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Jotha-Mattos L, Vieira AB, Castelo MDSM, Queiroz ASDM, de Souza HJM, de Alencar NX, Lima LMTR. Amyloidogenesis of feline amylin and plasma levels in cats with diabetes mellitus or pancreatitis. Domest Anim Endocrinol 2021; 74:106532. [PMID: 32841886 DOI: 10.1016/j.domaniend.2020.106532] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 07/24/2020] [Accepted: 07/25/2020] [Indexed: 12/12/2022]
Abstract
Amylin is a pancreatic hormone cosecreted along with insulin and involved in pancreatic amyloidosis and β-cell apoptosis in diabetic cats and humans. Amylin is usually elevated in early stages of type 2 diabetes but recently was found to be increased in acute and chronic pancreatitis in humans. Currently, there are little data about feline amylin propensity to fibrillate and no information on circulating levels of this hormone during feline pancreatitis. We compared 4 amylin analogues and found cat amylin to be more prone to amyloid fibrillation than human amylin, the triple-proline analogue pramlintide and rat amylin. We also measured plasma amylin levels in healthy lean cats, diabetic cats, and cats with pancreatitis. Plasma amylin was higher in diabetic cats compared with healthy lean cats (P < 0.001). Interestingly, amylin levels during pancreatitis were higher than those of both lean cats (P < 0.0001) and diabetic cats without pancreatitis (P < 0.005). These data support evidence of feline amylin being more prone to aggregation than human amylin in vitro, which may influence diabetes mellitus progression and β-cell failure in vivo. Furthermore, our data show an increase in amylin levels during feline pancreatitis and the need for future research on the role of this hormone in the pathogenesis of pancreatic inflammation associated to feline diabetes mellitus.
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Affiliation(s)
- L Jotha-Mattos
- Faculdade de Farmácia, Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bss24, Ilha do Fundão, 21941-902 Rio de Janeiro, RJ, Brazil
| | - A B Vieira
- Biomedical Department, Ross University School of Veterinary Medicine, PO Box 334, Basseterre, St. Kitts, West Indies.
| | - M da S M Castelo
- Universidade Federal Fluminense (UFF), Faculdade de Veterinária, R. Vital Brazil Filho, 64 - Santa Rosa, Niterói, RJ 24230-340, Brazil
| | - A S de M Queiroz
- Universidade Federal Fluminense (UFF), Faculdade de Veterinária, R. Vital Brazil Filho, 64 - Santa Rosa, Niterói, RJ 24230-340, Brazil
| | - H J M de Souza
- Escola de Medicina Veterinária, Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropédica, RJ, Brazil
| | - N X de Alencar
- Universidade Federal Fluminense (UFF), Faculdade de Veterinária, R. Vital Brazil Filho, 64 - Santa Rosa, Niterói, RJ 24230-340, Brazil
| | - L M T R Lima
- Faculdade de Farmácia, Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bss24, Ilha do Fundão, 21941-902 Rio de Janeiro, RJ, Brazil; Laboratory for Macromolecules, (LAMAC-DIMAV), National Institute for Metrology, Quality and Technology - INMETRO, Rio de Janeiro, Brazil.
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Mignaco JA, Lima LMTR, Rosenthal A, Foguel D, Silva JL. Highlights of the 3rd International Conference on High Pressure Bioscience and Biotechnology. Braz J Med Biol Res 2005; 38:1147-55. [PMID: 16082454 DOI: 10.1590/s0100-879x2005000800001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The 3rd International Conference on High Pressure Bioscience and Biotechnology was held in the city of Rio de Janeiro from September 27 to September 30, 2004. The meeting, promoted by the International Association of High Pressure Bioscience and Biotechnology (IAHPBB), congregated top scientists and researchers from all over the world. In common, they shared the use of hydrostatic pressure for research, technical development, or industrial applications. The meeting consisted of invited lectures, contributed papers and a well-attended poster session. Very exciting discussions were held inside and outside the sessions, and the goals of discussing state-of-the-art data and establishing working collaborations and co-operations were fully attained.
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Affiliation(s)
- J A Mignaco
- Instituto de Bioquímica Médica, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Brasil
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