2020
DOI: 10.3390/molecules25245962
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How to Separate Kinase Inhibition from Undesired Monoamine Oxidase A Inhibition—The Development of the DYRK1A Inhibitor AnnH75 from the Alkaloid Harmine

Abstract: The β-carboline alkaloid harmine is a potent DYRK1A inhibitor, but suffers from undesired potent inhibition of MAO-A, which strongly limits its application. We synthesized more than 60 analogues of harmine, either by direct modification of the alkaloid or by de novo synthesis of β-carboline and related scaffolds aimed at learning about structure–activity relationships for inhibition of both DYRK1A and MAO-A, with the ultimate goal of separating desired DYRK1A inhibition from undesired MAO-A inhibition. Based o… Show more

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Cited by 12 publications
(11 citation statements)
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“… DYRK and CLK inhibitors. A few representative pharmacological inhibitors: AnnH75 [ 51 ], EGCG [ 255 ], EHT-1610 [ 55 ], Harmine [ 256 ], INDY [ 44 ], Leucettine L41 [ 43 , 257 ], Lorecivivint [ 258 , 259 ], GNF4877 [ 170 , 179 ], MU1210 [ 68 ], and TCMDC-135051 [ 251 , 252 ]. Numbers under each structure indicates IC50 values (expressed in µM) towards DYRK1A, CLK1, and GSK3β (33PanQinase™ assay, Reaction Biology Corp.).…”
Section: Figurementioning
confidence: 99%
“… DYRK and CLK inhibitors. A few representative pharmacological inhibitors: AnnH75 [ 51 ], EGCG [ 255 ], EHT-1610 [ 55 ], Harmine [ 256 ], INDY [ 44 ], Leucettine L41 [ 43 , 257 ], Lorecivivint [ 258 , 259 ], GNF4877 [ 170 , 179 ], MU1210 [ 68 ], and TCMDC-135051 [ 251 , 252 ]. Numbers under each structure indicates IC50 values (expressed in µM) towards DYRK1A, CLK1, and GSK3β (33PanQinase™ assay, Reaction Biology Corp.).…”
Section: Figurementioning
confidence: 99%
“…In order to distinguish these two activities and to explore whether one of them is responsible for the effect of harmine on FOXO shuttling, we used specific chemical probes. Recently, distinctive changes at N-9 and C-1 have been introduced into the harmine molecule, resulting in AnnH75, a compound that preserves DYRK1A inhibition and eliminates MAO-A inhibition ( 16 ). We exposed U2foxRELOC cells to equal concentrations of harmine and AnnH75.…”
Section: Resultsmentioning
confidence: 99%
“…Rapamycin was purchased from LC Laboratories (Woburn, MA, USA); dihydroethidium, hydroxyurea, and phenformin hydrochloride were obtained from Sigma (St. Louis, MO, USA); and leptomycin B (LMB) was purchased from Alomone Labs (Jerusalem, Israel). AnnH75 was developed and synthesized in the Bracher Lab (Ludwig-Maximilians University, Munich, Germany) ( 16 ).…”
Section: Methodsmentioning
confidence: 99%
“…Although harmine is a potent DYRK1A inhibitor, it also targets other DYRKs and monoamine oxidase (MAO-A), resulting in side effects that limit its therapeutic potential ( 102 ). To overcome this limitation, several derivatives of harmine are being synthesized that are more selective for DYRK1A ( 103 , 104 ).…”
Section: Introductionmentioning
confidence: 99%