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Zeitschrift Für Naturforschung. C, A Journal of Biosciences

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https://www.readbyqxmd.com/read/29466245/effect-of-the-arctic-terrestrial-plant-ranunculus-hyperboreus-on-lps-induced-inflammatory-response-via-mapk-pathways
#1
Chang-Suk Kong, Jung Im Lee, Fatih Karadeniz, Hojun Kim, Youngwan Seo
The Arctic flora hosts a limited number of species due to its extreme environmental conditions which also yield novel and unique secondary metabolites from withstanding plants. Considering a lack of research on bioactivity potential of Arctic flora, Ranunculus hyperboreus, an Arctic plant, was studied for its anti-inflammatory potential as a part of ongoing research on discovering novel natural bioactive products. Solvent-based fractions (H2O, n-BuOH, 85% aq. MeOH, n-hexane) from R. hyperboreus extract were observed to decrease the elevated nitrate amount during the inflammatory response of lipopolysaccharide-induced mouse macrophage RAW264...
February 21, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29455192/cloning-and-expression-analysis-of-cdnas-encoding-adp-glucose-pyrophosphorylase-large-and-small-subunits-from-hulless-barley-hordeum-vulgare-l-var-nudum
#2
Dongmei Li, Zhimin Yang, Xinchun Liu, Zhen Song, Zongyun Feng, Yang He
As an important plateau cereal crop, hulless barley is the principal food for the Tibetan people in China. ADP-glucose pyrophosphorylase (AGPase) is considered as the key enzyme for starch biosynthesis in plants. In this study, cDNAs encoding the small subunit (SSU I) and large subunit (LSU I) of AGPase were isolated from hulless barley. The results showed that SSU I and LSU I were 1438 and 1786 bp in length with a complete open reading frame (ORF) of 1419 and 1572 bp. The ORF-encoded polypeptides of 472 and 523 amino acids were having calculated molecular masses of 52...
February 19, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29451865/flavonoids-and-triterpenes-from-combretum-fragrans-with-anti-inflammatory-antioxidant-and-antidiabetic-potential
#3
Amadou Dawé, Marius Mbiantcha, Fawai Yakai, Almas Jabeen, Muhammad Shaiq Ali, Mehreen Lateef, Bonaventure Tchaleu Ngadjui
Despite the well-documented benefits of Combretum fragrans in Cameroon, only few scientific works have been done on it. In this study we isolated eight compounds from the leaves extract of C. fragrans: velutin (1), belamcanidin (2), cirsilineol (3), cirsimaritin (4), 3β-acetoxy-20,24-epoxy-11,25-hydroxy-dammarane (5), combretin A (6), combretin B (7) and a mixture of arjunolic acid (8a) and asiatic acid (8b). Compounds 6 and 7 presented potent anti-inflammatory, antioxidant and antidiabetic activities. Compounds 1, 3, 5 and the mixture of 8a and 8b were significantly active, and compounds 2 and 4 presented moderate activity for reactive oxygen species inhibitory and free-radical scavenging...
February 16, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29432208/transcriptome-profiling-reveals-an-iaa-regulated-response-to-adventitious-root-formation-in-lotus-seedling
#4
Cheng Libao, Jiang Runzhi, Yang Jianjun, Xu Xiaoyong, Zeng Haitao, Li Shuyan
Adventitious roots (ARs) of lotus (Nelumbonucifera Gaertn.) play a critical role in water and nutrient uptake. We found that exogenously applied 10-μM indole-3-acetic acid (IAA) promoted the formation of ARs, while 150-μM IAA significantly inhibited the emergence of ARs. However, little is known about these different responses to various concentrations of IAA at the molecular level. This study, therefore, examined the gene expression profiling in four libraries treated with 10- and 150-μM IAA based on the high-throughout tag sequencing technique...
February 12, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29397024/pseudomonas-and-burkholderia-inhibit-growth-and-asexual-development-of-phytophthora-capsici
#5
Amena Khatun, Tarin Farhana, Abdullah As Sabir, Shah Mohammad Naimul Islam, Helen M West, Mahfuzur Rahman, Tofazzal Islam
The objective of this study was to isolate and characterize antagonistic rhizobacteria from chili against a notorious phytopathogen Phytophthora capsici. Among the 48 bacteria isolated, BTLbbc-02, BTLbbc-03, and BTLbbc-05 were selected based on their inhibitory activity against P. capsici. They were tentatively identified as Burkholderia metallica BTLbbc-02, Burkholderia cepacia BTLbbc-03, and Pseudomonas aeruginosa BTLbbc-05, respectively, based on their 16S rRNA gene sequencing. All inhibited the growth of P...
February 3, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29353267/bioactive-pyrrole-alkaloids-isolated-from-the-red-sea-marine-sponge-stylissa-carteri
#6
Ashraf N E Hamed, Roland Schmitz, Anja Bergermann, Frank Totzke, Michael Kubbutat, Werner E G Müller, Diaa T A Youssef, Mokhtar M Bishr, Mohamed S Kamel, RuAngelie Edrada-Ebel, Wim Wätjen, Peter Proksch
Fifteen pyrrole alkaloids were isolated from the Red Sea marine sponge Stylissa carteri and investigated for their biological activities. Four of them were dibrominated [(+) dibromophakelline, Z-3-bromohymenialdisine, (±) ageliferin and 3,4-dibromo-1H-pyrrole-2-carbamide], nine compounds were monobrominated [(-) clathramide C, agelongine, (+) manzacidin A, (-) 3-bromomanzacidin D, Z-spongiacidin D, Z-hymenialdisine, 2-debromostevensine, 2-bromoaldisine and 4-bromo-1H-pyrrole-2-carbamide)] and finally, two compounds were non-brominated derivatives viz...
January 20, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29320368/pobeguinine-a-monoterpene-indole-alkaloid-and-other-bioactive-constituents-from-the-stem-bark-of-nauclea-pobeguinii
#7
Jean J K Bankeu, Stéphanie Madjouka, Guy R T Feuya, Yannick S F Fongang, Sadaf Siddiqui, Iftikhar Ali, Lateef Mehreen, Bruno N Lenta, Sammer Yousuf, Didérot T Noungoué, Augustin S Ngouela, Muhammad S Ali
Phytochemical investigation of dichloromethane neutral phase of stem bark of Nauclea pobeguinii led to the isolation of a new monoterpene indole alkaloid, pobeguinine 1 along with 14 known compounds including (-)-naucleofficine D (2a), (+)-naucleofficine D (2b), naucleidinal (3), quafrinoic acid (4), betulinic acid (5), ursolic acid (6), quinovic acid (7), quinovic acid 3-O-α-L-rhamnopyranoside (8a), quinovic acid 3-O-β-D-fucopyranoside (8b), β-sitosterol (9), β-sitosterol 3-O-β-D-glucopyranoside (10), benzoic acid (11), lacceroic acid (12) and n-heptacosane (13)...
January 10, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29320367/antimicrobial-and-antioxidant-activities-of-two-polyketides-from-lichen-endophytic-fungus-preussia-sp
#8
Babita Paudel, Keshab Bhattarai, Hari Datta Bhattarai
Two compounds, compounds 1 and 2, were isolated from Preussia sp. The molecular structures of both compounds were elucidated by analyzing one-dimensional (1D) and 2D nuclear magnetic resonance data along with high-resolution mass spectrometry data. Compound 1 was obtained as novel in structure, and compound 2 was recently reported elsewhere. Compound 1 did not show antioxidant and antimicrobial activities and brine shrimp toxicity, while compound 2 showed strong antioxidant activity (DPPH reduction capacity; IC50=3 μg/mL) and brine shrimp toxicity (LD50=50 μg/mL)...
January 10, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29306935/quaternized-zn-ii-phthalocyanines-for-photodynamic-strategy-against-resistant-periodontal-bacteria
#9
Vesselin Kussovski, Vanya Mantareva, Mahmut Durmuş, Ivan Angelov
Photodynamic inactivation (PDI) has been featured as an effective strategy in the treatment of acute drug-resistant infections. The efficiency of PDI was evaluated against three periodontal pathogenic bacteria that were tested as drug-resistant strains. In vitro studies were performed with four water-soluble cationic Zn(II) phthalocyanines (ZnPc1-4) and irradiation of a specific light source (light-emitting diode, 665 nm) with three doses (15, 36 and 60 J/cm2). The well detectable fluorescence of ZnPcs allowed the cellular imaging, which suggested relatively high uptakes of ZnPcs into bacterial species...
January 8, 2018: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29283883/screening-of-the-five-different-wild-traditional-and-industrial-saccharomyces-cerevisiae-strains-to-overproduce-bioethanol-in-the-batch-submerged-fermentation
#10
Reza Shaghaghi-Moghaddam, Hoda Jafarizadeh-Malmiri, Parviz Mehdikhani, Sepide Jalalian, Reza Alijanianzadeh
Efforts to produce bioethanol with higher productivity in a batch submerged fermentation were made by evaluating the bioethanol production of the five different strains of Saccharomyces cerevisiae, namely, NCYC 4109 (traditional bakery yeast), SFO6 (industrial yeast), TTCC 2956 (hybrid baking yeast) and two wild yeasts, PTCC 5052 and BY 4743. The bioethanol productivity and kinetic parameters for all five yeasts at constant fermentation conditions, during 72 h, were evaluated and monitored. The obtained results indicated that compared to the wild yeasts, both traditional bakery (NCYC 4109) and industrial (SFO6) yeasts had higher bioethanol productivity (0...
December 28, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29197862/monoterpenes-induce-the-heat-shock-response-in-arabidopsis
#11
Masakazu Hara, Naoya Yamauchi, Yoshiki Sumita
Monoterpenes are common constituents of essential oils produced by plants. Although it has been reported that monoterpenes enhanced the heat tolerance of plants, the mechanism has not been elucidated. Here, we tested whether 13 monoterpenes promoted the heat shock response (HSR) in Arabidopsis. To assess the HSR-inducing activity of monoterpenes, we produced transgenic Arabidopsis, which has the β-glucuronidase gene driven by the promoter of a small heat shock protein (HSP17.6C-CI) gene. Results indicated that two monocyclic and four bicyclic monoterpenes showed HSR-inducing activities using the reporter gene system...
December 4, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29182515/sesquiterpenes-from-the-saudi-red-sea-litophyton-arboreum-with-their-cytotoxic-and-antimicrobial-activities
#12
Lamia T Abou El-Kassem, Usama W Hawas, Samy K El-Desouky, Radwan Al-Farawati
A new pseudoguaiane-type sesquiterpene named litopharbol (1) was isolated from the methanolic extract of the Red Sea soft coral Litophyton arboreum, along with known sesquiterpenoids alismol (2), alismorientol B (3), teuhetenone A (4), and calamusin I (5); steroid, 24-methyl-cholesta-5,24(28)-diene-3β-ol (6), alkyl glyceryl ether, chimyl alcohol (7); sphingolipid, erythro-N-dodecanoyl-docosasphinga-(4E,8E)-dienine (8); and nitrogenous bases, thymine (9) and thymidine (10). The structures were determined on the basis of nuclear magnetic resonance (NMR) spectroscopic (1D and 2D NMR data including heteronuclear single quantum coherence spectroscopy, heteronuclear multiple-bond correlation spectroscopy, and nuclear Overhauser effect spectroscopy) and mass spectrometric analyses...
November 28, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29161234/synthesis-of-methyl-4-dihydrotrisporate-b-and-methyl-trisporate-b-morphogenetic-factors-of-zygomycetes-fungi
#13
Yoko Nakamura, Christian Paetz, Wilhelm Boland
(9Z)-Methyl 4-dihydrotrisporate B and (9Z)-methyl trisporate B, pheromones of Zygomycetes fungi, have been synthesized using Stille cross-coupling from previously described cyclohexenone precursors. Conducting the coupling without protection groups allowed for a short and stereospecific synthesis route of the late trisporoids. Stability studies for both the compounds revealed (9Z)-methyl trisporate B to be very unstable against UV irradiation.
November 21, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29145173/a-new-method-for-fast-extraction-and-determination-of-chlorophylls-in-natural-water
#14
Nianwei Qiu, Xiushun Wang, Feng Zhou
Algae collection and chlorophyll extraction are two troublesome steps in the traditional methods used for the determination of chlorophyll concentration in natural water. A new method was established in this study for fast collection and extraction of chlorophyll. Based on our results, the optimum centrifugation condition for collecting algae was determined as: 5000 g for 15 min at 4 °C, and the optimum dilution ratio of dimethyl sulfoxide: 90% acetone was 1:4. The specific steps were as follows: the algae in water samples were collected by centrifugation at 5000 g at 4 °C for 15 min...
November 16, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29145172/volatiles-from-cinnamomum-cassia-buds
#15
Daniel Sandner, Ulrich Krings, Ralf G Berger
While the chemical composition of leaf and stem bark essential oils of the Chinese cinnamon, Cinnamomum cassia (L.) J. Presl, has been well investigated, little is known about the volatilom of its buds, which appeared recently on German markets. Soxhlet extracts of the commercial samples were prepared, fractionated using silica gel and characterised by gas chromatography-flame ionisation detector (GC-FID) for semi-quantification, by gas chromatography-mass spectrometry (GC-MS) for identification and by GC-FID/olfactometry for sensory evaluation...
November 16, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29116938/mangostanaxanthone-vii-a-new-cytotoxic-xanthone-from-garcinia-mangostana
#16
Sabrin R M Ibrahim, Gamal A Mohamed, Mahmoud A Elfaky, Mohamed F Zayed, Amal A El-Kholy, Osama H Abdelmageed, Samir A Ross
Garcinia mangostana L. (the queen of fruits, mangosteen, family Guttiferae) is a wealthy source of xanthones. The CHCl3 soluble fraction of the air-dried pericarps of G. mangostana provided a new xanthone: mangostanaxanthone VII (5), along with four known xanthones: mangostanaxanthones I (1) and II (2), gartanin (3) and γ-mangostin (4). The structural verification of these metabolites was achieved by different spectral techniques, including UV, IR, 1D and 2D NMR and HRESIMS. The new metabolite was assessed for cytotoxic potential, using sulforhodamine B (SRB) assay towards the A549 and MCF-7 cancer cell lines...
November 8, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29116937/synthesis-and-biological-evaluation-of-acyl-derivatives-of-hydroxyflavones-as-potent-antiproliferative-agents-against-drug-resistance-cell-lines
#17
Monika Stompor, Marta Świtalska, Joanna Wietrzyk
The synthesis of hydroxyflavone derivatives is described. The acyl derivatives of 3-, 6-, 7-hydroxyflavones (compounds 2, 4, 6, respectively) and chrysin (5,7-dihydroxyflavone, 7) were obtained in high yields and evaluated in vitro for their cytotoxic activity against several cancer cell lines of different origin: MCF-7 (breast cancer), A549 (nonsmall cell lung cancer), MES-SA (uterine sarcoma), LoVo (colon cancer), drug-resistant human cancer cells (MES-SA/DX5, LoVo/DX) and also towards non-cancer cell line MCF-10A (normal breast epithelial cells)...
November 8, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29016357/corrigendum-to-ginkgetin-inhibits-proliferation-of-human-leukemia-cells-via-the-tnf-%C3%AE-signaling-pathway
#18
Ling-Ling Pan, Wen-Jun Wu, Gao-Feng Zheng, Xiao-Yan Han, Jing-Song He, Zhen Cai
No abstract text is available yet for this article.
October 26, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28937967/acetogenins-and-alkaloids-during-the-initial-development-of-annona-muricata-l-annonaceae
#19
Christian Anabí Riley-Saldaña, María Del Rocío Cruz-Ortega, Mariano Martínez Vázquez, Iván De-la-Cruz-Chacón, Marisol Castro-Moreno, Alma Rosa González-Esquinca
In plants, the presence and distribution of specialized metabolites during the early stages of development are not documented enough, even though their biosynthesis is one of the most important strategies for survival. In this study, five alkaloids and four acetogenins were detected in Annona muricata L. during early development seedling, including three phases of root emergence and three of seedling formation. Hexane and alkaloid extracts were obtained from each organ, which were analyzed in a gas-mass chromatograph and in a high-performance liquid chromatograph coupled with a photodiode array UV detector (HPLC-DAD)...
October 26, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28902633/ginkgetin-inhibits-proliferation-of-human-leukemia-cells-via-the-tnf-%C3%AE-signaling-pathway
#20
Ling-Ling Pan, Wen-Jun Wu, Gao-Feng Zheng, Xiao-Yan Han, Jing-Song He, Zhen Cai
Ginkgetin is known to be an anticancer agent in many studies. However, its effectiveness in treating chronic lymphoblastic leukemia (CLL) remains unknown. The present study aimed to evaluate the effects of ginkgetin on the growth of the K562 cell line. The MTT assay was employed to examine the proliferation of K562, and a terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end labeling (TUNEL) staining was conducted to detect the apoptotic rates. Furthermore, changes of tumor necrosis factor-α (TNF-α) were detected by Western blot analysis...
October 26, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
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