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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Endocrine 2021 ; 74 (3): 638-645 Nephropedia Template TP
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Modulation of ACE-2 mRNA by inflammatory cytokines in human thyroid cells: a pilot study #MMPMID34224085
Coperchini F; Ricci G; Croce L; Denegri M; Ruggiero R; Villani L; Magri F; Chiovato L; Rotondi M
Endocrine 2021[Dec]; 74 (3): 638-645 PMID34224085show ga
INTRODUCTION: Angiotensin-converting-enzyme-2 (ACE-2) was demonstrated to be the receptor for cellular entry of SARS-CoV-2. ACE-2 mRNA was identified in several human tissues and recently also in thyroid cells in vitro. PURPOSE: Aim of the present study was to investigate the effect of pro-inflammatory cytokines on the ACE-2 mRNA levels in human thyroid cells in primary cultures. METHODS: Primary thyroid cell cultures were treated with IFN-gamma and TNF-alpha alone or in combination for 24 h. ACE-2 mRNA levels were measured by RT-PCR. As a control, the levels of IFN-gamma inducible chemokine (CXCL10) were measured in the respective cell culture supernatants. RESULTS: The mean levels of ACE-2 mRNA increased after treatment with IFN-gamma and TNF-alpha in all the thyroid cell preparations, while the combination treatment did not consistently synergically increase ACE-2-mRNA. At difference, CXCL10 was consistently increased by IFN-gamma and synergically further increased by the combination treatment with IFN-gamma + TNF-alpha, with respect to IFN-gamma alone. CONCLUSIONS: The results of the present study show that IFN-gamma and, to a lesser extent TNF-alpha consistently increase ACE-2 mRNA levels in NHT primary cultures. More interestingly, the combined stimulation (proven to be effective according to the synergic effect registered for CXCL10) produces different responses in terms of ACE-2 mRNA modulation. These results would suggest that elevated levels of pro-inflammatory cytokines could facilitate the entering of the virus in cells by further increasing ACE-2 expression and/or account for the different degree of severity of SARS-COV-2 infection. This hypothesis deserves to be confirmed by further specific studies.