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Drut A, Mkaouar H, Kriaa A, Mariaule V, Akermi N, Méric T, Sénécat O, Maguin E, Hernandez J, Rhimi M. Gut microbiota in cats with inflammatory bowel disease and low-grade intestinal T-cell lymphoma. Front Microbiol 2024; 15:1346639. [PMID: 38812688 PMCID: PMC11133722 DOI: 10.3389/fmicb.2024.1346639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 04/29/2024] [Indexed: 05/31/2024] Open
Abstract
In cats and humans, several physiological and environmental factors have been shown to alter the gut microbiota of healthy individuals. Cats share several diseases with humans such as inflammatory bowel diseases and low-grade intestinal T-cell lymphoma. The physiopathology of these chronic enteropathies is poorly understood but may involve disequilibrium of the gut microbiota composition and disruption of normal microbiome activity profiles. These disorders are increasingly diagnosed in the feline species due to improved medicalization and easier access to endoscopy in veterinary practice. This review addresses the current data on the gut microbiota of cats in health and in chronic enteropathies. Such functional analysis will help the advancement of innovative diagnostic tools and targeted therapeutic strategies.
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Affiliation(s)
- Amandine Drut
- MIHA Team, INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
- Oniris VetAgroBio Nantes, Université de Nantes, Nantes, France
| | - Héla Mkaouar
- MIHA Team, INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Aicha Kriaa
- MIHA Team, INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Vincent Mariaule
- MIHA Team, INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Nizar Akermi
- MIHA Team, INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Tristan Méric
- MIHA Team, INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
- Oniris VetAgroBio Nantes, Université de Nantes, Nantes, France
| | - Odile Sénécat
- Oniris VetAgroBio Nantes, Université de Nantes, Nantes, France
| | - Emmanuelle Maguin
- MIHA Team, INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Juan Hernandez
- MIHA Team, INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
- Oniris VetAgroBio Nantes, Université de Nantes, Nantes, France
| | - Moez Rhimi
- MIHA Team, INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
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2
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Rolph MJ, Bolfa P, Cavanaugh SM, Rolph KE. Fluorescent In Situ Hybridization for the Detection of Intracellular Bacteria in Companion Animals. Vet Sci 2024; 11:52. [PMID: 38275934 PMCID: PMC10821249 DOI: 10.3390/vetsci11010052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/10/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024] Open
Abstract
FISH techniques have been applied for the visualization and identification of intracellular bacteria in companion animal species. Most frequently, these techniques have focused on the identification of adhesive-invasive Escherichia coli in gastrointestinal disease, although various other organisms have been identified in inflammatory or neoplastic gastrointestinal disease. Previous studies have investigated a potential role of Helicobacter spp. in inflammatory gastrointestinal and hepatic conditions. Other studies evaluating the role of infectious organisms in hepatopathies have received some attention with mixed results. FISH techniques using both eubacterial and species-specific probes have been applied in inflammatory cardiovascular, urinary, and cutaneous diseases to screen for intracellular bacteria. This review summarizes the results of these studies.
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Affiliation(s)
| | | | | | - Kerry E. Rolph
- Center for Integrative Mammalian Research, Ross University School of Veterinary Medicine, Basseterre P.O. Box 334, Saint Kitts and Nevis
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Oba PM, De La Guardia Hidrogo VM, Kelly J, Saunders-Blades J, Steelman AJ, Swanson KS. Effects of diets supplemented with bioactive peptides on nutrient digestibility, immune cell responsiveness, and fecal characteristics, microbiota, and metabolites of adult cats. J Anim Sci 2024; 102:skae104. [PMID: 38587063 PMCID: PMC11067789 DOI: 10.1093/jas/skae104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 04/06/2024] [Indexed: 04/09/2024] Open
Abstract
Bioactive peptides (BP) are recognized for their ability to function as antioxidants and maintain lipid stability. They may have positive health effects, including antihypertensive, anti-inflammatory, antimicrobial, osteoprotective, gut health, and immunomodulatory properties, but are poorly tested in cats. Our primary objective was to determine the apparent total tract digestibility (ATTD) of BP-containing kibble diets and assess how the fecal characteristics, metabolites, and microbiota were affected in adult cats. Our secondary objective was to test whether BP could impact blood oxidative stress markers and cytokine concentrations following transport stress. Twelve adult cats (4.83 ± 0.37 yr; 4.76 ± 0.14 kg) were used in a replicated 4 × 4 Latin square design to test four extruded kibble diets: Control (no BP), Chicken (4% chicken BP), Marine1 (2% marine BP), and Marine2 (4% marine BP). Each experimental period lasted 28 d, with a 20-d adaptation phase, 5 d for fecal collection, 2 d for blood collection, and 1 d for transport stress testing (driven in vehicle in individual carriers for 45 min). Salivary cortisol and blood oxidative stress markers and cytokines were measured after transport. Fecal microbiota data were evaluated using 16S rRNA gene amplicon sequencing and QIIME2. All other data were analyzed using the Mixed Models procedure of SAS, with P < 0.05 being considered significant and P < 0.10 considered trends. No differences were observed in animal health outcomes, with all cats remaining healthy and serum metabolites remaining within reference ranges. Cats fed the Marine2 diet had higher (P < 0.05) ATTD of dry matter (84.5% vs. 80.9%) and organic matter (88.3% vs. 85.8%) than those fed the control diet. The ATTD of protein and energy tended to be higher (P < 0.10) for cats fed the Marine2 diet. Fecal characteristics, metabolites, and bacterial alpha and beta diversity measures were not affected by treatment. However, the relative abundances of six bacterial genera were different (P < 0.05) and two bacterial genera tended to be different (P < 0.10) across treatments. Treatment did not alter salivary cortisol, blood oxidative stress markers, or blood cytokines after transport stress. Our data suggest that BP inclusion may increase nutrient digestibility and modify fecal microbiota and immune measures. More testing is required, however, to determine whether BP may provide additional benefits to cats.
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Affiliation(s)
- Patrícia M Oba
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
| | | | - Janelle Kelly
- Champion Petfoods Holding, Inc., Edmonton, AB T5S 2W6, Canada
| | | | - Andrew J Steelman
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
| | - Kelly S Swanson
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
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4
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Miller J, Żebrowska-Różańska P, Czajkowska A, Szponar B, Kumala-Ćwikła A, Chmielarz M, Łaczmański Ł. Faecal microbiota and fatty acids in feline chronic enteropathy. BMC Vet Res 2023; 19:281. [PMID: 38124157 PMCID: PMC10731866 DOI: 10.1186/s12917-023-03824-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 11/27/2023] [Indexed: 12/23/2023] Open
Abstract
BACKGROUND Feline chronic enteropathy is a set of disorders defined as the presence of clinical signs of gastrointestinal disease for at least three weeks. The most common final diagnoses are inflammatory bowel disease and alimentary small cell lymphoma. The etiopathogenesis of these diseases is incompletely understood; however, it is hypothesised that they involve a combination of factors, including altered composition and/or functionality of the intestinal microbiome. An important factor in the interplay of the microbiome and host is the production of short- and branched-chain fatty acids. The aim of this study was to evaluate the possible differences in faecal microbiota diversity, composition and fatty acid production between cats suffering from chronic enteropathy and healthy cats. Sixteen cats suffering from chronic enteropathy and fourteen healthy control cats were enrolled in the study. The microbiota compositions of faecal samples were analysed by using next-generation amplicon sequencing of the V3V4 fragment of the 16S rRNA gene. Fatty acids were evaluated by high-performance liquid chromatography. RESULTS Both the alpha and beta diversities were significantly lower in samples obtained from cats with chronic enteropathy. The relative abundance of the phylum Proteobacteria, orders Lactobacillales and Enterobacterales, family Enteriobacteriaceae and genus Escherichia Shigella were higher in diseased cats, whereas the abundance of the phylum Bacteroidota and order Peptococcales were higher in control cats. The faecal concentrations of short-chain fatty acids were higher in cats with chronic enteropathy, with lower propionate proportions and higher butyrate proportions. CONCLUSION The study revealed alterations in microbiota compositions and short-chain fatty acid concentration in cats suffering from chronic enteropathy, which is an important finding both for research on the pathogenesis of the disease and for potential therapeutic interventions in the form of faecal microbiota transplantation and/or probiotic supplementation.
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Affiliation(s)
- Julia Miller
- Department of Immunology, Pathophysiology and Veterinary Preventive Medicine, Wroclaw University of Environmental and Life Sciences, Norwida 31, Wroclaw, 50-375, Poland.
| | - Paulina Żebrowska-Różańska
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Aleksandra Czajkowska
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Bogumiła Szponar
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Aleksandra Kumala-Ćwikła
- Department of Basic Sciences, Faculty of Health Sciences, Wroclaw Medical University, Wroclaw, Poland
| | | | - Łukasz Łaczmański
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
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5
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Qu Y, Park SH, Dallas DC. The Role of Bovine Kappa-Casein Glycomacropeptide in Modulating the Microbiome and Inflammatory Responses of Irritable Bowel Syndrome. Nutrients 2023; 15:3991. [PMID: 37764775 PMCID: PMC10538225 DOI: 10.3390/nu15183991] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/10/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023] Open
Abstract
Irritable bowel syndrome (IBS) is a common gastrointestinal disorder marked by chronic abdominal pain, bloating, and irregular bowel habits. Effective treatments are still actively sought. Kappa-casein glycomacropeptide (GMP), a milk-derived peptide, holds promise because it can modulate the gut microbiome, immune responses, gut motility, and barrier functions, as well as binding toxins. These properties align with the recognized pathophysiological aspects of IBS, including gut microbiota imbalances, immune system dysregulation, and altered gut barrier functions. This review delves into GMP's role in regulating the gut microbiome, accentuating its influence on bacterial populations and its potential to promote beneficial bacteria while inhibiting pathogenic varieties. It further investigates the gut microbial shifts observed in IBS patients and contemplates GMP's potential for restoring microbial equilibrium and overall gut health. The anti-inflammatory attributes of GMP, especially its impact on vital inflammatory markers and capacity to temper the low-grade inflammation present in IBS are also discussed. In addition, this review delves into current research on GMP's effects on gut motility and barrier integrity and examines the changes in gut motility and barrier function observed in IBS sufferers. The overarching goal is to assess the potential clinical utility of GMP in IBS management.
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Affiliation(s)
- Yunyao Qu
- Department of Food Science & Technology, Oregon State University, Corvallis, OR 97331, USA; (Y.Q.); (S.H.P.)
- Nutrition Program, College of Health, Oregon State University, Corvallis, OR 97331, USA
| | - Si Hong Park
- Department of Food Science & Technology, Oregon State University, Corvallis, OR 97331, USA; (Y.Q.); (S.H.P.)
| | - David C. Dallas
- Department of Food Science & Technology, Oregon State University, Corvallis, OR 97331, USA; (Y.Q.); (S.H.P.)
- Nutrition Program, College of Health, Oregon State University, Corvallis, OR 97331, USA
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6
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Sung CH, Pilla R, Marsilio S, Chow B, Zornow KA, Slovak JE, Lidbury JA, Steiner JM, Hill SL, Suchodolski JS. Fecal Concentrations of Long-Chain Fatty Acids, Sterols, and Unconjugated Bile Acids in Cats with Chronic Enteropathy. Animals (Basel) 2023; 13:2753. [PMID: 37685017 PMCID: PMC10486672 DOI: 10.3390/ani13172753] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/17/2023] [Accepted: 08/28/2023] [Indexed: 09/10/2023] Open
Abstract
Chronic enteropathy (CE) in cats encompasses food-responsive enteropathy, chronic inflammatory enteropathy (or inflammatory bowel disease), and low-grade intestinal T-cell lymphoma. While alterations in the gut metabolome have been extensively studied in humans and dogs with gastrointestinal disorders, little is known about the specific metabolic profile of cats with CE. As lipids take part in energy storage, inflammation, and cellular structure, investigating the lipid profile in cats with CE is crucial. This study aimed to measure fecal concentrations of various fatty acids, sterols, and bile acids. Fecal samples from 56 cats with CE and 77 healthy control cats were analyzed using gas chromatography-mass spectrometry, targeting 12 fatty acids, 10 sterols, and 5 unconjugated bile acids. Fecal concentrations of nine targeted fatty acids and animal-derived sterols were significantly increased in cats with CE. However, fecal concentrations of plant-derived sterols were significantly decreased in cats with CE. Additionally, an increased percentage of primary bile acids was observed in a subset of cats with CE. These findings suggest the presence of lipid maldigestion, malabsorption, and inflammation in the gastrointestinal tract of cats with CE. Understanding the lipid alterations in cats with CE can provide insights into the disease mechanisms and potential future therapeutic strategies.
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Affiliation(s)
- Chi-Hsuan Sung
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX 77843, USA; (C.-H.S.)
| | - Rachel Pilla
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX 77843, USA; (C.-H.S.)
| | - Sina Marsilio
- UC Davis School of Veterinary Medicine, Department of Veterinary Medicine and Epidemiology, University of California, Davis, CA 95616, USA
| | - Betty Chow
- Veterinary Specialty Hospital, San Diego, CA 92121, USA
- VCA Animal Specialty and Emergency Center, Los Angeles, CA 90025, USA
| | | | | | - Jonathan A. Lidbury
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX 77843, USA; (C.-H.S.)
| | - Joerg M. Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX 77843, USA; (C.-H.S.)
| | - Steve L. Hill
- Veterinary Specialty Hospital, San Diego, CA 92121, USA
- Flagstaff Veterinary Internal Medicine Consulting, Flagstaff, AZ 86004, USA
| | - Jan S. Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX 77843, USA; (C.-H.S.)
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Zhang M, Mo R, Li M, Qu Y, Wang H, Liu T, Liu P, Wu Y. Comparison of the Effects of Enzymolysis Seaweed Powder and Saccharomyces boulardii on Intestinal Health and Microbiota Composition in Kittens. Metabolites 2023; 13:metabo13050637. [PMID: 37233678 DOI: 10.3390/metabo13050637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/19/2023] [Accepted: 05/05/2023] [Indexed: 05/27/2023] Open
Abstract
Kittens are prone to intestinal health problems as their intestines are not completely developed. Seaweed is rich in plant polysaccharides and bioactive substances that are highly beneficial to gut health. However, the effects of seaweed on cat gut health have not been assessed. This study compared the effects of dietary supplementation with enzymolysis seaweed powder and Saccharomyces boulardii on the intestinal health of kittens. In total, 30 Ragdoll kittens (age: 6 months; weight: 1.50 ± 0.29 kg) were assigned to three treatment groups for a 4-week feeding trial. The dietary treatment given was as follows: (1) basal diet (CON); (2) CON + enzymolysis seaweed powder (20 g/kg of feed) mixed evenly with the diet (SE); and (3) CON + Saccharomyces boulardii (2 × 1010 CFU/kg of feed) mixed evenly with the diet (SB). Compared with the CON and SB groups, dietary supplementation with the enzymolysis seaweed powder improved the immune and antioxidant capacity and also reduced the intestinal permeability and inflammation levels of kittens. The relative abundance of Bacteroidetes, Lachnospiraceae, Prevotellaceae, and Faecalibacterium in the SE group was higher than those in the CON and SB groups (p ≤ 0.05), while the relative abundance of Desulfobacterota, Sutterellaceae, and Erysipelatoclostridium in the SB group was lower than that in the SE group (p ≤ 0.05). Moreover, enzymolysis seaweed powder did not alter the level of intestinal SCFAs in kittens. Conclusively, supplementing kitten diet with enzymolysis seaweed powder can promote intestinal health by enhancing the gut barrier function and optimizing the microbiota composition. Our findings provide new perspectives on the application of enzymolysis seaweed powder.
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Affiliation(s)
- Mingrui Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Ruixia Mo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Mingtan Li
- Shidai Marine Biotechnology Co., Ltd., Weihai 264319, China
| | - Yuankai Qu
- Shidai Marine Biotechnology Co., Ltd., Weihai 264319, China
| | - Haotian Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Tianyi Liu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Pan Liu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Yi Wu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
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Effects of Softening Dry Food with Water on Stress Response, Intestinal Microbiome, and Metabolic Profile in Beagle Dogs. Metabolites 2022; 12:metabo12111124. [PMID: 36422265 PMCID: PMC9697261 DOI: 10.3390/metabo12111124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/07/2022] [Accepted: 11/12/2022] [Indexed: 11/18/2022] Open
Abstract
Softening dry food with water is believed to be more beneficial to the intestinal health and nutrients absorption of dogs by some owners, but there appears to be little scientific basis for this belief. Thus, this study aimed to compare feeding dry food (DF) and water-softened dry food (SDF) on stress response, intestinal microbiome, and metabolic profile in dogs. Twenty healthy 5-month-old beagle dogs were selected and divided into two groups according to their gender and body weight using a completely randomized block design. Both groups were fed the same basal diet, with one group fed DF and the other fed SDF. The trial lasted for 21 days. The apparent total tract digestibility (ATTD) of nutrients, inflammatory cytokines, stress hormones, heat shock protein-70 (HSP-70), fecal microbiota, short-chain fatty acids (SCFAs), branch-chain fatty acids (BCFAs), and metabolomics were measured. Results showed that there was no significant difference in body weight, ATTD, and SCFAs between the DF and SDF groups (p > 0.05), whereas feeding with SDF caused a significant increase in serum cortisol level (p < 0.05) and tended to have higher interleukin-2 (p = 0.062) and HSP-70 (p = 0.097) levels. Fecal 16S rRNA gene sequencing found that the SDF group had higher alpha diversity indices (p < 0.05). Furthermore, the SDF group had higher levels of Streptococcus, Enterococcus, and Escherichia_Shigella, and lower levels of Faecalibacterium (p < 0.05). Serum and fecal metabolomics further showed that feeding with SDF significantly influenced the purine metabolism, riboflavin metabolism, and arginine and proline metabolism (p < 0.05). Overall, feeding with SDF caused higher cortisol level and generated effects of higher intestinal microbial diversity in dogs, but it caused an increase in some pathogenic bacteria, which may result in intestinal microbiome disturbance and metabolic disorder in dogs. In conclusion, feeding with SDF did not provide digestive benefits but caused some stress and posed a potential threat to the intestinal health of dogs. Thus, SDF is not recommended in the feeding of dogs.
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9
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The Effects of Bacillus licheniformis—Fermented Products on the Microbiota and Clinical Presentation of Cats with Chronic Diarrhea. Animals (Basel) 2022; 12:ani12172187. [PMID: 36077904 PMCID: PMC9454741 DOI: 10.3390/ani12172187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 08/21/2022] [Accepted: 08/22/2022] [Indexed: 11/17/2022] Open
Abstract
Bacillus licheniformis-fermented products (BLFP) are probiotics with antibacterial, antiviral, and anti-inflammatory properties that can improve growth performance. This study aimed to compare the fecal microbiota of diarrheal cats with chronic diarrhea (n = 8) with that of healthy cats (n = 4) from the same household using next-generation sequencing, and evaluate the effectiveness of oral administration of BLFP in relieving clinical signs and altering the intestinal microbiota in diarrheal cats. Six out of eight diarrheal cats showed clinical improvement after BLFP administration for 7 days, and the stool condition of the other two was normal. A higher Firmicutes/Bacteroidetes ratio was noted in the feces of diarrheal cats without clinical improvement as compared with those in the healthy cats and in the diarrheal cats with clinical improvement after receiving BLFP. The phylum Bacteroidetes and class Bacteroidia decreased significantly in diarrheal cats regardless of BLFP administration. Blautia spp., Ruminococcus torques, and Ruminococcus gnavus, which belong to the Clostridium cluster XIVa and have been reported as beneficial to intestinal health, increased significantly in feces after treatment. Furthermore, Clostridium perfringens also significantly decreased in diarrheal cats after BLFP administration. Overall, BLFP could be a potential probiotic to relieve gastrointestinal symptoms and improve fecal microbiota in cats with chronic diarrhea.
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10
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Sung CH, Marsilio S, Chow B, Zornow KA, Slovak JE, Pilla R, Lidbury JA, Steiner JM, Park SY, Hong MP, Hill SL, Suchodolski JS. Dysbiosis index to evaluate the fecal microbiota in healthy cats and cats with chronic enteropathies. J Feline Med Surg 2022; 24:e1-e12. [PMID: 35266809 PMCID: PMC9160961 DOI: 10.1177/1098612x221077876] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVES Previous studies have identified various bacterial taxa that are altered in cats with chronic enteropathies (CE) vs healthy cats. Therefore, the aim of this study was to develop a targeted quantitative molecular method to evaluate the fecal microbiota of cats. METHODS Fecal samples from 80 client-owned healthy cats and 68 cats with CE were retrospectively evaluated. A panel of quantitative PCR (qPCR) assays was used to measure the fecal abundance of total bacteria and seven bacterial taxa: Bacteroides, Bifidobacterium, Clostridium hiranonis, Escherichia coli, Faecalibacterium, Streptococcus and Turicibacter. The nearest centroid classifier algorithm was used to calculate a dysbiosis index (DI) based on these qPCR abundances. RESULTS The abundances of total bacteria, Bacteroides, Bifidobacterium, C hiranonis, Faecalibacterium and Turicibacter were significantly decreased, while those of E coli and Streptococcus were significantly increased in cats with CE (P <0.027 for all). The DI in cats with CE was significantly higher compared with healthy cats (P <0.001). When the cut-off value of the DI was set at 0, it provided 77% (95% confidence interval [CI] 66-85) sensitivity and 96% (95% CI 89-99) specificity to differentiate the microbiota of cats with CE from those of healthy cats. Fifty-two of 68 cats with CE had a DI >0. CONCLUSIONS AND RELEVANCE A qPCR-based DI for assessing the fecal microbiota of cats was established. The results showed that a large proportion of cats with CE had an altered fecal microbiota as evidenced by an increased DI. Prospective studies are warranted to evaluate the utility of this assay for clinical assessment of feline CE.
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Affiliation(s)
- Chi-Hsuan Sung
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, USA
| | - Sina Marsilio
- UC Davis School of Veterinary Medicine, Department of Veterinary Medicine and Epidemiology, University of California-Davis, Davis, CA, USA
| | - Betty Chow
- Veterinary Specialty Hospital, San Diego, CA, USA
- VCA Animal Specialty and Emergency Center, Los Angeles, CA, USA
| | | | | | - Rachel Pilla
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, USA
| | - Jonathan A Lidbury
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, USA
| | - Jörg M Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, USA
| | - So Young Park
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, USA
| | - Min-Pyo Hong
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, USA
| | - Steve L Hill
- Veterinary Specialty Hospital, San Diego, CA, USA
- Flagstaff Veterinary Internal Medicine Consulting, Flagstaff, AZ, USA
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, USA
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11
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Yu YY, Liang L, Xiao HB. Comparative study on fecal flora and blood biochemical indexes in normal and diarrhea British Shorthair cats. Arch Microbiol 2022; 204:257. [PMID: 35416536 DOI: 10.1007/s00203-022-02805-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 02/10/2022] [Accepted: 02/13/2022] [Indexed: 11/28/2022]
Abstract
In recent years, 16S ribosomal DNA (16S rDNA) sequencing has been widely developed. In the present study, we investigated the changes of fecal flora analyzed by sequencing of 16S rDNA and the alteration of blood biochemical indexes in cats during diarrhea. Seven normal fecal samples and seven fecal samples of British Shorthair cats with bacterial diarrhea about 6 months old were collected. The 16S rDNA V3 region of the bacteria was amplified for high-throughput sequencing. Finally, species analysis at various levels was performed. At the same time, samples of blood were taken to examine the changes of biochemical indexes in cats with diarrhea. The abundance and diversity of microflora in the healthy group were greater than those in the diarrhea group. The normal floras in the feces of healthy cats were Firmicutes, Actinobacteria, Bacteroidetes and Proteobacteria. The content of Proteobacteria and Firmicutes varied greatly in diarrheal cats. In addition, the number of white blood cells, lymphocytes, neutrophils, and globulin were increased in cats with diarrhea, whereas albumin level was decreased in diarrheal cats. In conclusion, the present study suggests 16SrDNA technology showed that the intestinal Proteus was abundant, and the content of Firmicutes was scarce in cats with diarrhea. Escherichia-Shigella was the main pathogens in this sample. Rapid blood biochemical tests may help clinicians to assess the severity and prognosis of cats with diarrhea.
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Affiliation(s)
- Yuan-Yuan Yu
- College of Veterinary Medicine, Hunan Agricultural University, Furong District, Changsha, 410128, China
| | - Lin Liang
- College of Veterinary Medicine, Hunan Agricultural University, Furong District, Changsha, 410128, China
| | - Hong-Bo Xiao
- College of Veterinary Medicine, Hunan Agricultural University, Furong District, Changsha, 410128, China.
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12
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In Silico Study Approach on a Series of 50 Polyphenolic Compounds in Plants; A Comparison on the Bioavailability and Bioactivity Data. Molecules 2022; 27:molecules27041413. [PMID: 35209203 PMCID: PMC8878759 DOI: 10.3390/molecules27041413] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/31/2022] [Accepted: 02/17/2022] [Indexed: 11/17/2022] Open
Abstract
Fifty (50) phytocompounds from several subclasses of polyphenols, chosen based on their abundance in the plant world, were analyzed through density functional methods, using computational tools to evaluate their oral availability and particular bioactivity on several cell modulators; key descriptors and molecular features related to the electron density and electrostatic potential for the lowest energy conformers of the investigated molecules were computed. An analysis of the bioactivity scores towards six cell modulators (GPCR ligand, ion channel modulator, kinase inhibitor, nuclear receptor ligand, protease inhibitor and enzyme inhibitor) was also achieved, in the context of investigating their potential side effects on the human digestive processes. Summarizing, computational results confirmed in vivo and in vitro data regarding the high bioavailability of soy isoflavones and better bioavailability of free aglycones in comparison with their esterified and glycosylated forms. However, by a computational approach analyzing Lipinski’s rule, apigenin and apigenin-7-O-rhamnoside, naringenin, hesperetin, genistein, daidzin, biochanin A and formonetin in the flavonoid series and all hydroxycinnamic acids and all hydroxybenzoic acids excepting ellagic acid were proved to have the best bioavailability data; rhamnoside derivatives, the predominant glycosides in green plants, which were reported to have the lowest bioavailability values by in vivo studies, were revealed to have the best bioavailability data among the studied flavonoids in the computational approach. Results of in silico screening on the phenolic derivatives series also revealed their real inhibitory potency on the six parameters studied, showing a remarkable similitude between the flavonoid series, while flavonoids were more powerful natural cell modulators than the phenyl carboxylic acids tested. Thus, it can be concluded that there is a need for supplementation with digestive enzymes, mainly in the case of individuals with low digestive efficiency, to obtain the best health benefits of polyphenols in humans.
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13
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Oral and Intestinal Bacterial Substances Associated with Disease Activities in Patients with Rheumatoid Arthritis: A Cross-Sectional Clinical Study. J Immunol Res 2022; 2022:6839356. [PMID: 35224112 PMCID: PMC8881124 DOI: 10.1155/2022/6839356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 01/19/2022] [Accepted: 01/27/2022] [Indexed: 01/02/2023] Open
Abstract
Intestinal bacterial compositions of rheumatoid arthritis (RA) patients have been reported to be different from those of healthy people. Dysbiosis, imbalance of the microbiota, is widely known to cause gut barrier damage, resulting in an influx of bacteria and their substances into host bloodstreams in animal studies. However, few studies have investigated the effect of bacterial substances on the pathophysiology of RA. In this study, eighty-seven active RA patients who had inadequate responses to conventional synthetic disease-modifying antirheumatic drugs or severe comorbidities were analyzed for correlations between many factors such as disease activities, disease biomarkers, intestinal bacterial counts, fecal and serum lipopolysaccharide (LPS), LPS-binding protein (LBP), endotoxin neutralizing capacity (ENC), and serum antibacterial substance IgG and IgA antibody levels by multiple regression analysis with consideration for demographic factors such as age, sex, smoking, and methotrexate treatment. Serum LBP levels, fecal LPS levels, total bacteria counts, serum anti-LPS from Porphyromonas gingivalis (Pg-LPS) IgG antibody levels, and serum anti-Pg-LPS IgA antibody levels were selected for multiple regression analysis using Spearman’s correlation analysis. Serum LBP levels were correlated with disease biomarker levels, such as erythrocyte sedimentation rate (
), C-reactive protein (
), matrix metalloproteinase-3 (
), and IL-6 (
), and were inversely correlated with hemoglobin (
). Anti-Pg-LPS IgG antibody levels were inversely correlated with activity indices such as patient global assessments using visual analogue scale (VAS) (
) and painVAS (
). Total bacteria counts were correlated with ENC (
), and inversely correlated with serum LPS (
) and anti-Pg-LPS IgA antibody levels (
). These results suggest that substances from oral and gut microbiota may influence disease activity in RA patients.
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14
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Kathrani A, Yen S, Swann JR, Hall EJ. The effect of a hydrolyzed protein diet on the fecal microbiota in cats with chronic enteropathy. Sci Rep 2022; 12:2746. [PMID: 35177696 PMCID: PMC8854717 DOI: 10.1038/s41598-022-06576-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 02/02/2022] [Indexed: 11/09/2022] Open
Abstract
The effect of a hydrolyzed protein diet on the fecal microbiota has not been studied in feline chronic enteropathy (CE). Our study aimed to (1) compare the fecal microbiota of cats with CE to control cats with no gastrointestinal signs and (2) determine the effect of a hydrolyzed protein diet on the fecal microbiota of cats with CE and whether this differs between dietary responders and non-responders. The fecal microbiome of cats with CE (n = 36) showed decreased α-diversity in terms of genus richness (P = 0.04) and increased β-diversity in terms of Bray–Curtis Dissimilarity (P < 0.001) compared to control cats (n = 14). Clostridium was the only genera significantly over-represented in cats with CE compared to control cats (adjusted P < 0.1). After 6-weeks of feeding the diet, fifteen cats were classified as responders and 18 as non-responders, based on clinical signs. At the genus level, α-diversity was increased in non-responders versus responders at diagnosis, but decreased after dietary intervention in both groups (P < 0.05). At the family level, non-responders became increasingly dissimilar after dietary intervention (P = 0.012). In general, the abundance of bacteria decreased with feeding a hydrolyzed diet, with the genera most significantly affected being more frequently observed in non-responders. Bifidobacterium was the only genus that increased significantly in abundance post-diet and this effect was observed in both responders and non-responders. Both Oscillibacter and Desulfovibrionaceae_unclassified were most abundant in non-responders at diagnosis but were rarely observed post diet in neither responders nor non-responders. Cats with CE had similar microbiota changes to those described in human inflammatory bowel disease. Whether the presence of Oscillibacter and Desulfovibrionaceae_unclassified are indicators of non-response to the diet at diagnosis requires further investigation. Despite the hydrolyzed diet reducing α-diversity in all cats with CE, this did not resolve gastrointestinal signs in some cats. However, responders metabolized the diet in a similar manner, reflected by sustained β-diversity, while the microbiome of non-responders became increasingly dissimilar compared to diagnosis at the family level. Therefore, the microbiome may not be as tightly regulated in cats with CE that are non-responders and therefore, these cats would require additional therapy for remission of clinical signs.
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Affiliation(s)
- Aarti Kathrani
- Royal Veterinary College, Hawkshead Lane, Hertfordshire, AL9 7TA, UK.
| | - Sandi Yen
- Oxford Centre for Microbiome Studies, Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, UK
| | - Jonathan R Swann
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK.,Department of Surgery and Cancer, Sir Alexander Fleming Building, South Kensington Campus, London, SW7 2AZ, UK
| | - Edward J Hall
- Bristol Veterinary School, University of Bristol, Langford, Bristol, BS40 5DU, UK
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15
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Lee D, Goh TW, Kang MG, Choi HJ, Yeo SY, Yang J, Huh CS, Kim YY, Kim Y. Perspectives and Advances in Probiotics and the Gut Microbiome in
Companion Animals. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2022; 64:197-217. [PMID: 35530406 PMCID: PMC9039956 DOI: 10.5187/jast.2022.e8] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 01/14/2022] [Accepted: 01/17/2022] [Indexed: 11/30/2022]
Abstract
As the number of households that raise dogs and cats is increasing, there is
growing interest in animal health. The gut plays an important role in animal
health. In particular, the microbiome in the gut is known to affect both the
absorption and metabolism of nutrients and the protective functions of the host.
Using probiotics on pets has beneficial effects, such as modulating the immune
system, helping to reduce stress, protecting against pathogenic bacteria and
developing growth performance. The goals of this review are to summarize the
relationship between probiotics/the gut microbiome and animal health, to feature
technology used for identifying the diversity of microbiota composition of
canine and feline microbiota, and to discuss recent reports on probiotics in
canines and felines and the safety issues associated with probiotics and the gut
microbiome in companion animals.
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Affiliation(s)
- Daniel Lee
- Department of Agricultural Biotechnology
and Research Institute of Agriculture and Life Science, Seoul National
University, Seoul 08826, Korea
| | - Tae Wook Goh
- Department of Agricultural Biotechnology
and Research Institute of Agriculture and Life Science, Seoul National
University, Seoul 08826, Korea
| | - Min Geun Kang
- Department of Agricultural Biotechnology
and Research Institute of Agriculture and Life Science, Seoul National
University, Seoul 08826, Korea
| | - Hye Jin Choi
- Department of Agricultural Biotechnology
and Research Institute of Agriculture and Life Science, Seoul National
University, Seoul 08826, Korea
| | - So Young Yeo
- Department of Agricultural Biotechnology
and Research Institute of Agriculture and Life Science, Seoul National
University, Seoul 08826, Korea
| | | | - Chul Sung Huh
- Research Institute of Eco-Friendly
Livestock Science, Institute of Green-Bio Science and Technology, Seoul
National University, Pyeongchang 25354, Korea
- Graduate School of International
Agricultural Technology, Seoul National University,
Pyeongchang 25354, Korea
| | - Yoo Yong Kim
- Department of Agricultural Biotechnology
and Research Institute of Agriculture and Life Science, Seoul National
University, Seoul 08826, Korea
| | - Younghoon Kim
- Department of Agricultural Biotechnology
and Research Institute of Agriculture and Life Science, Seoul National
University, Seoul 08826, Korea
- Corresponding author: Younghoon Kim, Department of
Agricultural Biotechnology and Research Institute of Agriculture and Life
Science, Seoul National University, Seoul 08826, Korea. Tel: +82-2-880-4808,
E-mail:
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16
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Short- and long-term effects of amoxicillin/clavulanic acid or doxycycline on the gastrointestinal microbiome of growing cats. PLoS One 2021; 16:e0253031. [PMID: 34910719 PMCID: PMC8673677 DOI: 10.1371/journal.pone.0253031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 10/18/2021] [Indexed: 02/07/2023] Open
Abstract
Antibiotic treatment in early life influences gastrointestinal (GI) microbial composition and function. In humans, the resultant intestinal dysbiosis is associated with an increased risk for certain diseases later in life. The objective of this study was to determine the temporal effects of antibiotic treatment on the GI microbiome of young cats. Fecal samples were collected from cats randomly allocated to receive either amoxicillin/clavulanic acid (20 mg/kg q12h) for 20 days (AMC group; 15 cats) or doxycycline (10 mg/kg q24h) for 28 days (DOX group;15 cats) as part of the standard treatment of upper respiratory tract infection. In addition, feces were collected from healthy control cats (CON group;15 cats). All cats were approximately two months of age at enrolment. Samples were collected on days 0 (baseline), 20 or 28 (AMC and DOX, respectively; last day of treatment), 60, 120, and 300. DNA was extracted and sequencing of the 16S rRNA gene and qPCR assays were performed. Fecal microbial composition was different on the last day of treatment for AMC cats, and 1 month after the end of antibiotic treatment for DOX cats, compared to CON cats. Species richness was significantly greater in DOX cats compared to CON cats on the last day of treatment. Abundance of Enterobacteriales was increased, and that of Erysipelotrichi was decreased in cats of the AMC group on the last day of treatment compared to CON cats. The abundance of the phylum Proteobacteria was increased in cats of the DOX group on days 60 and 120 compared to cats of the CON group. Only minor differences in abundances between the treatment groups and the control group were present on day 300. Both antibiotics appear to delay the developmental progression of the microbiome, and this effect is more profound during treatment with amoxicillin/clavulanic acid and one month after treatment with doxycycline. Future studies are required to determine if these changes influence microbiome function and whether they have possible effects on disease susceptibility in cats.
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17
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Assessing the in vitro digestion of Sesbania gum, a galactomannan from S. cannabina, and subsequent impact on the fecal microbiota. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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18
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Guo Y, Guo H, Qiu L, Fu Y, Zhu X, Zhang H, Wang J, Chen D. Appetite Suppression and Interleukin 17 Receptor Signaling Activation of Colonic Mycobiota Dysbiosis Induced by High Temperature and High Humidity Conditions. Front Cell Infect Microbiol 2021; 11:657807. [PMID: 34568080 PMCID: PMC8462304 DOI: 10.3389/fcimb.2021.657807] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 04/27/2021] [Indexed: 12/12/2022] Open
Abstract
It is known that the microbiome affects human physiology, emotion, disease, growth, and development. Most humans exhibit reduced appetites under high temperature and high humidity (HTHH) conditions, and HTHH environments favor fungal growth. Therefore, we hypothesized that the colonic mycobiota may affect the host’s appetite under HTHH conditions. Changes in humidity are also associated with autoimmune diseases. In the current study mice were fed in an HTHH environment (32°C ± 2°C, relative humidity 95%) maintained via an artificial climate box for 8 hours per day for 21 days. Food intake, the colonic fungal microbiome, the feces metabolome, and appetite regulators were monitored. Components of the interleukin 17 pathway were also examined. In the experimental groups food intake and body weight were reduced, and the colonic mycobiota and fecal metabolome were substantially altered compared to control groups maintained at 25°C ± 2°C and relative humidity 65%. The appetite-related proteins LEPT and POMC were upregulated in the hypothalamus (p < 0.05), and NYP gene expression was downregulated (p < 0.05). The expression levels of PYY and O-linked β-N-acetylglucosamine were altered in colonic tissues (p < 0.05), and interleukin 17 expression was upregulated in the colon. There was a strong correlation between colonic fungus and sugar metabolism. In fimo some metabolites of cholesterol, tromethamine, and cadaverine were significantly increased. There was significant elevation of the characteristic fungi Solicoccozyma aeria, and associated appetite suppression and interleukin 17 receptor signaling activation in some susceptible hosts, and disturbance of gut bacteria and fungi. The results indicate that the gut mycobiota plays an important role in the hypothalamus endocrine system with respect to appetite regulation via the gut-brain axis, and also plays an indispensable role in the stability of the gut microbiome and immunity. The mechanisms involved in these associations require extensive further studies.
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Affiliation(s)
- Yinrui Guo
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hongya Guo
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lingyan Qiu
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yuanfei Fu
- The Fourth Clinical Medicine School, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiangxiang Zhu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.,Academy of Life Sciences, Jinan University, Guangzhou, China
| | - Haiting Zhang
- Department of Chinese Medicine, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Jian Wang
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Diling Chen
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
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19
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Suchodolski JS. Analysis of the gut microbiome in dogs and cats. Vet Clin Pathol 2021; 50 Suppl 1:6-17. [PMID: 34514619 PMCID: PMC9292158 DOI: 10.1111/vcp.13031] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 04/08/2021] [Accepted: 04/20/2021] [Indexed: 12/15/2022]
Abstract
The gut microbiome is an important immune and metabolic organ. Intestinal bacteria produce various metabolites that influence the health of the intestine and other organ systems, including kidney, brain, and heart. Changes in the microbiome in diseased states are termed dysbiosis. The concept of dysbiosis is constantly evolving and includes changes in microbiome diversity and/or structure and functional changes (eg, altered production of bacterial metabolites). Molecular tools are now the standard for microbiome analysis. Sequencing of microbial genes provides information about the bacteria present and their functional potential but lacks standardization and analytical validation of methods and consistency in the reporting of results. This makes it difficult to compare results across studies or for individual clinical patients. The Dysbiosis Index (DI) is a validated quantitative PCR assay for canine fecal samples that measures the abundance of seven important bacterial taxa and summarizes the results as one single number. Reference intervals are established for dogs, and the DI can be used to assess the microbiome in clinical patients over time and in response to therapy (eg, fecal microbiota transplantation). In situ hybridization or immunohistochemistry allows the identification of mucosa‐adherent and intracellular bacteria in animals with intestinal disease, especially granulomatous colitis. Future directions include the measurement of bacterial metabolites in feces or serum as markers for the appropriate function of the microbiome. This article summarizes different approaches to the analysis of gut microbiota and how they might be applicable to research studies and clinical practice in dogs and cats.
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Affiliation(s)
- Jan S Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
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20
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Černá P, Kilpatrick S, Gunn-Moore DA. Feline comorbidities: What do we really know about feline triaditis? J Feline Med Surg 2021; 22:1047-1067. [PMID: 33100169 DOI: 10.1177/1098612x20965831] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PRACTICAL RELEVANCE Feline triaditis describes concurrent pancreatitis, cholangitis and inflammatory bowel disease (IBD). The reported prevalence is 17-39% in ill referral patients. While the aetiology is poorly understood, it is known to include infectious, autoimmune and physical components. What is not known is whether different organs are affected by different diseases, or the same process; indeed, triaditis may be part of a multiorgan inflammatory disease. Feline gastrointestinal tract anatomy plays its role too. Specifically, the short small intestine, high bacterial load and anatomic feature whereby the pancreatic duct joins the common bile duct before entering the duodenal papilla all increase the risk of bacterial reflux and parenchymal inflammation. Inflammation may also be a sequela of bowel bacterial translocation and systemic bacteraemia. DIAGNOSTIC CHALLENGES Cholangitis, pancreatitis and IBD manifest with overlapping, vague and non-specific clinical signs. Cholangitis may be accompanied by increased serum liver enzymes, total bilirubin and bile acid concentrations, and variable ultrasonographic changes. A presumptive diagnosis of pancreatitis is based on increased serum pancreatic lipase immunoreactivity or feline pancreas-specific lipase, and/or abnormal pancreatic changes on ultrasonography, though these tests have low sensitivity. Diagnosis of IBD is challenging without histopathology; ultrasound findings vary from normal to mucosal thickening or loss of layering. Triaditis may cause decreased serum folate or cobalamin (B12) concentrations due to intestinal disease and/or pancreatitis. Triaditis can only be confirmed with histopathology; hence, it remains a presumptive diagnosis in most cases. EVIDENCE BASE The literature on feline triaditis, pancreatitis, cholangitis and IBD is reviewed, focusing on histopathology, clinical significance and diagnostic challenges. Current management recommendations are provided. Further studies are needed to understand the complex pathophysiology, and in turn improve diagnosis and treatment.
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Affiliation(s)
- Petra Černá
- Department of Clinical Sciences, Colorado State University, Fort Collins, Colorado, and Small Animal Clinic, The University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
| | | | - Danielle A Gunn-Moore
- The Royal (Dick) School of Veterinary Studies, and The Roslin Institute, University of Edinburgh, UK
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21
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Jarett JK, Kingsbury DD, Dahlhausen KE, Ganz HH. Best Practices for Microbiome Study Design in Companion Animal Research. Front Vet Sci 2021; 8:644836. [PMID: 33898544 PMCID: PMC8062777 DOI: 10.3389/fvets.2021.644836] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 03/09/2021] [Indexed: 12/31/2022] Open
Abstract
The gut microbiome is a community of microorganisms that inhabits an animal host's gastrointestinal tract, with important effects on animal health that are shaped by multiple environmental, dietary, and host-associated factors. Clinical and dietary trials in companion animals are increasingly including assessment of the microbiome, but interpretation of these results is often hampered by suboptimal choices in study design. Here, we review best practices for conducting feeding trials or clinical trials that intend to study the effects of an intervention on the microbiota. Choices for experimental design, including a review of basic designs, controls, and comparison groups, are discussed in the context of special considerations necessary for microbiome studies. Diet is one of the strongest influences on the composition of gut microbiota, so applications specific to nutritional interventions are discussed in detail. Lastly, we provide specific advice for successful recruitment of colony animals and household pets into an intervention study. This review is intended to serve as a resource to academic and industry researchers, clinicians, and veterinarians alike, for studies that test many different types of interventions.
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22
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Saettone V, Biasato I, Radice E, Schiavone A, Bergero D, Meineri G. State-of-the-Art of the Nutritional Alternatives to the Use of Antibiotics in Humans and Monogastric Animals. Animals (Basel) 2020; 10:ani10122199. [PMID: 33255356 PMCID: PMC7759783 DOI: 10.3390/ani10122199] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/19/2020] [Accepted: 11/20/2020] [Indexed: 12/11/2022] Open
Abstract
Simple Summary Antibiotic resistance represents a worldwide recognized issue affecting both human and veterinary medicine, with a particular focus being directed towards monogastric animals destined for human consumption. This scenario is the result of frequent utilization of the antibiotics either for therapeutic purposes (humans and animals) or as growth promoters (farmed animals). Therefore, the search for nutritional alternatives has progressively been the object of significant efforts by the scientific community. So far, probiotics, prebiotics and postbiotics are considered the most promising products, as they are capable of preventing or treating gastrointestinal diseases as well as restoring a eubiosis condition after antibiotic-induced dysbiosis development. This review provides an updated state-of-the-art of these nutritional alternatives in both humans and monogastric animals. Abstract In recent years, the indiscriminate use of antibiotics has been perpetrated across human medicine, animals destined for zootechnical productions and companion animals. Apart from increasing the resistance rate of numerous microorganisms and generating multi-drug resistance (MDR), the nonrational administration of antibiotics causes sudden changes in the structure of the intestinal microbiota such as dysbiotic phenomena that can have a great clinical significance for both humans and animals. The aim of this review is to describe the state-of-the-art of alternative therapies to the use of antibiotics and their effectiveness in humans and monogastric animals (poultry, pigs, fish, rabbits, dogs and cats). In particular, those molecules (probiotics, prebiotics and postbiotics) which have a direct function on the gastrointestinal health are herein critically analysed in the prevention or treatment of gastrointestinal diseases or dysbiosis induced by the consumption of antibiotics.
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Affiliation(s)
- Vittorio Saettone
- Department of Veterinary Sciences, School of Agriculture and Veterinary Medicine, University of Turin, Grugliasco, Largo Braccini 2, 10095 Torino, Italy; (V.S.); (A.S.); (D.B.); (G.M.)
| | - Ilaria Biasato
- Department of Agricultural, Forestry and Food Sciences, School of Agriculture and Veterinary Medicine, University of Turin, Grugliasco, Largo Braccini 2, 10095 Torino, Italy
- Correspondence:
| | - Elisabetta Radice
- Department of Surgical Sciences, Medical School, University of Turin, Corso Dogliotti 14, 10126 Torino, Italy;
| | - Achille Schiavone
- Department of Veterinary Sciences, School of Agriculture and Veterinary Medicine, University of Turin, Grugliasco, Largo Braccini 2, 10095 Torino, Italy; (V.S.); (A.S.); (D.B.); (G.M.)
| | - Domenico Bergero
- Department of Veterinary Sciences, School of Agriculture and Veterinary Medicine, University of Turin, Grugliasco, Largo Braccini 2, 10095 Torino, Italy; (V.S.); (A.S.); (D.B.); (G.M.)
| | - Giorgia Meineri
- Department of Veterinary Sciences, School of Agriculture and Veterinary Medicine, University of Turin, Grugliasco, Largo Braccini 2, 10095 Torino, Italy; (V.S.); (A.S.); (D.B.); (G.M.)
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23
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Van den Abbeele P, Moens F, Pignataro G, Schnurr J, Ribecco C, Gramenzi A, Marzorati M. Yeast-Derived Formulations Are Differentially Fermented by the Canine and Feline Microbiome As Assessed in a Novel In Vitro Colonic Fermentation Model. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:13102-13110. [PMID: 31909618 DOI: 10.1021/acs.jafc.9b05085] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The current study evaluated the effect of five yeast-derived formulations (T1-T5) on microbial metabolism and composition of the canine and feline gut microbiota using a novel in vitro colonic incubation approach. This novel in vitro model allowed for growth of the entire spectrum of dog- and cat-derived bacteria from the inoculum, thus offering an excellent platform to evaluate effects of nutritional interventions on the gut microbiota. Further, yeast-derived ingredients differentially increased production of acetate, propionate, butyrate, ammonium, and branched short-chain fatty acids, with T5 and T1 consistently stimulating propionate and butyrate, respectively. 16S-targeted Illumina sequencing coupled with flow cytometry provided unprecedented high-resolution quantitative insights in canine and feline microbiota modulation by yeast-derived ingredients, revealing that effects on propionate production were related to Prevotellaceae, Tannerellaceae, Bacteroidaceae, and Veillonellaceae members, while effects on butyrate production were related to Erysipelotrichaceae, Lachnospiraceae, Ruminococcaceae, and Fusobacteriaceae. Overall, these findings strengthen the health-promoting potential of yeast-derived ingredients.
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Affiliation(s)
| | | | - Giulia Pignataro
- Department of Veterinary Clinical Sciences, University of Teramo, 64100 Teramo, Italy
| | - Judy Schnurr
- Sensient Global BioNutrients, Hoffman Estates, Illinois 60192, United States
| | - Cataldo Ribecco
- Research and Development Unit (NIL), C.I.A.M. srl, 63100 Ascoli Piceno, Italy
| | - Alessandro Gramenzi
- Department of Veterinary Clinical Sciences, University of Teramo, 64100 Teramo, Italy
| | - Massimo Marzorati
- ProDigest bvba, Technologiepark 82, 9052 Ghent, Belgium
- Center for Microbial Ecology and Technology (CMET), Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
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24
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Alessandri G, Argentini C, Milani C, Turroni F, Cristina Ossiprandi M, van Sinderen D, Ventura M. Catching a glimpse of the bacterial gut community of companion animals: a canine and feline perspective. Microb Biotechnol 2020; 13:1708-1732. [PMID: 32864871 PMCID: PMC7533323 DOI: 10.1111/1751-7915.13656] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 08/04/2020] [Accepted: 08/06/2020] [Indexed: 12/13/2022] Open
Abstract
Dogs and cats have gained a special position in human society by becoming our principal companion animals. In this context, efforts to ensure their health and welfare have increased exponentially, with in recent times a growing interest in assessing the impact of the gut microbiota on canine and feline health. Recent technological advances have generated new tools to not only examine the intestinal microbial composition of dogs and cats, but also to scrutinize the genetic repertoire and associated metabolic functions of this microbial community. The application of high-throughput sequencing techniques to canine and feline faecal samples revealed similarities in their bacterial composition, with Fusobacteria, Firmicutes and Bacteroidetes as the most prevalent and abundant phyla, followed by Proteobacteria and Actinobacteria. Although key bacterial members were consistently present in their gut microbiota, the taxonomic composition and the metabolic repertoire of the intestinal microbial population may be influenced by several factors, including diet, age and anthropogenic aspects, as well as intestinal dysbiosis. The current review aims to provide a comprehensive overview of the multitude of factors which play a role in the modulation of the canine and feline gut microbiota and that of their human owners with whom they share the same environment.
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Affiliation(s)
- Giulia Alessandri
- Department of Veterinary Medical ScienceUniversity of ParmaParmaItaly
| | - Chiara Argentini
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental SustainabilityUniversity of ParmaParmaItaly
| | - Christian Milani
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental SustainabilityUniversity of ParmaParmaItaly
- Microbiome Research HubUniversity of ParmaParmaItaly
| | - Francesca Turroni
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental SustainabilityUniversity of ParmaParmaItaly
- Microbiome Research HubUniversity of ParmaParmaItaly
| | - Maria Cristina Ossiprandi
- Department of Veterinary Medical ScienceUniversity of ParmaParmaItaly
- Microbiome Research HubUniversity of ParmaParmaItaly
| | - Douwe van Sinderen
- APC Microbiome Institute and School of Microbiology, Bioscience InstituteNational University of IrelandCorkIreland
| | - Marco Ventura
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental SustainabilityUniversity of ParmaParmaItaly
- Microbiome Research HubUniversity of ParmaParmaItaly
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Ziese AL, Suchodolski JS. Impact of Changes in Gastrointestinal Microbiota in Canine and Feline Digestive Diseases. Vet Clin North Am Small Anim Pract 2020; 51:155-169. [PMID: 33131916 DOI: 10.1016/j.cvsm.2020.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The intestinal microbiome is an important immune and metabolic organ in health and disease. Recent molecular and metabolomic approaches have provided a better characterization of different types of dysbiosis, including mucosa-adherent bacteria and functional changes in the microbiome. This article summarizes recent advances in assessment of dysbiosis, the importance of the bile acid-converting Clostridium hiranonis as an important beneficial bacterium in the canine gut, and different therapeutic approaches to dysbiosis.
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Affiliation(s)
- Anna-Lena Ziese
- Clinic of Small Animal Medicine, Ludwig Maximilian University of Munich, Veterinärstrasse 13, Munich 80539, Germany
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, College of Veterinary Medicine, Texas A&M University, 4474 TAMU, College Station, TX 77845, USA.
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Liu B, Piao X, Niu W, Zhang Q, Ma C, Wu T, Gu Q, Cui T, Li S. Kuijieyuan Decoction Improved Intestinal Barrier Injury of Ulcerative Colitis by Affecting TLR4-Dependent PI3K/AKT/NF-κB Oxidative and Inflammatory Signaling and Gut Microbiota. Front Pharmacol 2020; 11:1036. [PMID: 32848725 PMCID: PMC7403404 DOI: 10.3389/fphar.2020.01036] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 06/25/2020] [Indexed: 12/14/2022] Open
Abstract
Ethnopharmacological Relevance In Traditional Chinese medicine (TCM) theory, ulcerative colitis (UC) is associated with damp-heat, blood stasis, and intestinal vascular ischemia. Kuijieyuan decoction (KD) is a traditional Chinese medicine based on the above theory and used clinically to alleviate UC injury. Methods The main components of KD were analyzed by using high-pressure liquid chromatography (HPLC) and confirmed by UPLC-MS/MS. A UC model was established in rats by using dextran sulfate sodium (DSS) and dead rats (caused by DSS) were excluded from the study. Forty-eight rats were divided into 6 groups, health control (CG), UC model (UG), sulfasalazine (SG), low-dose KD (LG), middle-dose KD (MG), and high-dose KD (HG) groups. UC damage was assessed by hematoxylin and eosin staining and scan electron microscopy. We measured Toll-like receptor 4 (TLR4), p-phosphatidylinositol 3-kinase (PI3K), PI3K, p-Protein kinase B (AKT), AKT, p-nuclear factor kappa B (NF-κB), NF-κB, oxidative stress marker (superoxidase dismutase (SOD), catalase (CAT), glutathione peroxidases (GPx), and malondialdehyde) and inflammatory markers (tumor necrosis factor α (TNFα), interleukin (IL)-1, IL-6 and IL-10) in UC tissues. Gut microbiota was analyzed through16S rRNA sequencing. Results The main components of KD consist of gallic acid, paeoniflorin, emodin, berberine, coptisine, palmatine, jatrorrhizine, baicalein and baicalin. The UC model was successfully established by causing intestinal barrier injury with the loss of intestinal villi and destructed mitochondria of intestinal epithelial cells. Both sulfasalazine and KD treatment repaired UC injury, reduced the levels of malondialdehyde, TNFα, IL-1, IL-6, TLR4, p-PI3K, p-AKT, and p-NF-κB, and increased the levels of SOD, GPx, CAT, and IL-10. KD showed a protective function for the UC model in a dose-dependent way. The serum levels of paeoniflorin and baicalin had a strong relationship with the levels of inflammatory and oxidative stress biomarkers. KD treatment increased the proportion of Alloprevotella, Treponema, Prevotellaceae, and Prevotella, and reduced the proportion of Escherichia_Shigella and Desulfovibrio in gut microbiota. Conclusions KD improved intestinal barrier injury of ulcerative colitis, antioxidant and anti-inflammatory properties by affecting TLR4-dependent PI3K/AKT/NF-κB signaling possibly through the combination of its main compounds, and improving gut microbiota.
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Affiliation(s)
- Baohai Liu
- Department of Gastroenterology, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, China
| | - Xuehua Piao
- Department of Traditional Chinese Medicine, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, China
| | - Wei Niu
- Department of Gastroenterology, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, China
| | - Qingyu Zhang
- Department of Gastroenterology, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, China
| | - Chi Ma
- Department of Gastroenterology, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, China
| | - Tong Wu
- Department of Gastroenterology, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, China
| | - QiChang Gu
- Department of Gastroenterology, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, China
| | - Tingfang Cui
- Department of Gastroenterology, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, China
| | - Shuangdi Li
- Heart Disease Center, The Affiliated Hospital of Changchun University of Traditional Chinese Medicine, Changchun, China
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27
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Lyu Y, Su C, Verbrugghe A, Van de Wiele T, Martos Martinez-Caja A, Hesta M. Past, Present, and Future of Gastrointestinal Microbiota Research in Cats. Front Microbiol 2020; 11:1661. [PMID: 32793152 PMCID: PMC7393142 DOI: 10.3389/fmicb.2020.01661] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/25/2020] [Indexed: 12/17/2022] Open
Abstract
The relationship between microbial community and host has profound effects on the health of animals. A balanced gastrointestinal (GI) microbial population provides nutritional and metabolic benefits to its host, regulates the immune system and various signaling molecules, protects the intestine from pathogen invasion, and promotes a healthy intestinal structure and an optimal intestinal function. With the fast development of next-generation sequencing, molecular techniques have become standard tools for microbiota research, having been used to demonstrate the complex intestinal ecosystem. Similarly to other mammals, the vast majority of GI microbiota in cats (over 99%) is composed of the predominant bacterial phyla Firmicutes, Bacteroidetes, Actinobacteria, and Proteobacteria. Many nutritional and clinical studies have shown that cats' microbiota can be affected by several different factors including body condition, age, diet, and inflammatory diseases. All these factors have different size effects, and some of these may be very minor, and it is currently unknown how important these are. Further research is needed to determine the functional variations in the microbiome in disease states and in response to environmental and/or dietary modulations. Additionally, further studies are also needed to explain the intricate relationship between GI microbiota and the genetics and immunity of its host. This review summarizes past and present knowledge of the feline GI microbiota and looks into the future possibilities and challenges of the field.
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Affiliation(s)
- Yang Lyu
- Department of Nutrition, Genetics and Ethology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Chunxia Su
- Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Adronie Verbrugghe
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Tom Van de Wiele
- Center of Microbial Ecology and Technology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Ana Martos Martinez-Caja
- Department of Nutrition, Genetics and Ethology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Myriam Hesta
- Department of Nutrition, Genetics and Ethology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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28
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Tal M, Weese JS, Gomez DE, Hesta M, Steiner JM, Verbrugghe A. Bacterial fecal microbiota is only minimally affected by a standardized weight loss plan in obese cats. BMC Vet Res 2020; 16:112. [PMID: 32293441 PMCID: PMC7161297 DOI: 10.1186/s12917-020-02318-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 03/16/2020] [Indexed: 12/16/2022] Open
Abstract
Background Research in humans and mice suggests that obesity influences the abundance and diversity of gastrointestinal (GI) microbiota, and that an “obese microbiome” influences energy metabolism and fat storage in the host. Microbiota membership and composition have been previously assessed in healthy cats. However, research investigating the effects of obesity and weight loss on the cat’s fecal microbiota is limited. Therefore, this study’s objective was to evaluate differences in fecal microbial abundance and biodiversity, as well as serum cobalamin and folate concentrations in obese cats, before and after weight loss, and compare to lean cats. Fourteen lean and 17 obese healthy client-owned cats were fed a veterinary therapeutic weight loss food at maintenance energy requirement for 4 weeks. At the end of week 4, lean cats finished the study, whereas obese cats continued with a 10-week weight loss period on the same food, fed at individually-tailored weight loss energy requirements. Body weight and body condition score were recorded every 2 weeks throughout the study. At the end of each period, a fecal sample and food-consumption records were obtained from the owners, and serum cobalamin and folate concentrations were analysed. DNA was extracted from fecal samples, polymerase chain reaction (PCR) was performed, and products were sequenced using next-generation sequencing (Illumina MiSeq). Results No significant differences in the relative abundance of taxa and in biodiversity indices were observed between cats in either group (P > 0.05 for all tests). Nevertheless, some significantly enriched taxa, mainly belonging to Firmicutes, were noted in linear discriminant analysis effect size test in obese cats before weight loss compared to lean cats. Serum cobalamin concentrations were significantly higher in lean compared to obese cats both before and after weight loss. Serum folate concentrations were higher in obese cats before weight loss compared to after. Conclusions The association between feline obesity and the fecal bacterial microbiota was demonstrated in enriched taxa in obese cats compared to lean cats, which may be related to enhanced efficiency of energy-harvesting. However, in obese cats, the fecal microbial abundance and biodiversity were only minimally affected during the early phase of a standardized weight loss plan.
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Affiliation(s)
- Moran Tal
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada.,Present address: Royal Canin Canada, 100 Beiber Rd, N0B 2J0, Puslinch, Canada
| | - J Scott Weese
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Diego E Gomez
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Myriam Hesta
- Laboratory of Animal Nutrition, Faculty of Veterinary Medicine, Ghent University, Merelbeke, B-9820, Belgium
| | - Joerg M Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, 77843, TX, USA
| | - Adronie Verbrugghe
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada.
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29
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Xu H, Zhao F, Hou Q, Huang W, Liu Y, Zhang H, Sun Z. Metagenomic analysis revealed beneficial effects of probiotics in improving the composition and function of the gut microbiota in dogs with diarrhoea. Food Funct 2020; 10:2618-2629. [PMID: 31021333 DOI: 10.1039/c9fo00087a] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The aim of the present study was to evaluate the effects of probiotics on the composition and function of the gut microbiota in dogs with diarrhoea. Forty dogs with diarrhoea were randomly allocated to the treatment group or control group. Probiotics, containing Lactobacillus casei Zhang, Lactobacillus plantarum P-8, and Bifidobacterium animalis subsp. lactis V9, were only fed to 20 treated dogs for 60 days. The faecal samples of all dogs at day 0 and day 60 were analyzed using a metagenomic approach. The results showed a significantly higher microbial diversity and an obvious change in the structure of the gut microbiota in the treatment group. There was also an increase in the abundance of some beneficial bacteria in differently aged dogs, such as Lactobacillus johnsonii (P < 0.05), Lactobacillus reuteri (P < 0.01), Lactobacillus acidophilus (P < 0.05) and Butyricicoccus pullicaecorum (P < 0.05), and a reduction in the abundance of many opportunistic pathogenic bacteria such as Clostridium perfringens (P < 0.05) and Stenotrophomonas maltophilia (P < 0.05) with the supplementation of probiotics. Intriguingly, the correlated networks among some pathogenic bacteria decreased following the administration of probiotics. Additionally, metagenomic analysis revealed the upregulation of pathways involved in the metabolism of amino acids and biosynthesis of secondary metabolites, accompanied by the downregulation of pathways associated with virulence of pathogenic bacteria and cell signaling, suggesting that probiotics could improve the health of dogs with diarrhoea through regulation of the gut microbiota. Our research provides new information relevant to the treatment of diarrhoea in animals and humans.
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Affiliation(s)
- Haiyan Xu
- Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Key Laboratory of Dairy Products Processing, Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot 010018, P. R. China.
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30
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Wu Z, Zhou H, Li F, Zhang N, Zhu Y. Effect of dietary fiber levels on bacterial composition with age in the cecum of meat rabbits. Microbiologyopen 2019; 8:e00708. [PMID: 30085417 PMCID: PMC6528572 DOI: 10.1002/mbo3.708] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 05/12/2018] [Accepted: 07/09/2018] [Indexed: 01/21/2023] Open
Abstract
This study investigated the influence of dietary fiber levels on the growth performance, digestion, metabolism, and cecal microbial community of rabbits with different diets at different age. The different levels of dietary natural detergent fiber (NDF) were formulated accordingly: 400(A), 350(B), 300(C), 250(D) g/kg original matter basis, respectively; the different ages were 52, 62, and 72 days. With NDF increasing, the average daily feed intake (ADFI) and feed conversion rate (FCR) were increased, whereas average daily gain (ADG) and mortality were decreased (p < 0.05). The stomach relative weight, stomach content relative weight, cecal relative weight, and cecal content weight increased with increasing NDF (p < 0.05). The NH3 -N concentration of cecum dropped when the dietary NDF increased (p < 0.05). The diversity of the total microbiota increased significantly in Diets B, C (p = 0.011), and reached the lowest in 52 days for all diet groups. The richness index was decreased significantly in Diet A, D (p < 0.05) and in 62 days (p < 0.001), respectively. The phylum Firmicutes was higher (p < 0.01) in rabbits fed Diets B, C than Diets A, D and Bacteroidetes was highest in Diets C, D, and Proteobacteria was the highest in Diet A (p < 0.001). Among the classified genera, there were 14 that had levels of abundance of more than 1% and were commonly shared by all samples. Ruminococcus spp. that produced volatile fatty acid (VFA) abundance was highest from Diets B, C at 52 and 62 days. It is interesting to note that Bifidobacterium from Diet C was the most abundant genus during the entire experimental period (p < 0.01). The data from Venn diagrams, principal component analysis (PCA), and heat map plots of the bacterial communities showed that there were more groups of shared microbiota with aging. The above results indicate the cecal microbiota controlled by the 350 g/kg NDF diet can prevent gastrointestinal distress and exhibit good production performance.
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Affiliation(s)
- Zhenyu Wu
- College of Animal Science and TechnologyShandong Agricultural UniversityTaian CityShandong ProvinceChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTaian CityShandong ProvinceChina
| | - Hailiang Zhou
- College of Information Science and EngineeringShandong Agricultural UniversityTaian CityShandong ProvinceChina
| | - Fuchang Li
- College of Animal Science and TechnologyShandong Agricultural UniversityTaian CityShandong ProvinceChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTaian CityShandong ProvinceChina
- Shandong Provincial Engineering Technology Research Center of Animal Disease Control and PreventionShandong Agricultural UniversityTaian CityShandong ProvinceChina
| | - Nanbin Zhang
- College of Animal Science and TechnologyShandong Agricultural UniversityTaian CityShandong ProvinceChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTaian CityShandong ProvinceChina
| | - Yanli Zhu
- College of Animal Science and TechnologyShandong Agricultural UniversityTaian CityShandong ProvinceChina
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionShandong Agricultural UniversityTaian CityShandong ProvinceChina
- Shandong Provincial Engineering Technology Research Center of Animal Disease Control and PreventionShandong Agricultural UniversityTaian CityShandong ProvinceChina
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31
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Yilmaz B, Juillerat P, Øyås O, Ramon C, Bravo FD, Franc Y, Fournier N, Michetti P, Mueller C, Geuking M, Pittet VEH, Maillard MH, Rogler G, Wiest R, Stelling J, Macpherson AJ. Microbial network disturbances in relapsing refractory Crohn's disease. Nat Med 2019; 25:323-336. [PMID: 30664783 DOI: 10.1038/s41591-018-0308-z] [Citation(s) in RCA: 229] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 11/19/2018] [Indexed: 02/06/2023]
Abstract
Inflammatory bowel diseases (IBD) can be broadly divided into Crohn's disease (CD) and ulcerative colitis (UC) from their clinical phenotypes. Over 150 host susceptibility genes have been described, although most overlap between CD, UC and their subtypes, and they do not adequately account for the overall incidence or the highly variable severity of disease. Replicating key findings between two long-term IBD cohorts, we have defined distinct networks of taxa associations within intestinal biopsies of CD and UC patients. Disturbances in an association network containing taxa of the Lachnospiraceae and Ruminococcaceae families, typically producing short chain fatty acids, characterize frequently relapsing disease and poor responses to treatment with anti-TNF-α therapeutic antibodies. Alterations of taxa within this network also characterize risk of later disease recurrence of patients in remission after the active inflamed segment of CD has been surgically removed.
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Affiliation(s)
- Bahtiyar Yilmaz
- Maurice Müller Laboratories, Department for Biomedical Research, University of Bern, Bern, Switzerland.,Department of Visceral Surgery and Medicine, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Pascal Juillerat
- Maurice Müller Laboratories, Department for Biomedical Research, University of Bern, Bern, Switzerland.,Department of Visceral Surgery and Medicine, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Ove Øyås
- Department of Biosystems Science and Engineering and SIB Swiss Institute of Bioinformatics, ETH Zurich, Basel, Switzerland
| | - Charlotte Ramon
- Department of Biosystems Science and Engineering and SIB Swiss Institute of Bioinformatics, ETH Zurich, Basel, Switzerland
| | - Francisco Damian Bravo
- Department of Visceral Surgery and Medicine, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Yannick Franc
- Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital, Lausanne, Switzerland
| | - Nicolas Fournier
- Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital, Lausanne, Switzerland
| | - Pierre Michetti
- Gastroenterology La Source-Beaulieu, Lausanne, Switzerland.,Service of Gastroenterology and Hepatology, Department of Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Christoph Mueller
- Division of Experimental Pathology, Institute of Pathology, University of Bern, Bern, Switzerland
| | - Markus Geuking
- Maurice Müller Laboratories, Department for Biomedical Research, University of Bern, Bern, Switzerland
| | - Valerie E H Pittet
- Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital, Lausanne, Switzerland
| | - Michel H Maillard
- Gastroenterology La Source-Beaulieu, Lausanne, Switzerland.,Service of Gastroenterology and Hepatology, Department of Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Gerhard Rogler
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | | | - Reiner Wiest
- Maurice Müller Laboratories, Department for Biomedical Research, University of Bern, Bern, Switzerland.,Department of Visceral Surgery and Medicine, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Jörg Stelling
- Department of Biosystems Science and Engineering and SIB Swiss Institute of Bioinformatics, ETH Zurich, Basel, Switzerland
| | - Andrew J Macpherson
- Maurice Müller Laboratories, Department for Biomedical Research, University of Bern, Bern, Switzerland. .,Department of Visceral Surgery and Medicine, Bern University Hospital, University of Bern, Bern, Switzerland.
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Garraway K, Johannes CM, Bryan A, Peauroi J, Rossi G, Zhang M, Wang C, Allenspach K, Jergens AE. Relationship of the mucosal microbiota to gastrointestinal inflammation and small cell intestinal lymphoma in cats. J Vet Intern Med 2018; 32:1692-1702. [PMID: 30084202 PMCID: PMC6189339 DOI: 10.1111/jvim.15291] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 05/13/2018] [Accepted: 06/27/2018] [Indexed: 12/23/2022] Open
Abstract
Background The gastrointestinal (GI) microbiota in healthy cats is altered in IBD. Little research has been performed to identify whether specific bacterial groups are associated with small cell GI lymphoma (LSA). Hypothesis Mucosal bacteria, including Enterobacteriaceae and Fusobacterium spp., are abundant in intestinal biopsies of cats with small cell GI LSA compared to cats with IBD. Animals Fourteen cats with IBD and 14 cats with small cell GI LSA. Methods Retrospective case control study. A search of the medical records was performed to identify cats diagnosed with IBD and with GI LSA. Bacterial groups identified by FISH in GI biopsies were compared between cohorts and correlated to CD11b+ and NF‐κB expression. Results Fusobacterium spp. (median; IQR bacteria/region) were higher in cats with small cell GI LSA in ileal (527; 455.5 – 661.5; P = .046) and colonic (404.5; 328.8 – 455.5; P = .016) adherent mucus, and combined colonic compartments (free mucus, adherent mucus, attaching to epithelium) (8; 0 – 336; P = .017) compared to cats with IBD (ileum: 67; 31.5 – 259; colon: 142.5; 82.3 – 434.5; combined: 3; 0 – 34). Bacteroides spp. were higher in ileal adherent mucus (P = .036) and 3 combined ileal compartments (P = .034) of cats with small cell GI LSA. There were significant correlations between Fusobacterium spp. totals and CD11b+ cell (P = .009; rs .476) and NF‐κB expression (P = .004; rs .523). Conclusions The bacterial alterations appreciated might be influential in development of small cell GI LSA, and should drive further studies to elucidate the effects of microbial‐mediated inflammation on GI cancer progression.
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Affiliation(s)
- Kayode Garraway
- Iowa State University, College of Veterinary Medicine, Ames, IA
| | | | - Angela Bryan
- College of Veterinary Medicine, Iowa State University
| | - John Peauroi
- VDx Veterinary Diagnostics and Preclinical Research Services
| | - Giacomo Rossi
- School of Biosciences & Veterinary Medicine, University of Camerino, Italy
| | - Min Zhang
- Department of Statistics, College of Liberal Arts & Sciences, Iowa State University
| | - Chong Wang
- Department of Statistics, College of Liberal Arts & Sciences, Iowa State University
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Schmid SM, Suchodolski JS, Price JM, Tolbert MK. Omeprazole Minimally Alters the Fecal Microbial Community in Six Cats: A Pilot Study. Front Vet Sci 2018; 5:79. [PMID: 29713638 PMCID: PMC5911808 DOI: 10.3389/fvets.2018.00079] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 03/27/2018] [Indexed: 12/31/2022] Open
Abstract
Although they have historically been thought of as safe medications, proton pump inhibitors such as omeprazole have been associated with an increased risk of enteric, particularly Clostridium difficile, infections in people. In cats, omeprazole is often the first choice acid suppressant prescribed for the treatment of upper gastrointestinal (GI) ulceration and bleeding. Despite this, no studies to date have explored the effect of omeprazole on the feline fecal microbiome and metabolome. Therefore, the purpose of this pilot study was to evaluate the effect of prolonged omeprazole administration on the fecal microbiome and metabolome in healthy cats to identify targets for analysis in a larger subset of cats with GI disease. A within-subjects, before and after, pilot study was performed whereby six healthy adult cats received 60 days of placebo (250 mg lactose PO q 12 h) followed by 5 mg (0.83–1.6 mg/kg PO q 12 h) omeprazole. On days 0, 30, and 60 of placebo and omeprazole therapy, the fecal microbiome and metabolome were characterized utilizing 16S ribosomal RNA sequencing by Illumina and untargeted mass spectrometry-based methods, respectively. Omeprazole administration resulted in no significant changes in the global microbiome structure or richness. However, transient changes were noted in select bacterial groups with omeprazole administration resulting in an increased sequence percentage of Streptococcus, Lactobacillus, Clostridium, and Faecalibacterium spp. and a decreased sequence percentage of Bifidobacterium spp. Significance was lost for all of these bacterial groups after adjustment for multiple comparisons. The fecal concentration of O-acetylserine and aminomalonate decreased with omeprazole therapy, but significance was lost after adjustment for multiple comparisons. The results of this pilot study conclude that omeprazole has a mild and transient impact on the fecal microbiome and metabolome when orally administered to healthy cats for 60 days. Based on the findings of this pilot study, evaluation of the effect of omeprazole specifically on Streptococcus, Lactobacillus, Clostridium, Faecalibacterium, and Bifidobacterium spp. is warranted in cats with primary GI disease.
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Affiliation(s)
- Sarah M Schmid
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, The University of Tennessee, Knoxville, TN, United States
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
| | - Josh M Price
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, The University of Tennessee, Knoxville, TN, United States
| | - M K Tolbert
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, The University of Tennessee, Knoxville, TN, United States
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Barko P, McMichael M, Swanson K, Williams D. The Gastrointestinal Microbiome: A Review. J Vet Intern Med 2018; 32:9-25. [PMID: 29171095 PMCID: PMC5787212 DOI: 10.1111/jvim.14875] [Citation(s) in RCA: 341] [Impact Index Per Article: 56.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 08/30/2017] [Accepted: 10/12/2017] [Indexed: 12/14/2022] Open
Abstract
The gastrointestinal microbiome is a diverse consortium of bacteria, archaea, fungi, protozoa, and viruses that inhabit the gut of all mammals. Studies in humans and other mammals have implicated the microbiome in a range of physiologic processes that are vital to host health including energy homeostasis, metabolism, gut epithelial health, immunologic activity, and neurobehavioral development. The microbial genome confers metabolic capabilities exceeding those of the host organism alone, making the gut microbiome an active participant in host physiology. Recent advances in DNA sequencing technology and computational biology have revolutionized the field of microbiomics, permitting mechanistic evaluation of the relationships between an animal and its microbial symbionts. Changes in the gastrointestinal microbiome are associated with diseases in humans and animals including inflammatory bowel disease, asthma, obesity, metabolic syndrome, cardiovascular disease, immune-mediated conditions, and neurodevelopmental conditions such as autism spectrum disorder. While there remains a paucity of data regarding the intestinal microbiome in small animals, recent studies have helped to characterize its role in host animal health and associated disease states. This review is intended to familiarize small animal veterinarians with recent advances in the field of microbiomics and to prime them for a future in which diagnostic tests and therapies will incorporate these developments into clinical practice.
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Affiliation(s)
- P.C. Barko
- Veterinary Clinical MedicineUniversity of Illinois at Urbana‐ChampaignUrbanaIL
| | - M.A. McMichael
- Veterinary Clinical MedicineUniversity of Illinois at Urbana‐ChampaignUrbanaIL
| | - K.S. Swanson
- Veterinary Clinical MedicineUniversity of Illinois at Urbana‐ChampaignUrbanaIL
- Department of Animal SciencesUniversity of Illinois at Urbana‐ChampaignUrbanaIL
| | - D.A. Williams
- Veterinary Clinical MedicineUniversity of Illinois at Urbana‐ChampaignUrbanaIL
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Redfern A, Suchodolski J, Jergens A. Role of the gastrointestinal microbiota in small animal health and disease. Vet Rec 2017; 181:370. [PMID: 28916525 DOI: 10.1136/vr.103826] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 04/23/2017] [Accepted: 04/29/2017] [Indexed: 02/06/2023]
Abstract
There is a large and emerging interest in the role of the gastrointestinal microbiota in health and disease. This paper serves to review the current knowledge and recommendations of the gastrointestinal microbiota in health and gastrointestinal disease. Further, this review evaluates the current literature and suggests guidelines for faecal microbial transplantation, a novel therapy for dysbiosis in veterinary medicine.
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Affiliation(s)
- Alana Redfern
- Department of Internal Medicine, BluePearl Veterinary Partners, New York City, New York, USA
| | - Jan Suchodolski
- Department of Small Animal Clinical Sciences, Texas A&M University, College Station, Texas, USA
| | - Albert Jergens
- Department of Small Animal Internal Medicine, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
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Tal M, Verbrugghe A, Gomez DE, Chau C, Weese JS. The effect of storage at ambient temperature on the feline fecal microbiota. BMC Vet Res 2017; 13:256. [PMID: 28821259 PMCID: PMC5563020 DOI: 10.1186/s12917-017-1188-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 08/10/2017] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Feline fecal microbiota analyses can potentially be impacted by a variety of factors such as sample preparation, sequencing method and bioinformatics analyses. Another potential influence is changes in the microbiota from storage of samples prior to processing. This study examined the effect of ambient temperature exposure on the feline fecal microbiota composition. Fecal samples were collected from 12 healthy cats, within 15 min after defecation. Samples were aliquoted and the first aliquot was frozen at -80 °C within 1 hour of defecation. Remaining aliquots were maintained at ambient temperature (20 to 23 °C) and frozen at -80 °C at 6, 12, 24, 36, 48, 72 and 96 h after collection. DNA was extracted from all aliquots, and polymerase chain reaction (PCR). The PCR products were sequenced with next-generation sequencing (Illumina MiSeq). RESULTS No significant differences were observed in alpha and beta biodiversity indexes, as well as relative abundance of different taxa over time (P > 0.05 for all tests between time points). Principal coordinate analyses demonstrated that samples cluster mainly by cat, with no significant differences between time points (AMOVA, P > 0.05; HOMOVA, P > 0.05). Linear discriminant analysis effect size method was performed and failed to detect any enriched taxa, between time points. Random forest algorithm analysis indicated homogeneity across time points. CONCLUSIONS Although existing evidence from human fecal storage studies is contradictory, a recent study in companion animals agreed with the current study, demonstrating that maintenance of feline fecal samples at ambient temperature for up to 4 days has no effect on the bacterial membership and structure.
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Affiliation(s)
- Moran Tal
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1 Canada
| | - Adronie Verbrugghe
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1 Canada
| | - Diego E. Gomez
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1 Canada
- College of Veterinary Medicine, University of Florida, Gainesville, Florida USA
| | - Charlotte Chau
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1 Canada
| | - J. Scott Weese
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1 Canada
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Jugan MC, Rudinsky AJ, Parker VJ, Gilor C. Use of probiotics in small animal veterinary medicine. J Am Vet Med Assoc 2017; 250:519-528. [DOI: 10.2460/javma.250.5.519] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Henson LH, Songsasen N, Waddell W, Wolf KN, Emmons L, Gonzalez S, Freeman E, Maldonado J. Characterization of genetic variation and basis of inflammatory bowel disease in the Toll-like receptor 5 gene of the red wolf and the maned wolf. ENDANGER SPECIES RES 2017. [DOI: 10.3354/esr00790] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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39
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Suchodolski JS. Diagnosis and interpretation of intestinal dysbiosis in dogs and cats. Vet J 2016; 215:30-7. [DOI: 10.1016/j.tvjl.2016.04.011] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 04/12/2016] [Accepted: 04/21/2016] [Indexed: 02/09/2023]
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40
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Blake AB, Suchodolski JS. Importance of gut microbiota for the health and disease of dogs and cats. Anim Front 2016. [DOI: 10.2527/af.2016-0032] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Amanda B. Blake
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX 77843-4474
| | - Jan S. Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX 77843-4474
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Abstract
The domestication and urbanization of dogs and cats has dramatically altered their environment and behavior. Human and pet obesity is a global concern, particularly in developed countries. An increased incidence of chronic disease is associated with obesity secondary to low-grade systemic inflammation. This article reviews current research into the genetic, dietary, and physiologic factors associated with obesity, along with use of "omics" technology to better understand and characterize this disease.
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Affiliation(s)
- Beth Hamper
- Hamper Veterinary Nutritional Consulting, 9160 Crestview Drive, Indianapolis, IN 46240, USA.
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42
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Fragkou FC, Adamama-Moraitou KK, Poutahidis T, Prassinos NN, Kritsepi-Konstantinou M, Xenoulis PG, Steiner JM, Lidbury JA, Suchodolski JS, Rallis TS. Prevalence and Clinicopathological Features of Triaditis in a Prospective Case Series of Symptomatic and Asymptomatic Cats. J Vet Intern Med 2016; 30:1031-45. [PMID: 27296565 PMCID: PMC5089651 DOI: 10.1111/jvim.14356] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 04/26/2016] [Accepted: 05/16/2016] [Indexed: 12/25/2022] Open
Abstract
Background The term triaditis designates the concurrent presence of idiopathic inflammatory bowel disease (IBD), cholangitis, and pancreatitis in cats. Hypothesis/Objectives The histopathology of concurrent, but often subclinical, inflammatory processes in the small intestine, liver, and pancreas of cats is poorly described. We aimed to investigate the frequency of enteritis, cholangitis, pancreatitis, or some combination of these in symptomatic and asymptomatic cats, compare clinicopathological features, and correlate histopathological with laboratory findings. Animals Domestic cats (27 symptomatic, 20 asymptomatic, and 8 normal). Methods Prospective study. Physical examination, laboratory variables (CBC, serum biochemistry profile, serum thyroxine concentration, serum feline trypsin‐like immunoreactivity [fTLI], feline lipase immunoreactivity [fPLI, as measured by Spec fPL®], urinalysis, and fecal analysis), imaging, and histopathological examinations were conducted. Feline liver, pancreas, and small intestine were biopsied during laparotomy. Results Inflammatory lesions were detected in 47 cats (27 symptomatic, 20 asymptomatic). In total, 20 cats had histopathologic lesions of IBD (13/47, 27.7%), cholangitis (6/47, 12.8%), or pancreatitis (1/47, 2.1%) alone, or inflammation involving >1 organ (27/47, 57.4%). More specifically, 16/47 cats (34.0%) had concurrent lesions of IBD and cholangitis, 3/47 (6.4%) of IBD and pancreatitis, and 8/47 cats (17%) of triaditis. Triaditis was identified only in symptomatic cats (8/27, 29.6%). A mild, positive correlation was detected between the severity (score) of IBD lesions and the number of comorbidities (rho = +0.367, P = .022). Conclusions and Clinical Importance Histopathological evidence of IBD or IBD with comorbidities was detected in both symptomatic and asymptomatic cats. The possibility of triaditis should be considered in symptomatic cats with severe IBD.
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Affiliation(s)
- F C Fragkou
- Medicine Unit, Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - K K Adamama-Moraitou
- Medicine Unit, Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - T Poutahidis
- Laboratory of Pathology, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - N N Prassinos
- Surgery and Obstetrics Unit, Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - M Kritsepi-Konstantinou
- Diagnostic Laboratory, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - P G Xenoulis
- Gastrointestinal Laboratory, Texas A&M University, College Station, TX, USA
| | - J M Steiner
- Gastrointestinal Laboratory, Texas A&M University, College Station, TX, USA
| | - J A Lidbury
- Gastrointestinal Laboratory, Texas A&M University, College Station, TX, USA
| | - J S Suchodolski
- Gastrointestinal Laboratory, Texas A&M University, College Station, TX, USA
| | - T S Rallis
- Medicine Unit, Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Barka EA, Vatsa P, Sanchez L, Gaveau-Vaillant N, Jacquard C, Meier-Kolthoff JP, Klenk HP, Clément C, Ouhdouch Y, van Wezel GP. Taxonomy, Physiology, and Natural Products of Actinobacteria. Microbiol Mol Biol Rev 2016; 80:1-43. [PMID: 26609051 PMCID: PMC4711186 DOI: 10.1128/mmbr.00019-15] [Citation(s) in RCA: 896] [Impact Index Per Article: 112.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Actinobacteria are Gram-positive bacteria with high G+C DNA content that constitute one of the largest bacterial phyla, and they are ubiquitously distributed in both aquatic and terrestrial ecosystems. Many Actinobacteria have a mycelial lifestyle and undergo complex morphological differentiation. They also have an extensive secondary metabolism and produce about two-thirds of all naturally derived antibiotics in current clinical use, as well as many anticancer, anthelmintic, and antifungal compounds. Consequently, these bacteria are of major importance for biotechnology, medicine, and agriculture. Actinobacteria play diverse roles in their associations with various higher organisms, since their members have adopted different lifestyles, and the phylum includes pathogens (notably, species of Corynebacterium, Mycobacterium, Nocardia, Propionibacterium, and Tropheryma), soil inhabitants (e.g., Micromonospora and Streptomyces species), plant commensals (e.g., Frankia spp.), and gastrointestinal commensals (Bifidobacterium spp.). Actinobacteria also play an important role as symbionts and as pathogens in plant-associated microbial communities. This review presents an update on the biology of this important bacterial phylum.
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Affiliation(s)
- Essaid Ait Barka
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | - Parul Vatsa
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | - Lisa Sanchez
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | - Nathalie Gaveau-Vaillant
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | - Cedric Jacquard
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | | | - Hans-Peter Klenk
- School of Biology, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Christophe Clément
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | - Yder Ouhdouch
- Faculté de Sciences Semlalia, Université Cadi Ayyad, Laboratoire de Biologie et de Biotechnologie des Microorganismes, Marrakesh, Morocco
| | - Gilles P van Wezel
- Molecular Biotechnology, Institute of Biology, Sylvius Laboratories, Leiden University, Leiden, The Netherlands
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The Role of the Microbiota in Feline Inflammatory Bowel Disease. AUGUST'S CONSULTATIONS IN FELINE INTERNAL MEDICINE, VOLUME 7 2016. [PMCID: PMC7152113 DOI: 10.1016/b978-0-323-22652-3.00010-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract
Domestic cats are obligate carnivores and in this light hindgut fermentation has been considered unimportant in this species. However, a diverse microbiota has been found in the small and large intestines of domestic cats. Additionally, in vitro and in vivo studies support the hypothesis that microbial fermentation is significant in felines with potential benefits to the host. Results on microbiota composition and microbial counts in different regions of the feline gastrointestinal tract are compiled, including a description of modulating host and technical factors. Additionally, the effects of dietary fibre supplementation on the microbiota composition are described. In a second section, in vitro studies, using inocula from fresh feline faeces and focusing on the fermentation characteristics of diverse plant substrates, are described. In vivo studies have investigated the effects of dietary fibre on a broad range of physiological outcomes. Results of this research, together with studies on effects of plant fibre on colonic morphology and function, protein and carbohydrate metabolism, and the effects of plant fibre on disease conditions that require a decrease in dietary protein intake, are shown in a third section of the present review. Conclusively, for fructans and beet pulp, for example, diverse beneficial effects have been demonstrated in the domestic cat. Both dietary fibre sources are regularly used in the pet food industry. More research is warranted to reveal the potential benefits of other fibre sources that can be used on a large scale in feline diets for healthy and diseased cats.
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Rodrigues Hoffmann A, Proctor LM, Surette MG, Suchodolski JS. The Microbiome: The Trillions of Microorganisms That Maintain Health and Cause Disease in Humans and Companion Animals. Vet Pathol 2015. [PMID: 26220947 DOI: 10.1177/0300985815595517] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The microbiome is the complex collection of microorganisms, their genes, and their metabolites, colonizing the human and animal mucosal surfaces, digestive tract, and skin. It is now well known that the microbiome interacts with its host, assisting in digestion and detoxification, supporting immunity, protecting against pathogens, and maintaining health. Studies published to date have demonstrated that healthy individuals are often colonized with different microbiomes than those with disease involving various organ systems. This review covers a brief history of the development of the microbiome field, the main objectives of the Human Microbiome Project, and the most common microbiomes inhabiting the human respiratory tract, companion animal digestive tract, and skin in humans and companion animals. The main changes in the microbiomes in patients with pulmonary, gastrointestinal, and cutaneous lesions are described.
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Affiliation(s)
- A Rodrigues Hoffmann
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - L M Proctor
- National Human Genome Research Institute, National Institute of Health, Bethesda, MD, USA
| | - M G Surette
- Department of Medicine, Department of Biochemistry and Biomedical Sciences, Faculty of Health Sciences, Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON, Canada
| | - J S Suchodolski
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
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Guard BC, Barr JW, Reddivari L, Klemashevich C, Jayaraman A, Steiner JM, Vanamala J, Suchodolski JS. Characterization of microbial dysbiosis and metabolomic changes in dogs with acute diarrhea. PLoS One 2015; 10:e0127259. [PMID: 26000959 PMCID: PMC4441376 DOI: 10.1371/journal.pone.0127259] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 04/14/2015] [Indexed: 12/19/2022] Open
Abstract
Limited information is available regarding the metabolic consequences of intestinal dysbiosis in dogs with acute onset of diarrhea. The aim of this study was to evaluate the fecal microbiome, fecal concentrations of short-chain fatty acids (SCFAs), as well as serum and urine metabolites in healthy dogs (n=13) and dogs with acute diarrhea (n=13). The fecal microbiome, SCFAs, and serum/urine metabolite profiles were characterized by 454-pyrosequencing of the 16S rRNA genes, GC/MS, and untargeted and targeted metabolomics approach using UPLC/MS and HPLC/MS, respectively. Significantly lower bacterial diversity was observed in dogs with acute diarrhea in regards to species richness, chao1, and Shannon index (p=0.0218, 0.0176, and 0.0033; respectively). Dogs with acute diarrhea had significantly different microbial communities compared to healthy dogs (unweighted Unifrac distances, ANOSIM p=0.0040). While Bacteroidetes, Faecalibacterium, and an unclassified genus within Ruminococcaceae were underrepresented, the genus Clostridium was overrepresented in dogs with acute diarrhea. Concentrations of fecal propionic acid were significantly decreased in acute diarrhea (p=0.0033), and were correlated to a decrease in Faecalibacterium (ρ=0.6725, p=0.0332). The predicted functional gene content of the microbiome (PICRUSt) revealed overrepresentations of genes for transposase enzymes as well as methyl accepting chemotaxis proteins in acute diarrhea. Serum concentrations of kynurenic acid and urine concentrations of 2-methyl-1H-indole and 5-Methoxy-1H-indole-3-carbaldehyde were significantly decreased in acute diarrhea (p=0.0048, 0.0185, and 0.0330, respectively). These results demonstrate that the fecal dysbiosis present in acute diarrhea is associated with altered systemic metabolic states.
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Affiliation(s)
- Blake C. Guard
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, United States of America
| | - James W. Barr
- Emergency and Critical Care, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, United States of America
| | - Lavanya Reddivari
- Department of Plant Science, Penn State University, University Park, Pennsylvania, United States of America
| | - Cory Klemashevich
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, United States of America
| | - Arul Jayaraman
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, United States of America
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas, United States of America
| | - Jörg M. Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, United States of America
| | - Jairam Vanamala
- Department of Food Science, Penn State University, University Park, Pennsylvania, United States of America
- The Penn State Hershey Cancer Institute, Hershey, Pennsylvania, United States of America
| | - Jan S. Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
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Suchodolski JS, Foster ML, Sohail MU, Leutenegger C, Queen EV, Steiner JM, Marks SL. The fecal microbiome in cats with diarrhea. PLoS One 2015; 10:e0127378. [PMID: 25992741 PMCID: PMC4437779 DOI: 10.1371/journal.pone.0127378] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 04/15/2015] [Indexed: 02/06/2023] Open
Abstract
Recent studies have revealed that microbes play an important role in the pathogenesis of gastrointestinal (GI) diseases in various animal species, but only limited data is available about the microbiome in cats with GI disease. The aim of this study was to evaluate the fecal microbiome in cats with diarrhea. Fecal samples were obtained from healthy cats (n = 21) and cats with acute (n = 19) or chronic diarrhea (n = 29) and analyzed by sequencing of 16S rRNA genes, and PICRUSt was used to predict the functional gene content of the microbiome. Linear discriminant analysis (LDA) effect size (LEfSe) revealed significant differences in bacterial groups between healthy cats and cats with diarrhea. The order Burkholderiales, the families Enterobacteriaceae, and the genera Streptococcus and Collinsella were significantly increased in diarrheic cats. In contrast the order Campylobacterales, the family Bacteroidaceae, and the genera Megamonas, Helicobacter, and Roseburia were significantly increased in healthy cats. Phylum Bacteroidetes was significantly decreased in cats with chronic diarrhea (>21 days duration), while the class Erysipelotrichi and the genus Lactobacillus were significantly decreased in cats with acute diarrhea. The observed changes in bacterial groups were accompanied by significant differences in functional gene contents: metabolism of fatty acids, biosynthesis of glycosphingolipids, metabolism of biotin, metabolism of tryptophan, and ascorbate and aldarate metabolism, were all significantly (p<0.001) altered in cats with diarrhea. In conclusion, significant differences in the fecal microbiomes between healthy cats and cats with diarrhea were identified. This dysbiosis was accompanied by changes in bacterial functional gene categories. Future studies are warranted to evaluate if these microbial changes correlate with changes in fecal concentrations of microbial metabolites in cats with diarrhea for the identification of potential diagnostic or therapeutic targets.
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Affiliation(s)
- Jan S. Suchodolski
- Gastrointestinal Laboratory, Texas A&M University, College Station, TX, United States of America
- * E-mail:
| | - Mary L. Foster
- Gastrointestinal Laboratory, Texas A&M University, College Station, TX, United States of America
| | - Muhammad U. Sohail
- Department of Physiology, Government College University, Faisalabad, Pakistan
| | | | - Erica V. Queen
- MarQueen Animal Clinic, Roseville, CA, United States of America
| | - Jörg M. Steiner
- Gastrointestinal Laboratory, Texas A&M University, College Station, TX, United States of America
| | - Stanley L. Marks
- Department of Medicine & Epidemiology, School of Veterinary Medicine, University of California, Davis, CA, United States of America
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Grześkowiak Ł, Endo A, Beasley S, Salminen S. Microbiota and probiotics in canine and feline welfare. Anaerobe 2015; 34:14-23. [PMID: 25863311 PMCID: PMC7111060 DOI: 10.1016/j.anaerobe.2015.04.002] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Revised: 04/02/2015] [Accepted: 04/05/2015] [Indexed: 12/26/2022]
Abstract
Dogs and cats have been cohabiting with us for thousands of years. They are the major human companions. Today, dogs and cats live in urban areas. Cats and most dogs are on high carbohydrate diets and face similar life-style challenges as the human beings. The health and well-being of companion animals, just as their owners, depends on the gut microbes. Providing a proper care and nutritionally balanced diet to companion animals is recognised as a part of our responsibility to maintain the health and well being of our pet. However, as microbiota differences may facilitate exposure to pathogens and harmful environmental influences, it is prudent to search for novel tools to protect dogs and cats and at the same time the human owners from pathogens. Specific probiotic strains and/or their defined combinations may be useful in the canine and feline nutrition, therapy, and care. Probiotic supplementations have been successful in the prevention and treatment of acute gastroenteritis, treatment of IBD, and prevention of allergy in companion animals. New challenges for probiotic applications include maintenance of obesity and overweight, urogenital tract infections, Helicobacter gastritis and parasitic infections. The probiotics of human origin appear to be among the new promising tools for the maintenance of pets' health. However, the host-derived microorganisms might be the most appropriate probiotic source. Therefore, more controlled trials are needed to characterise new and safe probiotic preparations with an impact on general health and well being as well as health maintenance in dogs and cats.
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Affiliation(s)
| | - Akihito Endo
- Department of Food and Cosmetic Science, Faculty of Bioindustry, Tokyo University of Agriculture, Hokkaido, Japan
| | | | - Seppo Salminen
- Functional Foods Forum, Univeristy of Turku, Turku, Finland
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Osto M, Lutz TA. Translational value of animal models of obesity-Focus on dogs and cats. Eur J Pharmacol 2015; 759:240-52. [PMID: 25814247 DOI: 10.1016/j.ejphar.2015.03.036] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 01/15/2015] [Accepted: 03/12/2015] [Indexed: 12/11/2022]
Abstract
A prolonged imbalance between a relative increase in energy intake over a decrease in energy expenditure results in the development of obesity; extended periods of a positive energy balance eventually lead to the accumulation of abnormally high amounts of fat in adipose tissue but also in other organs. Obesity is considered a clinical state of impaired general heath in which the excessive increase in adipose tissue mass may be associated with metabolic disorders such as type 2 diabetes mellitus, hyperlipidemia, hypertension and cardiovascular diseases. This review discusses briefly the use of animal models for the study of obesity and its comorbidities. Generally, most studies are performed with rodents, such as diet induced obesity and genetic models. Here, we focus specifically on two different species, namely dogs and cats. Obese dogs and cats show many features of human obesity. Interestingly, however, dogs and cats differ from each other in certain aspects because even though obese dogs may become insulin resistant, this does not result in the development of diabetes mellitus. In fact, diabetes in dogs is typically not associated with obesity because dogs present a type 1 diabetes-like syndrome. On the other hand, obese cats often develop diabetes mellitus which shares many features with human type 2 diabetes; feline and human diabetes are similar in respect to their pathophysiology, underlying risk factors and treatment strategies. Our review discusses genetic and endocrine factors in obesity, discusses obesity induced changes in lipid metabolism and includes some recent findings on the role of gut microbiota in obesity. Compared to research in rodent models, the array of available techniques and tools is unfortunately still rather limited in dogs and cats. Hence, even though physiological and pathophysiological phenomena are well described in dogs and cats, the underlying mechanisms are often not known and studies investigating causality specifically are scarce.
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Affiliation(s)
- Melania Osto
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, CH 8057 Zurich, Switzerland
| | - Thomas A Lutz
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, CH 8057 Zurich, Switzerland; Institute of Laboratory Animal Science, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 190, CH 8057 Zurich, Switzerland; Zurich Center for Integrative Human Physiology, University of Zurich, Winterthurerstrasse 190, CH 8057 Zurich, Switzerland.
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