Davos Life Science Pte Ltd

Singapore, Singapore

Davos Life Science Pte Ltd

Singapore, Singapore
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Li Y.,South China University of Technology | Li Y.,Xiangtan University | Liao X.,South China University of Technology | Chen G.,South China University of Technology | And 2 more authors.
Molecular Biotechnology | Year: 2011

Microcystis viridis lectin (MVL), a sugar-binding protein originally isolated from freshwater blue-green algae Microcystis viridis, has been reported to have potent anti-HIV activity. In this paper, we described the expression and purification of recombinant-MVL (R-MVL) gene in E. coli. The results demonstrated that the R-MVL in shake flask cultures was primarily expressed either in the form of inclusion bodies at 37°C or in the soluble fraction at 23 °C. Secondly, a one-step purification based on nickel-affinity chromatography was employed and 15 mg of highly purified (>95%) R-MVL from 1 l of cell cultures was yielded. The purified R-MVL was then subjected to MALDI-TOF-MS analysis for protein identification. In conclusion, for the first time, the R-MVL was successfully cloned and expressed in E. coli, which is useful for further study and large-scale cost-effective production of MVL protein. © 2010 Springer Science+Business Media, LLC.


Manu K.A.,National University of Singapore | Shanmugam M.K.,National University of Singapore | Ramachandran L.,National University of Singapore | Li F.,National University of Singapore | And 6 more authors.
Clinical Cancer Research | Year: 2012

Purpose: Because of poor prognosis and development of resistance against chemotherapeutic drugs, the existing treatment modalities for gastric cancer are ineffective. Hence, novel agents that are safe and effective are urgently needed. Whether γ-tocotrienol can sensitize gastric cancer to capecitabine in vitro and in a xenograft mouse model was investigated. Experimental Design: The effect of γ-tocotrienol on proliferation of gastric cancer cell lines was examined by mitochondrial dye uptake assay, apoptosis by esterase staining, NF-κB activation by DNA-binding assay, and gene expression by Western blotting. The effect of γ-tocotrienol on the growth and chemosensitization was also examined in subcutaneously implanted tumors in nude mice. Results: γ-Tocotrienol inhibited the proliferation of various gastric cancer cell lines, potentiated the apoptotic effects of capecitabine, inhibited the constitutive activation of NF-κB, and suppressed the NF-κB- regulated expression of COX-2, cyclin D1, Bcl-2, CXCR4, VEGF, and matrix metalloproteinase-9 (MMP-9). In a xenograft model of human gastric cancer in nude mice, we found that administration of γ-to-cotrienol alone (1 mg/kg body weight, intraperitoneally 3 times/wk) significantly suppressed the growth of the tumor and this effect was further enhanced by capecitabine. Both the markers of proliferation index Ki-67 and for microvessel density CD31 were downregulated in tumor tissue by the combination of capecitabine and γ-tocotrienol. As compared with vehicle control, γ-tocotrienol also suppressed the NF-κB activation and the expression of cyclin D1, COX-2, intercellular adhesion molecule-1 (ICAM-1), MMP-9, survivin, Bcl-xL, and XIAP. Conclusions: Overall our results show that γ-tocotrienol can potentiate the effects of capecitabine through suppression of NF-κB-regulated markers of proliferation, invasion, angiogenesis, and metastasis. ©2012 AACR.


Siveen K.S.,National University of Singapore | Ahn K.S.,Kyung Hee University | Ong T.H.,Humphrey Oei Institute of Cancer Research | Shanmugam M.K.,National University of Singapore | And 14 more authors.
Oncotarget | Year: 2014

Angiogenesis is one of the key hallmarks of cancer. In this study, we investigated whether γ-tocotrienol can abrogate angiogenesis-mediated tumor growth in hepatocellular carcinoma (HCC) and if so, through what molecular mechanisms. We observed that γ-tocotrienol inhibited vascular endothelial growth factor (VEGF)-induced migration, invasion, tube formation and viability of HUVECs in vitro. Moreover, γ-tocotrienol reduced the number of capillary sprouts from matrigel embedded rat thoracic aortic ring in a dose-dependent manner. Also, in chick chorioallantoic membrane assay, γ-tocotrienol significantly reduced the blood vessels formation. We further noticed that γ-tocotrienol blocked angiogenesis in an in vivo matrigel plug assay. Furthermore, γ-tocotrienol inhibited VEGF-induced autophosphorylation of VEGFR2 in HUVECs and also suppressed the constitutive activation of AKT/mammalian target of rapamycin (mTOR) signal transduction cascades in HUVECs as well as in HCC cells. Interestingly, γ-tocotrienol was also found to significantly reduce the tumor growth in an orthotopic HCC mouse model and inhibit tumor-induced angiogenesis in HCC patient xenografts through the suppression of various biomarkers of proliferation and angiogenesis. Taken together, our findings strongly suggest that γ-tocotrienol might be a promising anti-angiogenic drug with significant antitumor activity in HCC.


Yap W.N.,Davos Life Science Pte. Ltd. | Zaiden N.,Davos Life Science Pte. Ltd. | Tan Y.L.,Biomedical science Institutes | Ngoh C.P.,National University of Singapore | And 4 more authors.
Cancer Letters | Year: 2010

Gamma-tocotrienol has demonstrated anti-proliferative effect on breast cancer (BCa) cells, but mechanisms involved are largely unknown. This study aimed at deciphering the molecular pathways responsible for its activity. Our results showed that treatment of BCa cells with gamma-tocotrienol resulted in induction of apoptosis as evidenced by activation of pro-caspases, accumulation of sub-G1 cells and DNA fragmentations. Examination of the pro-survival genes revealed that the gamma-tocotrienol-induced cell death was associated with suppression of Id1 and NF-κB through modulation of their upstream regulators (Src, Smad1/5/8, Fak and LOX). Meanwhile, gamma-tocotrienol treatment also resulted in the induction of JNK signaling pathway and inhibition of JNK activity by specific inhibitor partially blocked the effect of gamma-tocotrienol. Furthermore, synergistic effect was observed when cells were co-treated with gamma-tocotrienol and Docetaxel. Interestingly, in cells that treated with gamma-tocotrienol, alpha-tocopherol or β-aminoproprionitrile were found to partially restore Id1 expression. Meanwhile, this restoration of Id1 was found to protect the cells from gamma-tocotrienol induced apoptosis. Consistent outcome was observed in cells ectopically transfected with the Id-1 gene. Our results suggested that the anti-proliferative and chemosensitization effect of gamma-tocotrienol on BCa cells may be mediated through downregulation of Id1 protein. © 2009 Elsevier Ireland Ltd. All rights reserved.


The present invention is directed to a method of treating a dermatological condition or preventing a dermatological condition from occurring or for altering the pigmentation of the skin by administering to a patient a pharmaceutically effective amount of a composition comprising at least one Vitamin E component and at least one additional component different from the Vitamin E component that has anti-tyrosinase activity and/or anti-melanogenesis activity. The present invention is further directed to a pharmaceutical composition comprising at least one Vitamin E component and at least one additional component different from the Vitamin E component that has anti-tyrosinase activity and/or anti-melanogenesis activity.


Trademark
Davos Life Science Pte Ltd | Date: 2012-05-08

Anti-oxidants for use in the manufacture of cosmetics, skin care products, hair care products, dental care products, personal care products, perfumery, vitamins, pharmaceuticals, beverages, food products, and food supplements; chemical additives and chemical preparations for use in the manufacture of beauty care, cosmetics, dental care, facial care, hair care, hair styling, perfumery, personal care, personal hygiene, skin care, sun blocking, sun screening, sun tanning products as well as beverages, vitamins and pharmaceuticals; biological preparations for use in the manufacture of cosmetics, other than for medical or veterinary use; all of the aforesaid goods containing tocotrienols in whole or significant part. Perfumes; sun blocking preparations; sun screening preparations; sun tanning preparations; preparations for beauty care, namely, beauty care cosmetics; preparations for dental care, namely, non-medicated dental rinse, toothpaste; preparations for facial care, namely, face lotions, face creams; hair care preparations; hair styling preparations; preparations for personal care, namely, deodorants for personal use, fragrances for personal use, soaps for personal use; preparations for personal hygiene, namely, personal deodorants; non-medicated skin care preparations; cosmetic oils, cosmetic creams; essential oils; natural essential oils; cosmetic preparations for use in beauty care, dental care, facial care, hair care, hair styling, perfume, personal care, personal hygiene, skin care, sun blocking, sun screening and sun tanning, namely, beauty creams, toothpastes, skin creams, hair creams, perfumes, cosmetic sunscreen preparations; all of the aforesaid goods containing tocotrienols in whole or significant part. Beverages adapted for medical and medicinal purposes, namely, dietetic beverages, nutritionally-fortified beverages; chemicals, chemical preparations, and chemical products for medical and pharmaceutical purposes, namely, chemical reagents; food supplements; medicated supplements for foodstuffs for human consumption; dietetic foods adapted for medical purposes; health food supplements made principally of minerals, vitamins; health food supplements for persons with special dietary requirements; medicated supplements for food for human consumption; medicated creams and preparations for skin care, hair care, facial care, personal care, personal hygiene, and protecting the skin against sun damage; products for dental care, namely, medicated mouth care and treatment preparations; mineral supplements; medicinal natural oils; natural pharmaceutical products, namely, pharmaceuticals for the prevention and treatment of cancer, for treating diabetes, for treating skin disorders; non-prescription dietary supplements for human consumption consisting of vitamins, mineral supplements and anti-oxidants; nutritional supplements; medicinal oils for medical purposes and pharmaceutical purposes; medicated preparations for use as nutritional additives to food for human consumption; pharmaceutical compositions, drugs, preparations, products and substances, namely, pharmaceuticals for the prevention and treatment of cancer, for treating diabetes, for treating skin disorders; vitamin supplements; all of the aforesaid goods containing tocotrienols in whole or significant part. Fruit based and dairy based dietary supplements, other than for medical use, namely, fruit-based snack food, fruit-based spreads, milk-based beverages containing fruit juice, beverages having a milk base; protein-based dairy preparations, namely, milk proteins, dairy-based beverages, dairy-based spreads, protein based, nutrient-dense snack foods; fruit based and dairy based food preparations being dietetic supplements or nutritional additives, not for medical purposes, namely, fruit-based snack food, fruit-based spreads, milk-based beverages containing fruit juice, beverages having a milk base; all of the aforesaid goods containing tocotrienols in whole or significant part. Dental health chewing gum, other than medicated; carbohydrate-based food preparations being dietetic supplements or nutritional additives, not for medical purposes, namely, processed cereals, wheat-based snack foods; dietary supplements, other than for medical use, namely, food flavorings, food seasonings, flavoring additives for non-nutritional purposes, wheat germ; all of the aforesaid goods containing tocotrienols in whole or significant part. Beverages containing added vitamins, minerals, anti-oxidants, proteins, other than for medical use, namely, fruit beverages, water beverages, vegetable juice beverages, aloe juice beverages, fruit-flavored beverages, isotonic beverages, fruit-based beverages, whey beverages; all of the aforesaid goods containing tocotrienols in whole or significant part.


Trademark
Davos Life Science Pte. Ltd. | Date: 2013-01-28

Anti-oxidants for use in the manufacture of cosmetics, skin care products, hair care products, dental care products, personal care products, perfumery, vitamins, pharmaceuticals, beverages, food products, and food supplements; chemical additives and chemical preparations for use in the manufacture of beauty care, cosmetics, dental care, facial care, hair care, hair styling, perfumery, personal care, personal hygiene, skin care, sun blocking, sun screening, sun tanning products as well as beverages, vitamins and pharmaceuticals; biological preparations for use in the manufacture of cosmetics, other than for medical or veterinary use; all of the aforesaid goods containing tocotrienols in whole or significant part. Perfumes; sun blocking preparations; sun screening preparations; sun tanning preparations; preparations for beauty care, namely, beauty care cosmetics; preparations for dental care, namely, non-medicated dental rinse, toothpaste; preparations for facial care, namely, face lotions, face creams; hair care preparations; hair styling preparations; preparations for personal care, namely, deodorants for personal use, fragrances for personal use, soaps for personal use; preparations for personal hygiene, namely, personal deodorants; non-medicated skin care preparations; cosmetic oils, cosmetic creams; essential oils; natural essential oils; cosmetic preparations for use in beauty care, dental care, facial care, hair care, hair styling, perfume, personal care, personal hygiene, skin care, sun blocking, sun screening and sun tanning, namely, beauty creams, toothpastes, skin creams, hair creams, perfumes, cosmetic sunscreen preparations; all of the aforesaid goods containing tocotrienols in whole or significant part. Beverages adapted for medical and medicinal purposes, namely, dietetic beverages, nutritionally-fortified beverages; chemicals, chemical preparations, and chemical products for medical and pharmaceutical purposes, namely, chemical reagents; food supplements; medicated supplements for foodstuffs for human consumption; dietetic foods adapted for medical purposes; health food supplements made principally of minerals, vitamins; health food supplements for persons with special dietary requirements; medicated supplements for food for human consumption; medicated creams and preparations for skin care, hair care, facial care, personal care, personal hygiene, and protecting the skin against sun damage; products for dental care, namely, medicated mouth care and treatment preparations; mineral supplements; medicinal natural oils; natural pharmaceutical products, namely, pharmaceuticals for the prevention and treatment of cancer, for treating diabetes, for treating skin disorders; non-prescription dietary supplements for human consumption consisting of vitamins, mineral supplements and anti-oxidants; nutritional supplements; medicinal oils for medical purposes and pharmaceutical purposes; medicated preparations for use as nutritional additives to food for human consumption; pharmaceutical compositions, drugs, preparations, products and substances, namely, pharmaceuticals for the prevention and treatment of cancer, for treating diabetes, for treating skin disorders; vitamin supplements; all of the aforesaid goods containing tocotrienols in whole or significant part. Fruit based and dairy based dietary supplements, other than for medical use, namely, fruit-based snack food, fruit-based spreads, milk-based beverages containing fruit juice, beverages having a milk base; protein-based dairy preparations, namely, milk proteins, dairy-based beverages, dairy-based spreads, protein based, nutrient-dense snack foods; fruit based and dairy based food preparations being dietetic supplements or nutritional additives, not for medical purposes, namely, fruit-based snack food, fruit-based spreads, milk-based beverages containing fruit juice, beverages having a milk base; all of the aforesaid goods containing tocotrienols in whole or significant part. Dental health chewing gum, other than medicated; carbohydrate-based food preparations being dietetic supplements or nutritional additives, not for medical purposes, namely, processed cereals, wheat-based snack foods; dietary supplements, other than for medical use, namely, food flavorings, food seasonings, flavoring additives for non-nutritional purposes, wheat germ; all of the aforesaid goods containing tocotrienols in whole or significant part. Beverages containing added vitamins, minerals, anti-oxidants, proteins, other than for medical use, namely, fruit beverages, water beverages, vegetable juice beverages, aloe juice beverages, fruit-flavored beverages, isotonic beverages, fruit-based beverages, whey beverages; all of the aforesaid goods containing tocotrienols in whole or significant part.


Trademark
Davos Life Science Pte Ltd | Date: 2010-07-02

Anti-oxidants for use in manufacture; chemical additives, preparations, products, supplements for use in the manufacture of beauty care, cosmetics, dental care, facial care, hair care, hair styling, perfumery, personal care, personal hygiene, skin care, sun blocking, sun screening, sun tanning products as well as beverages, vitamins and pharmaceuticals; biological preparations for use in the manufacture of cosmetics; biological oils, other than essential oils, for use in the manufacture of cosmetics. Oils, creams, essential oils, natural oils, perfumes, preparations for beauty care, dental care, facial care, hair care, hair styling, personal care, personal hygiene, skin care, sun blocking preparations, sun screening preparations and sun tanning preparations; creams, essential oils, natural oils; cosmetic preparations for use in beauty care, dental care, facial care, hair care, hair styling, perfume, personal care, personal hygiene, skin care, sun blocking, sun screening and sun tanning. Beverages adapted for medical purposes, medicinal purposes; chemicals, chemical preparations and chemical products for medical and pharmaceutical purposes; food supplements, foodstuffs, food substances for medical purpose; health food supplements made principally of minerals, vitamins; health food supplements for persons with special dietary requirements; medicated supplements for food; medicated supplements for foodstuffs for human consumption; medicated creams, preparations, products for dental care, facial care, hair care, personal care, personal hygiene, skin care, protection against sun; mineral supplements; natural oils (medicinal); natural pharmaceutical products; non-prescription dietary supplements for human consumption consisting of vitamins, minerals and anti-oxidants; nutritional supplements; oils for medical purposes, medicinal purposes, pharmaceutical purposes; preparations for use as additives to food for human consumption (medicated); pharmaceutical compositions, drugs, preparations, products and substances; pharmaceutical preparations; vitamin supplements. Fruit based and dairy based dietary supplements, other than for medical use; protein-based dairy preparations; fruit based and dairy based food preparations being dietetic supplements or nutritional additives (not for medical purposes). Dental health gum (other than medicated); carbohydrate-based food preparations being dietetic supplements or nutritional additives, not for medical purposes; dietary supplements principally of royal jelly (other than for medical use); cereal-based dietary supplements, not for medical use; confectionary-based dietary supplements, other than for medical use. Beverages containing added vitamins, minerals, anti-oxidants, other than for medical use.


Trademark
Davos Life Science Pte Ltd | Date: 2010-07-02

Anti-oxidants for use in manufacture; chemical additives, preparations, products, supplements for use in the manufacture of beauty care, cosmetics, dental care, facial care, hair care, hair styling, perfumery, personal care, personal hygiene, skin care, sun blocking, sun screening, sun tanning products as well as beverages, vitamins and pharmaceuticals. Components and ingredients used in the manufacture of biological oils, creams, essential oils, natural oils, preparations for products for beauty care, cosmetics, dental care, facial care, hair care, hair styling, perfume, personal care, personal hygiene, skin care, sun blocking, sun screening, sun tanning; biological oils, creams, essential oils, natural oils, preparations for products for beauty care, cosmetics, dental care, facial care, hair care, hair styling, perfume, personal care, personal hygiene, skin care, sun blocking, sun screening, sun tanning. Beverages adapted for medical purposes, medicinal purposes; chemicals, chemical preparations, chemical products for medical science purposes, pharmaceutical purposes; food supplements, foodstuffs, food substances for medical purposes; health food supplements made principally of minerals, vitamins; health food supplements for persons with special dietary requirements; medicated supplements for food; medicated supplements for foodstuffs for human consumption; medicated creams, preparations, products for dental care, facial care, hair care, personal care, personal hygiene, skin care, protection against sun; mineral supplements; natural oils (medicinal); natural pharmaceutical products; non-prescription dietary supplements for human consumption consisting of vitamins, minerals and anti-oxidants; nutritional supplements; oils for medical purposes, medicinal purposes, pharmaceutical purposes; preparations for use as additives to food for human consumption (medicated); pharmaceutical compositions, drugs, preparations, products and substances; pharmaceutical preparations; vitamin supplements. Fruit-based and dairy-based dietary supplements, other than for medical use; protein-based dairy preparations for making beverages; dairy-based food preparations being dietetic supplements or nutritional additives (not for medical purposes). Dental health gum (other than medicated); carbohydrate-based food preparations being dietetic supplements or nutritional additives, not for medical purposes; dietary supplements, other than for medical use. Beverages containing added vitamins, minerals, anti-oxidants, proteins, other than for medical use.


Trademark
Davos Life Science Pte. Ltd. | Date: 2011-05-03

Cosmetic preparations; non-medicated skincare cosmetics; non-medicated skincare preparations for cosmetic use; non-medicated facial skin care products for cosmetic use; facial creams for cosmetic use; facial lotions for cosmetic use; facial masks for cosmetic use; facial skin moisturizers for cosmetic use; facial cosmetic preparations; facial scrubs for cosmetic use; facial skin toners; facial washes for cosmetic use; skin moisturizers for cosmetic use; moisturizing body lotion for cosmetic use; moisturizing creams for cosmetic use; moisturizing gels for cosmetic use; moisturizing lotions for cosmetic use; moisturizing cosmetic preparations; moisturizing skin creams for cosmetic use; moisturizing skin lotions for cosmetic use; oil for cosmetic use; non-medicated grooming preparations for pets and livestock in the nature of cosmetics; shampoos for animals; non-medicated toiletries for the care of the skin of domestic animals; essential oils for use in food. Chemical preparations for pharmaceutical use and pharmaceutical and chemico-pharmaceutical preparations for the treatment of cancer, cardiovascular diseases, inflammatory diseases, and the improvement and maintenance of cellular health; medicated skin care and hair care preparations for pharmaceutical use in the treatment and prevention of skin cancer, inflammatory diseases, and for UV protection; natural pharmaceutical preparations for use in the treatment of cancer, cardiovascular diseases, inflammatory diseases, skin care, hair care, UV protection, and the improvement and maintenance of cellular health; nutritional supplements; vitamin supplements; food supplements for medical purposes; dietetic foods adapted for medical use; medicated nutritional additives for medical purposes for use in foods for human consumption; mineral food-supplements; natural nutritional oils for medical purposes and not for food or cosmetic purposes; oils for pharmaceutical purposes for use in the treatment of cancer, cardiovascular diseases, inflammatory diseases, skin care, hair care, UV protection, and the improvement and maintenance of cellular health; medicated grooming preparations for pets and livestock for use in skin care and hair care for veterinary use; medicated dietary supplements for animals; medicated dietetic foodstuffs for animals for medical use; medicated nutritional additives for animal foodstuffs; medicated supplements for animal foodstuffs; vitamin and mineral premixes, nutritional supplements in the nature of probiotic compositions, and tocotrienols-based pharmaceutical preparations for use to enhance immunity and fertility for animals; preparations consisting of vitamins; vitamins; vitamins, namely, tocotrienols and tocotrienols-based preparations for use in the manufacture of cosmetics.

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