scholarly journals Antifungal and Larvicidal Activities of Phlorotannins from Brown Seaweeds

Marine Drugs ◽  
2021 ◽  
Vol 19 (4) ◽  
pp. 223
Author(s):  
Bertoka Fajar Surya Perwira Negara ◽  
Jae Hak Sohn ◽  
Jin-Soo Kim ◽  
Jae-Suk Choi
Keyword(s):  
Biological Activities ◽  
Marine Invertebrate ◽  
Companion Animals ◽  
Chemical Properties ◽  
Structural Diversity ◽  
Parasitic Infections ◽  
Brown Seaweeds ◽  
Online Databases ◽  
Potential Applications ◽  
Larvicidal Activities

Phlorotannins are secondary metabolites produced by brown seaweeds with antiviral, antibacterial, antifungal, and larvicidal activities. Phlorotannins’ structures are formed by dibenzodioxin, ether and phenyl, ether, or phenyl linkages. The polymerization of phlorotannins is used to classify and characterize. The structural diversity of phlorotannins grows as polymerization increases. They have been characterized extensively with respect to chemical properties and functionality. However, review papers of the biological activities of phlorotannins have focused on their antibacterial and antiviral effects, and reviews of their broad antifungal and larvicidal effects are lacking. Accordingly, evidence for the effectiveness of phlorotannins as antifungal and larvicidal agents is discussed in this review. Online databases (ScienceDirect, PubMed, MEDLINE, and Web of Science) were used to identify relevant articles. In total, 11 articles were retrieved after duplicates were removed and exclusion criteria were applied. Phlorotannins from brown seaweeds show antifungal activity against dermal and plant fungi, and larvicidal activity against mosquitos and marine invertebrate larvae. However, further studies of the biological activity of phlorotannins against fungal and parasitic infections in aquaculture fish, livestock, and companion animals are needed for systematic analyses of their effectiveness. The research described in this review emphasizes the potential applications of phlorotannins as pharmaceutical, functional food, pesticide, and antifouling agents.

scholarly journals Effects of Phlorotannins on Organisms: Focus on the Safety, Toxicity, and Availability of Phlorotannins

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 452 ◽  
Author(s):  
Bertoka Fajar Surya Perwira Negara ◽  
Jae Hak Sohn ◽  
Jin-Soo Kim ◽  
Jae-Suk Choi
Keyword(s):  
Biological Activities ◽  
Companion Animals ◽  
Chemical Characterization ◽  
Anticancer Activities ◽  
Systematic Analysis ◽  
Brown Seaweeds ◽  
Molecular Weights ◽  
Online Databases ◽  
Low Toxicity ◽  
Safety And Toxicity

Phlorotannins are polyphenolic compounds produced via polymerization of phloroglucinol, and these compounds have varying molecular weights (up to 650 kDa). Brown seaweeds are rich in phlorotannins compounds possessing various biological activities, including algicidal, antioxidant, anti-inflammatory, antidiabetic, and anticancer activities. Many review papers on the chemical characterization and quantification of phlorotannins and their functionality have been published to date. However, although studies on the safety and toxicity of these phlorotannins have been conducted, there have been no articles reviewing this topic. In this review, the safety and toxicity of phlorotannins in different organisms are discussed. Online databases (Science Direct, PubMed, MEDLINE, and Web of Science) were searched, yielding 106 results. Following removal of duplicates and application of the exclusion criteria, 34 articles were reviewed. Phlorotannins from brown seaweeds showed low toxicity in cell lines, invertebrates, microalgae, seaweeds, plants, animals (fish, mice, rats, and dogs), and humans. However, the safety and toxicity of phlorotannins in aquaculture fish, livestock, and companion animals are limited. Further studies in these organisms are necessary to carry out a systematic analysis of the safety and toxicity of phlorotannins and to further identify the potential of phlorotannins as functional foods, feeds, and pharmaceuticals.

scholarly journals The Brown Seaweeds of Scotland, Their Importance and Applications

Environments ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 59
Author(s):  
Omar Al-Dulaimi ◽  
Mostafa E. Rateb ◽  
Andrew S. Hursthouse ◽  
Gary Thomson ◽  
Mohammed Yaseen
Keyword(s):  
Waste Treatment ◽  
Biological Activities ◽  
Chemical Diversity ◽  
Great Opportunity ◽  
Brown Seaweeds ◽  
Extraction And Separation ◽  
The Status ◽  
Potential Applications ◽  
The Uk ◽  
Phytochemical Profiles

More than 50% of the UK coastline is situated in Scotland under legislative jurisdiction; therefore, there is a great opportunity for regionally focused economic development by the rational use of sustainable marine bio-sources. We review the importance of seaweeds in general, and more specifically, wrack brown seaweeds which are washed from the sea and accumulated in the wrack zone and their economic impact. Rules and regulations governing the harvesting of seaweed, potential sites for harvesting, along with the status of industrial application are discussed. We describe extraction and separation methods of natural products from these seaweeds along with their phytochemical profiles. Many potential applications for these derivatives exist in agriculture, energy, nutrition, biomaterials, waste treatment (composting), pharmaceuticals, cosmetics and other applications. The chemical diversity of the natural compounds present in these seaweeds is an opportunity to further investigate a range of chemical scaffolds, evaluate their biological activities, and develop them for better pharmaceutical or biotechnological applications. The key message is the significant opportunity for the development of high value products from a seaweed processing industry in Scotland, based on a sustainable resource, and locally regulated.

scholarly journals Recent Findings in Azaphilone Pigments

2021 ◽  
Vol 7 (7) ◽  
pp. 541
Author(s):  
Lúcia P. S. Pimenta ◽  
Dhionne C. Gomes ◽  
Patrícia G. Cardoso ◽  
Jacqueline A. Takahashi
Keyword(s):  
Water Solubility ◽  
Biological Activities ◽  
Low Cost ◽  
Scale Up ◽  
Structural Diversity ◽  
Downstream Processing ◽  
Global Market ◽  
Yield Improvement ◽  
Potential Applications ◽  
New Compounds

Filamentous fungi are known to biosynthesize an extraordinary range of azaphilones pigments with structural diversity and advantages over vegetal-derived colored natural products such agile and simple cultivation in the lab, acceptance of low-cost substrates, speed yield improvement, and ease of downstream processing. Modern genetic engineering allows industrial production, providing pigments with higher thermostability, water-solubility, and promising bioactivities combined with ecological functions. This review, covering the literature from 2020 onwards, focuses on the state-of-the-art of azaphilone dyes, the global market scenario, new compounds isolated in the period with respective biological activities, and biosynthetic pathways. Furthermore, we discussed the innovations of azaphilone cultivation and extraction techniques, as well as in yield improvement and scale-up. Potential applications in the food, cosmetic, pharmaceutical, and textile industries were also explored.

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 Trends in a natural product fucoxanthin

2021 ◽  
Vol 38 (1) ◽  
pp. 117-124
Author(s):  
Bahar Aslanbay Güler ◽  
Esra İmamoğlu
Keyword(s):  
Chlorophyll A ◽  
Review Paper ◽  
Biological Activities ◽  
Biological Effects ◽  
Brown Seaweeds ◽  
System Protection ◽  
Potential Applications ◽  
Food And Feed ◽  
Development Characteristic ◽  
C Complex

Fucoxanthin is a xanthophyll pigment which occurs in marine brown seaweeds (macroalgae), diatoms and several microalgae species. It forms with chlorophyll a-c and several proteins, a major fucoxanthin-chlorophyll a/c complex, which transfers light energy to the photosynthesis center and plays a major role in light harvesting. Recent studies have reported that fucoxanthin has many physiological functions and biological effects, such as anti-obesity, antidiabetic, anti-inflammatory, anticancer and cardiovascular system protection. Therefore, this pigment is highly preferred for the prevention and treatment of various chronic diseases. In addition, potential applications of high value fucoxanthin can be found in cosmetic, food and feed industries. In this review paper, the historical development, characteristic properties and possible sources of fucoxanthin are extensively described. The potential biological activities of fucoxanthin are also discussed. Finally, brief overview of common applications and market analysis of commercial fucoxanthin are also reported.

scholarly journals Structural Revisions in Natural Ellagitannins

Molecules ◽  
2018 ◽  
Vol 23 (8) ◽  
pp. 1901 ◽  
Author(s):  
Hidetoshi Yamada ◽  
Shinnosuke Wakamori ◽  
Tsukasa Hirokane ◽  
Kazutada Ikeuchi ◽  
Shintaro Matsumoto
Keyword(s):  
Phenolic Compounds ◽  
Biological Activities ◽  
Structural Diversity ◽  
Structural Features ◽  
Complex Structures ◽  
Structural Determination ◽  
Major Focus ◽  
Chebulagic Acid ◽  
Potential Applications

Ellagitannins are literally a class of tannins. Triggered by the oxidation of the phenolic parts on β-pentagalloyl-d-glucose, ellagitannins are generated through various structural conversions, such as the coupling of the phenolic parts, oxidation to highly complex structures, and the formation of dimer and lager analogs, which expand the structural diversity. To date, more than 1000 natural ellagitannins have been identified. Since these phenolic compounds exhibit a variety of biological activities, ellagitannins have potential applications in medicine and health enhancement. Within the context of identifying suitable applications, considerations need to be based on correct structural features. This review describes the structural revisions of 32 natural ellagitannins, namely alnusiin; alnusnin A and B; castalagin; castalin; casuarinin; cercidinin A and B; chebulagic acid; chebulinic acid; corilagin; geraniin; isoterchebin; nobotanin B, C, E, G, H, I, J, and K; punicalagin; punicalin; punigluconin; roxbin B; sanguiin H-2, H-3, and H-6; stachyurin; terchebin; vescalagin; and vescalin. The major focus is on the outline of the initial structural determination, on the processes to find the errors in the structure, and on the methods for the revision of the structure.

Vitex Diterpenoids: Structural Diversity and Pharmacological Activity

2020 ◽  
Vol 26 (1) ◽  
pp. 138-159 ◽  
Author(s):  
Yanfei Ban ◽  
Tianshuang Xia ◽  
Rui Jing ◽  
Yaoli Guo ◽  
Yiya Geng ◽  
...  
Keyword(s):  
Pharmacological Activity ◽  
Hormone Level ◽  
Biological Activities ◽  
Folk Medicine ◽  
Structural Diversity ◽  
Pharmacological Activities ◽  
Structure Activity ◽  
Wide Range ◽  
Potential Applications

Plants of the genus Vitex (Verbenaceae) are mainly distributed throughout tropical and temperate regions, and many Vitex plants have been traditionally used in folk medicine. Plants of this genus are a rich source of diterpenoids, which not only displayed versatile structural diversity with potential chemotaxonomical significance but also exhibited a wide range of biological activities, mainly including in vitro cytotoxic, antiinflammatory, antimicrobial, hormone level-regulating and antiangiogenic activities. Recently, a series of bioactive diterpenoids, with interesting carbon skeletons, have been reported and gathered considerable interest. This article systematically reviewed diterpenoids isolated from the genus Vitex that appeared in the literature up to December 2018, critically highlighting their structural diversity and pharmacological activities. Up to now, a total of 154 diterpenoids with diverse structures have been isolated and identified from Vitex plants. The authors also summarized the reported structure-activity relationships of those well explored Vitex diterpenoids. Finally, the authors discussed the challenges and potential applications of these diterpenoids in the future.

Natural Sesquiterpene Lactones in the Prevention and Treatment of Inflammatory Disorders and cancer: A Systematic Study of this Emerging Therapeutic Approach based on Chemical and Pharmacological Aspect

2020 ◽  
Vol 17 (9) ◽  
pp. 1102-1116
Author(s):  
Sudip Kumar Mandal ◽  
Utsab Debnath ◽  
Amresh Kumar ◽  
Sabu Thomas ◽  
Subhash Chandra Mandal ◽  
...  
Keyword(s):  
Drug Discovery ◽  
Biological Activities ◽  
Sesquiterpene Lactones ◽  
Structural Diversity ◽  
Cancer Drug ◽  
Cancer Drug Discovery ◽  
Anti Cancer ◽  
Drug Discovery Program ◽  
Anti Inflammatory ◽  
Family Based

Background and Introduction: Sesquiterpene lactones are a class of secondary metabolite that contains sesquiterpenoids and lactone ring as pharmacophore moiety. A large group of bioactive secondary metabolites such as phytopharmaceuticals belong to this category. From the Asteraceae family-based medicinal plants, more than 5,000 sesquiterpene lactones have been reported so far. Sesquiterpene lactone-based pharmacophore moieties hold promise for broad-spectrum biological activities against cancer, inflammation, parasitic, bacterial, fungal, viral infection and other functional disorders. Moreover, these moiety based phytocompounds have been highlighted with a new dimension in the natural drug discovery program worldwide after the 2015 Medicine Nobel Prize achieved by the Artemisinin researchers. Objective: These bitter substances often contain an α, β-unsaturated-γ-lactone as a major structural backbone, which in recent studies has been explored to be associated with anti-tumor, cytotoxic, and anti-inflammatory action. Recently, the use of sesquiterpene lactones as phytomedicine has been increased. This study will review the prospect of sesquiterpene lactones against inflammation and cancer. Methods: Hence, we emphasized on the different features of this moiety by incorporating its structural diversity on biological activities to explore structure-activity relationships (SAR) against inflammation and cancer. Results: How the dual mode of action such as anti-inflammatory and anti-cancer has been exhibitedby these phytopharmaceuticals will be forecasted in this study. Furthermore, the correlation of anti-inflammatory and anti-cancer activity executed by the sesquiterpene lactones for fruitful phytotherapy will also be revealed in the present review in the milieu of pharmacophore activity relation and pharmacodynamics study as well. Conclusion: So, these metabolites are paramount in phytopharmacological aspects. The present discussion on the future prospect of this moiety based on the reported literature could be a guide for anti-inflammatory and anti-cancer drug discovery programs for the upcoming researchers.

scholarly journals Natural Molecules and Neuroprotection: Kynurenic Acid, Pantethine and α-Lipoic Acid

2021 ◽  
Vol 22 (1) ◽  
pp. 403
Author(s):  
Fanni Tóth ◽  
Edina Katalin Cseh ◽  
László Vécsei
Keyword(s):  
Neurodegenerative Diseases ◽  
Lipoic Acid ◽  
Kynurenic Acid ◽  
Biological Activities ◽  
Neuroprotective Effect ◽  
Structural Diversity ◽  
Kynurenine Pathway ◽  
Glutamate Excitotoxicity ◽  
Neuroprotective Agents ◽  
Starting Point

The incidence of neurodegenerative diseases has increased greatly worldwide due to the rise in life expectancy. In spite of notable development in the understanding of these disorders, there has been limited success in the development of neuroprotective agents that can slow the progression of the disease and prevent neuronal death. Some natural products and molecules are very promising neuroprotective agents because of their structural diversity and wide variety of biological activities. In addition to their neuroprotective effect, they are known for their antioxidant, anti-inflammatory and antiapoptotic effects and often serve as a starting point for drug discovery. In this review, the following natural molecules are discussed: firstly, kynurenic acid, the main neuroprotective agent formed via the kynurenine pathway of tryptophan metabolism, as it is known mainly for its role in glutamate excitotoxicity, secondly, the dietary supplement pantethine, that is many sided, well tolerated and safe, and the third molecule, α-lipoic acid is a universal antioxidant. As a conclusion, because of their beneficial properties, these molecules are potential candidates for neuroprotective therapies suitable in managing neurodegenerative diseases.

scholarly journals Lignans of Sesame (Sesamum indicum L.): A Comprehensive Review

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 883
Author(s):  
Mebeaselassie Andargie ◽  
Maria Vinas ◽  
Anna Rathgeb ◽  
Evelyn Möller ◽  
Petr Karlovsky
Keyword(s):  
Biological Activities ◽  
Chemical Properties ◽  
Transformation Products ◽  
Extensive Literature ◽  
Controversial Issues ◽  
Sesame Seeds ◽  
Historical Texts ◽  
Health Promoting ◽  
Processed Products

Major lignans of sesame sesamin and sesamolin are benzodioxol--substituted furofurans. Sesamol, sesaminol, its epimers, and episesamin are transformation products found in processed products. Synthetic routes to all lignans are known but only sesamol is synthesized industrially. Biosynthesis of furofuran lignans begins with the dimerization of coniferyl alcohol, followed by the formation of dioxoles, oxidation, and glycosylation. Most genes of the lignan pathway in sesame have been identified but the inheritance of lignan content is poorly understood. Health-promoting properties make lignans attractive components of functional food. Lignans enhance the efficiency of insecticides and possess antifeedant activity, but their biological function in plants remains hypothetical. In this work, extensive literature including historical texts is reviewed, controversial issues are critically examined, and errors perpetuated in literature are corrected. The following aspects are covered: chemical properties and transformations of lignans; analysis, purification, and total synthesis; occurrence in Seseamum indicum and related plants; biosynthesis and genetics; biological activities; health-promoting properties; and biological functions. Finally, the improvement of lignan content in sesame seeds by breeding and biotechnology and the potential of hairy roots for manufacturing lignans in vitro are outlined.

Sign in / Sign up

Export Citation Format

Share Document