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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Assessing melatonin and its oxidative metabolites amounts in biological fluid and culture medium by liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS)

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Autor(es):
Coelho, Mirela B. [1] ; Rodrigues-Cunha, Maria Carolina [2] ; Ferreira, Christina R. [1] ; Cabral, Elaine C. [1] ; Nogueira, Guilherme P. [3] ; Eberlin, Marcos N. [1] ; Leal, Claudia L. V. [2] ; Simas, Rosineide C. [1, 3]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Univ Campinas UNICAMP, Inst Chem, ThoMSon Mass Spectrometry Lab, Campinas, SP - Brazil
[2] Univ Sao Paulo, Fac Anim Sci & Food Engn FZEA, Pirassununga, SP - Brazil
[3] Sao Paulo State Univ UNESP, Fac Vet Med, DAPSA, Aracatuba, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: ANALYTICAL METHODS; v. 5, n. 24, p. 6911-6918, 2013.
Citações Web of Science: 2
Resumo

The introduction of precise analytical technologies in the biological area is needed to increase the knowledge of the fundamental processes occurring in the animal and human domain. The objective of this study was to develop a highly sensitive and selective method based on liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) using electrospray ionization for the simultaneous detection and quantification of melatonin (MEL) and its metabolites, 6-hydroxymelatonin (6-HMEL), N-2-acetyl-N-1-formyl-5-methoxykynuramine (AFMK) and N-1-acetyl-5-metoxykynuramine (AMK). Using this methodology, we have studied the role of melatonin and its metabolites in the mammalian embryo in vitro production system, which is fundamental due to the antioxidant and signaling roles of these compounds. Samples comprised of bovine follicular fluid (FF) and tissue culture medium (TCM 199). The optimized procedure uses liquid-liquid extraction with MS monitoring via selective reaction monitoring (SRM). Low limits of detection/quantification were obtained, 3/10 pg mL(-1) for MEL, AFMK and AMK and 30/100 pg mL(-1) for 6-HMEL, respectively using deuterated melatonin (MEL-d(4)) as the internal standard (IS). Validation and correlation coefficients were higher than 0.999 and recoveries were 80-108%. Precision was evaluated as repeatability and intermediate precision with relative standard deviation values <3.55%. The method has been successfully applied to the analysis of pooled FF and TCM 199 samples and results suggest that MEL and its metabolites are involved in oocyte maturation and that their proper quantitation is essential to monitor and study their role in such a process. (AU)

Processo FAPESP: 12/20843-0 - O papel da melatonina exógena no meio de maturação in vitro de oócitos bovino e suíno: determinação e quantificação dos principais metabólitos por espectrometria de massas
Beneficiário:Mirela Batista Coelho
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 10/18023-9 - Maturação de oócitos bovinos: a influência de diferentes vias de sinalização
Beneficiário:Cláudia Lima Verde Leal
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 10/51677-2 - Técnicas modernas em espectrometria de massas e desenvolvimento de novas aplicações em ciências: química, bioquímica, materiais, forense, medicina, alimentos, farmácia e veterinária
Beneficiário:Marcos Nogueira Eberlin
Linha de fomento: Auxílio à Pesquisa - Temático