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Wyszukujesz frazę "chemia click" wg kryterium: Temat


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Tytuł:
Zastosowanie chemii "klik" do syntezy biokoniugatów salinomycyny
Application of the click chemistry for the synthesis of salinomycin bioconjugates
Autorzy:
Sulik, Michał
Antoszczak, Michał
Huczyński, Adam
Powiązania:
https://bibliotekanauki.pl/articles/2200436.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
salinomycyna
jonofory
biokoniugacja
chemia click
aktywność przeciwnowotworowa
chemia klik
salinomycin
ionophores
bioconjugation
click chemistry
anticancer activity
Opis:
Bioconjugation is a well-known method of designing new drug candidates for many different diseases, including cancer. The idea of the process is to join two or more bioactive molecules by means of a covalent bond. Thus, obtained hybrids often exhibit higher efficiency compared to that of the starting compounds. Recently, the use of click chemistry, especially Huisgen 1,3-dipolar cycloaddition, has attracted much attention for the synthesis of bioconjugates of natural compounds. The great advantage of this reaction is its high yield and enzymatic stability of the 1,2,3-triazole ring. Mild conditions of this reaction guarantee that it can be used to modify compounds with low stability, such as salinomycin – a representative of ionophore antibiotics. Salinomycin is a naturally occurring lipophilic compound isolated from Streptomyces albus. It is capable of forming complexes with metal cations and transport them across the lipid membranes. This process disturbs the intercellular Na+ /K+ concentration gradient and leads to apoptosis (programmed cell death). Salinomycin exhibits high anticancer activity, including efficiency against multidrug-resistant cancer cells and cancer stem cells of different origin. Chemical modification of the salinomycin skeleton to increase its biological activity is a very interesting research direction. Our review article is focused on the application of click chemistry for the synthesis of salinomycin bioconjugates with many different biologically active compounds (Cinchona alkaloids, nucleosides, triphenylphosphonium cation, betulinic acid and other ionophore antibiotics). Some of the obtained hybrids exhibit higher efficiency compared to that of the starting compounds, e.g., increased anticancer activity, the ability to overcome multi-drug resistance, or improved ionophoretic properties. These results are a good starting point for further research on the use of click chemistry in the synthesis of highly functional hybrids of natural compounds.
Źródło:
Wiadomości Chemiczne; 2022, 76, 11-12; 883--907
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie reakcji 1,3-dipolarnej cykloaddycji Huisgena do modyfikacji nukleozydów i ligonukleotydów
An application of the Huisgen 1,3-dipolar cycloaddition to modify nukleosides and oligonucleotides
Autorzy:
Radzikowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/171872.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
1,3-dipolarna cykloaddycja
analogi nukleozydów
chemia click
synteza modyfikowanych oligonukleotydów
1,2,3-triazole
biokoniugaty
1,3-dipolar cycloaddition
analogues of nucleosides
click chemistry
synthesis of modified oligonucleotide
bioconjugates
Opis:
The 1,3-dipolar cycloaddition reaction between azides and terminal alkynes, known as the Huisgen reaction, constitutes a powerful tool for the synthesis of versatile molecules containing carbon – heteroatom bond. The use of a copper(I) salt in this reaction allowed Sharpless to develop the concept of „click chemistry” [1]. This strategy is based on reactions between small units characterized by mild reaction conditions, versatility, high yields and stereospecificity. The chemistry of nucleic acids and nucleoside analogues is undergoing rapid developments and numerous compounds from these classes of compounds are used in medicinal treatment. Analogues of nucleoside constitute a class of drugs that possesses either anticancer or/and antiviral activity (against HIV, HSV, VZV or HCV viruses) [3]. Many modified oligonucleotides show biological activity. As potential drugs oligonucleotides are employed in antisense, antigen and aptamer strategies. An antisense therapeutic agent acts on the pathogenic mRNA causing inactivation of the target whereas an antigen agent acts on DNA and aptamer on unwanted protein. It is not surprising that number of research groups are trying to join the concept of click chemistry with nucleic acids chemistry. In this way, it is possible to obtain new molecules like base- or sugar-modified nucleosides, nucleosides, bioconjugates and olignucleotides. The copper-catalyzed 1,3-dipolar cycloaddition CuAAC allows to functionalize DNA, for example by labelling it through attaching small molecules to DNA. Two general strategies have been developed for this purpose: presynthetic and postsynthetic labelling. In the presynthetic method nucleotide monomers are labelled before DNA synthesis and purification. In the postsynthetic strategy DNA containing small reactive groups is synthesized first and then it is conjugated with the desired molecules. CuAAC is also a convenient method for the synthesis of modified oligonucleotides in which phosphodiester linkage is replaced by 1,2,3- -triazole or for a solid phase synthesis. Such molecules appear to be useful in medicine, molecular diagnostic (e.g. fluorescent dyes) or mechanistic molecular model in the future.
Źródło:
Wiadomości Chemiczne; 2011, 65, 3-4; 207-234
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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