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Wyświetlanie 1-7 z 7
Tytuł:
Naturalne i syntetyczne laktony o aktywności przeciwnowotworowej i przeciwdrobnoustrojowej
Natural and synthetic lactones with anticancer and antimicrobial activity
Autorzy:
Mazur, M.
Powiązania:
https://bibliotekanauki.pl/articles/171876.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
laktony aktywne biologicznie
laktony seskwiterpenowe
aktywność przeciwnowotworowa
aktywność przeciwdrobnoustrojowa
biologically active lactones
sesquiterpene lactones
anticancer activity
antimicrobial activity
Opis:
Medicine is one of the most developing branches of knowledge. But even now there are still some diseases which are impossible to cure. Different cancers, antibiotic resistant bacterial infections and fungal pathogenesis infections are still everlasting problems. Thus, two ways of solutions are proposed. First is the return to natural medicines. From the ancient times plants have been used in medicine and the natural products have been an important source of drugs. Nowadays isolation and identification of these compounds, together with the determination of their biological activity, also play an important role. Lactones are the cyclic esters with a wide range of carbon atoms in a lactone ring. They are a very interesting group of compounds which reveal a wide spectrum of biological activity. Terpenoid, especially sesquiterpene lactones and coumarin derivatives, are found in plants of the Asteraceae and Apiaceae families as well as in many others organisms. The naturally occurring lactones often possess anti-inflamatory [1, 2], phytotoxic [3, 4], antiprotozoal [5], and antiviral activities [6]. They are also well known for their anticancer [7, 8] and antimicrobial activities [9, 10]. The second way of obtaining new biologically active lactones is the chemical synthesis of new potent structural analogs of natural bioactive compounds. However, the complexity of natural products and their derivatives may lead to limited supplies, especially when they have the chiral centers which are one of the most important factors influencing their biological activity. It also causes difficulties to determine the mechanism of action. For those reasons, structural simplification plays an important role in the development of analog design. This review is focused on novel literature data about synthetic and natural lactones which reveal anticancer, antibacterial and antifungal activities. Presented compounds show potent biological activity and high selectivity with holding promises for further applications.
Źródło:
Wiadomości Chemiczne; 2011, 65, 1-2; 135-149
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Izoksazolidynowe analogi nukleozydów
Isoxazolidine analogues of nucleosides
Autorzy:
Kokosza, K.
Piotrowska, D. G.
Powiązania:
https://bibliotekanauki.pl/articles/171674.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
1,3-dipolarna cykloaddycja
nitrony
izoksazolidyny
analogi nukleozydów
nukleozasady
C-nukleozydy
homonukleozydy
nukleozydy
fosfonylowane nukleozydy
psiko-nukleozydy
aktywność przeciwwirusowa
aktywność przeciwnowotworowa
1,3-dipolar cycloaddition
nitrones
isoxazolidines
nucleoside analogues
nucleobases
C-nucleosides
homonucleosides
nucleosides
phosphonylated nucleosides
psico-nucleosides
antiviral activity
anticancer activity
Opis:
Compounds having isoxazolidine moiety are of special interest since they show a broad spectrum of biological activity, including anticancer [1–5], antiviral [6], antibacterial [7–9] and antifungal activities [9–12]. Extensive studies on isoxazolidine moiety containing compounds resulted in discovery of several potentially antiviral and anticancer drugs (e.g. pyridemine-A 1 [2, 3], as well as isoxazolidines substituted with thymine and 5-fluorouracil 52a (AdT) [38–40] and 59 [(–)-AdFU] [41–43], respectively). In this review the most spectacular examples of the synthesis of isoxazolidine analogues of nucleosides are discussed and their biological activity is emphasized.
Źródło:
Wiadomości Chemiczne; 2012, 66, 11-12; 1041-1070
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pochodne 1,2,3-triazolu. Potencjalne leki?
Derivatives of 1,2,3-triazole. Potential drugs?
Autorzy:
Bankowska, E.
Wróblewski, A. E.
Powiązania:
https://bibliotekanauki.pl/articles/171634.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
pochodne 1,2,3-triazolu
aktywność przeciwbakteryjna
aktywność przeciwgrzybicza
aktywność przeciwgruźlicza
aktywność przeciwpsychotyczna
aktywność przeciwdrgawkowa
aktywność przeciwzapalna
aktywność hipoglikemiczna
aktywność przeciwnowotworowa
aktywność przeciwwirusowa
1,2,3-triazole derivatives
antibacterial activity
antifungal activity
antitubercular activity
antipsychotic activity
anticonvulsant activity
anti-inflammatory activity
hypoglycemic activity
anticancer activity
antiviral activity
Opis:
Recently, 1,2,3-triazoles have gained an increased attention in the field of drug discovery because several derivatives have already been marketed as medications (e.g. tazobactam, cefatrizine, rufinamide) [1, 2] and many of them appeared to be very active in diverse biological studies including plinambulin 69 currently in the last stage of the clinical trials [60]. In this review very recent investigations of antibacterial, antitubercular, antifungal, antipsychotic, antiepileptic, anti-inflammatory, hypoglycemic, anticancer and antiviral properties of 1,2,3-triazole derivatives are discussed. These studies allowed to select several compounds which were found to be more active in comparison to the already used drugs.
Źródło:
Wiadomości Chemiczne; 2012, 66, 11-12; 993-1022
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura, właściwości i przykłady zastosowań syntetycznych substancji słodzących
Structure, properties, and examples of applying synthetic sweeteners
Autorzy:
Swierczek, U.
Borowiecka, A.
Feder-Kubis, J.
Powiązania:
https://bibliotekanauki.pl/articles/828171.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Technologów Żywności
Tematy:
dodatki do zywnosci
substancje slodzace
wlasciwosci fizykochemiczne
stabilnosc chemiczna
smak slodki
srodki slodzace syntetyczne
aktywnosc przeciwnowotworowa
Źródło:
Żywność Nauka Technologia Jakość; 2016, 23, 4
1425-6959
Pojawia się w:
Żywność Nauka Technologia Jakość
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synteza i aktywność biologiczna pochodnych salinomycyny
Synthesis and biological activity of salinomycin derivatives
Autorzy:
Antoszczak, M.
Huczyński, A.
Brzezinski, B.
Powiązania:
https://bibliotekanauki.pl/articles/171728.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
antybiotyki jonoforowe
jonofory
struktura molekularna
aktywność przeciwbakteryjna
aktywność przeciwnowotworowa
ionophore antibiotics
ionophores
molecular structure
antibacterial activity
anticancer activity
Opis:
Polyether ionophore antibiotics (ionophores) represent a large group of naturally- occurring lipid-soluble compounds isolated from actinomycetes strains of Streptomyces genus. Ionophores are able to form complexes with the metal cations, especially sodium and potassium, and transport them across the lipid membranes according to electroneutral or electrogenic transport mechanism. This process disturbs the intercellular Na+/K+ concentration gradient and intracellular pH, leads to the mitochondrial injuries, cell swelling, vacuolization and finally to programmed cell death (apoptosis). For this reason, ionophore antibiotics found commercial use in veterinary medicine as coccidiostatic agents and non-hormonal growth promoters. In addition to the industrial use of ionophores, some of them effectively and selectively inhibit properties of different cancer cells as well as enhance the anti-cancer effects of radio- and/or chemotherapy. In this group, particularly interesting is salinomycin because of its potent anti-microbial and anti-cancer activity, including efficiency against multi-drug resistant cancer cells and cancer stem cells. A very interesting direction of research is the chemical modification of ionophore antibiotics, which can lead to obtaining various derivatives with better biological activity and lower toxicity than those of the starting substances. Because biological activity of ionophore antibiotics and their derivatives is strictly connected with the ability to form characteristic pseudocyclic structures around the complexed cations (host-guest complex), it is also important to establish the detailed information on these structures. In this context, our review article is focused on the possible role of salinomycin and its derivatives in anti-microbial as well as anti-cancer therapy, and gives an overview of the properties of this antibiotic.
Źródło:
Wiadomości Chemiczne; 2017, 71, 7-8; 629-661
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biokoniugaty antybiotykow jonoforowych : cele, strategie syntezy i właściwości
Bioconjugates of ionophore antibiotics : goals, synthesis strategies and properties
Autorzy:
Antoszczak, M.
Kordylas, M.
Huczyński, A.
Powiązania:
https://bibliotekanauki.pl/articles/172178.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
antybiotyki jonoforowe
jonofory
biokoniugacja
hybrydy
aktywność przeciwbakteryjna
aktywność przeciwnowotworowa
ionophore antibiotics
ionophores
bioconjugation
hybrids
antibacterial
activity
anticancer activity
Opis:
Polyether ionophore antibiotics (ionophores) represent a large group of naturally- occurring lipophilic compounds which are able to form complexes with the metal cations and transport them across the lipid membranes. This process disturbs the intercellular Na+/K+ concentration gradient and intracellular pH, and leads to the mitochondrial damages, cell swelling, vacuolization and finally to apoptosis process. For this reason, ionophores are commonly used in veterinary medicine as the non-hormonal growth-promoting as well as coccidiostatic agents. In this group particularly interesting are monensin and salinomycin (Fig. 1) because of their proved anti-tumour activity, including efficiency against multidrug- -resistant cancer cells and cancer stem cells of different origin. Improved synthetic derivatives of both polyether ionophores are thus of considerable current interest. Selective derivatization of these structures whose display multiple reactive functional groups and, in the case of salinomycin, a sensitive tricyclic spiroketal ring system is however non-trivial. Even so, semi-synthetic analogs reported to date includes i.a. selective derivatization of the carboxyl group, the three hydroxyl groups, the ketone group, the alkene, and epimerization of the characteristic tricyclic salinomycin unit (for more details see: M. Antoszczak, A. Huczyński, B. Brzezinski, Wiad. Chem., 2017, 71, 629). On the other hand, as part of the original program to develop innovatory anti- -cancer pro-drugs and prompted by the idea that cancer cells may be individually effectively killed by monensin and salinomycin, a very interesting direction of research is bioconjugation of these ionophores. In this context, our review article is focused on the possible role of hybrids of both ionophore antibiotics with other biologically active substances (natural amino acids, Cinchona alkaloids, flavonoids, nucleosides) in anti-bacterial and anti-cancer treatment, and gives an overview of their properties.
Źródło:
Wiadomości Chemiczne; 2018, 72, 1-2; 1-28
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
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
    Wyświetlanie 1-7 z 7

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