scholarly journals Four New Iridoid Metabolites Have Been Isolated from the Stems of Neonauclea reticulata (Havil.) Merr. with Anti-Inflammatory Activities on LPS-Induced RAW264.7 Cells

Molecules ◽  
2019 ◽  
Vol 24 (23) ◽  
pp. 4271
Author(s):  
Fang-Pin Chang ◽  
Shyh-Shyun Huang ◽  
Tzong-Huei Lee ◽  
Chi-I Chang ◽  
Tzong-Fu Kuo ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Detailed Analysis ◽  
Cell Line ◽  
Spectroscopic Data ◽  
Protocatechuic Acid ◽  
Control Group ◽  
No Production ◽  
Raw264.7 Macrophages ◽  
Ic50 Values ◽  
Inhibitory Activities

One new iridoid, namely neonanin C (1) one monocyclic iridoid ring-opened derivative namely neonanin D (2), two new bis-iridoid derivatives namely reticunin A (3) and reticunin B (4) with sixteen known compounds (5–20) were isolated from the stems of Neonauclea reticulata (Havil.) Merr. These new structures were determined by the detailed analysis of spectroscopic data and comparison with the data of known analogues. Compounds 1–20 were evaluated for inhibition of nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophages cell line. The results showed that all compounds exhibited no obvious cytotoxicity compared to the control group and five compounds including isoboonein (7), syringaresinol (10), (+)-medioresinol (12), protocatechuic acid (14) and trans-caffeic acid (15) exhibited inhibitory activities with IC50 values at 86.27 ± 3.45; 9.18 ± 1.90; 76.18 ± 2.42; 72.91 ± 4.97 and 95.16 ± 1.20 µg/mL, respectively.

scholarly journals Cytotoxicity and Nitric Oxide Production Inhibitory Activities of Compounds Isolated from the Plant Pathogenic Fungus Curvularia sp

2021 ◽  
Vol 7 (6) ◽  
pp. 408
Author(s):  
Virayu Suthiphasilp ◽  
Achara Raksat ◽  
Tharakorn Maneerat ◽  
Sarinya Hadsadee ◽  
Siriporn Jungsuttiwong ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Spectroscopic Data ◽  
Pathogenic Fungus ◽  
K562 Cells ◽  
2D Nmr ◽  
No Production ◽  
Nitric Oxide Production ◽  
Dactyloctenium Aegyptium ◽  
Ic50 Values ◽  
Inhibitory Activities

Chemical investigation of the mycelia of the pathogenic fungus Curvularia sp. which was isolated from a leaf of Dactyloctenium aegyptium (crowfoot grass), resulted in the isolation of a new compound, curvulariahawadride (5), along with five known compounds (1–4, and 6). Their structures were determined on the basis of spectroscopic data, including 1D and 2D NMR and HRESIMS. The absolute configuration of 5 was established from experimental and calculated electronic circular dichroism (ECD). Compounds 1, 3, and 5 showed nitric oxide (NO) production inhibitory activity with IC50 values of 53.7, 32.8, and 12.8 µM, respectively. Compounds 2 and 4 showed significant cytotoxicity against lung cancer A549, colorectal cancer SW480, and leukemic K562 cells with an IC50 ranging value of 11.73 to 17.59 µM.

scholarly journals A New Pentacyclic Triterpene fromHumata tyermanniMoore with the Inhibitory Activities against LPS-Induced NO Production in RAW264.7 Macrophages

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Lei Zhang ◽  
Feng Wang ◽  
Zhen-You Jiang ◽  
Yao-Kui Zhu ◽  
Ying-Zhou Cen
Keyword(s):  
Nitric Oxide ◽  
Spectral Analysis ◽  
2D Nmr ◽  
No Production ◽  
Pentacyclic Triterpene ◽  
Raw264.7 Macrophages ◽  
Inhibitory Activities

One new pentacyclic triterpene, hopane-22 (29)-en-24ol(2), with five known hopane-type pentacyclic triterpene compounds: hop-22(29)-ene(1), adiantone(3), 22-hydroxyhopane(4), 6α, 22-dihydroxyhopane(5), and 17(21)-hopene(6)were isolated fromHumata tyermanniMoore. The structure of compound2was elucidated on the basis of its 1D and 2D NMR spectral analysis. All these compounds were evaluated for their inhibitory activities of LPS-induced nitric oxide (NO) production in RAW264.7 macrophages.

Antineuroinflammatory constituents from the root extract of Paris verticillata

2011 ◽  
Vol 89 (4) ◽  
pp. 441-445 ◽  
Author(s):  
Ki Hyun Kim ◽  
Kyu Ha Lee ◽  
Ho Kyung Kim ◽  
Eunjung Moon ◽  
Sung-Hoon Kim ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Fatty Acid ◽  
Cell Line ◽  
Spectroscopic Data ◽  
2D Nmr ◽  
No Production ◽  
Root Extract ◽  
Meoh Extract ◽  
Microglia Cell ◽  
Chemical Evidence

Two new cyclopropanoic fatty acid glycosides, named parisveroside A (1) and parisveroside B (2), were isolated from a MeOH extract of the roots of Paris verticillata (Liliaceae) together with three other known compounds, salicin (3), 3-(β-d-glucopyranosyloxymethyl)-2-(4-hydroxy-3-methoxyphenyl)-5-(3-hydroxypropyl)-7-methoxy-(2R,3S)-dihydrobenzofuran (4), and allantoin (5). Their structures were elucidated on the basis of spectroscopic data, including 1D and 2D NMR, HR-FAB-MS, and chemical evidence. To investigate the antineuroinflammatory effects of the isolated compounds (1–5), nitric oxide (NO) production was evaluated in the lipopolysaccharide-activated microglia cell line, BV-2. Compounds 2 and 4 significantly inhibited NO production with IC50 values of 74.8 and 60.5 µmol/L, respectively.

scholarly journals Alkaloids with Nitric Oxide Inhibitory Activities from the Roots of Isatis tinctoria

Molecules ◽  
2019 ◽  
Vol 24 (22) ◽  
pp. 4033 ◽  
Author(s):  
Dongdong Zhang ◽  
Yanhong Shi ◽  
Jingyi Li ◽  
Deqing Ruan ◽  
Qi Jia ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Biosynthetic Pathway ◽  
Indole Alkaloid ◽  
No Production ◽  
Inhibitory Effects ◽  
Ongoing Research ◽  
Isatis Tinctoria ◽  
Raw264.7 Macrophages ◽  
Ic50 Values ◽  
Phenol Moiety

As our ongoing research project on Ban Lan Gen (Isatis tinctoria roots), a total of 23 alkaloids were obtained. Compounds 1 and 2 contain an unusual C–C bond between the 2(1H)-quinolinone moiety and the phenol moiety and between the 2(1H)-quinolinone moiety and the 1H-indole moiety, respectively. Compound 3 possesses an unusual carbon skeleton and its putative biosynthetic pathway was discussed, and Compound 23 was deduced as a new indole alkaloid glycoside. Compounds 4–7 were identified as four new natural products by extensive spectroscopic experiments. Additionally, the anti-inflammatory activity was assessed based on nitric oxide (NO) production using Lipopolysaccharide-stimulated RAW264.7 macrophages. Compounds 9, 15, and 17 showed inhibitory effects with IC50 values of 1.2, 5.0, and 74.4 μM.

scholarly journals Highly Substituted Phenol Derivatives with Nitric Oxide Inhibitory Activities from the Deep-Sea-Derived Fungus Trichobotrys effuse FS524

Marine Drugs ◽  
2020 ◽  
Vol 18 (3) ◽  
pp. 134 ◽  
Author(s):  
Shanchong Chen ◽  
Zhaoming Liu ◽  
Yuchan Chen ◽  
Haibo Tan ◽  
Saini Li ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Deep Sea ◽  
No Production ◽  
Pharmaceutical Drugs ◽  
X Ray Diffraction ◽  
Etoac Extract ◽  
Raw 264.7 Macrophages ◽  
Phenol Derivatives ◽  
Ic50 Values ◽  
Inhibitory Activities

Chemical investigation on EtOAc extract of the deep-sea-derived fungus Trichobotrys effuse FS524 resulted in the isolation of six new highly substituted phenol derivatives, trieffusols A–F (1–6), along with ten known relative analogs (7–16). Their structures with absolute configurations were extensively characterized on the basis of spectroscopic data analyses, single-crystal X-ray diffraction experiments, and electronic circular dichroism (ECD) calculations. Structurally, trieffusols A and B shared an unprecedented ploy-substituted 9-phenyl-hexahydroxanthone skeleton with an intriguing 6-6/6/6 tetracyclic fused ring system, which is often encountered as significant moieties in the pharmaceutical drugs but rarely discovered in natural products. In the screening towards their anti-inflammatory activities of 1–6, trieffusols C and D exhibited moderate inhibitory activities against nitric oxide (NO) production in LPS-induced RAW 264.7 macrophages with IC50 values ranging from 51.9 to 55.9 μM.

scholarly journals New bakuchiol dimers from Psoraleae Fructus and their inhibitory activities on nitric oxide production

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Qingxia Xu ◽  
Qian lv ◽  
Lu Liu ◽  
Yingtao Zhang ◽  
Xiuwei Yang
Keyword(s):  
Nitric Oxide ◽  
Inflammatory Diseases ◽  
Positive Control ◽  
No Production ◽  
Psoralea Corylifolia ◽  
X Ray Diffraction ◽  
Raw264.7 Macrophages ◽  
Griess Reaction ◽  
Inhibitory Activities ◽  
Oxygen Substitution

Abstract Background Dried fruits of Psoralea corylifolia L. (Psoraleae Fructus) is one of the most popular traditional Chinese medicine with treatment for nephritis, spermatorrhea, pollakiuria, asthma, and various inflammatory diseases. Bakuchiol is main meroterpenoid with bioactive diversity from Psoraleae Fructus. This study was designed to seek structural diverse bakuchiol derivants with anti-inflammatory activities from this plant. Methods Various column chromatography methods were used for isolation experiment. Structures and configurations of these compounds were determined by spectroscopic methods and single-crystal X-ray diffraction. Their inhibition on nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophages were evaluated by the Griess reaction. Results Twelve unpresented bakuchiol dimmers, bisbakuchiols M–U (1–9) and bisbakuchiol ethers A–C (10–12), along with five known compounds (13–17), were isolated from the fruits of Psoralea corylifolia L. Compounds 1–3, 10–12, 16 and 17 exhibited inhibitory activities against LPS-induced NO production in RAW264.7 macrophages, and the inhibition of compound 1 (half maximal inhibitory concentration (IC50) value = 11.47 ± 1.57 μM) was equal to that of L-N(6)-(1-iminoethyl)-lysine (IC50 = 10.29 ± 1.10 μM) as a positive control. Conclusions Some compounds exhibited inhibitory activities against NO production, and the study of structure–activity relationship suggested that uncyclized compounds with oxygen substitution at C-12/12′ showed strong inhibitory activities, and carbonyl units contributed to enhanced activities.

Ruxolitinib Regulates the Autophagy Machinery in Multiple Myeloma Cells

2020 ◽  
Vol 20 (18) ◽  
pp. 2316-2323 ◽  
Author(s):  
Alican Kusoglu ◽  
Bakiye G. Bagca ◽  
Neslihan P.O. Ay ◽  
Guray Saydam ◽  
Cigir B. Avci
Keyword(s):  
Multiple Myeloma ◽  
Cell Line ◽  
B Lymphocyte ◽  
Plasma Cells ◽  
Annexin V ◽  
Myeloma Cell ◽  
Control Group ◽  
Multiple Myeloma Cell ◽  
Ic50 Values ◽  
Stat Pathway

Background: Ruxolitinib is a selective JAK1/2 inhibitor approved by the FDA for myelofibrosis in 2014 and nowadays, comprehensive investigations on the potential of the agent as a targeted therapy for haematological malignancies are on the rise. In multiple myeloma which is a cancer of plasma cells, the Interleukin- 6/JAK/STAT pathway is emerging as a therapeutic target since the overactivation of the pathway is associated with poor prognosis. Objective: In this study, our purpose was to discover the potential anticancer effects of ruxolitinib in ARH-77 multiple myeloma cell line compared to NCI-BL 2171 human healthy B lymphocyte cell line. Methods: Cytotoxic effects of ruxolitinib in ARH-77 and NCI-BL 2171 cells were determined via WST-1 assay. The autophagy mechanism induced by ruxolitinib measured by detecting autophagosome formation was investigated. Apoptotic effects of ruxolitinib were analyzed with Annexin V-FITC Detection Kit and flow cytometry. We performed RT-qPCR to demonstrate the expression changes of the genes in the IL-6/JAK/STAT pathway in ARH-77 and NCI-BL 2171 cells treated with ruxolitinib. Results: We identified the IC50 values of ruxolitinib for ARH-77 and NCI-BL 2171 as 20.03 and 33.9μM at the 72nd hour, respectively. We showed that ruxolitinib induced autophagosome accumulation by 3.45 and 1.70 folds in ARH-77 and NCI-BL 2171 cells compared to the control group, respectively. Treatment with ruxolitinib decreased the expressions of IL-6, IL-18, JAK2, TYK2, and AKT genes, which play significant roles in MM pathogenesis. Conclusion: All in all, ruxolitinib is a promising agent for the regulation of the IL-6/JAK/STAT pathway and interferes with the autophagy mechanism in MM.

scholarly journals Structural Characterization and Assessment of Anti-Inflammatory and Anti-Tyrosinase Activities of Polyphenols from Melastoma normale

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3913
Author(s):  
Rui-Jie He ◽  
Jun Li ◽  
Yong-Lin Huang ◽  
Ya-Feng Wang ◽  
Bing-Yuan Yang ◽  
...  
Keyword(s):  
Enzyme Inhibitors ◽  
Enzyme Inhibitor ◽  
Structure Identification ◽  
No Production ◽  
Protective Effects ◽  
Successful Isolation ◽  
Ic50 Values ◽  
Development And Utilization ◽  
Inhibitory Activities ◽  
Anti Inflammatory

Polyphenols, widely distributed in the genus Melastoma plants, possess extensive cellular protective effects such as anti-inflammatory, anti-tyrosinase, and anti-obesity, which makes it a potential anti-inflammatory drug or enzyme inhibitor. Therefore, the aim of this study is to screen for the anti-inflammatory and enzyme inhibitory activities of compounds from title plant. Using silica gel, MCI, ODS C18, and Sephadex LH-20 column chromatography, as well as semipreparative HPLC, the extract of Melastoma normale roots was separated. Four new ellagitannins, Whiskey tannin C (1), 1-O-(4-methoxygalloyl)-6-O-galloyl-2,3-O-(S)-hexahydroxydiphenoyl-β-d-glucose (2), 1-O-galloyl-6-O-(3-methoxygalloyl)-2,3-O-(S)-hexahydroxydiphenoyl-β-d-glucose (3), and 1-O-galloyl-6-O-vanilloyl-2,3-O-(S)-hexahydroxydiphenoyl-β-d-glucose (4), along with eight known polyphenols were firstly obtained from this plant. The structures of all isolates were elucidated by HRMS, NMR, and CD analyses. Using lipopolysaccharide (LPS)-stimulated RAW2 64.7 cells, we investigated the anti-inflammatory activities of compounds 1–4, unfortunately, none of them exhibit inhibit nitric oxide (NO) production, their IC50 values are all > 50 μM. Anti-tyrosinase activity assays was done by tyrosinase inhibition activity screening model. Compound 1 showed weak tyrosinase inhibitory activity with IC50 values of 426.02 ± 11.31 μM. Compounds 2–4 displayed moderate tyrosinase inhibitory activities with IC50 values in the range of 124.74 ± 3.12–241.41 ± 6.23 μM. The structure–activity relationships indicate that hydroxylation at C-3′, C-4′, and C-3 in the flavones were key to their anti-tyrosinase activities. The successful isolation and structure identification of ellagitannin provide materials for the screening of anti-inflammatory drugs and enzyme inhibitors, and also contribute to the development and utilization of M. normale.

Renal and pressor effects of aminoguanidine in cirrhotic rats with ascites.

1996 ◽  
Vol 7 (12) ◽  
pp. 2694-2699
Author(s):  
M C Ortíz ◽  
L A Fortepiani ◽  
C Martínez ◽  
N M Atucha ◽  
J García-Estañ
Keyword(s):  
Nitric Oxide ◽  
Blood Pressure ◽  
Liver Cirrhosis ◽  
Experimental Model ◽  
Systemic Blood Pressure ◽  
Arterial Hypotension ◽  
Control Group ◽  
No Production ◽  
Water Excretion ◽  
Excretory Function

Recent work indicates that nitric oxide (NO) plays an important role in the systemic and renal alterations of liver cirrhosis. This study used aminoguanidine (AG), a preferential inhibitor of inducible nitric oxide synthase (iNOS), to evaluate the role of this NOS isoform in the systemic and renal alterations of an experimental model of liver cirrhosis with ascites (carbon tetrachloride/ phenobarbital). Experiments have been performed in anesthetized cirrhotic rats and their respective control rats prepared for clearance studies. Administration of AG (10 to 100 mg/kg, iv) elevated dose-dependent mean arterial pressure (MAP, in mm Hg) in the cirrhotic rats from a basal level of 79.3 +/- 3.6 to 115.0 +/- 4.7, whereas in the control animals, MAP increased only with the highest dose of the inhibitor (from 121.8 +/- 3.6 to 133.3 +/- 1.4). In the cirrhotic group, AG also significantly increased sodium and water excretion, whereas these effects were very modest in the control group. Plasma concentration of nitrates+nitrites, measured as an index of NO production, were significantly increased in the cirrhotic animals in the basal period and decreased with AG to levels not significantly different from the control animals. Similar experiments performed with the nonspecific NOS inhibitor N omega-nitro-L-arginine (NNA) also demonstrated an increased pressor sensitivity of the cirrhotic rats, but the arterial hypotension was completely corrected. These results, in an experimental model of liver cirrhosis with ascites, show that AG exerts a beneficial effect as a result of inhibition of NO production, increasing blood pressure and improving the reduced excretory function. Because NNA, but not AG, completely normalized the arterial hypotension, it is suggested that the constitutive NOS isoform is also contributing in an important degree. It is concluded that the activation of both inducible and constitutive NOS isoforms plays an important role in the lower systemic blood pressure and associated abnormalities that characterize liver cirrhosis.

scholarly journals Antibacterial and Cytotoxic Phenolic Polyketides from Two Marine-Derived Fungal Strains of Aspergillus unguis

2022 ◽  
Vol 15 (1) ◽  
pp. 74
Author(s):  
Cao Van Anh ◽  
Joo-Hee Kwon ◽  
Jong Soon Kang ◽  
Hwa-Sun Lee ◽  
Chang-Su Heo ◽  
...  
Keyword(s):  
Tumor Cell ◽  
Detailed Analysis ◽  
Cell Lines ◽  
Spectroscopic Data ◽  
Bacterial Activity ◽  
Tumor Cell Lines ◽  
Fungal Strains ◽  
Aspergillus Unguis ◽  
Ic50 Values ◽  
New Compounds

A chemical investigation on the EtOAc extracts from two marine-derived fungal strains of Aspergillus unguis resulted in the isolation of three previously undescribed phenolic polyketides including unguidepside C (1), aspersidone B (3), and agonodepside C (12), and their 14 known congeners. The structures of the new compounds were determined based on detailed analysis and comparison of their spectroscopic data with literature values, as well as Snatzke’s method. The new compounds (1, 3, and 12) displayed a significant anti-Gram-positive bacterial activity, with MIC values ranging from 5.3 to 22.1 µM. Additionally, the isolated compounds (1–11 and 13–16) were evaluated for their cytotoxicity against a panel of tumor cell lines. Most of them (except for 9) displayed cytotoxicity against all the tested cell lines, with IC50 values ranging from 2.5 to 46.9 µM.

Sign in / Sign up

Export Citation Format

Share Document