scholarly journals Simultaneous Optimal Production of Flavonol Aglycones and Degalloylated Catechins from Green Tea Using a Multi-Function Food-Grade Enzyme

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 861
Author(s):  
Chan-Su Rha ◽  
Shin-Woo Kim ◽  
Kyoung Hee Byoun ◽  
Yong Deog Hong ◽  
Dae-Ok Kim
Keyword(s):  
Green Tea ◽  
Time Course ◽  
Biological Activities ◽  
Hydrolase Activity ◽  
Enzyme Specificity ◽  
Optimum Conditions ◽  
Enzymatic Process ◽  
Food Grade ◽  
Phytochemical Compounds ◽  
Kaempferol Glycosides

(1) Background: Green tea (GT) contains well-known phytochemical compounds; namely, it is rich in flavan-3-ols (catechins) and flavonols comprising all glycoside forms. These compounds in GT might show better biological activities after a feasible enzymatic process, and the process on an industrial scale should consider enzyme specificity and cost-effectiveness. (2) Methods: In this study, we evaluated the most effective method for the enzymatic conversion of flavonoids from GT extract. One enzyme derived from Aspergillus niger (molecular weight 80–90 kDa) was ultimately selected, showing two distinct but simultaneous activities: intense glycoside hydrolase activity via deglycosylation and weak tannin acyl hydrolase activity via degalloylation. (3) Results: The optimum conditions for producing flavonol aglycones were pH 4.0 and 50 °C. Myricetin glycosides were cleaved 3.7–7.0 times faster than kaempferol glycosides. Flavonol aglycones were produced effectively by both enzymatic and hydrochloride treatment in a time-course reaction. Enzymatic treatment retained 80% (w/w) catechins, whereas 70% (w/w) of catechins disappeared by hydrochloride treatment. (4) Conclusions: This enzymatic process offers an effective method of conditionally producing flavonol aglycones and de-galloylated catechins from conversion of food-grade enzyme.

scholarly journals The Methionine 549 and Leucine 552 Residues of Friedelin Synthase from Maytenus ilicifolia Are Important for Substrate Binding Specificity

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6806
Author(s):  
Bruna F. Mazzeu ◽  
Tatiana M. Souza-Moreira ◽  
Andrew A. Oliveira ◽  
Melissa Remlinger ◽  
Lidiane G. Felippe ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Biological Activities ◽  
Site Directed Mutagenesis ◽  
Directed Mutagenesis ◽  
Enzyme Specificity ◽  
Amino Acid Residues ◽  
Loss Of Function ◽  
Pentacyclic Triterpene ◽  
Oxidosqualene Cyclases ◽  
Maytenus Ilicifolia

Friedelin, a pentacyclic triterpene found in the leaves of the Celastraceae species, demonstrates numerous biological activities and is a precursor of quinonemethide triterpenes, which are promising antitumoral agents. Friedelin is biosynthesized from the cyclization of 2,3-oxidosqualene, involving a series of rearrangements to form a ketone by deprotonation of the hydroxylated intermediate, without the aid of an oxidoreductase enzyme. Mutagenesis studies among oxidosqualene cyclases (OSCs) have demonstrated the influence of amino acid residues on rearrangements during substrate cyclization: loss of catalytic activity, stabilization, rearrangement control or specificity changing. In the present study, friedelin synthase from Maytenus ilicifolia (Celastraceae) was expressed heterologously in Saccharomyces cerevisiae. Site-directed mutagenesis studies were performed by replacing phenylalanine with tryptophan at position 473 (Phe473Trp), methionine with serine at position 549 (Met549Ser) and leucine with phenylalanine at position 552 (Leu552Phe). Mutation Phe473Trp led to a total loss of function; mutants Met549Ser and Leu552Phe interfered with the enzyme specificity leading to enhanced friedelin production, in addition to α-amyrin and β-amyrin. Hence, these data showed that methionine 549 and leucine 552 are important residues for the function of this synthase.

scholarly journals Review on biological activities in medicinal plants of acanthaceae family

2021 ◽  
Vol 12 (1) ◽  
pp. 315-333
Author(s):  
Manjula M ◽  
Sankar D S
Keyword(s):  
Medicinal Plants ◽  
Biological Activities ◽  
Vital Role ◽  
Ethnic Communities ◽  
Alternative And Complementary Medicine ◽  
Strobilanthes Crispus ◽  
Comprehensive Survey ◽  
Clinacanthus Nutans ◽  
Phytochemical Compounds ◽  
Anti Oxidant

Acanthaceae is popularly known as acanthus family which belong to mint order – lamiales. They are distributed from tropics to a temperate region such as India, Malaysia, Brunei, Indonesia, Brazil, Central America and Africa. Most members of this family are therapeutically important since they are in the up to date usage by ethnic communities. Andrographis paniculata, Clinacanthus nutans, Graptophyllum pictum, Hemigraphis alternata, Justicia gendarussa and Strobilanthes Crispus are some of the medicinal plants of Acanthaceae family. These plants are recognized for their biopharmaceutical potential usage in traditional medicine. These plants have a plethora of phytochemical compounds such as flavonoids, phenolic compounds, glycosides, terpenoids, benzenoids, quinine, triterpenoids and naphthoquinone present in various parts of the plant that plays a vital role in drug industries. The pharmacological properties of these plants such as anti-bacterial, anti-diabetic, anti-cancer, anti-oxidant, anti-inflammatory, anti-arthritis, hepatoprotective, anti-viral and anti-hypertensive are in general practice as an alternative and complementary medicine in both ethnobotanical and pharmacological fields. This article encompasses not only the comprehensive survey based on the electronic resources, scientific journals but also the books that summarize the botanical, phytochemical properties of these plants and also accentuate their significant role in both ethnobotanical and pharmacological fields. It is felt that this article would provide more insight into the health benefits of some plants of the Acanthaceae family.

scholarly journals Flavonoids Profile, Taxonomic Data, History of Cosmetic Uses, Anti-Oxidant and Anti-Aging Potential of Alpinia galanga (L.) Willd

Cosmetics ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 89
Author(s):  
Duangjai Tungmunnithum ◽  
Nobuyuki Tanaka ◽  
Ayumi Uehara ◽  
Tsukasa Iwashina
Keyword(s):  
Medicinal Plant ◽  
Biological Activities ◽  
Taxonomic Status ◽  
Raw Material ◽  
Alpinia Galanga ◽  
Long Time ◽  
History Of ◽  
Data History ◽  
Phytochemical Compounds ◽  
Anti Oxidant

Alpinia galanga is a well-known medicinal plant in Southeast Asia and has been used for a long time as food and medicine. A large number of flavonoid phytochemical compounds have been identified in various parts of this medicinal herb. Flavonoids are commonly known as attractive compounds that can be applied to cosmetic or cosmeceutical product development because of their antioxidant, anti-aging and many other potential biological activities. This recent review aims to illustrate and update the taxonomic status as well as the species description that will be helpful for a rigorous identification and authenticate the raw material or living specimen from A. galanga. The flavonoid phytochemical compounds and the bioactivity of this medicinal plant are also provided. The future perspectives and research directions of A. galanga and its flavonoids are pointed out in this study as well.

Effect of Prostaglandin on the Composition of Chinchilla Middle Ear Effusion

1980 ◽  
Vol 89 (3_suppl) ◽  
pp. 153-160 ◽  
Author(s):  
Timothy T. K. Jung ◽  
S. K. Juhn ◽  
Douglas M. Smith ◽  
Jonathan M. Gerrard
Keyword(s):  
Alkaline Phosphatase ◽  
Bone Resorption ◽  
Otitis Media ◽  
Middle Ear ◽  
Time Course ◽  
Unsaturated Fatty Acids ◽  
Biological Activities ◽  
Middle Ear Mucosa ◽  
Acid And Alkaline Phosphatase ◽  
Wide Range

Prostaglandins (PGs) are naturally occurring, cyclic, unsaturated fatty acids which possess a wide range of potent biological activities. PGs have been found in human middle ear effusions and might have implications for understanding the inflammation and possibly the bone resorption seen in chronic otitis media. We have measured PGs by radioimmunoassay in middle ear effusions (MEE) from experimentally induced serous otitis media (SOM) and purulent otitis media (POM) in chinchillas. PGE2 levels were significantly higher in the POM group compared to the SOM group. We have also demonstrated that chinchilla middle ear mucosa can convert arachidonic acid (AA), a precursor of PGs, to PG by injecting 14C-AA into bullae and assaying using radiochromatography. This conversion was completely blocked by both indomethacin and aspirin given orally or by direct injection into the middle ear. We then injected 50 μg of PGE2 into chinchilla bullae to assess its effect on the composition of MEE. First, the time course of PGE2 metabolism after its injection into the middle ear (ME) was determined by thin-layer chromatography (TLC) of labelled and unlabelled PGE2. Following this, serial daily injections of PGE2 and normal saline as control were made for one, three, and seven days. MEE and serum were collected and assayed for lactate dehydrogenase (LDH), acid and alkaline phosphatase, calcium, protein and hexosamine. Compared to the control, the levels of LDH, acid and alkaline phosphatase, calcium and protein were significantly elevated. Hexosamine levels were higher than the control at one and three days but did not differ significantly at seven days from the control. We have therefore demonstrated that chinchilla middle ear mucosa has the ability to synthesize PG from AA and suggest an active role for PGs in the inflammation and in the bone resorption seen in otitis media.

scholarly journals Phytochemical Compounds and Pharmacological Activities of Vitis vinifera L.: An Updated Review

2021 ◽  
Vol 11 (6) ◽  
pp. 13829-13849
Keyword(s):  
Vitis Vinifera ◽  
Wound Care ◽  
Biological Activities ◽  
Vitis Vinifera L ◽  
Pharmacological Activities ◽  
Scientific Databases ◽  
Traditional Uses ◽  
Western Asia ◽  
Phytochemical Compounds ◽  
Nutritional Constituents

Grapes (Vitis vinifera L.) are commonly known grape species that belong to the Vitis genus in the Vitaceae family and come from western Asia and southern Europe. This review consists of traditional uses, phytochemical compounds, nutritional constituents, pharmacological activities, genotoxicological studies, and toxicity studies of V. vinifera. The data were obtained from scientific databases and search engines such as PubMed, Elsevier, Springer, Frontiers, Google Scholar, Scopus, Science Direct, and MDPI. In some countries, grapes used for traditional uses, such as drug therapy for blood-forming, anemia, allergies, wound care, colds and flu, carminative, bronchitis, diarrhea, and anti-phlegm. The main phytochemical compounds in V. vinifera are phenolic compounds, aromatic acids, flavonoids, proanthocyanidins, and stilbenoids. Nutritional constituents can be found in grapevines, i.e., proteins, lipids, carbohydrates, minerals, and vitamins. Parts of the grapevines had a wide variety of biological activities, i.e., antioxidant, antiviral, antiplatelet, antifungal, anticataract, antiobesity, anticholinergic, anti-sunburn, anti-inflammatory, and wound-healing activities. The phytochemical compounds content in each part of the grapevines were different. Each pharmacological activity depends on the grapevine's phytochemical compounds, components used, and extraction type. However, more studies are needed regarding the genotoxicity and toxicity of V. vinifera.

scholarly journals Evaluation of Chemical Properties, Biological Activities and Ethnomedicinal uses of Cladostemon kirkii -

2020 ◽  
Vol 10 (5) ◽  
pp. 190-195
Author(s):  
Alfred Maroyi
Keyword(s):  
Biological Activities ◽  
Chemical Properties ◽  
Journal Articles ◽  
Scientific Publications ◽  
Medicinal Uses ◽  
Sexually Transmitted ◽  
Traditional Medicines ◽  
Online Databases ◽  
Phytochemical Compounds ◽  
Ethnomedicinal Uses

Cladostemon kirkii (Oliv.) Pax & Gilg is a shrub or a small tree widely used as traditional medicine in tropical Africa. This study is aimed at evaluating the chemical properties, biological activities and ethnomedicinal uses of C. kirkii. Results of the current study are based on data derived from several online databases such as Scopus, Google Scholar, PubMed and Science Direct, and pre-electronic sources such as scientific publications, books, dissertations, book chapters and journal articles. The articles published between 1960 and 2019 were used in this study. This study revealed that the bark, leaf, root and stem infusion and/or decoction of C. kirkii are mainly used as traditional medicines for boils, colds, gastro-intestinal problems, hypertension, ophthalmia, rheumatism, sexual dysfunction, abdominal pains, sexually transmitted infections, sores and wounds. Phytochemical compounds identified from the species include mearnsitrin, myricitrin, kaempferol-5-rhamnoside, kaempferin, kaempferol 3-gluco-7-rhamnoside, quercetin 3,7-dirhamnoside, quercetin 3-gluco-7-rhamnoside, choline, 3-hydroxyprolinebetaine and tetramethylammonium. Cladostemon kirkii should be subjected to detailed phytochemical, pharmacological and toxicological evaluations aimed at correlating its medicinal uses with its phytochemistry and pharmacological properties.

scholarly journals Optimisation of Extraction Method and Phytochemical Compounds of Green Christia vespertilionis Leaves using GC-MS

2021 ◽  
Vol 70 (1) ◽  
Author(s):  
Izzah Farhah Zambari ◽  
Sitti Rahma Abdul Hafid ◽  
Nur Airina Muhamad
Keyword(s):  
Extraction Method ◽  
Methyl Acetate ◽  
Biological Activities ◽  
Butyl Ester ◽  
Soxhlet Extraction ◽  
The Public ◽  
Contagious Diseases ◽  
Significant Difference ◽  
Anti Cancer ◽  
Phytochemical Compounds

Christia vespertilionis (L. f.) Bakh. f. has been widely known in treating various contagious diseases. This plant is popular among researchers and locals to have anti-inflammatory, and anti-cancer properties. There are two types of C. vespertilionis which is green and red type. The green C. vespertilionis was extensively studied by many researchers and known by the public as a cure to the cancer. This study was carried out to identify major phytochemicals and optimise extraction method of green C. vespertilionis leaves in different extraction techniques (maceration and Soxhlet extraction) and solvents (methanol and ethanol) through GC-MS analysis. The green C. vespertilionis leaves extract was tested using Gas Chromatography Mass Spectrophotometer (GC-MS). The components were identified by comparing National Institute of Standards and Technology (NIST). Based on four samples which are green C. vespertilionis leaves using maceration of methanol (GMM), maceration of ethanol (GME), Soxhlet of methanol (GSM) and Soxhlet of ethanol (GSE), seventy phytochemical compounds were identified. Thirteen major phytochemical compounds (> 4 % of peak area) are acetic acid, butyl ester; 1-Butanol, 3-methyl-, acetate; 1,3-Diisobutyrin, trimethylsilyl; .alpha.-d-Mannofuranoside, methyl; 1- Tetradecene; 1-Hexadecene; 1-Octadecene; Hexanoic acid, 3-oxo-, ethyl ester; 4-O-Methylmannose; n-Hexadecanoic acid; Phytol; 9,12,15-Octadecatrienoic acid, (Z,Z,Z)- and Squalene. Only ten out of thirteen compounds were reported to have biological activities. Among those samples, GMM and GSM were the most effective using correlation coefficient analysis between peak area (%) versus real time (min) with significant difference at P < 0.001.

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