Histological evaluation of the distribution of systemic AA-amyloidosis in nine domestic shorthair cats.

Autor: Moccia V; Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, PD, Italy., Vogt AC; Department for BioMedical Research, Faculty of Medicine, University of Bern, Bern, Switzerland.; Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland., Ricagno S; Department of Biosciences, University of Milano, Milano, MI, Italy., Callegari C; IDEXX Laboratories, Milano, MI, Italy., Vogel M; Department for BioMedical Research, Faculty of Medicine, University of Bern, Bern, Switzerland., Zini E; Department of Animal Medicine, Production and Health, University of Padova, Legnaro, PD, Italy.; AniCura Istituto Veterinario Novara, Granozzo con Monticello, NO, Italy.; Clinic for Small Animal Internal Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland., Ferro S; Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, PD, Italy.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2023 Nov 02; Vol. 18 (11), pp. e0293892. Date of Electronic Publication: 2023 Nov 02 (Print Publication: 2023).
DOI: 10.1371/journal.pone.0293892
Abstrakt: Amyloidosis is a group of protein-misfolding disorders characterized by the accumulation of amyloid in organs, both in humans and animals. AA-amyloidosis is considered a reactive type of amyloidosis and in humans is characterized by the deposition of AA-amyloid fibrils in one or more organs. In domestic shorthair cats, AA-amyloidosis was recently reported to be frequent in shelters. To better characterize this pathology, we report the distribution of amyloid deposits and associated histological lesions in the organs of shelter cats with systemic AA-amyloidosis. AA-amyloid deposits were identified with Congo Red staining and immunofluorescence. AA-amyloid deposits were then described and scored, and associated histological lesions were reported. Based on Congo Red staining and immunofluorescence nine shelter cats presented systemic AA-amyloidosis. The kidney (9/9), the spleen (8/8), the adrenal glands (8/8), the small intestine (7/7) and the liver (8/9) were the organs most involved by amyloid deposits, with multifocal to diffuse and from moderate to severe deposits, both in the organ parenchyma and/or in the vascular compartment. The lung (2/9) and the skin (1/8) were the least frequently involved organs and deposits were mainly focal to multifocal, mild, vascular and perivascular. Interestingly, among the organs with fibril deposition, the stomach (7/9), the gallbladder (6/6), the urinary bladder (3/9), and the heart (6/7) were reported for the first time in cats. All eye, brain and skeletal muscle samples had no amyloid deposits. An inflammatory condition was identified in 8/9 cats, with chronic enteritis and chronic nephritis being the most common. Except for secondary cell compression, other lesions were not associated to amyloid deposits. To conclude, this study gives new insights into the distribution of AA-amyloid deposits in cats. A concurrent chronic inflammation was present in almost all cases, possibly suggesting a relationship with AA-amyloidosis.
Competing Interests: The authors have declared that no competing interests exist.
(Copyright: © 2023 Moccia et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
Databáze: MEDLINE
Nepřihlášeným uživatelům se plný text nezobrazuje