Cited by 414Cellular transport and secretionPancreatic function and diabetesCalcium signaling and nucleotide metabolism

Chromogranin A, an "on/off" switch controlling dense-core secretory granule biogenesis

Open access
Kim, Taeyoon, Tao-Cheng, Jung-Hwa, Eiden, Lee E., Loh, Y.Peng·2001·Cell

Abstract

We present evidence that regulation of dense-core secretory granule biogenesis and hormone secretion in endocrine cells is dependent on chromogranin A (CGA). Downregulation of CGA expression in a neuroendocrine cell line, PC12, by antisense RNAs led to profound loss of dense-core secretory granules, impairment of regulated secretion of a transfected prohormone, and reduction of secretory granule proteins. Transfection of bovine CGA into a CGA-deficient PC12 clone rescued the regulated secretory phenotype. Stable transfection of CGA into a CGA-deficient pituitary cell line, 6T3, lacking a regulated secretory pathway, restored regulated secretion. Overexpression of CGA induced dense-core granules, immunoreactive for CGA, in nonendocrine fibroblast CV-1 cells. We conclude that CGA is an "on/off" switch that alone is sufficient to drive dense-core secretory granule biogenesis and hormone sequestration in endocrine cells.

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Crossref · 10.1016/s0092-8674(01)00459-7

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Authors
Kim, T., Tao-Cheng, J.-H., Eiden, L. E., & Loh, Y. P.
Affiliations
National Institutes of Health (US)
Corresponding author
Loh, Y.Peng
Venue
Cell
Publisher
Elsevier BV
Published
2001-08
Volume
106
Issue
4
Pages
499-509
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2069225280
Cited by
414
References
30
Citations by year
2026: 6 · 2025: 8 · 2024: 4 · 2023: 9 · 2022: 8 · 2021: 13 · 2020: 9 · 2019: 9 · 2018: 12 · 2017: 17 · 2016: 5 · 2015: 19 · 2014: 13 · 2013: 16 · 2012: 19
FWCI
10.10
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
chromogranin A, secretory granule biogenesis, regulated secretion, hormone secretion, endocrine cells, neuroendocrine cells, PC12 cells, pituitary cells, antisense RNA knockdown
MeSH terms
Animals, Cattle, Chromogranins, Fibroblasts, Immunohistochemistry, Pro-Opiomelanocortin, Transfection, Immunoblotting, RNA, Antisense, PC12 Cells, Secretory Vesicles, Mice, Rats, Chromogranin A

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