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ŞEN, ALİ

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2013 - 2019132020 - 20248
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Author: BİTİŞ, LEYLA ×

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Now showing 1 - 10 of 21
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    PublicationOpen Access
    Ethanol extract of Cotinus coggygria leaves accelerates wound healing process in diabetic rats
    (TAYLOR & FRANCIS LTD, 2016-11) ŞEN, ALİ; Aksoy, Halil; Sen, Ali; Sancar, Mesut; Sekerler, Turgut; Akakin, Dilek; Bitis, Leyla; Uras, Fikriye; Kultur, Sukran; Izzettin, Fikret Vehbi
    Context:Cotinus coggygria Scop. (Anacardiaceae) leaves that were used as wound healing in traditional Balkan and Anatolian folk medicine, could be potentially effective in treating diabetic wounds.Objective: This study investigates biochemical and histological effects of ethanol extract of C. coggygria (CCE) on excision wound model in diabetic rats.Materials and methods: This study was conducted on diabetic Wistar albino rats, which were injected by a single dose (50mg/kg i.p.) streptozotocin. Afterward an excision wound model was created in all animals; diabetic control rats were applied topically simple ointment and diabetic treatment rats were applied topically 5% (w/w) ointment with CC, once a day during the experimental period. Malondialdehyde, glutathione and hydroxyproline levels in wound tissues were investigated at the end of 3rd, 7th, and 14th days. Histopathological examination was also performed.Results: Hydroxyproline content was significantly increased in the CCE treated group versus control after the 3rd and 7th days (15.33 versus 11.83; 19.67 versus 15.67mg/g, p<0.05; respectively). A statistically significant elevation in glutathione at the end of 3rd, 7th, and 14th days (5.13 versus 1.58, p<0.05; 4.72 versus 1.88, p<0.05; 3.83 versus 1.88mol/g, p<0.05, respectively) and a statistically significant decrease in malondialdehyde level at the end of 7th day (4.49 versus 1.48nmol/g, p<0.05) were determined in the treated group versus control group. These results were also supported by histological analyses.Discussion and conclusion: These findings indicate that CCE accelerated the cutaneous wound healing process in diabetic wounds, in confirmation of its traditional use.
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    Chemical composition of endemic Stachys subnuda Montbret & Aucher ex Benth. essential oil and its anti-inflammatory and antioxidant activities
    (TAYLOR & FRANCIS INC, 2019) DOĞAN, AHMET; Sen, Ali; Kurkcuoglu, Mine; Bitis, Leyla; Dogan, Ahmet; Baser, Kemal Husnu Can
    The essential oil of aerial parts of Stachys subnuda Montbret & Aucher ex Benth (S. subnuda) was analyzed by gas chromatography (GC) and GC/mass spectrometry (MS). Anti-inflammatory activity was evaluated by lipoxygenase inhibition assay. The antioxidant activity was determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azinobis-3-ethylbenzothiozoline-6-sulfonic acid (ABTS) assays. Sixty-two constituents, comprising 97.1% of the total essential oil composition, were identified. Phytol (25.2%), beta-caryophyllene (11.2%), germacrene D (6.9%), and hexadecanoic acid (6.9%) were the major compounds of aerial part essential oils of S. subnuda. The essential oil showed significant radical scavenging activity with 50% inhibition (IC50) values of 0.124 and 0.204 mg/mL for ABTS and DPPH radicals, respectively. The essential oil exhibited moderate anti-inflammatory activity with an IC50 value of 0.419 mg/mL. The results indicated that S. subnuda essential oil had good anti-inflammatory and antioxidant activity. Also, this is first study on chemical composition, anti-inflammatory and antioxidant activity of S. subnuda essential oil.
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    PublicationOpen Access
    In vitro investigation of antimicrobial, enzyme inhibitory and free radical scavenging activities of Inula salicina L.
    (2022-09-01) YILDIRIM, AYBENİZ; ŞEN, ALİ; ŞENKARDEŞ, İSMAİL; BİTİŞ, LEYLA; Yıldırım A., ŞEN A., HACIOĞLU M., BİRTEKSÖZ TAN A. S. , ŞENKARDEŞ İ., BİTİŞ L.
    In this study, in vitro biological activities and total phenol/flavonoid contents of methanol extract (ISM) and its hexane (ISH), chloroform (ISC), ethyl acetate (ISEA) and aqueous methanol (ISAM) fractions obtained from aerial parts of Inula salicina were investigated. ISEA showed the highest antioxidant activity against DPPH and ABTS radicals with an IC50 value of 0.014 mg ml-1 for both assays. ISEA exhibited a good anti-inflammatory activity with an IC50 value of 0.060 mg ml-1 . ISEA was found to exhibit a moderate level of antidiabetic activity against α amylase enzyme with an IC50 value of 0.290 mg ml-1 . ISEA and ISM presented low and moderate inhibitory activity against acetylcholinesterase and butyrylcholinesterase enzymes with IC50 values of 0.577 and 0.279 mg ml-1 , respectively. ISC with MIC values of 78 and 156 µg ml-1 displayed a significant antimicrobial activity against Staphylococcus aureus and S. epidermidis, respectively. Almost all extracts had moderate effect against Candida species. The highest total phenolic and flavonoid contents were determined in ISEA with 574.8 mg GAE (gallic acid equivalent) g -1 extract and 30.48 mg QE (quercetin equivalent) g -1 extract, respectively. These results showed that ISEA had a good antioxidant and anti-inflammatory activity with moderate α-amylase and butyrylcholinesterase inhibitory activity. Also, ISC exhibited a significant antimicrobial activity against Staphylococcus species.
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    THERAPEUTIC POTENTIAL OF MYRTUS COMMUNIS SUBSP COMMUNIS EXTRACT AGAINST ACETIC ACID-INDUCED COLONIC INFLAMMATION IN RATS
    (WILEY, 2017) ŞEN, ALİ; Sen, Ali; Yuksel, Meral; Bulut, Gizem; Bitis, Leyla; Ercan, Feriha; Ozyilmaz-Yay, Nagehan; Akbulut, Ozben; Cobanoglu, Hamit; Ozkan, Sevil; Sener, Goksel
    The aim of this study was to evaluate the effect of ethanol extract from leaves of Myrtus communis subsp. communis (MC) on acetic acid (AA)-induced ulcerative colitis in rats. On the fourth day of colitis induction, all rats were decapitated. Colitis was assessed by macroscopic and microscopic scores and by measuring malondialdehyde (MDA) and glutathione (GSH) levels, myeloperoxidase (MPO) activity, luminol, lucigenin, nitric oxid and peroxynitrite chemiluminescence (CL). Colitis caused significant increases in the colonic MDA levels, MPO activity, CL values, macroscopic and microscopic damage scores along with significant decrease in tissue GSH level. However, treatment with MC extract reversed all these biochemical indices, as well as histopathological alterations induced by AA with the protective effects being similar to that of sulphasalazine treatment. The study showed that MC extract could alleviate colitis in rats and can be considered an alternative therapeutic approach for management of inflammatory bowel diseases (IBD).
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    PublicationOpen Access
    In vitro antiproliferative, antioxidant, anti-inflammatory activities and phenolic profile of Centaurea saligna ( K.Koch) Wagenitz
    (MARMARA UNIV, 2022) ŞEN, ALİ; Yildirim, Aybeniz; Sen, Ali; Goger, Fatih; Ozakpinar, Ozlem Bingol; Bitis, Leyla
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    PublicationOpen Access
    Two Acylated Isoscutellarein Glucosides with Anti-Inflammatory and Antioxidant Activities Isolated from Endemic Stachys Subnuda Montbret & Aucher ex Benth
    (SLOVENSKO KEMIJSKO DRUSTVO, 2019-12-18) DOĞAN, AHMET; Sen, Ali; Goger, Fatih; Dogan, Ahmet; Bitis, Leyla
    In this study, we report anti-inflammatory and antioxidant activities of two acylated isoscutellarein glucosides isolated from ethyl acetate extract of Stachys subnuda aerial part. 4'-O-methylisoscutellarein-7-O-2 ''-O-(6 ''' acetyl-beta-D-allopyranosyl)-beta-D-glucopyranoside (SS1) and isoscutellarein-7-O-2 ''-O-(6 '''-O-acetyl-beta-D allopyranosyl)-beta-D -glucopyranoside (SS2) were isolated as major compounds from ethyl acetate extract (SSEA). Also, 2 hydroxycinnamic acid derivatives, and 5 isoscutellarein glucoside derivatives in the SSEA were identified using LC-MS/MS. SS1 with IC50 values of 2.35 and 1.98 mu g/mL and SS2 with IC50 values 13.94 and 12.76 mu g/mL showed fairly strong antioxidant activity against DPPH (1,1-diphenyl-2-picrylhydrazyl) and ABTS (2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid) radicals, respectively. SS1 and SS2 inhibited 5-lipoxygenase (5-LOX) activity with IC(50 )values of 47.23 and 41.60 mu g/mL, respectively. The results demonstrated that SS1 and SS2 have significant anti-inflammatory and antioxidant potential. Acylated flavonoid glycosides have been first reported for Stachys subnuda. Also, the activities of SS1 and SS2 have been investigated for the first time in this study.
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    Essential oil composition of different parts of Tanacetum cilicicum (Boiss.) Grierson
    (Badebio Biotechnololgy Ltd, 2020) DOĞAN, AHMET; Şen A., Kürkçüoğlu M., Bitiş L., Doğan A., Başer K.H.C.
    The aim of this study was to investigate and compare the chemical composition of essential oils obtained by Clevenger-type apparatus from capitula (TCC) and aerial parts including leaves and stems (TCA) of Tanacetum cilicicum (Boiss.) Grierson from Turkey. TCC and TCA essential oils were separately analysed by GC-FID and GC/MS. Forty and thirty-two compounds were identified, representing 99% and 94.4% of the oils of TCC and TCA essential oils, respectively. The main constituents of the oil of the TCC were camphor (28.8%), (E)-nerolidol (16.9%), trans-chrysanthenyl acetate (12.8%) and 1,8-cineole (8.9%), whereas the oil from TCA comprised mainly trans-chrysanthenyl acetate (22.2%), borneol (19.4%), camphor (11.2%), 1,8-cineole (10.2%) and (E)-nerolidol (9.2%). The results showed that TCC and TCA essential oils were rich in oxygenated monoterpenes and oxygenated sesquiterpenes. This study is the first to study the essential oil composition of different parts of Tanacetum cilicicum separately. Also, to the our best of our knowledge, (E)-nerolidol was found in the Tanacetum species as the major compound for the first time. © 2020, Badebio Biotechnololgy Ltd. All rights reserved.
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    PublicationOpen Access
    Biological activities of aerial parts extracts of endemic Tanacetum argenteum subsp. argenteum
    (MARMARA UNIV, FAC PHARMACY, 2017-04-01) ŞEN, ALİ; Sen, Ali; Ozakpinar, Ozlem Bingol; Tan, Seher Birteksoz; Kultur, Sukran; Uras, Fikriye; Bitis, Leyla
    The objective of the present study was to investigate the antimicrobial and anti-proliferative activities of n-hexane, chloroform, methanol and aqueous methanol extracts obtained from Tanacetum argenteum subsp. argenteum aerial parts. Anti-proliferative activity was tested in vitro against four human cancer cell lines (A549: lung adenocarcinoma, Hela; cervix adenocarcinoma, HT-29: colon adenocarcinoma, MCF-7; breast adenocarcinoma) using MTT assay. Antimicrobial activity was assessed by micro-broth dilution technique against Staphylococcus aureus ATCC 29213, Staphylococcus epidermidis ATCC 12228, Escherichia coli ATCC 25922, Enterococcus faecalis ATCC 29212, Klebsiella pneumoniae ATCC 4352, Pseudomonas aeruginosa ATCC 27853, Proteus mirabilis ATCC 14153, and Candida albicans ATCC 10231. Hexane extract inhibited proliferation of HT-29 and MCF-7 by 75 and 74% while chloroform extract against the same cancer cell lines displayed inhibition of 89 and 73% at the concentration of 30 mu g/mL, respectively. Also, chloroform extract at the same concentration showed significant anti-proliferative activity against A-549 and HeLa with inhibition values of 75% and 62%. Chloroform extract exhibited moderate antibacterial activity against Staphylococcus aureus and S. epidermidis with the MIC values of 625 mu g/mL. Methanol and aqueous methanol extracts showed weak antimicrobial activity against Staphylococcus epidermidis and Candida albicans with MIC values of 1250 mu g/mL. The results showed that n-hexane and chloroform extracts have significant anticancer activity against cancer cell lines used in this study.
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    PublicationOpen Access
    Protective effects of Rubus tereticaulis leaves ethanol extract on rats with ulcerative colitis and bio-guided isolation of its active compounds: A combined in silico, in vitro and in vivo study
    (2022-11-01) ŞEN, ALİ; ÖZBEYLİ, DİLEK; ERTAŞ, BÜŞRA; DOĞAN, AHMET; BİTİŞ, LEYLA; Şen A., Özbeyli D., Teralı K., Göger F., Yıldırım A., Ertaş B., Doğan A., Bitiş L., Şener G.
    The aim of this study was to evaluate the therapeutic effect of active ethanol extract obtained from the leaves of Rubus tereticaulis (RTME) against colitis, and to purify major compounds from this extract by bioassay-directed isolation. Rats with colitis induced via intra-rectal acetic acid administration (5%, v/v) received RTME or sulfasalazine for three consecutive days. On day four, all rats were decapitated, and the colonic tissue samples were collected for macroscopic score, colon weight, reduced glutathione (GSH), myeloperoxidase (MPO), and malondialdehyde (MDA) analyses. The active compounds and chemical composition of RTME were determined by bio-guided isolation and LC-MS/MS, respectively. Compared to the colitis group, the rats treated with RTME displayed significantly lowered macroscopic scores and colon wet weights (p < 0.001). These effects were confirmed biochemically by a decrease in colonic MPO activity (p < 0.001), MDA levels (p < 0.001), and an increase in GSH levels (p < 0.001). Kaempferol-3-O-β-d-glucuronide (RT1) and quercetin-3-O-β-d-glucuronide (RT2) were found to be the major compounds of RTME, as evidenced by in vitro anti-inflammatory and antioxidant activity-guided isolation. Their anti-inflammatory/antioxidant activities were also predicted by docking simulations. Additionally, quinic acid, 5-caffeoylquinic acid, quercetin pentoside, quercetin glucoside, quercetin-3-O-β-d-glucuronide, kaempferol-3-O-β-d-glucuronide, and kaempferol rutinoside were identified in RTME via using LC-MS/MS. RT2, along with other compounds, may be responsible for the observed protective action of RTME against colitis. This study represents the first report on the beneficial effects of RTME in an experimental model of colitis and highlights the potential future use of RTME as a natural alternative to alleviate colitis.
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    PublicationOpen Access
    Antioxidant and anti-inflammatory activity of capitula, leaf and stem extracts of Tanacetum cilicicum (Boiss.) Grierson
    (2019-06-13) DOĞAN, AHMET; Aybeniz YILDIRIM;ALİ ŞEN;AHMET DOĞAN;LEYLA BİTİŞ
    In this study, various extracts obtained different parts of Tanacetumcilicicum were investigated for in vitro antioxidant and anti-inflammatoryactivity. Antioxidant activity was tested with three methods; namely 2.2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity, 2.2′‐azinobis (3‐ethylbenzothiazolin‐6‐sulphonic acid) (ABTS) radical cation scavengingcapacity, and ferric-reducing antioxidant power (FRAP) assays. Total phenolicand flavonoid contents of extracts were determined by Folin-Ciocalteu andaluminum chloride methods, respectively. Also, anti-inflammatory activity ofthese extracts was evaluated by 5-lipoxygenase inhibition assay. Ethyl acetateextract of capitula of T. cilicicum (TCCEA) showed the highest antioxidantactivity with IC50 values of 22.44 and 30.86 μg/mL against DPPH and ABTSradicals, respectively. At the same time, the highest ferric reducing power wasfound in the TCCEA (42.2 mg TE/g extract). The highest total phenolic contentshave been detected in TCCEA and ethyl acetate extract of leaves of T. cilicicum(TCLEA) with value of 174.1 and 175.6 mg GAE/g extract, respectively.Similarly, the highest total flavonoid contents have been detected in TCCEA andTCLEA with values of 26.94 and 30.48 mg QE/g extract, respectively. TCCEAexhibited strong anti-inflammatory activity with IC50 value of 9.44 μg/mL whencompared to standard indomethacine (22.39 μg/mL). These results demonstratethat TCCEA has a significant antioxidant and anti-inflammatory activity. Also,the results show that TCCEA is a good candidate for further bioactivity-guidedfractionation in the search for new active anti-inflammatory and antioxidantcompounds.