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1.
Int J Mol Sci ; 25(10)2024 May 17.
Article in English | MEDLINE | ID: mdl-38791538

ABSTRACT

Various studies have shown that Hypogymnia physodes are a source of many biologically active compounds, including lichen acids. These lichen-specific compounds are characterized by antioxidant, antiproliferative, and antimicrobial properties, and they can be used in the cosmetic and pharmaceutical industries. The main aim of this study was to optimize the composition of natural deep eutectic solvents based on proline or betaine and lactic acid for the extraction of metabolites from H. physodes. The design of the experimental method and the response surface approach allowed the optimization of the extraction process of specific lichen metabolites. Based on preliminary research, a multivariate model of the experiment was developed. For optimization, the following parameters were employed in the experiment to confirm the model: a proline/lactic acid/water molar ratio of 1:2:2. Such a mixture allowed the efficient extraction of three depsidones (i.e., physodic acid, physodalic acid, 3-hydroyphysodic acid) and one depside (i.e., atranorin). The developed composition of the solvent mixtures ensured good efficiency when extracting the metabolites from the thallus of H. physodes with high antioxidant properties.


Subject(s)
Depsides , Lactones , Depsides/chemistry , Depsides/isolation & purification , Depsides/pharmacology , Lactones/chemistry , Lactones/isolation & purification , Lactones/pharmacology , Deep Eutectic Solvents/chemistry , Antioxidants/chemistry , Antioxidants/pharmacology , Antioxidants/isolation & purification , Proline/chemistry , Lichens/chemistry , Lactic Acid/chemistry , Green Chemistry Technology/methods , Betaine/chemistry , Betaine/analogs & derivatives , Betaine/pharmacology , Solvents/chemistry , Dibenzoxepins , Hydroxybenzoates
2.
Phytochemistry ; 222: 114070, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38574957

ABSTRACT

Ten ergostane-type steroids, including seven undescribed ones named spectasteroids A-G, were obtained from Aspergillus spectabilis. Their structures and absolute configurations were determined based on HRESIMS, NMR, ECD calculations, and single-crystal X-ray diffraction analyses. Structurally, spectasteroid A was a unique example of aromatic ergostane-type steroid that featured a rare peroxide ring moiety; spectasteroid B contained a rare oxetane ring system formed between C-9 and C-14; and spectasteroid C was an unusual 3,4-seco-ergostane steroid with an extra lactone ring between C-3 and C-9. Spectasteroids F and G specifically showed inhibitory effects against concanavalin A-induced T lymphocyte proliferation and lipopolysaccharide-induced B lymphocyte proliferation, with IC50 values ranging from 2.33 to 4.22 µM. Spectasteroid F also showed excellent antimultidrug resistance activity, which remarkable enhanced the inhibitory activity of PTX on the colony formation of SW620/Ad300 cells.


Subject(s)
Aspergillus , Immunosuppressive Agents , Peroxides , Aspergillus/chemistry , Immunosuppressive Agents/pharmacology , Immunosuppressive Agents/chemistry , Immunosuppressive Agents/isolation & purification , Peroxides/chemistry , Peroxides/pharmacology , Peroxides/isolation & purification , Molecular Structure , Humans , Lactones/chemistry , Lactones/pharmacology , Lactones/isolation & purification , Ergosterol/chemistry , Ergosterol/pharmacology , Ergosterol/isolation & purification , Ergosterol/analogs & derivatives , Cell Proliferation/drug effects , Ethers, Cyclic/chemistry , Ethers, Cyclic/pharmacology , Ethers, Cyclic/isolation & purification , Structure-Activity Relationship , Dose-Response Relationship, Drug , Mice , T-Lymphocytes/drug effects
3.
Chem Biodivers ; 21(5): e202400265, 2024 May.
Article in English | MEDLINE | ID: mdl-38470349

ABSTRACT

The phytochemical investigation of the leaves of Inula confertiflora, a medicinal plant endemic to Ethiopia, led to the isolation of 15 terpenoids; 1ß-hydroxy-α-costic acid (1), 3α-hydroxycostic acid (2), isotelekin (3), asperilin (4), carabrone (5), carpesioline (6), graveolide (7), inuviscolide (8), 8-epi-inuviscolide (9), 1ß,4ß-dihydroxy-5α(H)-guaia-10(14),11(13)-dien-8α,12-olide (10), isoinuviscolide (11), 4ß,10ß-dihydroxy-5α(H)-1,11(13)-guaidien-8α,12-olide (12), 4ß,10ß-dihydroxy-1ß(H)-5α(H)-guai-11(13)-en-8α,12-olide (13), 4ß,10α-dihydroxy-1ß(H)-5α(H)-guai-11(13)-en-8α,12-olide (14), 4ß,10α-dihydroxy-1α(H)-5α(H)-guai-11(13)-en-8α,12-olide (15). Herein, structural elucidation and full NMR data for compound 1 are presented for the first time. The structures were elucidated using NMR, HRESIMS, and by comparison with literature data. The relative configurations were defined by NOESY correlations and single-crystal X-ray crystallography. Herein, crystallography data of 6 and 7 were reported for the first time. The antibacterial efficacy of some of the isolated compounds was evaluated against two commonly dispersed environmental strains of Escherichia coli and Staphylococcus aureus. Compounds 1, 3, 6, 7, and 8 exhibited moderate antibacterial activities against the tested organisms. The chemotaxonomic significance of compounds is discussed.


Subject(s)
Anti-Bacterial Agents , Inula , Lactones , Microbial Sensitivity Tests , Sesquiterpenes , Anti-Bacterial Agents/pharmacology , Anti-Bacterial Agents/chemistry , Anti-Bacterial Agents/isolation & purification , Lactones/chemistry , Lactones/pharmacology , Lactones/isolation & purification , Inula/chemistry , Sesquiterpenes/chemistry , Sesquiterpenes/pharmacology , Sesquiterpenes/isolation & purification , Plant Leaves/chemistry , Staphylococcus aureus/drug effects , Structure-Activity Relationship , Molecular Structure , Molecular Conformation
4.
J Nat Prod ; 85(11): 2557-2569, 2022 11 25.
Article in English | MEDLINE | ID: mdl-36351173

ABSTRACT

A library of more than 2500 plant extracts was screened for activity on oncogenic signaling in melanoma cells. The ethyl acetate extract from the aerial parts of Artemisia argyi displayed pronounced inhibition of the PI3K/AKT pathway. Active compounds were tracked with the aid of HPLC-based activity profiling, and altogether 21 active compounds were isolated, including one novel dimerosequiterpenoid (1), one new disesquiterpenoid (2), three new guaianolides (3-5), 12 known sesquiterpenoids (6-17), and four known flavonoids (19-22). A new eudesmanolide derivative (13b) was isolated as an artifact formed by methanolysis. Compound 1 is the first adduct comprising a sesquiterpene lactone and a methyl jasmonate moiety. The absolute configurations of compounds 1 and 3-18 were established by comparison of their experimental and calculated ECD spectra. The absolute configuration for 2 was determined by X-ray diffraction analysis. Guaianolide 8 was the most potent sesquiterpene lactone, inhibiting the PI3K/AKT pathway with an IC50 value of 8.9 ± 0.9 µM.


Subject(s)
Antineoplastic Agents , Artemisia , Lactones , Melanoma , Phosphatidylinositol 3-Kinases , Phytochemicals , Protein Kinase Inhibitors , Proto-Oncogene Proteins c-akt , Sesquiterpenes , Artemisia/chemistry , Lactones/chemistry , Lactones/isolation & purification , Lactones/pharmacology , Melanoma/enzymology , Molecular Structure , Phosphatidylinositol 3-Kinases/metabolism , Phytochemicals/chemistry , Phytochemicals/isolation & purification , Phytochemicals/pharmacology , Proto-Oncogene Proteins c-akt/antagonists & inhibitors , Sesquiterpenes/chemistry , Sesquiterpenes/isolation & purification , Sesquiterpenes/pharmacology , Protein Kinase Inhibitors/chemistry , Protein Kinase Inhibitors/isolation & purification , Protein Kinase Inhibitors/pharmacology , Antineoplastic Agents/chemistry , Antineoplastic Agents/isolation & purification , Antineoplastic Agents/pharmacology
5.
Org Lett ; 24(40): 7328-7333, 2022 Oct 14.
Article in English | MEDLINE | ID: mdl-36200745

ABSTRACT

Molecular network analysis of Streptomyces sp. CMB-MW079 detected rare phosphorylated natural products. Miniaturized cultivation profiling (MATRIX) established optimal conditions for the production, isolation, and identification of the polyketide δ-lactone phoslactomycin E (1) and new ester homologues, phoslactomycins J and K (2 and 3), as well as unprecedented heterocyclic analogues, the tetrahydrofuran cyclolactomycins A-D (4-7) and γ-lactone isocyclolactomycins A-C (8-10). We propose a biogenetic relationship linking these cometabolites with the known lactomycins A-C which were tentatively identified as minor cometabolites.


Subject(s)
Biological Products , Lactones , Organophosphorus Compounds , Polyketides , Streptomyces , Wasps , Animals , Australia , Biological Products/chemistry , Biological Products/isolation & purification , Biological Products/pharmacology , Cell Line, Tumor , Esters/chemistry , Furans/chemistry , Humans , Lactones/chemistry , Lactones/isolation & purification , Lactones/pharmacology , Molecular Structure , Organophosphorus Compounds/chemistry , Organophosphorus Compounds/isolation & purification , Organophosphorus Compounds/pharmacology , Polyketides/chemistry , Polyketides/isolation & purification , Polyketides/pharmacology , Streptomyces/chemistry , Streptomyces/metabolism , Wasps/microbiology
6.
J Nat Prod ; 85(9): 2199-2206, 2022 09 23.
Article in English | MEDLINE | ID: mdl-35994072

ABSTRACT

Tetrodotoxin (TTX, 1) is a potent voltage-gated sodium channel blocker detected in certain marine and terrestrial organisms. We report here a new TTX analogue, 9-epiTTX (2), and a TTX-related compound, Tb-242B (4), isolated from the pufferfish Takifugu flavipterus and Dichotomyctere ocellatus, respectively. NMR analysis suggested that 2 exists as a mixture of hemilactal and 10,8-lactone forms, whereas other reported TTX analogues are commonly present as an equilibrium mixture of hemilactal and 10,7-lactone forms. Compound 2 and TTX were confirmed not to convert to each other by incubation under neutral and acidic conditions at 37 °C for 24 h. Compound 4 was identified as the 9-epimer of Tb-242A (3), previously reported as a possible biosynthetic precursor of TTX. Compound 4 was partially converted to 3 by incubation in a neutral buffer at 37 °C for 7 days, whereas 3 was not converted to 4 under this condition. Compound 2 was detected in several TTX-containing marine animals and a newt. Mice injected with 600 ng of 2 by intraperitoneal injection did not show any adverse symptoms, suggesting that the C-9 configuration in TTX is critical for its biological activity. Based on the structures, 2 and 4 were predicted to be shunt products for TTX biosynthesis.


Subject(s)
Takifugu , Tetraodontiformes , Tetrodotoxin , Voltage-Gated Sodium Channel Blockers , Animals , Lactones/chemistry , Lactones/isolation & purification , Mice , Tetrodotoxin/chemistry , Tetrodotoxin/isolation & purification , Tetrodotoxin/pharmacology , Voltage-Gated Sodium Channel Blockers/chemistry , Voltage-Gated Sodium Channel Blockers/isolation & purification , Voltage-Gated Sodium Channel Blockers/pharmacology
7.
Molecules ; 27(3)2022 Jan 26.
Article in English | MEDLINE | ID: mdl-35164089

ABSTRACT

Liver cancer is a leading cause of cancer death globally. Marine mollusc-derived drugs have gained attention as potential natural-based anti-cancer agents to overcome the side effects caused by conventional chemotherapeutic drugs during cancer therapy. Using liquid chromatography-mass spectrometry, the main biomolecules in the purple ink secretion released by the sea hare, named Bursatella leachii (B. leachii), were identified as hectochlorin, malyngamide X, malyngolide S, bursatellin and lyngbyatoxin A. The cytotoxic effects of B. leachii ink concentrate against human hepatocarcinoma (HepG2) cells were determined to be dose- and time-dependent, and further exploration of the underlying mechanisms causing the programmed cell death (apoptosis) were performed. The expression of cleaved-caspase-8 and cleaved-caspase-3, key cysteine-aspartic proteases involved in the initiation and completion of the apoptosis process, appeared after HepG2 cell exposure to the B. leachii ink concentrate. The gene expression levels of pro-apoptotic BAX, TP53 and Cyclin D1 were increased after treatment with the B. leachii ink concentrate. Applying in silico approaches, the high scores predicted that bioactivities for the five compounds were protease and kinase inhibitors. The ADME and cytochrome profiles for the compounds were also predicted. Altogether, the B. leachii ink concentrate has high pro-apoptotic potentials, suggesting it as a promising safe natural product-based drug for the treatment of liver cancer.


Subject(s)
Antineoplastic Agents/pharmacology , Biological Products/pharmacology , Carcinoma, Hepatocellular/drug therapy , Gastropoda/chemistry , Liver Neoplasms/drug therapy , Amides/chemistry , Amides/isolation & purification , Amides/pharmacology , Animals , Antineoplastic Agents/chemistry , Antineoplastic Agents/isolation & purification , Apoptosis/drug effects , Biological Products/chemistry , Biological Products/isolation & purification , Hep G2 Cells , Humans , Lactones/chemistry , Lactones/isolation & purification , Lactones/pharmacology , Lyngbya Toxins/chemistry , Lyngbya Toxins/isolation & purification , Lyngbya Toxins/pharmacology , Pyrrolidinones/chemistry , Pyrrolidinones/isolation & purification , Pyrrolidinones/pharmacology , Thiazoles/chemistry , Thiazoles/isolation & purification , Thiazoles/pharmacology
8.
Molecules ; 27(3)2022 Feb 08.
Article in English | MEDLINE | ID: mdl-35164406

ABSTRACT

Sesquiterpene lactones (SL), characterized by their high prevalence in the Asteraceae family, are one of the major groups of secondary metabolites found in plants. Researchers from distinct research fields, including pharmacology, medicine, and agriculture, are interested in their biological potential. With new SL discovered in the last years, new biological activities have been tested, different action mechanisms (synergistic and/or antagonistic effects), as well as molecular structure-activity relationships described. The review identifies the main sesquiterpene lactones with interconnections between immune responses and anti-inflammatory actions, within different cellular models as well in in vivo studies. Bioaccessibility and bioavailability, as well as molecular structure-activity relationships are addressed. Additionally, plant metabolic engineering, and the impact of sesquiterpene lactone extraction methodologies are presented, with the perspective of biological activity enhancement. Sesquiterpene lactones derivatives are also addressed. This review summarizes the current knowledge regarding the therapeutic potential of sesquiterpene lactones within immune and inflammatory activities, highlighting trends and opportunities for their pharmaceutical/clinical use.


Subject(s)
Anti-Inflammatory Agents/pharmacology , Immunomodulating Agents/pharmacology , Lactones/pharmacology , Sesquiterpenes/pharmacology , Animals , Anti-Inflammatory Agents/chemistry , Anti-Inflammatory Agents/isolation & purification , Asteraceae/chemistry , Drug Discovery , Humans , Immunomodulating Agents/chemistry , Immunomodulating Agents/isolation & purification , Lactones/chemistry , Lactones/isolation & purification , Sesquiterpenes/chemistry , Sesquiterpenes/isolation & purification
9.
Bioorg Chem ; 118: 105482, 2022 01.
Article in English | MEDLINE | ID: mdl-34801946

ABSTRACT

Podomycins A-L (1-12), 12 undescribed hypothemycin-type resorcylic acid lactones (RALs), were characterized from Podospora sp. G214, an endophyte harbored in the roots of Sanguisorba officinalis L. Their structures were addressed by spectroscopic data, X-ray crystallography, the modified Mosher's method, together with Mo2(OAc)4- and Rh2(OCOCF3)4-induced electronic circular dichroism (ICD) experiments. Podomycins A-C (1-3) represent the first class of natural RALs with a 13-membered macrolactone ring, while 4-12 are rearranged methoxycarbonyl substituted RALs. Biologically, compounds 2, 6, 8, 10, and 12 displayed immunosuppressive activities against T cell proliferation with IC50 values of 14.5-21.9 µM, and B cell proliferation with IC50 values of 22.3-36.5 µM, respectively. Further mechanism of action research demonstrated that podomycin F (6) distinctly induced apoptosis in activated T cells via MAPKs/AKT pathway.


Subject(s)
Apoptosis/drug effects , Immunosuppressive Agents/pharmacology , Lactones/pharmacology , Podospora/chemistry , T-Lymphocytes/drug effects , Animals , B-Lymphocytes/drug effects , B-Lymphocytes/metabolism , Cell Proliferation/drug effects , Dose-Response Relationship, Drug , Immunosuppressive Agents/chemistry , Immunosuppressive Agents/isolation & purification , Lactones/chemistry , Lactones/isolation & purification , MAP Kinase Signaling System , Male , Mice , Mice, Inbred BALB C , Molecular Structure , Proto-Oncogene Proteins c-akt , Structure-Activity Relationship , T-Lymphocytes/metabolism
10.
J Nat Prod ; 84(11): 2808-2821, 2021 11 26.
Article in English | MEDLINE | ID: mdl-34726063

ABSTRACT

Chromatographic fractionation of Sigesbeckia glabrescens led to the identification of 10 new sesquiterpene lactones, named siegesbeckialides I-O (1-7) and glabrescones A-C (8-10), along with 14 known analogues. An anti-inflammatory activity assay showed that siegesbeckialide I (1) most potently inhibited LPS-induced NO production in RAW264.7 murine macrophages. Furthermore, siegesbeckialide I suppressed the protein expression of iNOS and COX2, as well as the release of PGE2, IL-1ß, IL-6, and TNF-α in LPS-stimulated RAW264.7 cells. Mechanistically, siegesbeckialide I directly binds to inhibitors of IKKα/ß and suppresses their phosphorylation. This leads to the inhibition of IKKα/ß-mediated phosphorylation and degradation of inhibitor α of NF-κB (IκBα), as well as the activation of NF-κB signaling.


Subject(s)
Anti-Inflammatory Agents/pharmacology , Asteraceae/chemistry , I-kappa B Kinase/antagonists & inhibitors , Lactones/pharmacology , Sesquiterpenes/pharmacology , Animals , Anti-Inflammatory Agents/chemistry , Anti-Inflammatory Agents/isolation & purification , HEK293 Cells , Humans , Lactones/chemistry , Lactones/isolation & purification , Lipopolysaccharides/pharmacology , Mice , NF-kappa B/physiology , Phosphorylation , RAW 264.7 Cells , Sesquiterpenes/chemistry , Sesquiterpenes/isolation & purification
11.
Int J Mol Sci ; 22(19)2021 Oct 03.
Article in English | MEDLINE | ID: mdl-34639057

ABSTRACT

Ferula penninervis Regel & Schmalh. is a perennial plant used in Kazakh traditional folk medicine to treat epilepsy, neurosis, rheumatism, gastroduodenal ulcers, dyspepsia, wounds, abscesses or tumors. The aim of this work was to isolate series of sesquiterpene lactones from a crude methanolic root extract and investigate their in vitro cytotoxic potential against androgen-dependent prostate cancer LNCaP and epithelial prostate PNT2 cells, as well as to evaluate their melanin production inhibitory effects in murine melanoma B16F10 cells stimulated with α-melanocyte-stimulating hormone (αMSH). Two new (penninervin P and penninervin Q) and five known (olgin, laferin, olgoferin, oferin and daucoguainolactone F) guaiane-type sesquiterpene lactones were isolated with the use of a simple and fast liquid-liquid chromatography method. Olgin and laferin showed the most promising cytotoxic effects in LNCaP cells (IC50 of 31.03 and 23.26 µg/mL, respectively). Additionally, olgin, laferin, olgoferin, and oferin (10 µg/mL) potently impaired melanin release (40.67-65.48% of αMSH + cells) without influencing the viability of B16F10 cells. In summary, our findings might indicate that guaiane-type sesquiterpene lactones from F. penninervis could be regarded as promising candidates for further research in discovering new therapeutic agents with anti-prostate cancer and skin depigmentation properties.


Subject(s)
Chromatography, Liquid , Ferula/chemistry , Lactones/isolation & purification , Lactones/pharmacology , Melanins/antagonists & inhibitors , Sesquiterpenes, Guaiane/isolation & purification , Sesquiterpenes, Guaiane/pharmacology , Animals , Antineoplastic Agents , Antineoplastic Agents, Phytogenic/chemistry , Antineoplastic Agents, Phytogenic/isolation & purification , Antineoplastic Agents, Phytogenic/pharmacology , Cell Survival/drug effects , Chromatography, Liquid/methods , Dose-Response Relationship, Drug , Humans , Lactones/chemistry , Melanoma, Experimental , Mice , Molecular Structure , Plant Extracts/chemistry , Plant Roots/chemistry , Sesquiterpenes, Guaiane/chemistry , Spectrum Analysis
12.
Bioorg Chem ; 116: 105351, 2021 11.
Article in English | MEDLINE | ID: mdl-34583199

ABSTRACT

In the search for bioactive compounds from natural sources against cancer and inflammation, Calea jamaicensis (L.) L., a plant endemic to Panama, was investigated. Using multiple chromatographic steps, seventeen sesquiterpene lactones together with nine chromene derivatives were isolated from the non-polar extract of the plant. Among them, fourteen sesquiterpene lactones and three chromanes are described herein for the first time. Structure elucidation was achieved by extensive spectroscopic analysis and comparison with reported data. The isolated sesquiterpene lactones were tested against HeLa, SK-MEL-28 and HePG2 cancerous cell lines for their cytotoxic effects, as well as in the ICAM-1 assay for their anti-inflammatory potential. This study revealed strong cytotoxic agents on the one hand and strong inhibitors on the other. The compounds inhibited the TNF-α induced ICAM-1 expression on the endothelial HMEC-1 cells in a dose-dependent manner and with no toxicity observed on this non-cancerous cell line. In addition to the well-known cytotoxic activities of sesquiterpene lactones, further exploration may offer a novel therapeutic approach to cope with inflammatory diseases and the genus Calea may serve as a biobank for the isolation of potential phytopharmaceuticals, which could be utilized as leads in drug discovery and therapy.


Subject(s)
Anti-Inflammatory Agents/pharmacology , Antineoplastic Agents, Phytogenic/pharmacology , Asteraceae/chemistry , Lactones/pharmacology , Sesquiterpenes/pharmacology , Tumor Necrosis Factor-alpha/antagonists & inhibitors , Anti-Inflammatory Agents/chemistry , Anti-Inflammatory Agents/isolation & purification , Antineoplastic Agents, Phytogenic/chemistry , Antineoplastic Agents, Phytogenic/isolation & purification , Cell Line, Tumor , Cell Proliferation/drug effects , Dose-Response Relationship, Drug , Drug Screening Assays, Antitumor , Humans , Intercellular Adhesion Molecule-1/genetics , Intercellular Adhesion Molecule-1/metabolism , Lactones/chemistry , Lactones/isolation & purification , Molecular Structure , Sesquiterpenes/chemistry , Sesquiterpenes/isolation & purification , Structure-Activity Relationship , Tumor Necrosis Factor-alpha/pharmacology
13.
Sci Rep ; 11(1): 18794, 2021 09 22.
Article in English | MEDLINE | ID: mdl-34552113

ABSTRACT

The demand for natural food flavorings increases every year. Biotransformation has become an attractive approach to obtain natural products. In this work, enantiomerically pure (R)-(+)-δ-decalactone was obtained by reduction of the C=C double bond of natural massoia lactone in a continuous-flow reactor. Of 13 different ene-reductases isolated, purified and tested, OYE3 was found to be the most efficient biocatalyst. The selected biocatalyst, either in the form of purified enzyme, cell lysate, whole cells or immobilized cells, was tested in the batch system as well as in the packed-bed flow bioreactor. The biotransformation performed in batch mode, using Ca2+-alginate immobilized cells of Escherichia coli BL21(DE3)/pET30a-OYE3, furnished the desired product with complete conversion in 30 min. The process was intensified using a continuous-flow reactor-membrane filtration system (flow 0.1 mL/min, substrate concentration 10 mM, pH 7, 24 °C) with cell lysate as biocatalyst combined with a cofactor regeneration system, which allowed obtaining > 99% bioconversion of massoia lactone.


Subject(s)
Bioreactors , Lactones/metabolism , Oxidoreductases/metabolism , Bacillus megaterium/enzymology , Bacillus megaterium/metabolism , Cells, Immobilized/metabolism , Cryptocarya/chemistry , Escherichia coli/enzymology , Escherichia coli/metabolism , Lactones/isolation & purification , Metabolic Networks and Pathways , Plant Bark/chemistry , Silver Nitrate
14.
Mol Biol Rep ; 48(9): 6249-6258, 2021 Sep.
Article in English | MEDLINE | ID: mdl-34478011

ABSTRACT

BACKGROUND: Britannin, a Sesquiterpene Lactone isolated from Inula aucheriana, has recently gained attraction in the therapeutic fields due to its anti-tumor properties. This study was designed to evaluate the effect of this agent on Acute Lymphoblastic Leukemia (ALL) cell lines, either as a monotherapy or in combination with Vincristine (VCR). METHODS AND RESULTS: To determine the anti-leukemic effects of Britannin on ALL-derived cell lines and suggest a mechanism of action for the agent, we used MTT assay, Annexin-V/PI staining, ROS assay, and real-time PCR analysis. Moreover, by using a combination index (CI), we evaluated the synergistic effect of Britannin on Vincristine. We found that unlike normal Peripheral Blood Mononuclear Cells (PBMCs) and L929 cells, Britannin reduced the viability of NALM-6, REH, and JURKAT cells. Among tested cells, NALM-6 cells had the highest sensitivity to Britannin, and this agent was able to induce p21/p27-mediated G1 cell cycle arrest and Reactive Oxygen Specious (ROS)-mediated apoptotic cell death in this cell line. When NALM-6 cells were treated with Nacetyl-L-Cysteine (NAC), a scavenger of ROS, Britannin could induce neither apoptosis nor reduce the survival of the cells suggesting that the cytotoxic effect of Britannin is induced through ROS-dependent manner. Moreover, we found that a low dose of Britannin enhanced the effect of Vincristine in NALM-6 cells by inducing apoptotic cell death via altering the expression of apoptotic-related genes. CONCLUSIONS: Overall, our results proposed a mechanism for the cytotoxic effect of Britannin, either as a single agent or in combination with Vincristine, in NALM-6 cells.


Subject(s)
Antineoplastic Agents, Phytogenic/pharmacology , Apoptosis/drug effects , Catharanthus/chemistry , Inula/chemistry , Lactones/pharmacology , Phytochemicals/pharmacology , Plant Extracts/pharmacology , Precursor Cell Lymphoblastic Leukemia-Lymphoma/metabolism , Reactive Oxygen Species/metabolism , Sesquiterpenes/pharmacology , Vincristine/pharmacology , Acetylcysteine/pharmacology , Antineoplastic Agents, Phytogenic/isolation & purification , Cell Survival/drug effects , Drug Synergism , Free Radical Scavengers/pharmacology , G1 Phase Cell Cycle Checkpoints/drug effects , Humans , Jurkat Cells , Lactones/isolation & purification , Leukocytes, Mononuclear/drug effects , Leukocytes, Mononuclear/metabolism , Phytochemicals/isolation & purification , Plant Extracts/isolation & purification , Precursor Cell Lymphoblastic Leukemia-Lymphoma/pathology , Sesquiterpenes/isolation & purification , Signal Transduction/drug effects
15.
Drug Des Devel Ther ; 15: 3523-3533, 2021.
Article in English | MEDLINE | ID: mdl-34408404

ABSTRACT

BACKGROUND: Cancer is a leading cause of death worldwide, with breast cancer being the most common invasive cancer type in women. Several therapeutic strategies have been explored to reduce the mortality rates of breast cancer. Chemotherapy is the most commonly used systemic treatment, but associated with numerous side-effects. Development of anticancer agents with high efficacy and minimal negative effects is therefore an important focus of research. Natural materials provide an excellent source of bioactive compounds. For instance, Garcinia porrecta from the Clusiaceae family has multiple pharmacological activities, including antioxidant, anti-inflammatory, antibacterial, antiviral, anti-HIV, antidepressant, and anticancer properties. PURPOSE: The main objective of this study was to investigate the potential anticancer effects of compounds extracted from the bark of G. porrecta. MATERIALS AND METHODS: Our experiments were divided into three steps: (1) chromatographic isolation of compounds using various separation techniques, such as extraction, separation and purification, (2) characterization via infrared (IR), nuclear magnetic resonance (NMR) and mass spectroscopy, and (3) evaluation of anticancer activity in vitro (MTT assay) and in silico (via analysis of molecular docking against caspase-9, tumor necrosis factor alpha (TNF-α), estrogen receptor alpha (ER-α), and human epidermal growth factor receptor 2 (HER-2)). RESULTS: Depsidone (1) and benzophenone (2) from the ethyl acetate extract of bark of G. porrecta were identified as bioactive components. Examination of the activities of these compounds against MCF-7 cells revealed an IC50 value of 119.3 µg/mL for benzophenone, whereas IC50 for depsidone could not be estimated. Benzophenone activity was lower than that of the positive control doxorubicin (6.9 µg/mL). Depsidone showed the highest binding affinity for HER-2 (-9.2 kcal.mol-1) and benzophenone for ER-α (-8.0 kcal.mol-1). CONCLUSION: Benzophenone displays potency as an anticancer agent through blocking ER-α.


Subject(s)
Breast Neoplasms/drug therapy , Garcinia/chemistry , Phenols/pharmacology , Plant Extracts/pharmacology , Antineoplastic Agents, Phytogenic/chemistry , Antineoplastic Agents, Phytogenic/isolation & purification , Antineoplastic Agents, Phytogenic/pharmacology , Benzophenones/administration & dosage , Benzophenones/isolation & purification , Benzophenones/pharmacology , Depsides/administration & dosage , Depsides/isolation & purification , Depsides/pharmacology , Doxorubicin/pharmacology , Estrogen Receptor alpha/antagonists & inhibitors , Female , Humans , Inhibitory Concentration 50 , Lactones/administration & dosage , Lactones/isolation & purification , Lactones/pharmacology , MCF-7 Cells , Molecular Docking Simulation , Phenols/chemistry , Phenols/isolation & purification , Plant Extracts/chemistry
16.
Molecules ; 26(15)2021 Jul 29.
Article in English | MEDLINE | ID: mdl-34361731

ABSTRACT

Strigolactones (SLs) are a class of sesquiterpenoid plant hormones that play a role in the response of plants to various biotic and abiotic stresses. When released into the rhizosphere, they are perceived by both beneficial symbiotic mycorrhizal fungi and parasitic plants. Due to their multiple roles, SLs are potentially interesting agricultural targets. Indeed, the use of SLs as agrochemicals can favor sustainable agriculture via multiple mechanisms, including shaping root architecture, promoting ideal branching, stimulating nutrient assimilation, controlling parasitic weeds, mitigating drought and enhancing mycorrhization. Moreover, over the last few years, a number of studies have shed light onto the effects exerted by SLs on human cells and on their possible applications in medicine. For example, SLs have been demonstrated to play a key role in the control of pathways related to apoptosis and inflammation. The elucidation of the molecular mechanisms behind their action has inspired further investigations into their effects on human cells and their possible uses as anti-cancer and antimicrobial agents.


Subject(s)
Antineoplastic Agents/pharmacology , Heterocyclic Compounds, 3-Ring/pharmacology , Lactones/pharmacology , Mycorrhizae/metabolism , Plant Growth Regulators/pharmacology , Plants/metabolism , Sesquiterpenes/pharmacology , Adaptation, Physiological , Agriculture/methods , Agrochemicals/isolation & purification , Agrochemicals/metabolism , Agrochemicals/pharmacology , Anti-Bacterial Agents/biosynthesis , Anti-Bacterial Agents/isolation & purification , Anti-Bacterial Agents/pharmacology , Antineoplastic Agents/isolation & purification , Antineoplastic Agents/metabolism , Apoptosis/drug effects , Heterocyclic Compounds, 3-Ring/isolation & purification , Heterocyclic Compounds, 3-Ring/metabolism , Humans , Inflammation/prevention & control , Lactones/isolation & purification , Lactones/metabolism , Mycorrhizae/chemistry , Neoplasms/drug therapy , Patents as Topic , Plant Growth Regulators/biosynthesis , Plant Growth Regulators/isolation & purification , Plants/chemistry , Sesquiterpenes/isolation & purification , Sesquiterpenes/metabolism , Stress, Physiological , Weed Control/methods
17.
Chem Biodivers ; 18(9): e2100362, 2021 Sep.
Article in English | MEDLINE | ID: mdl-34254435

ABSTRACT

In the present study, five known γ-lactones (majoranolide B - 1, majorenolide - 2, majorynolide - 3, lincomolide D - 4, and isolinderanolide E - 5), as well as a new one (perseanolide - 6), were isolated from Persea fulva and P. americana. All isolated compounds exhibited potential activity against trypomastigote forms of Trypanosoma cruzi, whereas compounds 2 (EC50 of 4.8 µM) and 6 (EC50 of 3.6 µM) displayed superior activity than the positive control benznidazole (EC50 of 16.4 µM), with selectivity index (SI) values of 17.8 and >55.6, respectively (benznidazole, SI>12.2). Molecular docking studies were performed for 1-6 against six T. cruzi molecular targets. Using this approach, we observed that, even though perseanolide (6) showed favorable docking to several studied targets, the results were especially promising for hypoxanthine phosphoribosyl transferase (PDB 1TC1). As PDB 1TC1 is associated to the transference of a monophosphorylated ribose from phosphoribosylpyrophosphate (PRPP) in the ribonucleotide synthesis pathway, this interaction may affect the survival of T. cruzi in mammalian cells. The data herein also indicate that possible intermolecular interactions between 6 and PDB 1TC1 derive from (i) hydrogen bonds in the α,ß-unsaturated-γ-lactone unity and (ii) hydrophobic interactions in the long-chain alkyl group. Based on our results, perseanolide (6), reported for the first time in this work, can auspiciously contribute to future works regarding new trypanocidal agents.


Subject(s)
Lactones/pharmacology , Persea/chemistry , Trypanocidal Agents/pharmacology , Trypanosoma cruzi/drug effects , Lactones/chemistry , Lactones/isolation & purification , Molecular Docking Simulation , Molecular Structure , Parasitic Sensitivity Tests , Trypanocidal Agents/chemistry , Trypanocidal Agents/isolation & purification
18.
Molecules ; 26(12)2021 Jun 17.
Article in English | MEDLINE | ID: mdl-34204472

ABSTRACT

The ostrich oil of Struthio camelus (Ratite) found uses in folk medicine as an anti-inflammatory in eczema and contact dermatitis. The anti-inflammatory effect of a γ-lactone (5-hexyl-3H-furan-2-one) isolated from ostrich oil and its formulated nano-emulsion in formalin-induced paw edema was investigated in this study. Ostrich oil was saponified using a standard procedure; the aqueous residue was fractionated, purified, and characterized as γ-lactone (5-hexyl-3H-furan-2-one) through the interpretation of IR, NMR, and MS analyses. The γ-lactone was formulated as nano-emulsion using methylcellulose (MC) for oral solubilized form. The γ-lactone methylcellulose nanoparticles (γ-lactone-MC-NPs) were characterized for their size, shape, and encapsulation efficiency with a uniform size of 300 nm and 59.9% drug content. The γ-lactone was applied topically, while the formulated nanoparticles (NPs) were administered orally to rats. A non-steroidal anti-inflammatory drug (diclofenac gel) was used as a reference drug for topical use and ibuprofen suspension for oral administration. Edema was measured using the plethysmograph method. Both γ-lactone and γ-lactone-MC-NPs showed reduction of formalin-induced paw edema in rats and proved to be better than the reference drugs; diclofenac gel and ibuprofen emulsion. Histological examination of the skin tissue revealed increased skin thickness with subepidermal edema and mixed inflammatory cellular infiltration, which were significantly reduced by the γ-lactone compared to the positive control (p-value = 0.00013). Diuretic and toxicity studies of oral γ-lactone-MC-NPs were performed. No diuretic activity was observed. However, lethargy, drowsiness, and refusal to feeding observed may limit its oral administration.


Subject(s)
Lactones/isolation & purification , Lactones/pharmacology , Struthioniformes/metabolism , Administration, Oral , Administration, Topical , Animals , Anti-Inflammatory Agents/isolation & purification , Anti-Inflammatory Agents/pharmacology , Diclofenac/administration & dosage , Diclofenac/pharmacology , Edema/drug therapy , Emulsions/pharmacology , Formaldehyde/adverse effects , Ibuprofen/administration & dosage , Ibuprofen/pharmacology , Male , Palaeognathae/metabolism , Rats , Rats, Wistar , Skin/drug effects
19.
Molecules ; 26(13)2021 Jun 24.
Article in English | MEDLINE | ID: mdl-34202760

ABSTRACT

A phytochemical investigation of the leaves of the medicinal plant Isodon rubescens led to the isolation of the two new degraded abietane lactone diterpenoids rubesanolides F (1) and G (2). Their structures were elucidated based on the analyses of the HRESIMS and 1D/2D NMR spectral data, and their absolute configurations were determined by ECD spectrum calculations and X-ray single crystal diffraction methods. Compounds 1 and 2, with a unique γ-lactone subgroup between C-8 and C-20, were found to form a carbonyl carbon at C-13 by removal of the isopropyl group in an abietane diterpene skeleton. Rubesanolide G (2) is a rare case of abietane that possesses a cis-fused configuration between rings B and C. The two isolates were evaluated for their biological activities against two cancer cell lines (A549 and HL60), three fungal strains (Candida alba, Aspergillus niger and Rhizopus nigricans) and three bacterial strains (Escherichia coli, Staphylococcus aureus and Bacillus subtilis).


Subject(s)
Abietanes , Anti-Infective Agents , Antineoplastic Agents, Phytogenic , Bacteria/growth & development , Fungi/growth & development , Isodon/chemistry , Lactones , Neoplasms/drug therapy , Plant Leaves/chemistry , A549 Cells , Abietanes/chemistry , Abietanes/isolation & purification , Abietanes/pharmacology , Anti-Infective Agents/chemistry , Anti-Infective Agents/isolation & purification , Anti-Infective Agents/pharmacology , Antineoplastic Agents, Phytogenic/chemistry , Antineoplastic Agents, Phytogenic/isolation & purification , Antineoplastic Agents, Phytogenic/pharmacology , HL-60 Cells , Humans , Lactones/chemistry , Lactones/isolation & purification , Lactones/pharmacology , Neoplasms/metabolism , Neoplasms/pathology
20.
Food Chem ; 361: 130029, 2021 Nov 01.
Article in English | MEDLINE | ID: mdl-34077885

ABSTRACT

A novel automated method was developed for the quantitative determination of nine terpenoids that could contribute to the minty notes of red wine bouquet. The method couples headspace SPME-Arrow extraction with GC-MS/MS analysis. PDMS/DVB fiber was chosen for the extraction and an ionization energy of 30 eV permitted to optimize the analyte detection. The optimal sample preparation consists of a two-fold dilution of the wine sample with addition of 4 g of sodium chloride while the most suitable extraction conditions take place at 50 °C for 1 h. The method shows good linearity, intraday variations between 2 and 25%, interday variations between 7 and 23% and recoveries between 80 and 119%. The method exhibits the required low detection (between 3 and 60 ng/L) and quantification (between 6 ng/L and 200 ng/L) limits. These limits have permitted the quantification of the pool of minty terpenoids in fourteen red Bordeaux wines.


Subject(s)
Odorants/analysis , Solid Phase Microextraction/methods , Terpenes/isolation & purification , Wine/analysis , Cyclohexane Monoterpenes/analysis , Cyclohexane Monoterpenes/isolation & purification , Dimethylpolysiloxanes , Eucalyptol/analysis , Eucalyptol/isolation & purification , Gas Chromatography-Mass Spectrometry/methods , Lactones/analysis , Lactones/isolation & purification , Limonene/analysis , Limonene/isolation & purification , Mentha , Menthol/analysis , Menthol/isolation & purification , Polyvinyls , Tandem Mass Spectrometry/methods , Terpenes/analysis
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