Recent Updates in Curcumin Pyrazole and Isoxazole Derivatives: Synthesis and Biological Application

Although scanning electron microscopy has a great potential in biological application, there are certain limitations in visualization of the biological structure. Satisfactory techniques to demonstrate natural surfaces of the tissue and the cell have been reported by several investigators. However, it is commonly found that the surface cell membrane is covered with a minute amount of mucin, secretory substance or tissue fluid as physiological, pathological or artefactual condition. These substances give a false surface appearance, especially when the tissue is fixed with strong fixatives. It seems important to remove these coating substances from the surface of the cell for demonstration of the true structure.

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A Peptoid with Extended Shape in Water

10.26434/chemrxiv.7552139 ◽

2019 ◽

Author(s):

Jumpei Morimoto ◽

Yasuhiro Fukuda ◽

Takumu Watanabe ◽

Daisuke Kuroda ◽

Kouhei Tsumoto ◽

...

Keyword(s):

Spectroscopic Analysis ◽

Dimensional Space ◽

Three Dimensional ◽

Biomolecular Recognition ◽

Biological Application ◽

New Class ◽

Proteolytic Resistance ◽

Pharmacokinetic Properties ◽

Optically Pure ◽

Three Dimensional Space

<div> <div> <div> <p>“Peptoids” was proposed, over decades ago, as a term describing analogs of peptides that exhibit better physicochemical and pharmacokinetic properties than peptides. Oligo-(N-substituted glycines) (oligo-NSG) was previously proposed as a peptoid due to its high proteolytic resistance and membrane permeability. However, oligo-NSG is conformationally flexible and is difficult to achieve a defined shape in water. This conformational flexibility is severely limiting biological application of oligo-NSG. Here, we propose oligo-(N-substituted alanines) (oligo-NSA) as a new peptoid that forms a defined shape in water. A synthetic method established in this study enabled the first isolation and conformational study of optically pure oligo-NSA. Computational simulations, crystallographic studies and spectroscopic analysis demonstrated the well-defined extended shape of oligo-NSA realized by backbone steric effects. The new class of peptoid achieves the constrained conformation without any assistance of N-substituents and serves as an ideal scaffold for displaying functional groups in well-defined three-dimensional space, which leads to effective biomolecular recognition. </p> </div> </div> </div>

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Non-biological application of DNA molecules

Biomics ◽

10.31301/2221-6197.bmcs.2019-28 ◽

2019 ◽

Vol 11 (3) ◽

pp. 344-377

Author(s):

A.R. Sakhabutdinova ◽

K.I. Mikhailenko ◽

R.R. Garafutdinov ◽

O.Yu. Kiryanova ◽

M.A. Sagitova ◽

...

Keyword(s):

Biological Application ◽

Dna Molecules

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Medicinal and Biological Significance of Phenoxazine Derivatives

Mini-Reviews in Medicinal Chemistry ◽

10.2174/1389557520666201214102151 ◽

2020 ◽

Vol 20 ◽

Author(s):

Jaya Dwivedi ◽

Neetu Yaduvanshi ◽

Shruti Shukla ◽

Sonika Jain

Keyword(s):

Drug Resistance ◽

Biological Significance ◽

Biological Application ◽

Pharmacological Activities ◽

Resistance Reversal ◽

Anti Inflammatory ◽

Pharmacological Application

: Since 1887, phenoxazine derivatives have attracted attention of chemist due to its versatile utility, industrially and pharmacologically. Literature is found abundant with various pharmacological activities of phenoxazine derivatives like antitumor, anticancer, antifungal, antibacterial, anti-inflammatory, anti-diabetic, anti-viral, anti-malarial, antidepressant, analgesic and many other drug resistance reversal activities. This review covers detailed over-view on pharmacological application of phenoxazine nucleus, its chemistry and reactivity and also illustrating the incorporation of different group at different positions enhancing its biological application, besides some synthetic procedures.

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Design, Synthesis and Biological Evaluation of 3-(3,4,5-Trimethoxyphenyl)- 5-(2-(5-arylbenzo[b]thiophen-3-yl)oxazol-5-yl)isoxazole Derivatives as Anticancer Agents

Letters in Organic Chemistry ◽

10.2174/1570178616666191004105445 ◽

2020 ◽

Vol 17 (5) ◽

pp. 345-351

Author(s):

Syndla Premalatha ◽

G. Rambabu ◽

Islavathu Hatti ◽

Dittakavi Ramachandran

Keyword(s):

Breast Cancer ◽

Anticancer Activity ◽

Cell Lines ◽

Cancer Cell ◽

Human Cancer ◽

Cancer Cell Lines ◽

Biological Evaluation ◽

Human Cancer Cell ◽

Human Cancer Cell Lines ◽

Isoxazole Derivatives

A new series of 3-(3,4,5-trimethoxyphenyl)-5-(2-(5-arylbenzo[b]thiophen-3-yl)oxa zol-5- yl)isoxazole derivatives were designed and synthesized. All these derivatives were evaluated for their anticancer activity against various human cancer cell lines such as MCF-7 (breast cancer), A549 (lung cancer), DU-145 (prostate cancer) and MDA MB-231 (breast cancer)-four human cancer cell lines by using MTT assay. Here, etoposide was used as a standard reference drug and most of the compounds were exhibited good anticancer activity with respect to cell lines. Among all compounds, five compounds 11b, 11c, 11f, 11i and 11j showed more potent activity than standard drug, in which, compound 11f was the most promising compound.

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