1
|
Quin C, DeJong EN, Cook EK, Luo YZ, Vlasschaert C, Sadh S, McNaughton AJ, Buttigieg MM, Breznik JA, Kennedy AE, Zhao K, Mewburn J, Dunham-Snary KJ, Hindmarch CC, Bick AG, Archer SL, Rauh MJ, Bowdish DM. Neutrophil-mediated innate immune resistance to bacterial pneumonia is dependent on Tet2 function. J Clin Invest 2024:e171002. [PMID: 38573824 DOI: 10.1172/jci171002] [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] [Indexed: 04/06/2024] Open
Abstract
Individuals with clonal hematopoiesis of indeterminate potential (CHIP) are at increased risk of aging related health conditions and all-cause mortality, but whether CHIP impacts risk of infection is much less clear. Using UK Biobank data, we revealed a positive association between CHIP and incident pneumonia in 438,421 individuals. We show that inflammation enhanced pneumonia risk, as CHIP carriers with a hypomorphic IL6 receptor polymorphism were protected. To better characterize the pathways of susceptibility, we challenged hematopoietic Tet Methylcytosine Dioxygenase 2 knockout (Tet2-/-) and floxed control mice (Tet2f/f) with Streptococcus pneumoniae. As with human CHIP carriers, Tet2-/- mice had hematopoietic abnormalities resulting in the expansion of inflammatory monocytes and neutrophils in peripheral blood. Yet, these cells were insufficient in defending against S. pneumoniae and resulted in increased pathology, impaired bacterial clearance, and higher mortality in Tet2-/- mice. We delineated the transcriptional landscape of Tet2-/- neutrophils and found that while inflammation-related pathways were upregulated in Tet2-/- neutrophils, migration and motility pathways were compromised. Using live-imaging techniques, we demonstrated impairments in motility, pathogen uptake and neutrophil extracellular trap (NET) formation by Tet2-/- neutrophils. Collectively, we show that CHIP is a risk factor for bacterial pneumonia related to innate immune impairments.
Collapse
Affiliation(s)
- Candice Quin
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Canada
| | - Erica N DeJong
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Canada
| | - Elina K Cook
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, Canada
| | - Yi Zhen Luo
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, Canada
| | - Caitlyn Vlasschaert
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, Canada
| | - Sanathan Sadh
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, Canada
| | - Amy Jm McNaughton
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, Canada
| | - Marco M Buttigieg
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, Canada
| | - Jessica A Breznik
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Canada
| | - Allison E Kennedy
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Canada
| | - Kevin Zhao
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Canada
| | - Jeffrey Mewburn
- Department of Medicine, Queen's University, Kingston, Canada
| | | | | | - Alexander G Bick
- Division of Genetic Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, United States of America
| | | | - Michael J Rauh
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, Canada
| | - Dawn Me Bowdish
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Canada
| |
Collapse
|
2
|
Abstract
A growing body of evidence suggests that the environment is an important source of colonizing bacteria for the gastrointestinal tract of C-section delivered infants, who undergo multiple birth-related interventions; however, the extent to which environmental microbes impact vaginally delivered infants remains unclear. Here we investigated the impact of rural and urban environmental exposures on microbial establishment and immunity in vaginally delivered mice. We simulated rural and urban home environments by adding soil types to cages from breeding to weaning. Our aims were to determine the impact of rural and urban soil exposures on the gut microbiome in young mice and to understand whether these changes persisted into adulthood. Host immune cytokines and microbial short-chain fatty acids were quantified to understand the impact on immunity. We found that early-life soil exposure had a minor effect on the richness of the neonatal gut microbiota contributing 5% and 9% variation in the bacterial community structure between mice during early-life and adulthood, respectively. Exposure to urban soil increased Clostridiaceae and propionic acid which persisted into adulthood. While soil exposure had a limited effect on the gut taxa, systemic cytokine and chemokine profiles were altered in adulthood. The findings presented here show that unlike in C-section deliveries previously reported, environmental exposures following a natural birth have a limited impact on the gut microbial taxa but potentially play an important role in immune-mediated disease susceptibility later in life.
Collapse
Affiliation(s)
| | | | | | | | - Miranda Hart
- Department of Biology, Okanagan Campus, Canada,Deanna L. Gibson Department of Biology, The Irving K. Barber School of Arts and Sciences, University of British Columbia, Room ASC 368, 3187 University Way, Okanagan Campus, Kelowna, British Columbia, V1V 1V7 Canada
| | - Deanna L. Gibson
- Department of Biology, Okanagan Campus, Canada,Department of Medicine, Faculty of Medicine, University of British Columbia, Kelowna, Canada,CONTACT Miranda Hart
| |
Collapse
|
3
|
Graef FA, Celiberto LS, Allaire JM, Kuan MTY, Bosman ES, Crowley SM, Yang H, Chan JH, Stahl M, Yu H, Quin C, Gibson DL, Verdu EF, Jacobson K, Vallance BA. Fasting increases microbiome-based colonization resistance and reduces host inflammatory responses during an enteric bacterial infection. PLoS Pathog 2021; 17:e1009719. [PMID: 34352037 PMCID: PMC8341583 DOI: 10.1371/journal.ppat.1009719] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 01/08/2021] [Accepted: 06/15/2021] [Indexed: 01/04/2023] Open
Abstract
Reducing food intake is a common host response to infection, yet it remains unclear whether fasting is detrimental or beneficial to an infected host. Despite the gastrointestinal tract being the primary site of nutrient uptake and a common route for infection, studies have yet to examine how fasting alters the host's response to an enteric infection. To test this, mice were fasted before and during oral infection with the invasive bacterium Salmonella enterica serovar Typhimurium. Fasting dramatically interrupted infection and subsequent gastroenteritis by suppressing Salmonella's SPI-1 virulence program, preventing invasion of the gut epithelium. Virulence suppression depended on the gut microbiota, as Salmonella's invasion of the epithelium proceeded in fasting gnotobiotic mice. Despite Salmonella's restored virulence within the intestines of gnotobiotic mice, fasting downregulated pro-inflammatory signaling, greatly reducing intestinal pathology. Our study highlights how food intake controls the complex relationship between host, pathogen and gut microbiota during an enteric infection.
Collapse
Affiliation(s)
- Franziska A. Graef
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Larissa S. Celiberto
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Joannie M. Allaire
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mimi T. Y. Kuan
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Else S. Bosman
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Shauna M. Crowley
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Hyungjun Yang
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Justin H. Chan
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Martin Stahl
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Hongbing Yu
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Candice Quin
- Department of Biology, University of British Columbia, Kelowna, British Columbia, Canada
| | - Deanna L. Gibson
- Department of Biology, University of British Columbia, Kelowna, British Columbia, Canada
| | - Elena F. Verdu
- Farncombe Institute, McMaster University, Hamilton, Ontario, Canada
| | - Kevan Jacobson
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Bruce A. Vallance
- Department of Pediatrics, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| |
Collapse
|
4
|
Quin C, Ghosh S, Dai C, Barnett JA, Garner AM, Yoo RKH, Zandberg WF, Botta A, Gorzelak MA, Gibson DL. Back Cover: Maternal Intake of Dietary Fat Pre‐Programs Offspring's Gut Ecosystem Altering Colonization Resistance and Immunity to Infectious Colitis in Mice. Mol Nutr Food Res 2021. [DOI: 10.1002/mnfr.202170014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
5
|
Quin C, Ghosh S, Dai C, Barnett JA, Garner AM, Yoo RKH, Zandberg WF, Botta A, Gorzelak MA, Gibson DL. Maternal Intake of Dietary Fat Pre-Programs Offspring's Gut Ecosystem Altering Colonization Resistance and Immunity to Infectious Colitis in Mice. Mol Nutr Food Res 2021; 65:e2000635. [PMID: 33559319 DOI: 10.1002/mnfr.202000635] [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: 07/03/2020] [Revised: 01/02/2021] [Indexed: 11/10/2022]
Abstract
SCOPE The transgenerational impact of dietary fat remains unclear. Here, the role of maternal fat consumption as a modulator of gut microbial communities and infectious disease outcomes in their offspring is explored. METHODS AND RESULTS C57BL/6 mice are fed isocaloric high-fat diets throughout breeding, gestation and lactation. Diets contained either milk fat (MF), olive oil (OO) or corn oil (CO), with or without fish oil. The pups born to maternally exposed mice are weaned on to chow and raised into adulthood. At 8 weeks, the offsprings are either euthanized for colonic 16S rRNA analysis or challenged with the enteric pathogen, Citrobacter rodentium. Maternal CO exposure resulted in unique clustering of bacterial communities in offspring compared with MF and OO. Diets rich in CO reduced survival in offspring challenged with C. rodentium. The addition of fish oil did not improve mortality caused by CO and worsened disease outcomes when combined with OO. Unlike the unsaturated diets, MF is protective with and without fish oil. CONCLUSIONS Overall, these data reveal that maternal intake of fatty acids do have transgenerational impacts on their offspring's bacteriome and enteric infection risk. Based on this study, saturated fats should be included in maternal diets.
Collapse
Affiliation(s)
- Candice Quin
- Department of Biology Okanagan campus, University of British Columbia, Kelowna, British Columbia, Canada
| | - Sanjoy Ghosh
- Department of Biology Okanagan campus, University of British Columbia, Kelowna, British Columbia, Canada
| | - Chuanbin Dai
- Department of Biology Okanagan campus, University of British Columbia, Kelowna, British Columbia, Canada
| | - Jacqueline A Barnett
- Department of Biology Okanagan campus, University of British Columbia, Kelowna, British Columbia, Canada
| | - Alexander M Garner
- Department of Chemistry Okanagan campus, University of British Columbia, Kelowna, British Columbia, Canada
| | - Rachael K H Yoo
- Department of Chemistry Okanagan campus, University of British Columbia, Kelowna, British Columbia, Canada
| | - Wesley F Zandberg
- Department of Chemistry Okanagan campus, University of British Columbia, Kelowna, British Columbia, Canada
| | - Amy Botta
- Department of Biology Okanagan campus, University of British Columbia, Kelowna, British Columbia, Canada
| | - Monika A Gorzelak
- Department of Biology Okanagan campus, University of British Columbia, Kelowna, British Columbia, Canada
| | - Deanna L Gibson
- Department of Biology Okanagan campus, University of British Columbia, Kelowna, British Columbia, Canada
- Department of Medicine, Faculty of Medicine, University of British Columbia, Kelowna, British Columbia, Canada
| |
Collapse
|
6
|
Abstract
Colonization of the gastrointestinal tract with microorganisms during infancy represents a critical control point for shaping life-long immune-mediated disease susceptibility. Abnormal colonization or an imbalance of microbes, termed dysbiosis, is implicated in several diseases. Consequently, recent research has aimed at understanding ways to manipulate a dysbiotic microbiome during infancy to resemble a normal, healthy microbiome. However, one of the fundamental issues in microbiome research is characterizing what a "normal" infant microbiome is based on geography, ethnicity and cultural variations. This review provides a comprehensive account of what is currently known about the infant microbiome from a global context. In general, this review shows that the influence of cultural variations in feeding practices, delivery modes and hygiene are the biggest contributors to microbial variability. Despite geography or race, all humans have similar microbial succession during infancy.
Collapse
Affiliation(s)
- Candice Quin
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Deanna L. Gibson
- Department of Biology, University of British Columbia, Kelowna, Canada,Department of Medicine, University of British Columbia, Kelowna, Canada,CONTACT Deanna L. Gibson Department of Biology, University of British Columbia, Okanagan Campus, ASC 386, 3187 University Way, Kelowna, BCV1V 1V7, Canada
| |
Collapse
|
7
|
Quin C, Vollman DM, Ghosh S, Haskey N, Estaki M, Pither J, Barnett JA, Jay MN, Birnie BW, Gibson DL. Fish oil supplementation reduces maternal defensive inflammation and predicts a gut bacteriome with reduced immune priming capacity in infants. ISME J 2020; 14:2090-2104. [PMID: 32398661 PMCID: PMC7368083 DOI: 10.1038/s41396-020-0672-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 04/24/2020] [Accepted: 04/29/2020] [Indexed: 12/17/2022]
Abstract
Habitual supplementation of fish oil is thought to provide benefits to the developing infant; however, the effects on infant microbial establishment and immune development are unknown. A 6-month observational cohort study was conducted where 47 out of 91 women self-administered dietary fish oil during breastfeeding. Infant stool and mothers' breast milk were collected each month over 6 months. Gas chromatography was used to quantify breast milk fatty acids and high-throughput sequencing was used to assess the infant fecal microbiota. Immune markers and parent-reported questionnaires were used to assess infant immunity and health up to 2 years. Our results reveal that fish oil supplementation decreased secretory immunoglobulin A and increased IL-10 production in lactating women along with increased breast milk eicosapentaenoic acid, and this corresponded to increased abundances of fecal Bifidobacterium and Lactobacillus spp. in their infants. Docosahexaenoic acid levels in breast milk aligned with decreases in infant gut bacterial richness and the predicted bacterial phenotypes suggested that fish oil lowers commensal traits involved in pathogen colonization resistance. Despite this, there were no differences in sickness incidence in toddlers. This study revealed that fish oil associates with decreases in breast milk defensive inflammatory responses and corresponds with infant fecal microbiota with anti-inflammatory potential.
Collapse
Affiliation(s)
- Candice Quin
- Department of Biology Okanagan Campus, University of British Columbia, Kelowna, BC, Canada
| | - Deanna M Vollman
- Department of Biology Okanagan Campus, University of British Columbia, Kelowna, BC, Canada
| | - Sanjoy Ghosh
- Department of Biology Okanagan Campus, University of British Columbia, Kelowna, BC, Canada
| | - Natasha Haskey
- Department of Biology Okanagan Campus, University of British Columbia, Kelowna, BC, Canada
| | - Mehrbod Estaki
- Department of Biology Okanagan Campus, University of British Columbia, Kelowna, BC, Canada
| | - Jason Pither
- Department of Biology Okanagan Campus, University of British Columbia, Kelowna, BC, Canada
| | - Jacqueline A Barnett
- Department of Biology Okanagan Campus, University of British Columbia, Kelowna, BC, Canada
| | - Michael N Jay
- Department of Biology Okanagan Campus, University of British Columbia, Kelowna, BC, Canada
- Department of Medicine, Faculty of Medicine, University of British Columbia, Kelowna, BC, Canada
| | - Blake W Birnie
- Department of Biology Okanagan Campus, University of British Columbia, Kelowna, BC, Canada
- Department of Medicine, Faculty of Medicine, University of British Columbia, Kelowna, BC, Canada
| | - Deanna L Gibson
- Department of Biology Okanagan Campus, University of British Columbia, Kelowna, BC, Canada.
- Department of Medicine, Faculty of Medicine, University of British Columbia, Kelowna, BC, Canada.
| |
Collapse
|
8
|
Quin C, Vicaretti SD, Mohtarudin NA, Garner AM, Vollman DM, Gibson DL, Zandberg WF. Influence of sulfonated and diet-derived human milk oligosaccharides on the infant microbiome and immune markers. J Biol Chem 2020; 295:4035-4048. [PMID: 32014993 DOI: 10.1074/jbc.ra119.011351] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [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: 10/03/2019] [Revised: 01/23/2020] [Indexed: 12/14/2022] Open
Abstract
Human milk oligosaccharides (HMOs) promote the development of the neonatal intestinal, immune, and nervous systems and has recently received considerable attention. Here we investigated how the maternal diet affects HMO biosynthesis and how any diet-induced HMO alterations influence the infant gut microbiome and immunity. Using capillary electrophoresis and MS-based analyses, we extracted and measured HMOs from breast milk samples and then correlated their levels with results from validated 24-h diet recall surveys and breast milk fatty acids. We found that fruit intake and unsaturated fatty acids in breast milk were positively correlated with an increased absolute abundance of numerous HMOs, including 16 sulfonated HMOs we identified here in humans for the first time. The diet-derived monosaccharide 5-N-glycolyl-neuraminic acid (Neu5Gc) was unambiguously detected in all samples. To gain insights into the potential impact of Neu5Gc on the infant microbiome, we used a constrained ordination approach and identified correlations between Neu5Gc levels and Bacteroides spp. in infant stool. However, Neu5Gc was not associated with marked changes in infant immune markers, in contrast with sulfonated HMOs, whose expression correlated with suppression of two major Th2 cytokines, IL-10 and IL-13. The findings of our work highlight the importance of maternal diet for HMO biosynthesis and provide as yet unexplored targets for future studies investigating interactions between HMOs and the intestinal microbiome and immunity in infants.
Collapse
Affiliation(s)
- Candice Quin
- Department of Biology, I. K. Barber School of Arts and Sciences, University of British Columbia, 1177 Research Road, Kelowna, British Columbia, Canada V1V 1V7
| | - Sara D Vicaretti
- Department of Chemistry, I. K. Barber School of Arts and Sciences, University of British Columbia, 3247 University Way, Kelowna, British Columbia, Canada V1V 1V7
| | - Nina A Mohtarudin
- Department of Biology, I. K. Barber School of Arts and Sciences, University of British Columbia, 1177 Research Road, Kelowna, British Columbia, Canada V1V 1V7
| | - Alexander M Garner
- Department of Biology, I. K. Barber School of Arts and Sciences, University of British Columbia, 1177 Research Road, Kelowna, British Columbia, Canada V1V 1V7
| | - Deanna M Vollman
- Department of Biology, I. K. Barber School of Arts and Sciences, University of British Columbia, 1177 Research Road, Kelowna, British Columbia, Canada V1V 1V7
| | - Deanna L Gibson
- Department of Biology, I. K. Barber School of Arts and Sciences, University of British Columbia, 1177 Research Road, Kelowna, British Columbia, Canada V1V 1V7 .,Department of Medicine, Faculty of Medicine, 317-2194 Health Sciences Mall, Vancouver, British Columbia, Canada V6T 1Z3
| | - Wesley F Zandberg
- Department of Chemistry, I. K. Barber School of Arts and Sciences, University of British Columbia, 3247 University Way, Kelowna, British Columbia, Canada V1V 1V7
| |
Collapse
|
9
|
Quin C, Gibson DL. Dietary Fatty Acids and Host-Microbial Crosstalk in Neonatal Enteric Infection. Nutrients 2019; 11:E2064. [PMID: 31484327 PMCID: PMC6770655 DOI: 10.3390/nu11092064] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/09/2019] [Accepted: 08/20/2019] [Indexed: 12/11/2022] Open
Abstract
Human milk is the best nutritional choice for infants. However, in instances where breastfeeding is not possible, infant formulas are used as alternatives. While formula manufacturers attempt to mimic the performance of human breast milk, formula-fed babies consistently have higher incidences of infection from diarrheal diseases than those breastfed. Differences in disease susceptibility, progression and severity can be attributed, in part, to nutritional fatty acid differences between breast milk and formula. Despite advances in our understanding of breast milk properties, formulas still present major differences in their fatty acid composition when compared to human breast milk. In this review, we highlight the role of distinct types of dietary fatty acids in modulating host inflammation, both directly and through the microbiome-immune nexus. We present evidence that dietary fatty acids influence enteric disease susceptibility and therefore, altering the fatty acid composition in formula may be a potential strategy to improve infectious outcomes in formula-fed infants.
Collapse
Affiliation(s)
- Candice Quin
- Department of Biology, Okanagan Campus, University of British Columbia, Okanagan Campus ASC 386, 3187 University Way, Kelowna, BC V1V 1V7, Canada
| | - Deanna L Gibson
- Department of Biology, Okanagan Campus, University of British Columbia, Okanagan Campus ASC 386, 3187 University Way, Kelowna, BC V1V 1V7, Canada.
- Department of Medicine, Faculty of Medicine, University of British Columbia, Kelowna, BC V1V 1V7, Canada.
| |
Collapse
|
10
|
Abulizi N, Quin C, Brown K, Chan YK, Gill SK, Gibson DL. Gut Mucosal Proteins and Bacteriome Are Shaped by the Saturation Index of Dietary Lipids. Nutrients 2019; 11:nu11020418. [PMID: 30781503 PMCID: PMC6412740 DOI: 10.3390/nu11020418] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 02/01/2019] [Accepted: 02/13/2019] [Indexed: 02/07/2023] Open
Abstract
The dynamics of the tripartite relationship between the host, gut bacteria and diet in the gut is relatively unknown. An imbalance between harmful and protective gut bacteria, termed dysbiosis, has been linked to many diseases and has most often been attributed to high-fat dietary intake. However, we recently clarified that the type of fat, not calories, were important in the development of murine colitis. To further understand the host-microbe dynamic in response to dietary lipids, we fed mice isocaloric high-fat diets containing either milk fat, corn oil or olive oil and performed 16S rRNA gene sequencing of the colon microbiome and mass spectrometry-based relative quantification of the colonic metaproteome. The corn oil diet, rich in omega-6 polyunsaturated fatty acids, increased the potential for pathobiont survival and invasion in an inflamed, oxidized and damaged gut while saturated fatty acids promoted compensatory inflammatory responses involved in tissue healing. We conclude that various lipids uniquely alter the host-microbe interaction in the gut. While high-fat consumption has a distinct impact on the gut microbiota, the type of fatty acids alters the relative microbial abundances and predicted functions. These results support that the type of fat are key to understanding the biological effects of high-fat diets on gut health.
Collapse
Affiliation(s)
- Nijiati Abulizi
- Department of Biology, IKBSAS, University of British Columbia, Okanagan campus, Kelowna V1V 1V7, Canada.
| | - Candice Quin
- Department of Biology, IKBSAS, University of British Columbia, Okanagan campus, Kelowna V1V 1V7, Canada.
| | - Kirsty Brown
- Department of Biology, IKBSAS, University of British Columbia, Okanagan campus, Kelowna V1V 1V7, Canada.
| | - Yee Kwan Chan
- Department of Biology, IKBSAS, University of British Columbia, Okanagan campus, Kelowna V1V 1V7, Canada.
| | - Sandeep K Gill
- Department of Biology, IKBSAS, University of British Columbia, Okanagan campus, Kelowna V1V 1V7, Canada.
| | - Deanna L Gibson
- Department of Biology, IKBSAS, University of British Columbia, Okanagan campus, Kelowna V1V 1V7, Canada.
- Department of Medicine, Faculty of Medicine, University of British Columbia, Vancouver V6T 1Z3, Canada.
| |
Collapse
|
11
|
Anderson SJ, Lockhart JS, Estaki M, Quin C, Hirota SA, Alston L, Buret AG, Hancock TM, Petri B, Gibson DL, Morck DW. Effects of Azithromycin on Behavior, Pathologic Signs, and Changes in Cytokines, Chemokines, and Neutrophil Migration in C57BL/6 Mice Exposed to Dextran Sulfate Sodium. Comp Med 2018; 69:4-15. [PMID: 30545428 DOI: 10.30802/aalas-cm-18-000001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Here we characterized the murine dextran sulfate sodium (DSS) model of acute colitis. Specifically, we evaluated azithromycin and metronidazole treatment regimens to assess their effects on animal wellbeing, pathologic changes, barrier function, cytokine and chemokine profiles, and neutrophil migration in colon tissue. Azithromycin treatment significantly reduced the severity of colitis, as assessed through body weight change, water consumption, macroscopic lesions, and animal behaviors (activity level, climbing, and grooming), but did not alter food consumption or feeding behavior. Mucosal barrier function (evaluated by using FITC-labeled dextran) was decreased after DSS exposure; azithromycin did not significantly alter barrier function in mice with colitis, whereas metronidazole exacerbated the colitis-related deficit in barrier function. In addition, metronidazole appeared to exacerbate disease as assessed through water consumption and animal behaviors (overall activity, climbing, grooming, and drinking) but had no effect on weight loss, macroscopic lesions, or eating behavior. Pathologic changes were typical for DSS treatment. Antibiotic treatment resulted in reduced levels of proinflammatory cytokines and chemokines and decreased neutrophil adhesion and emigration in DSS-exposed mice. The results highlight the importance of clinical and behavioral assessments in addition to laboratory evaluation as tools to evaluate animal welfare and therapeutic efficacy in disease models. Data from this study suggest that azithromycin may convey some benefits in the mouse DSS colitis model through modulation of the immune response, including neutrophil migration into tissues, whereas metronidazole may exacerbate colitis.
Collapse
Affiliation(s)
- Stefanie J Anderson
- Animal Health Unit, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Joey S Lockhart
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Mehrbod Estaki
- Department of Biology, University of British Columbia, Okanagan, Kelowna, British Columbia, Canada
| | - Candice Quin
- Department of Biology, University of British Columbia, Okanagan, Kelowna, British Columbia, Canada
| | - Simon A Hirota
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Laurie Alston
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Andre G Buret
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Trina M Hancock
- Animal Health Unit, University of Calgary, Calgary, Alberta, Canada
| | - Björn Petri
- Department of Microbiology, Immunology, and Infectious Diseases, Department of Physiology and Pharmacology, Mouse Phenomics Resource Laboratory, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Deanna L Gibson
- Department of Biology, University of British Columbia, Okanagan, Kelowna, British Columbia, Canada
| | - Douglas W Morck
- Animal Health Unit, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Department of Biology, University of British Columbia, Okanagan, Kelowna, British Columbia, Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Alberta, Canada;,
| |
Collapse
|
12
|
Quin C, Estaki M, Vollman DM, Barnett JA, Gill SK, Gibson DL. Probiotic supplementation and associated infant gut microbiome and health: a cautionary retrospective clinical comparison. Sci Rep 2018; 8:8283. [PMID: 29844409 PMCID: PMC5974413 DOI: 10.1038/s41598-018-26423-3] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 05/11/2018] [Indexed: 12/11/2022] Open
Abstract
While probiotics are a multi-billion dollar industry, there is little evidence to show that supplementing infants provides any health benefits. We conducted an observational study where 35 of 86 participating mothers self-administered probiotics during breastfeeding, as well as directly to their infants. The primary objective was to determine if probiotic exposure influenced the infants' fecal microbiome while the secondary objective assessed associated changes to the mothers' breast milk immunity and infant health. Analysis of infant fecal microbiome throughout the first 6 months of life revealed that probiotics were associated with higher abundances of Bifidobacterium at week 1 only. Short-chain fatty acid production and predicted metagenomic functions of the microbial communities were not altered. While probiotics did not alter breast milk immune markers, fecal sIgA responses were higher among probiotic supplemented infants. Surprisingly, this was not associated with better health outcomes, as the probiotic cohort had higher incidences of mucosal-associated illnesses as toddlers. This retrospective clinical comparison suggests that probiotic exposure during infancy has limited effects on gut microbial composition yet is associated with increased infection later in life. These correlative findings caution against probiotic supplementation during infancy until rigorous controlled follow-up studies determining their safety and efficacy have occurred.
Collapse
Affiliation(s)
- C Quin
- Department of Biology, University of British Columbia, Okanagan campus, Kelowna, BC, V1V 1V7, Canada
| | - M Estaki
- Department of Biology, University of British Columbia, Okanagan campus, Kelowna, BC, V1V 1V7, Canada
| | - D M Vollman
- Department of Biology, University of British Columbia, Okanagan campus, Kelowna, BC, V1V 1V7, Canada
| | - J A Barnett
- Department of Biology, University of British Columbia, Okanagan campus, Kelowna, BC, V1V 1V7, Canada
| | - S K Gill
- Department of Biology, University of British Columbia, Okanagan campus, Kelowna, BC, V1V 1V7, Canada
| | - D L Gibson
- Department of Biology, University of British Columbia, Okanagan campus, Kelowna, BC, V1V 1V7, Canada.
| |
Collapse
|
13
|
Mulholland L, Quin C, McCoy C, Foden K, Spring S, Rowan S. 20: Pattern of lung cancer referrals to a newly established Acute Oncology Service. Lung Cancer 2017. [DOI: 10.1016/s0169-5002(17)30070-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
14
|
DeCoffe D, Quin C, Gill SK, Tasnim N, Brown K, Godovannyi A, Dai C, Abulizi N, Chan YK, Ghosh S, Gibson DL. Dietary Lipid Type, Rather Than Total Number of Calories, Alters Outcomes of Enteric Infection in Mice. J Infect Dis 2016; 213:1846-56. [PMID: 27067195 DOI: 10.1093/infdis/jiw084] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [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: 09/29/2015] [Accepted: 02/18/2016] [Indexed: 12/19/2022] Open
Abstract
Dietary lipids modulate immunity, yet the means by which specific fatty acids affect infectious disease susceptibility remains unclear. Deciphering lipid-induced immunity is critical to understanding the balance required for protecting against pathogens while avoiding chronic inflammatory diseases. To understand how specific lipids alter susceptibility to enteric infection, we fed mice isocaloric, high-fat diets composed of corn oil (rich in n-6 polyunsaturated fatty acids [n-6 PUFAs]), olive oil (rich in monounsaturated fatty acids), or milk fat (rich in saturated fatty acids) with or without fish oil (rich in n-3 PUFAs). After 5 weeks of dietary intervention, mice were challenged with Citrobacter rodentium, and pathological responses were assessed. Olive oil diets resulted in little colonic pathology associated with intestinal alkaline phosphatase, a mucosal defense factor that detoxifies lipopolysaccharide. In contrast, while both corn oil and milk fat diets resulted in inflammation-induced colonic damage, only milk fat induced compensatory protective responses, including short chain fatty acid production. Fish oil combined with milk fat, unlike unsaturated lipid diets, had a protective effect associated with intestinal alkaline phosphatase activity. Overall, these results reveal that dietary lipid type, independent of the total number of calories associated with the dietary lipid, influences the susceptibility to enteric damage and the benefits of fish oil during infection.
Collapse
Affiliation(s)
- Daniella DeCoffe
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Candice Quin
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Sandeep K Gill
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Nishat Tasnim
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Kirsty Brown
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Artem Godovannyi
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Chuanbin Dai
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Nijiati Abulizi
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Yee Kwan Chan
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Sanjoy Ghosh
- Department of Biology, University of British Columbia, Kelowna, Canada
| | - Deanna L Gibson
- Department of Biology, University of British Columbia, Kelowna, Canada
| |
Collapse
|
15
|
Banati RB, Middleton RJ, Chan R, Hatty CR, Wai-Ying Kam W, Quin C, Graeber MB, Parmar A, Zahra D, Callaghan P, Fok S, Howell NR, Gregoire M, Szabo A, Pham T, Davis E, Liu GJ. Positron emission tomography and functional characterization of a complete PBR/TSPO knockout. Nat Commun 2014; 5:5452. [PMID: 25406832 PMCID: PMC4263137 DOI: 10.1038/ncomms6452] [Citation(s) in RCA: 186] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 10/01/2014] [Indexed: 12/17/2022] Open
Abstract
The evolutionarily conserved peripheral benzodiazepine receptor (PBR), or 18-kDa translocator protein (TSPO), is thought to be essential for cholesterol transport and steroidogenesis, and thus life. TSPO has been proposed as a biomarker of neuroinflammation and a new drug target in neurological diseases ranging from Alzheimer's disease to anxiety. Here we show that global C57BL/6-Tspo(tm1GuWu(GuwiyangWurra))-knockout mice are viable with normal growth, lifespan, cholesterol transport, blood pregnenolone concentration, protoporphyrin IX metabolism, fertility and behaviour. However, while the activation of microglia after neuronal injury appears to be unimpaired, microglia from (GuwiyangWurra)TSPO knockouts produce significantly less ATP, suggesting reduced metabolic activity. Using the isoquinoline PK11195, the ligand originally used for the pharmacological and structural characterization of the PBR/TSPO, and the imidazopyridines CLINDE and PBR111, we demonstrate the utility of (GuwiyangWurra)TSPO knockouts to provide robust data on drug specificity and selectivity, both in vitro and in vivo, as well as the mechanism of action of putative TSPO-targeting drugs.
Collapse
Affiliation(s)
- Richard B. Banati
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
- Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
- Medical Imaging & Radiation Sciences, Faculty of Health Science and Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
- National Imaging Facility, Sydney, Camperdown, New South Wales 2006, Australia
| | - Ryan J. Middleton
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Ronald Chan
- Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
- Medical Imaging & Radiation Sciences, Faculty of Health Science and Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Claire R. Hatty
- Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
- Medical Imaging & Radiation Sciences, Faculty of Health Science and Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Winnie Wai-Ying Kam
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
- Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
- Medical Imaging & Radiation Sciences, Faculty of Health Science and Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Candice Quin
- Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
- Medical Imaging & Radiation Sciences, Faculty of Health Science and Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Manuel B. Graeber
- Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
- Medical Imaging & Radiation Sciences, Faculty of Health Science and Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
- Sydney Medical School, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Arvind Parmar
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - David Zahra
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Paul Callaghan
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Sandra Fok
- Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Nicholas R. Howell
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Marie Gregoire
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Alexander Szabo
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
- Centre for Translational Neuroscience, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Tien Pham
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Emma Davis
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Guo-Jun Liu
- Life Sciences, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
- Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
- Medical Imaging & Radiation Sciences, Faculty of Health Science and Brain & Mind Research Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
| |
Collapse
|
16
|
Quin C, Hartley R. Synthesis of novel nitrone spin-traps for the investigation of oxidative stress. Comp Biochem Physiol A Mol Integr Physiol 2007. [DOI: 10.1016/j.cbpa.2007.01.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
17
|
Hodges E, Quin C, Farrell AM, Christmas S, Sewell HF, Doherty M, Powell RJ, Smith JL. Arthropathy, leucopenia and recurrent infection associated with a TcR gamma delta population. Br J Rheumatol 1995; 34:978-83. [PMID: 7582708 DOI: 10.1093/rheumatology/34.10.978] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
This report documents the presence of clonal gamma delta T-cell receptor (TcR) population in the blood of a patient who presented with an arthropathy of undetermined cause, leucopenia and splenomegaly. There was no evidence for lymphoid malignancy clinically or at post-mortem. The phenotype and genotype of the clonal T-cell population were not associated with the predominant TcR delta rearrangement found in peripheral blood gamma delta cells, but were similar to those found in gamma delta TcR cells infiltrating rheumatoid synovium. The data indicate the presence of a monoclonal population of gamma delta cells TcR cells which in the face of continued immunosuppression behaved benignly. The case may represent a cytomorphologically atypical example of the large granular lymphocytes, neutropenia and arthropathy syndrome/lymphoproliferative disease of granular lymphocytes and, although the patient's clinical features were not 'classical', rheumatoid arthritis (RA) may have been the underlying primary disorder.
Collapse
Affiliation(s)
- E Hodges
- Molecular Immunology Group, Southampton University Hospitals NHS Trust
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Abstract
Karyotypes of different morphological forms of oval cell types of Malassezia furfur (previously called Pityrosporum ovale) were examined by pulsed-field gel electrophoresis. All strains produced patterns containing seven chromosome bands. These patterns could be separated into three distinct groups, which appeared to correlate with groups based on morphology.
Collapse
Affiliation(s)
- S A Howell
- Department of Microbial Diseases, St. John's Institute of Dermatology UMDS, St. Thomas' Hospital, London, UK
| | | | | |
Collapse
|