Kantonsspital St Gallen, St Gallen, Switzerland
| | - Hung-Wei Cheng
- Institute of Immunobiology, Kantonsspital St Gallen, St Gallen, Switzerland
| | - Urs Mörbe
- Institute of Immunobiology, Kantonsspital St Gallen, St Gallen, Switzerland
| | - Mechthild Lütge
- Institute of Immunobiology, Kantonsspital St Gallen, St Gallen, Switzerland
| | - Cristina Gil-Cruz
- Institute of Immunobiology, Kantonsspital St Gallen, St Gallen, Switzerland
| | | | | | - Burkhard Ludewig
- Institute of Immunobiology, Kantonsspital St Gallen, St Gallen, Switzerland.
- Institute of Experimental Immunology, University of Zürich, Zürich, Switzerland.
| | - George Kollias
- Institute for Bioinnovation, BSRC "Alexander Fleming", Vari, Greece.
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
| |
Collapse
|
9
|
Wang C, Huang L, Wang P, Liu Q, Wang J. The Effects of Deoxynivalenol on the Ultrastructure of the Sacculus Rotundus and Vermiform Appendix, as Well as the Intestinal Microbiota of Weaned Rabbits. Toxins (Basel) 2020; 12:toxins12090569. [PMID: 32899719 PMCID: PMC7551620 DOI: 10.3390/toxins12090569] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 02/07/2023] Open
Abstract
Deoxynivalenol (DON) is a mycotoxin found in grains that poses a potential threat to human and animal health, and the gastrointestinal tract is the primary target organ. There are few studies focused on the toxicology of DON to rabbits, especially on the relation among DON, microbiota, and the gut-associated lymphoid tissue. A total of 30 weaned rabbits (35 d) were evenly divided into the control group and DON group (1.5 mg/kg bodyweight (BW)) based on their body weight. After a 24-day trial, the ultrastructures of the sacculus rotundus and vermiform appendix were observed using a scanning electron microscope and transmission electron microscopy. The morphology and microflora in the ileum, caecum, and colon were also examined. The results proved that the ultrastructure of the sacculus rotundus and vermiform appendix, as well as the integrity of the intestinal barrier (especially for the ileum), were impaired after DON was administrated to the rabbits. Compared to the control group, the relative abundance and diversity of the microflora decreased in all three intestinal segments in the DON group, particularly in the ileum and caecum. In conclusion, the toxic effect of DON on weaned rabbits may be performed by destroying the structure of the sacculus rotundus and vermiform appendix, as well as affecting the structure and diversity of the intestinal flora.
Collapse
Affiliation(s)
- Chunyang Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Taian 271018, China; (C.W.); (L.H.); (P.W.); (Q.L.)
| | - Libo Huang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Taian 271018, China; (C.W.); (L.H.); (P.W.); (Q.L.)
| | - Pengwei Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Taian 271018, China; (C.W.); (L.H.); (P.W.); (Q.L.)
| | - Quancheng Liu
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Taian 271018, China; (C.W.); (L.H.); (P.W.); (Q.L.)
| | - Jinquan Wang
- Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
- Correspondence: ; Tel.: +86-136-0121-7106
| |
Collapse
|
10
|
Abstract
Parkinson’s disease (PD) has long been considered a brain disease, but studies now point to the gastrointestinal (GI) tract as a potential starting point for PD. In particular, the human vermiform appendix has been implicated in PD. The appendix is a tissue rich in immune cells, serving as part of the gut-associated lymphoid tissue and as a storehouse for the gut microbiome. The functions of the appendix converge with recent evidence demonstrating that gut inflammation and shifts in the microbiome are linked to PD. Some epidemiological studies have linked removal of the appendix to lowered PD risk, though there is controversy among these associations. What is apparent is that there is an abundance of aggregated forms of α-synuclein in the appendix relevant to PD pathology. α-Synuclein pathology is thought to propagate from gut to brain via the vagus nerve, which innervates GI tract locations, including the appendix. Remarkably, α-synuclein aggregates in the appendix occur not only in PD patients, but are also present in healthy individuals. This has led to the proposal that in the appendix α-synuclein aggregates are not unique to PD. Moreover, the molecular events leading to PD and the mechanisms by which α-synuclein aggregates transfers from gut to brain may be identifiable in the human appendix. The influence of the appendix on GI inflammation, autoimmunity, microbiome storage, and the lymphatic system may be yet unexplored mechanisms by which the appendix contributes to PD. Overall, the appendix represents a promising tissue site to advance our understanding of PD pathobiology.
Collapse
Affiliation(s)
- Bryan Killinger
- Department of Neurological Sciences, Rush Medical College, Chicago, IL, USA
| | - Viviane Labrie
- Center for Neurodegenerative Science, Van Andel Research Institute, Grand Rapids, MI, USA.,Division of Psychiatry and Behavioral Medicine, College of Human Medicine, Michigan State University, Grand Rapids, MI, USA
| |
Collapse
|
11
|
Abstract
In recent years, tremendous advances have been made in our ability to characterize complex microbial communities such as the gut microbiota, and numerous surveys of the human gut microbiota have identified countless associations between different compositional attributes of the gut microbiota and adverse health conditions. However, most of these findings in humans are purely correlative and animal models are required for prospective evaluation of such changes as causative factors in disease initiation or progression. As in most fields of biomedical research, microbiota-focused studies are predominantly performed in mouse or rat models. Depending on the field of research and experimental question or objective, non-rodent models may be preferable due to better translatability or an inability to use rodents for various reasons. The following review describes the utility and limitations of several non-rodent model species for research on the microbiota and its influence on host physiology and disease. In an effort to balance the breadth of potential model species with the amount of detail provided, four model species are discussed: zebrafish, dogs, pigs, and rabbits.
Collapse
Affiliation(s)
- Aaron C Ericsson
- Department of Veterinary Pathobiology, University of Missouri, United States of America
| |
Collapse
|
12
|
Mattioli S, Dal Bosco A, Combes S, Moscati L, Crotti S, Cartoni Mancinelli A, Cotozzolo E, Castellini C. Dehydrated Alfalfa and Fresh Grass Supply in Young Rabbits: Effect on Performance and Caecal Microbiota Biodiversity. Animals (Basel) 2019; 9:ani9060341. [PMID: 31212702 PMCID: PMC6616632 DOI: 10.3390/ani9060341] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/31/2019] [Accepted: 06/10/2019] [Indexed: 01/12/2023] Open
Abstract
Simple Summary The weaning of young rabbits is a critical period that is often accompanied by digestive troubles. Innovations in feeding strategy are urgently needed to preserve rabbit health and to reduce the use of antibiotics. We show here that providing dehydrated alfalfa during weaning is a promising solution to manage health status by favoring the establishment of a proper digestive microbiota. Abstract The improvement of rabbit gut microbiota by modifying nutritional components of the feed or favoring its early intake of feed has been previously investigated. The early administration of dehydrated alfalfa (A) or fresh grass (G) for rabbits, during the peri-weaning period (30 and 45 days of age), and their effect on performance and caecal microbiota compared to a standard diet (C) were evaluated. Until 15 days of age, nine litters/group were housed in the maternal cage and milked once per day. From 15 to 30 days, the young rabbits could consume both milk and solid feed (pelleted for C or supplemental feed for A and G). At 30 days of age, the rabbits were weaned and, until 45 days, were kept in single cages following the same dietary protocol. No significant changes were found in the milk intake or the individual weight of young rabbits at 30 and 45 days. The caecal Firmicutes/Bacteroidetes (bacterial phyla ratio) increased with age (from 2.43 to 6.05 on average, at 30 and 45 days). The Ruminococcaceae/Lachinospiraceae (bacterial family ratio) was highest in the A group at both ages, followed by G then C. The early administration of dehydrated alfalfa is a promising solution to improve health status by favoring an appropriate digestive microbiota.
Collapse
Affiliation(s)
- Simona Mattioli
- Department of Agricultural, Environmental and Food Science, University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy.
| | - Alessandro Dal Bosco
- Department of Agricultural, Environmental and Food Science, University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy.
| | - Sylvie Combes
- GenPhySE, Université de Toulouse, INRA, ENVT, 31300 Toulouse, France.
| | - Livia Moscati
- Institute Zooprofilattico Umbria and Marche, Via Gaetano Salvemini 1, 06126 Perugia, Italy.
| | - Silvia Crotti
- Institute Zooprofilattico Umbria and Marche, Via Gaetano Salvemini 1, 06126 Perugia, Italy.
| | - Alice Cartoni Mancinelli
- Department of Agricultural, Environmental and Food Science, University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy.
| | - Elisa Cotozzolo
- Department of Agricultural, Environmental and Food Science, University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy.
| | - Cesare Castellini
- Department of Agricultural, Environmental and Food Science, University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy.
| |
Collapse
|
13
|
Vitetta L, Chen J, Clarke S. The vermiform appendix: an immunological organ sustaining a microbiome inoculum. Clin Sci (Lond) 2019; 133:1-8. [PMID: 30606811 DOI: 10.1042/CS20180956] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 11/29/2018] [Accepted: 12/04/2018] [Indexed: 12/12/2022]
Abstract
The hominoid vermiform appendix has been characterized as a diverticulum of the caecum and describes an entity at the juxtaposition of the colon in the confluence of tanias. The independent development of the lymphoid follicle centres of the appendix is progressed at birth in the presence of the intestinal commensal microbiome, an obligatory prompt for the diversification of intestinal and extra-intestinal mucosal immunological tissue. In the vermiform appendix, this activity is centred on further developing the inventory of primary antibodies and the maturation of T- and B-lymphocyte cells in the follicles within the lymphoid tissue. Furthermore, the columnar epithelia, enterocytes and goblet cells comprise the complement of cells that occupy the lamina propria and muscularis mucosae of the vermiform appendix's mucosa, while macrophages and an abundance of immunoglobulin A and immunoglobulin G generating plasma cells seed the lamina propria Intraepithelial immune cells consisting predominantly of specific CD8+ T regulatory lymphocytes occupy sites in the appendix analogous to those present in the intestinal epithelia of the caecal colon. The complement of bacterial genera concealed in the vermiform appendix is posited extant as a biofilm inoculum of the intestinal commensal microbiome. This facilitates re-inoculation of the proximal colon and to a lesser degree the terminal ilium post an intestinal perturbation such as occurs with daily lifestyle stressors, dietary choices and the short-term administration of antibiotics rather than an infectious fulminant colitis. A plausible appreciation results of the importance of multiple immunological aspects of a healthy vermiform appendix and the provision of a commensal biofilm to the gut that repairs a dysbiotic microbiome contributing to balancing intestinal pro- and anti-inflammatory activity for maintaining homeostasis in the gut. Since the composition of the gut microbiome can vary over the short-term and long-term, it is plausible that the appendix inoculum may be instrumental in maintaining the intestinal microbiome.
Collapse
|
14
|
Liu G, Sun C, Liu H, Li F, Zhu Y, Li F. Effects of dietary supplement of vitamin B6 on growth performance and non-specific immune response of weaned rex rabbits. Journal of Applied Animal Research 2018. [DOI: 10.1080/09712119.2018.1512498] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Gongyan Liu
- College of Animal Science and Technology, Shandong Agricultural University, Tai’an City, People’s Republic of China
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai’an City, People’s Republic of China
| | - Chaoran Sun
- College of Animal Science and Technology, Shandong Agricultural University, Tai’an City, People’s Republic of China
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai’an City, People’s Republic of China
| | - Hongli Liu
- College of Animal Science and Technology, Shandong Agricultural University, Tai’an City, People’s Republic of China
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai’an City, People’s Republic of China
| | - Fan Li
- College of Animal Science and Technology, Shandong Agricultural University, Tai’an City, People’s Republic of China
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai’an City, People’s Republic of China
| | - Yanli Zhu
- College of Animal Science and Technology, Shandong Agricultural University, Tai’an City, People’s Republic of China
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai’an City, People’s Republic of China
| | - Fuchang Li
- College of Animal Science and Technology, Shandong Agricultural University, Tai’an City, People’s Republic of China
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai’an City, People’s Republic of China
| |
Collapse
|
15
|
Chung WS, Lin CL, Hsu CY. Women who had appendectomy have increased risk of systemic lupus erythematosus: a nationwide cohort study. Clin Rheumatol 2018; 37:3009-3016. [PMID: 29971583 DOI: 10.1007/s10067-018-4192-1] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 06/12/2018] [Accepted: 06/25/2018] [Indexed: 12/18/2022]
Abstract
The appendix is involved in immune function, and an appendectomy may alter the immune system. Studies evaluating the relationship between previous appendectomy and the risk of systemic lupus erythematosus (SLE) are lacking. This nationwide cohort study investigated the incidence and risk of SLE in patients who underwent appendectomy. Patients aged > 20 years who received appendectomy from 2000 to 2011 were identified from the National Health Insurance Research Database and assigned to the appendectomy cohort. Patients without appendectomy were randomly selected from the NHIRD and assigned to the control cohort; they were frequency matched to each study patient at a 4:1 ratio by sex, age, and index year. All patients were followed until SLE diagnosis, withdrawal from the National Health Insurance program, or the end of 2011. We used Cox models to estimate the hazard ratio (HR) and 95% confidence interval (CI) to compare the risk of SLE between the appendectomy and control cohorts. From 23.74 million people in the cohort, 80,582 patients undergoing appendectomy and 323,850 patients without appendectomy were followed for 723,438 and 2,931,737 person-years, respectively. The appendectomy cohort had a 2.04-fold higher risk of SLE than the control cohort (adjusted HR = 2.04, 95% CI = 1.52-2.76). Women aged ≤ 49 years who underwent appendectomy had a 2.27-fold higher risk of SLE than the corresponding controls (adjusted HR = 2.27, 95% CI = 1.62-3.19). Women aged ≤ 49 years who underwent appendectomy have a significantly higher risk of SLE.
Collapse
Affiliation(s)
- Wei-Sheng Chung
- Department of Internal Medicine, Taichung Hospital, Ministry of Health and Welfare, No. 199, Section 1, San-Min Road, Taichung, 40343, Taiwan. .,Department of Health Services Administration, China Medical University, Taichung, Taiwan. .,Department of Healthcare Administration, Central Taiwan University of Science and Technology, Taichung, Taiwan.
| | - Cheng-Li Lin
- Management Office for Health Data, China Medical University Hospital, Taichung, Taiwan.,College of Medicine, China Medical University, Taichung, Taiwan
| | - Chung-Y Hsu
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| |
Collapse
|
16
|
Girard-Madoux MJ, Gomez de Agüero M, Ganal-Vonarburg SC, Mooser C, Belz GT, Macpherson AJ, Vivier E. The immunological functions of the Appendix: An example of redundancy? Semin Immunol 2018; 36:31-44. [DOI: 10.1016/j.smim.2018.02.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 02/16/2018] [Indexed: 12/12/2022]
|
17
|
Zhang Y, Cui H, Sun D, Liu L, Xu X. Effects of doe-litter separation on intestinal bacteria, immune response and morphology of suckling rabbits. World Rabbit Sci 2018. [DOI: 10.4995/wrs.2018.5917] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Gut development is stimulated by exposure to microorganisms, especially early-life microbial exposure. This study aimed to investigate whether doe-litter separation, which is performed in many rabbit farms, affects this exposure and therefore inhibits the development of intestinal system in suckling rabbits. Immediately after parturition, Rex rabbit does (n=16) were adjusted to 8 kits per litter and divided into doe-litter separation (DLS) group and doe-litter together (DLT) group based on the conditions of the does. One healthy kit per litter was selected and sacrificed at 7 d, 14 d, 21 d and 28 d of age, and the number of total bacteria, Escherichia coli and Bacteroides-Prevotella, expression of interleukin 6 (IL-6) and interleukin 10 (IL-10) in duodenum and caecum were investigated by real-time polymerase chain reaction. The morphological parameters of duodenum and vermiform appendix were also measured. Our results showed that doe-litter separation affected the number of intestinal bacteria. At 7 d of age, except for caecal Escherichia coli, the number of the investigated bacteria was decreased by doe-litter separation (P<0.05). But 1 wk later, only the number of total bacteria and Bacteroides-Prevotella in caecal content (P<0.05) and Escherichia coli in duodenal content from DLS kits (P<0.05) were still lower than those from DLT kits. After being provided with supplementary food for 7 d, DLS kits had fewer total bacteria in caecal content (P<0.05) and fewer E. coli in duodenal content (P<0.01) than DLT kits. After growing to 28 d of age, kits in DLS group still tended to have fewer total bacteria in caecal content, and expression of IL-10 and secretion of secretory IgA (sIgA) in vermiform appendix in DLS group was obviously lower than kits in DLT group (P<0.05). The villus height:crypt depth ratio in duodenum at 3<sup>rd</sup> wk and 4<sup>th</sup> wk was decreased by DLS (P<0.05). Kits in DLS group had shorter villus height (P<0.05), higher crypt depth (P<0.05) and shorter vermiform appendix (P<0.05) at the end of the trial. Furthermore, separating kits from the doe had a negative effect on their average daily gain at 3<sup>rd</sup> wk and 4<sup>th</sup> wk (P<0.05). Limiting the microbiological contact with the mother during suckling period affected the kits’ intestinal flora and could negatively affect the development of intestinal digestive and immune system and growth performance of kits.
Collapse
|
18
|
Beyaz F, Liman N, Ergün E, Ergün L, Özbek M. Intestinal macrophages in Peyer's patches, sacculus rotundus and appendix of Angora rabbit. Cell Tissue Res 2017; 370:285-95. [PMID: 28766043 DOI: 10.1007/s00441-017-2659-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Accepted: 05/30/2017] [Indexed: 12/14/2022]
Abstract
The largest pool of macrophages in the body is harboured by the intestinal mucosa. As the principal phagocytic component of the immune system, macrophages are essential for maintaining mucosal homeostasis as they prevent commensal bacteria from adhering to mucosal epithelial cells. This study provides a RAM11 immunohistochemical and electron microscopic investigation of the existence, localization and distribution of intestinal macrophages in organized gut-associated lymphoid tissue (GALT), including Peyer's patches (PPs), the sacculus rotundus (SR) and the appendix, in the Angora rabbit. Although rabbit intestinal macrophages did not express the tissue macrophage marker macrosialin (CD68), they expressed RAM11. RAM11-positive intestinal macrophages were mostly localized to the subepithelial dome region, interfollicular area and germinal centres (GCs) of the GALT and the lamina propria or submucosa of the ileum and jejunum devoid of PPs and were also observed in the follicle-associated epithelium of PPs, but not in that of the SR and appendix. RAM11-positive macrophages containing engulfed apoptotic bodies were present in the GCs of the lymphoid follicles in the GALT. Electron microscopy further revealed multiple macrophages containing apoptotic bodies within the GCs of the follicles in the GALT. Some macrophage aggregations were observed in the GC and between the GC and the corona region of the follicles in the SR and appendix. Rabbit intestinal macrophages thus undertake both potent phagocytic activity and the efficient scavenging of apoptotic cells. Immunohistochemical data suggest that RAM11 can be reliably used for the determination of intestinal macrophages in the GALT of rabbits.
Collapse
|
19
|
Haines RA, Urbiztondo RA, Haynes RAH, Simpson E, Niewiesk S, Lairmore MD. Characterization of New Zealand White Rabbit Gut-Associated Lymphoid Tissues and Use as Viral Oncology Animal Model. ILAR J 2017; 57:34-43. [PMID: 27034393 DOI: 10.1093/ilar/ilw004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 01/01/2023] Open
Abstract
Rabbits have served as a valuable animal model for the pathogenesis of various human diseases, including those related to agents that gain entry through the gastrointestinal tract such as human T cell leukemia virus type 1. However, limited information is available regarding the spatial distribution and phenotypic characterization of major rabbit leukocyte populations in mucosa-associated lymphoid tissues. Herein, we describe the spatial distribution and phenotypic characterization of leukocytes from gut-associated lymphoid tissues (GALT) from 12-week-old New Zealand White rabbits. Our data indicate that rabbits have similar distribution of leukocyte subsets as humans, both in the GALT inductive and effector sites and in mesenteric lymph nodes, spleen, and peripheral blood. GALT inductive sites, including appendix, cecal tonsil, Peyer's patches, and ileocecal plaque, had variable B cell/T cell ratios (ranging from 4.0 to 0.8) with a predominance of CD4 T cells within the T cell population in all four tissues. Intraepithelial and lamina propria compartments contained mostly T cells, with CD4 T cells predominating in the lamina propria compartment and CD8 T cells predominating in the intraepithelial compartment. Mesenteric lymph node, peripheral blood, and splenic samples contained approximately equal percentages of B cells and T cells, with a high proportion of CD4 T cells compared with CD8 T cells. Collectively, our data indicate that New Zealand White rabbits are comparable with humans throughout their GALT and support future studies that use the rabbit model to study human gut-associated disease or infectious agents that gain entry by the oral route.
Collapse
Affiliation(s)
- Robyn A Haines
- Robyn A. Haines, DVM, was a PhD student; Rebeccah A. Urbiztondo, DVM, was a Master's student; Rashade A. H. Haynes, PhD, was a postdoctoral fellow; and Elaine Simpson, DVM, was a summer research student in the Department of Veterinary Biosciences at The Ohio State University in Columbus, Ohio. Stefan Niewiesk, PhD, DVM, is professor in the Department of Veterinary Biosciences at The Ohio State University is Columbus, Ohio. Michael D. Lairmore, DVM, PhD, is dean, in the School of Veterinary Medicine at the University of California, Davis in Davis, California
| | - Rebeccah A Urbiztondo
- Robyn A. Haines, DVM, was a PhD student; Rebeccah A. Urbiztondo, DVM, was a Master's student; Rashade A. H. Haynes, PhD, was a postdoctoral fellow; and Elaine Simpson, DVM, was a summer research student in the Department of Veterinary Biosciences at The Ohio State University in Columbus, Ohio. Stefan Niewiesk, PhD, DVM, is professor in the Department of Veterinary Biosciences at The Ohio State University is Columbus, Ohio. Michael D. Lairmore, DVM, PhD, is dean, in the School of Veterinary Medicine at the University of California, Davis in Davis, California
| | - Rashade A H Haynes
- Robyn A. Haines, DVM, was a PhD student; Rebeccah A. Urbiztondo, DVM, was a Master's student; Rashade A. H. Haynes, PhD, was a postdoctoral fellow; and Elaine Simpson, DVM, was a summer research student in the Department of Veterinary Biosciences at The Ohio State University in Columbus, Ohio. Stefan Niewiesk, PhD, DVM, is professor in the Department of Veterinary Biosciences at The Ohio State University is Columbus, Ohio. Michael D. Lairmore, DVM, PhD, is dean, in the School of Veterinary Medicine at the University of California, Davis in Davis, California
| | - Elaine Simpson
- Robyn A. Haines, DVM, was a PhD student; Rebeccah A. Urbiztondo, DVM, was a Master's student; Rashade A. H. Haynes, PhD, was a postdoctoral fellow; and Elaine Simpson, DVM, was a summer research student in the Department of Veterinary Biosciences at The Ohio State University in Columbus, Ohio. Stefan Niewiesk, PhD, DVM, is professor in the Department of Veterinary Biosciences at The Ohio State University is Columbus, Ohio. Michael D. Lairmore, DVM, PhD, is dean, in the School of Veterinary Medicine at the University of California, Davis in Davis, California
| | - Stefan Niewiesk
- Robyn A. Haines, DVM, was a PhD student; Rebeccah A. Urbiztondo, DVM, was a Master's student; Rashade A. H. Haynes, PhD, was a postdoctoral fellow; and Elaine Simpson, DVM, was a summer research student in the Department of Veterinary Biosciences at The Ohio State University in Columbus, Ohio. Stefan Niewiesk, PhD, DVM, is professor in the Department of Veterinary Biosciences at The Ohio State University is Columbus, Ohio. Michael D. Lairmore, DVM, PhD, is dean, in the School of Veterinary Medicine at the University of California, Davis in Davis, California
| | - Michael D Lairmore
- Robyn A. Haines, DVM, was a PhD student; Rebeccah A. Urbiztondo, DVM, was a Master's student; Rashade A. H. Haynes, PhD, was a postdoctoral fellow; and Elaine Simpson, DVM, was a summer research student in the Department of Veterinary Biosciences at The Ohio State University in Columbus, Ohio. Stefan Niewiesk, PhD, DVM, is professor in the Department of Veterinary Biosciences at The Ohio State University is Columbus, Ohio. Michael D. Lairmore, DVM, PhD, is dean, in the School of Veterinary Medicine at the University of California, Davis in Davis, California
| |
Collapse
|
20
|
Combes S, Massip K, Martin O, Furbeyre H, Cauquil L, Pascal G, Bouchez O, Le Floc’h N, Zemb O, Oswald I, Gidenne T. Impact of feed restriction and housing hygiene conditions on specific and inflammatory immune response, the cecal bacterial community and the survival of young rabbits. Animal 2017; 11:854-63. [DOI: 10.1017/s1751731116002007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
|
21
|
Kooij IA, Sahami S, Meijer SL, Buskens CJ, Te Velde AA. The immunology of the vermiform appendix: a review of the literature. Clin Exp Immunol 2016; 186:1-9. [PMID: 27271818 DOI: 10.1111/cei.12821] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [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: 04/11/2016] [Revised: 05/30/2016] [Accepted: 05/31/2016] [Indexed: 12/19/2022] Open
Abstract
This literature review assesses the current knowledge about the immunological aspects of the vermiform appendix in health and disease. An essential part of its immunological function is the interaction with the intestinal bacteria, a trait shown to be preserved during its evolution. The existence of the appendiceal biofilm in particular has proved to have a beneficial effect for the entire gut. In assessing the influence of acute appendicitis and the importance of a normally functioning gut flora, however, multiple immunological aspects point towards the appendix as a priming site for ulcerative colitis. Describing the immunological and microbiotical changes in the appendix during acute and chronic inflammation of the appendix, this review suggests that this association becomes increasingly plausible. Sustained by the distinct composition of cells, molecules and microbiota, as well as by the ever more likely negative correlation between the appendix and ulcerative colitis, the idea of the appendix being a vestigial organ should therefore be discarded.
Collapse
Affiliation(s)
- I A Kooij
- Tytgat Institute for Liver and Intestinal Research, Academic Medical Center, Amsterdam, the Netherlands
| | - S Sahami
- Department of Surgery, Academic Medical Center, Amsterdam, the Netherlands
| | - S L Meijer
- Department of Pathology, Academic Medical Center, Amsterdam, the Netherlands
| | - C J Buskens
- Tytgat Institute for Liver and Intestinal Research, Academic Medical Center, Amsterdam, the Netherlands
| | - A A Te Velde
- Tytgat Institute for Liver and Intestinal Research, Academic Medical Center, Amsterdam, the Netherlands
| |
Collapse
|
22
|
Celia C, Cullere M, Gerencsér Z, Matics Z, Giaccone V, Kovács M, Bónai A, Szendrő Z, Dalle Zotte A. Dietary supplementation of Digestarom® herbal formulation: effect on apparent digestibility, faecal and caecal microbial counts and live performance of growing rabbits. World Rabbit Sci 2016. [DOI: 10.4995/wrs.2016.4069] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
<p>The experiment aimed to study the effect of Digestarom® dietary inclusion (herbal formulation containing a mixture of essential oils, herbs, spices and extracts) on apparent digestibility and digestive ecosystem of growing rabbits, as well as the effects of its supplementation before and after weaning on growth performance. At kindling, rabbit does and litters were divided into 2 dietary groups (51 does/group) and fed either a control diet (C) or a diet supplemented with 300 mg Digestarom®/kg diet (D) until weaning, which occurred at 35 d (before weaning supplementation). Each group was further divided into 3 dietary groups: CC received the control diet and DD received the D diet from 5 to 12 wk of age, and DC were fed with D (from 5 to 8 wk of age) and C diets (from 8 to 12 wk of age) (after weaning supplementation; 54 kits/group). An in vivo digestibility trial and a faecal microbial count were carried out on growing rabbits that received only the C or D diets during the trial. The C group showed higher DM intake than D group (215 vs. 196 g/d; P<0.05). The faecal digestibility of ether extract (75.9 vs. 59.8%; P<0.001), cellulose (25.9 vs. 20.6%; P<0.05) and gross energy (51.8 vs. 49.1%; P<0.05) was higher for C than for D group, whereas that of starch (98.9 vs. 98.8%; P<0.001) and the digestible protein to digestible energy ratio (13.9 vs. 13.2 g digestible protein/MJ digestible energy; P<0.01) was the highest for rabbits fed D diet. Stomach and caecal pH, caecal and faecal microbial counts were independent of the dietary treatment. The only exception was the stomach pH in 8 wk-old rabbits, which had the lowest value in C rabbits (P<0.05). The D supplementation before weaning improved feed conversion ratio throughout the growing phase (4.3 vs. 4.4 for D and C, respectively; P<0.05), whereas significant differences in daily weight gain, feed conversion ratio and mortality were observed only in the first period after weaning. Based on the results obtained, dietary supplementation with Digestarom® does not seem to confirm the positive results previously reported for growing rabbits.</p>
Collapse
|
23
|
Abstract
Animals assemble and maintain a diverse but host-specific gut microbial community. In addition to characteristic microbial compositions along the longitudinal axis of the intestines, discrete bacterial communities form in microhabitats, such as the gut lumen, colonic mucus layers and colonic crypts. In this Review, we examine how the spatial distribution of symbiotic bacteria among physical niches in the gut affects the development and maintenance of a resilient microbial ecosystem. We consider novel hypotheses for how nutrient selection, immune activation and other mechanisms control the biogeography of bacteria in the gut, and we discuss the relevance of this spatial heterogeneity to health and disease.
Collapse
|
24
|
Nowland MH, Brammer DW, Garcia A, Rush HG. Biology and Diseases of Rabbits. Laboratory Animal Medicine 2015. [PMCID: PMC7150064 DOI: 10.1016/b978-0-12-409527-4.00010-9] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Beginning in 1931, an inbred rabbit colony was developed at the Phipps Institute for the Study, Treatment and Prevention of Tuberculosis at the University of Pennsylvania. This colony was used to study natural resistance to infection with tuberculosis (Robertson et al., 1966). Other inbred colonies or well-defined breeding colonies were also developed at the University of Illinois College of Medicine Center for Genetics, the Laboratories of the International Health Division of The Rockefeller Foundation, the University of Utrecht in the Netherlands, and Jackson Laboratories. These colonies were moved or closed in the years to follow. Since 1973, the U.S. Department of Agriculture has reported the total number of certain species of animals used by registered research facilities (1997). In 1973, 447,570 rabbits were used in research. There has been an overall decrease in numbers of rabbits used. This decreasing trend started in the mid-1990s. In 2010, 210,172 rabbits were used in research. Despite the overall drop in the number used in research, the rabbit is still a valuable model and tool for many disciplines.
Collapse
|
25
|
Zhai SK, Volgina VV, Sethupathi P, Knight KL, Lanning DK. Chemokine-mediated B cell trafficking during early rabbit GALT development. J Immunol 2014; 193:5951-9. [PMID: 25385821 DOI: 10.4049/jimmunol.1302575] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Microbial and host cell interactions stimulate rabbit B cells to diversify the primary Ab repertoire in GALT. B cells at the base of appendix follicles begin proliferating and diversifying their V-(D)-J genes around 1 wk of age, ∼5 d after B cells first begin entering appendix follicles. To gain insight into the microbial and host cell interactions that stimulate B cells to diversify the primary Ab repertoire, we analyzed B cell trafficking within follicles during the first week of life. We visualized B cells, as well as chemokines that mediate B cell homing in lymphoid tissues, by in situ hybridization, and we examined B cell chemokine receptor expression by flow cytometry. We found that B cells were activated and began downregulating their BCRs well before a detectable B cell proliferative region appeared at the follicle base. The proliferative region was similar to germinal center dark zones, in that it exhibited elevated CXCL12 mRNA expression, and B cells that upregulated CXCR4 mRNA in response to signals acquired from selected intestinal commensals localized in this region. Our results suggest that after entering appendix follicles, B cells home sequentially to the follicle-associated epithelium, the follicular dendritic cell network, the B cell/T cell boundary, and, ultimately, the base of the follicle, where they enter a proliferative program and diversify the primary Ab repertoire.
Collapse
Affiliation(s)
- Shi-Kang Zhai
- Department of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153
| | - Veronica V Volgina
- Department of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153
| | - Periannan Sethupathi
- Department of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153
| | - Katherine L Knight
- Department of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153
| | - Dennis K Lanning
- Department of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153
| |
Collapse
|
26
|
Kubikova E, Sivakova I, Perzelova A. Atypical localization of myenteric ganglia in the human appendical wall: a comparative study with animal appendix. Biologia (Bratisl) 2014; 69:931-935. [DOI: 10.2478/s11756-014-0389-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
27
|
Zhu YL, Wang CY, Wang XP, Li B, Sun LZ, Li FC. Effects of dietary fiber and starch levels on the non-specific immune response of growing rabbits. Livest Sci 2013; 155:285-93. [DOI: 10.1016/j.livsci.2013.04.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
28
|
Combes S, Fortun-Lamothe L, Cauquil L, Gidenne T. Engineering the rabbit digestive ecosystem to improve digestive health and efficacy. Animal 2013; 7:1429-39. [PMID: 23769161 DOI: 10.1017/S1751731113001079] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
In rabbits, the bacterial and archaeal community of caecal ecosystem is composed mostly of species not yet described and very specific to that species. In mammals, the digestive ecosystem plays important physiological roles: hydrolysis and fermentation of nutrients, immune system regulation, angiogenesis, gut development and acting as a barrier against pathogens. Understanding the functioning of the digestive ecosystem and how to control its functional and specific diversity is a priority, as this could provide new strategies to improve the resistance of the young rabbit to digestive disorders and improve feed efficiency. This review first recalls some facts about the specificity of rabbit digestive microbiota composition in the main fermentation compartment, and its variability with some new insights based on recent molecular approaches. The main functions of the digestive microbiota will then be explained. Finally, some possible ways to control rabbit caecal microbiota will be proposed and a suitable timing for action will be defined.
Collapse
|
29
|
Abstract
Artiodactyls possess GALT that appears in fetal life and is located at the extreme end of the ileum. These IPP contain mostly B cells and involute early in postnatal life. Rabbits have a similarly located lymphoid organ, called the sacculus rotundus. Studies in sheep and rabbits have led to the concept that the lower hindgut GALT represents primary lymphoid tissue for B cells and is necessary for normal B cell development, analogous to the bursa of Fabricius. This review traces the history of the observations and theories that have led to the existing concept concerning the role of lower GALT. We then review recent data from piglets with resected IPP that challenges the concept that the IPP is primary B cell lymphoid tissue and that artiodactyls and rabbits are members of the GALT group in the same context as gallinaceous birds. Eliminating the IPP as the primary lymphoid tissue for B cells leads to the hypothesis that the IPP acts as first-responder mucosal lymphoid tissue.
Collapse
Affiliation(s)
- John E Butler
- Institute of Microbiology AS CR, v.v.i., Doly 183, 54922 Novy Hradek, Czech Republic.
| | | |
Collapse
|
30
|
Sano H, Nagata K, Kato K, Kanai K, Yamamoto K, Okuno K, Kuwamoto S, Higaki-Mori H, Sugihara H, Kato M, Murakami I, Kanzaki S, Hayashi K. EBNA-2 -deleted Epstein-Barr virus from P3HR-1 can infect rabbits with lower efficiency than prototype Epstein-Barr virus from B95-8. Intervirology 2013; 56:114-21. [PMID: 23295915 DOI: 10.1159/000343753] [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] [Received: 05/07/2012] [Accepted: 09/17/2012] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES To clarify characteristics on rabbit in vivo infection with type 2 EBV nuclear antigen (EBNA-2)-deleted Epstein-Barr virus (P3HR-1-EBV) and compare infectious efficacy of P3HR-1-EBV with previously reported prototype type 1 EBV from B95-8. METHODS Twelve Japanese White rabbits were inoculated with P3HR-1-EBV via intranasal or intravenous routes and autopsied on day 70-84. RESULTS In only 2 of 12 P3HR-1-EBV-inoculated rabbits, EBV-DNA was detected in peripheral blood mononuclear cells (PBMCs). BamHI M rightward reading frame (BMRF)-1, EBNA-1 and BamHI Z leftward reading frame (BZLF)-1-mRNA were intermittently expressed in PBMCs. In 1 infected rabbit with continuous detection of EBV-DNA in PBMCs, many EBER-1-positive lymphocytes were observed in germinal centers and/or marginal zones in some follicles of the appendix, and for the first time a lymphocyte with EBER-1 expression infiltrating in the squamous cell layer of the tonsils was found. The other rabbit with a transient detection of EBV-DNA in PBMCs had no EBER-1-positive lymphocytes in the tissues examined. Few EBER-1-positive lymphocytes were detected in some rabbits without detection of EBV-DNA in PBMCs. CONCLUSIONS P3HR-1-EBV showed less efficient infection in rabbits than EBV from the B95-8 cell line. However, a P3HR-1-EBV-inoculated animal model is meaningful because this is the first study of EBNA-2 function on in vivo EBV infection and it demonstrated the in vivo infectivity with lytic-type infection by EBNA-2-deleted EBV.
Collapse
Affiliation(s)
- Hitoshi Sano
- Division of Molecular Pathology, Faculty of Medicine, Tottori University, Tottori, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Zhai SK, Lanning DK. Diversification of the primary antibody repertoire begins during early follicle development in the rabbit appendix. Mol Immunol 2013; 54:140-7. [PMID: 23270685 DOI: 10.1016/j.molimm.2012.11.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 11/12/2012] [Accepted: 11/12/2012] [Indexed: 11/20/2022]
Abstract
Rabbits generate a diversified primary antibody repertoire by somatically mutating, in gut-associated lymphoid tissue (GALT), an initial repertoire that is limited by preferential rearrangement of the 3'-most IGVH gene segment. To determine when repertoire diversification begins in GALT, we performed in situ hybridization on neonatal rabbit appendix sections with an activation-induced cytidine deaminase (AID) riboprobe, because AID is required for the mutational processes that diversify the primary antibody repertoire. We first detected AID mRNA expression around 1 week of age, in the basal region of developing follicles. By PCR-amplifying V-D-J genes from AID mRNA(+) B cells isolated by laser capture microdissection, we found evidence of somatic hypermutation, and one likely instance of somatic gene conversion. Our results suggest that V-(D)-J gene diversification begins during early postnatal appendix development, in B cells stimulated to enter a proliferative program by signals derived from select intestinal commensals.
Collapse
|
32
|
Abstract
This review is aimed at readers seeking an introductory overview, teaching courses and interested in visionary ideas. It first describes the range of topics covered by evolutionary medicine, which include human genetic variation, mismatches to modernity, reproductive medicine, degenerative disease, host-pathogen interactions and insights from comparisons with other species. It then discusses priorities for translational research, basic research and health management. Its conclusions are that evolutionary thinking should not displace other approaches to medical science, such as molecular medicine and cell and developmental biology, but that evolutionary insights can combine with and complement established approaches to reduce suffering and save lives. Because we are on the cusp of so much new research and innovative insights, it is hard to estimate how much impact evolutionary thinking will have on medicine, but it is already clear that its potential is enormous.
Collapse
Affiliation(s)
- Stephen C Stearns
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520-8106, USA.
| |
Collapse
|
33
|
Abstract
The effects of B cell-activating factor belonging to the TNF family (BAFF) on B cell maturation and survival in the mouse are relatively well understood. In contrast, little is known about the role of BAFF in B cell development in other mammals, such as rabbits, that use GALT to develop and maintain the B cell compartment. We examined the expression and requirement of BAFF and a proliferation-inducing ligand (APRIL) during peripheral B cell development in young rabbits. By neutralizing BAFF and APRIL in neonates with a soluble decoy receptor, transmembrane activator calcium modulator and cyclophilin ligand interactor-Fc, we found a marked reduction in the number of peripheral B cells, but found no change in the bone marrow (BM) compartment. In the appendix, the size and number of proliferating B cell follicles were greatly reduced, demonstrating that although BAFF/APRIL is dispensable for B cell development in BM, it is required for B cell development in GALT. We found that all rabbit B cells expressed BAFF receptor 3, but did not bind rBAFF, suggesting that the BAFF-binding receptors (BBRs) are bound by endogenous soluble BAFF. Further, we found that B cells themselves express BAFF, suggesting that the soluble BAFF bound to BBRs may be endogenously produced and stimulate B cells in an autocrine fashion. Additionally, we propose that this chronic occupancy of BBRs on B cells may provide a tonic and/or survival signal for the maintenance of peripheral B cells in adults after B lymphopoiesis is arrested in BM.
Collapse
Affiliation(s)
- Venkata A Yeramilli
- Department of Microbiology and Immunology, Strich School of Medicine, Loyola University Chicago, Maywood, IL 60153, USA
| | | |
Collapse
|