16582-58-4Relevant academic research and scientific papers
Chemical Genetics Reveals a Role of Squalene Synthase in TGFβ Signaling and Cardiomyogenesis
Takemoto, Yasushi,Kadota, Shin,Minami, Itsunari,Otsuka, Shinya,Okuda, Satoshi,Abo, Masahiro,Punzalan, Louvy Lynn,Shen, Yan,Shiba, Yuji,Uesugi, Motonari
supporting information, p. 21824 - 21831 (2021/08/30)
KY02111 is a widely used small molecule that boosts cardiomyogenesis of the mesoderm cells derived from pluripotent stem cells, yet its molecular mechanism of action remains elusive. The present study resolves the initially perplexing effects of KY02111 on Wnt signaling and subsequently identifies squalene synthase (SQS) as a molecular target of KY02111 and its optimized version, KY-I. By disrupting the interaction of SQS with cardiac ER-membrane protein TMEM43, KY02111 impairs TGFβ signaling, but not Wnt signaling, and thereby recapitulates the clinical mutation of TMEM43 that causes arrhythmogenic right ventricular cardiomyopathy (ARVC), an inherited heart disease that involves a substitution of myocardium with fatty tissue. These findings reveal a heretofore undescribed role of SQS in TGFβ signaling and cardiomyogenesis. KY02111 may find its use in ARVC modeling as well as serve as a chemical tool for studying TGFβ/SMAD signaling.
Benzothiazolyl ureas are low micromolar and uncompetitive inhibitors of 17Β-HSD10 with implications to Alzheimer’s disease treatment
Aitken, Laura,Benek, Ondrej,Chribek, Matej,Dolezal, Rafael,Gunn-Moore, Frank,Hrabinova, Martina,Hroch, Lukas,Jun, Daniel,Kralova, Vendula,Kuca, Kamil,Lycka, Antonin,Musilek, Kamil,Prchal, Lukas,Schmidt, Monika,Vinklarova, Lucie,Zemanova, Lucie
, (2020/03/26)
Human 17β-hydroxysteroid dehydrogenase type 10 is a multifunctional protein involved in many enzymatic and structural processes within mitochondria. This enzyme was suggested to be involved in several neurological diseases, e.g., mental retardation, Parkinson’s disease, or Alzheimer’s disease, in which it was shown to interact with the amyloid-beta peptide. We prepared approximately 60 new compounds based on a benzothiazolyl scaffold and evaluated their inhibitory ability and mechanism of action. The most potent inhibitors contained 3-chloro and 4-hydroxy substitution on the phenyl ring moiety, a small substituent at position 6 on the benzothiazole moiety, and the two moieties were connected via a urea linker (4at, 4bb, and 4bg). These compounds exhibited IC50 values of 1–2 μM and showed an uncompetitive mechanism of action with respect to the substrate, acetoacetyl-CoA. These uncompetitive benzothiazolyl inhibitors of 17β-hydroxysteroid dehydrogenase type 10 are promising compounds for potential drugs for neurodegenerative diseases that warrant further research and development.
ARS-TiO2 photocatalyzed direct functionalization of sp2 C-H bonds toward thiocyanation and cyclization reactions under visible light
Hosseini-Sarvari, Mona,Hosseinpour, Zeinab,Koohgard, Mehdi,Sarvestani, Abdollah Masoudi
, p. 1401 - 1407 (2020/03/26)
An ARS-TiO2 photocatalyst has been prepared, by a simple method through stirring a mixture of ARS and TiO2 at room temperature in the dark, to extend the photocatalytic response of titanium dioxide toward the visible light spectrum. The synergic effect of ARS and TiO2 in the photocatalyst system has catalyzed direct C-H functionalization of sp2 C-H bonds toward thiocyanation and cyclization reactions. Several aromatic and heteroaromatic scaffolds (2-phenylamino-thiazole, phenol, aniline, indole and pyrrole derivatives) were treated with the thiocyanate anion at room temperature. Herein, the first report on thiocyanation of phenol and synthesis of 2-aminobenzothiazole derivatives under visible light is presented.
COMPOSITION FOR PROMOTING CARDIAC DIFFERENTIATION OF PLURIPOTENT STEM CELL COMPRISING EGFR INHIBITOR
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Paragraph 0143, (2016/03/05)
The present invention provides a composition for promoting cardiac differentiation of a pluripotent stem cell containing an EGFR inhibitor. The present invention also provides a kit for promoting cardiac differentiation containing an EGFR inhibitor and a method for inducing cardiac differentiation of a pluripotent stem cell comprising culturing the pluripotent stem cell in a medium containing an EGFR inhibitor.
Chrysin-benzothiazole conjugates as antioxidant and anticancer agents
Mistry, Bhupendra M.,Patel, Rahul V.,Keum, Young-Soo,Kim, Doo Hwan
supporting information, p. 5561 - 5565 (2015/11/17)
7-(4-Bromobutoxy)-5-hydroxy-2-phenyl-4H-chromen-4-one, obtained from chrysin with 1,4-dibromobutane, was combined with a wide range of 6-substituted 2-aminobenzthiazoles, which had been prepared from the corresponding anilines with potassium thiocyanate. Free radical scavenging efficacies of newer analogues were measured using DPPH and ABTS assays, in addition to the assessment of their anticancer activity against cervical cancer cell lines (HeLa and CaSki) and ovarian cancer cell line (SK-OV-3) implementing the SRB assay. Cytotoxicity of titled compounds was checked using Madin-Darby canine kidney (MDCK) non-cancer cell line. Overall, 6a-r indicated remarkable antioxidant power as DPPH and ABTS+ scavengers; particularly the presence of halogen(s) (6g, 6h, 6j-6l) was favourable with IC50 values comparable to the control ascorbic acid. Unsubstituted benzothiazole ring favored the activity of resultant compounds (6a and 6r) against HeLa cell line, whereas presence of chlorine (6g) or a di-fluoro group (6k) was a key to exert strong action against CaSki. Moreover, a mono-fluoro (6j) and a ketonic functionality (6o) were beneficial to display anticipated anticancer effects against ovarian cancer cell line SK-OV-3. The structural assignments of the new products were done on the basis of IR, 1H NMR, 13C NMR spectroscopy and elemental analysis.
In vitro biological investigations of novel piperazine based heterocycles
Chhatriwala, Nirmal M.,Patel, Amit B.,Patel, Rahul V.,Kumari, Premlata
, p. 611 - 616 (2015/02/02)
Eleven N.phenyl- and 11 N.benzothiazolyl-2-(4-(2,3,4-trimethoxybenzyl)piperazin-1-yl)acetamides have been synthesised by a simple and efficient method. The 22 novel compounds were tested for their in vitro biological efficacy against two Grampositive bacteria, three Gram-negative bacteria, two fungi and Mycobacterium tuberculosis H37Rv. The bioassay results revealed that the majority of the N.benzothiazole-substituted piperazine derivatives exhibited moderate to good bioefficacies with encouraging MICs. The influence of the presence or absence of various electron-withdrawing or -donating functional groups on the aryl acetamide moiety on the different bioassay results is discussed.
Access to a new class of biologically active quinoline based 1,2,4-triazoles
Patel, Rahul V.,Park, Se Won
, p. 24 - 30 (2013/12/04)
As an aspect of our ongoing research in search of new antimicrobial armamentarium, a series of 1,2,4-triazol-3-ylthio-acetamides was constructed and in vitro analyzed for their antimicrobial activity against several bacteria and fungi. Aiming to establish an increased potency, the bioassay results were matched to those of 1,3,4-oxadiazoles, utilized previously. Remarkably, 1,2,4-triazoles were found to possess a good spectrum of antifungal potency, which eventually suggested the azole template as an essential pharmacophore to diversify the biological occupations of the attendant molecules. However, it was noticed that the potency of final analogs against each strain placed reliance on the type of substituent present on benzothiazole ring. The structures of final compounds were confirmed with the aid of IR, 1H NMR, 13C NMR spectroscopy and CHN analysis.
Synthesis of coumarin-based 1,3,4-oxadiazol-2ylthio-N-phenyl/benzothiazolyl acetamides as antimicrobial and antituberculosis agents
Patel, Rahul V.,Kumari, Premlata,Rajani, Dhanji P.,Chikhalia, Kishor H.
, p. 195 - 210 (2013/03/13)
In an attempt to find new agents to fight against microbial infections, a series of coumarin-based 1,3,4-oxadiazol-2ylthio-N-phenyl/benzothiazolyl acetamides was synthesized starting from coumarin-3-carboxylic acid ethyl ester obtained through Knoevenagel and Pinner reaction. In vitro antimicrobial activity against several bacteria (S. aureus, B. cereus, E. coli, P. aeruginosa, K. pneumoniae, S. typhi, P. vulgaris, S. flexneri), fungi (A. niger, A. fumigatus, A. clavatus, C. albicans) and antimycobacterial activity against Mycobacterium tuberculosis H37Rv strain was assessed. This study shows to what extent the presence of various electron withdrawing/donating substituents on the phenyl or benzothiazole ring affects the activity profiles of the newer molecules. The relationship between activity profiles (MICs, 3.12-25 μg/mL) and the lipophilic character (LogP) of the prepared products is also discussed and the MIC values of the active conjugates seem to correlate to some extent with the lipophilicity profiles. Two (5e and 6c) of the final analogues displayed promising antimycobacterial activity at 12.5 μg/mL of MIC, half fold potent to the standard drug pyrazinamide (6.25 μg/mL). Compounds were characterized by IR, 1H NMR, 13C NMR spectroscopy and elemental analysis.
New quinolinyl-1,3,4-oxadiazoles: Synthesis, in vitro antibacterial, antifungal and antituberculosis studies
Patel, Rahul V.,Kumari, Premlata,Chikhalia, Kishor H.
, p. 596 - 607 (2013/07/28)
In order to generate hybrid antimicrobial remedies with novel mode of action, two series of quinoline based 1,3,4-oxadiazole derivatives condensed with N-aryl/benzothiazolyl acetamides were synthesized and the MIC values of the compounds towards eight reference bacterial strains (S. aureus, B. cereus, E. coli, P. aeruginosa, K. pneumoniae, S. typhi, P. vulgaris, S. flexneri), four fungi (A. niger, A. fumigatus, A. clavatus, C. albicans) and Mycobacterium tuberculosis H37Rv were assayed in vitro. Quinoline-6-carboxlic acid was treated with thionyl chloride in refluxing methanol to obtain the corresponding ester derivative to be hydrazinolyzed by 99% hydrazine hydrate in ethanol to produce carbohydrazide intermediate. The carbohydrazide precursor underwent cyclization by carbon disulfide and ethanolic KOH to construct 5-quinolinyl-6-yl-1,3,4- oxadiazol-2-thiol. Substituted 2-chloro-N-phenyl(benzothiazolyl)aceta-mide derivatives were then condensed to 1,3,4-oxadiazole nucleus via sulphur linkage to yield the desired products. Target products bearing N-benzothiazolyl-2- chloroacetamides displayed good inhibitory potential. The biological screening identified that many final analogues exhibited a significant inhibition of the growth of microorganisms at 3.12-25 μg/mL of MIC, which were comparable to control drugs. The influence of the presence of various functional groups to the phenyl/benzothiazolyl ring on activity profiles was investigated. The proposed structures of the newly prepared products were confirmed with the aid of IR, 1H NMR, 13C NMR spectroscopy and elemental analysis. These results may provide new insights in the design of a novel pool of bioactive templates.
Synthesis of benzimidazolyl-1,3,4-oxadiazol-2ylthio-N-phenyl (benzothiazolyl) acetamides as antibacterial, antifungal and antituberculosis agents
Patel, Rahul V.,Patel, Paresh K.,Kumari, Premlata,Rajani, Dhanji P.,Chikhalia, Kishor H.
experimental part, p. 41 - 51 (2012/07/30)
To affiliate multiple bioactivities in a compact heteronuclei, two series of benzimidazole based 1,3,4-oxadiazoles were synthesized and assessed in vitro for their efficacy as antimicrobial agents against eight bacteria (Staphylococcus aureus, Bacillus cereus, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, Salmonella typhi, Proteus vulgaris, Shigella flexneri), four fungi (Aspergillus niger, Aspergillus fumigatus, Aspergillus clavatus, Candida albicans) and Mycobacterium tuberculosis H37Rv and best results were observed amongst the N-benzothiazolyl aetamide series. The lipophilicity (LogP) influence on the biological profile (MICs) of the prepared products was also discussed. Upon biological screening, it was observed that the majority of the compounds were found to possess a significant broad spectrum antimicrobial (3.12-25 μg/mL of MIC) and antitubercular (6.25-25 μg/mL of MIC) potential. The structural assignments of the new products were done on the basis of IR, 1H NMR, 13C NMR spectroscopy and elemental analysis.
