Cited by 53Cellular transport and secretionPancreatic function and diabetesNeuroscience and Neuropharmacology Research

Impact of chromogranin a deficiency on catecholamine storage, catecholamine granule morphology and chromaffin cell energy metabolism in vivo

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Pasqua, Teresa, Mahata, Sumana, Bandyopadhyay, Gautam K., Biswas, Angshuman, Perkins, Guy A., Sinha-Hikim, Amiya P., Goldstein, David S., Eiden, Lee E. +1 more·2016·Cell and Tissue Research

Abstract

Chromogranin A (CgA) is a prohormone and granulogenic factor in neuroendocrine tissues with a regulated secretory pathway. The impact of CgA depletion on secretory granule formation has been previously demonstrated in cell culture. However, studies linking the structural effects of CgA deficiency with secretory performance and cell metabolism in the adrenomedullary chromaffin cells in vivo have not previously been reported. Adrenomedullary content of the secreted adrenal catecholamines norepinephrine (NE) and epinephrine (EPI) was decreased 30-40 % in Chga-KO mice. Quantification of NE and EPI-storing dense core (DC) vesicles (DCV) revealed decreased DCV numbers in chromaffin cells in Chga-KO mice. For both cell types, the DCV diameter in Chga-KO mice was less (100-200 nm) than in WT mice (200-350 nm). The volume density of the vesicle and vesicle number was also lower in Chga-KO mice. Chga-KO mice showed an ~47 % increase in DCV/DC ratio, implying vesicle swelling due to increased osmotically active free catecholamines. Upon challenge with 2 U/kg insulin, there was a diminution in adrenomedullary EPI, no change in NE and a very large increase in the EPI and NE precursor dopamine (DA), consistent with increased catecholamine biosynthesis during prolonged secretion. We found dilated mitochondrial cristae, endoplasmic reticulum and Golgi complex, as well as increased synaptic mitochondria, synaptic vesicles and glycogen granules in Chga-KO mice compared to WT mice, suggesting that decreased granulogenesis and catecholamine storage in CgA-deficient mouse adrenal medulla is compensated by increased VMAT-dependent catecholamine update into storage vesicles, at the expense of enhanced energy expenditure by the chromaffin cell.

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Authors
Pasqua, T., Mahata, S., Bandyopadhyay, G. K., Biswas, A., Perkins, G. A., Sinha-Hikim, A. P., Goldstein, D. S., Eiden, L. E., & Mahata, S. K.
Affiliations
  • University of California San Diego (US)
  • California Institute of Technology (US)
  • National Institutes of Health (US)
Corresponding author
  • Mahata, Sumana
  • Mahata, Sushil K.
Venue
Cell and Tissue Research
Published
2015-11-16
Volume
363
Issue
3
Pages
693-712
ISSN
  • 0302-766X (ISSN-L)
  • 1432-0878
OpenAlex
W2173900167
Cited by
53
References
85
Citations by year
2026: 4 · 2025: 3 · 2024: 2 · 2023: 7 · 2022: 5 · 2021: 6 · 2020: 5 · 2019: 7 · 2018: 5 · 2017: 4 · 2016: 5
FWCI
2.49
Type
journal article
Language
en
Open access
Locations
  • Cell and Tissue Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion)
  • Archive of Doctoral Theses and Digital Collections (University of Calabria) (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (P41GM103412)
  • National Institute of Neurological Disorders and Stroke (ZIANS003033)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
chromogranin A, catecholamine storage, chromaffin cells, adrenal medulla, dense core vesicles, catecholamine synthesis, norepinephrine, epinephrine, dopamine, mitochondrial cristae, energy metabolism, volumetric modulated arc therapy, regulated secretion
MeSH terms
Adrenal Glands, Animals, Catecholamines, Chromaffin Granules, Dopamine, Endocytosis, Endoplasmic Reticulum, Energy Metabolism, Epinephrine, Exocytosis, Glucose, Glycogen, Golgi Apparatus, Humans, Insulin, Mice, Inbred C57BL, Mitochondria, Norepinephrine, Splanchnic Nerves, Synaptic Vesicles, Blotting, Western, Mice, Knockout, Chromogranin A

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