@article{oai:repo.qst.go.jp:00045786, author = {Nakamori, Taizo and Fujimori, Akira and Kinoshita, Keiji and Ban-nai, Tadaaki and Kubota, Yoshihisa and Yoshida, Satoshi and 中森 泰三 and 藤森 亮 and 坂内 忠明 and 久保田 善久 and 吉田 聡}, issue = {5}, journal = {Environmental Pollution}, month = {May}, note = {The gene expression of environmental organisms is useful as a biomarker of environmental pollution. One of its advantages is high sensitivity. We identified the cDNA of a novel cadmium-responsive gene in the soil collembolan Folsomia candida. The deduced protein, designated "metallothionein-like motif containing protein" (MTC), was cysteine-rich and contained a metallothionein-like motif with similarity to metallothionein, bat had a much longer sequence than metallothionein and contained repeated sequences of amino acids. Expression of MTC mRNA was sensitively induced by cadmium exposure at 0.3 mg/kg of dry food, a concentration at which toxic effects are not observed, but expression was not affected by #-ray exposure (an inducer of oxidative stress). These findings suggest that MTC is involved in cadmium-binding processes rather than in oxidative stress responses. In conclusion, we suggest that gene expression of MTC may be a candidate biomarker for detecting low levels of cadmium contamination in soil.}, pages = {1689--1695}, title = {mRNA expression of a cadmium-responsive gene is a sensitive biomarker of cadmium exposure in the soil collembolan Folsomia candida}, volume = {158}, year = {2010} }