Chromogranins and the Quantum Release of Catecholamines

  • Leandro Castañeyra
  • Michelle Juan-Bandini
  • Natalia Domínguez
  • José David Machado
  • Ricardo BorgesEmail author
Part of the UNIPA Springer Series book series (USS)


Chromogranins (Cgs) are the most abundant intravesicular proteins of chromaffin granules. Using Cgs knockout mice, we found that the lack of chromogranin A (CgA), chromogranin B (CgB) or both drastically reduce the vesicular content of catecholamines (CA), impair its accumulation in granules and largely affect the kinetics of exocytosis. Conversely, the overexpression of CgA induces the genesis of vesicles, increases their quantal content and even transforms non-secretory in cells capable to secrete substances. We conclude that Cgs contribute to a highly efficient system that directly mediates monoamine accumulation and regulates the exocytotic process.


Amperometry Intracellular electrochemistry HEK293 L-DOPA Patch-amperometry PC12 





Chromogranin A


Chromogranins A and B


Chromogranin B






Large dense core vesicle


Secretogranin II


Vesicular mono-amine transporter


Vesicular nucleotide transporter


Wild type animals



LC is the recipient of a fellowship from the Fundación CajaCanarias. This work is partially funded by the grant BFU2013-45253-P from the MINECO (Spain) to RB and JDM.


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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Leandro Castañeyra
    • 1
  • Michelle Juan-Bandini
    • 1
  • Natalia Domínguez
    • 1
    • 2
  • José David Machado
    • 1
  • Ricardo Borges
    • 1
    Email author
  1. 1.Unidad de FarmacologíaFacultad de Medicina, Universidad de La LagunaTenerifeSpain
  2. 2.VU Medical Center, Clinical GeneticsAmsterdamNetherlands

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