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Fietz SA, Grochow T, Schares G, Töpfer T, Heilmann RM. Fulminant Pneumonia Due to Reactivation of Latent Toxoplasmosis in a Cat-A Case Report. Pathogens 2023; 13:7. [PMID: 38276153 PMCID: PMC10818954 DOI: 10.3390/pathogens13010007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/18/2023] [Accepted: 12/19/2023] [Indexed: 01/27/2024] Open
Abstract
Toxoplasma (T.) gondii is an obligate intracellular parasite with felids, including domestic cats, as definitive hosts. In immunocompetent individuals, T. gondii infection is usually asymptomatic. However, under immunosuppression, it may have severe pathological impacts, which often result from the reactivation of a chronic infection. In this case study, a 21-month-old female domestic shorthair cat-diagnosed with primary immune-mediated hemolytic anemia three months prior and treated with cyclosporine and prednisolone-presented with acute tachypnea, dyspnea, diarrhea, and anorexia. Thoracic radiography suggested severe pneumonia. Testing for Mycoplasma spp., Anaplasma spp., Ehrlichia spp., and lungworm infection was negative. Serology for T. gondii revealed seroconversion of IgG, but not of IgM, indicating previous exposure to T. gondii. The cat remained stable but tachypneic for three days, followed by an acute onset of dyspnea and clinical deterioration, after which euthanasia was elected. Numerous protozoa were present in a postmortem transtracheal bronchoalveolar lavage and fine-needle aspiration of the lung. Microsatellite typing classified the extracted DNA as T. gondii type II variant TgM-A. This case demonstrates that T. gondii reactivation, leading to fulminant pneumonia, can be a sequela of immunosuppressive treatment in cats and should, therefore, be considered as a differential diagnosis in immunosuppressed cats with acute-onset respiratory signs. Rapid diagnosis may prevent fatal consequences.
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Affiliation(s)
- Simone A. Fietz
- Institute of Veterinary Anatomy, Histology and Embryology, College of Veterinary Medicine, Leipzig University, DE-04103 Leipzig, Germany; (S.A.F.); (T.G.)
| | - Thomas Grochow
- Institute of Veterinary Anatomy, Histology and Embryology, College of Veterinary Medicine, Leipzig University, DE-04103 Leipzig, Germany; (S.A.F.); (T.G.)
| | - Gereon Schares
- National Reference Laboratory for Toxoplasmosis, Institute of Epidemiology, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, DE-17493 Greifswald-Insel Riems, Germany;
| | - Tanja Töpfer
- Department for Small Animals, College of Veterinary Medicine, University of Leipzig, DE-04103 Leipzig, Germany;
| | - Romy M. Heilmann
- Department for Small Animals, College of Veterinary Medicine, University of Leipzig, DE-04103 Leipzig, Germany;
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2
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Yamkate P, Funke S, Steiger K, Gold RM, Lidbury JA, Karst U, Steiner JM. Quantitative bioimaging of copper in frozen liver specimens from cats using laser ablation-inductively coupled plasma-mass spectrometry. J Feline Med Surg 2023; 25:1098612X231186919. [PMID: 37522313 PMCID: PMC10812054 DOI: 10.1177/1098612x231186919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
OBJECTIVES The aim of this study was to assess laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) as a tool for measuring concentrations and determining accumulation of copper in frozen liver specimens from cats. METHODS Six frozen liver specimens were evaluated by qualitative copper staining and quantitative flame atomic absorption spectroscopy. Tissue specimens were cryo-sectioned and quantitative bioimaging of copper was performed using LA-ICP-MS. Results were compared with those obtained using conventional methods. RESULTS Of the six specimens, only one showed positive staining for copper with rhodanine. Using flame atomic absorption spectroscopy (FAAS), one specimen showed a deficient copper level (<100 µg/g dry weight), two specimens had copper within the reference interval (RI; 150-180 µg/g) and three specimens had copper concentrations above the RI. Bioimaging from LA-ICP-MS showed inhomogeneous distribution of hepatic copper. The areas with dense copper accumulation were represented as hotspots in the liver specimens. Hepatic copper quantification by LA-ICP-MS correlated well with copper quantified by FAAS (r = 0.96, P = 0.002). CONCLUSIONS AND RELEVANCE Our findings suggest that quantitative bioimaging by LA-ICP-MS could be used to demonstrate the distribution and concentration of copper in frozen liver specimens from cats. The distribution of copper in these specimens was inhomogeneous with dense accumulation represented as hotspots on tissue sections. A positive correlation of hepatic copper concentrations determined by LA-ICP-MS and FAAS was found. Further studies to establish an RI for hepatic copper using this technique and to further determine its clinical utility are warranted.
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Affiliation(s)
- Punyamanee Yamkate
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
- Department of Veterinary Medicine, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Sabrina Funke
- Institute for Inorganic and Analytical Chemistry, University of Münster, Münster, Germany
| | - Katja Steiger
- Institute of Pathology, School of Medicine, Technical University Munich, Munich, Germany
| | - Randi M Gold
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Jonathan A Lidbury
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Uwe Karst
- Institute for Inorganic and Analytical Chemistry, University of Münster, Münster, Germany
| | - Joerg M Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
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Recchia BK, Stokol T, Goto-Koshino Y, Ohno K, Miner KDR. Diagnosis, management and genetic analysis of a cat with primary copper hepatopathy. JFMS Open Rep 2023; 9:20551169231177275. [PMID: 37427085 PMCID: PMC10328163 DOI: 10.1177/20551169231177275] [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] [Accepted: 05/04/2023] [Indexed: 07/11/2023] Open
Abstract
Case summary A 2-year-old spayed female domestic longhair cat was presented for evaluation of chronic ocular discharge and occasional vomiting. While physical examination findings were consistent with an upper respiratory infection (URI), serum chemistry results revealed increased liver enzyme activities. Histopathologic examination of a liver biopsy identified substantial centrilobular accumulation of copper in hepatocytes - strongly suggestive of primary copper hepatopathy (PCH). Retrospective cytologic examination of a liver aspirate also identified copper aggregates in hepatocytes. After transitioning to a low-copper diet, 1 year of chelation therapy with D-penicillamine achieved normalization of liver enzyme activities and resolution of persistent ocular signs. Subsequently, a long-term regimen of zinc gluconate has been successfully managing the cat's PCH for almost 3 years. Sanger sequencing of the cat's ATP7B gene, which encodes a copper-transporting protein, revealed a novel, 'likely pathogenic', single nucleotide variation (c.3670t/a [p.Trp1224Arg]), for which the cat is heterozygous. Relevance and novel information Recommendations are described for the long-term clinical management of feline PCH - a previously attainable but unreported outcome - with considerations for mitigating the speculated oxidation-exacerbated ocular risks of concurrent URI. This report is the first to include identification of copper aggregates in a liver aspirate from a cat - evidence that liver aspirates from cats could be routinely examined for copper as is standard practice for those from dogs. The cat is also the first reported with PCH and a 'likely pathogenic' heterozygous ATP7B genotype, which suggests that normal ATP7B alleles could be recessive to or incompletely/co- dominant with deleterious ATP7B alleles in cats, as has been reported in other species.
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Affiliation(s)
| | - Tracy Stokol
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Yuko Goto-Koshino
- Molecular Diagnostic Laboratory, Veterinary Medical Center, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Koichi Ohno
- Department of Veterinary Internal Medicine, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyo-ku, Toyko, Japan
| | - Kayla DR Miner
- Affectionately Cats Veterinary Hospital, Williston, VT, USA
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Ullal TV, Lakin S, Gallagher B, Sbardellati N, Abdo Z, Twedt DC. Demographic and histopathologic features of dogs with abnormally high concentrations of hepatic copper. J Vet Intern Med 2022; 36:2016-2027. [DOI: 10.1111/jvim.16580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
Affiliation(s)
| | - Steven Lakin
- Colorado State University Fort Collins Colorado USA
| | | | | | - Zaid Abdo
- Colorado State University Fort Collins Colorado USA
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5
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Summers S, Stockman J, Larsen JA. Evaluation of iron, copper and zinc concentrations in commercial foods formulated for healthy cats. J Feline Med Surg 2022; 24:366-372. [PMID: 34251295 PMCID: PMC10812249 DOI: 10.1177/1098612x211026254] [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] [Indexed: 11/17/2022]
Abstract
OBJECTIVES The aim of this study was to analyze iron, copper and zinc concentrations in commercial foods and compare among food formats (dry, canned, raw), foods marketed by age category (adult 1+ years and senior 7+ years) and foods intended for adult maintenance vs all life stages. METHODS In total, 112 commercial non-therapeutic food products marketed for healthy adult and senior cats were purchased in the USA. Foods were analyzed for their proximate composition. Trace mineral concentrations were measured using inductively coupled argon plasma-optical emission spectroscopy and described on a calculated metabolizable energy basis using standard modified Atwater values. RESULTS Measured iron (median 58.4 mg/1000 kcal [range 15.7-379.0]), copper (median 5.6 mg/1000 kcal [range 0.8-13.3]) and zinc (median 47.6 mg/1000 kcal [range 7.6-128.1]) concentrations were highly variable among cat foods. When all food products - regardless of their nutritional adequacy substantiation method - were compared with the Association of American Feed Control Officials regulatory minimums, 13/112 food products had a mineral deficiency, of which a majority (n = 11/13) were raw food products. Raw foods had significantly lower trace mineral concentrations compared with dry food products and, except for copper, canned food products. Cat foods marketed for senior cats had higher iron (P = 0.019) and zinc (P <0.0001) concentrations than foods marketed for adult cats. Foods intended for adult maintenance had higher iron (P = 0.003) and zinc concentrations than foods intended for all life stages (P <0.0001). CONCLUSIONS AND RELEVANCE Iron, copper and zinc concentrations in commercial non-therapeutic foods for adult and senior cats are highly variable. A minority of foods - mainly raw food products - were deficient in these minerals. It is unknown if some foods with high trace mineral concentrations could have adverse effects as studies are needed to establish safe upper limits for dietary intake of trace minerals in healthy cats.
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6
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Torkelson MR, Heinze CR, Graham JE. Survey of copper and zinc concentrations in commercially available dry ferret diets. J Exot Pet Med 2022. [DOI: 10.1053/j.jepm.2022.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Yamkate P, Gold RM, Twedt DC, Suchodolski JS, Steiner JM, Lidbury JA. Assessment of the intracellular distribution of copper in liver specimens from cats. PLoS One 2022; 17:e0264003. [PMID: 35157741 PMCID: PMC8843214 DOI: 10.1371/journal.pone.0264003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 02/01/2022] [Indexed: 11/18/2022] Open
Abstract
The intracellular distribution of copper in the liver has been investigated in dogs and humans. However, this has not been reported in cats. This study aimed to assess the intracellular copper distribution in liver specimens from cats with a range of hepatic copper concentrations. Twenty-nine frozen liver specimens from cats were included. Each liver specimen was divided into two pieces for overall copper quantification and tissue fractionation. The copper concentrations in liver specimens and liver fractions were measured by flame atomic absorption spectroscopy. Five specimens had copper concentrations < 100 μg/g dry weight, eight had copper concentrations between 100 and 180 μg/g, 14 had copper concentrations between 181 and 700 μg/g, and two had copper concentrations >700 μg/g. Only one specimen had positive copper staining. Regardless of the overall concentrations, copper was mostly found in the cytosolic fraction followed by the nuclear, large granule, and microsomal fractions. Our findings indicate that similarly to other species, intracellular copper is predominantly found in the cytosolic and nuclear fractions in cats. The distribution in cats with copper-loaded conditions, such as primary copper hepatopathy, was not assessed but warrants evaluation.
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Affiliation(s)
- Punyamanee Yamkate
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
| | - Randi M. Gold
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, Texas, United States of America
| | - David C. Twedt
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, United States of America
| | - Jan S. Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, Texas, United States of America
| | - Joerg M. Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, Texas, United States of America
| | - Jonathan A. Lidbury
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, Texas A&M University, College Station, Texas, United States of America
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Richard JN, Graham JE, Center SA, Garner MM, Reavill DR. Hepatic copper accumulates in ferrets with and without hepatobiliary disease. Am J Vet Res 2022; 83:371-380. [DOI: 10.2460/ajvr.21.08.0131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
OBJECTIVE
To determine hepatic copper concentrations and zonal distribution in ferrets with and without hepatobiliary disease, validate rhodanine-based qualitative copper scoring and digital copper quantification in ferret hepatic samples, and ascertain whether clinical features predicted copper accumulation.
ANIMALS
34 ferrets, including 7 with necroinflammatory disease, 5 with hepatocellular carcinoma, 13 with non-necroinflammatory disease, and 9 with no hepatobiliary disease.
PROCEDURES
Rhodanine-based digital copper quantification was validated by use of liver dually measured by atomic absorption spectroscopy and digital scanning (R2 = 0.98). Clinical features and hepatic copper scores and concentrations (dry weight liver) were compared between groups. Zonal copper distribution was determined.
RESULTS
Hepatic copper concentration was strongly correlated with copper scores (ρ = 0.88). Ferrets with hepatobiliary disease were significantly older and had significantly higher serum alkaline phosphatase and γ-glutamyltransferase activities and creatinine concentrations. Centrilobular copper accumulated in 23 of 34 (64%) ferrets with (n = 15) and without (8) hepatobiliary disease. Median copper concentrations were not significantly different between ferrets with and without hepatobiliary disease but were significantly higher within neoplastic hepatic tissue in ferrets with hepatocellular carcinoma. Hepatic copper concentrations exceeded feline (> 180 µg/g) and canine (> 400 µg/g) reference limits in 19 and 9 ferrets, respectively. Hepatic copper > 1,000 µg/g occurred in 5 ferrets with and 2 without hepatobiliary disease. Clinical features did not predict copper accumulation.
CLINICAL RELEVANCE
Rhodanine-based digital copper quantification and qualitative copper scoring discerned liver copper accumulation in ferrets. Ferrets with and without hepatobiliary disease displayed a propensity for centrilobular hepatic copper accumulation of uncertain clinical importance. Clinical and clinicopathologic features could not exclusively implicate pathologic copper accumulation.
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Affiliation(s)
- Julianne N. Richard
- 1Department of Clinical Sciences, Cummings School of Veterinary Medicine, North Grafton, MA
| | - Jennifer E. Graham
- 1Department of Clinical Sciences, Cummings School of Veterinary Medicine, North Grafton, MA
| | - Sharon A. Center
- 2Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY
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9
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Yuschenkoff D, Graham J, Barton BA, Garner MM. Evaluation of the clinical presentation and histologic lesions of hepatic copper accumulation in sugar gliders (Petaurus breviceps). J Exot Pet Med 2021. [DOI: 10.1053/j.jepm.2021.06.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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Yamkate P, Gold RM, Xenoulis PG, Steiger K, Twedt DC, Suchodolski JS, Steiner JM, Lidbury JA. Assessment of copper accumulation in archived liver specimens from cats. J Feline Med Surg 2021; 23:526-533. [PMID: 33026278 PMCID: PMC10741295 DOI: 10.1177/1098612x20961350] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The aim of this study was to assess hepatic copper concentrations and zonal distribution in cat liver specimens. METHODS For this study, 121 archived, formalin-fixed, paraffin-embedded liver specimens from cats were used. Tissue sections were stained for copper with rhodanine and scored from 0 (no copper accumulation) to 5 (panlobular copper accumulation). The tissue specimens were then deparaffinized and hepatic copper concentrations were measured using flame atomic absorption spectroscopy. RESULTS Tissue samples were categorized into four groups based on histopathologic findings: (1) no significant histopathologic hepatic changes (n = 66); (2) hepatic steatosis (n = 18); (3) inflammatory or infectious disease (n = 24); and (4) neoplasia (n = 13). Of the 121 specimens, 13 (11%) stained positive for copper, with three having a score ⩾3. Thirty-seven specimens (31%) had copper concentrations above the reference interval ([RI] <180 µg/g dry weight liver). Copper concentrations in cats with hepatic inflammatory or infectious disease were significantly higher than cats with hepatic steatosis (P = 0.03). Copper-staining score and concentration were positively correlated (rs = 0.46, P <0.001). CONCLUSIONS AND RELEVANCE Despite the fact that 31% of specimens had copper concentrations above the RI, only 11% showed positive copper staining and only 2.5% had a score ⩾3. Our findings suggest that hepatic copper concentrations greater than the upper limit of the RI are relatively common in cats. Further studies to determine the factors that influence hepatic copper staining in cats and to establish contemporary RIs for hepatic copper in healthy cats are warranted.
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Affiliation(s)
- Punyamanee Yamkate
- Gastrointestinal Laboratory, Department
of Small Animal Clinical Sciences, Texas A&M University, College Station, TX,
USA
| | - Randi M Gold
- Gastrointestinal Laboratory, Department
of Small Animal Clinical Sciences, Texas A&M University, College Station, TX,
USA
| | - Panagiotis G Xenoulis
- Gastrointestinal Laboratory, Department
of Small Animal Clinical Sciences, Texas A&M University, College Station, TX,
USA
- Clinic of Medicine, Faculty of
Veterinary Science, University of Thessaly, Karditsa, Greece
| | - Katja Steiger
- Institute of Pathology, School of
Medicine, Technical University Munich, Munich, Germany
| | - David C Twedt
- Department of Clinical Sciences, College
of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort
Collins, CO, USA
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, Department
of Small Animal Clinical Sciences, Texas A&M University, College Station, TX,
USA
| | - Joerg M Steiner
- Gastrointestinal Laboratory, Department
of Small Animal Clinical Sciences, Texas A&M University, College Station, TX,
USA
| | - Jonathan A Lidbury
- Gastrointestinal Laboratory, Department
of Small Animal Clinical Sciences, Texas A&M University, College Station, TX,
USA
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Miller AJ, Center SA, Randolph JF, Friesen CH, Miller AD, Warner KW. Disparities in hepatic copper concentrations determined by atomic absorption spectroscopy, inductively coupled plasma mass spectrometry, and digital image analysis of rhodanine-stained sections in dogs. J Am Vet Med Assoc 2021; 258:395-406. [PMID: 33539202 DOI: 10.2460/javma.258.4.395] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate disparities in hepatic copper concentrations determined by atomic absorption spectroscopy (AAS), inductively coupled plasma mass spectrometry (ICP-MS), and digital image analysis of rhodanine-stained sections. ANIMALS 516 dogs. PROCEDURES Medical records of dogs for which hepatic biopsy specimens had been submitted between January 1999 and December 2019 for evaluation of copper content were reviewed. Paired hepatic copper concentrations obtained with digital image analysis and AAS or ICP-MS were compared, and Spearman rank correlation coefficients were calculated to test for correlations between qualitative copper accumulation scores and hepatic copper concentrations. For dogs for which ≥ 4 rhodanine-stained hepatic sections were available, intraindividual variation in copper distribution across hepatic sections was evaluated. RESULTS Median hepatic copper concentrations obtained with digital image analysis exceeded concentrations obtained with AAS or ICP-MS. Concentrations were also higher in older dogs (≥ 9 years vs < 9 years), dogs of breeds with a typical body weight ≥ 20 kg (44 lb), and dogs with necroinflammatory changes or uneven copper distribution. Qualitative copper accumulation scores were significantly associated with hepatic copper concentrations; however, the correlation between qualitative score and concentration obtained with digital image analysis (rs = 0.94) was higher than the correlation between qualitative score and concentration obtained with AAS (rs = 0.75) or ICP-MS (rs = 0.57). The coefficient of variation for hepatic copper concentrations obtained with digital image analysis was significantly higher for dogs with higher hepatic copper concentrations. CONCLUSIONS AND CLINICAL RELEVANCE Results suggested that spectroscopic-spectrometric analysis of hepatic biopsy specimens commonly underestimated the concentration obtained by digital image analysis of rhodanine-stained sections.
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Center SA, Richter KP, Twedt DC, Wakshlag JJ, Watson PJ, Webster CRL. Is it time to reconsider current guidelines for copper content in commercial dog foods? J Am Vet Med Assoc 2021; 258:357-364. [DOI: 10.2460/javma.258.4.357] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Asada H, Chambers JK, Kojima M, Goto-Koshino Y, Nakagawa T, Yokoyama N, Tsuboi M, Uchida K, Tsujimoto H, Ohno K. Variations in ATP7B in cats with primary copper-associated hepatopathy. J Feline Med Surg 2020; 22:753-759. [PMID: 31687873 PMCID: PMC10814495 DOI: 10.1177/1098612x19884763] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Primary copper-associated hepatopathy (PCH) has been reported in young cats. Although our group recently reported a young cat with PCH harbouring single-nucleotide variations in ATP7B, limited information is available regarding its association with the pathogenesis of feline PCH. The objective of this study was to investigate the prevalence of ATP7B variations in cats with PCH. METHODS Rhodanine staining was performed to detect hepatic copper accumulation (HCA) in intraoperative liver tissue specimens from 54 cats. In cats with HCA, variations in ATP7B and COMMD1 and serum ceruloplasmin activity were analysed. RESULTS Based on age, liver histopathological findings and hepatic distribution of accumulated copper, PCH was suspected in 4/54 cats. Sequence analysis of ATP7B and COMMD1 revealed single-nucleotide variations in ATP7B in 3/4 cats with PCH. Among the cats with PCH, one showed remarkably low serum ceruloplasmin activity, while the other three did not. CONCLUSIONS AND RELEVANCE The results of this study suggest that some cats with PCH harbour single-nucleotide variations in ATP7B, suggesting that feline PCH is an equivalent disorder to human Wilson's disease. This study provides basic evidence facilitating further studies of the pathophysiology and treatment of feline PCH.
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Affiliation(s)
- Hajime Asada
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - James K Chambers
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Mari Kojima
- Veterinary Medical Center, Graduate School of Agricultural and Life Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Yuko Goto-Koshino
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Taisuke Nakagawa
- Veterinary Medical Center, Graduate School of Agricultural and Life Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Nozomu Yokoyama
- Veterinary Medical Center, Graduate School of Agricultural and Life Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Masaya Tsuboi
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Kazuyuki Uchida
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Hajime Tsujimoto
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Koichi Ohno
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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14
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Chandler AM, Center SA, Randolph JF, Davignon DL, McDonough SP, Warner KL. Reference limits for hepatic bile duct-to-arteriole and bile duct-to-portal tract ratios in healthy cats. Am J Vet Res 2019; 80:15-23. [PMID: 30605040 DOI: 10.2460/ajvr.80.1.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To establish reference limits for hepatic bile duct-to-arteriole ratio (BD:A) and bile duct-to-portal tract ratio (BD:PT) in healthy cats and assess whether these parameters could be used to support a diagnosis of biliary ductopenia in cats. SAMPLE Hepatic biopsy samples from healthy cats (n = 20) and cats with ductopenia (2). PROCEDURES Hepatic biopsy samples from healthy cats were used to count the number of bile ducts and hepatic arterioles in 20 portal tracts for each cat. Mean BD:A and mean BD:PT for each cat were calculated, and these values were used to determine reference limits for mean BD:A and mean BD:PT. Results of histologic evaluation, including immunohistochemical staining in some instances, were compared for healthy cats versus cats with ductopenia. RESULTS Of the 400 portal tracts from healthy cats, 382 (95.5%) and 396 (99.0%) had BD:A and BD:PT, respectively, ≥ 1.0, with less variability in BD:A. Mean BD:A and BD:PT were markedly lower in both cats with ductopenia, compared with values for healthy cats. However, only mean BD:A for cats with ductopenia was below the reference limit of 0.59. CONCLUSIONS AND CLINICAL RELEVANCE Results indicated that systematic evaluation of BD:A, with a lower reference limit of 0.59 to define biliary ductopenia in cats, may be a discrete and easily applied morphometric tool to enhance detection of ductopenia in cats. However, application of this ratio required evaluation of ≥ 20 portal tracts with cross-sectioned portal elements to determine a mean BD:A value.
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Asada H, Kojima M, Nagahara T, Goto-Koshino Y, Chambers JK, Nakagawa T, Yokoyama N, Uchida K, Tsujimoto H, Ohno K. Hepatic copper accumulation in a young cat with familial variations in the ATP7B gene. J Vet Intern Med 2018; 33:874-878. [PMID: 30561139 PMCID: PMC6430902 DOI: 10.1111/jvim.15399] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 11/16/2018] [Indexed: 12/12/2022] Open
Abstract
A 9‐month‐old intact crossbred female cat was presented with jaundice, intermittent anorexia and lethargy, increased hepatic enzyme activities, and hyperammonemia. Abdominal ultrasound and computed tomographic examinations determined that the liver had a rounded and irregular margin, and histopathological examination identified excessive accumulation of copper hepatocytes in the liver. Concentrations of both blood and urine copper were higher than in healthy cats. The patient responded well to treatment with penicillamine. Clinicopathological abnormalities and clinical signs improved within 2 months, and the patient was alive for >9 months after starting treatment. Genetic examination determined that the patient and its littermate had a single‐nucleotide variation (SNV, p. T1297R) that impaired the function of the ATP7B gene product; the gene that is mutated in patients with Wilson's disease (WD). Hepatic copper accumulation was believed to be associated with the SNV of the ATP7B gene, and the patient had a genetic disorder of copper metabolism equivalent to WD in humans.
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Affiliation(s)
- Hajime Asada
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Mari Kojima
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Takuro Nagahara
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Yuko Goto-Koshino
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - James K Chambers
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Science, The University of Tokyo, Tokyo, Japan
| | - Taisuke Nakagawa
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Nozomu Yokoyama
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Kazuyuki Uchida
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Science, The University of Tokyo, Tokyo, Japan
| | - Hajime Tsujimoto
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Koichi Ohno
- Department of Veterinary Internal Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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16
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Abstract
Histopathologic evaluation of liver biopsy specimens yields information that is not otherwise obtainable and is frequently essential for diagnosing hepatic disease. Percutaneous needle biopsy, laparoscopic biopsy, and surgical biopsy each have their own set of advantages and disadvantages. Care should be taken to ensure an adequate amount of tissue is collected for meaningful histologic evaluation. Because sampling error is a limitation of hepatic biopsy, multiple liver lobes should be biopsied. This article discusses the indications for liver biopsy, associated risks, advantages and disadvantages of different biopsy techniques, and strategies to get the most useful information possible out of this process.
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Affiliation(s)
- Jonathan A Lidbury
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, 4474 TAMU, College Station, TX 77843, USA.
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17
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Pillai S, Center SA, McDonough SP, Demarco J, Pintar J, Henderson AK, Cooper J, Bolton T, Sharpe K, Hill S, Benedict AG, Haviland R. Ductal Plate Malformation in the Liver of Boxer Dogs: Clinical and Histological Features. Vet Pathol 2016; 53:602-13. [PMID: 26797094 DOI: 10.1177/0300985815610567] [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] [Indexed: 12/17/2022]
Abstract
Ductal plate malformations (DPMs) represent developmental biliary disorders with a wide phenotypic spectrum. This study characterizes DPM in 30 Boxer dogs. Median age was 1.5 (range, 0.3-10.0) years, with 12 dogs <1 year. Clinical features included increased serum levels of liver enzymes (28), gastrointestinal signs (16), poor body condition (14), abdominal effusion (9), and hepatic encephalopathy (2). Additional malformations included gallbladder atresia (8), atrophied left liver (2), absent quadrate lobe with left-displaced gallbladder (1), portal vasculature atresia (left liver, 1), intrahepatic portosystemic shunt (1), and complex intrahepatic arteriovenous malformation (1). All dogs had portal tracts dimensionally expanded by a moderate-to-severe multiple small bile duct phenotype embedded in abundant extracellular matrix; 80% displayed variable portal-to-portal bridging. Quantitative analysis confirmed significantly increased fibrillar collagen and a 3-fold increased portal tract area relative to 6 Boxer and 10 non-Boxer controls. Biliary phenotype was dominated by tightly formed CK19-positive ductules, typically 10 to 15 μm in diameter, with 3 to >30 profiles per portal tract, reduced luminal apertures, and negative Ki-67 immunoreactivity. CK19-positive biliary epithelium intersected directly with zone 1 hepatocytes as a signature feature when considered with other DPM characteristics. Phenotypic variation included a multiple small bile duct phenotype (all dogs), predominantly thin-walled sacculated ducts (4), well-formed saccular ducts (4), and sacculated segmental, interlobular, and intralobular ducts (Caroli malformation, 2 dogs, one with bridging portal fibrosis). Histologic evidence of portal venous hypoperfusion accompanied increased biliary profiles in every case. We propose that this spectrum of disorders be referred to as DPM with appropriate modifiers to characterize the unique phenotypes.
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Affiliation(s)
- S Pillai
- Comparative and Genomic Pathology at Memorial Sloan Kettering Cancer Center, Laboratory of comparative pathology, New York, NY, USA
| | - S A Center
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - S P McDonough
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - J Demarco
- Garden State Veterinary Specialists, Tinton Falls, NJ, USA
| | - J Pintar
- Garden State Veterinary Specialists, Tinton Falls, NJ, USA
| | - A K Henderson
- Garden State Veterinary Specialists, Tinton Falls, NJ, USA
| | - J Cooper
- Tuft's Veterinary Emergency Treatment and Specialities, Walpole, MA, USA
| | - T Bolton
- Internal Medicine Resident, Department of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - K Sharpe
- Blue Pearl Specialty and Emergency Medicine for Pets, Grand Rapids, MI, USA
| | - S Hill
- Veterinary Specialty Hospital, San Diego, San Diego, CA, USA
| | - A G Benedict
- VCA Shoreline Veterinary Referral and Emergency Center, Shelton, CT, USA
| | - R Haviland
- South Carolina Veterinary Specialists, Columbia, SC, USA
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18
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Genotoxicity and cytotoxicity of copper oxychloride in cultured human lymphocytes using cytogenetic and molecular tests. Cytotechnology 2016; 68:2027-36. [PMID: 26754841 DOI: 10.1007/s10616-016-9943-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 01/04/2016] [Indexed: 10/22/2022] Open
Abstract
The genotoxicity of copper oxychloride was investigated in human lymphocytes using chromosome aberration (CA) and micronucleus (MN) tests and the randomly amplified polymorphic DNA-polymerase chain reaction technique. The lymphocytes were treated with 3, 6, and 12 µg/mL of copper oxychloride for 24 and 48 h. Copper oxychloride increased CA and abnormal cells in a dose-dependent manner. The frequency of MN and micronucleated binuclear cells also increased at all concentrations and treatment periods. However, copper oxychloride cytotoxicity, observed through lower mitotic and nuclear division index, was significantly lower only at the higher concentrations (6 and 12 µg/mL). Copper oxychloride increased the polymorphic bands and decreased genomic template stability. In conclusion, in this study it was confirmed that copper oxychloride has genotoxic potential for human lymphocytes in vitro. Additionally, caution is advised for its use as a fungicide, because it may increase the risk of exposure through the food chain.
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19
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Goussev SA, Center SA, Randolph JF, Kathrani A, Butler BP, McDonough SP. Clinical Characteristics of Hepatocellular Carcinoma in 19 cats from a Single Institution (1980-2013). J Am Anim Hosp Assoc 2015; 52:36-41. [PMID: 26606201 DOI: 10.5326/jaaha-ms-6289] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Clinical features of feline hepatocellular carcinoma (HCA) have been poorly characterized. In this retrospective study, we describe the signalment, clinical features, clinicopathologic parameters, imaging characteristics, hepatic mass size and lobe distribution, concurrent disorders, and survival in 19 cats with HCA. HCA is a rare neoplasm in elderly cats often associated with weight loss, hyporexia, and increased hepatic transaminase activities. Concurrent disorders (e.g., hyperthyroidism, inflammatory bowel disease, cholangiohepatitis, copper-associated hepatopathy) often confounded interpretation of clinical and clinicopathologic findings; 42% of HCA were incidentally identified. Although an abdominal mass was palpated in only 21% of cats, many cats had masses identified on ultrasonographic imaging with 47% having lesions >4 cm. Tumors were nearly equally distributed between right and left liver lobes, and two cats had HCA in multiple liver lobes. Median survival of eight cats diagnosed antemortem was 1.7 (0.6 to 6.5) yr. Median survival of six cats undergoing HCA surgical resection was 2.4 (1.0 to 6.5) yr with two cats still alive at time of manuscript submission. Following surgical resection, one cat treated with carboplatin survived 4 yr. Two cats with HCA diagnosed antemortem without surgical resection survived for 0.6 and 1 yr.
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Affiliation(s)
- Staci A Goussev
- From the Departments of Clinical Sciences (S.A.G., S.A.C., J.F.R., A.K.) and Biomedical Sciences (B.P.B., S.P.M.), College of Veterinary Medicine, Cornell University, Ithaca, NY
| | - Sharon Anne Center
- From the Departments of Clinical Sciences (S.A.G., S.A.C., J.F.R., A.K.) and Biomedical Sciences (B.P.B., S.P.M.), College of Veterinary Medicine, Cornell University, Ithaca, NY
| | - John F Randolph
- From the Departments of Clinical Sciences (S.A.G., S.A.C., J.F.R., A.K.) and Biomedical Sciences (B.P.B., S.P.M.), College of Veterinary Medicine, Cornell University, Ithaca, NY
| | | | - Brian P Butler
- From the Departments of Clinical Sciences (S.A.G., S.A.C., J.F.R., A.K.) and Biomedical Sciences (B.P.B., S.P.M.), College of Veterinary Medicine, Cornell University, Ithaca, NY
| | - Sean P McDonough
- From the Departments of Clinical Sciences (S.A.G., S.A.C., J.F.R., A.K.) and Biomedical Sciences (B.P.B., S.P.M.), College of Veterinary Medicine, Cornell University, Ithaca, NY
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