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      Terpenoids as Potential Geroprotectors

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          Abstract

          Terpenes and terpenoids are the largest groups of plant secondary metabolites. However, unlike polyphenols, they are rarely associated with geroprotective properties. Here we evaluated the conformity of the biological effects of terpenoids with the criteria of geroprotectors, including primary criteria (lifespan-extending effects in model organisms, improvement of aging biomarkers, low toxicity, minimal adverse effects, improvement of the quality of life) and secondary criteria (evolutionarily conserved mechanisms of action, reproducibility of the effects on different models, prevention of age-associated diseases, increasing of stress-resistance). The number of substances that demonstrate the greatest compliance with both primary and secondary criteria of geroprotectors were found among different classes of terpenoids. Thus, terpenoids are an underestimated source of potential geroprotectors that can effectively influence the mechanisms of aging and age-related diseases.

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          Techniques for extraction of bioactive compounds from plant materials: A review

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            Anti-inflammatory compounds parthenolide and Bay 11-7082 are direct inhibitors of the inflammasome.

            Activation of the inflammasome generates the pro-inflammatory cytokines interleukin-1 beta and -18, which are important mediators of inflammation. Abnormal activation of the inflammasome leads to many inflammatory diseases, including gout, silicosis, neurodegeneration, and genetically inherited periodic fever syndromes. Therefore, identification of small molecule inhibitors that target the inflammasome is an important step toward developing effective therapeutics for the treatment of inflammation. Here, we show that the herbal NF-kappaB inhibitory compound parthenolide inhibits the activity of multiple inflammasomes in macrophages by directly inhibiting the protease activity of caspase-1. Additional investigations of other NF-kappaB inhibitors revealed that the synthetic I kappaB kinase-beta inhibitor Bay 11-7082 and structurally related vinyl sulfone compounds selectively inhibit NLRP3 inflammasome activity in macrophages independent of their inhibitory effect on NF-kappaB activity. In vitro assays of the effect of parthenolide and Bay 11-7082 on the ATPase activity of NLRP3 demonstrated that both compounds inhibit the ATPase activity of NLRP3, suggesting that the inhibitory effect of these compounds on inflammasome activity could be mediated in part through their effect on the ATPase activity of NLRP3. Our results thus elucidate the molecular mechanism for the therapeutic anti-inflammatory activity of parthenolide and identify vinyl sulfones as a new class of potential therapeutics that target the NLRP3 inflammasome.
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              Ginseng compounds: an update on their molecular mechanisms and medical applications.

              Ginseng is one of the most widely used herbal medicines and is reported to have a wide range of therapeutic and pharmacological applications. Ginsenosides, the major pharmacologically active ingredients of ginseng, appear to be responsible for most of the activities of ginseng including vasorelaxation, antioxidation, anti-inflammation and anti-cancer. Approximately 40 ginsenoside compounds have been identified. Researchers now focus on using purified individual ginsenoside to reveal the specific mechanism of functions of ginseng instead of using whole ginseng root extracts. Individual ginsenosides may have different effects in pharmacology and mechanisms due to their different chemical structures. Among them the most commonly studied ginsenosides are Rb1, Rg1, Rg3, Re, Rd and Rh1. The molecular mechanisms and medical applications of ginsenosides have attracted much attention and hundreds of papers have been published in the last few years. The general purpose of this update is to provide information of recently described effects of ginsenosides on antioxidation, vascular system, signal transduction pathways and interaction with receptors. Their therapeutic applications in animal models and humans as well as the pharmacokinetics and toxicity of ginsenosides are also discussed in this review. This review concludes with some thoughts for future directions in the further development of ginseng compounds as effective therapeutic agents.
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                Author and article information

                Journal
                Antioxidants (Basel)
                Antioxidants (Basel)
                antioxidants
                Antioxidants
                MDPI
                2076-3921
                17 June 2020
                June 2020
                : 9
                : 6
                : 529
                Affiliations
                [1 ]Laboratory of Geroprotective and Radioprotective Technologies, Institute of Biology, Komi Science Centre, Ural Branch, Russian Academy of Sciences, 28 Kommunisticheskaya st., 167982 Syktyvkar, Russia; kateplus@ 123456mail.ru (E.P.); sergius-plusnin@ 123456yandex.ru (S.P.); yanat-b@ 123456mail.ru (T.B.); ekaterinalashmanova@ 123456yandex.ru (E.L.); lyubov.schilova@ 123456yandex.ru (L.K.); platonova.e.u@ 123456ib.komisc.ru (E.P.); shaposhnikov@ 123456ib.komisc.ru (M.S.)
                [2 ]Pitirim Sorokin Syktyvkar State University, 55 Oktyabrsky Prosp., 167001 Syktyvkar, Russia
                [3 ]Initium-Pharm, LTD, 142000 Moscow, Russia; fmaganova@ 123456gmail.com
                Author notes
                [* ]Correspondence: amoskalev@ 123456ib.komisc.ru ; Tel.: +7-8212-312-894
                Author information
                https://orcid.org/0000-0003-4558-1796
                https://orcid.org/0000-0002-9342-152X
                https://orcid.org/0000-0002-3248-1633
                Article
                antioxidants-09-00529
                10.3390/antiox9060529
                7346221
                32560451
                ed101ad2-4358-4609-ac22-ea3feedbeaa2
                © 2020 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 22 May 2020
                : 14 June 2020
                Categories
                Review

                terpenoids,carotenoids,antioxidants,aging,lifespan,geroprotectors

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