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Updated: Sep 9, 2025

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Isolating and Analyzing Cells of the Pancreas Mesenchyme by Flow Cytometry
Published on: January 28, 2017
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Las células α pancreáticas son funcionalmente heterogéneas y están reguladas por las células endocrinas vecinas en
bioRxiv : the preprint server for biology
|September 5, 2025
Resumen
La glucosa y la regulación paracrina de las células alfa muestran diferencias por sexo. Los receptores de insulina y somatostatina ajustan la dinámica del calcio de las células alfa, afectando la secreción de glucagón en enfermedades metabólicas.
Área de la Ciencia:
- Endocrinología
- Biología celular
- Investigación metabólica
Sus antecedentes:
- La regulación de las células alfa (α) por factores de glucosa y paracrina no se entiende completamente, especialmente con respecto a las variaciones basadas en el sexo.
- Investigar la comunicación celular intra-islote es crucial para comprender la homeostasis de la glucosa.
Objetivo del estudio:
- Mapear con precisión la dinámica del calcio (Ca2+) en las células α y las células β y δ vecinas dentro de los islotes pancreáticos.
- Elucidar las funciones de la señalización del receptor de insulina (InsR) y del receptor de somatostatina (SSTR) en la respuesta a la glucosa de las células α y las diferencias específicas por sexo.
Principales métodos:
- Utilizó imágenes avanzadas de calcio en rebanadas pancreáticas de ratones GluCre:GCaMP6f.
- Se realizaron rampas de glucosa (1, 8 - 10, 8 mM) e inhibió selectivamente las vías de señalización InsR y SSTR2/ 3.
Principales resultados:
- Se observaron oscilaciones heterogéneas de Ca2+ en las células α, antifásicas para las células β y inversamente correlacionadas con las células δ.
- La inhibición de InsR y SSTR2/3 condujo a una hiperactividad de las células α y a respuestas alteradas de las células β.
- Se han identificado sensibilidades específicas por sexo de las células α al bloqueo de InsR y SSTR2/3.
Conclusiones:
- La señalización paracrina intra-islet ajusta las respuestas de glucosa de las células α.
- Los mecanismos paracrinos específicos del sexo pueden influir en la secreción de glucagón y contribuir a las enfermedades metabólicas.
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