Cited by 6Stress Responses and CortisolAdrenal Hormones and DisordersHypothalamic control of reproductive hormones

The pulsatility of ACTH secretion in the rat anterior pituitary cell perifusion system

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Deng, Qiong, Zhang, Zeng, Wu, Yong·2017·Cellular Physiology and Biochemistry

Abstract

Aims: This study aimed to examine the physiological mechanism whereby the corticotropin-releasing hormone (CRH) and arginine vasopressin (AVP) exert their influence on adrenocorticotropic hormone (ACTH) secretion in pituitary cells. Methods: Anterior pituitary cells were harvested from male rats and placed in the perifusion system. Cells were perifused with serum-free medium for 6 hours before fraction collection. After 30-minute of baseline collection, perifusion media was changed to expose the cells to CRH with or without AVP. ACTH concentration in each fraction was measured using enzyme immunoassay chemiluminescent kit. Results: The lowest physiological concentration of CRH (10 pM) or AVP (10 pM) was not able to induce a marked increase in ACTH secretion. Higher concentration of CRH (30 pM) or AVP (100 pM) in the physiological range caused sustained elevation of ACTH secretion (P < 0.001), while the secretion remained at similar levels for up to 1 hour with continuous stimulation. Perifusion with 10 pM AVP and 10 pM or 30 pM CRH caused a 2.38-fold and 2.99-fold increase in pulsatile ACTH secretion in pituitary cells, respectively. The duration of pulsatility caused by perifusion with 10 pM AVP and 30 pM CRH was close to that observed under physiological condition. Conclusions: By using the rat anterior pituitary cell perifusion system, we found that CRH and AVP potentiate the effect of each other on ACTH secretion, but AVP was a less potent agonist than CRH. The data suggest that CRH and AVP are essential for the pulsatility of ACTH, and AVP acts like a switch of the pulsatility.

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Crossref · 10.1159/000455984

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Authors
Deng, Q., Zhang, Z., & Wu, Y.
Affiliations
  • Peking University Shenzhen Hospital (CN)
  • Anhui Medical University (CN)
Venue
Cellular Physiology and Biochemistry
Publisher
S. Karger AG
Published
2017
Volume
41
Issue
1
Pages
154-162
ISSN
  • 1015-8987 (ISSN-L)
  • 1421-9778
OpenAlex
W2594337357
Cited by
6
References
39
Citations by year
2025: 1 · 2024: 1 · 2022: 2 · 2021: 1 · 2017: 1
FWCI
0.15
Type
journal article
Language
en
Open access
Locations
  • Cellular Physiology and Biochemistry (publishedVersion, cc-by-nc-nd)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
China Postdoctoral Science Foundation
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
ACTH secretion, pulsatile hormone secretion, corticotropin-releasing factor, vasopressin, anterior pituitary cells

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