Expression of type 1 angiotensin II receptors in human aldosteronomas

R. Sarzani, G. Opocher, P. Dessìfulgheri, V. Paci, G. Cola, S. Rocco, B. Vianello, F. Mantero, A. Rappelli

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Type 1 angiotensin II (AII) receptors (AT1 receptors), besides stimulation of aldosterone secretion, seem to transduce the growth factor-like activity of AII on glomerulosa cells. Although a local renin-angiotensin system and AII synthesis have been found in human adrenals and aldosteronomas, it is unclear whether aldosteronomas express AT1 receptors. Utilizing polymerase chain reaction (PCR) and reverse transcription-PCR (RT-PCR) with primers complementary to both genomic and cDNA sequences of human AT1 receptor, we have amplified and cloned a 734 bp fragment of the AT1 coding region. This DNA, after cloning and sequencing, was used for Northern analysis. Total RNA was extracted from 5 non-tumorous adrenals and 5 aldosteronomas. AT1 mRNA (∼ 2.4 kb) was expressed in all the aldosteronomas tested. Densitometric analysis of AT1 signals, corrected by β actin expression, when compared to non-tumorous adrenals, did not show significant differences. AT1 receptor density and affinity in cell membrane obtained from 9 non-tumorous adrenal cortex and 8 aldosteronomas were also studied. 125I-AII was used as ligand and Dup 753 as AT1 antagonist: AT1 receptor density and affinity were not significantly different in aldosteronomas vs non-tumorous adrenal cortex. In conclusion, the expression of AT1 gene and the formation of an apparently normal receptor suggest that AT1 receptor should have a role in aldosteronoma cell biology.

Original languageEnglish
Pages (from-to)189-195
Number of pages7
JournalEndocrine Research
Volume21
Issue number1-2
DOIs
Publication statusPublished - 1995

Fingerprint

Angiotensin Type 1 Receptor
Angiotensin II
Adrenal Cortex
Polymerase Chain Reaction
Renin-Angiotensin System
Aldosterone
Reverse Transcription
Cell Biology
Actins
Organism Cloning
Intercellular Signaling Peptides and Proteins
Complementary DNA
Cell Membrane
RNA
Ligands
Gene Expression
Messenger RNA
DNA

ASJC Scopus subject areas

  • Endocrinology

Cite this

Expression of type 1 angiotensin II receptors in human aldosteronomas. / Sarzani, R.; Opocher, G.; Dessìfulgheri, P.; Paci, V.; Cola, G.; Rocco, S.; Vianello, B.; Mantero, F.; Rappelli, A.

In: Endocrine Research, Vol. 21, No. 1-2, 1995, p. 189-195.

Research output: Contribution to journalArticle

Sarzani, R, Opocher, G, Dessìfulgheri, P, Paci, V, Cola, G, Rocco, S, Vianello, B, Mantero, F & Rappelli, A 1995, 'Expression of type 1 angiotensin II receptors in human aldosteronomas', Endocrine Research, vol. 21, no. 1-2, pp. 189-195. https://doi.org/10.3109/07435809509030434
Sarzani, R. ; Opocher, G. ; Dessìfulgheri, P. ; Paci, V. ; Cola, G. ; Rocco, S. ; Vianello, B. ; Mantero, F. ; Rappelli, A. / Expression of type 1 angiotensin II receptors in human aldosteronomas. In: Endocrine Research. 1995 ; Vol. 21, No. 1-2. pp. 189-195.
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