1
|
Stone CB, Rudinsky AJ, Urion RJ, March SB, Winston JA. Gastrointestinal release site for delayed release and gelatin capsules in healthy dogs. J Vet Pharmacol Ther 2024. [PMID: 38519447 DOI: 10.1111/jvp.13439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/18/2024] [Accepted: 03/01/2024] [Indexed: 03/25/2024]
Abstract
Gelatin capsules deliver their contents to the stomach, while delayed-release (DR) capsules are designed to allow delivery to the small intestine. This study evaluated the gastrointestinal release site of DR capsules in six healthy adult dogs compared to gelatin capsules. Both gelatin and DR capsules were filled with barium-impregnated polyethylene spheres (BIPS™), and following enteral administration, release site was assessed using abdominal radiographs at baseline, immediately after ingestion, 15 min post-ingestion, 30 min post-ingestion, and then every 30 min thereafter. The evaluated phases included fasted conditions (phase 1, n = 6), increased meal size (phase 2, n = 2), double encapsulation (phase 3, n = 2), and altered capsule size (phase 4, n = 1). The released site was the stomach in all phases for both capsule types. In phase 1, DR capsules had a significantly prolonged time (median 60 min, range 60-90) to release BIPS™ compared to gelatin capsules (15 min, range 15-30; p = .03). In phase 2 (full meal size), 3 (double encapsulation), and 4 (smaller capsule size) pilot studies, release time was prolonged but still occurred in the stomach. This is similar to the release site for gelatin capsules but differs from the release site for DR capsules in people. This has implications for pharmacologic outcomes for products that are affected by gastric physiology (e.g. fecal microbiota transplantation). Based on this pilot data, clinicians and researchers should not assume DR capsules will allow for intestinal delivery of contents in dogs. Future studies should be conducted on larger and varied populations of dogs.
Collapse
Affiliation(s)
- Charles B Stone
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
- Comparative Hepatobiliary and Intestinal Research Program (CHIRP), College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Adam J Rudinsky
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
- Comparative Hepatobiliary and Intestinal Research Program (CHIRP), College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Rebecca J Urion
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Simone B March
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Jenessa A Winston
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
- Comparative Hepatobiliary and Intestinal Research Program (CHIRP), College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
| |
Collapse
|
2
|
Nealon NJ, Summers S, Quimby J, Winston JA. Untargeted metabolomic profiling of serum from client-owned cats with early and late-stage chronic kidney disease. Sci Rep 2024; 14:4755. [PMID: 38413739 PMCID: PMC10899575 DOI: 10.1038/s41598-024-55249-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 02/21/2024] [Indexed: 02/29/2024] Open
Abstract
Evaluation of the metabolome could discover novel biomarkers of disease. To date, characterization of the serum metabolome of client-owned cats with chronic kidney disease (CKD), which shares numerous pathophysiological similarities to human CKD, has not been reported. CKD is a leading cause of feline morbidity and mortality, which can be lessened with early detection and appropriate treatment. Consequently, there is an urgent need for early-CKD biomarkers. The goal of this cross-sectional, prospective study was to characterize the global, non-targeted serum metabolome of cats with early versus late-stage CKD compared to healthy cats. Analysis revealed distinct separation of the serum metabolome between healthy cats, early-stage and late-stage CKD. Differentially abundant lipid and amino acid metabolites were the primary contributors to these differences and included metabolites central to the metabolism of fatty acids, essential amino acids and uremic toxins. Correlation of multiple lipid and amino acid metabolites with clinical metadata important to CKD monitoring and patient treatment (e.g. creatinine, muscle condition score) further illustrates the relevance of exploring these metabolite classes further for their capacity to serve as biomarkers of early CKD detection in both feline and human populations.
Collapse
Affiliation(s)
- Nora Jean Nealon
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, 43210, USA
| | - Stacie Summers
- Department of Clinical Sciences, Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR, 97331, USA
| | - Jessica Quimby
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, 43210, USA
| | - Jenessa A Winston
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, 43210, USA.
| |
Collapse
|
3
|
Rowe JC, Winston JA. Collaborative Metabolism: Gut Microbes Play a Key Role in Canine and Feline Bile Acid Metabolism. Vet Sci 2024; 11:94. [PMID: 38393112 PMCID: PMC10892723 DOI: 10.3390/vetsci11020094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 01/31/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024] Open
Abstract
Bile acids, produced by the liver and secreted into the gastrointestinal tract, are dynamic molecules capable of impacting the overall health of dogs and cats in many contexts. Importantly, the gut microbiota metabolizes host primary bile acids into chemically distinct secondary bile acids. This review explores the emergence of new literature connecting microbial-derived bile acid metabolism to canine and feline health and disease. Moreover, this review highlights multi-omic methodologies for translational research as an area for continued growth in veterinary medicine aimed at accelerating microbiome science and medicine as it pertains to bile acid metabolism in dogs and cats.
Collapse
Affiliation(s)
- John C. Rowe
- Department of Veterinary Clinical Sciences, The Ohio State University College of Veterinary Medicine, Columbus, OH 43210, USA;
- Comparative Hepatobiliary Intestinal Research Program (CHIRP), The Ohio State University College of Veterinary Medicine, Columbus, OH 43210, USA
| | - Jenessa A. Winston
- Department of Veterinary Clinical Sciences, The Ohio State University College of Veterinary Medicine, Columbus, OH 43210, USA;
- Comparative Hepatobiliary Intestinal Research Program (CHIRP), The Ohio State University College of Veterinary Medicine, Columbus, OH 43210, USA
| |
Collapse
|
4
|
Francillon WB, Winston JA, Schreeg ME, Lilly ML, Parker VJ, Rudinsky AJ. Clinician prescribing practices for managing canine idiopathic acute diarrhea are not evidence based. J Am Vet Med Assoc 2023; 261:1853-1861. [PMID: 37669749 DOI: 10.2460/javma.23.06.0313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 08/12/2023] [Indexed: 09/07/2023]
Abstract
Objective To characterize clinician preferences and justification for preferred methods for managing canine idiopathic acute diarrhea (IAD) and compare results to evidence-based literature. sample 284 surveys from veterinarians in small animal first-opinion practice. Methods Veterinarians were asked to complete a survey (61 questions) including background demographic information, practice type and location, duration in practice, and management questions for canine IAD pertaining to nutritional, probiotic, antimicrobial, antidiarrheal, benign neglect, and other therapies. The survey was available between May 5, 2021, and August 30, 2021. Results Respondents reported that their preferred first-line therapy for canine IAD included dietary modification (41.3% of respondents), probiotics (20.1%), antimicrobials (21.2%), antidiarrheal medications (13.0%), and benign neglect (4.3%). The percentage of respondents who reported each therapy as either extremely effective or very effective for canine IAD varied by treatment, as follows: antimicrobials (75.2%), dietary modification (59.13%), antidiarrheal medications (42.5%), probiotics (35.5%), and benign neglect (6.52%). Perceptions of effectiveness, efficiency of treatment, and clinician justification for use were variable among treatments. Reported practice styles were occasionally in disagreement with evidence-based methods of canine IAD management. Clinical Relevance Current clinical management of IAD is not consistently in agreement with evidence-based recommendations. The results of this study underscore the continued need to evaluate veterinary prescribing practice trends compared to evidence-based recommendations and promote dissemination of new information.
Collapse
Affiliation(s)
- Widmaier B Francillon
- 1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- 2Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Jenessa A Winston
- 1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- 2Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Megan E Schreeg
- 2Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- 3Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - M Leanne Lilly
- 1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- 2Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Valerie J Parker
- 1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- 2Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Adam J Rudinsky
- 1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- 2Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| |
Collapse
|
5
|
Rowe JC, Winston JA, Parker VJ, McCool KE, Suchodolski JS, Lopes R, Steiner JM, Gilor C, Rudinsky AJ. Gut microbiota promoting propionic acid production accompanies diet-induced intentional weight loss in cats. Res Sq 2023:rs.3.rs-3273531. [PMID: 37693421 PMCID: PMC10491335 DOI: 10.21203/rs.3.rs-3273531/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Rodent models and human clinical studies have shown gut microbiota-derived short-chain fatty acids (SCFAs) play roles in obesity and insulin resistance. These roles have been minimally explored in cats, where in the USA an estimated 60% of cats are overweight or obese. Overweight/obese research cats (n = 7) were transitioned from a maintenance diet to a reduced calorie diet fed ad libitum for seven days, then calories were restricted to achieve 1-2% weight loss per week for an additional 77 days. Cats then received their original maintenance diet again for 14 days. Significant intentional weight loss was noted after calorie restriction (adjusted p < 0.0001). 16S rRNA gene amplicon sequencing and targeted SCFA metabolomics were performed on fecal samples. Fecal microbial community structure significantly differed between the four study phases (PERMANOVA p = 0.011). Fecal propionic acid was significantly higher during diet-induced weight loss (adjusted p < 0.05). Spearman correlation revealed the relative abundances of Prevotella 9 copri (ρ = 0.6385, p = 0.0006) and Blautia caecimuris (ρ = 0.5269, p = 0.0068) were significantly correlated with propionic acid composition. Like humans, obese cats experienced an altered microbial community structure and function, favoring propionic acid production, during diet-induced weight loss.
Collapse
Affiliation(s)
- J C Rowe
- The Ohio State University College of Veterinary Medicine
| | - J A Winston
- The Ohio State University College of Veterinary Medicine
| | - V J Parker
- The Ohio State University College of Veterinary Medicine
| | - K E McCool
- North Carolina State University College of Veterinary Medicine
| | | | - R Lopes
- Texas A&M University College of Veterinary Medicine
| | - J M Steiner
- Texas A&M University College of Veterinary Medicine
| | - C Gilor
- University of Florida College of Veterinary Medicine
| | - A J Rudinsky
- The Ohio State University College of Veterinary Medicine
| |
Collapse
|
6
|
Ehrlich M, Madden C, McBride DS, Nolting JM, Huey D, Kenney S, Wang Q, Saif LJ, Vlasova A, Dennis P, Lombardi D, Gibson S, McLaine A, Lauterbach S, Yaxley P, Winston JA, Diaz-Campos D, Pesapane R, Flint M, Flint J, Junge R, Faith SA, Bowman AS, Hale VL. Lack of SARS-CoV-2 Viral RNA Detection among a Convenience Sampling of Ohio Wildlife, Companion, and Agricultural Animals, 2020-2021. Animals (Basel) 2023; 13:2554. [PMID: 37627345 PMCID: PMC10451347 DOI: 10.3390/ani13162554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 07/20/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in humans in late 2019 and spread rapidly, becoming a global pandemic. A zoonotic spillover event from animal to human was identified as the presumed origin. Subsequently, reports began emerging regarding spillback events resulting in SARS-CoV-2 infections in multiple animal species. These events highlighted critical links between animal and human health while also raising concerns about the development of new reservoir hosts and potential viral mutations that could alter the virulence and transmission or evade immune responses. Characterizing susceptibility, prevalence, and transmission between animal species became a priority to help protect animal and human health. In this study, we coalesced a large team of investigators and community partners to surveil for SARS-CoV-2 in domestic and free-ranging animals around Ohio between May 2020 and August 2021. We focused on species with known or predicted susceptibility to SARS-CoV-2 infection, highly congregated or medically compromised animals (e.g., shelters, barns, veterinary hospitals), and animals that had frequent contact with humans (e.g., pets, agricultural animals, zoo animals, or animals in wildlife hospitals). This included free-ranging deer (n = 76 individuals), free-ranging mink (n = 57), multiple species of bats (n = 59), and other wildlife in addition to domestic cats (n = 275) and pigs (n = 184). In total, we tested 792 individual animals (34 species) via rRT-PCR for SARS-CoV-2 RNA. SARS-CoV-2 viral RNA was not detected in any of the tested animals despite a major peak in human SARS-CoV-2 cases that occurred in Ohio subsequent to the peak of animal samplings. Importantly, we did not test for SARS-CoV-2 antibodies in this study, which limited our ability to assess exposure. While the results of this study were negative, the surveillance effort was critical and remains key to understanding, predicting, and preventing the re-emergence of SARS-CoV-2 in humans or animals.
Collapse
Affiliation(s)
- Margot Ehrlich
- College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Christopher Madden
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
| | - Dillon S. McBride
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
| | - Jacqueline M. Nolting
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
| | - Devra Huey
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
| | - Scott Kenney
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
- Center for Food Animal Health, Ohio Agricultural Research and Development Center, College of Food, Agricultural and Environmental Sciences, The Ohio State University, Wooster, OH 44691, USA
| | - Qiuhong Wang
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
- Center for Food Animal Health, Ohio Agricultural Research and Development Center, College of Food, Agricultural and Environmental Sciences, The Ohio State University, Wooster, OH 44691, USA
| | - Linda J. Saif
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
- Center for Food Animal Health, Ohio Agricultural Research and Development Center, College of Food, Agricultural and Environmental Sciences, The Ohio State University, Wooster, OH 44691, USA
| | - Anastasia Vlasova
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
- Center for Food Animal Health, Ohio Agricultural Research and Development Center, College of Food, Agricultural and Environmental Sciences, The Ohio State University, Wooster, OH 44691, USA
| | - Patricia Dennis
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
- Cleveland Metroparks Zoo, Cleveland, OH 44109, USA
- Cleveland Metroparks, Cleveland, OH 44144, USA
| | | | | | - Alexis McLaine
- Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Sarah Lauterbach
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
| | - Page Yaxley
- Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Jenessa A. Winston
- Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
- Center of Microbiome Science, The Ohio State University, Columbus, OH 43210, USA
| | - Dubraska Diaz-Campos
- Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Risa Pesapane
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
- School of Environment and Natural Resources, College of Food, Agricultural and Environmental Sciences, The Ohio State University, Columbus, OH 43210, USA
| | - Mark Flint
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
| | - Jaylene Flint
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
| | - Randy Junge
- Columbus Zoo & Aquarium, Powell, OH 43065, USA
| | - Seth A. Faith
- Center of Microbiome Science, The Ohio State University, Columbus, OH 43210, USA
- Infectious Diseases Institute, The Ohio State University, Columbus, OH 43210, USA
| | - Andrew S. Bowman
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
| | - Vanessa L. Hale
- Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA (A.V.)
- Center of Microbiome Science, The Ohio State University, Columbus, OH 43210, USA
- Infectious Diseases Institute, The Ohio State University, Columbus, OH 43210, USA
| |
Collapse
|
7
|
Brodlie H, Quimby J, Rudinsky AJ, Paschall RE, Brusach K, Klein H, Winston JA, Parker VJ. Measuring 25-hydroxyvitamin D in cats: comparison of a whole-blood lateral flow assay, 2 dried-blood-spot tests, and serum LC-MS/MS. J Vet Diagn Invest 2023; 35:246-251. [PMID: 36896661 PMCID: PMC10185994 DOI: 10.1177/10406387231158106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023] Open
Abstract
Measuring 25-hydroxyvitamin D (25D) can be a challenge in veterinary medicine because of laboratory accessibility and required sample volume. We compared 2 dried-blood-spot (DBS) tests and a lateral flow assay (LFA) to the gold standard, liquid chromatography-tandem mass spectrometry (LC-MS/MS). We hypothesized that there would be good agreement among the tests, within a clinically significant limit of agreement of ± 25 nmol/L. We collected blood from 6 healthy purpose-bred 2-y-old cats at 6 times over 6 wk, and measured 25D concentrations with all 4 tests. Agreement of the 3 candidate tests and LC-MS/MS was evaluated via Bland-Altman analysis, Passing-Bablok regression, and Lin correlation coefficients. Bland-Altman analysis demonstrated that the mean bias was >± 25 nmol/L for all 3 candidate tests in comparison to serum LC-MS/MS concentrations. The 95% CIs for the mean bias did not include zero, further supporting the presence of significant bias among methods. Additionally, all 3 tests had poor agreement with serum LC-MS/MS concentrations when analyzed by Lin correlation coefficient analysis, and bias between methods was further characterized by Passing-Bablok analysis. Based on these results, none of these 3 tests is recommended as an alternative to LC-MS/MS testing for 25D measurement in cats.
Collapse
Affiliation(s)
- Hannah Brodlie
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Comparative Hepatobiliary and Intestinal Research Program (CHIRP), College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Jessica Quimby
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Adam J. Rudinsky
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Comparative Hepatobiliary and Intestinal Research Program (CHIRP), College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Rene E. Paschall
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Katelyn Brusach
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Hannah Klein
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Comparative Hepatobiliary and Intestinal Research Program (CHIRP), College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Jenessa A. Winston
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Comparative Hepatobiliary and Intestinal Research Program (CHIRP), College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Valerie J. Parker
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Comparative Hepatobiliary and Intestinal Research Program (CHIRP), College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| |
Collapse
|
8
|
Nealon NJ, Wood A, Rudinsky AJ, Klein H, Salerno M, Parker VJ, Quimby JM, Howard J, Winston JA. Fecal identification markers impact the feline fecal microbiota. Front Vet Sci 2023; 10:1039931. [PMID: 36846255 PMCID: PMC9946173 DOI: 10.3389/fvets.2023.1039931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 01/02/2023] [Indexed: 02/11/2023] Open
Abstract
Fecal diagnostics are a mainstay of feline medicine, and fecal identification markers help to distinguish individuals in a multi-cat environment. However, the impact of identification markers on the fecal microbiota are unknown. Given the increased interest in using microbiota endpoints to inform diagnosis and treatment, the objective of this study was to examine the effects of orally supplemented glitter and crayon shavings on the feline fecal microbiota (amplicon sequencing of 16S rRNA gene V4 region). Fecal samples were collected daily from six adult cats that were randomized to receive oral supplementation with either glitter or crayon for two weeks, with a two-week washout before receiving the second marker. No adverse effects in response to marker supplementation were seen for any cat, and both markers were readily identifiable in the feces. Microbiota analysis revealed idiosyncratic responses to fecal markers, where changes in community structure in response to glitter or crayon could not be readily discerned. Given these findings, it is not recommended to administered glitter or crayon shavings as a fecal marker when microbiome endpoints are used, however their clinical use with other diagnostics should still be considered.
Collapse
Affiliation(s)
- Nora Jean Nealon
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Comparative Hepatobiliary and Intestinal Research Program, The Ohio State University, Columbus, OH, United States,Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States
| | - Alexandra Wood
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Comparative Hepatobiliary and Intestinal Research Program, The Ohio State University, Columbus, OH, United States
| | - Adam J. Rudinsky
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Comparative Hepatobiliary and Intestinal Research Program, The Ohio State University, Columbus, OH, United States,Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States
| | - Hannah Klein
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Comparative Hepatobiliary and Intestinal Research Program, The Ohio State University, Columbus, OH, United States,Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States
| | - Matthew Salerno
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Comparative Hepatobiliary and Intestinal Research Program, The Ohio State University, Columbus, OH, United States,Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States
| | - Valerie J. Parker
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Comparative Hepatobiliary and Intestinal Research Program, The Ohio State University, Columbus, OH, United States,Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States
| | - Jessica M. Quimby
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States
| | - James Howard
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Comparative Hepatobiliary and Intestinal Research Program, The Ohio State University, Columbus, OH, United States,Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States
| | - Jenessa A. Winston
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Comparative Hepatobiliary and Intestinal Research Program, The Ohio State University, Columbus, OH, United States,Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States,*Correspondence: Jenessa A. Winston ✉
| |
Collapse
|
9
|
Sahoo DK, Allenspach K, Mochel JP, Parker V, Rudinsky AJ, Winston JA, Bourgois-Mochel A, Ackermann M, Heilmann RM, Köller G, Yuan L, Stewart T, Morgan S, Scheunemann KR, Iennarella-Servantez CA, Gabriel V, Zdyrski C, Pilla R, Suchodolski JS, Jergens AE. Synbiotic-IgY Therapy Modulates the Mucosal Microbiome and Inflammatory Indices in Dogs with Chronic Inflammatory Enteropathy: A Randomized, Double-Blind, Placebo-Controlled Study. Vet Sci 2022; 10:vetsci10010025. [PMID: 36669027 PMCID: PMC9867299 DOI: 10.3390/vetsci10010025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/26/2022] [Accepted: 12/27/2022] [Indexed: 01/04/2023] Open
Abstract
Chronic inflammatory enteropathy (CE) is a common cause of persistent gastrointestinal signs and intestinal inflammation in dogs. Since evidence links dysbiosis to mucosal inflammation, probiotics, prebiotics, or their combination (synbiotics) may reduce intestinal inflammation and ameliorate dysbiosis in affected dogs. This study's aim was to investigate the effects of the synbiotic-IgY supplement on clinical signs, inflammatory indices, and mucosal microbiota in dogs with CE. Dogs with CE were enrolled in a randomized prospective trial. Twenty-four client-owned dogs were fed a hydrolyzed diet and administered supplement or placebo (diet) for 6 weeks. Dogs were evaluated at diagnosis and 2- and 6-week post-treatment. Outcome measures included clinical activity, endoscopic and histologic scores, inflammatory markers (fecal calprotectin, C-reactive protein), and composition of the mucosal microbiota via FISH. Eleven supplement- and nine placebo-treated dogs completed the trial. After 6 weeks of therapy, clinical activity and endoscopic scores decreased in both groups. Compared to placebo-treated dogs, dogs administered supplement showed decreased calprotectin at 2-week post-treatment, decreased CRP at 2- and 6-week post-treatment increased mucosal Clostridia and Bacteroides and decreased Enterobacteriaceae in colonic biopsies at trial completion. Results suggest a beneficial effect of diet and supplements on host responses and mucosal microbiota in dogs with CE.
Collapse
Affiliation(s)
- Dipak Kumar Sahoo
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
- Correspondence: or (D.K.S.); (A.E.J.)
| | - Karin Allenspach
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
| | - Jonathan P. Mochel
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
| | - Valerie Parker
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Adam Joseph Rudinsky
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Jenessa A. Winston
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Agnes Bourgois-Mochel
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
| | - Mark Ackermann
- National Animal Disease Center USDA, ARS, Ames, IA 50010, USA
| | - Romy M. Heilmann
- Department for Small Animals, Veterinary Teaching Hospital, College of Veterinary Medicine, University of Leipzig, DE-04103 Leipzig, SN, Germany
| | - Gabor Köller
- Department for Large Animals, University of Leipzig, DE-04103 Leipzig, SN, Germany
| | - Lingnan Yuan
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
| | - Tracey Stewart
- Roy J. Carver High Resolution Microscopy Facility, Iowa State University, Ames, IA 50011, USA
| | - Shannon Morgan
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
| | - Kaitlyn R Scheunemann
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
| | | | - Vojtech Gabriel
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
| | - Christopher Zdyrski
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
| | - Rachel Pilla
- Gastrointestinal Laboratory, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
| | - Albert E. Jergens
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
- Correspondence: or (D.K.S.); (A.E.J.)
| |
Collapse
|
10
|
Moreno AA, Parker VJ, Winston JA, Rudinsky AJ. Dietary fiber aids in the management of canine and feline gastrointestinal disease. J Am Vet Med Assoc 2022; 260:S33-S45. [DOI: 10.2460/javma.22.08.0351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Dietary fiber describes a diverse assortment of nondigestible carbohydrates that play a vital role in the health of animals and maintenance of gastrointestinal tract homeostasis. The main roles dietary fiber play in the gastrointestinal tract include physically altering the digesta, modulating appetite and satiety, regulating digestion, and acting as a microbial energy source through fermentation. These functions can have widespread systemic effects. Fiber is a vital component of nearly all commercial canine and feline diets. Key features of fiber types, such as fermentability, solubility, and viscosity, have been shown to have clinical implications as well as health benefits in dogs and cats. Practitioners should know how to evaluate a diet for fiber content and the current knowledge on fiber supplementation as it relates to common enteropathies including acute diarrhea, chronic diarrhea, constipation, and hairball management. Understanding the fundamentals of dietary fiber allows the practicing clinician to use fiber optimally as a management modality.
Collapse
Affiliation(s)
- Adam A. Moreno
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- The Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Valerie J. Parker
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- The Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Jenessa A. Winston
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- The Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Adam J. Rudinsky
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- The Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| |
Collapse
|
11
|
Kratzer GR, Shepherd M, Delaney SJ, Winston JA, Rudinsky AJ, Parker VJ. Home-cooked diets cost more than commercially prepared dry kibble diets for dogs with chronic enteropathies. J Am Vet Med Assoc 2022; 260:S53-S60. [PMID: 36136931 DOI: 10.2460/javma.22.07.0284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Nutrition plays a fundamental role in the management of canine chronic enteropathies (CCEs). Dog owners may elect to feed home-cooked diets (HCDs) rather than veterinary commercially prepared diets (CPDs) because of perceived lower costs. There is a paucity of data comparing costs of these options. We hypothesize there will be differences in costs between complete and balanced HCDs and nutritionally comparable CPDs. SAMPLE 6 Home-cooked diets. PROCEDURES Six HCD recipes (2 highly digestible, 2 limited antigen, 2 low-fat) were formulated by 2 board-certified veterinary nutritionists to mimic the nutritional and ingredient profiles of veterinary CPDs for management of CCEs. The cost (in US$ on a per 100 kilocalorie [kcal] basis) of each recipe was determined via collection of ingredient prices from 3 grocery stores combined with supplement prices from online retailers. Prices of CPDs were obtained from a national online retailer. Maintenance energy requirements of 1.6 X (70 X BWkg0.75), where BWkg represents body weight in kilograms, were calculated for 3 dog sizes (5, 20, and 40 kg), and costs of feeding maintenance energy requirements with HCDs versus dry and canned CPDs were compared with a Kruskal-Wallis test and post hoc testing. RESULTS The median costs of all dry and canned CPDs and HCDs were $0.29 (range, $0.18 to $0.46), $1.01 (range, $0.77 to $1.20), and $0.55 (range, $0.35 to $1.14), respectively. Feeding complete and balanced HCDs cost more than feeding dry CPDs (P < .001), but not canned CPDs (P > .99). CLINICAL RELEVANCE Dry CPDs cost the least for nutritional management of CCEs. There is a wide range of costs for both CPDs and HCDs.
Collapse
Affiliation(s)
- Gabriella R Kratzer
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | | | - Sean J Delaney
- Balance It, A DBA of Davis Veterinary Medical Consulting, Inc, Davis, CA
| | - Jenessa A Winston
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Adam J Rudinsky
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Valerie J Parker
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| |
Collapse
|
12
|
Snell CB, Winston JA, Quimby JM, Diaz-Campos D, Gibson JF, Harrison A, Byron JM, Justice SS, Rudinsky AJ. Escherichia coli probiotic exhibits in vitro growth-limiting effects on clinical feline uropathogenic E coli isolates. Am J Vet Res 2022; 83:ajvr.21.07.0096. [DOI: 10.2460/ajvr.21.07.0096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
OBJECTIVE
To characterize uropathogenic Escherichia coli (UPEC) in cases of clinical feline urinary tract infection (UTI) and subclinical bacteriuria and investigate the in vitro effects of E coli strain Nissle 1917 on isolate growth.
ANIMALS
40 cats with positive E coli culture results for urine collected during routine evaluation.
PROCEDURES
Characterization of UPEC isolates was performed by PCR-based phylotype analysis and serotyping. Nissle 1917 effects on growth inhibition and competitive overgrowth against UPEC isolates were evaluated in vitro using a plate-based competition assay.
RESULTS
Feline phylogroups were similar to previous human and feline UPEC studies, with most of the isolates belonging to phylogroup A (42.5%), B2 (37.5%), and D (15.0%). Fifty-two percent of isolates were found to be resistant to antimicrobials, with 19% of these being multidrug resistant (MDR). Nissle 1917 adversely affected the growth of 82.5% of all isolates and 100% of MDR isolates in vitro. The median zone of inhibition was 3.33 mm (range, 1.67 to 10.67 mm). Thirteen isolates were affected via competitive overgrowth and 20 via growth inhibition.
CLINICAL RELEVANCE
UPEC isolates from cats were similar in phylogroup analysis to human and dog isolates. The in vitro effects of Nissle 1917 on UPEC warrant additional studies to determine if similar results can be duplicated in vivo.
Collapse
Affiliation(s)
- Chloe B. Snell
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Jenessa A. Winston
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Jessica M. Quimby
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Dubraska Diaz-Campos
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Jordan F. Gibson
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Alistair Harrison
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH
| | - Julie M. Byron
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Sheryl S. Justice
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH
| | - Adam J. Rudinsky
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH
| |
Collapse
|
13
|
Gibson JF, Parker VJ, Howard JP, Snell CM, Cross EW, Pagliughi LB, Diaz-Campos D, Winston JA, Rudinsky AJ. Escherichia coli pathotype contamination in raw canine diets. Am J Vet Res 2022; 83:ajvr.21.10.0166. [PMID: 35524954 DOI: 10.2460/ajvr.21.10.0166] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate the prevalence of Escherichia coli contamination and E coli virulence gene signatures consistent with known E coli pathotypes in commercially available conventional diets and raw-meat-based diets (RMBDs). SAMPLE 40 diets in total (19 conventionally cooked kibble or canned diets and 21 RMBDs) obtained from retail stores or online distributors. PROCEDURES Each diet was cultured for E coli contamination in 3 separate container locations using standard microbiological techniques. Further characterization of E coli isolates was performed by polymerase chain reaction-based pathotype and virulence gene analysis. RESULTS Conventional diets were negative in all culture based testing. In RMBDs, bacterial contamination was similar to previous reports in the veterinary literature, with 66% (14/21) of the RMBDs having positive cultures for E coli. Among the 191 confirmed E coli isolates from these diets, 31.9% (61/191) were positive for virulence genes. Categorized by pathotype, isolates presumptively belonging to the neonatal meningitis E coli pathotype (15.7% [30/191]) were the most common, followed by enterohemorrhagic E coli (10.5% [20/191]), enteropathogenic E coli (5.8% [11/191]), uropathogenic E coli (2.1% [4/191]), and diffusely adherent E coli (1.6% [3/191]). CLINICAL RELEVANCE The results of this study reaffirmed the bacteriologic risks previously associated with RMBDs. Furthermore, potential zoonotic concerns associated with identified pathotypes in these diets may have significant consequences for owners in the animals' home environment. Potential risk associated with bacterial contamination should be addressed in animals fed RMBDs.
Collapse
Affiliation(s)
- Jordan F Gibson
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,The Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Valerie J Parker
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,The Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - James P Howard
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,The Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Chloe M Snell
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,The Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Emily W Cross
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Lauren B Pagliughi
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Dubraska Diaz-Campos
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Jenessa A Winston
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,The Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Adam J Rudinsky
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,The Comparative Hepatobiliary and Intestinal Research Program, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| |
Collapse
|
14
|
Winston JA, Rivera A, Cai J, Patterson AD, Theriot CM. Secondary bile acid ursodeoxycholic acid alters weight, the gut microbiota, and the bile acid pool in conventional mice. PLoS One 2021; 16:e0246161. [PMID: 33600468 PMCID: PMC7891722 DOI: 10.1371/journal.pone.0246161] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 01/15/2021] [Indexed: 12/15/2022] Open
Abstract
Ursodeoxycholic acid (commercially available as ursodiol) is a naturally occurring bile acid that is used to treat a variety of hepatic and gastrointestinal diseases. Ursodiol can modulate bile acid pools, which have the potential to alter the gut microbiota community structure. In turn, the gut microbial community can modulate bile acid pools, thus highlighting the interconnectedness of the gut microbiota-bile acid-host axis. Despite these interactions, it remains unclear if and how exogenously administered ursodiol shapes the gut microbial community structure and bile acid pool in conventional mice. This study aims to characterize how ursodiol alters the gastrointestinal ecosystem in conventional mice. C57BL/6J wildtype mice were given one of three doses of ursodiol (50, 150, or 450 mg/kg/day) by oral gavage for 21 days. Alterations in the gut microbiota and bile acids were examined including stool, ileal, and cecal content. Bile acids were also measured in serum. Significant weight loss was seen in mice treated with the low and high dose of ursodiol. Alterations in the microbial community structure and bile acid pool were seen in ileal and cecal content compared to pretreatment, and longitudinally in feces following the 21-day ursodiol treatment. In both ileal and cecal content, members of the Lachnospiraceae Family significantly contributed to the changes observed. This study is the first to provide a comprehensive view of how exogenously administered ursodiol shapes the healthy gastrointestinal ecosystem in conventional mice. Further studies to investigate how these changes in turn modify the host physiologic response are important.
Collapse
Affiliation(s)
- Jenessa A. Winston
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States of America
| | - Alissa Rivera
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States of America
| | - Jingwei Cai
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States of America
| | - Andrew D. Patterson
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States of America
| | - Casey M. Theriot
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States of America
| |
Collapse
|
15
|
Cavett CL, Tonero M, Marks SL, Winston JA, Gilor C, Rudinsky AJ. Consistency of faecal scoring using two canine faecal scoring systems. J Small Anim Pract 2021; 62:167-173. [PMID: 33491796 DOI: 10.1111/jsap.13283] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 10/28/2020] [Accepted: 11/26/2020] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To determine the agreement of canine faecal scoring between individuals with different levels of experience using two available faecal scoring systems. MATERIALS AND METHODS Naturally-voided, undisturbed bowel movements from 126 dogs were evaluated by veterinarians (n = 3) and members of the lay public (n = 126) within 15 minutes of defecation. Each participant was provided a copy of the Purina and Waltham faecal scoring charts in order to characterise the faeces. Agreement between veterinarians and lay people was assessed with kappa statistics, Bland-Altman analysis and visualised with Bland-Altman plots. RESULTS Variable levels of consistency were observed in assessing faecal form among individuals with varying degrees of experience. Fair to substantial agreement existed between individual veterinarians scoring the same bowel movement (kappa statistic ranging from 0.40 to 0.77 on the Purina Scale and 0.54 to 0.61 on the Waltham Scale), while the agreement scores between the veterinarian and the lay public was fair (kappa statistic of 0.38 on the Purina Scale and 0.34 on the Waltham Scale). Disagreement in faecal scores occurred more frequently with lay people versus veterinarians. CLINICAL SIGNIFICANCE The consistency of faecal scoring improved based on the level of experience with the highest agreement consistently noted between veterinarians. In all comparisons, there was inconsistency in faecal scoring which might have implications for veterinarians managing diarrhoeic canine patients. Further studies are needed to better investigate how faecal scoring can be optimised for use in clinical and research settings.
Collapse
Affiliation(s)
- C L Cavett
- Department of Veterinary Clinical Medicine (Cavett, Tonero), College of Veterinary Medicine, University of Illinois, Urbana, Illinois, 61820, USA
| | - M Tonero
- Department of Veterinary Clinical Medicine (Cavett, Tonero), College of Veterinary Medicine, University of Illinois, Urbana, Illinois, 61820, USA
| | - S L Marks
- Department of Veterinary Medicine and Epidemiology (Marks), School of Veterinary Medicine, University of California, Davis, Davis, California, 95616, USA
| | - J A Winston
- Department of Veterinary Clinical Sciences (Winston, Rudinsky), College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA.,Comparative Hepatobiliary and Intestinal Research Program (CHIRP) (Winston, Rudinsky), College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA
| | - C Gilor
- Department of Small Animal Clinical Sciences (Gilor), College of Veterinary Medicine, University of Florida, Gainesville, Florida, 32608, USA
| | - A J Rudinsky
- Department of Veterinary Clinical Sciences (Winston, Rudinsky), College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA.,Comparative Hepatobiliary and Intestinal Research Program (CHIRP) (Winston, Rudinsky), College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA
| |
Collapse
|
16
|
Thanissery R, McLaren MR, Rivera A, Reed AD, Betrapally NS, Burdette T, Winston JA, Jacob M, Callahan BJ, Theriot CM. Clostridioides difficile carriage in animals and the associated changes in the host fecal microbiota. Anaerobe 2020; 66:102279. [PMID: 33022384 PMCID: PMC10760528 DOI: 10.1016/j.anaerobe.2020.102279] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 08/31/2020] [Accepted: 09/27/2020] [Indexed: 02/08/2023]
Abstract
The relationship between the gut microbiota and Clostridioides difficile, and its role in the severity of C. difficile infection in humans is an area of active research. Intestinal carriage of toxigenic and non-toxigenic C. difficile strains, with and without clinical signs, is reported in animals, however few studies have looked at the risk factors associated with C. difficile carriage and the role of the host gut microbiota. Here, we isolated and characterized C. difficile strains from different animal species (predominantly canines (dogs), felines (cats), and equines (horses)) that were brought in for tertiary care at North Carolina State University Veterinary Hospital. C. difficile strains were characterized by toxin gene profiling, fluorescent PCR ribotyping, and antimicrobial susceptibility testing. 16S rRNA gene sequencing was done on animal feces to investigate the relationship between the presence of C. difficile and the gut microbiota in different hosts. Here, we show that C. difficile was recovered from 20.9% of samples (42/201), which included 33 canines, 2 felines, and 7 equines. Over 69% (29/42) of the isolates were toxigenic and belonged to 14 different ribotypes including ones known to cause CDI in humans. The presence of C. difficile results in a shift in the fecal microbial community structure in both canines and equines. Commensal Clostridium hiranonis was negatively associated with C. difficile in canines. Further experimentation showed a clear antagonistic relationship between the two strains in vitro, suggesting that commensal Clostridia might play a role in colonization resistance against C. difficile in different hosts.
Collapse
Affiliation(s)
- R Thanissery
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA
| | - M R McLaren
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA
| | - A Rivera
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA
| | - A D Reed
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA
| | - N S Betrapally
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA
| | - T Burdette
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA
| | - J A Winston
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA
| | - M Jacob
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA
| | - B J Callahan
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA
| | - C M Theriot
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA.
| |
Collapse
|
17
|
Abstract
Bile acid biotransformation is a collaborative effort by the host and the gut microbiome. Host hepatocytes synthesize primary bile acids from cholesterol. Once these host-derived primary bile acids enter the gastrointestinal tract, the gut microbiota chemically modify them into secondary bile acids. Interest into the gut-bile acid-host axis is expanding in diverse fields including gastroenterology, endocrinology, oncology, and infectious disease. This review aims to 1) describe the physiologic aspects of collaborative bile acid metabolism by the host and gut microbiota; 2) to evaluate how gut microbes influence bile acid pools, and in turn how bile acid pools modulate the gut microbial community structure; 3) to compare species differences in bile acid pools; and lastly, 4) discuss the effects of ursodeoxycholic acid (UDCA) administration, a common therapeutic bile acid, on the gut microbiota-bile acid-host axis.
Collapse
Affiliation(s)
- Jenessa A. Winston
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Casey M. Theriot
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA,CONTACT Casey M. Theriot Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Research Building 406, 1060 William Moore Drive, Raleigh, NC 27607, USA
| |
Collapse
|
18
|
Thanissery R, Winston JA, Theriot CM. Inhibition of spore germination, growth, and toxin activity of clinically relevant C. difficile strains by gut microbiota derived secondary bile acids. Anaerobe 2017; 45:86-100. [PMID: 28279860 PMCID: PMC5466893 DOI: 10.1016/j.anaerobe.2017.03.004] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 03/02/2017] [Accepted: 03/04/2017] [Indexed: 12/18/2022]
Abstract
The changing epidemiology of Clostridium difficile infection over the past decades presents a significant challenge in the management of C. difficile associated diseases. The gastrointestinal tract microbiota provides colonization resistance against C. difficile, and growing evidence suggests that gut microbial derived secondary bile acids (SBAs) play a role. We hypothesized that the C. difficile life cycle; spore germination and outgrowth, growth, and toxin production, of strains that vary by age and ribotype will differ in their sensitivity to SBAs. C. difficile strains R20291 and CD196 (ribotype 027), M68 and CF5 (017), 630 (012), BI9 (001) and M120 (078) were used to define taurocholate (TCA) mediated spore germination and outgrowth, growth, and toxin activity in the absence and presence of gut microbial derived SBAs (deoxycholate, isodeoxycholate, lithocholate, isolithocholate, ursodeoxycholate, ω-muricholate, and hyodeoxycholate) found in the human and mouse large intestine. C. difficile strains varied in their rates of germination, growth kinetics, and toxin activity without the addition of SBAs. C. difficile M120, a highly divergent strain, had robust germination, growth, but significantly lower toxin activity compared to other strains. Many SBAs were able to inhibit TCA mediated spore germination and outgrowth, growth, and toxin activity in a dose dependent manner, but the level of inhibition and resistance varied across all strains and ribotypes. This study illustrates how clinically relevant C. difficile strains can have different responses when exposed to SBAs present in the gastrointestinal tract.
Collapse
Affiliation(s)
- Rajani Thanissery
- Department of Population Health and Pathobiology, College of Veterinary Medicine, Research Building 424, North Carolina State University, 1060 William Moore Drive, Raleigh, NC 27607, United States.
| | - Jenessa A Winston
- Department of Population Health and Pathobiology, College of Veterinary Medicine, Research Building 424, North Carolina State University, 1060 William Moore Drive, Raleigh, NC 27607, United States.
| | - Casey M Theriot
- Department of Population Health and Pathobiology, College of Veterinary Medicine, Research Building 424, North Carolina State University, 1060 William Moore Drive, Raleigh, NC 27607, United States.
| |
Collapse
|
19
|
Winston JA, Thanissery R, Montgomery SA, Theriot CM. Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291. J Vis Exp 2016. [PMID: 28060346 DOI: 10.3791/54850] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Clostridium difficile is an anaerobic, gram-positive, spore-forming enteric pathogen that is associated with increasing morbidity and mortality and consequently poses an urgent threat to public health. Recurrence of a C. difficile infection (CDI) after successful treatment with antibiotics is high, occurring in 20-30% of patients, thus necessitating the discovery of novel therapeutics against this pathogen. Current animal models of CDI result in high mortality rates and thus do not approximate the chronic, insidious disease manifestations seen in humans with CDI. To evaluate therapeutics against C. difficile, a mouse model approximating human disease utilizing a clinically-relevant strain is needed. This protocol outlines the cefoperazone mouse model of CDI using a clinically-relevant and genetically-tractable strain, R20291. Techniques for clinical disease monitoring, C. difficile bacterial enumeration, toxin cytotoxicity, and histopathological changes throughout CDI in a mouse model are detailed in the protocol. Compared to other mouse models of CDI, this model is not uniformly lethal at the dose administered, allowing for the observation of a prolonged clinical course of infection concordant with the human disease. Therefore, this cefoperazone mouse model of CDI proves a valuable experimental platform to assess the effects of novel therapeutics on the amelioration of clinical disease and on the restoration of colonization resistance against C. difficile.
Collapse
Affiliation(s)
- Jenessa A Winston
- Department of Population Health and Pathobiology, North Carolina State University College of Veterinary Medicine
| | - Rajani Thanissery
- Department of Population Health and Pathobiology, North Carolina State University College of Veterinary Medicine
| | - Stephanie A Montgomery
- Department of Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine
| | - Casey M Theriot
- Department of Population Health and Pathobiology, North Carolina State University College of Veterinary Medicine;
| |
Collapse
|
20
|
Abstract
Glioblastoma multiforme is a highly invasive tumor bearing a dismal prognosis. Experimental strategies that focus on the specific biological cues governing the invasive capacity of these tumors may hold significant therapeutic promise. In this context, we describe the in vitro and in vivo association of the cell surface chemokine receptor, CXCR4, with the development of an invasive phenotype in malignant glioblastoma. We demonstrate that invasive populations of glioma cells overexpress CXCR4 at the message and protein levels, and that this expression ranges from 25- to 89-fold higher than that found in noninvasive tumor cells. Furthermore, neutralization of CXCR4 significantly impairs the in vitro invasive capacity of malignant glial cells. In addition, glioma cells secrete CXCL12 and demonstrate robust invasive capacity toward a CXCL12 gradient in vitro. These findings underscore the importance of CXCR4 as a potential therapeutic target for the treatment of invasive glioblastoma.
Collapse
Affiliation(s)
- M Ehtesham
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN 37232-2380, USA.
| | | | | | | |
Collapse
|
21
|
Winston JA, Bruggeman LA, Ross MD, Jacobson J, Ross L, D'Agati VD, Klotman PE, Klotman ME. Nephropathy and establishment of a renal reservoir of HIV type 1 during primary infection. N Engl J Med 2001; 344:1979-84. [PMID: 11430327 DOI: 10.1056/nejm200106283442604] [Citation(s) in RCA: 209] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- J A Winston
- Division of Nephrology, Mt Sinai School of Medicine, New York, NY 10029, USA
| | | | | | | | | | | | | | | |
Collapse
|
22
|
Abstract
Human immunodeficiency virus type 1 (HIV-1)-seropositive patients are at risk for the development of a variety of acute and chronic renal diseases. The most common cause of chronic renal failure in HIV-1-seropositive patients is HIV-associated nephropathy (HIVAN). HIVAN occurs almost exclusively in black patients and the majority of published cases are of patients who present with acquired immunodeficiency syndrome (AIDS). This disease is currently the third leading cause of end-stage renal disease in blacks aged 20-64. Because HIV-1-seropositive patients may develop a wide variety of acute and chronic renal diseases, definitive diagnosis requires renal biopsy. Emerging data suggest a direct role of HIV-1 infection of kidney cells in the pathogenesis of HIVAN. There have been no well-controlled clinical trials in the treatment of HIVAN. The therapeutic agents with the most promise are angiotensin-converting enzyme inhibitors and antiretroviral medications. Long-term renal prognosis may be changing in the setting of improved aggressive antiretroviral therapy. Patient survival is determined primarily by the stage of HIV-1 infection. In this article, we present the case history of a patient who developed HIVAN. We then review the current literature concerning the epidemiology, differential diagnosis, etiology, and treatment of HIVAN.
Collapse
Affiliation(s)
- M J Ross
- Department of Medicine, Division of Nephrology, Mount Sinai School of Medicine, New York, New York 10029, USA.
| | | | | |
Collapse
|
23
|
Winston JA, Burns GC, Klotman PE. Treatment of HIV-associated nephropathy. Semin Nephrol 2000; 20:293-8. [PMID: 10855939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
HIV-Associated Nephropathy (HIVAN) is the most common cause of chronic renal disease in HIV-1 infected patients. The disease occurs predominantly in blacks between the ages of 20 and 64. In this population it is currently the third leading cause of end-stage renal disease. The majority of patients with HIVAN have an AIDS-defining condition when the kidney disease is diagnosed. Without treatment they progress to end-stage renal disease within weeks to months. Patients with HIVAN should be treated with highly active antiretroviral therapy (HAART). Treatment should prolong survival and may improve or stabilize kidney function. Steroids have short-term benefits but long-term benefits have not been shown. Converting enzyme inhibitors (CEI) seem to stabilize kidney function and appear to be most effective when administered early in the course of HIVAN. A randomized controlled trial comparing HAART therapy to HAART and CEI should be performed.
Collapse
Affiliation(s)
- J A Winston
- Department of Medicine, Mount Sinai School of Medicine, Saint Vincents Hospital Medical Center, New York, NY 10029, USA.
| | | | | |
Collapse
|
24
|
Abstract
BACKGROUND Human immunodeficiency virus-associated nephropathy (HIVAN) can be the initial presentation of HIV-1 infection. As a result, many have assumed that HIVAN can occur at any point in the infection. This issue has important implications for appropriate therapy and, perhaps, for pathogenesis. Since the development of new case definitions for acquired immunodeficiency syndrome (AIDS) and better tools to assess infection, the relationship of HIVAN to the time of AIDS infection has not been addressed. In this study, we reassessed the stage of infection at the time of HIVAN diagnosis in 10 patients, and we reviewed all previously published cases applying the new case definitions to assess stage of infection. METHODS HIVAN was confirmed by kidney biopsy in HIV seropositive patients with azotemia and/or proteinuria. CD4+ cell count and plasma HIV-1 RNA copy number were measured. We also reviewed all published cases of HIVAN to determine if AIDS-defining conditions, by current Centers for Disease Control definitions, were present in patients with biopsy-proven HIVAN. RESULTS Twenty HIV-1 seropositive patients with proteinuria and an elevated creatinine concentration were biopsied. HIVAN was the single most common cause of renal disease. CD4+ cell count was below 200/mm3 in all patients with HIVAN, fulfilling Centers for Disease Control criteria for an AIDS-defining condition. HIV-1 plasma RNA was detectable in all patients with HIVAN. In reviewing previous reports, an AIDS-defining condition was present in virtually all patients with HIVAN. CONCLUSION HIVAN develops late, not early, in the course of HIV-1 infection following the development of AIDS. This likely accounts for the poor prognosis noted in previous publications and has implications for pathogenesis. In addition, given the detectable viral RNA levels, highly active antiretroviral therapy is indicated in HIVAN. Highly active antiretroviral therapy may improve survival as well as alter the natural history of HIVAN.
Collapse
Affiliation(s)
- J A Winston
- Division of Nephrology, Department of Medicine, Mount Sinai School of Medicine, New York, New York 10029,
| | | | | |
Collapse
|
25
|
Winston JA. Race and health in America. Acad Med 1998; 73:1084-1085. [PMID: 9795627 DOI: 10.1097/00001888-199810000-00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
26
|
Winston JA, Burns GC, Klotman PE. The human immunodeficiency virus (HIV) epidemic and HIV-associated nephropathy. Semin Nephrol 1998; 18:373-7. [PMID: 9692350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Human immunodeficiency virus (HIV)-associated nephropathy (HIVAN), the single most common cause of end-stage renal failure in seropositive patients, has increased in incidence by 30% each year since 1991. Occurring almost exclusively in blacks, HIVAN became the third leading cause of ESRD in blacks, ages 20 to 64, in 1995. During that year, the absolute number of new acquired immune deficiency syndrome (AIDS) cases declined for the first time since the epidemic began. The decrease occurred predominantly in white males, whereas in blacks with heterosexual exposures for risk factors, the incidence actually increased. Also in 1995, the number of AIDS-related deaths declined for the first time. If these trends continue, we can expect a continued increase in the number of blacks living with AIDS. We estimate that 1% to 4% will develop renal failure from HIVAN. The incidence of HIVAN can be expected to increase unless new approaches are successful in preventing the spread of HIV-1 in all segments of the population or in treating the renal complications of HIV-1 infection.
Collapse
Affiliation(s)
- J A Winston
- Division of Nephrology, Mount Sinai School of Medicine, New York, NY 10029, USA
| | | | | |
Collapse
|
27
|
Abstract
We report a case of renal capsular artery pseudoaneurysm caused by percutaneous renal biopsy. The injury was diagnosed and treated with arteriography and transarterial embolization. Because the arterial injury was extraparenchymal, the clinical manifestations of blood loss were flank pain and decreasing hematocrit without hematuria. Injury to renal capsular arteries during percutaneous renal biopsy is a rare possibility because of their small size.
Collapse
Affiliation(s)
- J E Silberzweig
- Department of Radiology, The Mount Sinai Medical Center, New York, NY, USA
| | | | | | | |
Collapse
|
28
|
Abstract
HIV-associated nephropathy is infrequently cited as a common cause of ESRD. It is likely, however, that by the end of the decade, HIV-associated nephropathy will be the third leading cause of ESRD in African Americans between the ages of 20 and 64. Underreporting for reasons of confidentiality and a failure to track this specific diagnostic category nationally may account for the nephrology community's inattention. As a result of this community's failure to define this issue, national agencies are poorly prepared to recognize and anticipate the changing demographics of the AIDS epidemic as it affects the practice of nephrology. The study presented here concluded: that a national registry should be created to track the incidence of HIV-associated nephropathy as a cause of ESRD; that renal biopsies should be routinely performed to confirm the clinical diagnosis of HIV-associated nephropathy; that anonymous serological screening of all patients and health care providers in dialysis units be reconsidered in order to maintain vigilance for potential unit outbreaks; that the National Institutes of Health and the Office of AIDS Research be better appraised of the importance of this issue by the nephrology community; and that special attention be directed toward the underlying cause(s) of HIV-associated nephropathy and the cofactor(s) that determine the predilection of this disease in blacks.
Collapse
Affiliation(s)
- J A Winston
- Division of Nephrology, Mount Sinai Medical Center, New York, NY 10029, USA
| | | |
Collapse
|
29
|
Makita Z, Bucala R, Rayfield EJ, Friedman EA, Kaufman AM, Korbet SM, Barth RH, Winston JA, Fuh H, Manogue KR. Reactive glycosylation endproducts in diabetic uraemia and treatment of renal failure. Lancet 1994; 343:1519-22. [PMID: 7911868 DOI: 10.1016/s0140-6736(94)92935-1] [Citation(s) in RCA: 300] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
In diabetes and ageing, glucose-derived advanced glycosylation endproducts (AGEs) cross-link proteins and cause vascular tissue damage. Elimination of circulating low-molecular weight AGE-modified molecules (LMW-AGEs) by the kidney is impaired in diabetic patients with end-stage renal disease, a group subject to accelerated atherosclerosis. We determined the effectiveness of current renal replacement treatments on elimination of serum LMW-AGEs in diabetic and non-diabetic patients with end-stage renal disease. Although diabetic patients receiving high-flux haemodialysis achieved 33% lower steady-state serum LMW-AGE than did those in conventional haemodialysis (p < 0.005), LMW-AGE concentrations remained 3.5-6 fold above normal, whether high-flux dialysis, conventional haemodialysis, or chronic ambulatory peritoneal dialysis were used. High-flux haemodialysis markedly reduced AGE during each treatment session (47.9% in the diabetic, p < 0.001 and 60.6% in the non-diabetic group, p < 0.001) but concentrations returned to pre-treatment range within 3 hours. In contrast, normal LMW-AGE concentrations were maintained in patients with functioning renal transplants. We found that LMW-AGEs with an apparent molecular weight of 2000-6000 circulate and retain strong inherent chemical reactivity--when exposed to collagen in vitro, up to 77% attached covalently to form AGE-collagen, and the AGE-crosslink inhibitor aminoguanidine completely inhibited this reaction. The results suggest that LMW-AGEs comprise a set of chemically-reactive molecules that are refractory to removal by current dialysis treatments. Through covalent reattachment onto vascular matrix or serum components, LMW-AGEs may exacerbate vascular pathology associated with end-stage renal disease.
Collapse
Affiliation(s)
- Z Makita
- Picower Institute for Medical Research, Manhasset, NY 11030
| | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Abstract
Experiments were performed to determine the cause of the reduced glomerular filtration rate (GFR) in cyclosporine nephrotoxicity during compensatory renal growth. Sprague-Dawley rats were uninephrectomized and given daily injections of cyclosporine (30 mg/kg, i.m.) or vehicle (olive oil), and studied 7 or 14 days later. In cyclosporine treated rats GFR was lower seven days (1.34 +/- 0.10 vs. 1.68 +/- 0.07 ml/min) and 14 days (1.19 +/- 0.08 vs. 1.58 +/- 0.04, P less than 0.025) following uninephrectomy. Arterial blood pressure, cardiac output and renal blood flow (RBF) were not different in cyclosporine and control rats. Kidney mass increased to the same extent in cyclosporine and control rats. Micropuncture of the glomerular microcirculation in similarly prepared Munich-Wistar rats demonstrated low whole kidney GFR (1.10 +/- 0.07 vs. 1.55 +/- 0.13 ml/min, P less than 0.01), and single nephron GFR (31.07 +/- 2.27 vs. 42.36 +/- 2.47 nl/min, P less than 0.005) in cyclosporine treated rats as compared to controls. Single nephron plasma flow, afferent and efferent arteriolar resistance, the transglomerular hydrostatic pressure gradient, and arterial blood pressure were the same in both groups. The glomerular capillary ultrafiltration coefficient (Kf) was lower in cyclosporine treated rats compared to controls [0.039 +/- 0.002 vs. 0.075 +/- 0.013 nl/(sec.mm Hg), P less than 0.025]. We conclude that in this model of cyclosporine nephrotoxicity the low GFR is caused solely by a reduction in Kf, and that cyclosporine can reduce GFR without causing renal vasoconstriction.
Collapse
Affiliation(s)
- J A Winston
- Department of Medicine, Mount Sinai School of Medicine, New York, New York
| | | | | |
Collapse
|
31
|
Abstract
Studies were designed to determine the cause of the reduced glomerular filtration rate (GFR) in early cisplatin-induced acute renal failure. Rats were studied 72 h following a single intraperitoneal injection of cisplatin (5 mg/kg) or vehicle (0.9% NaCl). Whole kidney GFR and blood flow were lower in cisplatin-treated animals than in controls (0.30 +/- 0.06 vs. 1.17 +/- 0.06 ml X min-1 X g kidney wt-1 and 5.30 +/- 0.62 vs. 8.25 +/- 0.43 ml X min-1 X g kidney wt-1, respectively; P less than 0.001), as were superficial nephron GFR and stop-flow pressure (20.2 +/- 2.1 vs. 34.5 +/- 2.0 nl X min-1 X g kidney wt-1 and 29.0 +/- 1.9 vs. 39.8 +/- 1.3 mmHg, respectively; P less than 0.001). After volume expansion, renal plasma flow increased in control rats, whereas whole kidney and single nephron GFR did not change. In experimental animals, whole kidney filtration rate rose to 0.58 +/- 0.07 ml X min-1 X g kidney wt-1, single nephron filtration rate increased to 29.9 +/- 3.5 nl X min-1 X g kidney wt-1 (P less than 0.005), and renal plasma flow increased to 5.62 +/- 0.60 ml X min-1 X g kidney wt-1 (P less than 0.05). Intratubular hydrostatic pressure was not different in the two groups before or after volume expansion. The results of these studies show that the reduced GFR in early cisplatin-induced renal failure is due, in part, to reversible changes in renal blood flow and renal vascular resistance.
Collapse
|
32
|
Winston JA. Survival of a mutation under mixed positive assortative and random mating. I. One locus, two alleles without dominance. Biometrics 1970; 26:433-50. [PMID: 5480660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|