1. Tear Film Proteome of Healthy Domestic Cats
- Author
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Renata Santiago Alberto Carlos, Paula Elisa Brandão Guedes, Arianne Pontes Oriá, Juliano Oliveira Santana, Carlos Priminho Pirovani, Jéssica Fontes Veloso, Alexandre Dias Munhoz, Luciana Carvalho Lacerda, and Irma Yuliana Mora-Ocampo
- Subjects
0301 basic medicine ,CATS ,General Veterinary ,biology ,Article Subject ,Chemistry ,Veterinary medicine ,Serum albumin ,Lipocalin ,Molecular biology ,Lactotransferrin ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,Secretory protein ,SF600-1100 ,Proteome ,030221 ophthalmology & optometry ,biology.protein ,Protein kinase A ,Polyacrylamide gel electrophoresis ,Research Article - Abstract
The aim of this study was to investigate the proteins found in tear film of healthy domestic cats. Schirmer tear test strips were used to collect tear samples of twelve healthy cats, which were mixed, centrifuged, and placed in a single 1.5 mL microtube that was frozen at −20°C, until analysis by two-dimensional polyacrylamide gel and mass spectrometry associated with high-performance liquid chromatography. The resulting spectra were analyzed and compared with the Swiss-Prot search tool. Forty peptides were detected in the analyzed protein fragments of 90 spots, with 16 proteins identified. Of these, the authors confirmed what has been already found in other studies: lactotransferrin, serum albumin, allergenic lipocalins, and neutrophil gelatinase-associated lipocalin. Others were considered novel in tear film samples of all species: cyclin-dependent protein kinase, serine/arginine repetitive matrix protein, apelin receptor, secretory protein related to C1q/TNF, Wee1, α-1,4 glucan phosphorylase, and WD repeat domain 1. The network was divided into 11 clusters, and a biological function was assigned. Most of the proteins have functions in the defense and maintenance of feline ocular surface homeostasis. Serum albumin is a bottleneck protein, with a high betweenness value. This paper is a pioneer in reporting, in-depth, the tear film proteome of domestic cats.
- Published
- 2021