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La esfingomielinasa ácida es un guardián de la arquitectura y función del laberinto placentario

Isidora Rovic^1,2, Katherine Szelag^1,2, Han Li²

¹Department of Physiology, Temerty Faculty of Medicine, University of Toronto, Canada.

Development (Cambridge, England)

|September 1, 2025

Resumen

La deficiencia de esfingomielinasas ácidas (Smpd1) en ratones afecta el desarrollo de la placenta, causando restricción del crecimiento intrauterino. Esto está relacionado con anormalidades de la placenta y deterioro de la autofagia, reduciendo el intercambio de nutrientes entre la madre y el feto.

Área de la Ciencia:

Biología celular
Biología del desarrollo
La bioquímica

Sus antecedentes:

Los esfingolipidos son moléculas de señalización vitales que regulan las funciones celulares.
La deficiencia de esfingomielinasas ácidas (ASM) está relacionada con problemas de la placenta.
ASM es una enzima en la vía metabólica de los esfingolipidos.

Objetivo del estudio:

Investigar el papel de ASM (Smpd1) en el desarrollo de la placenta en ratones.
Determinar las consecuencias de la deficiencia de Smpd1 en el crecimiento fetal.
Para aclarar los mecanismos subyacentes de la disfunción placentaria.

Principales métodos:

Se utilizó un modelo de ratón con deficiencia de Smpd1 (Smpd1-/-).
Analizó la anatomía placentaria y los parámetros de crecimiento fetal.
Marcadores examinados de la autofagia y la función lisosómica.
Realizó experimentos de transferencia de embriones.

Principales resultados:

La deficiencia de Smpd1 causó restricción del crecimiento intrauterino en ratones.
Smpd1-/- las placentas mostraron defectos anatómicos, incluyendo reducción del espacio laberíntico.
Se observaron autofagia defectuosa y deterioro lisosomal en las placentas Smpd1-/-.
La transferencia de embriones no salvó la restricción del crecimiento fetal.

Conclusiones:

Smpd1 es esencial para el desarrollo normal de la placenta y el crecimiento fetal.
El intercambio placentario reducido debido a defectos anatómicos limita el suministro de nutrientes.
El deterioro de la autofagia y la función lisosómica contribuye a la disfunción del trofoblasto.
La deficiencia de Smpd1 conduce a la restricción del crecimiento intrauterino a través de la insuficiencia placentaria.

Palabras clave:

Esfingomielinasas ácidas Los lisosomas Los fosfolípidos La colocación Diferenciación de los trofoblastos

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