- Hepatoprotective, cytotoxic, antimicrobial and antioxidant activities of Dioon spinulosum leaves Dyer Ex Eichler and its isolated secondary metabolites
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Given the lack of adequate research on Dioon spinulosum (D. spinulosum) Dyer Ex Eichler, this study was conducted focusing on different biological activities and phytochemical investigation of D. spinulosum for the first time. D. spinulosum showed strong
- Abo El-Seoud, Kamilia A.,El-Aasr, Mona,Kabbash, Amal,Kassab, Amira A.,Negm, Walaa A.
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- Isolation of tyrosinase and melanogenesis inhibitory flavonoids from Juniperus chinensis fruits
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A new biflavonoid, amentoflavone-7-O-β-D-glucoside, and thirteen known flavonoids were isolated from the fruits of Juniperus chinensis using a bioactivity-guided method and their tyrosinase inhibitory effects were tested using a mushroom tyrosinase bioassay. Two isolates, hypolaetin-7-O-β-D-glucoside and quercetin-7-O-α-L-rhamnoside, were found to reduce tyrosinase activity at a concentration of 50 μM. Quercetin-7-O-α-L-rhamnoside attenuated cellular tyrosinase activity and melanogenesis in α-MSH plus IBMX-stimulated B16F10 melanoma cells. Molecular docking simulation revealed that quercetin-7-O-α-L-rhamnoside inhibits tyrosinase activity by hydrogen bonding with residues His85, His244, Thr261, and Gly281 of tyrosinase.
- Park, Sang-a,Jegal, Jonghwan,Chung, Ki Wung,Jung, Hee Jin,Noh, Sang Gyun,Chung, Hae Young,Ahn, Jongmin,Kim, Jinwoong,Yang, Min Hye
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- COMPOUNDS, COMPOSITION AND USES THEREOF FOR TREATING CANCER
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The present invention relates to the fields of medicine and cancer treatment. The invention more specifically relates to new compounds which are typically for use as a medicament. In particular, the invention relates to the use of these new compounds for increasing the presentation, typically the production and presentation, of Pioneer Translation Products (PTPs)-derived antigens by cancer cells in a subject, and inducing or stimulating an immune response in the subject. The present disclosure also relates to uses of such compounds, in particular to prepare a pharmaceutical composition and/or to allow or improve the efficiency of a cancer therapy in a subject in need thereof. The invention also discloses methods for preventing or treating cancer, cancer metastasis and/or cancer recurrence in a subject. The present invention in addition provides kits suitable for preparing a composition according to the present invention and/or for implementing the herein described methods.
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(2018/11/22)
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- Biflavanoids and derivatives thereof as antiviral agents
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Substantially purified antiviral biflavanoids robustaflavone, hinokiflavone, amentoflavone, agathisflavone, volkensiflavone, morelloflavone, rhusflavanone, succedaneaflavanone, GB-1a, and GB-2a are provided. Antiviral biflavanoid derivatives and salt forms thereof, e.g., robustaflavone tetrasulfate potassium salt, and methods for preparing the same are also disclosed. Pharmaceutical compositions which include the antiviral biflavanoids, derivatives or salts thereof are also provided alone or in combination with at least one antiviral agent such as 3TC. Also disclosed is an improved method for obtaining substantially pure robustaflavone from plant material. The biflavanoid compounds, derivatives or salts thereof of the invention may be used in a method for treating and/or preventing viral infections caused by viral agents such as influenza, e.g., influenza A and B; hepatitis, e.g., hepatitis B; human immunodeficiency virus, e.g., HIV-1; Herpes viruses (HSV-1 and HSV-2); Varicella Zoster virus (VZV); and measles. For instance, semi-synthetic hexa-O-acetate and hexa-O-methyl ether derivatives of robustaflavone have been found to be effective in a method for treating or preventing hepatitis B viral infections. Compositions which include these robustaflavone derivatives along with methods for preparing and using the same are also provided. These compositions may be used alone or in combination with at least one antiviral agent such as 3TC.
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- A Biflavanone from the Nuts of Semecarpus kurzii
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2,3,2'',3''-Tetrahydroamentoflavone (I), a rare biflavanone has been isolated from the nuts of Semecarpus kurzii.
- Ahmad, Iqbal,Khwaja, Ishratullah,Ilyas, M.,Rahman, W.
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