{"id":290554,"date":"2025-05-27T10:00:57","date_gmt":"2025-05-27T08:00:57","guid":{"rendered":"https:\/\/www.cbm.uam.es\/?p=290554"},"modified":"2025-06-13T11:58:32","modified_gmt":"2025-06-13T09:58:32","slug":"una-enfermedad-metabolica-rara-altera-la-actividad-electrica-del-corazon","status":"publish","type":"post","link":"https:\/\/www.cbm.uam.es\/index.php\/2025\/05\/27\/una-enfermedad-metabolica-rara-altera-la-actividad-electrica-del-corazon\/","title":{"rendered":"Una enfermedad metab\u00f3lica rara altera la actividad el\u00e9ctrica del coraz\u00f3n"},"content":{"rendered":"<p>Investigadores del Centro de Biolog\u00eda Molecular Severo Ochoa (CBM-CSIC-UAM), y de la Universidad Complutense de Madrid (UCM), pertenecientes a los centros CIBERER y CIBERCV, han descubierto que la acidemia propi\u00f3nica, una enfermedad metab\u00f3lica hereditaria rara, produce alteraciones electrofisiol\u00f3gicas en el coraz\u00f3n.<\/p>\n<p>El trabajo, publicado en la revista <em>Journal of Inherited Metabolic Disease<\/em>, demuestra por primera vez que la deficiencia de la enzima propionil-CoA carboxilasa (PCC) provoca modificaciones en ciertas corrientes i\u00f3nicas en cardiomiocitos humanos derivados de c\u00e9lulas madre pluripotentes inducidas, lo que incrementa el riesgo de arritmias card\u00edacas.<\/p>\n<p>La acidemia propi\u00f3nica es una enfermedad metab\u00f3lica hereditaria causada por mutaciones en los genes <em>PCCA<\/em> o <em>PCCB<\/em>, que codifican las subunidades de la enzima mitocondrial PCC. Esta deficiencia impide metabolizar correctamente ciertos amino\u00e1cidos y l\u00edpidos, provocando la acumulaci\u00f3n de compuestos t\u00f3xicos como el propionil-CoA. Estos metabolitos afectan a m\u00faltiples \u00f3rganos, siendo el coraz\u00f3n uno de los m\u00e1s vulnerables.<\/p>\n<p>Aunque se sabe que los pacientes con acidemia propi\u00f3nica pueden desarrollar complicaciones como cardiomiopat\u00eda dilatada, prolongaci\u00f3n del intervalo QT y arritmias ventriculares \u2014potencialmente fatales\u2014, los mecanismos celulares que explican estas alteraciones no estaban bien definidos hasta ahora. \u201cNuestro objetivo era entender c\u00f3mo la deficiencia de PCC afecta a las propiedades el\u00e9ctricas del coraz\u00f3n a nivel celular\u201d, explica la <strong>Dra. Eva Richard<\/strong>, investigadora del CBM y coautora principal del estudio.<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<h3>Cambios en la actividad el\u00e9ctrica y mayor riesgo de arritmias<\/h3>\n<p>Los resultados fueron concluyentes: las c\u00e9lulas derivadas de un paciente con AP mostraron una menor excitabilidad, una prolongaci\u00f3n de la duraci\u00f3n del potencial de acci\u00f3n y la aparici\u00f3n de pospotenciales tard\u00edos, se\u00f1ales caracter\u00edsticas de un entorno proarr\u00edtmico.<\/p>\n<p>Adem\u00e1s, se observaron alteraciones en varias corrientes i\u00f3nicas clave: disminuci\u00f3n de la corriente de sodio y de calcio tipo L, y un aumento de la corriente de sodio tard\u00eda y del intercambiador sodio\/calcio. En conjunto, estos cambios reflejan una disfunci\u00f3n en el manejo intracelular del calcio, un proceso crucial para la contracci\u00f3n card\u00edaca.<\/p>\n<p>\u201cLa novedad del estudio es que estos cambios pueden aparecer de forma independiente a la progresi\u00f3n tard\u00eda de la cardiomiopat\u00eda inducida por la enfermedad, es decir, que la propia deficiencia enzim\u00e1tica genera un entorno proarr\u00edtmico a nivel celular\u201d, destaca el coautor <strong>Dr. Ricardo Caballero<\/strong>, investigador de la UCM.<\/p>\n<p>Este modelo celular humano permite estudiar con precisi\u00f3n los mecanismos fisiopatol\u00f3gicos de la acidemia propi\u00f3nica y explorar nuevas estrategias terap\u00e9uticas. Entre las conclusiones del trabajo, los autores se\u00f1alan que los <strong>betabloqueantes<\/strong> podr\u00edan ser, por su mecanismo de acci\u00f3n, la \u00fanica clase de antiarr\u00edtmicos actualmente recomendada para pacientes con esta enfermedad.<\/p>\n<p>La<strong> Dra. Eva Delp\u00f3n<\/strong>, otra de las firmantes del art\u00edculo, subraya que ser\u00e1 necesario seguir investigando si otros f\u00e1rmacos cardioactivos, como los inhibidores del cotransportador sodio-glucosa tipo 2, entre ellos la empagliflozina y la dapagliflozina, podr\u00edan ofrecer beneficios en este contexto.<\/p>\n<p>\u201cGracias a herramientas punteras como las c\u00e9lulas\u00a0madre pluripotentes inducidas y la electrofisiolog\u00eda celular, estamos empezando a desentra\u00f1ar las bases moleculares de enfermedades raras como la acidemia propi\u00f3nica, con la esperanza de desarrollar tratamientos m\u00e1s eficaces y mejorar la calidad de vida de los pacientes\u201d, concluye la <strong>Dra. Lourdes Ruiz Desviat<\/strong>, tambi\u00e9n coautora del estudio.<\/p>\n<p>Este trabajo ha contado con el apoyo de la Propionic Acidemia Foundation (EE. UU.), la Fundaci\u00f3n Ram\u00f3n Areces, el Ministerio de Ciencia, Innovaci\u00f3n y Universidades, la Comunidad de Madrid y el Instituto de Salud Carlos III.<\/p>\n<p>&nbsp;<\/p>\n<h3><strong><br \/>\n<\/strong>Referencia<\/h3>\n<p>Anabel C\u00e1mara-Checa, Mar \u00c1lvarez, Josu Rap\u00fan, Sara P\u00e9rez-Mart\u00edn, Roberto N\u00fa\u00f1ez-Fern\u00e1ndez, Marcos Rubio-Alarc\u00f3n, Teresa Crespo-Garc\u00eda, Lourdes R. Desviat, Eva Delp\u00f3n, Ricardo Caballero, Eva Richard. <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/jimd.70030\" target=\"_blank\" rel=\"noopener\">Propionic Acidemia-Induced Proarrhythmic Electrophysiological Alterations in Human iPSC-Derived Cardiomyocytes<\/a>. <em>JIMD<\/em>, Volume 48, Issue 3, May 2025.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Investigadores del Centro de Biolog\u00eda Molecular Severo Ochoa (CBM-CSIC-UAM), y de la Universidad Complutense de Madrid (UCM), pertenecientes a los centros CIBERER y CIBERCV, han descubierto que la acidemia propi\u00f3nica, [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":290555,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[44,54],"tags":[],"class_list":["post-290554","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-scientific-article"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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