Discovery of 3-Arylcoumarin-tetracyclic Tacrine Hybrids as Multifunctional Agents against Parkinson’s Disease
摘要:
A series of multifunctional directed 3-arylcoumarin-tetracyclic tacrine derivatives was designed and synthesized for the treatment of Parkinson's disease (PD). A number of derivatives (18, 19, 20, 21, and 24) demonstrated significant reduction of aggregation of "human" alphasynuclein (a-synuclein) protein, expressing on transgenic Caenorhabditis elegans (C. elegans) model NL5901. Moreover, compounds 16, 18, and 24 also exhibited good antioxidant properties and significantly increased the dopamine (DA) content in N2 and NL5901 strains of C. elegans. Interestingly, the protective efficacy of these hybrids seems to be mediated via activation of longevity promoting transcription factor DAF-16. In addition, molecular modeling studies have evidenced the exquisite interaction of most active compounds 18 and 24 with asynuclein protein. Taken together, the data indicate that the derivatives may be useful leads against aging and age associated PD.
indole-chalcone based benzopyran compounds on cancer cells. One molecule called compound 27 showed a notable preference for inhibition of hLigI as compared to other ligases and showed enhanced cytotoxicity against colon cancer (DLD-1) cells as compared to normal cells. Mechanistic studies showed that compound 27 directly interacts with hLigI in a competitive manner and did not interact with the DNA substrate
Out of three promising compounds, 6l and 6o significantly induced apoptosis in MDA-MB-231 cancer cells via mitochondrial depolarisation without affecting normal cells. In an in vitro co-culture model of bone metastasis, we investigated the ability of coumarin–imidazo[1,2-a]pyridine hybrids to reverse the negative impact of MDA-MB-231 cancer cells on osteoblast differentiation. The results illustrate
利用银(I)催化的Groebke-Blackburn-Bienayme多组分反应合成了一系列具有重要生物学意义的6-(咪唑并[1,2 - a ]吡啶-2-基)-2 H -chromen-2-one衍生物。通过碱性磷酸酶测定法和茜素红-S染色测定法在原发性颅盖骨成骨细胞中测试了合成的化合物的可能的骨保护特性。此外,通过qPCR测量活性化合物6h,6l和6o对成骨基因BMP2,RUNX2,COL1和OCN表达的影响。在三种有前途的化合物中,每升6升6a和6o通过线粒体去极化显着诱导了MDA-MB-231癌细胞的凋亡,而不影响正常细胞。在体外骨转移共培养模型中,我们研究了香豆素-咪唑并[1,2- a ]吡啶杂化物逆转MDA-MB-231癌细胞对成骨细胞分化的负面影响的能力。结果说明了设计的杂交体重建骨骼稳态的潜力。这些发现证明了新合成的杂种作为先导分子的重要性,既具有抗骨质疏松性又具有抗癌性,可
One-Pot Regioselective Synthesis of Imidazole and 2,3-Dihydroquinazolinone Derivatives - An Easy Access to ‘Nature-Like Molecules'; Part XIII in the Series: ‘Studies on Novel Synthetic Methodologies'
A mild and highly practical regioselectivesynthesis of imidazole and 2,3-dihydroquinazolinone derivatives from 5-alkyl-4-hydroxyisophthalaldehydes with suitable substrates in acetic acid is reported. Further exploration of the molecular diversity of 2,3-dihydroquinazolinone is demonstrated by the synthesis of diverse pharmacologically relevant natural-product-like scaffolds.
Benzofuran-pyran hybrids: A new class of potential bone anabolic agents
作者:Sampa Gupta、Sulekha Adhikary、Ram K. Modukuri、Dharmendra Choudhary、Ritu Trivedi、Koneni V. Sashidhara
DOI:10.1016/j.bmcl.2018.04.041
日期:2018.6
analysis of these compounds on osteoblast cells revealed that compound 22 up-regulated the expression of osteogenic genes RUNX2, BMP-2, COL-1, thus substantiating that compound 22 having two geminalmethylgroups in its R3 position is a potent osteogenic agent. Additionally, compound 22 enhanced the ability of bone marrow stromal cells to differentiate towards osteoblast lineage and therefore can be
rat calvarial osteoblasts in vitro. Among all the compounds screened for the alkaline phosphatase activity, three compounds 4e, 4j and 4k showed potent activity at picomolar concentrations in osteoblast differentiating stimulation. Additionally, these compounds were found effective in mineralization, assessed by alizarinred-S staining assay. Compounds were again validated through a series of other in vitro