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Mazzeo G, Fusè M, Bloino J, Evidente A, Abbate S, Longhi G. CPL of Mellein and Related Natural Compounds: Analysis of the ESIPT Phenomenon. Chemphyschem 2024:e202400543. [PMID: 38881499 DOI: 10.1002/cphc.202400543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/10/2024] [Accepted: 06/10/2024] [Indexed: 06/18/2024]
Abstract
(R)-(-)-Mellein, (3R,4R)-4-hydroxymellein and (3R,4S)-4-hydroxymellein obtained from fungi, i. e. from Diplodia globulosa, were investigated as a class of natural products presenting ESIPT (excited state intramolecular proton transfer) phenomenon, through fluorescence and CPL (circularly polarized luminescence). The study was preceded by the assessment of the absolute configuration through ECD and VCD (electronic and vibrational circular dichroism) spectroscopies in addition to NMR spectra. It is found that ESIPT takes place in these systems very rapidly, and no dual fluorescence has been observed. The experimental study is backed up by TD-DFT calculations of ECD and CPL spectra, plus MD calculations to follow proton transfer in the excited state and careful analysis of the puckering dynamics of the lactone ring. Deprotonated forms of the three compounds were also investigated by the same chiroptical experimental and theoretical methods, showing how one can find in natural compounds not only biological activity but also biologically compatible sensing probes.
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Affiliation(s)
- Giuseppe Mazzeo
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa,11, 25123, Brescia, Italy
| | - Marco Fusè
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa,11, 25123, Brescia, Italy
| | - Julien Bloino
- Scuola Normale Superiore, Piazza dei Cavalieri, 56125, Pisa, Italy
| | - Antonio Evidente
- Institute of Biomolecular Chemistry, National Research Council (CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Na), Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa,11, 25123, Brescia, Italy
- National Institute of Optics - CNR, Brescia Research Unit, via Branze 45, 25123, Brescia, Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa,11, 25123, Brescia, Italy
- National Institute of Optics - CNR, Brescia Research Unit, via Branze 45, 25123, Brescia, Italy
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2
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Bunyapaiboonsri T, Yoiprommarat S, Nithithanasilp S, Choowong W, Preedanon S, Suetrong S. Two new farnesyl hydroquinones from Pestalotiopsis diploclisia (BCC 35283), the fungus associated with algae. Nat Prod Res 2023; 37:24-30. [PMID: 34187248 DOI: 10.1080/14786419.2021.1946536] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Two new hydroquinones bearing a 1,3-enyne moiety, pestalotioquinols G and H, together with four known compounds, including pestalotioquinol A, phomonitroester, (R)-4,6,8-trihydroxy-3,4-dihydronaphthalen-1(2H)-one, and scylatone were isolated from the marine fungus Pestalotiopsis diploclisia (BCC 35283). The structures of these compounds were elucidated by analysis of 2D-NMR and HR-MS data. The known pestalotioquinol A displayed antimalarial activity against Plasmodium falciparum K1 with an IC50 value of 19.0 μM, while pestalotioquinol G displayed weak cytotoxic activity against Vero cell lines with an IC50 value of 47.9 μM.
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Affiliation(s)
- Taridaporn Bunyapaiboonsri
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, Thailand
| | - Seangaroon Yoiprommarat
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, Thailand
| | - Sutichai Nithithanasilp
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, Thailand
| | - Wilunda Choowong
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, Thailand
| | - Sita Preedanon
- National Biobank of Thailand (NBT), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, Thailand
| | - Satinee Suetrong
- National Biobank of Thailand (NBT), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, Thailand
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Quan KT, Park I, Kim CS, Yoshida W, Ferreira D, Thuong PT, Kim YH, Na M, Oh J. Configurational Assignment of a Flexible Benzo[ g]isochromene Stereodiad from Rubia philippinensis and Inhibition of Soluble Epoxide Hydrolase Activity. JOURNAL OF NATURAL PRODUCTS 2021; 84:2594-2599. [PMID: 34427436 DOI: 10.1021/acs.jnatprod.1c00037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A new benzo[g]isochromene possessing a conformationally mobile moiety was identified from Rubia philippinensis. The 2D structure was established utilizing spectrometric and spectroscopic techniques with variable temperatures. The configurational investigation of the flexible moiety was investigated utilizing contemporary NMR-combined computational tools such as DP4, direct J-DP4, and DP4 Plus. The probabilities computed from DP4 Plus analysis, featuring inclusion of an additional geometry optimization process, demonstrated more conclusive probability scores among the analyses used. The configurational assignment was also supported by compositional and molecular orbital analyses. Compound 1 inhibited soluble epoxide hydrolase (IC50 = 0.6 ± 0.01 μM), an enzyme associated with cardiovascular disorders.
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Affiliation(s)
- Khong Trong Quan
- College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
| | - InWha Park
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute, Gangneung 25451, Republic of Korea
| | - Chung Sub Kim
- School of Pharmacy and Department of Biopharmaceutical Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Wesley Yoshida
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Daneel Ferreira
- Department of BioMolecular Sciences, Division of Pharmacognosy, Research Institute of Pharmaceutical Sciences, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, United States
| | - Phuong Thien Thuong
- Biotechnology Division, Vietnam-Korea Institute of Science and Technology, Hanoi, Vietnam
| | - Young Ho Kim
- College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
| | - MinKyun Na
- College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Joonseok Oh
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Institute of Biomolecular Design and Discovery, Yale University, West Haven, Connecticut 06516, United States
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4
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Padula D, Mazzeo G, Santoro E, Scafato P, Belviso S, Superchi S. Amplification of the chiroptical response of UV-transparent amines and alcohols by N-phthalimide derivatization enabling absolute configuration determination through ECD computational analysis. Org Biomol Chem 2020; 18:2094-2102. [PMID: 32107518 DOI: 10.1039/d0ob00052c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The stereoselective transformation of chiral UV-transparent amines and alcohols to phthalimides has proved to be a simple and efficient method to enhance the chiroptical response of these substrates allowing their reliable absolute configuration determination by computational analysis of ECD spectra. Such a transformation also leads to a significant reduction in the molecular conformational flexibility thus simplifying the conformational analysis required by the computational treatment. The method described herein thus allows the absolute configuration assignment to these challenging substrates to be much easier and reliable.
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Affiliation(s)
- Daniele Padula
- Dipartimento di Scienze, Università della Basilicata, via dell'Ateneo Lucano, 85100, Potenza, Italy.
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Cimmino A, Freda F, Santoro E, Superchi S, Evidente A, Cristofaro M, Masi M. α-Costic acid, a plant sesquiterpene with acaricidal activity against Varroa destructor parasitizing the honey bee. Nat Prod Res 2019; 35:1428-1435. [PMID: 31418584 DOI: 10.1080/14786419.2019.1652291] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The organic extract of the aerial parts of Dittrichia viscosa, a perennial native plant of the Mediterranean basin, showed a significant acaricidal activity against Varroa destructor, the parasite mite of Apis mellifera, commonly called honey bee. Among the metabolites isolated from the organic extract of this Asteraceae, α-costic acid showed to be one of the compounds responsible for the toxic activity exhibited by the crude plant extract on this parasite mite species. In addition to the toxic effect a clear acaricidal response has been recorded when the parasitic mite was exposed to 1 mg/mL concentration of α-costic acid while no effects have been showed on honey bees using the same compound at the same concentration. This finding suggests a potential use of α-costic acid to control Varroa mites. The possibility to reliably achieve absolute configuration of α-costic acid by DFT computational analysis of chiroptical spectra has been also demonstrated.†.
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Affiliation(s)
- Alessio Cimmino
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, Napoli, Italy
| | | | - Ernesto Santoro
- Dipartimento di Scienze, Università della Basilicata, Potenza, Italy
| | - Stefano Superchi
- Dipartimento di Scienze, Università della Basilicata, Potenza, Italy
| | - Antonio Evidente
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, Napoli, Italy
| | - Massimo Cristofaro
- BBCA onlus, Rome, Italy.,ENEA C.R. Casaccia, SSPT-BIOAG-PROBIO, Rome, Italy
| | - Marco Masi
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, Napoli, Italy
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Félix C, Salvatore MM, DellaGreca M, Meneses R, Duarte AS, Salvatore F, Naviglio D, Gallo M, Jorrín-Novo JV, Alves A, Andolfi A, Esteves AC. Production of toxic metabolites by two strains of Lasiodiplodia theobromae, isolated from a coconut tree and a human patient. Mycologia 2018; 110:642-653. [PMID: 30062925 DOI: 10.1080/00275514.2018.1478597] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Lasiodiplodia theobromae is a phytopathogenic fungus that causes diseases not only in a broad number of plant hosts but also occasionally in humans. The capacity of L. theobromae to produce bioactive metabolites at 25 C (environmental mean temperature) and at 37 C (body mean temperature) was investigated. Two strains, CAA019 and CBS339.90, isolated respectively from a coconut tree and a human patient were characterized. The phytotoxicity and cytotoxicity (on mammalian cells) of the secretomes of both strains of L. theobromae were investigated. Also, phytotoxicity and cytotoxicity of pure compounds were evaluated. The phytotoxicity of the secretome of strain CAA019 was higher than the phytotoxicity of the secretome of strain CBS339.90 at 25 C. However, the phytotoxicity for both strains decreased when they were grown at 37 C. Only the secretome of strain CBS339.90 grown at 37 C induced up to 90% Vero and 3T3 cell mortality. This supports the presence of different metabolites in the secretome of strains CAA019 and CBS339.90. Metabolites typical of L. theobromae were isolated and identified from organic extracts of the secretome of both strains (e.g., 3-indolecarboxylic acid, jasmonic acid, lasiodiplodin, four substituted 2-dihydrofuranones, two melleins, and cyclo-(Trp-Ala)). Also, metabolites such as scytalone, not previously reported for this species, were isolated and identified. Metabolite production is affected by strain and temperature. In fact, some metabolites are strain specific (e.g., lasiodiplodin) and some metabolites are temperature specific (e.g., jasmonic acid). Although more strains should be characterized, it may be anticipated that temperature tuning of secondary-metabolite production emerges as a putative contributing factor in the modulation of L. theobromae pathogenicity towards plants, and also towards mammalian cells.
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Affiliation(s)
- Carina Félix
- a Department of Biology, CESAM , University of Aveiro, Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
| | - Maria M Salvatore
- b Department of Chemical Sciences , University of Naples "Federico II" , 80126 Naples , Italy
| | - Marina DellaGreca
- b Department of Chemical Sciences , University of Naples "Federico II" , 80126 Naples , Italy
| | - Rodrigo Meneses
- a Department of Biology, CESAM , University of Aveiro, Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
| | - Ana S Duarte
- a Department of Biology, CESAM , University of Aveiro, Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
| | - Francesco Salvatore
- b Department of Chemical Sciences , University of Naples "Federico II" , 80126 Naples , Italy
| | - Daniele Naviglio
- b Department of Chemical Sciences , University of Naples "Federico II" , 80126 Naples , Italy
| | - Monica Gallo
- c Department of Molecular Medicine and Medical Biotechnology , University of Naples "Federico II" , 80131 Naples , Italy
| | - Jesús V Jorrín-Novo
- d Agricultural and Plant Biochemistry and Proteomics Research Group, Department of Biochemistry and Molecular Biology , University of Cordoba , Cordoba , Spain
| | - Artur Alves
- a Department of Biology, CESAM , University of Aveiro, Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
| | - Anna Andolfi
- b Department of Chemical Sciences , University of Naples "Federico II" , 80126 Naples , Italy
| | - Ana C Esteves
- a Department of Biology, CESAM , University of Aveiro, Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
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Oh J, Patel J, Park HB, Crawford JM. β-Lactam Biotransformations Activate Innate Immunity. J Org Chem 2018; 83:7173-7179. [PMID: 29616809 DOI: 10.1021/acs.joc.8b00241] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Antibiotics are widely prescribed to treat bacterial infections, but many of these drugs also affect patient immune responses. While the molecular mechanisms regulating these diverse immunomodulatory interactions are largely unknown, recent studies support two primary models: (1) antibiotics can alter immune function by directly interacting with human targets; and/or (2) antibiotics can indirectly affect immune responses via alteration of the human microbiota composition. Here, we describe results that could support a third model in which a nonimmunostimulatory antibiotic can be biotransformed by human microbiota members into an immunostimulatory product that lacks antibacterial activity. Specifically, we identified, characterized, and semisynthesized new biotransformation products derived from the β-lactams amoxicillin and ampicillin, antibiotics regularly prescribed in the clinic. The drug metabolism products were identified in bacterial cultures harboring β-lactamase, a common resistance determinant. One of the amoxicillin biotransformation products activated innate immunity, as assessed by NF-κB signaling in human leukemic monocytes, whereas amoxicillin itself exhibited no effect. Amoxicillin has previously been shown to have minimal long-term impact on human microbiota composition in clinical trial studies. Taken together, our results could support a broader immunomodulatory mechanism whereby antibiotics could indirectly regulate immune function in a stable, microbiome-dependent manner.
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Affiliation(s)
- Joonseok Oh
- Department of Chemistry , Yale University , New Haven , Connecticut 06520 , United States.,Chemical Biology Institute , Yale University , West Haven , Connecticut 06516 , United States
| | - Jaymin Patel
- Chemical Biology Institute , Yale University , West Haven , Connecticut 06516 , United States.,Department of Molecular, Cellular, and Developmental Biology , Yale University , New Haven , Connecticut 06520 , United States
| | - Hyun Bong Park
- Department of Chemistry , Yale University , New Haven , Connecticut 06520 , United States.,Chemical Biology Institute , Yale University , West Haven , Connecticut 06516 , United States
| | - Jason M Crawford
- Department of Chemistry , Yale University , New Haven , Connecticut 06520 , United States.,Chemical Biology Institute , Yale University , West Haven , Connecticut 06516 , United States.,Department of Microbial Pathogenesis , Yale School of Medicine , New Haven , Connecticut 06536 , United States
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8
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Coronado-Aceves EW, Gigliarelli G, Garibay-Escobar A, Zepeda RER, Curini M, López Cervantes J, Inés Espitia-Pinzón CI, Superchi S, Vergura S, Marcotullio MC. New Isoflavonoids from the extract of Rhynchosia precatoria (Humb. & Bonpl. ex Willd.) DC. and their antimycobacterial activity. JOURNAL OF ETHNOPHARMACOLOGY 2017; 206:92-100. [PMID: 28506901 DOI: 10.1016/j.jep.2017.05.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 05/05/2017] [Accepted: 05/11/2017] [Indexed: 05/23/2023]
Abstract
ETHNOPHARMACOLOGY RELEVANCE The evaluation of the antimycobacterial activity of extracts of medicinal plants used by Mayos against tuberculosis and respiratory problems, allowed the identification of Rhynchosia precatoria (Humb. & Bonpl. ex Willd.) DC (Fabaceae) as the best candidate to find new antimycobacterial compounds. AIM OF THE STUDY To isolate and characterize the compounds of R. precatoria responsible for the inhibitory and bactericidal activity against Mycobacterium tuberculosis H37Rv and Mycobacterium smegmatis ATCC 700084. To determine antimycobacterial synergistic effect of pure compounds and their selectivity index towards Vero cells. MATERIALS AND METHODS A total of six flavonoids were purified by silica gel column chromatography. Structural elucidation of the isolated compounds was achieved by using 1D and 2D NMR spectroscopy techniques. The configuration at the C-3 chiral center was established by quantum mechanical calculation of the electronic circular dichroism (ECD) spectrum. In vitro inhibitory and bactericidal activity against M. tuberculosis and M. smegmatis were determined with the redox indicator Alamar Blue (resazurin). Synergy was determined by X/Y quotient. Cytotoxicity was measured by MTT assay. RESULTS The isolated compounds were identified as precatorin A (1), precatorin B (2), precatorin C (3), lupinifolin (4), cajanone (5) and lupinifolinol (6). Compounds 1-3 are new. Compounds 1 to 5 inhibited the growth of M. tuberculosis (MIC ≥31.25µg/mL); compounds 1, 2, 4 and 5 killed the bacteria (MBC ≥31.25µg/mL) and also inhibited M. smegmatis (MIC ≥125µg/mL), while 1 and 4 also resulted bactericidal (MBC ≥125µg/mL). Compounds 4 and 5 presented synergistic effect (X/Y quotient value <0.5) at a concentration of 1/2 MIC of each compound in the combination. Cytotoxicity in murine macrophages (RAW 264.7 cells) gave IC50 values of 13.3-46.98µM, for compounds 1-5. CONCLUSIONS In this work we isolated two new isoflavanones (1 and 2), and one new isoflavone (3) with a weak antimycobacterial activity. The (3R) absolute configuration was assigned to 1 by computational analysis of its ECD spectrum and to 2 and 5 by similarity of their ECD spectra with that of 1. We are also reporting by first time, activity against virulent strain of M. tuberculosis for compounds 4 and 5 and their antimycobacterial synergistic effect.
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Affiliation(s)
- Enrique Wenceslao Coronado-Aceves
- Department of Chemistry-Biology, University of Sonora, Blvd. Luis Encinas y Rosales s/n, Hermosillo, Sonora 83000, Mexico; Department of Biotechnology and Alimentary Sciences, Technological Institute of Sonora, 5 de Febrero 818 Sur, 85000 Ciudad Obregon, Sonora, Mexico
| | - Giulia Gigliarelli
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo, 1-06123 Perugia, Italy
| | - Adriana Garibay-Escobar
- Department of Chemistry-Biology, University of Sonora, Blvd. Luis Encinas y Rosales s/n, Hermosillo, Sonora 83000, Mexico
| | - Ramón Enrique Robles Zepeda
- Department of Chemistry-Biology, University of Sonora, Blvd. Luis Encinas y Rosales s/n, Hermosillo, Sonora 83000, Mexico
| | - Massimo Curini
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo, 1-06123 Perugia, Italy
| | - Jaime López Cervantes
- Department of Biotechnology and Alimentary Sciences, Technological Institute of Sonora, 5 de Febrero 818 Sur, 85000 Ciudad Obregon, Sonora, Mexico
| | - Clara Inés Inés Espitia-Pinzón
- Immunology Department, Biomedical Research Institute, National Autonomous University of Mexico, 04510 DF, Mexico, Mexico
| | - Stefano Superchi
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Stefania Vergura
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Maria Carla Marcotullio
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo, 1-06123 Perugia, Italy.
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Tang JW, Wang WG, Li A, Yan BC, Chen R, Li XN, Du X, Sun HD, Pu JX. Polyketides from the endophytic fungus Phomopsis sp. sh917 by using the one strain/many compounds strategy. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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10
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(R)-(-)-Aloesaponol III 8-Methyl Ether from Eremurus persicus: A Novel Compound against Leishmaniosis. Molecules 2017; 22:molecules22040519. [PMID: 28338625 PMCID: PMC6154379 DOI: 10.3390/molecules22040519] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 03/14/2017] [Accepted: 03/20/2017] [Indexed: 11/16/2022] Open
Abstract
Leishmaniosis is a neglected tropical disease which affects several millions of people worldwide. The current drug therapies are expensive and often lack efficacy, mainly due to the development of parasite resistance. Hence, there is an urgent need for new drugs effective against Leishmania infections. As a part of our ongoing study on the phytochemical characterization and biological investigation of plants used in the traditional medicine of western and central Asia, in the present study, we focused on Eremurus persicus root extract in order to evaluate its potential in the treatment of leishmaniosis. As a result of our study, aloesaponol III 8-methyl ether (ASME) was isolated for the first time from Eremurus persicus root extract, its chemical structure elucidated by means of IR and NMR experiments and the (R) configuration assigned by optical activity measurements: chiroptical aspects were investigated with vibrational circular dichroism (VCD) and electronic circular dichroism (ECD) spectroscopies and DFT (density functional theory) quantum mechanical calculations. Concerning biological investigations, our results clearly proved that (R)-ASME inhibits Leishmania infantum promastigotes viability (IC50 73 µg/mL), inducing morphological alterations and mitochondrial potential deregulation. Moreover, it is not toxic on macrophages at the concentration tested, thus representing a promising molecule against Leishmania infections.
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Evidente M, Santoro E, Petrovic AG, Cimmino A, Koshoubu J, Evidente A, Berova N, Superchi S. Absolute configurations of phytotoxic inuloxins B and C based on experimental and computational analysis of chiroptical properties. PHYTOCHEMISTRY 2016; 130:328-34. [PMID: 27498046 DOI: 10.1016/j.phytochem.2016.07.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 07/03/2016] [Accepted: 07/20/2016] [Indexed: 05/23/2023]
Abstract
The absolute configuration of phytotoxins inuloxins B and C, produced by Inula viscosa, and with potential herbicidal activity for the management of parasitic plants, has been determined by Time-dependent density functional theory computational prediction of electronic circular dichroism and optical rotatory dispersion spectra. The inuloxin B has been converted to its 5-O-acetyl derivative, which due to its more constrained conformational features facilitated the computational analysis of its chiroptical properties. The analysis based on experimental and computed data led to assignment of absolute configuration to naturally occurring (+)-inuloxin B and (-)-inuloxin C as (7R,8R,10S,11S) and (5S,7S,8S,10S), respectively.
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Affiliation(s)
- Marco Evidente
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126, Napoli, Italy; Department of Chemistry, Columbia University, 3000 Broadway, 3114, New York, NY 10027, USA
| | - Ernesto Santoro
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Ana G Petrovic
- Department of Chemistry, Columbia University, 3000 Broadway, 3114, New York, NY 10027, USA; Department of Life Sciences, New York Institute of Technology (NYIT), 1855 Broadway, New York, NY 10023, USA
| | - Alessio Cimmino
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126, Napoli, Italy
| | - Jun Koshoubu
- JASCO Corporation, Hachioji-shi, Tokyo 192-8537, Japan
| | - Antonio Evidente
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126, Napoli, Italy.
| | - Nina Berova
- Department of Chemistry, Columbia University, 3000 Broadway, 3114, New York, NY 10027, USA.
| | - Stefano Superchi
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100 Potenza, Italy.
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