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An J, Choi H, Choi J, Lim H, Huh W, Oh Y, Park JS, Han J, Lim S, Lim C, Kim T, Moon J, Youn H. Effect of the sodium-glucose cotransporter-2 inhibitor, DWP16001, as an add-on therapy to insulin for diabetic dogs: A pilot study. Vet Med Sci 2024; 10:e1454. [PMID: 38686463 PMCID: PMC11058604 DOI: 10.1002/vms3.1454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 02/21/2024] [Accepted: 04/04/2024] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND Sodium-glucose cotransporter-2 (SGLT2) inhibitors are a novel class of anti-hyperglycaemic agents. OBJECTIVE This study aimed to evaluate the safety and the adjuvant glycaemic control effect of an SGLT2 inhibitor, DWP16001, in diabetic dogs receiving insulin treatment. METHODS Nineteen diabetic dogs receiving insulin treatment (NPH, porcine lente and glargine insulin) were divided into two groups according to dosing frequency: DWP TOD group (n = 10) and DWP SID group (n = 9). In the DWP TOD group, 0.025 mg/kg of DWP16001 was administered once every 3 days, whereas, in the DWP SID group, 0.025 mg/kg of DWP16001 was administered once a day. Food intake was maintained during the trial period. Hypoglycaemia, ketoacidosis or unexpected life-threatening reactions were assessed as adverse effects before and after DWP16001 administration. We compared insulin requirement reduction and blood glucose level control between two groups. RESULTS No specific adverse effects were observed during the clinical trial, and haematological parameter remained unchanged. Moreover, the fasting glucose levels and daily insulin dose in the DWP TOD group were lower than the pre-administration values, but not significantly different for 8 weeks. Systolic blood pressure, fructosamine and insulin dose decreased significantly in the DWP SID group compared to the DWP TOD group at 8 weeks (p < 0.05) without affecting food consumption. Among these patients, 10 patients were monitored while receiving DWP16001 for 12 months (DWP TOD group n = 5, DWP SID group n = 5). The fasting glucose and fructosamine levels and daily insulin dose were reduced in both groups at 12 months compared with those before receiving DWP16001. CONCLUSION When DWP16001, an SGLT2 inhibitor, was supplied to dogs with type 1 diabetes, no adverse effects were observed, and it was confirmed that the administered insulin dose can be reduced in controlling blood glucose.
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Affiliation(s)
- Ju‐Hyun An
- Department of Veterinary Emergency and Critical Care Medicine and Institute of Veterinary ScienceCollege of Veterinary MedicineKangwon National UniversityChuncheon‐siRepublic of Korea
| | - Han‐Sol Choi
- Laboratory of Veterinary Internal MedicineDepartment of Veterinary Clinical ScienceCollege of Veterinary MedicineSeoul National UniversityGwanak‐guSeoulRepublic of Korea
| | - Ji‐Soo Choi
- Daewoong PharmaceuticalLife Science InstituteYonginGyeonggi‐doRepublic of Korea
| | - Hyun‐Woo Lim
- Daewoong PharmaceuticalLife Science InstituteYonginGyeonggi‐doRepublic of Korea
| | - Wan Huh
- Daewoong PharmaceuticalLife Science InstituteYonginGyeonggi‐doRepublic of Korea
| | - Ye‐In Oh
- Department of Veterinary Internal MedicineCollege of Veterinary MedicineKyungpook National UniversityDaeguRepublic of Korea
| | - Joon Seok Park
- Daewoong PharmaceuticalLife Science InstituteYonginGyeonggi‐doRepublic of Korea
| | - Jumi Han
- Daewoong PharmaceuticalLife Science InstituteYonginGyeonggi‐doRepublic of Korea
| | - Soo Lim
- Department of Internal Medicine, Seoul National University College of MedicineSeoul National University Bundang HospitalSeongnamRepublic of Korea
| | - Chae‐Young Lim
- Nowon 24 hours N Animal Medical CenterNowon‐guSeoulRepublic of Korea
| | - Tae‐Hee Kim
- Laboratory of Veterinary Internal MedicineDepartment of Veterinary Clinical ScienceCollege of Veterinary MedicineSeoul National UniversityGwanak‐guSeoulRepublic of Korea
| | - Jae‐Bong Moon
- Daewoong petBoneunsa‐roGangnam‐guSeoulRepublic of Korea
| | - Hwa‐Young Youn
- Laboratory of Veterinary Internal MedicineDepartment of Veterinary Clinical ScienceCollege of Veterinary MedicineSeoul National UniversityGwanak‐guSeoulRepublic of Korea
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Jaffey JA, Kreisler R, Graves TK, Al-Nakkash L, Backus RC, Allison L. Ex Vivo Immune Function and Modulatory Effects of Calcitriol in Dogs with Naturally Occurring Diabetes Mellitus. Vet Sci 2024; 11:193. [PMID: 38787165 PMCID: PMC11125998 DOI: 10.3390/vetsci11050193] [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: 02/23/2024] [Revised: 04/10/2024] [Accepted: 04/21/2024] [Indexed: 05/25/2024] Open
Abstract
Human patients with type 1 diabetes mellitus (T1DM) are susceptible to several long-term complications that are related to glycemic control and immune dysregulation. Immune function remains relatively unexplored in dogs with naturally occurring diabetes mellitus (NODM). Calcitriol improves various aspects of immune function in a variety of species, but its effect in diabetic dogs remains unexplored. Therefore, the objectives of this study were to (i) evaluate immune function in dogs with NODM and determine if differences exist based on the level of clinical control and (ii) assess the immunomodulatory effects of calcitriol. Twenty diabetic dogs (clinically controlled, n = ten, not controlled, n = ten) and 20 non-diabetic, healthy control dogs were included in this prospective, case-control study. Whole blood was incubated with calcitriol (10-7 M) or negative control, after which the samples were divided for phagocytosis and leukocyte cytokine response experiments. The phagocytosis of opsonized Escherichia coli (E. coli) was evaluated with flow cytometry. The samples for leukocyte cytokine response evaluations were stimulated with lipopolysaccharide (LPS), lipoteichoic acid (LTA), or phosphate buffer solution (PBS; negative control), and tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-8, and IL-10 were measured in supernatant using a canine-specific multiplex bead-based assay. The leukocytes from diabetic dogs produced higher concentrations of IL-10 (p = 0.01), IL-6 (p < 0.0001), and IL-8 (p < 0.0001) than the control dogs while controlling for the intervention and stimulant. Calcitriol decreased the supernatant concentrations of TNF-α (p < 0.001) and IL-8 (p = 0.04) with concomitant increases in IL-6 (p = 0.005). Diabetic dogs had a lower percentage of leukocytes undergoing phagocytosis (p < 0.0001) but a higher number of bacteria phagocytized per cell (p = 0.001) when compared to the control dogs. Calcitriol had no effect on phagocytic capacity. Lastly, the status of clinical control in diabetic dogs did not yield differences in immune function. These results support that dogs with NODM exhibit immune dysregulation and warrant additional investigation.
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Affiliation(s)
- Jared A. Jaffey
- Department of Specialty Medicine, Midwestern University, College of Veterinary Medicine, Glendale, AZ 85308, USA; (T.K.G.); (L.A.)
| | - Rachael Kreisler
- Department of Pathology and Population Medicine, Midwestern University, College of Veterinary Medicine, Glendale, AZ 85308, USA;
| | - Thomas K. Graves
- Department of Specialty Medicine, Midwestern University, College of Veterinary Medicine, Glendale, AZ 85308, USA; (T.K.G.); (L.A.)
| | - Layla Al-Nakkash
- Department of Physiology, Midwestern University, College of Graduate Studies, Glendale, AZ 85308, USA;
| | - Robert C. Backus
- Department of Veterinary Medicine and Surgery, University of Missouri, College of Veterinary Medicine, Columbia, MO 65211, USA;
| | - Lauren Allison
- Department of Specialty Medicine, Midwestern University, College of Veterinary Medicine, Glendale, AZ 85308, USA; (T.K.G.); (L.A.)
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O'Kell AL, Davison LJ. Etiology and Pathophysiology of Diabetes Mellitus in Dogs. Vet Clin North Am Small Anim Pract 2023; 53:493-510. [PMID: 36854636 DOI: 10.1016/j.cvsm.2023.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
Canine diabetes results from a wide spectrum of clinical pathophysiological processes that cause a similar set of clinical signs. Various causes of insulin deficiency and beta cell loss, insulin resistance, or both characterize the disease, with genetics and environment playing a role. Understanding the genetic and molecular causes of beta cell loss will provide future opportunities for precision medicine, both from a therapeutic and preventative perspective. This review presents current knowledge of the etiology and pathophysiology of canine diabetes, including the importance of disease classification. Examples of potential targets for future precision medicine-based approaches to therapy are discussed.
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Affiliation(s)
- Allison L O'Kell
- Department of Small Animal Clinical Sciences, University of Florida, 2015 Southwest 16th Avenue, Gainesville, FL 32610, USA.
| | - Lucy J Davison
- Royal Veterinary College, Clinical Sciences and Services, Hawkshead Lane, Hertfordshire AL9 7TA, UK.
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Harris-Samson AR, Rand J, Ford SL. Detemir improves diabetic regulation in poorly controlled diabetic dogs with concurrent diseases. J Am Vet Med Assoc 2023; 261:327-335. [PMID: 36656678 DOI: 10.2460/javma.22.09.0402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
OBJECTIVE This study evaluated the use of detemir for treating diabetic dogs with comorbidities that were poorly controlled with intermediate-acting insulins. ANIMALS 7 insulin-treated diabetic dogs. PROCEDURES Retrospective pilot study. Dogs were treated with detemir for at least 3 months, and glycemia was assessed by the owners at home initially 2 to 4 times daily for 6 to 8 weeks and twice daily thereafter. Clinical evaluations occurred on days 7 to 14, day 30, and then every 60 to 90 days, and dosage adjustments of detemir occurred as needed to control glycemia. RESULTS The mean, peak, nadir, morning, and evening preinsulin daily blood glucose concentrations were significantly lower after dosing with detemir for 1, 3, or 6 months and during the last month of treatment compared to the final month of treatment with intermediate-acting insulin. Intermediate-acting insulins resulted in significantly worse glycemic control than detemir in all 3 categories of control. The odds of a biochemical hypoglycemic measurement with detemir were not significantly different compared to intermediate-acting insulins. Clinical hypoglycemia did not occur following detemir treatment. When insulin was withheld because of low morning preinsulin blood glucose concentration < 6.7 mmol/L (≤ 120 mg/dL) and dogs were fed, mean blood glucose concentration was significantly higher 1 hour later. Glucose concentrations were also significantly higher 12 hours later on days when insulin was withheld in the morning or evening for either 1 or 12 hours. CLINICAL RELEVANCE Detemir is useful in diabetic dogs with other comorbidities and can be considered an alternative treatment in poorly controlled diabetic dogs.
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Affiliation(s)
| | - Jacquie Rand
- 2School of Veterinary Science, The University of Queensland, Gatton, QLD, Australia.,3Australian Pet Welfare Foundation, Kenmore, QLD, Australia
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Jaffey JA, Okwumabua O, Graves TK, Al-Nakkash L, Monasky R, Wilson A, Thangamani S. Evaluation of Candida spp. and Other Fungi in Feces from Dogs with Naturally Occurring Diabetes Mellitus. Vet Sci 2022; 9:vetsci9100567. [PMID: 36288180 PMCID: PMC9609726 DOI: 10.3390/vetsci9100567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/09/2022] [Accepted: 10/11/2022] [Indexed: 11/05/2022] Open
Abstract
Simple Summary Diabetes mellitus is a common endocrine disorder in dogs that is similar to type 1 diabetes mellitus (T1DM) in humans. Candida spp. is a common non-pathogenic fungi that is identified more commonly and in higher amounts in humans with T1DM, including the gastrointestinal tract. This change to the distribution of microorganisms that inhabit the intestine has potential to affect glycemic control and even spread to other organs and cause severe illness. There are no studies that have investigated whether diabetic dogs, like humans, have alterations to the intestinal mycobiome. Therefore, our study sought to determine whether differences exist in the types of fungi cultured from feces in diabetic dogs and non-diabetic healthy control dogs. In addition, we wanted to find out if there were variables associated with fungi colonization. Diabetic dogs had more quantitative fungal growth than controls and females were more likely to yield growth than males. Diabetic dogs were also more likely to have Candida spp. colonized from feces. Glycemic control was also seemingly associated with growth of Candida spp. in diabetic dogs. Our results indicate that the intestinal mycobiome is altered in diabetic dogs with increased prevalence of Candida spp. and quantitative growth of fungi. Abstract Diabetes mellitus is a common endocrinopathy in dogs and in most cases is analogous to type 1 diabetes mellitus (T1DM) in humans. Candida spp. is a common commensal fungi with higher prevalence and magnitude of growth in humans with T1DM. There is currently no published information about the fungal microbiome in diabetic dogs. Therefore, the objectives of this study were to (i) determine whether diabetic dogs were more likely to have Candida spp. or other types of fungi from feces compared to non-diabetic controls, and (ii) identify variables associated with fungi colonization. Fourteen diabetic dogs and 14 age, sex, and breed matched non-diabetic healthy control dogs were included in this prospective case–control study. Matrix assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) was used for fungal identification. Diabetic dogs had greater quantitative fungal growth compared to controls (p = 0.004). Moreover, female dogs were more likely to have fungi colonization than males (p = 0.02). All instances of Candida spp. and Aspergillus spp. colonization were exclusively identified in diabetic dogs. Serum fructosamine concentration was higher in diabetic dogs with fecal colonization of Candida spp. compared to diabetic dogs without growth (p = 0.03). Our results indicate that the fungal microbiome in feces is altered in diabetic dogs, which seem to favor an increased prevalence of Candida spp. and higher quantitative fungal growth. Moreover, female sex and glycemic control could affect the intestinal mycobiome.
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Affiliation(s)
- Jared A. Jaffey
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
- Correspondence: (J.A.J.); (S.T.)
| | - Ogi Okwumabua
- Department of Pathology, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Thomas K. Graves
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Layla Al-Nakkash
- Department of Physiology, College of Graduate Studies, Midwestern University, Glendale, AZ 85308, USA
| | - Ross Monasky
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Alec Wilson
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
- Department of Pathology, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Shankar Thangamani
- Department of Pathology, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47906, USA
- Purdue Institute for Immunology, Inflammation and Infectious Diseases (PI4D), West Lafayette, IN 47906, USA
- Correspondence: (J.A.J.); (S.T.)
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Seasonality and geography of diabetes mellitus in United States of America dogs. PLoS One 2022; 17:e0272297. [PMID: 35930583 PMCID: PMC9355170 DOI: 10.1371/journal.pone.0272297] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 07/18/2022] [Indexed: 12/03/2022] Open
Abstract
The diagnosis of type 1 diabetes mellitus (DM) in humans is associated with high altitude, few sunshine hours, cold climate, and winter. The goals of this study were to investigate seasonal and geographic patterns of DM diagnosis in United States of America (USA) dogs with juvenile and mature onset DM. Data were collected by means of an online survey widely distributed in the USA through breed clubs, academic veterinary institutions, private veterinary referral practices, social media outlets, and the American Kennel Club. Juvenile DM (JDM) and mature onset DM were defined as DM with an age of onset <365 days and DM with an age of onset ≥365 days, respectively. Meteorological seasons were defined as: winter from December through February, spring from March through May, summer from June through August, and fall from September through November. Four geographic regions were also defined as the West, North, South, and Central regions of the USA. Nonoverlapping 95% confidence intervals (CI) for season, geographic region, and breed specific proportions of dogs with JDM were considered statistically significantly different. The study included 933 dogs with mature onset DM and 27 dogs with JDM. Dogs were diagnosed with DM significantly more in the winter and northern USA compared to all other seasons and all other geographic regions, respectively. The prevalence of JDM among dogs with DM was 2.8%. The proportion of dogs with JDM among pure breeds was not significantly different than the proportion of JDM in mixed breed dogs. It is concluded that winter and cold climate could be shared environmental factors influencing DM expression in dogs and humans. Additionally, pure breed dogs do not appear to be at increased risk for JDM compared to mixed breed dogs, indicating that factors other than genetics could influence spontaneous JDM development in dogs.
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Ringstad NK, Lingaas F, Thoresen SI. Breed distributions for diabetes mellitus and hypothyroidism in Norwegian dogs. Canine Med Genet 2022; 9:9. [PMID: 35610669 PMCID: PMC9128090 DOI: 10.1186/s40575-022-00121-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/13/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Diabetes mellitus (DM) and hypothyroidism are common canine endocrinopathies. Both canine DM and primary hypothyroidism are assumed to originate from autoimmune destruction of the respective endocrine glands and have been associated with the major histocompatibility complex (MHC) gene region. This study aims to investigate breed distributions for DM and hypothyroidism in the Norwegian canine population by calculating odds ratios (OR) from two different comparator groups. METHODS Results from canine serum samples submitted from 2001 to 2018 to the Veterinary Clinical Pathology Laboratory (VCPL) at the Faculty of Veterinary Medicine, Norwegian University of Life Sciences for analysis of fructosamine and thyroid hormones in serum were used as cases in a retrospective bivariate analysis of canine breeds. The ORs were calculated as a measure of risk for the included breeds, where all the submitted blood samples to the VCPL and dogs registered in the Norwegian Kennel Club (NKK), the national organization for dog owners, were used as two comparator groups. RESULTS Significant differences in disease prevalence between breeds were discovered using both comparator groups. Australian terrier, Swedish lapphund, Samoyed, and Schipperke were at highest risk for DM. German Shepherd, Golden retriever, German pointing dog, and Collie presented as the breeds with lowest risk for DM. For hypothyroidism, Schnauzer, Eurasier, Dunker, and English setter were at highest risk for developing the disease. The breeds at lowest risk of developing hypothyroidism were Rottweiler, Dachshund, German shepherd, and Border collie. The results from the different comparator groups gave different ORs and ranks, but the breeds with highest and lowest odds showed the same susceptibility using both comparators. CONCLUSIONS These findings support that there are breeds more and less prone to develop DM and hypothyroidism. A strong genetic predisposition involved in the aetiology of these two diseases is therefore likely. Interestingly, there also appeared to be an inverse relationship of odds for the two diseases for some of the breeds since some breeds that had a high OR for DM or hypothyroidism had a lower OR for the other disease. This indicates that there may be different risk alleles/haplotypes for the two diseases. The possible aetiological relationship between canine DM and hypothyroidism should be further investigated.
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Affiliation(s)
- N K Ringstad
- Department of Companion Animal Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Ås, Norway.
| | - F Lingaas
- Department of Preclinical Sciences and Pathology, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Ås, Norway
| | - S I Thoresen
- Department of Preclinical Sciences and Pathology, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Ås, Norway.
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Lee E, Kang S, Shim J, Jeong D, Jeong Y, Ahn J, Seo K. Quantification of tear glucose levels and their correlation with blood glucose levels in dogs. Vet Med Sci 2022; 8:1816-1824. [PMID: 35305285 PMCID: PMC9297779 DOI: 10.1002/vms3.788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background No previous studies have quantified tear glucose (TG) levels in dogs or compared changes in TG and blood glucose (BG) concentrations. Objective To quantify TG concentration and evaluate its correlation with BG level in dogs. Methods Twenty repetitive tests were performed in alternate eyes of four dogs, with a minimum washout period of 1 week. Tears and blood were collected at 30‐min intervals with successive glucose injections (1 g/kg) every 30 min. Cross‐correlations of BG and TG levels were assessed. The delay and association between TG and corresponding BG levels were analysed for each dog; samples were collected at 5‐min intervals. The tears were collected using microcapillary tubes. Collected tears and blood were analysed for glucose concentration using a colorimetric assay and commercially available glucometer, respectively. Results The average baseline BG and TG levels were 4.76 ± 0.58 and 0.39 ± 0.04 mmol/L, respectively. Even with highly fluctuating BG levels, a significant cross‐correlation coefficient (r = 0.86, p < 0.05) was observed between changes of BG and TG levels. The delay time between BG and TG levels was 10 min. On average, BG levels were 16.34 times higher than TG levels. There was strong correlation between BG and TG levels (rs = 0.80, p < 0.01). Significant differences in TG concentrations between normoglycaemia, mild hyperglycaemia, and severe hyperglycaemia were found (p < 0.05). Conclusions Canine TG concentrations have not been quantified previously. Our findings suggest preliminary data for future research on TG levels in dogs and show TG measurement could be used to screen for diabetes mellitus in dogs.
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Affiliation(s)
- Eunji Lee
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - Seonmi Kang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - Jaeho Shim
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - Dajeong Jeong
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - Youngseok Jeong
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - Junyeong Ahn
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - Kangmoon Seo
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
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Urinary Proteome Differences in Canine Diabetes with and without the Presence of Microalbuminuria. Animals (Basel) 2022; 12:ani12060748. [PMID: 35327145 PMCID: PMC8944454 DOI: 10.3390/ani12060748] [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: 01/16/2022] [Revised: 03/02/2022] [Accepted: 03/10/2022] [Indexed: 11/17/2022] Open
Abstract
Simple Summary Canine diabetes is a serious disease, which can lead to numerous complications. There are limited data on urine proteomics in dogs, and none of the effect of diabetes mellitus on the urine proteome. In this study we aimed to analyze the protein composition of the urine collected from the healthy animals and compare it with two diabetic groups (normoalbuminuric and microalbuminuric). There are significant differences between these three groups, and we believe that the identified proteins hold promise as a potential diagnostic tool, which can be later on used in clinical practice, and for better understanding of the disease. Abstract In this study we aimed to analyze the protein composition of the urine collected from the healthy animals and compare it to the two diabetic groups (DM I normoalbuminuric diabetic dogs; DM II diabetic dogs with microalbuminuria). We tried to identify potential urinary proteins which could be up- or downregulated in diabetic patients even before the appearance of microalbuminuria. Methods: After obtaining urine, we performed two-dimensional electrophoresis, followed by Delta2D software analysis, which allowed for selection and identification with MALDI-TOF spectrometry, statistically significant differentially expressed proteins. Our study revealed 286 common protein spots on 2D gels from the diabetic and control group. From these proteins five were positively identified by MALDI-TOF MS. To further evaluate the five differentiating proteins, the Panther program was used to assign them to appropriate biological process. Conclusion: Significant number of identified proteins play a role in intracellular signaling—vesicle formation, bonding, transport through membranes. This may suggest that first signs of kidney diabetic cellular impairment may be seen in the urine composition before any clinical signs occur.
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Relationship between HbA1c, fructosamine and clinical assessment of glycemic control in dogs. PLoS One 2022; 17:e0264275. [PMID: 35213623 PMCID: PMC8880912 DOI: 10.1371/journal.pone.0264275] [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: 08/25/2021] [Accepted: 02/07/2022] [Indexed: 12/16/2022] Open
Abstract
Background Serum fructosamine is a routine test used for clinical monitoring of diabetes mellitus (DM) but the usefulness of HbA1c for this purpose has not been extensively studied. Hypothesis The study aimed to compare the ability of blood HbA1c and serum fructosamine tests to correctly classify DM control determined using a clinically-based assessment. Animals 28 client-owned dogs with naturally-occurring diabetes mellitus. Methods Cross-sectional observational study. Ability of fructosamine and HbA1c tests to classify diabetes control in dogs was determined. Results Clinical assessment classified 50% of dogs as having good diabetic control and 82% as having acceptable diabetic control. Analysis using Cohen’s kappa test showed that agreements between fructosamine and HbA1c results and the clinical assessment ranged from poor to fair. Fructosamine and HbA1c results from each dog showed a moderate correlation. Overall, the HbA1c test showed the best agreement with the clinical assessment when diabetes control was considered either acceptable or unacceptable, although the strength of agreement was considered fair (kappa = 0.27). Conclusions and clinical importance The HbA1c concentration was found to be more consistent with clinical evaluation of diabetes control than was the serum fructosamine concentration. The HbA1c level is a useful tool for assessment of glycemic status in diabetic dogs but should be used alongside other tests for outpatient monitoring of clinically stable diabetic dogs.
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Zeugswetter FK, Beer R, Schwendenwein I. Evaluation of fructosamine concentration as an index marker for glycaemic control in diabetic dogs. Vet Rec 2021; 190:e244. [PMID: 33870504 DOI: 10.1002/vetr.244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 01/12/2021] [Accepted: 02/12/2021] [Indexed: 12/15/2022]
Abstract
BACKGROUND Although fructosamine is a commonly used surrogate marker to assess glycaemic control in diabetic dogs, its diagnostic accuracy has been questioned. The main objective of this study was to evaluate the reliability of fructosamine measurements to diagnose well and poorly controlled diabetes mellitus (DM), using continuous glucose monitoring as a gold standard. METHODS Twenty-four dogs with treated DM and continuous glucose monitoring for mean (±SD) 13.1 (±1.7) days were retrospectively analysed. Two assessment strategies were applied to categorize glycaemic control, and fructosamine concentrations were determined shortly after sensor cessation using a colorimetric assay. RESULTS Correlations of individual fructosamine concentrations with mean glucose as well as percentage of measurements > 15 mmol/L were not significant (p = 0.372, p = 0.129). Fructosamine did not differ between dogs with and without hypoglycaemic episodes (p = 0.64). Receiver operating characteristic analysis for fructosamine to diagnose either good or poor glycaemic control revealed AUC values of 0.71 (p = 0.025) indicating moderate accuracy, and 0.7 (p = 0.135) indicating AUC is non-discriminatory, respectively. The respective positive likelihood ratios for the optimal cutoffs to identify good (<396 μmol/L) and poor control (>449 μmol/L) were three. CONCLUSIONS Fructosamine measurement is an imperfect surrogate marker for classifying glycaemic control in diabetic dogs and can only complement serial glucose measurements.
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Affiliation(s)
- Florian K Zeugswetter
- Clinical Department for Small Animals and Horses, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Raphael Beer
- Clinical Department for Small Animals and Horses, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Ilse Schwendenwein
- Department of Pathobiology, Central Laboratory, University of Veterinary Medicine Vienna, Vienna, Austria
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Sanz CR, Sevane N, Pérez-Alenza MD, Valero-Lorenzo M, Dunner S. Polymorphisms in canine immunoglobulin heavy chain gene cluster: a double-edged sword for diabetes mellitus in the dog. Anim Genet 2021; 52:333-341. [PMID: 33621396 DOI: 10.1111/age.13047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/19/2021] [Indexed: 02/06/2023]
Abstract
Insulin deficiency diabetes (IDD) in dogs is an endocrine disease similar to human type 1 diabetes. There are breeds more commonly affected, such as Yorkshire Terrier and Samoyed, suggesting an underlying genetic component. However, the genetic basis for canine diabetes mellitus (DM) is not fully established. We conducted both whole-genome scans for selection signatures and GWASs to compare the genomes of 136 dogs belonging to 29 breeds previously described at low or high risk for developing DM. Candidate variants were tested in dogs with a diagnosis of IDD and controls attending the Complutense Veterinary Teaching Hospital. The only genomic region under selection (CFA8:72 700 000-74 600 000; CanFam3.1) retrieved by our analyses is included in the immunoglobulin heavy chain gene cluster, which has already been related to human human type 1 diabetes susceptibility. This region contains two non-synonymous variants, rs852072969 and rs851728071, showing significant associations with high or low risk for IDD, respectively. The first variant, rs852072969, alters a protein poorly characterised in the dog. In contrast, rs851728071 was predicted to block the synthesis of an immunoglobulin variable (V) domain in breeds at low risk for DM. Although a large and diverse V gene repertoire is thought to offer a fitness advantage, we suggest that rs851728071 prevents the formation of an auto-reactive immunoglobulin V domain probably involved in the pathophysiology of IDD and, thus, decreases the risk for the disease. These results should be interpreted with caution until the functional roles of the proposed variants have been proved in larger studies.
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Affiliation(s)
- C R Sanz
- Department of Animal Production, Veterinary Faculty, Complutense University of Madrid, Madrid, 28040, Spain
| | - N Sevane
- Department of Animal Production, Veterinary Faculty, Complutense University of Madrid, Madrid, 28040, Spain
| | - M D Pérez-Alenza
- Department of Animal Medicine, Surgery and Pathology, Veterinary Faculty, Complutense University of Madrid, Madrid, 28040, Spain
| | - M Valero-Lorenzo
- Department of Animal Production, Veterinary Faculty, Complutense University of Madrid, Madrid, 28040, Spain
| | - S Dunner
- Department of Animal Production, Veterinary Faculty, Complutense University of Madrid, Madrid, 28040, Spain
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13
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Brito-Casillas Y, Melián C, Holder A, Wiebe JC, Navarro A, Quesada-Canales Ó, Expósito-Montesdeoca AB, Catchpole B, Wägner AM. Studying the heterogeneous pathogenesis of canine diabetes: Observational characterization of an island population. Vet Med Sci 2021; 7:1071-1081. [PMID: 33621402 PMCID: PMC8294365 DOI: 10.1002/vms3.452] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 01/13/2021] [Accepted: 02/02/2021] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Canine diabetes mellitus has mostly been studied in northern European, Australian and American populations, whereas other regions have received less attention. OBJECTIVES We evaluated the epidemiological, clinical and histopathological features of diabetic dogs in Gran Canaria, Spain. METHODS Prevalence and incidence were estimated. Clinical features were analysed, and serum and genomic DNA were obtained. Dogs with presumed idiopathic or immune-mediated diabetes, were DLA-typed and antibodies against GAD65 and IA-2 were assessed. Pancreases from ten diabetic dogs were examined and compared with pancreases from non-diabetic dogs. RESULTS AND CONCLUSIONS Twenty-nine diabetic dogs were identified in a population of 5,213 (prevalence: 0.56%; incidence: 0.37%). Most were female (79%) and sexually intact (87% of females, 83% of males). Diabetes secondary to dioestrus (55.2%) and insulin-deficient diabetes (20.7%) were the most frequent types. Antibodies against GAD65 and IA-2 were identified in two out of five cases and DLA-genotyping revealed novel haplotypes. Breed distribution differed between diabetic and non-diabetic dogs. Reduced number of pancreatic islets and β-cell mass were observed, with vacuolation of islet cells and ductal epithelium. In this population, where neutering is not standard practice, diabetes secondary to dioestrus is the most frequent diabetes subtype. Genetic susceptibility also differed from previous studies. These results support the heterogeneous pathogenesis of canine diabetes.
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Affiliation(s)
- Yeray Brito-Casillas
- Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain.,Servicio de Endocrinología y Nutrición, Complejo Hospitalario Universitario Insular Materno Infantil de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - Carlos Melián
- Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain.,Departamento de Patología Animal, Producción Animal, Bromatología y Tecnología de los Alimentos, ULPGC, Arucas, Spain
| | - Angela Holder
- Department of Pathology & Pathogen Biology, Royal Veterinary College, University of London, London, UK
| | - Julia C Wiebe
- Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain.,Servicio de Endocrinología y Nutrición, Complejo Hospitalario Universitario Insular Materno Infantil de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - Ana Navarro
- Grupo de Investigación en Acuicultura (GIA), ULPGC, Arucas, Spain
| | - Óscar Quesada-Canales
- Unidad de Histología y Patología Veterinaria, Instituto Universitario de Sanidad Animal (IUSA), ULPGC, Arucas, Canarias, Spain
| | - Ana B Expósito-Montesdeoca
- Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain.,Servicio de Endocrinología y Nutrición, Complejo Hospitalario Universitario Insular Materno Infantil de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - Brian Catchpole
- Department of Pathology & Pathogen Biology, Royal Veterinary College, University of London, London, UK
| | - Ana M Wägner
- Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain.,Servicio de Endocrinología y Nutrición, Complejo Hospitalario Universitario Insular Materno Infantil de Gran Canaria, Las Palmas de Gran Canaria, Spain
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14
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Genetics of canine diabetes mellitus part 1: Phenotypes of disease. Vet J 2021; 270:105611. [PMID: 33641807 DOI: 10.1016/j.tvjl.2021.105611] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 01/05/2021] [Accepted: 01/12/2021] [Indexed: 01/09/2023]
Abstract
This two-part article discusses the mechanisms by which genetic variation can influence the risk of complex diseases, with a focus on canine diabetes mellitus. In Part 1, presented here, the importance of accurate methods for classifying different types of diabetes will be discussed, since this underpins the selection of cases and controls for genetic studies. Part 2 will focus on our current understanding of the genes involved in diabetes risk, and the way in which new genome sequencing technologies are poised to reveal new diabetes genes in veterinary species.
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15
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Denyer AL, Catchpole B, Davison LJ. Genetics of canine diabetes mellitus part 2: Current understanding and future directions. Vet J 2021; 270:105612. [PMID: 33641811 DOI: 10.1016/j.tvjl.2021.105612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 01/05/2021] [Accepted: 01/12/2021] [Indexed: 02/08/2023]
Abstract
Part 1 of this 2-part review outlined the importance of disease classification in diabetes genetic studies, as well as the ways in which genetic variants may contribute to risk of a complex disease within an individual, or within a particular group of individuals. Part 2, presented here, describes in more detail our current understanding of the genetics of canine diabetes mellitus compared to our knowledge of the human disease. Ongoing work to improve our knowledge, using new technologies, is also introduced.
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Affiliation(s)
- Alice L Denyer
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hatfield, UK
| | - Brian Catchpole
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hatfield, UK
| | - Lucy J Davison
- Department of Clinical Sciences and Services, Royal Veterinary College, Hatfield, UK; Wellcome Centre for Human Genetics, University of Oxford, Oxford, UK.
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16
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The Serum and Saliva Proteome of Dogs with Diabetes Mellitus. Animals (Basel) 2020; 10:ani10122261. [PMID: 33271797 PMCID: PMC7760505 DOI: 10.3390/ani10122261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/20/2020] [Accepted: 11/25/2020] [Indexed: 01/11/2023] Open
Abstract
This study aims to evaluate the changes in salivary and serum proteomes that occur in canine diabetes mellitus type-1 (DM) through a high-throughput quantitative proteomic analysis. The proteomes of 10 paired serum and saliva samples from healthy controls (HC group, n = 5) and dogs with untreated DM (DM group, n = 5) were analyzed using Tandem Mass Tags (TMT)-based proteomic approach. Additionally, 24 serum samples from healthy controls and untreated DM were used to validate haptoglobin in serum. The TMT analysis quantified 767 and 389 proteins in saliva and serum, respectively. Of those, 16 unique proteins in serum and 26 in saliva were differently represented between DM and HC groups. The verification of haptoglobin in serum was in concordance with the proteomic data. Our results pointed out changes in both saliva and serum proteomes that reflect different physiopathological changes in dogs with DM. Although some of the proteins identified here, such as malate dehydrogenase or glyceraldehyde-3-phosphate dehydrogenase, were previously related with DM in dogs, most of the proteins modulated in serum and saliva are described in canine DM for the first time and could be a source of potential biomarkers of the disease. Additionally, the molecular function, biological process, pathways and protein class of the differential proteins were revealed, which could improve the understanding of the disease's pathological mechanisms.
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17
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Denyer AL, Massey JP, Davison LJ, Ollier WER, Catchpole B, Kennedy LJ. Dog leucocyte antigen (DLA) class II haplotypes and risk of canine diabetes mellitus in specific dog breeds. Canine Med Genet 2020; 7:15. [PMID: 33292601 PMCID: PMC7603736 DOI: 10.1186/s40575-020-00093-9] [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: 06/01/2020] [Accepted: 09/07/2020] [Indexed: 12/13/2022] Open
Abstract
Background Canine diabetes mellitus (DM) is a common endocrine disease in domestic dogs. A number of pathological mechanisms are thought to contribute to the aetiopathogenesis of relative or absolute insulin deficiency, including immune-mediated destruction of pancreatic beta cells. DM risk varies considerably between different dog breeds, suggesting that genetic factors are involved and contribute susceptibility or protection. Associations of particular dog leucocyte antigen (DLA) class II haplotypes with DM have been identified, but investigations to date have only considered all breeds pooled together. The aim of this study was to analyse an expanded data set so as to identify breed-specific diabetes-associated DLA haplotypes. Methods The 12 most highly represented breeds in the UK Canine Diabetes Register were selected for study. DLA-typing data from 646 diabetic dogs and 912 breed-matched non-diabetic controls were analysed to enable breed-specific analysis of the DLA. Dogs were genotyped for allelic variation at DLA-DRB1, -DQA1, -DQB1 loci using DNA sequence-based typing. Genotypes from all three loci were combined to reveal three-locus DLA class II haplotypes, which were evaluated for statistical associations with DM. This was performed for each breed individually and for all breeds pooled together. Results Five dog breeds were identified as having one or more DLA haplotype associated with DM susceptibility or protection. Four DM-associated haplotypes were identified in the Cocker Spaniel breed, of which one haplotype was shared with Border Terriers. In the three breeds known to be at highest risk of DM included in the study (Samoyed, Tibetan Terrier and Cairn Terrier), no DLA haplotypes were found to be associated with DM. Conclusions Novel DLA associations with DM in specific dog breeds provide further evidence that immune response genes contribute susceptibility to this disease in some cases. It is also apparent that DLA may not be contributing obvious or strong risk for DM in some breeds, including the seven breeds analysed for which no associations were identified.
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Affiliation(s)
- A L Denyer
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hatfield, UK
| | - J P Massey
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT, UK
| | - L J Davison
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, UK.,Department of Clinical Sciences and Services, Royal Veterinary College, Hatfield, UK
| | - W E R Ollier
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT, UK
| | - B Catchpole
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hatfield, UK
| | - L J Kennedy
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT, UK.
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18
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Reference Interval of Hemoglobin A1c and Influence of Hematological Parameters on Its Serum Concentration in Dogs. Vet Med Int 2020; 2020:7150901. [PMID: 33082928 PMCID: PMC7563062 DOI: 10.1155/2020/7150901] [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: 02/11/2020] [Revised: 08/11/2020] [Accepted: 09/24/2020] [Indexed: 11/17/2022] Open
Abstract
HbA1c could be an alternative to fructosamine as a marker for glucose levels over a longer period. In this study, we calculated a reference interval for HbA1c in dogs and investigated the correlation of HbA1c with hemoglobin and different hematological parameters. In total, 110 blood samples from dogs were investigated. Significant negative correlations were found between HbA1c and erythrocyte count, hemoglobin concentration, as well as hematocrit. There was a tendency in the red cell distribution width. No significant correlation was found in the reticulocyte number and the erythrocyte indices. In conclusion, there is an association of different blood parameters with the HbA1c concentration, which have to be considered for the interpretation of HbA1c.
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19
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Heeley AM, O’Neill DG, Davison LJ, Church DB, Corless EK, Brodbelt DC. Diabetes mellitus in dogs attending UK primary-care practices: frequency, risk factors and survival. Canine Med Genet 2020. [PMCID: PMC7288514 DOI: 10.1186/s40575-020-00087-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Background Diabetes mellitus (DM) is an important endocrine disorder of dogs. The objectives of this study were to estimate prevalence and incidence of DM in dogs, and to explore risk factors for DM and the survival of DM cases in primary-care clinics in the UK. Results A case-control study nested in the cohort of dogs (n = 480,469) aged ≥3 years presenting at 430 VetCompass clinics was used to identify risk factors for DM, using multivariable logistic regression. Overall 409 new and 863 pre-existing DM cases (total 1272) were identified in 2016, giving an apparent annual prevalence of 0.26% (95% confidence interval (CI): 0.25–0.28%), and an annual incidence risk of 0.09% (95%CI: 0.08–0.09%) in dogs aged ≥3 years. Factors associated with increased odds for DM diagnosis were all age categories > 8 years, female entire dogs (odds ratio (OR): 3.03, 95% CI 1.69–5.44, p < 0.001) and male neutered dogs (OR: 1.99, 95% CI 1.18–3.34, p = 0.010) compared to male entire dogs, Border Terriers (OR: 3.37, 95% CI 1.04–10.98, p = 0.043) and West Highland White Terriers (WHWT) (OR: 2.88, 95% CI 1.49–5.56, p = 0.002) compared to crossbreeds. Dogs that had received previous glucocorticoid treatment (OR: 2.19, 95% CI 1.02–4.70, p = 0.044) and those with concurrent conditions (documented obese, pancreatitis, hyperadrenocorticism) also had increased odds for DM diagnosis. Cox regression modelling was used to evaluate factors associated with survival in the 409 incident DM cases in 2016. Increased hazard of death following diagnosis of DM was shown in dogs that were ≥ 10 years age, Cocker Spaniels (HR: 2.06, 95% CI 1.06–4.01, p = 0.034) compared to crossbreeds, had a blood glucose (BG) level at diagnosis > 40 mmol/L (HR: 2.73, 95% CI 1.35–5.55, p = 0.005) compared to < 20 mmol/L at diagnosis, or had received previous glucocorticoid treatment (HR: 1.86, 95% CI 1.21–2.86, p = 0.005). Dogs at reduced hazard of death included neutered dogs (HR: 0.58, 95% CI 0.42–0.79, p = 0.001), Border Collies (HR: 0.39, 95% CI 0.17–0.87, p = 0.022) and those starting insulin treatment (HR: 0.08 95% CI 0.05–0.12, p < 0.001). Conclusions Certain breeds and concurrent health conditions are associated with an increased risk of DM. In addition to certain signalment factors, a high BG level at diagnosis and prior glucocorticoid treatment were adversely associated with survival of dogs with DM.
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20
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Yoon S, Fleeman LM, Wilson BJ, Mansfield CS, McGreevy P. Epidemiological study of dogs with diabetes mellitus attending primary care veterinary clinics in Australia. Vet Rec 2020; 187:e22. [PMID: 32051292 DOI: 10.1136/vr.105467] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 10/31/2019] [Accepted: 12/16/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND The objectives of this study were to establish the prevalence, risk factors and comorbidities/sequelae for diabetes mellitus (DM) in Australian dogs presented to first-opinion veterinary practices. METHODS Electronic patient records of dogs (n=134,329) attending 152 veterinary clinics during 2017 were sourced through VetCompass Australia. They included 418 dogs with DM; a prevalence of 0.36 per cent (95 per cent CI 0.33 per cent to 0.39 per cent) in Australian dogs attending these veterinary clinics. By comparing with the reference group of rarer breeds and unidentified crossbreeds, multivariable modelling was used to reveal breeds (and their crosses) with significantly higher odds of having DM. RESULTS The results revealed that breeds (and their crosses) with significantly higher odds of having DM were Australian terriers (ORs=7.93 (95 per cent CI 2.83 to 22.27)), Siberian huskies (OR=6.24 (95 per cent CI 2.51 to 15.54)), English springer spaniels (OR=5.37 (95 per cent CI 1.48 to 19.53)), West Highland white terriers (OR=4.85 (95 per cent CI 2.55 to 9.25)), miniature schnauzers (OR=3.47 (95 per cent CI 1.16 to 10.35)), all types of poodles (OR=3.41 (95 per cent CI 2.07 to 5.61)), bichon frises (OR=3.41 (95 per cent CI 1.65 to 7.01)), schnauzers (OR=3.18 (95 per cent CI 1.42 to 7.11)) and cavalier King Charles spaniels (CKCS; OR=1.84 (95 per cent CI 1.08 to 3.13)). Breeds with lower risk were German shepherd dogs (OR=0.11 (95 per cent CI 0.01 to 0.84)), golden retrievers (OR=0.09 (95 per cent CI 0.01 to 0.68)) and boxers (no cases identified). Fisher's exact tests showed that labradoodles were diagnosed significantly more often than purebred Labradors (P=0.04) and did not differ significantly from poodles (P=0.81). Cavoodles did not differ significantly from either CKCS (p~1.00) or poodles (P=0.12). Spoodles were significantly less diagnosed than poodles (P=0.003) but did not differ from cocker spaniels (P=0.66). Desexed male dogs had a higher odds of DM than entire male (OR=0.62 (95 per cent CI 0.39 to 0.98)) and desexed female dogs (OR=0.76 (95 per cent CI 0.61 to 0.96)). Comorbidities/sequelae associated with canine DM included suspected pancreatitis (OR 10.58 (95 per cent CI 5.17 to 22.78)), cataracts (OR 9.80 (95 per cent CI 5.65 to 17.35)), hyperadrenocorticism (OR 6.21 (95 per cent CI 3.29 to 11.88)), urinary tract infection (OR 5.09 (95 per cent CI 1.97 to 13.41)) and hypothyroidism (OR 4.10 (95 per cent CI 1.08 to 15.58)). CONCLUSIONS Breeds at most risk included Australian terriers and Siberian huskies as previously reported, as well as, for the first time, English springer spaniels. In contrast to other populations where there is female predisposition for DM, desexed male dogs in Australia were at increased risk for DM compared with both entire males and desexed females. This predisposition for desexed males to develop DM warrants further investigation.
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Affiliation(s)
- Samuel Yoon
- Sydney School of Veterinary Science, New South Wales, Sydney, Australia
| | | | - Bethany J Wilson
- Sydney School of Veterinary Science, New South Wales, Sydney, Australia
| | - Caroline S Mansfield
- Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
| | - Paul McGreevy
- Sydney School of Veterinary Science, New South Wales, Sydney, Australia
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Lester M, O'Kell AL. Exploratory analysis of anti-insulin antibodies in diabetic dogs receiving recombinant human insulin. J Small Anim Pract 2020; 61:236-240. [PMID: 32012274 DOI: 10.1111/jsap.13102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 11/19/2019] [Accepted: 11/24/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVES To quantify anti-insulin antibodies in diabetic dogs treated with recombinant human insulin and to determine if insulin dosage or duration of treatment differed between anti-insulin antibody-positive and -negative diabetic dogs. MATERIALS AND METHODS Descriptive preliminary study using serum from 24 client-owned diabetic dogs treated for a minimum of 2 weeks with recombinant human insulin, and 24 client-owned healthy control dogs without diabetes. Sera were analysed by radioimmunoassay for anti-insulin antibodies. The proportion of antibody positive dogs was compared between groups by Fisher's exact test. RESULTS Four diabetic (16.6%) and no control dogs were anti-insulin antibody positive. CLINICAL SIGNIFICANCE These results indicate that treatment with recombinant human insulin may induce anti-insulin antibodies in dogs, although this finding needs to be re-investigated in a larger study to investigate the impact of anti-insulin antibodies on glycaemic control.
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Affiliation(s)
- M Lester
- Small Animal Hospital, College of Veterinary Medicine, University of Florida, Gainesville, Florida, 32608, USA
| | - A L O'Kell
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, 32608, USA
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Adami C, Hayes RS, Sanchez RF, Monticelli P. Effect of Insulin and Fasting Regimen on Blood Glucose Concentrations of Diabetic Dogs During Phacoemulsification. J Am Anim Hosp Assoc 2019; 56:1-6. [PMID: 31715116 DOI: 10.5326/jaaha-ms-6884] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study aimed to compare four protocols for preanesthetic insulin administration and fasting time with respect to the variation of intraoperative blood glucose (BG) concentrations versus preanesthetic values (baseline). The patient records of dogs undergoing cataract surgery were included. Data on anesthetic protocols, comorbidities, and intraoperative complications (hyper- and hypoglycemia, hypotension, hypothermia, and bradycardia) were analyzed. The insulin/fasting protocols included (A) 12 hr fasting and half insulin dose, (B) 6 hr fasting and half insulin dose, (C) 12 hr fasting and full insulin dose, and (D) 12 hr fasting and no insulin. Forty-eight dogs were included (14 in A, 10 in B, 13 in C, and 11 in D). Protocol D resulted in a significant increase of intraoperative BG concentrations compared with baseline (P = .001), whereas in the remaining groups, the baseline BG did not differ from intraoperative values. There were no statistically significant associations between the treatment group and the occurrence of intraoperative complications or the presence of diagnosed comorbidities. In conclusion, different insulin and fasting regimen protocols may be used for diabetic patients with no apparent benefit or risk from one protocol versus another. The use of insulin before surgery results in lesser increase of BG intraoperatively as compared with preanesthetic values. However, whether this should be interpreted as better perioperative control of glycemia remains debatable.
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Affiliation(s)
- Chiara Adami
- From the Department of Clinical Science and Services, Royal Veterinary College, University of London, London, United Kingdom (C.A., R.S.H., P.M.); and Specialistische Dierenkliniek Utrecht (SDU), Utrecht, The Netherlands (R.F.S.)
| | - Robert Shane Hayes
- From the Department of Clinical Science and Services, Royal Veterinary College, University of London, London, United Kingdom (C.A., R.S.H., P.M.); and Specialistische Dierenkliniek Utrecht (SDU), Utrecht, The Netherlands (R.F.S.)
| | - Rick F Sanchez
- From the Department of Clinical Science and Services, Royal Veterinary College, University of London, London, United Kingdom (C.A., R.S.H., P.M.); and Specialistische Dierenkliniek Utrecht (SDU), Utrecht, The Netherlands (R.F.S.)
| | - Paolo Monticelli
- From the Department of Clinical Science and Services, Royal Veterinary College, University of London, London, United Kingdom (C.A., R.S.H., P.M.); and Specialistische Dierenkliniek Utrecht (SDU), Utrecht, The Netherlands (R.F.S.)
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Tardo AM, Del Baldo F, Dondi F, Pietra M, Chiocchetti R, Fracassi F. Survival estimates and outcome predictors in dogs with newly diagnosed diabetes mellitus treated in a veterinary teaching hospital. Vet Rec 2019; 185:692. [PMID: 31582571 DOI: 10.1136/vr.105227] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 07/23/2019] [Accepted: 09/18/2019] [Indexed: 12/30/2022]
Abstract
BACKGROUND Diabetes mellitus (DM) is one of the most common endocrine disorders in dogs, but prognostic factors are still largely unknown. The aim of this retrospective, single-centre, case series study was to determine overall survival time and identify the prognostic value of several clinical and clinicopathological variables in dogs with newly diagnosed DM. METHODS Cases of DM were identified within the electronic medical records of one referral centre. Sixty-eight dogs with DM were included. Cox proportional hazards models were used to analyse variables associated with survival. RESULTS The median survival time was 964 days (range 22-3140). In multivariable model analysis, length of survival was significantly shorter for dogs with higher haematocrit value (hazard ratio (HR) 1.06, 95 per cent confidence interval (CI) 1.00 to 1.13) and higher serum phosphate concentrations (HR 1.83, 95 per cent CI 1.13 to 2.97). Serum phosphate concentrations were above the reference interval in 24 of 65 (37 per cent) dogs. CONCLUSION Diabetic dogs have a good life expectancy. Hyperphosphataemia is a relatively common finding in dogs with newly diagnosed DM and represents a negative prognostic factor. The presence of pancreatitis might not be associated with an unfavourable outcome.
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Affiliation(s)
- Antonio Maria Tardo
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia, Italy
| | - Francesca Del Baldo
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia, Italy
| | - Francesco Dondi
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia, Italy
| | - Marco Pietra
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia, Italy
| | - Roberto Chiocchetti
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia, Italy
| | - Federico Fracassi
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia, Italy
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Cartwright JA, Cobb M, Dunning MD. Pilot study evaluating the monitoring of canine diabetes mellitus in primary care practice. Vet Rec Open 2019; 6:e000250. [PMID: 31205722 PMCID: PMC6541103 DOI: 10.1136/vetreco-2017-000250] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 12/24/2018] [Accepted: 01/11/2019] [Indexed: 01/28/2023] Open
Abstract
Objectives This study aimed to describe how canine diabetes mellitus (CDM) is monitored in primary care practice (PCP) and to report outcomes. Design Retrospective case review. Setting PCP. Participants 40 dogs of 22 different pedigrees and five crossbreeds. Median age at diagnosis was nine years and six months (eight years six months to 10 years five months). Dogs were diagnosed with CDM between January 1, 2008 and December 30, 2012 and remained with the practice to the study end or until death. Primary and secondary outcome measures Stability achievement and death or euthanasia. Consultations for each dog were identified and recorded through records collected from the PCP (January 1, 2008 to December 30, 2012). Results A median of three consultations per dog occurred in the first month, subsequently falling to a median of one consultation every 19 days thereafter. After the first month postdiagnosis, weight and single blood glucose concentrations were most frequently recorded at 66.8 and 42 per cent of consultations respectively and a blood glucose curve was performed infrequently (17.4 per cent). Serum biochemistry was measured at 8 per cent of consultations and urine culture at only 0.8 per cent. Median survival time (MST) for all dogs was eight months (2–21 months). Eighteen dogs stabilised within three months of diagnosis and their MST was 20.5 months, (10.25–25.75 months), significantly longer than the 22 dogs not achieving stability within three months (MST 2.5 months, 0–5.5 months) (P<0.001). Those dogs not surviving beyond the first month had significantly fewer consultations than those still alive (P<0.005). Conclusions This pilot study indicates dogs with CDM managed solely in PCP experience limited monitoring tests and have lower MST than reported in the literature. Recruitment of a larger cohort of CDM cases from a larger number of PCP will help determine whether these results accurately represent this demographic and verify if infrequent testing is associated with a poor outcome. Importantly, prospective evaluation of decision-making around monitoring CDM in PCP is required, to help determine the effectiveness and feasibility of more frequent monitoring strategies, such as those recommended by the American Animal Hospital Association, particularly to influence MST.
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Affiliation(s)
| | - Malcolm Cobb
- School of Veterinary Medicine, University of Nottingham, Loughborough, UK
| | - Mark D Dunning
- School of Veterinary Medicine and Science, University of Nottingham, Loughborough, UK
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Kim NY, An J, Jeong JK, Ji S, Hwang SH, Lee HS, Kim MC, Kim HW, Won S, Kim Y. Evaluation of a human glycated hemoglobin test in canine diabetes mellitus. J Vet Diagn Invest 2019; 31:408-414. [PMID: 30776981 PMCID: PMC6838714 DOI: 10.1177/1040638719832071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
Glycated hemoglobin A1c (HbA1c) is widely used for monitoring and diagnosing human diabetes mellitus, but is rarely used in veterinary clinics. The goal of our study was to validate the commercial HbA1c testing system SD A1cCare analyzer (Bionote, Gyeoggi-do, South Korea) for use in dogs. Dogs were recruited with owner's consent. Diabetic status was determined based on clinical signs, fasting hyperglycemia, and glycosuria. Intra-assay precision and linearity were evaluated with EDTA, heparin, or citrate as anticoagulants, and had excellent precision with mean coefficients of variation (CVs) of 2.47%, 2.26%, and 1.92%, respectively. Diluted anticoagulated blood samples showed excellent linear relationships with R2 of 0.991, 0.996, and 0.994, respectively. Inter-assay precision revealed that the mean CV of the normal control was 2.18% and that of the high control was 2.01% (30 repeats). Observed total error of a normal control was 7.81%, and 6.12% for the high control. HbA1c level measured before and after removal of plasma and replacement by saline showed minimal interference by lipid contents ( p = 0.929). The HbA1c concentrations of diabetic dogs were significantly higher than those of non-diabetic dogs ( p < 0.001). HbA1c value >6.2% indicated canine diabetes through a classification and regression tree model. In most cases, fructosamine and HbA1c were highly correlated ( r = 0.674, p < 0.001). The HbA1c testing system could be a valuable testing system to evaluate canine diabetes mellitus, providing an alternative in-house option for use by veterinary clinicians.
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Affiliation(s)
- Na-Yon Kim
- Laboratory of Clinical Pathology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine (NY Kim, Y Kim, MC Kim, Ji, Hwang, Lee)
- Department of Public Health Science, Graduate School of Public Health (An, Won)
- Seoul National University, Seoul, The Republic of Korea; Department of Chemistry, Princeton University, Princeton, NJ (Jeong)
- Haemaru Referral Animal Hospital, Hwangsaeul-ro, Bundang-gu, Seongnam City, Gyeongi-do, The Republic of Korea (HW Kim)
| | - Jaehoon An
- Laboratory of Clinical Pathology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine (NY Kim, Y Kim, MC Kim, Ji, Hwang, Lee)
- Department of Public Health Science, Graduate School of Public Health (An, Won)
- Seoul National University, Seoul, The Republic of Korea; Department of Chemistry, Princeton University, Princeton, NJ (Jeong)
- Haemaru Referral Animal Hospital, Hwangsaeul-ro, Bundang-gu, Seongnam City, Gyeongi-do, The Republic of Korea (HW Kim)
| | - Jae-Kyung Jeong
- Laboratory of Clinical Pathology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine (NY Kim, Y Kim, MC Kim, Ji, Hwang, Lee)
- Department of Public Health Science, Graduate School of Public Health (An, Won)
- Seoul National University, Seoul, The Republic of Korea; Department of Chemistry, Princeton University, Princeton, NJ (Jeong)
- Haemaru Referral Animal Hospital, Hwangsaeul-ro, Bundang-gu, Seongnam City, Gyeongi-do, The Republic of Korea (HW Kim)
| | - Sumin Ji
- Laboratory of Clinical Pathology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine (NY Kim, Y Kim, MC Kim, Ji, Hwang, Lee)
- Department of Public Health Science, Graduate School of Public Health (An, Won)
- Seoul National University, Seoul, The Republic of Korea; Department of Chemistry, Princeton University, Princeton, NJ (Jeong)
- Haemaru Referral Animal Hospital, Hwangsaeul-ro, Bundang-gu, Seongnam City, Gyeongi-do, The Republic of Korea (HW Kim)
| | - Sung-Hyun Hwang
- Laboratory of Clinical Pathology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine (NY Kim, Y Kim, MC Kim, Ji, Hwang, Lee)
- Department of Public Health Science, Graduate School of Public Health (An, Won)
- Seoul National University, Seoul, The Republic of Korea; Department of Chemistry, Princeton University, Princeton, NJ (Jeong)
- Haemaru Referral Animal Hospital, Hwangsaeul-ro, Bundang-gu, Seongnam City, Gyeongi-do, The Republic of Korea (HW Kim)
| | - Hong-Seok Lee
- Laboratory of Clinical Pathology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine (NY Kim, Y Kim, MC Kim, Ji, Hwang, Lee)
- Department of Public Health Science, Graduate School of Public Health (An, Won)
- Seoul National University, Seoul, The Republic of Korea; Department of Chemistry, Princeton University, Princeton, NJ (Jeong)
- Haemaru Referral Animal Hospital, Hwangsaeul-ro, Bundang-gu, Seongnam City, Gyeongi-do, The Republic of Korea (HW Kim)
| | - Myung-Chul Kim
- Laboratory of Clinical Pathology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine (NY Kim, Y Kim, MC Kim, Ji, Hwang, Lee)
- Department of Public Health Science, Graduate School of Public Health (An, Won)
- Seoul National University, Seoul, The Republic of Korea; Department of Chemistry, Princeton University, Princeton, NJ (Jeong)
- Haemaru Referral Animal Hospital, Hwangsaeul-ro, Bundang-gu, Seongnam City, Gyeongi-do, The Republic of Korea (HW Kim)
| | - Hyun-Wook Kim
- Laboratory of Clinical Pathology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine (NY Kim, Y Kim, MC Kim, Ji, Hwang, Lee)
- Department of Public Health Science, Graduate School of Public Health (An, Won)
- Seoul National University, Seoul, The Republic of Korea; Department of Chemistry, Princeton University, Princeton, NJ (Jeong)
- Haemaru Referral Animal Hospital, Hwangsaeul-ro, Bundang-gu, Seongnam City, Gyeongi-do, The Republic of Korea (HW Kim)
| | - Sungho Won
- Laboratory of Clinical Pathology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine (NY Kim, Y Kim, MC Kim, Ji, Hwang, Lee)
- Department of Public Health Science, Graduate School of Public Health (An, Won)
- Seoul National University, Seoul, The Republic of Korea; Department of Chemistry, Princeton University, Princeton, NJ (Jeong)
- Haemaru Referral Animal Hospital, Hwangsaeul-ro, Bundang-gu, Seongnam City, Gyeongi-do, The Republic of Korea (HW Kim)
| | - Yongbaek Kim
- Laboratory of Clinical Pathology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine (NY Kim, Y Kim, MC Kim, Ji, Hwang, Lee)
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Violette NP, Ledbetter EC. Lipemic uveitis and its etiologies in dogs: 75 cases. Vet Ophthalmol 2019; 22:577-583. [PMID: 30716194 DOI: 10.1111/vop.12625] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/04/2018] [Accepted: 10/23/2018] [Indexed: 01/21/2023]
Abstract
OBJECTIVE To describe clinical features of dogs with lipemic uveitis (LU). ANIMALS STUDIED Seventy-five dogs (114 eyes) with LU. PROCEDURES Medical records of dogs examined by the Cornell University ophthalmology service with a clinical diagnosis of LU between 2008 and 2017 were analyzed. Signalment and clinical case aspects, including concurrent ocular disease, systemic disease, and previous ophthalmic surgery, were recorded. RESULTS Lipemic uveitis was diagnosed in 114 eyes of 75 dogs. The mean (±standard deviation) age of dogs was 9.0 years (±2.7 years). Miniature Schnauzers and Yorkshire Terriers were statistically overrepresented compared to the ophthalmology canine referral population. Lipemic flare varied in severity with loss of menace response due to markedly opaque flare seen in 15/114 eyes (13%). Two dogs developed LU after dietary indiscretion. Forty-nine eyes (43%) had concurrent ocular disease, most commonly keratoconjunctivitis sicca, ulcerative keratitis, and cataracts. Pseudophakia was present in 75/114 eyes (66%) and LU developed within 30 days of an intraocular surgical procedure in 63/114 eyes (55%). Hypertriglyceridemia was noted in 52 dogs of the 55 dogs tested (95%). Systemic disease affected 54/75 dogs (72%), of which diabetes mellitus, hyperadrenocorticism, and hypothyroidism were overrepresented compared to the referral population. Primary hyperlipidemia was identified in 12 dogs. Lipemic uveitis resolved at first reevaluation in 92/110 eyes (84%) and recurred in 6/114 eyes (5%) after complete resolution. CONCLUSIONS Development of lipemic uveitis in dogs appears to require the combination of hyperlipidemia and uveitis. Systemic disease is commonly associated with LU in dogs.
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Affiliation(s)
- Nathaniel P Violette
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York
| | - Eric C Ledbetter
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York
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Fracassi F, Linari G, Del Baldo F, Di Cunzolo A, D'Angelo S, Malerba E, Carotenuto G, Bonfanti U, Corradini S. Comparison of lente insulin and NPH insulin therapy for the treatment of newly diagnosed diabetic dogs: a randomised study. Vet Rec 2018; 183:262. [DOI: 10.1136/vr.104818] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 05/18/2018] [Accepted: 07/01/2018] [Indexed: 11/04/2022]
Affiliation(s)
- Federico Fracassi
- Department of Veterinary Medical Sciences; University of Bologna; Bologna Italy
- Clinica Veterinaria Vetlan; Battipaglia Italy
- Laboratorio analisi La Vallonea; Passirana di Rho Italy
| | - Guido Linari
- Department of Veterinary Medical Sciences; University of Bologna; Bologna Italy
- Clinica Veterinaria Vetlan; Battipaglia Italy
- Laboratorio analisi La Vallonea; Passirana di Rho Italy
| | - Francesca Del Baldo
- Department of Veterinary Medical Sciences; University of Bologna; Bologna Italy
- Clinica Veterinaria Vetlan; Battipaglia Italy
- Laboratorio analisi La Vallonea; Passirana di Rho Italy
| | - Antonella Di Cunzolo
- Department of Veterinary Medical Sciences; University of Bologna; Bologna Italy
- Clinica Veterinaria Vetlan; Battipaglia Italy
- Laboratorio analisi La Vallonea; Passirana di Rho Italy
| | - Simona D'Angelo
- Department of Veterinary Medical Sciences; University of Bologna; Bologna Italy
- Clinica Veterinaria Vetlan; Battipaglia Italy
- Laboratorio analisi La Vallonea; Passirana di Rho Italy
| | - Eleonora Malerba
- Department of Veterinary Medical Sciences; University of Bologna; Bologna Italy
- Clinica Veterinaria Vetlan; Battipaglia Italy
- Laboratorio analisi La Vallonea; Passirana di Rho Italy
| | - Gaia Carotenuto
- Department of Veterinary Medical Sciences; University of Bologna; Bologna Italy
- Clinica Veterinaria Vetlan; Battipaglia Italy
- Laboratorio analisi La Vallonea; Passirana di Rho Italy
| | - Ugo Bonfanti
- Department of Veterinary Medical Sciences; University of Bologna; Bologna Italy
- Clinica Veterinaria Vetlan; Battipaglia Italy
- Laboratorio analisi La Vallonea; Passirana di Rho Italy
| | - Sara Corradini
- Department of Veterinary Medical Sciences; University of Bologna; Bologna Italy
- Clinica Veterinaria Vetlan; Battipaglia Italy
- Laboratorio analisi La Vallonea; Passirana di Rho Italy
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O'Kell AL, Wasserfall C, Catchpole B, Davison LJ, Hess RS, Kushner JA, Atkinson MA. Comparative Pathogenesis of Autoimmune Diabetes in Humans, NOD Mice, and Canines: Has a Valuable Animal Model of Type 1 Diabetes Been Overlooked? Diabetes 2017; 66:1443-1452. [PMID: 28533295 PMCID: PMC5440022 DOI: 10.2337/db16-1551] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 03/15/2017] [Indexed: 12/13/2022]
Abstract
Despite decades of research in humans and mouse models of disease, substantial gaps remain in our understanding of pathogenic mechanisms underlying the development of type 1 diabetes. Furthermore, translation of therapies from preclinical efforts capable of delaying or halting β-cell destruction has been limited. Hence, a pressing need exists to identify alternative animal models that reflect human disease. Canine insulin deficiency diabetes is, in some cases, considered to follow autoimmune pathogenesis, similar to NOD mice and humans, characterized by hyperglycemia requiring lifelong exogenous insulin therapy. Also similar to human type 1 diabetes, the canonical canine disorder appears to be increasing in prevalence. Whereas islet architecture in rodents is distinctly different from humans, canine pancreatic endocrine cell distribution is more similar. Differences in breed susceptibility alongside associations with MHC and other canine immune response genes parallel that of different ethnic groups within the human population, a potential benefit over NOD mice. The impact of environment on disease development also favors canine over rodent models. Herein, we consider the potential for canine diabetes to provide valuable insights for human type 1 diabetes in terms of pancreatic histopathology, impairment of β-cell function and mass, islet inflammation (i.e., insulitis), and autoantibodies specific for β-cell antigens.
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Affiliation(s)
- Allison L O'Kell
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Clive Wasserfall
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
| | - Brian Catchpole
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hatfield, U.K
| | - Lucy J Davison
- Department of Veterinary Medicine, University of Cambridge, Cambridge, U.K., and Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, U.K
| | - Rebecka S Hess
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA
| | - Jake A Kushner
- McNair Medical Institute and Department of Pediatric Diabetes and Endocrinology, Baylor College of Medicine, Texas Children's Hospital, Houston, TX
| | - Mark A Atkinson
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
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Goemans AF, Spence SJ, Ramsey IK. Validation and determination of a reference interval for canine HbA1c using an immunoturbidimetric assay. Vet Clin Pathol 2017; 46:227-237. [DOI: 10.1111/vcp.12477] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Ian K. Ramsey
- Small Animal Hospital; University of Glasgow; Glasgow UK
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31
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Jaén ML, Vilà L, Elias I, Jimenez V, Rodó J, Maggioni L, Ruiz-de Gopegui R, Garcia M, Muñoz S, Callejas D, Ayuso E, Ferré T, Grifoll I, Andaluz A, Ruberte J, Haurigot V, Bosch F. Long-Term Efficacy and Safety of Insulin and Glucokinase Gene Therapy for Diabetes: 8-Year Follow-Up in Dogs. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2017. [PMID: 28626777 PMCID: PMC5466581 DOI: 10.1016/j.omtm.2017.03.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Diabetes is a complex metabolic disease that exposes patients to the deleterious effects of hyperglycemia on various organs. Achievement of normoglycemia with exogenous insulin treatment requires the use of high doses of hormone, which increases the risk of life-threatening hypoglycemic episodes. We developed a gene therapy approach to control diabetic hyperglycemia based on co-expression of the insulin and glucokinase genes in skeletal muscle. Previous studies proved the feasibility of gene delivery to large diabetic animals with adeno-associated viral (AAV) vectors. Here, we report the long-term (∼8 years) follow-up after a single administration of therapeutic vectors to diabetic dogs. Successful, multi-year control of glycemia was achieved without the need of supplementation with exogenous insulin. Metabolic correction was demonstrated through normalization of serum levels of fructosamine, triglycerides, and cholesterol and remarkable improvement in the response to an oral glucose challenge. The persistence of vector genomes and therapeutic transgene expression years after vector delivery was documented in multiple samples from treated muscles, which showed normal morphology. Thus, this study demonstrates the long-term efficacy and safety of insulin and glucokinase gene transfer in large animals and especially the ability of the system to respond to the changes in metabolic needs as animals grow older.
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Affiliation(s)
- Maria Luisa Jaén
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Laia Vilà
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Ivet Elias
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Veronica Jimenez
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Jordi Rodó
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Luca Maggioni
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Rafael Ruiz-de Gopegui
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Miguel Garcia
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Sergio Muñoz
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - David Callejas
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Eduard Ayuso
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Tura Ferré
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Iris Grifoll
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Anna Andaluz
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Jesus Ruberte
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Animal Health and Anatomy, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Virginia Haurigot
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
| | - Fatima Bosch
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, 28029 Madrid, Spain
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Davison LJ, Holder A, Catchpole B, O'Callaghan CA. The Canine POMC Gene, Obesity in Labrador Retrievers and Susceptibility to Diabetes Mellitus. J Vet Intern Med 2017; 31:343-348. [PMID: 28176381 PMCID: PMC5354034 DOI: 10.1111/jvim.14636] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 09/21/2016] [Accepted: 11/16/2016] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Diabetes mellitus (DM) in dogs is a common endocrinopathy with a complex genetic architecture. Disease susceptibility in several breeds is associated with polymorphisms in immune response genes, but in the Labrador retriever breed, no genetic associations with DM have been identified. A deletion in the pro-opiomelanocortin (POMC) gene in Labrador retrievers is associated with increased appetite and risk of obesity. HYPOTHESIS/OBJECTIVES To characterize the POMC deletion in Labrador retrievers, to develop a simple genetic test for this mutation, and to test the hypothesis that the POMC gene deletion is associated with an increased risk of DM in this breed. ANIMALS Sixty-one non-diabetic Labrador retrievers aged >6 years and 57 Labrador retrievers with DM. METHODS Case-control genotyping study to compare the frequency of the POMC deletion in dogs with and without DM. After polymerase chain reaction (PCR) and sequencing to characterize the mutation, a PCR-based test was developed and validated using 2 different restriction fragment length polymorphism assays. RESULTS A 14-base-pair deletion was confirmed and localized to exon 3 of the canine POMC gene. A PCR-based test for the deletion was successfully developed. There was no association between the presence of the POMC deletion mutation and DM in this population of Labrador retriever dogs (P = .31). CONCLUSIONS AND CLINICAL IMPORTANCE This study adds to the existing scientific literature indicating that there is little evidence for a direct link between obesity and DM in dogs.
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Affiliation(s)
- L J Davison
- Department of Veterinary Medicine, Queen's Veterinary School Hospital, University of Cambridge, Cambridge, UK.,Nuffield Department of Medicine, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
| | - A Holder
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hatfield, UK
| | - B Catchpole
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hatfield, UK
| | - C A O'Callaghan
- Nuffield Department of Medicine, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
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33
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Study of the pathogenesis and treatment of diabetes mellitus through animal models. ACTA ACUST UNITED AC 2016; 63:345-53. [PMID: 27246633 DOI: 10.1016/j.endonu.2016.03.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 03/30/2016] [Accepted: 03/31/2016] [Indexed: 12/16/2022]
Abstract
Most research in diabetes mellitus (DM) has been conducted in animals, and their replacement is currently a chimera. As compared to when they started to be used by modern science in the 17th century, a very high number of animal models of diabetes is now available, and they provide new insights into almost every aspect of diabetes. Approaches combining human, in vitro, and animal studies are probably the best strategy to improve our understanding of the underlying mechanisms of diabetes, and the choice of the best model to achieve such objective is crucial. Traditionally classified based on pathogenesis as spontaneous or induced models, each has its own advantages and disadvantages. The most common animal models of diabetes are described, and in addition to non-obese diabetic mice, biobreeding diabetes-prone (BB-DP) rats, streptozotocin-induced models, or high-fat diet-induced diabetic C57Bl/6J mice, new valuable models, such as dogs and cats with spontaneous diabetes, are described.
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Beltrame OC, Locatelli-Dittrich R, Laskoski LM, Patricio LFL, Medeiros NDC, Koch MO. HEMOGLOBINA GLICADA E FRUTOSAMINA EM CÃES COM DIABETES MELLITUS. CIÊNCIA ANIMAL BRASILEIRA 2015. [DOI: 10.1590/1089-6891v16i427635] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Resumo O Diabetes mellitus (DM) ocorre com frequência em cães, sendo a glicemia o teste laboratorial de confirmação. O diagnóstico e monitoramento em pessoas são realizados pelas concentrações de hemoglobina glicada e frutosamina. O objetivo deste estudo foi diagnosticar a DM em 19 cães, com avaliação das concentrações da glicose sérica, hemoglobina glicada e frutosamina. Seis cães com DM e em tratamento com insulina foram acompanhados por um período de doze meses, com as mesmas avaliações hematológicas, até o óbito (três cães) ou controle glicêmico (três cães). Observouse aumento dos valores de glicose, hemoglobina glicada e frutosamina em todos os cães com DM, e valores de hemoglobina glicada e glicose superiores nos animais não sobreviventes, na última avaliação realizada. Estes resultados apontam para a importância da avaliação de hemoglobina glicada e frutosamina em cães com diabetes e para diagnóstico e controle da efetividade do tratamento.
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Lee S, Jang IJ, Yang W, Koo M, Cha JW, Yoon J, Lee KM, Lee JI. Reevaluation of spontaneous and frequently diagnosed disease in companion animals and its application in tissue engineering and regenerative medicine. Tissue Eng Regen Med 2015. [DOI: 10.1007/s13770-015-0436-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Holder AL, Kennedy LJ, Ollier WER, Catchpole B. Breed differences in development of anti-insulin antibodies in diabetic dogs and investigation of the role of dog leukocyte antigen (DLA) genes. Vet Immunol Immunopathol 2015; 167:130-8. [PMID: 26272177 DOI: 10.1016/j.vetimm.2015.07.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 07/01/2015] [Accepted: 07/30/2015] [Indexed: 10/23/2022]
Abstract
Administration of insulin for treatment of diabetes mellitus in dogs can stimulate an immune response, with a proportion of animals developing anti-insulin antibodies (AIA). For an IgG antibody response to occur, this would require B cell presentation of insulin peptides by major histocompatibility complex (MHC) class II molecules, encoded by dog leukocyte antigen (DLA) genes, in order to receive T-cell help for class switching. DLA genes are highly polymorphic in the dog population and vary from breed to breed. The aim of the present study was to evaluate AIA reactivity in diabetic dogs of different breeds and to investigate whether DLA genes influence AIA status. Indirect ELISA was used to determine serological reactivity to insulin in diabetic dogs, treated with either a porcine or bovine insulin preparation. DLA haplotypes for diabetic dogs were determined by sequence-based typing of DLA-DRB1, -DQA1 and -DQB1 loci. Significantly greater insulin reactivity was seen in treated diabetic dogs (n=942) compared with non-diabetic dogs (n=100). Relatively few newly diagnosed diabetic dogs (3/109) were found to be AIA positive, although this provides evidence that insulin autoantibodies might be involved in the pathogenesis of the disease in some cases. Of the diabetic dogs treated with a bovine insulin preparation, 52.3% (182/348) were AIA positive, compared with 12.6% (75/594) of dogs treated with a porcine insulin preparation, suggesting that bovine insulin is more immunogenic. Breeds such as dachshund, Cairn terrier, miniature schnauzer and Tibetan terrier were more likely to develop AIA, whereas cocker spaniels were less likely to develop AIA, compared with crossbreed dogs. In diabetic dogs, DLA haplotype DRB1*0015--DQA1*006--DQB1*023 was associated with being AIA positive, whereas the haplotype DLA-DRB1*006--DQA1*005--DQB1*007 showed an association with being AIA negative. These research findings suggest that DLA genes influence AIA responses in treated diabetic dogs.
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Affiliation(s)
- Angela L Holder
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA, UK
| | - Lorna J Kennedy
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK
| | - William E R Ollier
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK
| | - Brian Catchpole
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA, UK.
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Fracassi F, Corradini S, Hafner M, Boretti FS, Sieber-Ruckstuhl NS, Reusch CE. Detemir insulin for the treatment of diabetes mellitus in dogs. J Am Vet Med Assoc 2015; 247:73-8. [DOI: 10.2460/javma.247.1.73] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Extreme Beta-Cell Deficiency in Pancreata of Dogs with Canine Diabetes. PLoS One 2015; 10:e0129809. [PMID: 26057531 PMCID: PMC4461304 DOI: 10.1371/journal.pone.0129809] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 05/13/2015] [Indexed: 01/25/2023] Open
Abstract
The pathophysiology of canine diabetes remains poorly understood, in part due to enigmatic clinical features and the lack of detailed histopathology studies. Canine diabetes, similar to human type 1 diabetes, is frequently associated with diabetic ketoacidosis at onset or after insulin omission. However, notable differences exist. Whereas human type 1 diabetes often occurs in children, canine diabetes is typically described in middle age to elderly dogs. Many competing theories have been proposed regarding the underlying cause of canine diabetes, from pancreatic atrophy to chronic pancreatitis to autoimmune mediated β-cell destruction. It remains unclear to what extent β-cell loss contributes to canine diabetes, as precise quantifications of islet morphometry have not been performed. We used high-throughput microscopy and automated image processing to characterize islet histology in a large collection of pancreata of diabetic dogs. Diabetic pancreata displayed a profound reduction in β-cells and islet endocrine cells. Unlike humans, canine non-diabetic islets are largely comprised of β-cells. Very few β-cells remained in islets of diabetic dogs, even in pancreata from new onset cases. Similarly, total islet endocrine cell number was sharply reduced in diabetic dogs. No compensatory proliferation or lymphocyte infiltration was detected. The majority of pancreata had no evidence of pancreatitis. Thus, canine diabetes is associated with extreme β-cell deficiency in both new and longstanding disease. The β-cell predominant composition of canine islets and the near-total absence of β-cells in new onset elderly diabetic dogs strongly implies that similar to human type 1 diabetes, β-cell loss underlies the pathophysiology of canine diabetes.
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Davison LJ. Diabetes mellitus and pancreatitis - cause or effect? J Small Anim Pract 2015; 56:50-9. [DOI: 10.1111/jsap.12295] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 07/30/2014] [Accepted: 08/02/2014] [Indexed: 02/06/2023]
Affiliation(s)
- L. J. Davison
- Department of Veterinary Medicine, University of Cambridge, Cambridge CB3 0ES and Wellcome Trust Centre for Human Genetics; University of Oxford; Oxford OX3 7BN
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40
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Gemensky-Metzler AJ, Sheahan JE, Rajala-Schultz PJ, Wilkie DA, Harrington J. Retrospective study of the prevalence of keratoconjunctivitis sicca in diabetic and nondiabetic dogs after phacoemulsification. Vet Ophthalmol 2014; 18:472-80. [DOI: 10.1111/vop.12238] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Anne J. Gemensky-Metzler
- The Ohio State University College of Veterinary Medicine; 601 Vernon L. Tharp St. Columbus OH 43210 USA
| | | | - Paivi J. Rajala-Schultz
- The Ohio State University College of Veterinary Medicine; 601 Vernon L. Tharp St. Columbus OH 43210 USA
| | - David A. Wilkie
- The Ohio State University College of Veterinary Medicine; 601 Vernon L. Tharp St. Columbus OH 43210 USA
| | - Jay Harrington
- Veterinary Emergency and Referral Group; 318 Warren St. Brooklyn NY 27320 USA
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Aptekmann KP, Armstrong J, Coradini M, Rand J. Owner Experiences in Treating Dogs and Cats Diagnosed With Diabetes Mellitus in the United StatesS. J Am Anim Hosp Assoc 2014; 50:247-53. [DOI: 10.5326/jaaha-ms-6101] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The objective of this study was to report owner experiences and satisfaction in treating a pet with diabetes mellitus using a descriptive report from an Internet-based survey. Descriptive analysis of results was performed, χ2 tests were used to detect differences in responses between dog and cat owners, and correlations were assessed using the nonparametric Spearman rank correlation. A total of 834 owners participated in the survey. More diabetic dogs (97%) than cats (82%) were treated with insulin injections. Insulin was administered twice daily in 87% of dogs and 73% of cats. Porcine lente and neutral protamine Hagedorn were the most commonly administered insulins in dogs. In cats, glargine and protamine zinc insulin were the most commonly used insulins. Most pets were not fed a prescribed diabetes diet. More cat (66%) than dog (50%) owners were satisfied with the diabetic control achieved. Cat owners were more likely to use home blood glucose monitoring. Treatment was considered expensive by the majority of owners. Few published reports follow diabetic pets after diagnosis or report owner satisfaction. The results of this study provide useful information that may help veterinarians better educate owners and set expectations regarding diabetes treatment and quality of life for diabetic pets.
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Affiliation(s)
- Karina P. Aptekmann
- Departamento de Medicina Veterinária, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, Espírito Santo, Brazil (K.A.); Veterinary Clinical Sciences Department, College of Veterinary Medicine, University of Minnesota, St. Paul, MN (J.A.); and Centre for Companion Animal Health, School of Veterinary Medicine, The University of Queensland, Brisbane, Australia (M.C., J.R.)
| | - Jane Armstrong
- Departamento de Medicina Veterinária, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, Espírito Santo, Brazil (K.A.); Veterinary Clinical Sciences Department, College of Veterinary Medicine, University of Minnesota, St. Paul, MN (J.A.); and Centre for Companion Animal Health, School of Veterinary Medicine, The University of Queensland, Brisbane, Australia (M.C., J.R.)
| | - Marcia Coradini
- Departamento de Medicina Veterinária, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, Espírito Santo, Brazil (K.A.); Veterinary Clinical Sciences Department, College of Veterinary Medicine, University of Minnesota, St. Paul, MN (J.A.); and Centre for Companion Animal Health, School of Veterinary Medicine, The University of Queensland, Brisbane, Australia (M.C., J.R.)
| | - Jacquie Rand
- Departamento de Medicina Veterinária, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, Espírito Santo, Brazil (K.A.); Veterinary Clinical Sciences Department, College of Veterinary Medicine, University of Minnesota, St. Paul, MN (J.A.); and Centre for Companion Animal Health, School of Veterinary Medicine, The University of Queensland, Brisbane, Australia (M.C., J.R.)
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Short AD, Holder A, Rothwell S, Massey J, Scholey R, Kennedy LJ, Catchpole B, Ollier WE. Searching for "monogenic diabetes" in dogs using a candidate gene approach. Canine Genet Epidemiol 2014; 1:8. [PMID: 26401325 PMCID: PMC4579387 DOI: 10.1186/2052-6687-1-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 06/23/2014] [Indexed: 11/24/2022] Open
Abstract
Background Canine diabetes is a common endocrine disorder with an estimated breed-related prevalence ranging from 0.005% to 1.5% in pet dogs. Increased prevalence in some breeds suggests that diabetes in dogs is influenced by genetic factors and similarities between canine and human diabetes phenotypes suggest that the same genes might be associated with disease susceptibility in both species. Between 1-5% of human diabetes cases result from mutations in a single gene, including maturity onset diabetes of the adult (MODY) and neonatal diabetes mellitus (NDM). It is not clear whether monogenic forms of diabetes exist within some dog breeds. Identification of forms of canine monogenic diabetes could help to resolve the heterogeneity of the condition and lead to development of breed-specific genetic tests for diabetes susceptibility. Results Seventeen dog breeds were screened for single nucleotide polymorphisms (SNPs) in eighteen genes that have been associated with human MODY/NDM. Six SNP associations were found from five genes, with one gene (ZFP57) being associated in two different breeds. Conclusions Some of the genes that have been associated with susceptibility to MODY and NDM in humans appear to also be associated with canine diabetes, although the limited number of associations identified in this study indicates canine diabetes is a heterogeneous condition and is most likely to be a polygenic trait in most dog breeds. Electronic supplementary material The online version of this article (doi:10.1186/2052-6687-1-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Andrea D Short
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT UK
| | - Angela Holder
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA UK
| | - Simon Rothwell
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT UK
| | - Jonathan Massey
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT UK
| | - Rachel Scholey
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT UK
| | - Lorna J Kennedy
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT UK
| | - Brian Catchpole
- Department of Pathology and Pathogen Biology, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA UK
| | - William Er Ollier
- Centre for Integrated Genomic Medical Research, University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT UK
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43
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Mattin M, O'Neill D, Church D, McGreevy PD, Thomson PC, Brodbelt D. An epidemiological study of diabetes mellitus in dogs attending first opinion practice in the UK. Vet Rec 2014; 174:349. [DOI: 10.1136/vr.101950] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- M. Mattin
- Department of Production and Population Health; The Royal Veterinary College; Hawkshead Lane, North Mymms Hatfield Herts AL9 7TA UK
| | - D. O'Neill
- Department of Production and Population Health; The Royal Veterinary College; Hawkshead Lane, North Mymms Hatfield Herts AL9 7TA UK
| | - D. Church
- Department of Veterinary Clinical Sciences; The Royal Veterinary College; Hawkshead Lane, North Mymms Hatfield Herts AL9 7TA UK
| | - P. D. McGreevy
- Faculty of Veterinary Science; R.M.C. Gunn Building (B19); The University of Sydney; NSW 2006 Australia
| | - P. C. Thomson
- Faculty of Veterinary Science; R.M.C. Gunn Building (B19); The University of Sydney; NSW 2006 Australia
| | - D. Brodbelt
- Department of Production and Population Health; The Royal Veterinary College; Hawkshead Lane, North Mymms Hatfield Herts AL9 7TA UK
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44
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Hoenig M. Carbohydrate Metabolism and Pathogenesis of Diabetes Mellitus in Dogs and Cats. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2014; 121:377-412. [DOI: 10.1016/b978-0-12-800101-1.00012-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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45
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Maciel RM, Costa MM, Martins DB, França RT, Schmatz R, Graça DL, Duarte MMMF, Danesi CC, Mazzanti CM, Schetinger MRC, Paim FC, Palma HE, Abdala FH, Stefanello N, Zimpel CK, Felin DV, Lopes STA. Antioxidant and anti-inflammatory effects of quercetin in functional and morphological alterations in streptozotocin-induced diabetic rats. Res Vet Sci 2013; 95:389-97. [PMID: 23706762 DOI: 10.1016/j.rvsc.2013.04.028] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Revised: 03/19/2013] [Accepted: 04/25/2013] [Indexed: 11/16/2022]
Abstract
The aim of this study was to investigate functional and morphological alterations caused by oxidative stress in streptozotocin (STZ)-induced diabetic rats and to evaluate the antioxidant effect of quercetin (QUE) in this disease. One hundred and thirty male Wistar rats, it were randomly distributed in 10 different experimental groups, with ten animals per group: Control Saline (CS), Control Ethanol (CE), Control QUE 5mg/kg (CQ5), Control QUE 25mg/kg (CQ25), Control QUE 50mg/kg (CQ50), Diabetic Saline (DS), Diabetic Ethanol (DE), Diabetic QUE 5mg/kg (DQ5), Diabetic QUE25 mg/kg (DQ25), Diabetic QUE 50mg/kg (DQ50). Therefore, hyperglycemia is directly involved in oxidative stress production, as well as in functional and morphological alterations caused by the excess of free radicals. QUE, specially at the dosage of 50mg/kg, can act as an antioxidant and anti-inflammatory agent, becoming a promising adjuvant in the treatment of diabetes mellitus.
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Affiliation(s)
- R M Maciel
- Laboratório de Análises Clínicas Veterinária - LACVet, Universidade Federal de Santa Maria, Av. Roraima no 1000, Cidade Universitária, Bairro Camobi, 97105-900 Santa Maria, RS, Brazil.
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46
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Callejas D, Mann CJ, Ayuso E, Lage R, Grifoll I, Roca C, Andaluz A, Ruiz-de Gopegui R, Montané J, Muñoz S, Ferre T, Haurigot V, Zhou S, Ruberte J, Mingozzi F, High KA, Garcia F, Bosch F. Treatment of diabetes and long-term survival after insulin and glucokinase gene therapy. Diabetes 2013; 62:1718-29. [PMID: 23378612 PMCID: PMC3636629 DOI: 10.2337/db12-1113] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Accepted: 01/28/2013] [Indexed: 12/18/2022]
Abstract
Diabetes is associated with severe secondary complications, largely caused by poor glycemic control. Treatment with exogenous insulin fails to prevent these complications completely, leading to significant morbidity and mortality. We previously demonstrated that it is possible to generate a "glucose sensor" in skeletal muscle through coexpression of glucokinase and insulin, increasing glucose uptake and correcting hyperglycemia in diabetic mice. Here, we demonstrate long-term efficacy of this approach in a large animal model of diabetes. A one-time intramuscular administration of adeno-associated viral vectors of serotype 1 encoding for glucokinase and insulin in diabetic dogs resulted in normalization of fasting glycemia, accelerated disposal of glucose after oral challenge, and no episodes of hypoglycemia during exercise for >4 years after gene transfer. This was associated with recovery of body weight, reduced glycosylated plasma proteins levels, and long-term survival without secondary complications. Conversely, exogenous insulin or gene transfer for insulin or glucokinase alone failed to achieve complete correction of diabetes, indicating that the synergistic action of insulin and glucokinase is needed for full therapeutic effect. This study provides the first proof-of-concept in a large animal model for a gene transfer approach to treat diabetes.
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Affiliation(s)
- David Callejas
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Christopher J. Mann
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Eduard Ayuso
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Ricardo Lage
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Iris Grifoll
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Carles Roca
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Anna Andaluz
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
| | - Rafael Ruiz-de Gopegui
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
| | - Joel Montané
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
| | - Sergio Muñoz
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Tura Ferre
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Virginia Haurigot
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Shangzhen Zhou
- Division of Hematology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Jesús Ruberte
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Animal Health and Anatomy, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Federico Mingozzi
- Division of Hematology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Katherine A. High
- Division of Hematology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
- Howard Hughes Medical Institute, Philadelphia, Pennsylvania
| | - Felix Garcia
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
| | - Fatima Bosch
- Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma Barcelona, Bellaterra, Spain
- Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma Barcelona, Bellaterra, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
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Batchelor DJ, German AJ, Shirazi-Beechey SP. Relevance of sodium/glucose cotransporter-1 (SGLT1) to diabetes mellitus and obesity in dogs. Domest Anim Endocrinol 2013; 44:139-44. [PMID: 23375266 DOI: 10.1016/j.domaniend.2012.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Revised: 12/18/2012] [Accepted: 12/29/2012] [Indexed: 11/17/2022]
Abstract
Glucose transport across the enterocyte brush border membrane by sodium/glucose cotransporter-1 (SGLT1, coded by Slc5a1) is the rate-limiting step for intestinal glucose transport. The relevance of SGLT1 expression in predisposition to diabetes mellitus and to obesity was investigated in dogs. Cultured Caco-2/TC7 cells were shown to express SGLT1 in vitro. A 2-kbp fragment of the Slc5a1 5' flanking region was cloned from canine genomic DNA, ligated into reporter gene plasmids, and shown to drive reporter gene expression in these cells above control (P < 0.001). To determine the effect of the 3 known SNPs in this region on promoter function, new promoter/reporter constructs (all permutations of these 3 SNPs) were created by site-directed mutagenesis. No significant differences in promoter function were seen, suggesting that these SNPs do not have a significant effect on the constitutive transcription of SGLT1 mRNA in dogs. A search for novel SNPs in this region in dogs was made in 2 breeds predisposed to diabetes mellitus (Samoyed and cairn terrier), 2 breeds that rarely develop diabetes (boxer and German shepherd), and 2 breeds predisposed to obesity (Labrador retriever and cocker spaniel). The Slc5a1 5' flanking region was amplified from 10 healthy individuals of each of these breeds by high-fidelity PCR with the use of breed-labeled primers and sequenced by pyrosequencing. The sequence of the Slc5a1 5' flanking region in all individuals of all breeds tested was identical. On this evidence, variations in Slc5a1 promoter sequence between dogs do not influence the pathogenesis of diabetes mellitus or obesity in these breeds.
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Affiliation(s)
- D J Batchelor
- Epithelial Function and Development Group, Department of Functional and Comparative Genomics, Institute of Integrative Biology, Faculty of Health and Life Sciences, University of Liverpool, Liverpool L69 7ZJ, UK.
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48
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Catchpole B, Adams JP, Holder AL, Short AD, Ollier WER, Kennedy LJ. Genetics of canine diabetes mellitus: are the diabetes susceptibility genes identified in humans involved in breed susceptibility to diabetes mellitus in dogs? Vet J 2012; 195:139-47. [PMID: 23265864 DOI: 10.1016/j.tvjl.2012.11.013] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 11/09/2012] [Accepted: 11/15/2012] [Indexed: 01/22/2023]
Abstract
Diabetes mellitus is a common endocrinopathy in companion animals, characterised by hyperglycaemia, glycosuria and weight loss, resulting from an absolute or relative deficiency in the pancreatic hormone insulin. There are breed differences in susceptibility to diabetes mellitus in dogs, with the Samoyed breed being overrepresented, while Boxers are relatively absent in the UK population of diabetic dogs, suggesting that genetic factors play an important role in determining susceptibility to the disease. A number of genes, linked with susceptibility to diabetes mellitus in humans, are associated with an increased risk of diabetes mellitus in dogs, some of which appear to be relatively breed-specific. Diabetes mellitus in dogs has been associated with major histocompatibility complex (MHC) class II genes (dog leucocyte antigen; DLA), with similar haplotypes and genotypes being identified in the most susceptible breeds. A region containing a variable number of tandem repeats (VNTR) and several polymorphisms have been identified in the canine insulin gene, with some alleles associated with susceptibility or resistance to diabetes mellitus in a breed-specific manner. Polymorphisms in the canine CTLA4 promoter and in other immune response genes are associated with susceptibility to diabetes mellitus in a number of pedigree breeds. Genome wide association studies are currently underway that should shed further light on the genetic factors responsible for the breed profile seen in the diabetic dog population.
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Affiliation(s)
- Brian Catchpole
- Department of Pathology and Infectious Diseases, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK.
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Pirintr P, Chansaisakorn W, Trisiriroj M, Kalandakanond-Thongsong S, Buranakarl C. Heart rate variability and plasma norepinephrine concentration in diabetic dogs at rest. Vet Res Commun 2012; 36:207-14. [PMID: 22855304 DOI: 10.1007/s11259-012-9531-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/18/2012] [Indexed: 12/31/2022]
Abstract
Cardiac autonomic neuropathy in dogs with diabetic mellitus (DM) was evaluated using measurement of heart rate variability (HRV) and plasma norepinephrine (NE) concentration. Dogs were divided into 2 groups; the control non-DM group (n = 13) and the diabetic group (n = 22) which was further divided into the well-controlled DM (n = 11) and the poorly-controlled DM subgroups (n = 11) according to their fasting plasma fructosamine concentrations. The electrocardiogram (ECG) was recorded continuously for at least 30 min to yield HRV. The results showed that in the poorly-controlled DM subgroup, the average of normal R-R interval (mean N-N), SD of the mean of all 5-min segments of normal RR intervals (SDANN) were lower than the control group while heart rate was higher (P < 0.05). The NNA, SDNN, SDNN index and pNN50% were significantly lower when compared with the well-controlled DM subgroup (P < 0.05). The high frequency (HF) and total power were significantly lower while the ratio of low to high frequency (LF/HF) was higher (P < 0.05) when compared with the well-controlled DM subgroup. Moreover, in the poorly-controlled DM subgroup, plasma NE concentration was lower than the control group (210 ± 37 vs. 479 ± 74 pg/ml, P < 0.05). There was a significantly negative correlation between plasma NE and plasma fructosamine concentrations. It is concluded that cardiac autonomic neuropathy occurred in poorly-controlled DM dogs. The sympathetic activity was suppressed as shown by decrease in both plasma NE concentration and LF component.
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Affiliation(s)
- Prapawadee Pirintr
- Graduate program in Animal Physiology, Faculty of Veterinary Science, Chulalongkorn University, Henri Dunant Road, Patumwan, Bangkok 10330, Thailand
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Watson P. Chronic pancreatitis in dogs. Top Companion Anim Med 2012; 27:133-9. [PMID: 23148854 DOI: 10.1053/j.tcam.2012.04.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Accepted: 04/30/2012] [Indexed: 12/14/2022]
Abstract
Chronic pancreatitis used to be considered uncommon in dogs, but recent pathological and clinical studies have confirmed that it is in fact a common and clinically significant disease. Clinical signs can vary from low-grade recurrent gastrointestinal signs to acute exacerbations that are indistinguishable from classical acute pancreatitis. Chronic pancreatitis is a significant cause of chronic pain in dogs, which must not be underestimated. It also results in progressive impairment of endocrine and exocrine function and the eventual development of diabetes mellitus or exocrine pancreatic insufficiency or both in some affected dogs at end stage. The etiology is unknown in most cases. Chronic pancreatitis shows an increased prevalence in certain breeds, and recent work in English Cocker Spaniels suggests it is part of a polysystemic immune-mediated disease in this breed. The histological and clinical appearance is different in different breeds, suggesting that etiologies may also be different. Diagnosis is challenging because the sensitivities of the available noninvasive tests are relatively low. However, with an increased index of suspicion, clinicians will recognize more cases that will allow them to institute supportive treatment to improve the quality of life of the patient.
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Affiliation(s)
- Penny Watson
- Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom.
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