Carotenoid fractions were extracted from red paprika, Valencia orange peel and the peel of Golden delicious apple. Thus, hypophasic carotenoids of paprika (PM1), orange (PM3) and apple (PM4), and epiphasic extractions of paprika (PM2) and apple (PM5) were obtained by extraction, saponification and partition between MeOH-H2O (9:1) (hypophasic) and hexane (epiphasic). A high content of capsanthin was quantified in hypophasic carotenoids (PM1) from red spice paprika, whereas the hypophasic fractions from orange (PM3) and apple (PM4) were mainly composed of violaxanthin, zeaxanthin and lutein. On the other hand, a high content of PP-carotene and P-cryptoxanthin was found in epiphasic fractions (PM2 and PM5). The extracts were studied for their anti-Helicobacter pylori (H. pylori), anti-human immunodeficiency virus (HIV), cytotoxic, multidrug resistance (MDR) reversal and radical scavenging activity. Among five PM extracts and beta,beta-carotene, PM4 showed potent anti-H. pylori activity (MIC50 = 36 mu g\/mL), comparable to metronidazole (MIC50 = 45 mu g\/mL). The extracts were inactive against HIV. PM3 and PM4 showed slightly higher cytotoxic activity against three human tumor cell lines (squamous cell carcinoma HSC-2, HSC-3, submandibular gland carcinoma HSG) and human promyelocytic leukemic HL-60 cells than against three normal human oral cells (gingival fibroblast HGF, pulp cell HPC, periodontal ligament fibroblast HPLF), suggesting a tumor-specific cytotoxic activity. PM1, PM3 and PM4 displayed much higher MDR-reversing activity than (+\/-)-verapamil. ESR spectroscopy demonstrated that PM1-5 and beta,beta-carotene produced little or no detectable radical under alkaline conditions and did not scavenge the O-2(-) produced by the hypoxanthine and xanthine oxidase reaction. On the other hand, PM1 and PM2 scavenged efficiently 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, whereas singlet oxygen was also quenched efficiently by PM5 and PM2. The data suggest the potential importance of carotenoids as possible anti-H. pylori and MDR reversal agents. The active principles in the carotenoid extract might differ, depending upon the types of fruits and vegetables.<\/p>\n","protected":false},"template":"","mots_cles":[],"class_list":["post-49919","resume","type-resume","status-publish","hentry"],"acf":{"adresse":"Addresses: Kawase M (reprint author), Josai Univ, Fac Pharmaceut Sci, 1-1 Keyakidai, Sakado, Saitama 3500295 Japan\r\nJosai Univ, Fac Pharmaceut Sci, Sakado, Saitama 3500295 Japan\r\nUniv Pecs, Sch Med, Dept Biochem & Med Chem, H-7901 Pecs Hungary\r\nShowa Univ, Sch Med, Shinagawa Ku, Tokyo 1428555 Japan\r\nMeikai Univ, Sch Dent, Dept Diagnost & Therapeut Sci, Div Pharmacol, Sakado, Saitama 3500283 Japan\r\nSt Marianna Univ, Sch Med, Dept Microbiol, Miyamae Ku, Kawasaki, Kanagawa 2168511 Japan\r\nMeiji Pharmaceut Univ, Tokyo 2048588 Japan\r\nUniv Szeged, Fac Med, Inst Med Microbiol, Albert Szent Gyorgyi Med Ctr, H-6720 Szeged Hungary \r\nE-mail Addresses: kawasema@josai.ac.jp 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