10521-07-0Relevant articles and documents
A Fluorescence-Lifetime-Based Binding Assay for Class IIa Histone Deacetylases
Meyners, Christian,Mertens, Monique,Wessig, Pablo,Meyer-Almes, Franz-Josef
, p. 3107 - 3116 (2017)
Class IIa histone deacetylases (HDACs) show extremely low enzymatic activity and no commonly accepted endogenous substrate is known today. Increasing evidence suggests that these enzymes exert their effect rather through molecular recognition of acetylated proteins and recruiting other proteins like HDAC3 to the desired target location. Accordingly, class IIa HDACs like bromodomains have been suggested to act as “Readers” of acetyl marks, whereas enzymatically active HDACs of class I or IIb are called “Erasers” to highlight their capability to remove acetyl groups from acetylated histones or other proteins. Small-molecule ligands of class IIa histone deacetylases (HDACs) have gained tremendous attention during the last decade and have been suggested as pharmaceutical targets in several indication areas such as cancer, Huntington's disease and muscular atrophy. Up to now, only enzyme activity assays with artificial chemically activated trifluoroacetylated substrates are in use for the identification and characterization of new active compounds against class IIa HDACs. Here, we describe the first binding assay for this class of HDAC enzymes that involves a simple mix-and-measure procedure and an extraordinarily robust fluorescence lifetime readout based on [1,3]dioxolo[4,5-f]benzodioxole-based ligand probes. The principle of the assay is generic and can also be transferred to class I HDAC8.
Synthesis, Antiproliferative Activity, and Effect on Carcinoma A549 Cell Microtubules of New Tubuloclustin Analogs
Zefirov,Evteeva, Yu. A.,Fatkulin,Schulz,Kuznetsov,Zefirova
, p. 423 - 428 (2019)
Combretastatin analogs of the antitumor agent tubuloclustin {N-[7-(adamant-2-yloxy)-7-oxoheptanoyl]-Ndeacetylcolchicine} were prepared via esterification of combretastatin by monoesters of pimelic or adipic acid with adamantan-2-ol or (adamantan-1-yl)methanol. These conjugates were stable and cytotoxic to human lung carcinoma A549 cells (EC50 ≈ 50 – 70 nM) and caused depolymerization of microtubules and slight clustering of tubulin. Tubuloclustin analogs with shortened linkers were prepared via amidation by N-deacetylcolchicine of monoesters of adipic or succinic acids with adamantan-1-ol or (adamantan-1-yl)methanol. The conjugate N-[6-(adamantyl)-6-oxohexanoyl]-N-deacetylcolchicine was more active (EC50 ≈ 4 nM) than tubuloclustin and promoted strong tubulin clusterization. All compounds induced apoptosis of A549 cells. Tests in vivo of N-[6-(adamantyl)-6-oxoheaxnoyl]-N-deacetylcolchicine on carcinoma A549 experimental models were concluded to be promising.
Molecular umbrella as a nanocarrier for antifungals
Skwarecki, Andrzej S.,Martynow, Dorota,Milewska, Maria J.,Milewski, S?awomir
, (2021/09/20)
A molecular umbrella composed of two O‐sulfated cholic acid residues was applied for the construction of conjugates with cispentacin, containing a “trimethyl lock” (TML) or o‐dithiobenzylcarbamoyl moiety as a cleavable linker. Three out of five conjugates
Unified Synthesis of Polycyclic Alkaloids by Complementary Carbonyl Activation**
Christmann, Mathias,He, Guoli,List, Benjamin
supporting information, p. 13591 - 13596 (2021/05/07)
A complementary dual carbonyl activation strategy for the synthesis of polycyclic alkaloids has been developed. Successful applications include the synthesis of tetracyclic alkaloids harmalanine and harmalacinine, pentacyclic indoloquinolizidine alkaloid nortetoyobyrine, and octacyclic β-carboline alkaloid peganumine A. The latter synthesis features a protecting-group-free assembly and an asymmetric disulfonimide-catalyzed cyclization. Furthermore, formal syntheses of hirsutine, deplancheine, 10-desbromoarborescidine A, and oxindole alkaloids rhynchophylline and isorhynchophylline have been achieved. Finally, a concise synthesis of berberine alkaloid ilicifoline B was completed.
Design, synthesis, and biological evaluation of HDAC degraders with CRBN E3 ligase ligands
Li, Jia,Lu, Wei,Lu, Yingxin,Shao, Yingying,Su, Mingbo,Sun, Danwen,Xiao, Donghuai,Zhou, Yubo,Zhu, Shulei
, (2021/12/02)
Histone deacetylases (HDACs) play important roles in cell growth, cell differentiation, cell apoptosis, and many other cellular processes. The inhibition of different classes of HDACs has been shown to be closely related to the therapy of cancers and other diseases. In this study, a series of novel CRBN-recruiting HDAC PROTACs were designed and synthesized by linking hydroxamic acid and benzamide with lenalidomide, pomalidomide, and CC-220 through linkers of different lengths and types. One of these PROTACs, denoted 21a, with a new benzyl alcohol linker, exhibited comparably excellent HDAC inhibition activity on different HDAC classes, acceptable degradative activity, and even better in vitro anti-proliferative activities on the MM.1S cell line compared with SAHA. Moreover, we report for the first time the benzyl alcohol linker, which could also offer the potential to be used to develop more types of potent PROTACs for targeting more proteins of interest (POI).
A Potent Isoprenylcysteine Carboxylmethyltransferase (ICMT) Inhibitor Improves Survival in Ras-Driven Acute Myeloid Leukemia
Marín-Ramos, Nagore I.,Balabasquer, Moisés,Ortega-Nogales, Francisco J.,Torrecillas, Iván R.,Gil-Ordó?ez, Ana,Marcos-Ramiro, Beatriz,Aguilar-Garrido, Pedro,Cushman, Ian,Romero, Antonio,Medrano, Francisco J.,Gajate, Consuelo,Mollinedo, Faustino,Philips, Mark R.,Campillo, Mercedes,Gallardo, Miguel,Martín-Fontecha, Mar,López-Rodríguez, María L.,Ortega-Gutiérrez, Silvia
supporting information, p. 6035 - 6046 (2019/08/02)
Blockade of Ras activity by inhibiting its post-translational methylation catalyzed by isoprenylcysteine carboxylmethyltransferase (ICMT) has been suggested as a promising antitumor strategy. However, the paucity of inhibitors has precluded the clinical validation of this approach. In this work we report a potent ICMT inhibitor, compound 3 [UCM-1336, IC50 = 2 μM], which is selective against the other enzymes involved in the post-translational modifications of Ras. Compound 3 significantly impairs the membrane association of the four Ras isoforms, leading to a decrease of Ras activity and to inhibition of Ras downstream signaling pathways. In addition, it induces cell death in a variety of Ras-mutated tumor cell lines and increases survival in an in vivo model of acute myeloid leukemia. Because ICMT inhibition impairs the activity of the four Ras isoforms regardless of its activating mutation, compound 3 surmounts many of the common limitations of available Ras inhibitors described so far. In addition, these results validate ICMT as a valuable target for the treatment of Ras-driven tumors.
4-Biphenylalanine- and 3-Phenyltyrosine-Derived Hydroxamic Acids as Inhibitors of the JumonjiC-Domain-Containing Histone Demethylase KDM4A
Morera, Ludovica,Roatsch, Martin,Fürst, Michael C. D.,Hoffmann, Inga,Senger, Johanna,Hau, Mirjam,Franz, Henriette,Schüle, Roland,Heinrich, Markus R.,Jung, Manfred
, p. 2063 - 2083 (2016/10/22)
Overexpression of the histone lysine demethylase KDM4A, which regulates H3K9 and H3K36 methylation states, has been related to the pathology of several human cancers. We found that a previously reported hydroxamate-based histone deacetylase (HDAC) inhibitor (SW55) was also able to weakly inhibit this demethylase with an IC50value of 25.4 μm. Herein we report the synthesis and biochemical evaluations, with two orthogonal in vitro assays, of a series of derivatives of this lead structure. With extensive chemical modifications on the lead structure, also by exploiting the versatility of the radical arylation with aryldiazonium salts, we were able to increase the potency of the derivatives against KDM4A to the low-micromolar range and, more importantly, to obtain demethylase selectivity with respect to HDACs. Cell-permeable derivatives clearly showed a demethylase-inhibition-dependent antiproliferative effect against HL-60 human promyelocytic leukemia cells.
A unified synthesis of cyclic ethers or lactones via Pd-catalyzed intramolecular O-functionalization of sp3C[sbnd]H bonds
Wang, Haifeng,Niu, Youhong,Zhang, Guoying,Ye, Xin-Shan
supporting information, p. 4544 - 4548 (2016/09/23)
A general approach for the synthesis of lactones or cyclic ethers via Pd-catalyzed C(sp3)[sbnd]H activation and intramolecular C[sbnd]O functionalization starting from carboxylic acids or alcohols using the bidentate directing group has been de
Cobalt-bisoxazoline-catalyzed asymmetric kumada cross-coupling of racemic α-bromo esters with aryl grignard reagents
Mao, Jianyou,Liu, Feipeng,Wang, Min,Wu, Lin,Zheng, Bing,Liu, Shangzhong,Zhong, Jiangchun,Bian, Qinghua,Walsh, Patrick J.
, p. 17662 - 17668 (2015/02/02)
The first cobalt-catalyzed asymmetric Kumada cross-coupling with high enantioselectivity has been developed. The reaction affords a unique strategy for the enantioselective arylation of α-bromo esters catalyzed by a cobalt-bisoxazoline complex. A variety of chiral α-arylalkanoic esters were prepared in excellent enantioselectivity and yield (up to 97% ee and 96% yield). The arylated products were transformed into α-arylcarboxylic acids and primary alcohols without erosion of ee. The new enantioenriched α-arylpropionic esters synthesized herein are potentially useful in the development of nonsteroidal anti-inflammatory drugs. This method was conducted on gram-scale and applied to the synthesis of highly enantioenriched (S)-fenoprofen and (S)-ar-turmerone.
Structure-activity relationship of a new series of reversible dual monoacylglycerol lipase/fatty acid amide hydrolase inhibitors
Cisneros, José A.,Bj?rklund, Emmelie,González-Gil, Inés,Hu, Yanling,Canales, ángeles,Medrano, Francisco J.,Romero, Antonio,Ortega-Gutiérrez, Silvia,Fowler, Christopher J.,López-Rodríguez, María L.
supporting information; experimental part, p. 824 - 836 (2012/04/10)
The two endocannabinoids, anandamide (AEA) and 2-arachidonoylglycerol (2-AG), play independent and nonredundant roles in the body. This makes the development of both selective and dual inhibitors of their inactivation an important priority. In this work we report a new series of inhibitors of monoacylglycerol lipase (MAGL) and fatty acid amide hydrolase (FAAH). Among them, (±)-oxiran-2-ylmethyl 6-(1,1′-biphenyl-4-yl)hexanoate (8) and (2R)-(-)-oxiran-2-ylmethyl(4-benzylphenyl)acetate (30) stand out as potent inhibitors of human recombinant MAGL (IC50 (8) = 4.1 μM; IC 50 (30) = 2.4 μM), rat brain monoacylglycerol hydrolysis (IC 50 (8) = 1.8 μM; IC50 (30) = 0.68 μM), and rat brain FAAH (IC50 (8) = 5.1 μM; IC50 (30) = 0.29 μM). Importantly, and in contrast to the other previously described MAGL inhibitors, these compounds behave as reversible inhibitors either of competitive (8) or noncompetitive nature (30). Hence, they could be useful to explore the therapeutic potential of reversible MAGL inhibitors.
