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>Journals >Cirugía y Cirujanos >Year 2009, Issue 6

Manjarrez-Gutiérrez G, Camacho-Calderón N, Mercado-Camargo R, Boyzo-Montes OA, Arvizu-Flores A, Hernández-Rodríguez J
Caracterización de células serotoninérgicas en el tejido cardiaco fetal
Cir Cir 2009; 77 (6)

Language: Español
References: 34
Page: 423-429
PDF: 179.70 Kb.

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Background: We undertook this study to present biochemical and morphological characterization of serotonergic cells during fetal heart development. Methods: Wistar rats (10, 12, 16 and 20 days of gestation) were used. After obtaining the fetuses by cesarean section, the hearts were removed and fixed for immunohistochemical assay of tryptophan-5-hydroxylase (Tph), in addition to Western blot for enzyme. Serotonin concentration and Tph activity were also evaluated with high-performance liquid chromatography. Results were analyzed using Mann-Whitney U test with a significance level of p ‹0.05. Results: Metachromatic cells immunoreactive for Tph were observed from day 10 of gestation. Nerve fibers were also labeled, apparently making contact with serotonergic cells. Tph activity was measurable and serotonin levels increased with gestational age. The presence of Tph protein was confirmed by Western blot on day 16. Conclusions: The present results support the existence of cells located in the fetal myocardium, capable of producing serotonin, whose phenotype belongs to cardiac mast cells. Their presence in this tissue strongly suggests that serotonin may play a key role in normal and abnormal development of cardiac tissue.

Key words: Fetal heart, serotonin, tryptophan-5-hydroxylase, serotoninergic cells.


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>Journals >Cirugía y Cirujanos >Year 2009, Issue 6

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