José F Ek Vitorín

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Phosphorylation of connexins is an important mechanism regulating gap junction channels. However, the role(s) of connexin (Cx) phosphorylation in vivo are largely unknown. Here, we showed by mass spectrometry that Ser-395 in the C terminus of chicken Cx50 was phosphorylated in the lens. Ser-395 is located within a PKA consensus site. Analyses of Cx50(More)
Expression of connexin 40 (Cx40) and Cx43 in cardiovascular tissues varies as a function of age, injury, and development with unknown consequences on the selectivity of junctional communication and its acute regulation. We investigated the PKC-dependent regulation of charge selectivity in junctions composed of Cx43, Cx40, or both by simultaneous assessment(More)
Separate connexin domains partake in proposed gating mechanisms of gap junction channels. The amino-terminus (NT) domains, which contribute to voltage sensing, may line the channel's cytoplasmic-facing funnel surface, stabilize the channel's overall structure through interactions with the transmembrane domains and each other, and integrate to form a(More)
BACKGROUND Varying strategies are currently being evaluated to develop tissue-engineered constructs for the treatment of ischemic heart disease. This study examines an angiogenic and biodegradable cardiac construct seeded with neonatal cardiomyocytes for the treatment of chronic heart failure (CHF). METHODS We evaluated a neonatal cardiomyocyte(More)
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