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Medicinal Chemistry Research

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https://www.readbyqxmd.com/read/28515623/antibacterial-properties-of-5-substituted-derivatives-of-rhodanine-3-carboxyalkyl-acids
#1
Waldemar Tejchman, Izabela Korona-Glowniak, Anna Malm, Marek Zylewski, Piotr Suder
A series of rhodanine 3-carboxyalkanoic acid derivatives possessing 4'-(N,N-dialkyl-amino or diphenylamino)-benzylidene moiety as a substituent at the C-5 position were synthesised and their antibacterial activity was screened. All the rhodanine derivatives showed bacteriostatic or bactericidal activity to the reference gram-positive bacterial strains, but lack of activity to the reference Gram-negative bacterial strains and yeast strains was observed.
2017: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/28515622/the-influence-of-genistein-on-free-radicals-in-normal-dermal-fibroblasts-and-keloid-fibroblasts-examined-by-epr-spectroscopy
#2
Magdalena Jurzak, Paweł Ramos, Barbara Pilawa
Normal and keloid fibroblasts were examined using X-band (9.3 GHz) electron paramagnetic resonance spectroscopy. The effect of genistein on the concentration of free radicals in both normal dermal and keloid fibroblasts after ultraviolet irradiation was investigated. The highest concentration of free radicals was seen in keloid fibroblasts, with normal fibroblasts containing a lower concentration. The concentration of free radicals in both normal and keloid fibroblasts was altered in a concentration-dependent manner by the presence of genistein...
2017: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/28163562/hydrazide-hydrazones-as-potential-antimicrobial-agents-overview-of-the-literature-since-2010
#3
REVIEW
Łukasz Popiołek
Hydrazide-hydrazone derivatives are present in many bioactive molecules and display a wide variety of biological activities, such as antibacterial, antitubercular, antifungal, anticancer, anti-inflammatory, anticonvulsant, antiviral, and antiprotozoal action. Therefore, many medicinal chemists synthesize various hydrazide-hydrazones and evaluate them for biological activities. Among biological properties of this class of compounds, antimicrobial activity is the most frequently encountered in scientific literature...
2017: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/28111515/cytotoxic-activity-of-genistein-8-c-glucoside-form-lupinus-luteus-l-and-genistein-against-human-sk-ov-3-ovarian-carcinoma-cell-line
#4
Agata Antosiak, Katarzyna Milowska, Katarzyna Maczynska, Sylwia Rozalska, Teresa Gabryelak
Genistein belongs to isoflavones, which are a subclass of flavonoids, a large group of polyphenolic compounds widely distributed in plants. Numerous in vitro studies suggest that isoflavones, particularly genistein, have both chemopreventive and chemotherapeutic potential in multiple tumor types. However, the molecular and cellular mechanisms of genistein effects on human ovarian cancer cells are still little known. In the present study, we investigated anticancer activity of genistein and its natural glucoside, genistein-8-C-glucoside isolated from flowers of Lupinus luteus L...
2017: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/28111514/new-acetylenic-derivatives-of-betulin-and-betulone-synthesis-and-cytotoxic-activity
#5
REVIEW
Ewa Bębenek, Monika Kadela-Tomanek, Elwira Chrobak, Joanna Wietrzyk, Joanna Sadowska, Stanisław Boryczka
Betulin 1 and its semisynthetic derivatives exhibit a cytotoxic activity toward various cancer cell lines. These compounds are a promising and potential anticancer candidates. A series of betulin derivatives was prepared and tested for the antiproliferative activity in vitro against T47D breast cancer, CCRF/CEM leukemia, HL-60 promyelocytic leukemia, SW707 colorectal, murine P388 leukemia, as well as BALB3T3 normal fibroblasts cell lines. Cisplatin and betulin 1 were used as a reference compounds. Some derivatives of betulin showed a higher cytotoxic activity than the parent compound 1...
2017: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/28008217/anticancer-properties-of-baicalein-a-review
#6
Ying Gao, Shane A Snyder, Jaclyn N Smith, Yi Charlie Chen
The constituents of many traditional Chinese herbal remedies are currently at the forefront of modern cancer research. Baicalein, a bioactive flavone widely used in nutraceuticals and pharmaceuticals, has shown great potential in the treatment and prevention of cancer without causing severe side effects. Baicalein induces cancer cell apoptosis and cause cell cycle arrest. It shows inhibitory effects on angiogenesis, metastasis and inflammation, all of which are necessary for the promotion and progression of cancer...
August 2016: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/27818604/tat-dj-1-inhibits-oxidative-stress-mediated-rinm5f-cell-death-through-suppression-of-nf-%C3%AE%C2%BAb-and-mapk-activation
#7
Hyo Sang Jo, Hyun Ju Cha, Sang Jin Kim, Hyeon Ji Yeo, Su Bin Cho, Jung Hwan Park, Chi Hern Lee, Eun Ji Yeo, Yeon Joo Choi, Won Sik Eum, Soo Young Choi
Oxidative stress is highly involved in the development of diabetes mellitus by destruction of pancreatic β-cells. DJ-1 is an antioxidant protein and DJ-1 expression levels are known to be reduced in diabetes mellitus. Thus, we examined the effects of DJ-1 protein against oxidative stress-induced pancreatic β-cell (RINm5F) death using cell permeable wild-type and mutant-type (C106A) Tat-DJ-1 proteins, which both efficiently transduced into RINm5F cells. Intracellular stability of wild-type Tat-DJ-1 persisted two times longer than C106A Tat-DJ-1...
2016: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/27818603/synthesis-spectroscopic-characterization-and-anticancer-activity-of-new-10-substituted-1-6-diazaphenothiazines
#8
Beata Morak-Młodawska, Krystian Pluta, Małgorzata Latocha, Małgorzata Jeleń
New phenothiazine derivatives as 10-substituted dipyridothiazines of the 1,6-diazaphenothiazine structure were obtained in the cyclization reaction of 3-amino-3'-nitro-2,2'-dipyridinyl sulfide and 3,3'-dinitro-2,2'-dipyridinyl disulfide, and in the reaction of 2-chloro-3-ntropyridine with sodium 3-amino-2-pyridinethiolate followed by various alkylation and arylation reactions. The reaction of the thiazine ring formation ran via the Smiles rearrangement of the S-N type. As the alkylation reactions could proceed at the thiazine, azine or both nitrogen atoms, the product structure elucidation was based on the 2D NMR (Rotating-frame Overhauser Effect Spectroscopy, Correlated Spectroscopy, Heteronuclear Single Quantum Coherence, and Heteronuclear Multiple Bond Correlation) spectra of the N-methylated product...
2016: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/27499604/synthesis-antibacterial-and-antiproliferative-potential-of-some-new-1-pyridinecarbonyl-4-substituted-thiosemicarbazide-derivatives
#9
Monika Pitucha, Maciej Woś, Malgorzata Miazga-Karska, Katarzyna Klimek, Barbara Mirosław, Anna Pachuta-Stec, Agata Gładysz, Grazyna Ginalska
In this study, the antibacterial, cytotoxic and antiproliferative activities of novel thiosemicarbazide derivatives were assessed. Our results demonstrated that some of the novel compounds possess good antibacterial properties against Staphylococcus epidermidis, Streptococcus mutans and Streptococcus sanguinis and are only slightly cytotoxic; thus, they exhibit an excellent therapeutic index, which is higher than that of ethacridine lactate. Moreover, our data showed that compounds 2 and 4 have an antiproliferative activity against human breast adenocarcinoma and human hepatocellular carcinoma cell lines...
2016: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/27499603/identification-of-novel-natural-compound-inhibitors-for-human-complement-component-5a-receptor-by-homology-modeling-and-virtual-screening
#10
Faraz Shaikh, Shirley W I Siu
ABSTRACT: Neuropathic pain and inflammatory pain are two common types of pathological pain in human health problems. To date, normal painkillers are only partially effective in treating such pain, leading to a tremendous demand to develop new chemical entities to combat pain and inflammation. A promising pharmacological treatment is to control signal transduction via the inflammatory mediator-coupled receptor protein C5aR by finding antagonists to inhibit C5aR activation. Here, we report the first computational study on the identification of non-peptide natural compound inhibitors for C5aR by homology modeling and virtual screening...
2016: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/26446298/anti-tumor-activity-of-lipophilic-imidazolium-salts-on-select-nsclc-cell-lines
#11
Brian D Wright, Michael C Deblock, Patrick O Wagers, Ernest Duah, Nikki K Robishaw, Kerri L Shelton, Marie R Southerland, Michael A DeBord, Kortney M Kersten, Lucas J McDonald, Jason A Stiel, Matthew J Panzner, Claire A Tessier, Sailaja Paruchuri, Wiley J Youngs
The anti-tumor activity of imidazolium salts is highly dependent upon the substituents on the nitrogen atoms of the imidazolium cation. We have synthesized and characterized a series of naphthalene-substituted imidazolium salts and tested them against a variety of non-smallcell lung cancer cell lines. Several of these complexes displayed anticancer activity comparable to cisplatin. These compounds induced apoptosis in the NCI-H460 cell line as determined by Annexin V staining, caspase-3, and PARP cleavage. These results strongly suggest that this class of compounds can serve as potent chemotherapeutic agents...
July 2015: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/25866456/biological-evaluation-of-synthetic-chalcone-and-flavone-derivatives-as-anti-inflammatory-agents
#12
Nelly Mateeva, Madhavi Gangapuram, Elizabeth Mazzio, Suresh Eyunni, Karam F A Soliman, Kinfe K Redda
Flavonoids and chalcones are natural plant derived compounds with inherent therapeutic value for a range of human pathologies. In this study, a series of 24 substituted chalcones and flavones were synthesized and subsequently screened for anti-inflammatory effects on lipopolysaccharide (1 µg/ml)-activated BV-2 microglial cells by assessing initial production/release of nitric oxide (NO). The data obtained eliminate the majority of compounds as weak or non-effective, whereas 2'-hydroxy-3,4,5,3',4'-pentamethoxychalcone (1) and 2'-hydroxy-3,4,5-trimethoxychalcone (2) were potent, having an IC50 of 1...
April 2015: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/25750500/synthesis-and-evaluation-of-mefway-analogs-as-ligands-for-serotonin-5ht1a-receptors
#13
Joanne P Thio, Christopher Liang, Alisha K Bajwa, Dustin W Wooten, Bradley T Christian, Jogeshwar Mukherjee
(18)F-Mefway (N-{2-[4-(2'-methoxyphenyl)piperazinyl]ethyl}-N-(2-pyridyl)-N-(4'-(18)F-fluoro-methylcyclohexane)carboxamide) was developed and evaluated for use as a PET ligand for imaging 5-HT1A receptors. Ongoing studies of (18)F-Mefway have shown it to be an effective PET radiotracer. We have synthesized isomers of Mefway by changing the position of the methyl-group in attempts to evaluate stability for imaging purposes. 2-Methyl-, 3-methyl-, and 4-methyl-cyclohexane-1-carboxylic acids and 3-carbomethoxy-, 4-carbomethoxycyclohexane-1-carboxylic acids were coupled with WAY-100634 to provide the methylcyclohexyl derivatives (2-, 3- and 4-methyl)...
April 2015: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/26213456/synthesis-and-antibacterial-activity-of-schiff-bases-and-amines-derived-from-alkyl-2-2-formyl-4-nitrophenoxy-alkanoates
#14
Agata Goszczyńska, Halina Kwiecień, Karol Fijałkowski
A series of novel Schiff bases and secondary amines were obtained in good yields, as a result of the reductive amination of alkyl 2-(2-formyl-4-nitrophenoxy)alkanoates with both aniline and 4-methoxyaniline under established mild reaction conditions. Sodium triacetoxyborohydride as well as hydrogen in the presence of palladium on carbon were used as efficient reducing agents of the Schiff bases, in both direct and stepwise reductive amination processes. The Schiff bases, amines, and amine hydrochlorides were designed as potential antibacterial agents, and structure-activity relationship could be established following in vitro assays against Gram-positive and Gram-negative bacteria...
2015: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/26190908/synthesis-of-dehydrodipeptide-esters-and-their-evaluation-as-inhibitors-of-cathepsin-c
#15
Maciej Makowski, Paweł Lenartowicz, Bartosz Oszywa, Michał Jewgiński, Małgorzata Pawełczak, Paweł Kafarski
The procedures for the synthesis of esters of dehydropeptides containing C-terminal (Z)-dehydrophenylalanine and dehydroalanine have been elaborated. These esters appeared to be moderate or weak inhibitors of cathepsin C, with some of them exhibiting slow-binding behavior. As shown by molecular modeling, they are rather bound at the surface of the enzyme and are not submersed in its binding cavities.
2015: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/26167104/synthesis-and-anticancer-activity-of-thiosubstituted-purines
#16
Alicja Kowalska, Małgorzata Latocha, Krystian Pluta
New thiopurines with the propargylthio, pyrrolidinobutynylthio, sulfenamide, and sulfonamide groups in the pyrimidine ring were synthesized. The anticancer activity of these compounds and previously obtained 2- or 6-substituted azathioprine analogs and dialkylaminoalkylthiopurines were tested in vitro against three cell lines: glioblastoma SNB-19, melanoma C-32, and human ductal breast epithelial tumor T47D. 2-Chloro-7-methyl-6-pyrrolidinobutynylthiopurine (5b) was the most potent compound against SBN-19 and C-32 cell lines with the activity similar to cisplatin (EC50 = 5...
2015: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/26167103/synthesis-and-anticonvulsant-activity-of-new-n-phenyl-2-4-phenylpiperazin-1-yl-acetamide-derivatives
#17
Krzysztof Kamiński, Beata Wiklik, Jolanta Obniska
Twenty-two new N-phenyl-2-(4-phenylpiperazin-1-yl)acetamide derivatives have been synthesized and evaluated for their anticonvulsant activity in animal models of epilepsy. These molecules have been designed as analogs of previously obtained anticonvulsant active pyrrolidine-2,5-diones in which heterocyclic imide ring has been changed into chain amide bound. The final compounds were synthesized in the alkylation reaction of the corresponding amines with the previously obtained alkylating reagents 2-chloro-1-(3-chlorophenyl)ethanone (1) or 2-chloro-1-[3-(trifluoromethyl)phenyl]ethanone (2)...
2015: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/25999671/activity-of-fluconazole-and-its-cu-ii-complex-towards-candida-species
#18
Adam Ząbek, Justyna Nagaj, Agnieszka Grabowiecka, Ewa Dworniczek, Urszula Nawrot, Piotr Młynarz, Małgorzata Jeżowska-Bojczuk
Candida species, although they are present as commensal organisms in the digestive tract of healthy individuals, can produce a broad spectrum of serious illnesses in compromised hosts. Fluconazole, a water-soluble triazole with bioavailability greater than 90 %, has been extensively used to treat a wide range of Candida infections. However, a growing resistance of microorganisms in the treatment leads to the discovery of new drugs or modifications of existing ones. The aim of the present study was to investigate whether coordination of Cu(II) ions to fluconazole affects its antifungal activity...
2015: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/25750501/synthesis-of-quinoline-naphthalene-containing-azaphenothiazines-and-their-potent-in-vitro-antioxidant-properties
#19
Małgorzata Jeleń, Eugenia I Bavavea, Maria Pappa, Angeliki P Kourounakis, Beata Morak-Młodawska, Krystian Pluta
New tetracyclic and pentacyclic azaphenothiazines containing one or two quinoline rings instead of benzene rings were obtained in the original reactions of isomeric diquinodithiins, dichlorodiquinolinyl sulfides, and disulfide with aromatic amines. The type of ring fusion in the azaphenothiazine system was concluded from the (1)H NMR spectra. The obtained azaphenothiazines were evaluated in vitro for their antioxidant activity on rat hepatic microsomal membranes for protection of non-enzymatic lipid peroxidation promoted by the Fe(2+)/ascorbic acid redox system...
2015: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/25750499/synthesis-and-selected-immunological-properties-of-10-substituted-1-8-diazaphenothiazines
#20
Beata Morak-Młodawska, Krystian Pluta, Michał Zimecki, Małgorzata Jeleń, Jolanta Artym, Maja Kocięba
A new type of tricyclic azaphenothiazines-1,8-diazaphenothiazines-was obtained in the reaction of 2,3- and 3,4-disubstituted pyridines. The reaction ran as the Smiles rearrangement. The 1,8-diazaphenothiazine system was determined using NOE experiment and 2D NMR spectra (COSY, HSQC, HMBC). 10H-1,8-diazaphenothiazine was transformed into 10-derivatives with alkyl, aminoalkyl, amidoalkyl, sulfonamidoalkyl, and nitrogen half-mustard groups. The compounds were tested for their effects on phytohemagglutinin A-induced proliferative response of human peripheral blood mononuclear cells (PBMC) and lipopolysaccharide-induced tumor necrosis factor alpha production by human whole blood cultures...
2015: Medicinal Chemistry Research
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