TY - JOUR
T1 - Determinations of dioxinlike activity in selected mollusks from the coast of the Bohai Sea, China, using the H4IIE-luc bioassay
AU - Song, Maoyong
AU - Xu, Yan
AU - Jiang, Qinting
AU - Lam, Paul K.S.
AU - O'Toole, Desmond K.
AU - Giesy, John P.
AU - Jiang, Guibin
N1 - Funding Information:
This study was supported by a Central Allocation Grant (8730020) awarded by the Research Grants Council, Hong Kong, and the Area of Excellence Scheme under the University Grants Committee of the Hong Kong Special Administration Region, China (Project AoE/P-04/2004).
PY - 2007/5
Y1 - 2007/5
N2 - Extracts of mollusks collected from eight cities along the coast of the Bohai Sea, China, were used to determine dioxinlike activity using an in vitro bioassay approach. Dioxinlike activity of total extracts was detected by measuring luciferase activity in a stable transfected rat hepatoma cell line, H4IIE, containing an aryl hydrocarbon receptor (AhR)-responsive element linked to a luciferase reporter gene. Luciferase activity was expressed as a percentage of the maximum response observed for 2,3,7,8-TCDD (% TCDDmax). All mollusk samples elicited significant dioxinlike activity except those from Dalian (N1). The greatest magnitudes (±SD, data ex N1) of activity observed for these extracts ranged from 4.88±0.48% to 11.38±1.43% TCDDmax. The mean activity was 7.37±1.85% TCDDmax. Concentrations of TCDD-EQs in mollusk extracts were from 227.4 to 547.5 pg g-1 lipid. The cytotoxic effect of the mollusk extracts on cells was assessed at the same time. Six of the mollusk extracts (N2, N3, N4, S1, S2, and S4) caused noticeable growth inhibition over the exposure period at concentrations higher than 0.33% of the extracts concentrations (0.83 μL extract well-1). All the dilutions of sample N1 were cytotoxic to the H4IIE cells.
AB - Extracts of mollusks collected from eight cities along the coast of the Bohai Sea, China, were used to determine dioxinlike activity using an in vitro bioassay approach. Dioxinlike activity of total extracts was detected by measuring luciferase activity in a stable transfected rat hepatoma cell line, H4IIE, containing an aryl hydrocarbon receptor (AhR)-responsive element linked to a luciferase reporter gene. Luciferase activity was expressed as a percentage of the maximum response observed for 2,3,7,8-TCDD (% TCDDmax). All mollusk samples elicited significant dioxinlike activity except those from Dalian (N1). The greatest magnitudes (±SD, data ex N1) of activity observed for these extracts ranged from 4.88±0.48% to 11.38±1.43% TCDDmax. The mean activity was 7.37±1.85% TCDDmax. Concentrations of TCDD-EQs in mollusk extracts were from 227.4 to 547.5 pg g-1 lipid. The cytotoxic effect of the mollusk extracts on cells was assessed at the same time. Six of the mollusk extracts (N2, N3, N4, S1, S2, and S4) caused noticeable growth inhibition over the exposure period at concentrations higher than 0.33% of the extracts concentrations (0.83 μL extract well-1). All the dilutions of sample N1 were cytotoxic to the H4IIE cells.
KW - Bioassay
KW - Bohai Sea coast
KW - Dioxinlike activity
KW - H4IIE-luc
KW - Mollusk
UR - http://www.scopus.com/inward/record.url?scp=34047111668&partnerID=8YFLogxK
U2 - 10.1016/j.ecoenv.2006.03.004
DO - 10.1016/j.ecoenv.2006.03.004
M3 - Article
C2 - 16647118
AN - SCOPUS:34047111668
SN - 0147-6513
VL - 67
SP - 157
EP - 162
JO - Ecotoxicology and Environmental Safety
JF - Ecotoxicology and Environmental Safety
IS - 1
ER -
