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Boswellic acids and their derivatives as potent regulators of glucocorticoid receptor actions.

Abstract：

:Glucocorticoid (GCs) hormones exert their actions via their cognate steroid receptors the Glucocorticoid Receptors (GR), by genomic or non-genomic mechanisms of actions. GCs regulate many cellular functions among them growth, metabolism, immune response and apoptosis. Due to their cell type specific induction of apoptosis GCs are used for the treatment of certain type of cancer. In addition, due to their anti-inflammatory actions, GCs are among the most highly prescribed drug to treat chronic inflammatory disorders, albeit to the many adverse side effects arising by their long term and high doses use. Thus, there is a high need for selective glucocorticoid receptor agonist - modulators (SEGRA- SGRMs) as effective as classic GCs, but with a reduced side effect profile. Boswellic acids (BAs) are triterpenes that show structural similarities with GCs and exhibit anti-inflammatory and anti-cancer activities. In this study we examined whether BA alpha and beta and certain BAs derivatives exert their actions, at least in part, through the regulation of GR activities. Applying docking analysis we found that BAs can bind stably into the deacylcortivazol (DAC) accommodation pocket of GR. Moreover we showed that certain boswellic acids derivatives induce glucocorticoid receptor nuclear translocation, no activation of GRE dependent luciferase gene expression, and suppression of the TNF-α induced NF-κB transcriptional activation in GR positive HeLa and HEK293 cells, but not in low GR level COS-7 cells. Furthermore, certain boswellic acids compounds exert antagonistic effect on the DEX-induced GR transcriptional activation and induce cell type specific mitochondrial dependent apoptosis. Our results indicate that certain BAs are potent selective glucocorticoid receptor regulators and could have great potential for therapeutic use.

journal_name

Arch Biochem Biophys

journal_title

Archives of biochemistry and biophysics

authors

Karra AG,Tziortziou M,Kylindri P,Georgatza D,Gorgogietas VA,Makiou A,Krokida A,Tsialtas I,Kalousi FD,Papadopoulos GE,Papadopoulou KΚ,Psarra AG

doi

10.1016/j.abb.2020.108656

subject

Has Abstract

pub_date

2020-11-30 00:00:00

pages

108656

eissn

0003-9861

issn

1096-0384

pii

S0003-9861(20)30665-2

journal_volume

695

pub_type

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Boswellic acids and their derivatives as potent regulators of glucocorticoid receptor actions.