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Küçüksolak M, Yılmaz S, Ballar-Kırmızıbayrak P, Bedir E. Potent telomerase activators from a novel sapogenin via biotransformation utilizing Camarosporium laburnicola, an endophytic fungus. Microb Cell Fact 2023; 22:66. [PMID: 37024895 PMCID: PMC10080871 DOI: 10.1186/s12934-023-02069-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 03/23/2023] [Indexed: 04/08/2023] Open
Abstract
BACKGROUND Cycloartane-type triterpenoids possess important biological activities, including immunostimulant, wound healing, and telomerase activation. Biotransformation is one of the derivatization strategies of natural products to improve their bioactivities. Endophytic fungi have attracted attention in biotransformation studies because of their ability to perform modifications in complex structures with a high degree of stereospecificity. RESULTS This study focuses on biotransformation studies on cyclocephagenol (1), a novel cycloartane-type sapogenin from Astragalus species, and its 12-hydroxy derivatives (2 and 3) to obtain new telomerase activators. Since the hTERT protein levels of cyclocephagenol (1) and its 12-hydroxy derivatives (2 and 3) on HEKn cells were found to be notable, biotransformation studies were carried out on cyclocephagenol and its 12-hydroxy derivatives using Camarosporium laburnicola, an endophytic fungus isolated from Astragalus angustifolius. Later, immunoblotting and PCR-based ELISA assay were used to screen starting compounds and biotransformation products for their effects on hTERT protein levels and telomerase activation. All compounds showed improved telomerase activation compared to the control group. CONCLUSIONS As a result of biotransformation studies, seven new metabolites were obtained and characterized, verifying the potential of C. laburnicola as a biocatalyst. Additionally, the bioactivity results showed that this endophytic biocatalyst is unique in transforming the metabolites of its host to afford potent telomerase activators.
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Affiliation(s)
- Melis Küçüksolak
- Department of Bioengineering, Izmir Institute of Technology, Urla, 35430, İzmir, Türkiye, Turkey
| | - Sinem Yılmaz
- Department of Biotechnology, Graduate School of Natural and Applied Sciences, Ege University, Bornova, İzmir, Türkiye, Turkey
- Department of Bioengineering, Faculty of Engineering, University of Alanya Aladdin Keykubat, Antalya, Türkiye, Turkey
| | | | - Erdal Bedir
- Department of Bioengineering, Izmir Institute of Technology, Urla, 35430, İzmir, Türkiye, Turkey.
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Üner G, Bedir E, Serçinoğlu O, Kırmızıbayrak PB. Non-apoptotic cell death induction via sapogenin based supramolecular particles. Sci Rep 2022; 12:13834. [PMID: 35974087 PMCID: PMC9381536 DOI: 10.1038/s41598-022-17977-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 08/03/2022] [Indexed: 11/22/2022] Open
Abstract
The discovery of novel chemotherapeutics that act through different mechanisms is critical for dealing with tumor heterogeneity and therapeutic resistance. We previously reported a saponin analog (AG-08) that induces non-canonical necrotic cell death and is auspicious for cancer therapy. Here, we describe that the key element in triggering this unique cell death mechanism of AG-08 is its ability to form supramolecular particles. These self-assembled particles are internalized via a different endocytosis pathway than those previously described. Microarray analysis suggested that AG-08 supramolecular structures affect several cell signaling pathways, including unfolded protein response, immune response, and oxidative stress. Finally, through investigation of its 18 analogs, we further determined the structural features required for the formation of particulate structures and the stimulation of the unprecedented cell death mechanism of AG-08. The unique results of AG-08 indicated that supramolecular assemblies of small molecules are promising for the field of anticancer drug development, although they have widely been accepted as nuisance in drug discovery studies.
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Affiliation(s)
- Göklem Üner
- Department of Bioengineering, Faculty of Engineering, İzmir Institute of Technology, 35430, Urla, İzmir, Turkey
| | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, İzmir Institute of Technology, 35430, Urla, İzmir, Turkey.
| | - Onur Serçinoğlu
- Department of Bioengineering, Faculty of Engineering, Gebze Technical University, 41400, Gebze, Kocaeli, Turkey
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Yilmaz S, Bedir E, Ballar Kirmizibayrak P. The role of cycloastragenol at the intersection of NRF2/ARE, telomerase, and proteasome activity. Free Radic Biol Med 2022; 188:105-116. [PMID: 35718303 DOI: 10.1016/j.freeradbiomed.2022.06.230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/09/2022] [Accepted: 06/14/2022] [Indexed: 10/18/2022]
Abstract
Aging is well-characterized by the gradual decline of cellular functionality. As redox balance, proteostasis, and telomerase systems have been found to be associated with aging and age-related diseases, targeting these systems with small compounds has been considered a promising therapeutic approach. Cycloastragenol (CA), a small molecule telomerase activator obtained from Astragalus species, has been reported to positively affect several age-related pathophysiologies, but the mechanisms underlying CA activity have yet to be reported. Here, we presented that CA increased NRF2 nuclear localization and activity leading to upregulation of cytoprotective enzymes and attenuation of oxidative stress-induced ROS levels. Furthermore, CA-mediated induction of telomerase activity was found to be regulated by NRF2. CA not only increased the expression of hTERT but also its nuclear localization via upregulating the Hsp90-chaperon complex. In addition to modulating nuclear hTERT levels at unstressed conditions, CA alleviated oxidative stress-induced mitochondrial hTERT levels while increasing nuclear hTERT levels. Concomitantly, H2O2-induced mitochondrial ROS level was found to be significantly decreased by CA administration. Our data also revealed that CA strongly enhanced proteasome activity and assembly. More importantly, the proteasome activator effect of CA is dependent on the induction of telomerase activity, which is mediated by NRF2 system. In conclusion, our results not only revealed the cross-talk among NRF2, telomerase, and proteasome systems but also that CA functions at the intersection of these three major aging-related cellular pathways.
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Affiliation(s)
- Sinem Yilmaz
- Department of Biotechnology, Graduate School of Natural and Applied Sciences, Ege University, Bornova, Izmir, Turkey; Department of Bioengineering, Faculty of Engineering, University of Alanya Aladdin Keykubat, Antalya, Turkey
| | - Erdal Bedir
- Department of Bioengineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey.
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Gezer E, Üner G, Küçüksolak M, Kurt MÜ, Doğan G, Kırmızıbayrak PB, Bedir E. Undescribed polyether ionophores from Streptomyces cacaoi and their antibacterial and antiproliferative activities. Phytochemistry 2022; 195:113038. [PMID: 34902703 DOI: 10.1016/j.phytochem.2021.113038] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 06/14/2023]
Abstract
Polyether ionophores represent a large group of naturally occurring compounds mainly produced by Streptomyces species. With previously proven varieties of bioactivity including antibacterial, antifungal, antiparasitic, antiviral and anti-tumor effects, the discovery of undescribed polyethers leading to development of efficient therapeutics has become important. As part of our research on polyether-rich Streptomyces cacaoi, we previously performed modification studies on fermentation conditions to induce synthesis of specialized metabolites. Here, we report four undescribed and nine known polyether compounds from S. cacaoi grown in optimized conditions. Antimicrobial activity assays revealed that four compounds, including the undescribed (6), showed strong inhibitory effects over both Bacillus subtilis and methicillin-resistant Staphylococcus aureus (MRSA) growth. Additionally, K41-A and its C15-demethoxy derivative exhibited significant cytotoxicity. These results signified that selectivity of C15-demethoxy K41-A towards cancer cells was higher than K41-A, which prompted us to conduct mechanistic experiments. These studies showed that this uninvestigated compound acts as a multitarget compound by inhibiting autophagic flux, inducing reactive oxygen species formation, abolishing proteasome activity, and stimulating ER stress. Consequently, the optimized fermentation conditions of S. cacaoi led to the isolation of undescribed and known polyethers displaying promising activities.
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Affiliation(s)
- Emre Gezer
- Department of Biotechnology and Bioengineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | - Göklem Üner
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | - Melis Küçüksolak
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | - Mustafa Ünver Kurt
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | - Gamze Doğan
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | | | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey.
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Bedir E, Karakoyun Ç, Doğan G, Kuru G, Küçüksolak M, Yusufoğlu H. New Cardenolides from Biotransformation of Gitoxigenin by the Endophytic Fungus Alternaria eureka 1E1BL1: Characterization and Cytotoxic Activities. Molecules 2021; 26:molecules26103030. [PMID: 34069653 PMCID: PMC8161373 DOI: 10.3390/molecules26103030] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022] Open
Abstract
Microbial biotransformation is an important tool in drug discovery and for metabolism studies. To expand our bioactive natural product library via modification and to identify possible mammalian metabolites, a cytotoxic cardenolide (gitoxigenin) was biotransformed using the endophytic fungus Alternaria eureka 1E1BL1. Initially, oleandrin was isolated from the dried leaves of Nerium oleander L. and subjected to an acid-catalysed hydrolysis to obtain the substrate gitoxigenin (yield; ~25%). After 21 days of incubation, five new cardenolides 1, 3, 4, 6, and 8 and three previously- identified compounds 2, 5 and 7 were isolated using chromatographic methods. Structural elucidations were accomplished through 1D/2D NMR, HR-ESI-MS and FT-IR analysis. A. eureka catalyzed oxygenation, oxidation, epimerization and dimethyl acetal formation reactions on the substrate. Cytotoxicity of the metabolites were evaluated using MTT cell viability method, whereas doxorubicin and oleandrin were used as positive controls. Biotransformation products displayed less cytotoxicity than the substrate. The new metabolite 8 exhibited the highest activity with IC50 values of 8.25, 1.95 and 3.4 µM against A549, PANC-1 and MIA PaCa-2 cells, respectively, without causing toxicity on healthy cell lines (MRC-5 and HEK-293) up to concentration of 10 µM. Our results suggest that A. eureka is an effective biocatalyst for modifying cardenolide-type secondary metabolites.
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Affiliation(s)
- Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, İzmir Institute of Technology, 35430 Urla-İzmir, Turkey; (G.D.); (G.K.); (M.K.)
- Correspondence: (E.B.); (Ç.K.); Tel.: +90-232-750-7389 (E.B.); +90-232-311-2598 (Ç.K.)
| | - Çiğdem Karakoyun
- Department of Pharmacognosy, Faculty of Pharmacy, Ege University, 35100 Bornova-İzmir, Turkey
- Correspondence: (E.B.); (Ç.K.); Tel.: +90-232-750-7389 (E.B.); +90-232-311-2598 (Ç.K.)
| | - Gamze Doğan
- Department of Bioengineering, Faculty of Engineering, İzmir Institute of Technology, 35430 Urla-İzmir, Turkey; (G.D.); (G.K.); (M.K.)
| | - Gülten Kuru
- Department of Bioengineering, Faculty of Engineering, İzmir Institute of Technology, 35430 Urla-İzmir, Turkey; (G.D.); (G.K.); (M.K.)
| | - Melis Küçüksolak
- Department of Bioengineering, Faculty of Engineering, İzmir Institute of Technology, 35430 Urla-İzmir, Turkey; (G.D.); (G.K.); (M.K.)
| | - Hasan Yusufoğlu
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
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Aydoğan F, Anouar EH, Aygün M, Yusufoglu H, Karaalp C, Bedir E. An unprecedented diterpene with three new neoclerodanes from Teucrium sandrasicum O. Schwarz. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.129919] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Üner G, Tag Ö, Erzurumlu Y, Kirmizibayrak PB, Bedir E. Identification of a Noncanonical Necrotic Cell Death Triggered via Enhanced Proteolysis by a Novel Sapogenol Derivative. Chem Res Toxicol 2020; 33:2880-2891. [PMID: 33136369 DOI: 10.1021/acs.chemrestox.0c00339] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Small molecules which activate distinct cell death pathways have promising high potential for anticancer drug research. Especially, regulated necrosis draws attention as an alternative cell death mechanism to overcome the drug resistance. Here, we report that a new semisynthetic saponin analogue (AG-08) triggers necrotic cell death with unprecedented pathways. AG-08-mediated necrosis depends on enhanced global proteolysis involving calpains, cathepsins, and caspases. Moreover, AG-08 generates several alterations in lysosomal function and physiology including membrane permeabilization, redistribution toward the perinuclear area, and lastly excessive tubulation. As a consequence of lysosomal impairment, the autophagic process was abolished via AG-08 treatment. Collectively, in addition to its ability to induce necrotic cell death, which makes AG-08 a promising candidate to cope with drug resistance, its unique activity mechanisms including autophagy/lysosome impairment and enhancement of proteolysis leading a strong death capacity emphasizes its potential for anticancer drug research.
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Affiliation(s)
- Göklem Üner
- Department of Bioengineering, Izmir Institute of Technology, 35430 Urla-İzmir, Turkey
| | - Özgür Tag
- Bionorm Natural Products Production & Marketing Corporation, ITOB, 35477 Menderes-İzmir, Turkey
| | - Yalçın Erzurumlu
- Department of Biochemistry, Faculty of Pharmacy, Ege University, 35100 Bornova-İzmir, Turkey
| | | | - Erdal Bedir
- Department of Bioengineering, Izmir Institute of Technology, 35430 Urla-İzmir, Turkey
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Günbatan T, Gürbüz İ, Bedir E, Gençler Özkan AM, Özçınar Ö. Investigations on the anti-ulcerogenic activity of Sideritis caesarea H. Duman, Aytaç & Başer. J Ethnopharmacol 2020; 258:112920. [PMID: 32360801 DOI: 10.1016/j.jep.2020.112920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 04/18/2020] [Accepted: 04/26/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Aerial parts of Sideritis caesarea H. Duman, Aytaç & Başer are used for complaints such as stomach-aches, and intestinal spasms as traditional medicine in Kayseri, Turkey. AIM OF STUDY To investigate the anti-ulcerogenic activity by using bioassay guided fractionation technique (BAGF) and to identify the compound(s) that are responsible for anti-ulcerogenic activity through ethanol-induced anti-ulcerogenic activity model in vivo. MATERIALS AND METHODS Liquid-liquid partition and then different chromatographic techniques were utilized for the BAGF of the ethanol (80%) extract of the aerial parts of Sideritis caesarea. Ethanol-induced gastric ulcer method on rats was employed for the determination of the anti-ulcerogenic activity, and the ulcer index was also calculated for anti-ulcerogenic activity detection. RESULTS The ethanol (80%) extract of S. caesarea showed statistically potent anti-ulcerogenic activity (95.9% ulcer inhibition, p < 0.001). Among the liquid-liquid fractions, strongest anti-ulcerogenic activity was observed with the ethyl acetate fraction (91.4% inhibition, p < 0.001) and therefore BAGF studies were proceeded with the ethyl acetate fraction. Two anti-ulcerogenic flavonoids {4'-O-methylhypolaetin-7-O-[6‴-O-acetyl-β-D-allopyranosyl-(1→2)]-6″-O-acetyl-β-D-glucopyranoside and isoscutellarein-7-O-[6‴-O-acetyl-β-D-allopyranosyl-(1→2)]-6″-O-acetyl-β-D-glucopyranoside} were isolated from this fraction together with a sesquiterpene glycoside [(2E,6E)-2,6,10-trimethyl-2,6,11-dodecatriene-1,10-diol-1-O-β-D-glucopyranoside] and two additional flavonoids {4'-O-methylhypolaetin-7-O-[6‴-O-acetyl-β-D-allopyranosyl-(1→2)]-β-D-glucopyranoside and isoscutellarein-7-O-[6‴-O-acetyl-β-D-allopyranosyl-(1→2)]-β-D-glucopyranoside}. CONCLUSIONS Traditional use of S. caesarea in the treatment of stomach-aches was supported by this study and four flavonoids were isolated by using BAGF method and two of them were determined to have significant anti-ulcerogenic activity. Additionally, (2E,6E)-2,6,10-trimethyl-2,6,11-dodecatriene-1,10-diol-1-O-β-D-glucopyranoside was obtained from a Sideritis genus for the first time.
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Affiliation(s)
- Tuğba Günbatan
- Gazi University, Faculty of Pharmacy, Department of Pharmacognosy, Etiler, 06330, Ankara, Turkey.
| | - İlhan Gürbüz
- Gazi University, Faculty of Pharmacy, Department of Pharmacognosy, Etiler, 06330, Ankara, Turkey.
| | - Erdal Bedir
- Izmir Institute of Technology, Department of Bioengineering, Urla, 35430, Izmir, Turkey.
| | - Ayşe Mine Gençler Özkan
- Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Botany, Tandoğan, 06100, Ankara, Turkey.
| | - Özge Özçınar
- Ege University, Faculty of Pharmacy, Department of Pharmacognosy, Bornova, 35040, Izmir, Turkey.
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Aydogan F, Baykan S, Soliman GA, Yusufoglu H, Bedir E. Evaluation of the potential aphrodisiac activity of sesquiterpenoids from roots of Ferula huber-morathii Peşmen in male rats. J Ethnopharmacol 2020; 257:112868. [PMID: 32298751 DOI: 10.1016/j.jep.2020.112868] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/04/2020] [Accepted: 04/08/2020] [Indexed: 05/21/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Several species of Ferula L. genus have been used in traditional Turkish medicine as aphrodisiac to treat male sexual dysfunction. Especially, roots and oleo gum resin of F. elaeochytris Korovin, F. communis L., F. assa-foetida L. and F. gummosa Boiss. were claimed to be used for aphrodisiac activity, menstrual regulation and treatment of gastric pain in Anatolia. Ferula L. is represented by 23 taxa in Turkey, 13 of which are endemic species. F. huber-morathii Peşmen (FHM), an endemic plant, is popularly known as ''helizan, çağşır''. AIM OF THE STUDY This study aimed to isolate sesquiterpenoids from the roots of Ferula huber-morathii (FHM) and to confirm their aphrodisiac potential in male rats. MATERIAL AND METHODS In a preliminary experiment, the effects of aqueous (H2O) and chloroform (CHCl3) extracts of FHM were tested for their potential aphrodisiac activities in male rats. Then, sesquiterpene derivatives were isolated from the active chloroform extract of FHM roots (FHM-R) and characterized (TLC, 1D, 2D NMR, HR-MS and CD). Moreover, some of the isolates with adequate quantities were evaluated for their possible aphrodisiac effects on male rats. Single doses (10 mg/kg BW) of sildenafil citrate (SC, positive control), gummosin, mogoltavidin, deacetylkellerin, ferukrin acetate with kellerin, elaeochytrin-A and ferutinin were administered orally by gavages to male Wistar albino rats. Mount latency (ML), mount frequency (MF), intromission latency (IL), intromission frequency (IF), ejaculation latency (EL) and postejaculatory interval (PEI) were studied. In addition, copulatory efficiency (CE) and intercopulatory efficiency (ICE) were calculated. RESULTS The preliminary experiment revealed that the chloroform extract was the main source of the active compounds as it showed the higher aphrodisiac activity while the aqueous extract was found to be inactive. Eleven sesquiterpene derivatives, viz. gummosin, mogoltavidin, farnesiferol A, deacetylkellerin, ferukrin acetate, kellerin, teuclatriol, feruhermonin C, ferutinin, elaeochytrin A and teferidin, were isolated from the FHM-CHCl3 extract. Oral administration of deacetylkellerin, elaeochytrin-A and ferutinin significantly increased MF and IF. The ML and IL were significantly reduced, and ejaculation latencies were prolonged. Administration of these sesquiterpenoids also reduced the PEI. The present results revealed that ferutinin was the most effective aphrodisiac compound compared to other sesquiterpenoids. The results of 10 mg/kg of ferutinin are comparable to SC, the positive control. The results revealed that gummosin, mogoltavidin and ferukrin acetate with kellerin did not significantly alter the aphrodisiac parameters. CONCLUSIONS This study has established that the CHCl3 extract of FHM root contains sesquiterpene derivatives, especially coumarin ethers and benzoic esters. Findings of the present study demonstrate that the chloroform extract and some of the sesquiterpene derivatives significantly stimulates sexual behavior in male rats, thus suggesting that F. huber-morathii possesses an aphrodisiac activity.
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Affiliation(s)
- Fadime Aydogan
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Ege University, Bornova, İzmir, 35030, Turkey
| | - Sura Baykan
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Ege University, Bornova, İzmir, 35030, Turkey
| | - Gamal A Soliman
- Department of Pharmacology, College of Veterinary Medicine, Cairo University, Giza 12211, Egypt; Department of Pharmacology, College of Pharmacy, Prince Sattam Bin Abdulaziz University, 11942 Al-Kharj, Saudi Arabia
| | - Hasan Yusufoglu
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, 11942 Al-Kharj, Saudi Arabia
| | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430 Urla, İzmir, Turkey.
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Ekiz G, Yılmaz S, Yusufoglu H, Kırmızıbayrak PB, Bedir E. Microbial Transformation of Cycloastragenol and Astragenol by Endophytic Fungi Isolated from Astragalus Species. J Nat Prod 2019; 82:2979-2985. [PMID: 31713424 DOI: 10.1021/acs.jnatprod.9b00336] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Biotransformation of Astragalus sapogenins (cycloastragenol (1) and astragenol (2)) by Astragalus species originated endophytic fungi resulted in the production of five new metabolites (3, 7, 10, 12, 14) together with 10 known compounds. The structures of the new compounds were established by NMR spectroscopic and HRMS analysis. Oxygenation, oxidation, epoxidation, dehydrogenation, and ring cleavage reactions were observed on the cycloartane (9,19-cyclolanostane) nucleus. The ability of the compounds to increase telomerase activity in neonatal cells was also evaluated. After prescreening studies to define potent telomerase activators, four compounds were selected for subsequent bioassays. These were performed using very low doses ranging from 0.1 to 30 nM compared to the control cells treated with DMSO. The positive control cycloastragenol and 8 were found to be the most active compounds, with 5.2- (2 nM) and 5.1- (0.5 nM) fold activations versus DMSO, respectively. At the lowest dose of 0.1 nM, compounds 4 and 13 provided 3.5- and 3.8-fold activations, respectively, while cycloastragenol showed a limited activation (1.5-fold).
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Affiliation(s)
- Güner Ekiz
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy , Near East University , Nicosia , Mersin 10 , Turkey
- Department of Bioengineering, Graduate School of Natural and Applied Sciences , Ege University , 35100 Bornova-İzmir , Turkey
| | - Sinem Yılmaz
- Department of Bioengineering, Faculty of Engineering , University of Alanya Aladdin Keykubat , Antalya 07400 , Turkey
- Department of Biotechnology, Graduate School of Natural and Applied Sciences , Ege University , 35100 Bornova-İzmir , Turkey
| | - Hasan Yusufoglu
- Department of Pharmacognosy, College of Pharmacy , Prince Sattam Bin Abdulaziz University , 11942 Al-Kharj , Saudi Arabia
| | | | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering , Izmir Institute of Technology , 35430 Urla-Izmir , Turkey
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Khan N, Yılmaz S, Aksoy S, Uzel A, Tosun Ç, Kirmizibayrak PB, Bedir E. Polyethers isolated from the marine actinobacterium Streptomyces cacaoi inhibit autophagy and induce apoptosis in cancer cells. Chem Biol Interact 2019; 307:167-178. [DOI: 10.1016/j.cbi.2019.04.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 04/20/2019] [Accepted: 04/30/2019] [Indexed: 12/26/2022]
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Yakuboğulları N, Genç R, Çöven F, Nalbantsoy A, Bedir E. Development of adjuvant nanocarrier systems for seasonal influenza A (H3N2) vaccine based on Astragaloside VII and gum tragacanth (APS). Vaccine 2019; 37:3638-3645. [PMID: 31155418 DOI: 10.1016/j.vaccine.2019.05.038] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 04/25/2019] [Accepted: 05/13/2019] [Indexed: 01/21/2023]
Abstract
Adjuvants are chemical/biological substances that are used in vaccines to increase the immunogenicity of antigens. A few adjuvants have been developed for use in human vaccines because of their limitations including lack of efficacy, unacceptable local or systemic toxicity, the difficulty of manufacturing, poor stability, and high cost. For that reasons, novel adjuvants/adjuvant systems are under search. Astragaloside VII (AST-VII), isolated from Astragalus trojanus, exhibited significant cellular and humoral immune responses. The polysaccharides (APS) obtained from the roots of Astragalus species have been used in traditional Chinese medicine and possess strong immunomodulatory properties. In the present study, the immunomodulatory effects of a newly developed nanocarrier system (APNS: APS containing carrier) and its AST-VII containing formulation (ANS: AST-VII + APNS), on seasonal influenza A (H3N2) vaccine were investigated. Inactivated H3N2 alone or its combinations with test compounds/formulations were intramuscularly injected into Swiss albino mice. Four weeks after immunization, the immune responses were evaluated in terms of antibody and cytokine responses as well as splenocyte proliferation. APNS demonstrated Th2 mediated response by increasing IgG1 antibody titers, whereas ANS showed response towards Th1/Th2 balance and Th17 by producing of IFN-γ, IL-17A and IgG2a. Based on these results, we propose that APNS and ANS are good candidates to be utilized in seasonal influenza A vaccines as adjuvants/carrier systems.
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Affiliation(s)
- Nilgün Yakuboğulları
- Izmir Institute of Technology, Faculty of Engineering, Department of Bioengineering, 35433 Gülbahçe, Urla, Izmir, Turkey
| | - Rükan Genç
- Mersin University, Faculty of Engineering, Department of Chemical Engineering, 33343 Mersin, Turkey
| | - Fethiye Çöven
- Bornova Veterinary Control and Research Institute, 35100 Bornova, Izmir, Turkey
| | - Ayşe Nalbantsoy
- Ege University, Faculty of Engineering, Department of Bioengineering, 35100 Bornova, Izmir, Turkey.
| | - Erdal Bedir
- Izmir Institute of Technology, Faculty of Engineering, Department of Bioengineering, 35433 Gülbahçe, Urla, Izmir, Turkey.
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Kahraman C, Topcu G, Bedir E, Tatli II, Ekizoglu M, Akdemir ZS. Phytochemical screening and evaluation of the antimicrobial and antioxidant activities of Ferula caspica M. Bieb. extracts. Saudi Pharm J 2019; 27:525-531. [PMID: 31061621 PMCID: PMC6488826 DOI: 10.1016/j.jsps.2019.01.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 01/27/2019] [Indexed: 11/28/2022] Open
Abstract
Chloroform, ethyl acetate and methanol extracts from the aerial parts of Ferula caspica M. Bieb. were tested for their antioxidant capacities by CUPRAC, ABTS, FRAP, Folin-Ciocalteu and aluminum chloride methods and for antimicrobial activities by the broth microdilution method. Chloroform and ethyl acetate extracts showed the highest antioxidant capacity and antimicrobial activity. Three known sesquiterpene derivatives; 1-(2',4'-dihydroxyphenyl)-3,7,11-trimethyl-3-vinyl-6(E),10-dodecadien-1-one (1), 2,3-dihydro-7-hydroxy-2,3-dimethyl-2-[4',8'-dimethyl-3',7'-nonadienyl]-furo[3,2,c]coumarin (2), 2,3-dihydro-7-hydroxy-2,3-dimethyl-3-[4',8'-dimethyl-3',7'-nonadienyl]-furo[3,2,c]coumarin(3); phenylpropanoid; laserine/2-epilaserine (4/5) and steroid mixtures; stigmasterol and β-sitosterol (6/7) were isolated from chloroform extract; three known flavonoids; kaempferol-3-O-β-glucopyranoside (8), kaempferol-3-O-α-rhamnopyranoside (9), quercetin-3-O-β-glucopyranoside (10), and one benzoic acid derivative; 2,4-dihydroxybenzoic acid (11) were isolated from the ethyl acetate extract. The structures were elucidated by spectroscopic methods.
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Affiliation(s)
- Cigdem Kahraman
- Department of Pharmacognosy, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Gulacti Topcu
- Department of Pharmacognosy, Faculty of Pharmacy, Bezmialem Vakif University, İstanbul, Turkey
| | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, İzmir Institute of Technology, İzmir, Turkey
| | - I. Irem Tatli
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Melike Ekizoglu
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Zeliha S. Akdemir
- Department of Pharmacognosy, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
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Bayraktar M, Naziri E, Karabey F, Akgun IH, Bedir E, Röck-Okuyucu B, Gürel A. Enhancement of stevioside production by using biotechnological approach in in vitro culture of Stevia rebaudiana. International Journal of Secondary Metabolite 2018. [DOI: 10.21448/ijsm.496724] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Özçinar Ö, Tağ Ö, Yusufoglu H, Kivçak B, Bedir E. Biotransformation of ruscogenins by Cunninghamella blakesleeana NRRL 1369 and neoruscogenin by endophytic fungus Neosartorya hiratsukae. Phytochemistry 2018; 152:1-9. [PMID: 29689318 DOI: 10.1016/j.phytochem.2018.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 04/02/2018] [Accepted: 04/09/2018] [Indexed: 06/08/2023]
Abstract
Biotransformation of steroidal ruscogenins (neoruscogenin and ruscogenin) was carried out with Cunninghamella blakesleeana NRRL 1369 and endophytic fungus Neosartorya hiratsukae yielding mainly P450 monooxygenase products together with a glycosylated compound. Fermentation of ruscogenins (75:25, neoruscogenin-ruscogenin mixture) with C. blakesleeana yielded 8 previously undescribed hydroxylated compounds. Furthermore, microbial transformation of neoruscogenin by endophytic fungus N. hiratsukae afforded three previously undescribed neoruscogenin derivatives. While hydroxylation at C-7, C-12, C-14, C-21 with further oxidation at C-1 and C-7 were observed with C. blakesleeana, N. hiratsukae biotransformation provided C-7 and C-12 hydroxylated compounds along with C-12 oxidized and C-1(O) glycosylated derivatives. The structures of the metabolites were elucidated by 1-D (1H, 13C and DEPT135) and 2-D NMR (COSY, HMBC, HMQC, NOESY, ROESY) as well as HR-MS analyses.
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Affiliation(s)
- Özge Özçinar
- Department of Pharmacognosy, Faculty of Pharmacy, Ege University, 35100 Bornova, İzmir, Turkey
| | - Özgür Tağ
- Bionorm Natural Products Production & Marketing Corp., İTOB, 35477 Menderes, İzmir, Turkey
| | - Hasan Yusufoglu
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, 11942 Al-Kharj, Saudi Arabia
| | - Bijen Kivçak
- Department of Pharmacognosy, Faculty of Pharmacy, Ege University, 35100 Bornova, İzmir, Turkey
| | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430 Urla, Izmir, Turkey.
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Ekiz G, Duman S, Bedir E. Biotransformation of cyclocanthogenol by the endophytic fungus Alternaria eureka 1E1BL1. Phytochemistry 2018; 151:91-98. [PMID: 29677643 DOI: 10.1016/j.phytochem.2018.04.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 03/31/2018] [Accepted: 04/09/2018] [Indexed: 06/08/2023]
Abstract
The microbial transformation of cyclocanthogenol (CCG), Astragalus sp. originated sapogenin, by the endophytic fungus Alternaria eureka 1E1BL1 isolated from Astragalus angustifolius was investigated. Hydroxylation, oxidation, epoxidation, O-methylation, ring-expansion and methyl migration reactions were observed on the triterpenoid skeleton. As a result, eight metabolites were isolated and the structures of the previously undescribed compounds were established by 1-D, 2-D NMR and HR-MS analyses.
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Affiliation(s)
- Güner Ekiz
- Department of Pharmacognosy, Faculty of Pharmacy, Near East University, Nicosia, Mersin 10, Turkey
| | - Seda Duman
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430 Urla-Izmir, Turkey
| | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430 Urla-Izmir, Turkey.
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Debeleç-Bütüner B, Öztürk MB, Tağ Ö, Akgün İH, Yetik-Anacak G, Bedir E, Korkmaz KS. Cycloartane-type sapogenol derivatives inhibit NFκB activation as chemopreventive strategy for inflammation-induced prostate carcinogenesis. Steroids 2018; 135:9-20. [PMID: 29678446 DOI: 10.1016/j.steroids.2018.04.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 04/02/2018] [Accepted: 04/12/2018] [Indexed: 12/12/2022]
Abstract
Chronic inflammation is associated to 25% of cancer cases according to epidemiological data. Therefore, inhibition of inflammation-induced carcinogenesis can be an efficient therapeutic approach for cancer chemoprevention in drug development studies. It is also determined that anti-inflammatory drugs reduce cancer incidence. Cell culture-based in vitro screening methods are used as a fast and efficient method to investigate the biological activities of the biomolecules. In addition, saponins are molecules that are isolated from natural sources and are known to have potential for tumor inhibition. Studies on the preparation of analogues of cycloartane-type sapogenols (9,19-cyclolanostanes) have so far been limited. Therefore we have decided to direct our efforts toward the exploration of new anti-tumor agents prepared from cycloastragenol and its production artifact astragenol. The semi-synthetic derivatives were prepared mainly by oxidation, condensation, alkylation, acylation, and elimination reactions. After preliminary studies, five sapogenol analogues, two of which were new compounds (2 and 3), were selected and screened for their inhibitory activity on cell viability and NFκB signaling pathway activity in LNCaP prostate cancer cells. We found that the astragenol derivatives 1 and 2 as well as cycloastragenol derivatives 3, 4, and 5 exhibited strong inhibitory activity on NFκB signaling leading the repression of NFκB transcriptional activation and suppressed cell proliferation. The results suggested that these molecules might have significant potential for chemoprevention of prostate carcinogenesis induced by inflammatory NFκB signaling pathway.
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Affiliation(s)
- Bilge Debeleç-Bütüner
- Ege University, Faculty of Pharmacy, Department of Pharmaceutical Biotechnology, Izmir, Turkey.
| | - Mert Burak Öztürk
- Ege University, Faculty of Engineering, Department of Bioengineering, Cancer Biology Laboratory, Izmir, Turkey
| | - Özgür Tağ
- Ege University, Graduate School of Natural and Applied Sciences, Department of Chemistry, Izmir, Turkey
| | - İsmail Hakkı Akgün
- Ege University, Faculty of Engineering, Department of Bioengineering, Izmir, Turkey
| | - Günay Yetik-Anacak
- Ege University, Faculty of Pharmacy, Department of Pharmacology, Izmir, Turkey
| | - Erdal Bedir
- Ege University, Faculty of Engineering, Department of Bioengineering, Izmir, Turkey.
| | - Kemal Sami Korkmaz
- Ege University, Faculty of Engineering, Department of Bioengineering, Cancer Biology Laboratory, Izmir, Turkey
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18
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Abstract
Biotransformation of neoruscogenin (NR, 1, spirosta-5,25(27)-diene-1β,3β-diol), the major bioactive sapogenin of Ruscus preparations, was carried out with the endophytic fungus Alternaria eureka. Fourteen new biotransformation products (2-15) were isolated, and their structures were elucidated by NMR and HRESIMS data analyses. A. eureka affected mainly oxygenation, oxidation, and epoxidation reactions on the B and C rings of the sapogenin to afford compounds 8-15. In addition to these, cleavage of the spiroketal system as in compounds 2-7 and subsequent transformations provided unusual metabolites. This is the first study reporting conversion of the spirostanol skeleton to cholestane-type metabolites 2-5. Additionally, the cleavage of the C-22/C-26 oxygen bridge yielding a furostanol-type steroidal framework and subsequent formation of the epoxy bridge between C-18 and C-22 in 7 was encountered for the first time in steroid chemistry.
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Affiliation(s)
- Özge Özçınar
- Department of Pharmacognosy, Faculty of Pharmacy , Ege University , 35100 Bornova - İzmir , Turkey
| | - Hasan Yusufoglu
- Department of Pharmacognosy, College of Pharmacy , Prince Sattam Bin Abdulaziz University , 11942 Al-Kharj , Saudi Arabia
| | - Bijen Kivçak
- Department of Pharmacognosy, Faculty of Pharmacy , Ege University , 35100 Bornova - İzmir , Turkey
| | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering , Izmir Institute of Technology , 35430 Urla - Izmir , Turkey
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Özek G, Bedir E, Tabanca N, Ali A, Khan IA, Duran A, Başer KH, Özek T. Isolation of eudesmane type sesquiterpene ketone from Prangos heyniae H.Duman & M.F.Watson essential oil and mosquitocidal activity of the essential oils. OPEN CHEM 2018. [DOI: 10.1515/chem-2018-0051] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
AbstractIn the present work, an endemic species Prangos heyniae collected in four locations from Turkey was subjected to hydrodistillation in Clevenger type apparatus to obtain the essential oils (EO1-4). The gas-chromatography/mass spectrometry (GC/MS) and gas-chromatography-flame ionization detector (GC/FID) analyses showed that the EOs were rich in sesquiterpenes, germacrene D (10.3-12.1%), β-bisabolene (14.4%), kessane (26.9%), germacrene B (8.2%), elemol (3.4-46.9%), β-bisabolenal (1.4-70.7%), β-bisabolenol (8.4%) and an eudesmane type sesquiterpene (1) (16.1%) with [M+218]. This unidentified compound (1) was isolated in a rapid one-step manner with >95.0% purity using Preparative Capillary Gas Chromatography (PCGC) with an HP Innowax column connected to a Preparative Fraction Collector (PFC) system. Structure determination was accomplished from 1D- and 2D-NMR spectroscopic data which determined a new eudesmane type sesquiterpene, 3,7(11)-eudesmadien-2-one (1). Using a biting deterrent bioassay, the mean proportion not biting (PNB) values of the P. heyniae EO1-4 were 0.88 for EO1 and 0.80 for EO2 which were similar to the positive control DEET (N,N-diethyl-3-methylbenzamide). The EO3 and EO4 had lower PNB values of 0.64 and 0.44, respectively. P. heyniae EO1-4 showed good larvicidal activity at 125 and 62.5 ppm whereas EO1-3 were slightly less effective at the dose of 31.25 ppm and EO4 was not active at 31.25 ppm against 1st instar Aedes aegypti.
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Affiliation(s)
- Gülmira Özek
- Department of Pharmacognosy, Faculty of Pharmacy, Anadolu University, Eskişehir, 26470, Turkey
| | - Erdal Bedir
- Department of Bioengineering, Izmir Institute of Technology, Urla, 35430, Izmir, Turkey
| | - Nurhayat Tabanca
- USDA-ARS, Subtropical Horticulture Research Station, 13601 Old Cutler Rd., Miami, FL 33158, USA
- National Center for Natural Products Research, The University of Mississippi, University, MS 38677, Miami, USA
| | - Abbas Ali
- National Center for Natural Products Research, The University of Mississippi, University, MS 38677, Miami, USA
| | - Ikhlas A. Khan
- National Center for Natural Products Research, The University of Mississippi, University, MS 38677, Miami, USA
| | - Ahmet Duran
- Sancak District, Veysel Karani Street, Ataşehir Homes, Blok K/38, Selçuklu / konya, Turkey
| | - Kemal H.C. Başer
- Department of Pharmacognosy, Faculty of Pharmacy, Near East University, Lefkoşa (Nicosia) TRNC, Mersin 10, Mersin, Turkey
| | - Temel Özek
- Department of Pharmacognosy, Faculty of Pharmacy, Anadolu University, Eskişehir, 26470, Turkey
- Anadolu University, Medicinal Plant Drug and Scientific Research Center (AUBIBAM), 26470-Eskişehir, Turkey
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Demir S, Karaalp C, Bedir E. Specialized metabolites from the aerial parts of Centaurea polyclada DC. Phytochemistry 2017; 143:12-18. [PMID: 28738242 DOI: 10.1016/j.phytochem.2017.07.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/20/2017] [Accepted: 07/12/2017] [Indexed: 06/07/2023]
Abstract
The genus Centaurea L. (Asteraceae) is represented by 200 taxa in the flora of Turkey and several Centaurea species are used as herbal remedies against different conditions. Previous phytochemical investigations on this genus generally revealed the isolation of sesquiterpene lactones and flavonoid derivatives. In our continuous search on Centaurea genus, a phytochemical study was performed on Centaurea polyclada DC., an endemic of West Anatolia. Previously undescribed two sesquiterpene-amino acid conjugates, an elemane and an eudesmane derivative were isolated from the aerial parts of Centaurea polyclada, together with eight known compounds; two elemane derivatives, three flavonoids, a lignan, a phenolic glucoside and a phenylpropanoid glucoside. Structural elucidation of the compounds was based on spectroscopic evidence, including 1D and 2D NMR and high-resolution mass spectrometry, chemical degradation results and reference data comparison. Sesquiterpene-amino acid conjugates are representatives of an unusual group of sesquiterpenes, and elemane-amino acid conjugates are herein reported for the first time in nature.
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Affiliation(s)
- Serdar Demir
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Ege University, 35100, Bornova, Izmir, Turkey
| | - Canan Karaalp
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Ege University, 35100, Bornova, Izmir, Turkey
| | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey.
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Bayazeid O, Bedir E, Yalçın F. Structure virtual screening of two cytotoxic compounds isolated from Papaver lacerum. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- O Bayazeid
- Hacettepe University, Faculty of Pharmacy, Dept. of Pharmacognosy, ANKARA, Turkey
| | - E Bedir
- Izmir Institute of Technology, Faculty of Engineering, Dept. of Bioengineering, Izmir, Turkey
| | - F Yalçın
- Hacettepe University, Faculty of Pharmacy, Dept. of Pharmacognosy, ANKARA, Turkey
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Kahraman C, Topcu G, Bedir E, Akdemir ZS. A New Sesquiterpene Isolated From The Aerial Parts of Ferula caspica Bieb. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- C Kahraman
- Department of Pharmacognosy, Faculty of Pharmacy, Hacettepe University,TR-06100, Ankara, Turkey
| | - G Topcu
- Department of Pharmacognosy, Faculty of Pharmacy, Bezmialem Vakif University, TR- 34093, Istanbul, Turkey
| | - E Bedir
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, TR- 35430, Izmir, Turkey
| | - ZS Akdemir
- Department of Pharmacognosy, Faculty of Pharmacy, Hacettepe University,TR-06100, Ankara, Turkey
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Aslanipour B, Gülcemal D, Nalbantsoy A, Yusufoglu H, Bedir E. Secondary metabolites from Astragalus karjaginii BORISS and the evaluation of their effects on cytokine release and hemolysis. Fitoterapia 2017; 122:26-33. [PMID: 28827003 DOI: 10.1016/j.fitote.2017.08.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 08/16/2017] [Accepted: 08/17/2017] [Indexed: 12/18/2022]
Abstract
A new cycloartane sapogenol and a new cycloartane xyloside were isolated from Astragalus karjaginii BORISS along with thirteen known compounds. The structures of the new compounds were established as 3-oxo-6α,16β,24(S),25-tetrahydroxycycloartane (1) and 6-O-β-d-xylopyranosyl-3β,6α,16β,24(S),25-pentahydroxycycloartane (2) by 1D- and 2D-NMR experiments as well as ESIMS and HRMS analyses. The presence of the keto function at position 3 was reported for the first time for cyclocanthogenol sapogenin of Astragalus genus. In vitro immunomodulatory effects of the new compounds (1 and 2) along with the n-BuOH and MeOH extracts of A. karjaginii at two different doses (3 and 6μg) were tested on human whole blood for in vitro cytokine release (IL-2, IL-17A and IFN-γ) and hemolytic activities. The results confirmed that compound 2, a monodesmosidic saponin, had the strongest effect on the induction of both IL-2 (6μg, 6345.41±0.12pg/mL (×5), P<0.001) and a slight effect upon IL-17A (3μg, 5217.85±0.72pg/mL, P<0.05) cytokines compared to the other test compounds and positive controls (AST VII: Astragaloside VII; and QS-21: Quillaja saponin 21). All tested extracts and molecules also induced release of IFN-γ remarkably ranging between 5031.95±0.05pg/mL, P<0.001 for MeOH extract (6μg) and 5877.08±0.06pg/mL, P<0.001 for compound 1 (6μg) compared to QS-21 (6μg, 5924.87±0.1pg/mL, P<0.001). Administration of AST VII and other test compounds did not cause any hemolytic activity, whereas QS-21 resulted a noteworthy hemolysis.
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Affiliation(s)
- Behnaz Aslanipour
- Department of Bioengineering, Faculty of Engineering, Ege University, Bornova, 35100 İzmir, Turkey
| | - Derya Gülcemal
- Department of Chemistry, Faculty of Science, Ege University, Bornova, 35100 Izmir, Turkey
| | - Ayşe Nalbantsoy
- Department of Bioengineering, Faculty of Engineering, Ege University, Bornova, 35100 İzmir, Turkey
| | - Hasan Yusufoglu
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, 11942 Al-Kharj, Saudi Arabia
| | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, Urla, 35430 Izmir, Turkey.
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Horo I, Kocabaş F, Alankuş-Çalιşkan Ö, Özgökçe F, Khan IA, Bedir E. Secondary Metabolites from Astragalus lycius and Their Cytotoxic Activities. Nat Prod Commun 2016; 11:1847-1850. [PMID: 30508348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023] Open
Abstract
Eight known secondary metabolites were isolated from the methanolic extract of the whole plant of Astragalus lycius Boiss. They were identified as 5,5'-dihydoxy-3'-methoxy-isoflavone-7-0-β-D-glucoside (1), genistin (2), sissotrin (3), 5,4'-dimethoxy-isoflavone-7-0-β-D-glucopyranoside (4), (7S,8R)-5-methoxydehydrodiconiferyl alcohol-4-0-β-D-glucopyranoside (5), 4-0-lariciresinol-glucoside (6), 2-phenylethyl-β-D-glucopyranoside (7) and β-sitosterol-3-O-β-D-glucopyranoside (8) by spectroscopic methods including (1)H- and (13)C-NMR and HR-MS experiments, and by comparison with literature values. Compounds 1-7 are reported for the first time from Astragalus taxa. All of the compounds were tested for their cytotoxic activities against a number of cancer cell lines. Among them, only 6 exhibited significant activity against human colon carcinoma (HT-29) at 2.69 μM concentration.
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Horo I, Kocabaş F, Alankuş-Çalışkan Ö, Özgökçe F, Khan IA, Bedir E. Secondary Metabolites from Astragalus lycius and Their Cytotoxic Activities. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601101218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Eight known secondary metabolites were isolated from the methanolic extract of the whole plant of Astragalus lycius Boiss. They were identified as 5,5′-dihydroxy-3′-methoxy-isoflavone-7- O-β-D-glucoside (1), genistin (2), sissotrin (3), 5,4′-dimethoxy-isoflavone-7- O-β-D-glucopyranoside (4), (7 S,8 R)-5-methoxydehydrodiconiferyl alcohol-4- O-β-D-glucopyranoside (5), 4- O-lariciresinol-glucoside (6), 2-phenylethyl-β-D-glucopyranoside (7) and β-sitosterol-3- O-β-D-glucopyranoside (8) by spectroscopic methods including 1H- and 13C-NMR and HR-MS experiments, and by comparison with literature values. Compounds 1–7 are reported for the first time from Astragalus taxa. All of the compounds were tested for their cytotoxic activities against a number of cancer cell lines. Among them, only 6 exhibited significant activity against human colon carcinoma (HT-29) at 2.69 μM concentration.
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Affiliation(s)
- Ibrahim Horo
- Ege University, Faculty of Science, Department of Chemistry, 35100 Bornova, Izmir, Turkey
| | - Fatma Kocabaş
- Izmir Institute of Technology, Faculty of Engineering, Department of Bioengineering, 35430 Urla, Izmir, Turkey
| | - Özgen Alankuş-Çalışkan
- Ege University, Faculty of Science, Department of Chemistry, 35100 Bornova, Izmir, Turkey
| | - Fevzi Özgökçe
- Yüzüncü Yıl University, Faculty of Science & Art, Department of Biology, 65080 Van, Turkey
| | - Ihlas A. Khan
- The University of Mississippi, School of Pharmacy, National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, University, MS 38677 USA
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Köroğlu A, Baldemir A, Özek G, Bedir E, Tabanca N, Ali A, Khan IA, Hüsnü K, Başer C, Özek T. 11-Hydroxy-2,4-cycloeudesmane from the Leaf Oil of Juglans regia and Evaluation of its Larvicidal Activity. Nat Prod Commun 2016; 11:1421-1424. [PMID: 30549590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023] Open
Abstract
Leaves of Juglans regia L. collected from two different locations [Adana (A) and Ankara (B)] from Turkey were subjected to hydrodistillation in a Clevenger type apparatus to yield the essential oils (EOs). GC/MS and GC-FID analyses revealed that the A EO was rich in thymol (23.1%), while caryophyllene oxide (33.8%) was found as the main constituent of B EO. Both contained P-eudesmol (1.4% - 9.5 %), (E)-geranyl acetone (3.7% - 5.8%) and the eudesmane type constituent juglaterpene A (3.1% - 11.0%). Using a HP Innowax preparative capillary column connected to a preparative fraction collector, an unknown constituent, juglaterpene A (1, 1 l-hydroxy-2,4-cycloeudesmane), was isolated in a rapid one-step manner with > 94.0% purity. Structure determination was accomplished from ID- and 2D-NMR spectroscopic data. Oil B demonstrated significant larvicidal activity against 1st instar Aedes aegypti L.
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Köroğlu A, Baldemir A, Özek G, Bedir E, Tabanca N, Ali A, Khan IA, Başer KHC, Özek T. 11-Hydroxy-2,4-cycloeudesmane from the Leaf Oil of Juglans regia and Evaluation of its Larvicidal Activity. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601101002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Leaves of Juglans regia L. collected from two different locations [Adana (A) and Ankara (B)] from Turkey were subjected to hydrodistillation in a Clevenger type apparatus to yield the essential oils (EOs). GC/MS and GC-FID analyses revealed that the A EO was rich in thymol (23.1%), while caryophyllene oxide (33.8%) was found as the main constituent of B EO. Both contained β-eudesmol (1.4% - 9.5 %), ( E)-geranyl acetone (3.7% - 5.8%) and the eudesmane type constituent juglaterpene A (3.1% - 11.0%). Using a HP Innowax preparative capillary column connected to a preparative fraction collector, an unknown constituent, juglaterpene A (1, 11-hydroxy-2,4-cycloeudesmane), was isolated in a rapid one-step manner with > 94.0% purity. Structure determination was accomplished from 1D- and 2D-NMR spectroscopic data. Oil B demonstrated significant larvicidal activity against 1st instar Aedes aegypti L.
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Affiliation(s)
- Ayşegül Köroğlu
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Ankara University, 06100, Tandogan, Ankara, Turkey
| | - Ayşe Baldemir
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Erciyes University, 38039 Melikgazi/Kayseri, Turkey
| | - Gülmira Özek
- Department of Pharmacognosy, Faculty of Pharmacy, Anadolu University, 26470, Eskisehir, Turkey
| | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, Ege University, Bornova, Izmir 35100, Turkey
| | - Nurhayat Tabanca
- National Center for Natural Products Research, The University of Mississippi, University, MS 38677, USA
- Department of Entomology and Nematology, Emerging Pathogens Institute, University of Florida, Gainesville, FL 32610, USA
- USDA-ARS, Center for Medical, Agricultural, and Veterinary Entomology, Gainesville, FL, 32608, USA
| | - Abbas Ali
- National Center for Natural Products Research, The University of Mississippi, University, MS 38677, USA
| | - Ikhlas A. Khan
- National Center for Natural Products Research, The University of Mississippi, University, MS 38677, USA
| | - Kemal Hüsnü Can Başer
- Department of Pharmacognosy, Faculty of Pharmacy, Near East University, Lefkoşa (Nicosia) N. Cyprus
| | - Temel Özek
- Department of Pharmacognosy, Faculty of Pharmacy, Anadolu University, 26470, Eskisehir, Turkey
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Vann KR, Ekiz G, Zencir S, Bedir E, Topcu Z, Osheroff N. Effects of Secondary Metabolites from the Fungus Septofusidium berolinense on DNA Cleavage Mediated by Human Topoisomerase IIα. Chem Res Toxicol 2016; 29:415-20. [PMID: 26894873 DOI: 10.1021/acs.chemrestox.6b00009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Two metabolites from the ascomycete fungus Septofusidium berolinense were recently identified as having antineoplastic activity [Ekiz et al. (2015) J. Antibiot. , DOI: 10.1038/ja.2015.84]. However, the basis for this activity is not known. One of the compounds [3,6-dihydroxy-2-propylbenzaldehyde (GE-1)] is a hydroquinone, and the other [2-hydroxymethyl-3-propylcyclohexa-2,5-diene-1,4-dione (GE-2)] is a quinone. Because some hydroquinones and quinones act as topoisomerase II poisons, the effects of GE-1 and GE-2 on DNA cleavage mediated by human topoisomerase IIα were assessed. GE-2 enhanced DNA cleavage ∼4-fold and induced scission with a site specificity similar to that of the anticancer drug etoposide. Similar to other quinone-based topoisomerase II poisons, GE-2 displayed several hallmark characteristics of covalent topoisomerase II poisons, including (1) the inability to poison a topoisomerase IIα construct that lacks the N-terminal domain, (2) the inhibition of DNA cleavage when the compound was incubated with the enzyme prior to the addition of plasmid, and (3) the loss of poisoning activity in the presence of a reducing agent. In contrast to GE-2, GE-1 did not enhance DNA cleavage mediated by topoisomerase IIα except at very high concentrations. However, the activity and potency of the metabolite were dramatically enhanced under oxidizing conditions. These results suggest that topoisomerase IIα may play a role in mediating the cytotoxic effects of these fungal metabolites.
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Affiliation(s)
| | | | - Sevil Zencir
- Department of Medical Biology, Faculty of Medicine, Pamukkale University , 20070 Denizli, Turkey
| | | | | | - Neil Osheroff
- VA Tennessee Valley Healthcare System , Nashville, Tennessee 37212, United States
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S. Yusufog H, A. Soliman G, Abdel-Rahm RF, Abdel-Kade MS, A. Genaie M, Bedir E, Erel SB, Ozturk B. Antioxidant and Antihyperglycemic Effects of Ferula drudeana and Ferula huber-morathii in Experimental Diabetic Rats. INT J PHARMACOL 2015. [DOI: 10.3923/ijp.2015.738.748] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ekiz G, Hameş EE, Nalbantsoy A, Bedir E. Two rare quinone-type metabolites from the fungus Septofusidium berolinense and their biological activities. J Antibiot (Tokyo) 2015; 69:111-3. [DOI: 10.1038/ja.2015.84] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 06/19/2015] [Accepted: 06/27/2015] [Indexed: 11/09/2022]
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Yusufoglu HS, Soliman GA, Abdel-Rahm RF, Abdel-Kade MS, Ganaie MA, Bedir E, Baykan S, Ozturk B. Antihyperglycemic and Antihyperlipidemic Effects of Ferula duranii in Experimental Type 2 Diabetic Rats. INT J PHARMACOL 2015. [DOI: 10.3923/ijp.2015.532.541] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bedir E, Kula C, Öner Ö, Altaş M, Tağ Ö, Öngen G. Microbial transformation of Astragalus sapogenins using Cunninghamella blakesleeana NRRL 1369 and Glomerella fusarioides ATCC 9552. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcatb.2015.01.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yossof MMA, Selim A, Abdelhady G, Bedir E. P513Study of toll-like receptors in some egyptian patients with ischemic heart diseases:. Cardiovasc Res 2014. [DOI: 10.1093/cvr/cvu091.185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Alankuş-Çalışkan Ö, Emirdağ S, Bedir E, Avunduk S, Anıl H. Triterpene Saponins from Knautia integrifolia var. bidens. Zeitschrift für Naturforschung B 2014. [DOI: 10.1515/znb-2004-0712] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Two new triterpene saponins (1 and 2), named bidenosides A and B, were isolated from the roots of Knautia integrifolia var. bidens. The structures were identified as 3-O-α-L-rhamnopyranosyl-28- O-[β -D-allopyranosyl-(1→6)-β -D-glucopyranosyl]-pomolic acid, and 3-O-α-L-rhamnopyranosyl- 28-O-[β -D-allopyranosyl-(1→6)-β -D-glucopyranosyl]-oleanolic acid on the basis of spectroscopic evidence.
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Affiliation(s)
- Özgen Alankuş-Çalışkan
- Department of Chemistry, Faculty of Science, Ege University, Bornova, Izmir, 35100 Turkey
| | - Safiye Emirdağ
- Department of Chemistry, Faculty of Science, Ege University, Bornova, Izmir, 35100 Turkey
| | - Erdal Bedir
- Department of Chemistry, Faculty of Science, Ege University, Bornova, Izmir, 35100 Turkey
| | - Sibel Avunduk
- Department of Chemistry, Faculty of Science, Ege University, Bornova, Izmir, 35100 Turkey
| | - Hüseyin Anıl
- Department of Chemistry, Faculty of Science, Ege University, Bornova, Izmir, 35100 Turkey
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Yalçın FN, Ersöz T, Bedir E, Dönmez AA, Stavri M, Zloh M, Gibbons S, Çaliş İ. Amanicadol, a Pimarane-type Diterpene from Phlomis amanica Vierch. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-2006-1118] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Fractionation of the methanol extract of Phlomis amanica resulted in the isolation of a new pimarane type diterpene, amanicadol (1), together with the known glycosides lamiide, verbascoside (= acteoside), syringaresinol-4-O-β -glucoside, liriodendrin, syringin, and a caffeic acid ester, chlorogenic acid. The structure of the new compound was established on the basis of extensive 1D and 2D NMR spectroscopic data interpretation. Molecular modeling studies on 1 were conducted and showed that it exhibited low conformational flexibility. Additionally, NMR chemical shifts were calculated for 1 in vacuo, and calculated values were in very close agreement with those found experimentally.
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Affiliation(s)
- Funda N. Yalçın
- Hacettepe University, Faculty of Pharmacy, Department of Pharmacognosy, 06100, Sıhhiye, Ankara, Turkey
| | - Tayfun Ersöz
- Hacettepe University, Faculty of Pharmacy, Department of Pharmacognosy, 06100, Sıhhiye, Ankara, Turkey
| | - Erdal Bedir
- Ege University, Faculty of Engineering, Department of Bioengineering, 35100, Bornova, Izmir, Turkey
| | - Ali A. Dönmez
- Hacettepe University, Faculty of Science, Department of Biology, 06532, Beytepe, Ankara, Turkey
| | - Michael Stavri
- Centre for Pharmacognosy and Phytotherapy, The School of Pharmacy, University of London
| | - Mire Zloh
- Department of Pharmaceutical and Biological Chemistry, The School of Pharmacy, University of London, 29 – 39 Brunswick Square, London WC1N 1AX, United Kingdom
| | - Simon Gibbons
- Centre for Pharmacognosy and Phytotherapy, The School of Pharmacy, University of London, 29 – 39 Brunswick Square, London WC1N 1AX, United Kingdom
| | - İhsan Çaliş
- Hacettepe University, Faculty of Pharmacy, Department of Pharmacognosy, 06100, Sıhhiye, Ankara, Turkey
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Abstract
From the aerial parts of the plant Verbascum salviifolium, two new iridoid glucosides, 6-O- β-D-glucopyranosylcatalpol (1) and 6-O-(6″-O-trans-p-hydroxycinnamoyl)- β -D-glucopyranosylaucubin (2) along with five known iridoid glycosides, 6-O- β -D-glucopyranosylaucubin (3), 6-O-α-L-rhamnopyranosylcatalpol (4), verbaspinoside [= 6-O-(2″-O-trans-cinnamoyl)-α-L-rhamnopyranosylcatalpol] (5), pulverulentoside I [= 6-O-(2″-O-trans-p-methoxycinnamoyl-3″ -O-acetyl)-α-L-rhamnopyranosylcatalpol] (6), and buddlejoside A8 [= 6-O-(4″-O-trans-3,4-dimethoxycinnamoyl)- α-L-rhamnopyranosylcatalpol] (7) were isolated. The structures of the new compounds were established on the basis of spectroscopic evidence.
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Affiliation(s)
- Zeliha S Akdemir
- Hacettepe University, Faculty of Pharmacy, Dept. of Pharmacognosy, Sihhiye, Ankara 06100, Turkey
| | - I. Irem Tatli
- Hacettepe University, Faculty of Pharmacy, Dept. of Pharmacognosy, Sihhiye, Ankara 06100, Turkey
| | - Erdal Bedir
- National Center For Natural Products Research Institute of Pharmaceutical Sciences, University of Mississippi, University, Mississippi 38677, USA / Present Address: Ege University, Faculty of Engineering, Dept. of Bioengineering, Bornova, Izmir 35100, Turkey
| | - Ikhlas A. Khan
- National Center For Natural Products Research Institute of Pharmaceutical Sciences, University of Mississippi, University, Mississippi 38677, USA
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Djimtombaye BJ, Alankuş-Çalışkan Ö, Gülcemal D, Khan IA, Anıl H, Bedir E. Unusual secondary metabolites from Astragalus halicacabus LAM. Chem Biodivers 2014; 10:1328-34. [PMID: 23847078 DOI: 10.1002/cbdv.201200436] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Indexed: 11/12/2022]
Abstract
From the whole plant of Astragalus halicacabus (Sect. Halicacabus), a new cycloartane-type glycoside, (20R,24S)-3-O-[α-L-arabinopyranosyl-(1→2)-β-D-xylopyranosyl]-20,24-epoxy-16-O-β-D-glucopyranosyl-3β,6α,16β,25-tetrahydroxycycloartane, and a new glycoside, 3-O-[β-D-apiofuranosyl-(1→2)-β-D-glucopyranosyl]maltol were isolated together with seven known cycloartane-type glycosides, i.e., cyclocanthoside D, askendosides D, F, and G, cyclosieversioside G, cyclostipuloside A, elongatoside, and a known maltol glucoside, 3-O-β-D-glucopyranosylmaltol. The structures were elucidated by means of high-resolution mass spectrometry, and extensive 1D- and 2D-NMR spectroscopic analysis. This is the first phytochemical work on A. halicacabus, and a maltol glycoside was encountered for the first time in the Leguminosae family.
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Öner Ö, Ekiz G, Hameş EE, Demir V, Gübe Ö, Özkaya FC, Yokeş MB, Uzel A, Bedir E. Cultivable Sponge-Associated Actinobacteria from Coastal Area of Eastern Mediterranean Sea. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/aim.2014.46037] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kuban M, Öngen G, Khan IA, Bedir E. Microbial transformation of cycloastragenol. Phytochemistry 2013; 88:99-104. [PMID: 23357596 DOI: 10.1016/j.phytochem.2012.12.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 12/11/2012] [Accepted: 12/17/2012] [Indexed: 06/01/2023]
Abstract
The microbial transformation of cycloastragenol by the fungi Cunninghamella blakesleeana NRRL 1369 and Glomerella fusarioides ATCC 9552, and the bacterium Mycobacterium sp. NRRL 3805 were investigated. Both fungi mainly provided hydroxylated metabolites together with products formed by cyclization, dehydrogenation and Baeyer-Villiger oxidation resulting in a ring cleavage. The bacteria yielded only a single oxidation product, namely, 3-oxo-cycloastragenol. Structures of the metabolites were elucidated by 1-D ((1)H,(13)C), 2-D NMR (COSY, HMBC, HMQC) and HRMS analyses.
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Affiliation(s)
- Melis Kuban
- Ege University, Faculty of Engineering, Department of Bioengineering, 35100 Bornova, İzmir, Turkey
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Gülcemal D, Masullo M, Napolitano A, Karayıldırım T, Bedir E, Alankuş-Çalışkan O, Piacente S. Oleanane glycosides from Astragalus tauricolus: isolation and structural elucidation based on a preliminary liquid chromatography-electrospray ionization tandem mass spectrometry profiling. Phytochemistry 2013; 86:184-194. [PMID: 23107778 DOI: 10.1016/j.phytochem.2012.10.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 09/28/2012] [Accepted: 10/01/2012] [Indexed: 06/01/2023]
Abstract
As a part of our ongoing research for bioactive compounds from Turkish Astragalus species, the investigation of Astragalus tauricolus has been carried out. An approach based on HPLC-ESIMS(n) experiments has been used to profile the triterpene glycosides occurring in the butanol extract of the whole plant. On the basis of the results of the online screening by HPLC-ESIMS(n), 22 oleanane-type triterpene glycosides, including ten compounds never reported before, were isolated, and their structures were established by the extensive use of 1D and 2D-NMR experiments along with ESIMS and HRMS analysis. Noteworthy, cycloartane-type triterpene glycosides, the main constituents of Astragalus spp., were not found. This peculiar feature characterizes a very limited group of Astragalus spp. The antiproliferative activity of the isolated compounds 1-12, 15, 17-19 was evaluated against a small panel of cancer cell lines. Only compound 11 showed an IC(50) of 22 μM against human leukemia cell line (U937). The other tested compounds, in a range of concentrations between 1 and 50 μM, did not cause any significant reduction of the cell number.
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Affiliation(s)
- Derya Gülcemal
- Chemistry Department, Faculty of Science, Ege University, 35100 Bornova, Izmir, Turkey
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Horo I, Bedir E, Masullo M, Piacente S, Ozgökçe F, Alankuş-Çalışkan O. Saponins from Astragalus hareftae (NAB.) SIRJ. Phytochemistry 2012; 84:147-153. [PMID: 22925830 DOI: 10.1016/j.phytochem.2012.07.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Revised: 07/19/2012] [Accepted: 07/23/2012] [Indexed: 06/01/2023]
Abstract
Four cycloartane- (hareftosides A-D) and oleanane-type triterpenoids (hareftoside E) were isolated from Astragalus hareftae along with fifteen known compounds. Structures of the compounds were established as 3,6-di-O-β-D-xylopyranosyl-3β,6α,16β,24(S),25-pentahydroxycycloartane, 3,6,24-tri-O-β-D-xylopyranosyl-3β,6α,16β,24(S),25-pentahydroxycycloartane, 3-O-β-D-xylopyranosyl-3β,6α,16β,25-tetrahydroxy-20(R),25(S)-epoxycycloartane, 16-O-β-D-glucopyranosyl-3β,6α,16β,25-tetrahydroxy-20(R),24(S)-epoxycycloartane, 3-O-[β-D-xylopyranosyl-(1→2)-O-β-D-glucopyranosyl-(1→2)-O-β-D-glucuronopyranosyl]-soyasapogenol B by the extensive use of 1D- and 2D-NMR experiments along with ESI-MS and HR-MS analyses.
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Affiliation(s)
- Ibrahim Horo
- Department of Chemistry, Faculty of Science, Ege University, 35100 Bornova, İzmir, Turkey
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Tağ Ö, Çağır A, Khan IA, Bedir E. Cleavage of ring A and formation of an unusual nor-triterpene skeleton via the Baeyer–Villiger reaction. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.08.068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Cetinel Aksoy S, Uzel A, Hames-Kocabas EE, Khan IA, Bedir E. Purification and identification of secondary metabolites from marine derived Streptomyces rochei 6CM016 and their antimicrobial activities. N Biotechnol 2012. [DOI: 10.1016/j.nbt.2012.08.194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Öner Ö, Ekiz G, Hameş-Kocabaş EE, Demir V, Gübe Ö, Özkaya FC, Yokeş MB, Uzel A, Bedir E. Cultivable sponge-associated actinobacteria: Phylogenetic diversity and antimicrobial activities. N Biotechnol 2012. [DOI: 10.1016/j.nbt.2012.08.646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Özcan K, Çetinel Aksoy S, Kalkan O, Uzel A, Hames-Kocabas EE, Yokeş MB, Bedir E. Biodiversity and bioactivity of some marine sediment derived actinomycetes from Turkey. N Biotechnol 2012. [DOI: 10.1016/j.nbt.2012.08.193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sevimli-Gur C, Yesil-Celiktas O, Vardar-Sukan F, Bedir E. Anticancer effects of methanolic, supercritical CO2 rosemary extracts, carnosic acid and rosmarinic acid. N Biotechnol 2012. [DOI: 10.1016/j.nbt.2012.08.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Gülcemal D, Masullo M, Bedir E, Festa M, Karayıldırım T, Alankus-Caliskan O, Piacente S. Triterpene glycosides from Astragalus angustifolius. Planta Med 2012; 78:720-729. [PMID: 22437244 DOI: 10.1055/s-0031-1298337] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Six new cycloartane-type (1- 6) and four new oleanane-type (7- 10) triterpene glycosides were isolated from Astragalus angustifolius Lam., together with five known triterpene glycosides. Their structures were established by the extensive use of 1D and 2D-NMR experiments along with ESIMS and HRMS analysis. Compounds 1- 3 are glycosides of cycloastragenol, while compounds 4- 6 show the C-24 epimer of cycloastragenol as aglycone, encountered for the first time in nature. All compounds were evaluated for their antiproliferative activity in Hela, H-446, HT-29, and U937 cell lines. Only compound 8 displayed a weak activity with IC (50) values of 36 and 50 µM against Hela and HT-29 cell lines, respectively.
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Affiliation(s)
- Derya Gülcemal
- Department of Chemistry, Faculty of Science, Ege University, Bornova, Izmir, Turkey
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Koz Ö, Ekinci D, Perrone A, Piacente S, Alankuş-Çalışkan Ö, Bedir E, Supuran CT. Analysis of saponins and phenolic compounds as inhibitors of α-carbonic anhydrase isoenzymes. J Enzyme Inhib Med Chem 2012; 28:412-7. [DOI: 10.3109/14756366.2011.651464] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Ömer Koz
- Department of Chemistry, Faculty of Science, Ege University,
Bornova, İzmir, Turkey
| | - Deniz Ekinci
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayıs University,
Samsun, Turkey
| | - Angela Perrone
- Department of Pharmaceutical Sciences, Salerno University,
Fisciano (Salerno), Italy
| | - Sonia Piacente
- Department of Pharmaceutical Sciences, Salerno University,
Fisciano (Salerno), Italy
| | | | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, Ege University,
Bornova, İzmir, Turkey
| | - Claudiu T. Supuran
- Laboratorio di Chimica Bioinorganica, Polo Scientifico, Università degli Studi di Firenze,
Florence, Italy
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Nalbantsoy A, Nesil T, Yılmaz-Dilsiz O, Aksu G, Khan S, Bedir E. Evaluation of the immunomodulatory properties in mice and in vitro anti-inflammatory activity of cycloartane type saponins from Astragalus species. J Ethnopharmacol 2012; 139:574-81. [PMID: 22155389 DOI: 10.1016/j.jep.2011.11.053] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Revised: 11/08/2011] [Accepted: 11/25/2011] [Indexed: 05/21/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Astragalus roots are used to treat leukemia and for their wound healing properties in Southeast Anatolia-Turkey. MATERIALS AND METHODS In vivo studies to investigate the effects of two Astragalus saponins were carried out on the immune response cytokines by using six to eight weeks old male Swiss albino mice. The production of IL-1β, TGF-1β, TNF-α, IL-2, IL-4 and IFN-γ cytokines was determined by ELISA. The spleen and lymph nodes, isolated from the mice subjects, were analyzed to realize induction of the surface antigen productions for IL-2Rα (CD25) and CD69. In addition, their effects on the targets of inflammation such as NF κB, iNOS and NAG-1 were investigated in cell-based assays. RESULTS The results suggested that AST VII and Mac B had positive effect on Th1 cytokine release (IL-2 and IFN-γ), and suppression on Th2 cytokine production (IL-4). The immunohistochemical results exhibited induction of both IL-Rα (CD25) and CD69 surface receptors justifying the Th1 cytokine release. The compounds did not affect NF-κB or NAG-1 activity but iNOS activity was inhibited by Mac B with an IC(50) of 156 μg/ml. CONCLUSIONS The results show that Ast VII and Mac B create powerful immunoregulatory effects without the stimulation of inflammatory cytokines in mice, and have no significant effect on the inflammatory cellular targets in vitro.
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Affiliation(s)
- Ayşe Nalbantsoy
- Ege University, Faculty of Engineering, Bioengineering Department, Bornova, Izmir, Turkey
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Orhan N, Aslan M, Pekcan M, Orhan DD, Bedir E, Ergun F. Identification of hypoglycaemic compounds from berries of Juniperus oxycedrus subsp. oxycedrus through bioactivity guided isolation technique. J Ethnopharmacol 2012; 139:110-118. [PMID: 22063725 DOI: 10.1016/j.jep.2011.10.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 10/07/2011] [Accepted: 10/20/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Decoction of Juniperus oxycedrus subsp. oxycedrus L. (Cupressaceae) berries is used internally as tea and pounded fruits are consumed to lower blood glucose levels in Turkey. AIM OF THE STUDY To evaluate hypoglycaemic and antidiabetic activity of J. oxycedrus subsp. oxycedrus berries and to identify active compounds through bioactivity guided isolation technique. MATERIAL AND METHODS Hypoglycaemic effect of J. oxycedrus subsp. oxycedrus (Joso) berry extracts on oral administration was studied using in vivo models in normal, glucose-hyperglycaemic rats. Streptozotocin induced diabetic rats were used to examine antidiabetic activity of Joso extracts, subextracts, fractions, subfractions and shikimic acid (SA). RESULTS Through in vivo bioactivity-guided fractionation processes, shikimic acid, 4-O-β-d-glucopyranosyl ferulic acid and oleuropeic acid-8-O-β-d-glucopyranoside were isolated from the n-butanol subextract by silica gel and reverse phase column chromatography as the main active ingredient of the active subfraction. After 8 days administration of the major compound shikimic acid, blood glucose levels (24%), malondialdehyde levels in kidney tissues (63-64%) and liver enzymes (AST, ALT, ALP) of diabetic rats were decreased. CONCLUSION Results indicated that Joso berry extract and its active constituents might be beneficial for diabetes and its complications.
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Affiliation(s)
- Nilüfer Orhan
- Gazi University, Faculty of Pharmacy, Department of Pharmacognosy, 06330, Etiler, Ankara, Turkey.
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