Browsing by Subject "Biofluids"

Now showing 1 - 4 of 4
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    Measurement of urea and creatinine in saliva of dogs: a pilot study
    ( BioMed Central , 2018-07-20) Tvarijonaviciute, Asta; Pardo Marín, Luis; Tecles Vicente, Fernando; Carrillo Sánchez, J. D.; García Martínez, Juan Diego; Bernal Gambín, Luis Jesús; Pastor, Josep; Cerón Madrigal, José Joaquín; Martínez Subiela, Silvia; Medicina y Cirugía Animal
    Background: Urea and creatinine in saliva have been reported to be possible markers of chronic kidney disease (CKD) in humans. The aim of this study was to assess if urea and creatinine could be measured in canine saliva, and to evaluate their possible changes in situations of CKD. Results: The spectrophotometric assays for urea and creatinine measurements in saliva of dogs showed intra- and inter-assay imprecision lower than 12% and coefficients of correlation close to 1 in linearity under dilution tests. Healthy dogs showed median salivary concentrations of urea of 39.6 mg/dL and creatinine of 0.30 mg/dL, whereas dogs with CKD showed median salivary urea of 270.1 mg/dL and creatinine of 1.86 mg/dL. Positive high correlations were found between saliva and serum activities of the two analytes (urea, r = 0.909; P < 0.001; creatinine, r = 0.819; P < 0.001). Conclusions: Urea and creatinine concentrations can be measured in canine saliva with commercially available spectrophotometric assays. Both analytes showed higher values in saliva of dogs with CKD compared with healthy dogs and their values were highly correlated with those in serum in our study conditions.
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    MicroRNA in prostate cancer: Practical aspects
    (Universidad de Murcia. Departamento de Biología Celular e Histología, 2015) Patil, Pallavi A.; Magi-Galluzzi, Cristina
    In the last decade, microRNAs (miRNAs) have emerged as biomarkers for cancer diagnosis, prognosis, therapy and prediction of treatment response and have earned a promising role in prostate cancer (PCa) management. A plethora of studies have been conducted on miRNA expression in PCa compared to non-neoplastic prostatic tissue, in PCa of different histologic grades and pathologic stages, in castration resistance prostate cancer (CRPC), in metastatic disease and in response to therapy, with evidence pointing towards distinctive miRNAs differentially expressed in each of these phases. In addition to tissue, MiRNA can be detected in blood, serum, and urine. The aim of this review is to survey studies conducted on human prostate tissue and biofluids and to consolidate trustworthy data on the role of miRNA in the occurrence and progression of PCa, with a delineation of differentially expressed miRNAs and an analysis of their association with PCa prognosis, progression to CRPC and metastatic disease, as well as their correlation with response to chemotherapy and hormonal therapy. Changes in circulating miRNAs may represent potentially useful non-invasive biomarkers for PCa diagnosis, staging and prediction of outcome.
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    Sperm proteome after interaction with reproductive fluids in porcine: from the ejaculation to the fertilization site
    (MDPI, 2020-08-22) Luongo, Chiara; Gónzalez-Brusi, Leopoldo; García-Vázquez, Francisco Alberto; Cots Rodríguez, Paula; Izquierdo Rico, María José; Avilés Sánchez, Manuel; Biología Celular e Histología
    Ejaculated sperm are exposed to different environments before encountering the oocyte. However, how the sperm proteome changes during this transit remains unsolved. This study aimed to identify proteomic changes in boar sperm after incubation with male (seminal plasma, SP) and/or female (uterine fluid, UF; and oviductal fluid, OF) reproductive fluids. The following experimental groups were analyzed: (1) SP: sperm + 20% SP; 2) UF: sperm + 20% UF; 3) OF: sperm + 20% OF; 4) SP + UF: sperm + 20% SP + 20% UF; and (5) SP+OF: sperm + 20% SP + 20% OF. The proteome analysis, performed by HPLC-MS/MS, allowed the identification of 265 proteins. A total of 69 proteins were detected in the UF, SP, and SP + UF groups, and 102 proteins in the OF, SP, and SP + OF groups. Our results showed a higher number of proteins when sperm were incubated with only one fluid than when they were co-incubated with two fluids. Additionally, the number of sperm-interacting proteins from the UF group was lower than the OF group. In conclusion, the interaction of sperm with reproductive fluids alters its proteome. The description of sperm-interacting proteins in porcine species after co-incubation with male and/or female reproductive fluids may be useful to understand sperm transport, selection, capacitation, or fertilization phenomena.
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    Utilidad de las proteínas de fase aguda en el líquido cefalorraquídeo canino para el diagnóstico de la me-ningoencefalomielitis de origen desconocido
    (Universidad de Murcia. Servicio de publicaciones, 2024) Verdú Serrano, María Elena; Muñoz Prieto, Alberto; Mateo Pampliega, Isidro; García Martínez, Juan Diego
    El sistema inmunitario facilita la defensa de los seres vivos, que se desencadena a través de la respuesta de fase aguda, generándose las proteínas de fase aguda. Estas proteínas, medidas en suero, resultan de utilidad. El uso de biomarcadores para el diagnóstico precoz de enfermedades inflamatorias del sistema nervioso central (SNC), está en auge en medicina humana. En el caso de las meningoencefalomielitis de origen desconocido (MOD), no hay estudios con una información relevante que sea capaz de solventar el gran inconveniente de no poder obtener un diagnóstico definitivo, que no sea de manera postmortem. La medición de proteínas de fase aguda, como la proteína C reactiva (CRP) y la haptoglobina en el líquido cefalorraquídeo (LCR) podría ayudar a solventar este problema. El objetivo de esta investigación es valorar si estas proteínas se pueden detectar en el LCR, mediante un analizador bioquímico automatizado y estudiar la existencia de alteraciones DOI: 10.6018/analesvet.562071 en animales con MOD. Para ello, los animales incluidos en el estudio se dividieron en un grupo control, com-puesto por perros sin MOD y un grupo problema, subdividido en perros con MOD y perros con MOD tratados con corticoides. Para la medición de estos parámetros se utilizó el analizador Olympus AU600®. Para realizar el estudio comparativo entre grupos se aplicó la prueba no paramétrica de Kruskal-Wallis, seguido del test de Dunn para comparaciones múltiples. La CRP no mostró variaciones estadísticamente significativas, mientras que la haptoglobina no se pudo detectar en el LCR, por lo que se debería valorar su medición con técnicas más sensibles que permitan su cuantificación.