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1.
Rev. esp. patol. torac ; 24(3): 272-278, jul.-sept. 2012. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-106180

RESUMO

Objetivo: Se diseña un estudio con el objetivo de valorar el papel de la proteómica en la identificación de proteínas diferenciales en pacientes con SAHS. Pacientes y métodos: Fueron incluidos 37 enfermos con sintomatología sugestiva de SAHS y un IAH ≥ 5 y un grupo control compuesto por 18 sujetos roncadores, emparejados por IMC, género y edad con el grupo con SAHS en los que se descartó un SAHS (IAH < 5). En ambos grupos se excluyeron a los sujetos que estaban diagnosticados de enfermedad crónica avanzada. En primer lugar se efectuó electroforesis bidimensional que comparó los geles de ambos grupos y estableció los spots diferenciales (sobreexpresión > 2,5 veces el grupo control y subexpresión < 0,5 veces por debajo del grupo control). Posteriormente se realizó espectrometría de masas mediante MALDI /TOF-TOF (matrix laser assisted desorption- time of flight).Resultados: Respecto al grupo control, IAH = 3,5 (3-4,1), en los enfermos con SAHS, IAH = 53 (27-74), mediante MALDI/TOF-TOF se identificó una proteína sobreexpresada, la haptoglobina que se ha relacionado con mayor riesgo vascular en pacientes con SAHS. Igualmente se identificaron dos proteínas subexpresadas, la albúmina y serotransferrina, proteínas que pueden facilitar una disminución de las defensas antioxidantes en el SAHS. Conclusiones: Se aporta el primer perfil proteómico diferencial en pacientes adultos con SAHS. Se demuestra la validez de la proteómica para identificar un conjunto de proteínas diferenciales que puedan ser útiles para el diagnóstico o para establecer un perfil de riesgo vascular (AU)


Objective: a study was designed to assess the role of proteomics in the identification of differential proteins in patient with obstructive sleep apnea-hypopnea syndrome (OSAH). Patients and methods: Thirty seven patients with symptoms suggestive of OSAH and a apnea-hypopnea index (AHI) ≥ 5 were included in the study, and a control group was made up of 18 snorers, matched for BMI, gender and age with the OSAH group in which one OSAH was discarded (AHI < 5). Subjects diagnosed with advanced chronic disease were excluded from both groups. First, two-dimensional electrophoresis was performed, which compared the gels of both groups and established the differential spots (over-expression > 2.5 times the control group and under-expression < 0.5 times below the control group). Subsequently, a mass spectrometry was performed by means of MALDI / TOF-TOF (matrix laser assisted desorption - time of flight). Results: Regarding the control group, mean AHI = was 3.5 (3-4.1), and in those affected with OSAH it was, AHI = 53 (27-74). , Aan over-expressed protein, haptoglobin, was identified by means of MALDI/TOF-TOF, which has been related with a greater vascular risk in patient with OSAH. Likewise, two under-expressed proteins, albumin and serotransferrin, were identified, proteins that can facilitate a decrease of the anti-oxidant defences in OSAH. Conclusions: An initial differential proteomic profile in mature patients with OSAH was found. The legitimacy of proteomics to identify a group of differential proteins that could be useful to diagnosis or establish a profile of vascular risk has been demonstrated (AU)


Assuntos
Humanos , Proteômica/métodos , Apneia Obstrutiva do Sono/fisiopatologia , Eletroforese em Gel Diferencial Bidimensional/métodos , Espectrometria de Massas/métodos , Antígenos de Diferenciação/isolamento & purificação , Antioxidantes , Fatores de Risco
2.
Rev. esp. patol. torac ; 24(2): 178-183, abr.-jun. 2012. tab, ilus
Artigo em Espanhol | IBECS | ID: ibc-123960

RESUMO

Introducción: El síndrome de apneas-hipopneas del sueño (SAHS) es una enfermedad frecuente y asociada a morbimortalidad en estadios graves. Se postula que el SAHS puede tener una expresión proteíca diferencial respecto a un grupo de pacientes sin SAHS. Se diseña un trabajo para determinar si un estudio proteómico es capaz de identificar proteínas sobreexpresadas en enfermos con SAHS leve. Métodos: A los sujetos se les realizó una historia clínica, exploración física, bioquímica general, polisomnografía diagnóstica y estudio proteómico mediante iTRAQ (isobaric tags for relative and absolute quantification). Se incluyeron 11 pacientes con SAHS, índice de apneas-hipopneas (IAH) ≥ 5, cuyos resultados fueron comparados con un grupo sin SAHS (IAH < 5). Fueron excluidos aquellos con SapO2 ≤ 93% y enfermedad grave de órgano. Resultados: los pacientes presentaron un índice de apneashipopneas de 12 ± 3 y una edad media de 44 ± 7 años. En el SAHS se observaron 3 proteínas sobreexpresadas (ratio > 1.3) respecto al grupo control. Estas proteínas fueron la PRO0684 (gi-6855601), la immunoglobulina lambda de cadena corta VLJ (gi-21669561) y el kininogeno HMW precursor (gi-68785). Las principales funciones y procesos biológicos en los que están involucrados son la inflamación, respuesta inmune y coagulación. Conclusiones: Respecto a un grupo control, en los pacientes con SAHS se observan proteínas sobreexpresadas. Estas proteínas pueden ser de ayuda para el diagnóstico o para aumentar el conocimiento en procesos fisiopatológicos subyacentes. No obstante, son datos preliminares, cuyo alcance debe establecerse en estudios posteriores (AU)


Introduction: The apnea-hypopnea sleep syndrome (AHSS) is a frequent illness, associated to morbidity and mortality in its most serious stages. It has been postulated that AHSS may have a differential protein expression with regards to a group of patients without AHSS. A study has been designed to determine whether or not a proteomic study is able to identify the overly expressed proteins in patients with minor AHSS. Method: Full clinical background was noted for the subjects, as well as physical examination, general biochemical tests, diagnostic polysomnography and proteomic study using iTRAQ (isobaric tags for relative and absolute quantification). Included in the study were 11 patients with AHSS, an apnea-hypopnea index (AHI) ≥ 5, whose results were compared to a control group without AHSS (AHI < 5). Those with SapO2 ≤ 93% and serious organ disease were excluded. Results: the patients presented an apnea-hypoapnea index of 12 ± 3 and an average age of 44 ± 7 years. In AHSS, 3 overly expressed proteins were observed (ratio > 1.3) with regards to the control group. These proteins were PRO0684 (gi-6855601), short immunoglobulin lambda chain VLJ (gi-21669561) and the kininogen HMW precursor (gi-68785). The main functions and biological processes include inflammation, immune response and coagulation. Conclusions: With regards to the control group, patients with AHSS showed overly expressed proteins. These proteins may be helpful in the diagnosis or in increasing knowledge about underlying physical-pathological processes. Nevertheless, this data is preliminary, with scope of which must establish future studies (AU)


Assuntos
Humanos , Masculino , Feminino , Adulto , Apneia Obstrutiva do Sono , Proteômica , Conformação Proteica , Apneia Obstrutiva do Sono/classificação , Apneia Obstrutiva do Sono/metabolismo
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