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  1. Article ; Online: Special Issue-"Natural Products That Might Change Society".

    Amen, Yhiya / Shimizu, Kuniyoshi

    Molecules (Basel, Switzerland)

    2024  Volume 29, Issue 5

    Abstract: This Special Issue ... ...

    Abstract This Special Issue of
    MeSH term(s) Humans ; Biological Products
    Chemical Substances Biological Products
    Language English
    Publishing date 2024-02-26
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules29051008
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  2. Article ; Online: Phytochemical, ethnomedicinal uses and pharmacological profile of

    Ullah, Sana / Amen, Yhiya / Shimizu, Kuniyoshi

    Natural product research

    2023  , Page(s) 1–11

    Abstract: ... Juncus ... ...

    Abstract Juncus decipiens
    Language English
    Publishing date 2023-06-13
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2185747-7
    ISSN 1478-6427 ; 1478-6419
    ISSN (online) 1478-6427
    ISSN 1478-6419
    DOI 10.1080/14786419.2023.2223749
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  3. Article ; Online: Bioactivity of Eriocephalus africanus essential oil against concanavalin A-induced hepatitis via suppressing immune cell infiltration, inhibiting TNF-α/NF-κB and IFN-γ/STAT1 signaling pathways

    Haikal, Abdullah / Galala, Amal A. / Elshal, Mahmoud / Amen, Yhiya / Gohar, Ahmed A.

    Journal of Ethnopharmacology. 2024 Jan., v. 318 p.117000-

    2024  

    Abstract: Eriocephalus africanus infusion is used as a diuretic and a diaphoretic and is also used in the treatment of gastrointestinal disorders and gynaecological conditions, inflammation and dermal disorders, asthma, coughs, fevers, and painful ailments. The ... ...

    Abstract Eriocephalus africanus infusion is used as a diuretic and a diaphoretic and is also used in the treatment of gastrointestinal disorders and gynaecological conditions, inflammation and dermal disorders, asthma, coughs, fevers, and painful ailments. The plant has been used traditionally as a medication to cure inflammation and skin problems. Studying E. africanus essential oil (EAEO) as a potential hepatoprotective measure against concanavalin (Con) A-induced hepatitis in mice and investigating its underlying mechanism. Hydro-distilled oil of the fresh plant aerial shoots is subjected to GC/MS analysis. Autoimmune hepatitis (AIH) was induced in mice by intravenous injection of Con A (15 mg/kg). EAEO was administered orally before Con A injection to test its hepatoprotective activity. GC/MS analysis revealed the presence of 22 compounds representing 99.43% of the oil components. The monoterpene artemisia ketone (41.02%) and the sesquiterpene juniper camphor (14.17%) are the major components. The in vivo study showed that the oil suppressed Con A-induced neutrophil and CD4+T cell infiltration into the liver, restored hepatic redox balance, inhibited Con A-induced elevation of tumor necrosis factor-alpha (TNF-α), interleukin (IL-6), and interferon-gamma (IFN-γ) hepatic levels which were correlated with its ability to suppress nuclear factor kappa B (NF-κB) and Signal Transducer and Activator of Transcription (STAT1) activation in the liver. EAEO showed hepatoprotective potential against Con A-induced hepatitis in mice collectively through selective anti-oxidant, anti-inflammatory, and anti-necrotic effects.
    Keywords Eriocephalus ; antioxidants ; asthma ; autoimmune hepatitis ; camphor ; essential oils ; gastrointestinal system ; hepatoprotective effect ; inflammation ; interferon-gamma ; interleukin-6 ; intravenous injection ; ketones ; liver ; neutrophils ; oils ; sesquiterpenoids ; signal transduction ; traditional medicine ; transactivators ; transcription factor NF-kappa B ; tumor necrosis factor-alpha ; Eriocephalus africanus var. africanus ; Essential oil ; Concanavalin A ; Artemisia ketone
    Language English
    Dates of publication 2024-01
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 134511-4
    ISSN 1872-7573 ; 0378-8741
    ISSN (online) 1872-7573
    ISSN 0378-8741
    DOI 10.1016/j.jep.2023.117000
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  4. Article ; Online: Unveiling the Antiviral Efficacy of Forskolin: A Multifaceted In Vitro and In Silico Approach.

    Amen, Yhiya / Selim, Mohamed A / Suef, Reda A / Sayed, Ahmed M / Othman, Ahmed

    Molecules (Basel, Switzerland)

    2024  Volume 29, Issue 3

    Abstract: ... Coleus ... ...

    Abstract Coleus forskohlii
    MeSH term(s) Colforsin/pharmacology ; Colforsin/chemistry ; Cathepsin L ; Molecular Docking Simulation ; Herpesvirus 1, Human/metabolism ; Antiviral Agents/pharmacology ; Antiviral Agents/chemistry
    Chemical Substances Colforsin (1F7A44V6OU) ; Cathepsin L (EC 3.4.22.15) ; Antiviral Agents
    Language English
    Publishing date 2024-02-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules29030704
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  5. Article ; Online: Anti-phototoxicity and anti-melanogenesis activities of eelgrass Zostera marina and its phenolic constituents.

    Elkattan, Amira / Amen, Yhiya / Matsumoto, Masako / Nagata, Maki / Mittraphab, Yanisa / Shimizu, Kuniyoshi

    Fitoterapia

    2024  Volume 173, Page(s) 105817

    Abstract: The eelgrass Zostera marina L. has several economic roles, from its earlier usage in the insulation industry to protecting the earth from global warming. In this study, we aimed to discover the cosmetic potential of Z. marina. A methanolic extract of Z. ... ...

    Abstract The eelgrass Zostera marina L. has several economic roles, from its earlier usage in the insulation industry to protecting the earth from global warming. In this study, we aimed to discover the cosmetic potential of Z. marina. A methanolic extract of Z. marina showed anti-phototoxicity and anti-melanogenesis activity with an IC
    MeSH term(s) Zosteraceae/chemistry ; Luteolin ; Molecular Structure ; Rosmarinic Acid ; Lactates
    Chemical Substances 3-phenyllactic acid (156-05-8) ; Luteolin (KUX1ZNC9J2) ; Rosmarinic Acid (MQE6XG29YI) ; Lactates
    Language English
    Publishing date 2024-01-02
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 412385-2
    ISSN 1873-6971 ; 0367-326X
    ISSN (online) 1873-6971
    ISSN 0367-326X
    DOI 10.1016/j.fitote.2023.105817
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Undescribed glucosylceramide, flavonol triglycoside, and oleanane saponin from the halophyte Agathophora alopecuroides: Promising candidates for stimulating ceramide synthesis.

    Othman, Ahmed / Amen, Yhiya / Nagata, Maki / Shimizu, Kuniyoshi

    Phytochemistry

    2022  Volume 202, Page(s) 113320

    Abstract: The phytochemical study of Agathophora alopecuroides (Chenopodiaceae) led to the isolation of previously undescribed glucosylceramide, flavonol triglycoside, and triterpene oleanane saponin, together with eight known compounds. Their structures were ... ...

    Abstract The phytochemical study of Agathophora alopecuroides (Chenopodiaceae) led to the isolation of previously undescribed glucosylceramide, flavonol triglycoside, and triterpene oleanane saponin, together with eight known compounds. Their structures were elucidated using NMR analysis and HR-MS as (2'R, 12E) N-[(2S, 3S, 4R)-1-(β-D-glucopyranosyloxy)-3,4-dihydroxy-octadec-2-yl]-2-hydroxytetracos-12-enamide, namely Agathophamide A; isorhamnetin-3-O-[β-D-xylopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→6)]-β-D-galactopyranoside, namely Agathophoroside A; and 3-O-[4'-(β-D-xylopyranosyl)-β-D-glucuronopyranosyl]-28-O-β-D-glucopyranosyl-olean-12-en-3β-ol-28-oic acid, namely Solysaponin A. We evaluated the effect of extract and isolates on ceramide levels via the up-regulated expression of the enzyme for ceramide synthesis in HaCaT keratinocytes. Interestingly, the study results revealed that the methanol extract of A. alopecuroides, together with some isolated compounds significantly up-regulated the mRNA expression of ceramide synthase-3 by 1.2- to 4.3-fold compared with the control in HaCaT cells. These findings indicate that the halophyte A. alopecuroides is a promising source of candidate compounds that can contribute to ceramide synthesis via the up-regulated expression levels of ceramide synthase-3 in the ceramide synthesis pathway.
    MeSH term(s) Chenopodiaceae ; Flavonols/pharmacology ; Glucosylceramides ; Oleanolic Acid/analogs & derivatives ; Plant Extracts/chemistry ; Salt-Tolerant Plants ; Saponins/chemistry ; Saponins/pharmacology ; Triterpenes/chemistry
    Chemical Substances Flavonols ; Glucosylceramides ; Plant Extracts ; Saponins ; Triterpenes ; oleanane ; Oleanolic Acid (6SMK8R7TGJ)
    Language English
    Publishing date 2022-07-14
    Publishing country England
    Document type Journal Article
    ZDB-ID 208884-8
    ISSN 1873-3700 ; 0031-9422
    ISSN (online) 1873-3700
    ISSN 0031-9422
    DOI 10.1016/j.phytochem.2022.113320
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  7. Article: Undescribed glucosylceramide, flavonol triglycoside, and oleanane saponin from the halophyte Agathophora alopecuroides: Promising candidates for stimulating ceramide synthesis

    Othman, Ahmed / Amen, Yhiya / Nagata, Maki / Shimizu, Kuniyoshi

    Phytochemistry. 2022 Oct., v. 202

    2022  

    Abstract: The phytochemical study of Agathophora alopecuroides (Chenopodiaceae) led to the isolation of previously undescribed glucosylceramide, flavonol triglycoside, and triterpene oleanane saponin, together with eight known compounds. Their structures were ... ...

    Abstract The phytochemical study of Agathophora alopecuroides (Chenopodiaceae) led to the isolation of previously undescribed glucosylceramide, flavonol triglycoside, and triterpene oleanane saponin, together with eight known compounds. Their structures were elucidated using NMR analysis and HR-MS as (2′R, 12E) N-[(2S, 3S, 4R)-1-(β-D-glucopyranosyloxy)-3,4-dihydroxy-octadec-2-yl]-2-hydroxytetracos-12-enamide, namely Agathophamide A; isorhamnetin-3-O-[β-D-xylopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→6)]-β-D-galactopyranoside, namely Agathophoroside A; and 3-O-[4'-(β-D-xylopyranosyl)-β-D-glucuronopyranosyl]-28-O-β-D-glucopyranosyl-olean-12-en-3β-ol-28-oic acid, namely Solysaponin A. We evaluated the effect of extract and isolates on ceramide levels via the up-regulated expression of the enzyme for ceramide synthesis in HaCaT keratinocytes. Interestingly, the study results revealed that the methanol extract of A. alopecuroides, together with some isolated compounds significantly up-regulated the mRNA expression of ceramide synthase-3 by 1.2- to 4.3-fold compared with the control in HaCaT cells. These findings indicate that the halophyte A. alopecuroides is a promising source of candidate compounds that can contribute to ceramide synthesis via the up-regulated expression levels of ceramide synthase-3 in the ceramide synthesis pathway.
    Keywords Amaranthaceae ; ceramides ; enzymes ; flavonols ; gene expression ; glucosylceramides ; halophytes ; keratinocytes ; methanol ; saponins ; triterpenoids
    Language English
    Dates of publication 2022-10
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 208884-8
    ISSN 1873-3700 ; 0031-9422
    ISSN (online) 1873-3700
    ISSN 0031-9422
    DOI 10.1016/j.phytochem.2022.113320
    Database NAL-Catalogue (AGRICOLA)

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  8. Article: Validation of the potential anti-inflammatory activity of Plumbago auriculata Lam

    Sherif, Asmaa E. / Amen, Yhiya / Shimizu, Kuniyoshi

    SAAB South African journal of botany. 2022 July, v. 147

    2022  

    Abstract: This study targets scientific validation of the claimed anti-inflammatory activity of Plumbago auriculata Lam. The total methanolic extract of the aerial parts of P. auriculata Lam. and its different fractions were evaluated for their anti-inflammatory ... ...

    Abstract This study targets scientific validation of the claimed anti-inflammatory activity of Plumbago auriculata Lam. The total methanolic extract of the aerial parts of P. auriculata Lam. and its different fractions were evaluated for their anti-inflammatory activity using carrageenan-induced paw edema model in rats followed by bio-guided isolation of the anti-inflammatory principles from the active fractions. As a result, sixteen compounds were isolated and identified based on different spectroscopic techniques. Two of them exhibited significant anti-inflammatory activities proved through inhibition of the paw swelling by 81.4 ± 0.2 and 85.2 ± 3.6% at a dose of 10 mg/kg, while the others exhibited varying activities. Throughout the study, some compounds are reported for the first time, of them, a unique polyoxygenated chromone-C-glucoside; biflorin together with a well-known coumarin; umbelliferone, are of a great importance for their chemotaxonomic significance of the studied species.
    Keywords Plumbago auriculata ; anti-inflammatory activity ; chemotaxonomy ; coumarin ; edema ; models ; spectroscopy ; umbelliferones
    Language English
    Dates of publication 2022-07
    Size p. 467-471.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 2126918-X
    ISSN 0254-6299
    ISSN 0254-6299
    DOI 10.1016/j.sajb.2022.01.028
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  9. Article ; Online: Acetylcholinesterase inhibitors from Conocarpus lancifolius Engl. (Combretaceae)

    Abdel Bar, Fatma M. / Salkini, Ayman A. / Amen, Yhiya / Sherif, Asmaa E.

    Natural Product Research. 2023 May 19, v. 37, no. 10 p.1668-1673

    2023  

    Abstract: Conocarpus lancifolius Engl. (Combretaceae) has several potential health-promoting effects, such as antidiabetic, antimicrobial, antioxidant, and cytotoxic effects. Phytochemical study of the ethyl acetate fraction of the leaf extract of this plant led ... ...

    Abstract Conocarpus lancifolius Engl. (Combretaceae) has several potential health-promoting effects, such as antidiabetic, antimicrobial, antioxidant, and cytotoxic effects. Phytochemical study of the ethyl acetate fraction of the leaf extract of this plant led to the isolation and identification of eight compounds viz., gallic acid (1), dihydromyricetin (2), myricetin (3), daucosterol (4), syringetin 3-O-β-D-glucopyranoside (5), quercetin 3-O-β-D-glucoside (6), gallocatechin (7), and (-)-epigallocatechin-3-O-gallate (8). Their acetylcholinesterase (AChE) in vitro and in silico inhibitory activities were evaluated. Daucosterol (4) showed the highest activity (IC₅₀ 0.316 μM) which was further validated by the superimposed docking orientation with the co-crystallized inhibitor, donepezil.
    Keywords Conocarpus ; acetylcholinesterase ; antioxidants ; computer simulation ; cytotoxicity ; epigallocatechin ; ethyl acetate ; gallic acid ; health promotion ; leaf extracts ; myricetin ; quercetin ; research ; Conocarpus lancifolius ; acetylcholinesterase inhibitor ; syringetin 3-O-glucoside ; dihydromyricetin
    Language English
    Dates of publication 2023-0519
    Size p. 1668-1673.
    Publishing place Taylor & Francis
    Document type Article ; Online
    ZDB-ID 2185747-7
    ISSN 1478-6427 ; 1478-6419
    ISSN (online) 1478-6427
    ISSN 1478-6419
    DOI 10.1080/14786419.2022.2103124
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  10. Article ; Online: A novel acylated flavonol tetraglycoside and rare oleanane saponins with a unique acetal-linked dicarboxylic acid substituent from the xero-halophyte Bassia indica.

    Othman, Ahmed / Amen, Yhiya / Shimizu, Kuniyoshi

    Fitoterapia

    2021  Volume 152, Page(s) 104907

    Abstract: In recent years, the scientific interest and particularly the economic significance of halophytic plants has been highly demanding due to the medicinal and nutraceutical potential of its bioactive compounds. A xero-halophyte Bassia indica is deemed to be ...

    Abstract In recent years, the scientific interest and particularly the economic significance of halophytic plants has been highly demanding due to the medicinal and nutraceutical potential of its bioactive compounds. A xero-halophyte Bassia indica is deemed to be a very cheap source of natural entities without chemical or biological investigation. In this context, a new acylated flavonol tetraglycoside, kaempferol-3-O-β-d-glucopyranosyl-(1→6)-O-[β-D-galactopyranosyl-(1→3)-2-O-trans-feruloyl-α-L-rhamnopyranosyl-(1→2)]-β-D-glucopyranoside (14), together with rare occurring flavonol triglycoside, isorhamnetin-3-O-β-d-glucopyranosyl-(1→6)-O-[α-L-rhamnopyranosyl-(1→2)]-β-D-glucopyranoside (15), were isolated from the aqueous methanol extract of the aerial parts of B. indica. The study also reported an optimal separation and characterization of a new seco-glycosidic oleanane saponin with 2'R,3'S stereocenters, identified as (2'R,3'S)-3-O-[2'-hydroxy-3'-(2"-O-glycolyl)-oxo-propionic acid-β-D-glucuronopyranosyl]-28-O-β-D-glucopyranosyl-olean-12-en-3β-ol-28-oic acid (17), in addition to its derivative, 3-O-[2'-(2"-O-glycolyl)-glyoxylyl-β-D-glucuronopyranosyl]-28-O-β-d-glucopyranosyl-olean-12-en-3β-ol-28-oic acid (16). The structures of all isolated compounds were elucidated based on 1D, 2D NMR, and HR-MS analysis, as well as comparing with similar derivatives published in the literature. Furthermore, thirteen known compounds were isolated and identified as β-sitosterol (1), vanillic acid (2), o-hydroxybenzoic acid (3), р-hydroxybenzoic acid (4), 6,7-dihydroxycoumarin (5), methyl caffeate (6), caffeic acid (7), quercetin (8), uracil (9), thymidine (10), tachioside (11), isorhamnetin-3-O-β-D-glucopyranoside (12), kaempferol-3-O-rutinoside (13). The anticholinesterase activity of all isolated compounds was evaluated.
    MeSH term(s) Acetals ; Chenopodiaceae/chemistry ; Cholinesterase Inhibitors/isolation & purification ; Cholinesterase Inhibitors/pharmacology ; Dicarboxylic Acids ; Egypt ; Flavonols/isolation & purification ; Flavonols/pharmacology ; Glycosides/isolation & purification ; Glycosides/pharmacology ; Molecular Structure ; Oleanolic Acid/analogs & derivatives ; Oleanolic Acid/isolation & purification ; Oleanolic Acid/pharmacology ; Phytochemicals/isolation & purification ; Phytochemicals/pharmacology ; Plant Components, Aerial/chemistry ; Salt-Tolerant Plants/chemistry ; Saponins/isolation & purification ; Saponins/pharmacology
    Chemical Substances Acetals ; Cholinesterase Inhibitors ; Dicarboxylic Acids ; Flavonols ; Glycosides ; Phytochemicals ; Saponins ; oleanane ; Oleanolic Acid (6SMK8R7TGJ)
    Language English
    Publishing date 2021-04-20
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 412385-2
    ISSN 1873-6971 ; 0367-326X
    ISSN (online) 1873-6971
    ISSN 0367-326X
    DOI 10.1016/j.fitote.2021.104907
    Database MEDical Literature Analysis and Retrieval System OnLINE

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