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Phytochemical study of individual plant species of Bergenia genus
Hendrychová, Helena ; Tůmová, Lenka (advisor) ; Nagy, Milan (referee) ; Šmejkal, Karel (referee)
Charles University in Prague, Faculty of Pharmacy in Hradec Králové Department of Pharmacognosy Candidate: Mgr. Helena Hendrychová Supervisor: doc. PharmDr. Lenka Tůmová, CSc. Title of Doctoral Thesis: Phytochemical study of individual plant species of Bergenia genus Bergenia, native to central Asia, is promising source of medicinal compounds mainly in the system of Chinese and Indian traditional medicine. These species have been used for centuries in therapy of various diseases. They are valued for their ability to dissolve kidney or bladder stones. Bergenia plants are used for therapy of pulmonary diseases and cold. They have demonstrated antioxidant, antibacterial, antiviral, immunostimulant, anti-inflammatory, anticancer, antidiabetic, antitussive, hepatoprotective and diuretic effects. The main aim of this thesis was to determine the content of secondary metabolites (arbutin, total polyphenols, bergenin and anthocyanins) in three taxons of Bergenia genus - Bergenia crassifolia (L.) Fritsch, Bergenia ciliata (Haw.) Sternb. a Bergenia x ornata Stein., to compare their biological activities and to identify the most appropriate kind of Bergenia plants with the greatest potential for use in therapy. Plant hybrid B. x ornata was evaluated on the content of phenolic compounds and biological activity...
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Alkaloids of the Amaryllidaceae family as potential drugs in therapy of diseases of affluence
Breiterová, Kateřina ; Cahlíková, Lucie (advisor) ; Nagy, Milan (referee) ; Lapčík, Oldřich (referee)
Charles University, Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Botany Candidate: Mgr. Kateřina Breiterová Supervisor: Assoc. prof. Ing. Lucie Cahlíková PhD. Title of Doctoral Thesis: Alkaloids of the Amaryllidaceae family as potential drugs in therapy of diseases of affluence Key words: alkaloids, Amaryllidaceae, analogues, AChE, BuChE, POP, GSK-3β, cell cycle progression, apoptosis Narcissus cv. Professor Einstein was chosen based on results of previous screening studies for detailed phytochemical work for the purpose of isolation of the widest range of AmA. From 34,3 kg of fresh bulbs was obtained 31,7 g of purified alkaloidal extract, which was processed using column chromatography with stepwise elution by light petrol, chloroform and ethanol in different ratios to almost 500 fractions. These fractions were fused into 27 subfractions, which were processed by preparative TLC, vacuum column chromatography and crystallization. Finally, 25 pure alkaloids were isolated. All compounds were identified by GC-MS, ESI-MS, NMR, optical rotation and literature. One compound was identified as a new unpublished alkaloid of lycorine structure type. All alkaloids isolated in sufficient amount were tested for their biological activities associated with Alzheimer's disease (inhibition of...
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Alkaloids of genus Hippeastrum (Amaryllidaceae): isolation, identification, biological activity
Al Shammari, Latifah Ajaj M ; Cahlíková, Lucie (advisor) ; Nagy, Milan (referee) ; Šmejkal, Karel (referee)
Charles University in Prague, Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Botany Candidate: MSc. Latifah Al Shammari Supervisor: Prof. Ing. Lucie Cahlíková, Ph.D. Title of Doctoral Thesis: Alkaloids of the genus Hippeastrum (Amaryllidaceae): isolation, identification, biological activity. Hippeastrum x hybridum cv. Ferrari was chosen based on results of previous screening studies for detailed phytochemical study for the purpose of isolation of the widest range of AAs. From 25 kg of fresh bulbs was obtained 29,46 g of purified alkaloidal extract, which was processed using column chromatography. Finally, 18 pure alkaloids were isolated including one new homolycorine-type alkaloid (9-O-demethyllycorenine). All compounds were identified by spectrometric techniques (GC-MS, ESI-MS, NMR, optical rotation) and by comparison with literature data. All alkaloids, isolated in sufficient amount, were tested for their biological activities associated with Alzheimer's disease (inhibition of hAChE, hBuChE, and POP), and cytotoxic activity. The inhibitory activity against human cholinesterases was determined in vitro by a modified Ellmanʼs spectrophotometric method. In the hAChE/hBuChE assay, except for 1,2- O,O'-diacetyl-dihydrolycorine which demonstrated a mild hBuChE inhibition potency...
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Alkaloids of the Amaryllidaceae family as potential drugs in therapy of diseases of affluence
Breiterová, Kateřina ; Cahlíková, Lucie (advisor) ; Nagy, Milan (referee) ; Lapčík, Oldřich (referee)
Charles University, Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Botany Candidate: Mgr. Kateřina Breiterová Supervisor: Assoc. prof. Ing. Lucie Cahlíková PhD. Title of Doctoral Thesis: Alkaloids of the Amaryllidaceae family as potential drugs in therapy of diseases of affluence Key words: alkaloids, Amaryllidaceae, analogues, AChE, BuChE, POP, GSK-3β, cell cycle progression, apoptosis Narcissus cv. Professor Einstein was chosen based on results of previous screening studies for detailed phytochemical work for the purpose of isolation of the widest range of AmA. From 34,3 kg of fresh bulbs was obtained 31,7 g of purified alkaloidal extract, which was processed using column chromatography with stepwise elution by light petrol, chloroform and ethanol in different ratios to almost 500 fractions. These fractions were fused into 27 subfractions, which were processed by preparative TLC, vacuum column chromatography and crystallization. Finally, 25 pure alkaloids were isolated. All compounds were identified by GC-MS, ESI-MS, NMR, optical rotation and literature. One compound was identified as a new unpublished alkaloid of lycorine structure type. All alkaloids isolated in sufficient amount were tested for their biological activities associated with Alzheimer's disease (inhibition of...
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Alkaloids of the Amaryllidaceae family as potential drugs in therapy of diseases of affluence
Breiterová, Kateřina ; Cahlíková, Lucie (advisor) ; Lapčík, Oldřich (referee) ; Nagy, Milan (referee)
Charles University, Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Botany Candidate: Mgr. Kateřina Breiterová Supervisor: Assoc. prof. Ing. Lucie Cahlíková PhD. Title of Doctoral Thesis: Alkaloids of the Amaryllidaceae family as potential drugs in therapy of diseases of affluence Key words: alkaloids, Amaryllidaceae, analogues, AChE, BuChE, POP, GSK-3β, cell cycle progression, apoptosis Narcissus cv. Professor Einstein was chosen based on results of previous screening studies for detailed phytochemical work for the purpose of isolation of the widest range of AmA. From 34,3 kg of fresh bulbs was obtained 31,7 g of purified alkaloidal extract, which was processed using column chromatography with stepwise elution by light petrol, chloroform and ethanol in different ratios to almost 500 fractions. These fractions were fused into 27 subfractions, which were processed by preparative TLC, vacuum column chromatography and crystallization. Finally, 25 pure alkaloids were isolated. All compounds were identified by GC-MS, ESI-MS, NMR, optical rotation and literature. One compound was identified as a new unpublished alkaloid of lycorine structure type. All alkaloids isolated in sufficient amount were tested for their biological activities associated with Alzheimer's disease (inhibition of...
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Phytochemical study of individual plant species of Bergenia genus
Hendrychová, Helena ; Tůmová, Lenka (advisor) ; Nagy, Milan (referee) ; Šmejkal, Karel (referee)
Charles University in Prague, Faculty of Pharmacy in Hradec Králové Department of Pharmacognosy Candidate: Mgr. Helena Hendrychová Supervisor: doc. PharmDr. Lenka Tůmová, CSc. Title of Doctoral Thesis: Phytochemical study of individual plant species of Bergenia genus Bergenia, native to central Asia, is promising source of medicinal compounds mainly in the system of Chinese and Indian traditional medicine. These species have been used for centuries in therapy of various diseases. They are valued for their ability to dissolve kidney or bladder stones. Bergenia plants are used for therapy of pulmonary diseases and cold. They have demonstrated antioxidant, antibacterial, antiviral, immunostimulant, anti-inflammatory, anticancer, antidiabetic, antitussive, hepatoprotective and diuretic effects. The main aim of this thesis was to determine the content of secondary metabolites (arbutin, total polyphenols, bergenin and anthocyanins) in three taxons of Bergenia genus - Bergenia crassifolia (L.) Fritsch, Bergenia ciliata (Haw.) Sternb. a Bergenia x ornata Stein., to compare their biological activities and to identify the most appropriate kind of Bergenia plants with the greatest potential for use in therapy. Plant hybrid B. x ornata was evaluated on the content of phenolic compounds and biological activity...
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