title: Cytotoxic and antioxidant activities of diterpenes and sterols from the Vietnamese soft coral Lobophytum compactum.
abstract: Two new diterpenes, lobocompactols A (1) and B (2), and five known compounds (3-7) were isolated from the methanol extract of the soft coral Lobophytum compactum using combined chromatographic methods and identified based on NMR and MS data. Each compound was evaluated for cytotoxic activity against A549 (lung) and HL-60 (acute promyelocytic leukemia) human cancer cell lines. Among them, compound 5 exhibited strong cytotoxic activity against the A549 cell line with an IC(50) of 4.97 ± 0.06 μM. Compounds 3, 4, and 7 showed moderate activity with IC(50) values of 23.03 ± 0.76, 31.13 ± 0.08, and 36.45 ± 0.01 μM, respectively. The cytotoxicity of 5 on the A549 cells was comparable to that of the positive control, mitoxantrone (MX). All compounds exhibited moderate cytotoxicity against the HL-60 cell line, with IC(50) values ranging from 17.80 ± 1.43 to 59.06 ± 2.31 μM. Their antioxidant activity was also measured using oxygen radical absorbance capacity method, compounds 1 and 2 exhibiting moderate peroxyl radical scavenging activity of 1.4 and 1.3 μM Trolox equivalents, respectively, at a concentration of 5 μM.
authors.affiliation: Institute of Marine Biochemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Caugiay, Hanoi, Viet Nam. cvminh@vast.ac.vn
authors.forename: Van Minh
authors.initials: VM
authors.lastname: Chau
authors.forename: Van Kiem
authors.initials: VK
authors.lastname: Phan
authors.forename: Xuan  Nhiem
authors.initials: X
authors.lastname: Nguyen
authors.forename: Xuan Cuong
authors.initials: XC
authors.lastname: Nguyen
authors.forename: Phuong Thao
authors.initials: PT
authors.lastname: Nguyen
authors.forename: Hoai Nam
authors.initials: HN
authors.lastname: Nguyen
authors.forename: Le Tuan Anh
authors.initials: le TA
authors.lastname: Hoang
authors.forename: Cong Thung
authors.initials: CT
authors.lastname: Do
authors.forename: Dinh Thi Thu
authors.initials: DT
authors.lastname: Thuy
authors.forename: Hee-Kyoung
authors.initials: HK
authors.lastname: Kang
authors.forename: Hae-Dong
authors.initials: HD
authors.lastname: Jang
authors.forename: Young Ho
authors.initials: YH
authors.lastname: Kim
mesh_terms: D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D045744:Cell Line, Tumor; D004224:Diterpenes / Q000302:isolation & purification / Q000494:pharmacology*; D006801:Humans; D020128:Inhibitory Concentration 50; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008958:Models, Molecular; D013261:Sterols / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D004224:Diterpenes; D013261:Sterols