• 한국양식학회지
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• 제18권3호
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• pp.196-199
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• 2005

Farmed red sea breams, Pagrus major, were fed for 60 days with pellets containing different concentrations of benzo(a)pyrene (0, 0.2, 2, 20 mg/kg) to generate a biomarker of the chemical toxicity in the fish. The fish exposed to the chemical concentrations did not show any significant difference in the weight gain, conditioning, factor, and hepatosomatic index. However, some haematological parameters, such as glucose, calcium, magnesium, GOT (glutamic oxalate transaminase), and GPT (glutamic pyruvate transaminase) were influenced by the chemical exposure. Of them, two enzymes, GOT and GPT, increased significantly 60 days after the exposure in a way of concentration dependence (P<0.05). In the study of ecotoxicological biomarker, sensitivity to adverse environments is one of the key available factors. The fish changes in GOT and GPT were an earlier and reliable sign of the fish response against the chemical exposure, rendering the two enzymatic factors as a useful biomarker at least to benzo(a)pyrene exposure in the farming waters.

• 한국산업보건학회지
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• 제20권1호
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• pp.70-78
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• 2010

The purpose of this study is to investigate the appropriate metabolite as biomarker for the biomonitoring of 1,3-butadiene(BD) inhalation exposure. We measured the hemoglobin adducts which were extracted from the blood of the ICR mice inhalation exposure with 100ppm and 500ppm 1,3-butadiene for 2 weeks(5 hr/day ${\times}$ 5 days/week). Hemoglobin adducts were the (N-2-hydroxy-3 -butenyl) valine (HB Val) and (N-2,3,4-trihydroxy-butyl)valine (THB Val). Body weights of the exposure groups were significantly lower from 11 exposure post-day in 100ppm BD inhalation mice and from 7 exposure post-day in 500ppm BD inhalation mice than in control. The levels of HB Val are 0.8~1.7pmol/mg globin for 100ppm BD inhalation exposure, and 2.1~4.4 pmol/mg globin for 500ppm BD inhalation exposure. The levels of THB Val are 15.0~22.0 pmol/mg globin in 100ppm BD inhalation exposure, and 34.8~45.7 pmol/mg globin for 500ppm BD inhalation exposure. So the levels of THB Val and HB Val are proportional relationship with BD exposure level. THB Val is 12.9~18.8 times higher level that HB Val in 100ppm BD exposure group and 10.4~16.6 times higher level than HB Val in 500ppm BD exposure group. We concluded that THB Val is an appropriate metabolite as biomarker for the biomonitoring for BD inhalation exposure.

• Environmental Analysis Health and Toxicology
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• 제31권
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• pp.13.1-13.4
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• 2016

An analysis of patients and fatalities due to exposure to polyhexamethylene guanidine (PHMG) shows that PHMG causes mainly lung diseases such as pulmonary fibrosis. However, no research on the other organs has been conducted on this matter yet. So, an in-depth discussion on toxicological techniques is needed to determine whether or not PHMG is toxic to organs other than just the lungs. For the test of target organ toxicity by PHMG exposure, a toxicokinetic study must first be conducted. However, measurement method for PHMG injected into the body has not yet been established because it is not easy to analyze polymer PHMG, so related base studies on analytical technique for PHMG including radio-labeling chemistry must come first. Moreover, research on exposure-biomarker and effect-biomarker must also be conducted, primarily related to clinical application. Several limitations seem to be expected to apply the biomarker study to the patient because much time has passed after exposure to the humidifier disinfectant. It is why a more comprehensive toxicological researches must be introduced to the causality for the victims.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 1998년도 환경의 날 기념 심포지움 : 환경위해성평가 및 관리를 위한 연구방향
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• pp.85-93
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• 1998

• Fisheries and Aquatic Sciences
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• 제6권4호
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• pp.225-227
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• 2003

Acetylcholinesterase (AChE) activity is a potential biomarker for phenanthrene exposure in aquatic organisms. Olive flounder (Paralichthys olivaceus) were exposed to three different concentrations (0.5, 1.0 and 2.0, uM) of phenanthrene for four weeks. AChE activities in the brain, heart and eyes were documented. Inhibition of AChE activity was found significant in flounder treated with a concentration greater than $1.0 {\mu}M$ of phenanthrene. This indicates that a chronic exposure to phenanthrene induces damage in various organs (brain, heart and eyes) and changes of AChE activities might be a useful biomarker to assess the impacts induced by polycyclic aromatic hydrocarbon (PAH). Evidence from this study confirms that the measurement of AChE in the brain and eyes of flounder is a valuable tool that along with other biomarkers can maximize an ecotoxicologists' confidence in assessing the impacts of oil and PAH pollution in the aquatic environment.

• Fisheries and Aquatic Sciences
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• 제7권3호
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• pp.171-173
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• 2004

Activity of acetylcholinesterase (AChE) is well known as a biomarker of exposure to organophosphate compounds in aquatic organisms. However, the effect of diethyl phthalate (DEP), a widely used plasticizer, on the chance of AChE activity is not yet known. Olive flounder (Paralichthys olivaceus) were exposed to DEP 300 and 1,000 mg DEP/kg b.w. through three times of intraperitoneal injection and effects were assessed in AChE activity of brain, muscle, heart and eyes of the exposed fish. AChE activity in various tissues of flounder was inhibited after exposure to DEP as a concentration-dependent manner, especially in brain, muscle and heart. Among tissues examined, heart is supposed to be a major part of body which is seriously damaged by DEP exposure. It indicates that DEP induces toxic effects in various organs (brain, muscle and heart), and changes of AChE activities. Such changed activities of AChE might be a useful biomarker to assess the impacts induced by phthalate esters including DEP.

• Molecular & Cellular Toxicology
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• 제2권2호
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• pp.75-80
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• 2006

Biomarkers identify various stages and interactions on the pathway from exposure to disease. The three categories of biomarkers are those measuring susceptibility, exposure and effect. Susceptibility biomarkers are identifiable genetic variations affecting absorption, metabolism or response to environmental agents. Biomarkers of exposure indicate the amount of a foreign compound that is absorbed into the body. Biological measurements performed on human tissues are vastly expanding the capabilities of classical epidemiology, which has relied primarily on estimates of human exposure derived form chemical levels in the air, water, and other exposure routes. Biomarkers of exposure indicate the amount of a foreign compound that is absorbed into the body. Biological measurements performed on human tissues are vastly expanding the capabilities of classical epidemiology, which has relied primarily on estimates of human exposure derived form chemical levels in the air, water, and other exposure routes. The biomarker response is typical of chemical pollution by specific classes of compound, such as (i) heavy metals (mercury, cadmium, lead, zinc), responsible for the induction of metallothionein synthesis, and (ii) organochlorinated pollutants (PCBs, dioxins, DDT congeners) and polycyclic aromatic hydrocarbons (PAHs), which induce the mixed function oxygenase (MFO) involved in their bio transformations and elimination. Currently genomic researches are developed in human cDNA clone subarrays oriented toward the expression of genes involved in responses to xenobiotic metabolizing enzymes, cell cycle components, oncogenes, tumor suppressor genes, DNA repair genes, estrogen-responsive genes, oxidative stress genes, and genes known to be involved in apoptotic cell death. Several research laboratories in Korea for kicking off these Environmental Genomics were summarized.

• Environmental Analysis Health and Toxicology
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• 제15권3호
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• pp.81-91
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• 2000

Residents who live near petrochemical industrial areas are exposed to a variety of petrochemicals, including benzene or benzene-containing liquids. It is a serious concern because some VOCs are carcinogens naturally present in petroleum and gasoline. The aim of this study was to assess the exposure to VOCs, measured by personal/indoor/outdoor air sampling, and to estimate the relationship between the air samples and biological monitoring data. Through biological monitoring, we investigated VOCs in blood and s-phenylmercapturic acid (s-PMA) , minor urinary metabolites of benzene. The external benzene exposure of subjects was measured using passive dosimeters and urinary s-PMA and blood-benzene were determined by GC/MS. More than 80% of subjects were detected for m-xylene, ethylbenzene, and toluene in blood samples and not detected at all for chloroform, 1 , 1 , 1 -trichloroethylene, and tetrachloroethylene. The mean concentration of benzene in the breathing zone of residents was 6.3 $\mu\textrm{g}$/m$^3$, personal, indoor and outdoor concentrations were strongly correlated to each other. s-PMA detected in all subject samples was affected by personal exposure (p< 0.05) and the level was different by age (p< 0.01). Blood benzene was not affected by external benzene during these periods .

• Molecular & Cellular Toxicology
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• 제3권3호
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• pp.185-189
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• 2007

Gene expression levels of choriogenin, vitellogenin and estrogen receptor were determined using Reverse transcription (RT)-PCR technique after exposure to estrogenic chemical bisphenol A in the Korean wild medaka (Oryzias sinensis). These genes have been known to be induced in male test fish when the fish are exposed to estrogenic chemicals. Therefore they can be suggested as a possible biomarker of endocrine disruption in fish, however, relatively little has been known about these genes expression by estrogenic chemicals in Korean wild fish. Mature male Oryzias sinensis were treated with bisphenol A at nominal concentrations of 0.02, 0.2 and 2 mg/L for 6 days and total RNA was extracted from the livers of treated fish for RT-PCR. When the five biomarker genes were amplified by RT-PCR in the same condition, mRNA induction level of each gene was elevated with different sensitivities. Conclusively, the results of this work indicated that measurement of vitellogenin and choriogenin using RT-PCR is effective as a simple tool for the screening of estrogenic chemicals and suggested that O. sinensis would be a suitable model fish for the environmental risk assessment of potential endocrine disruptors.

• 한국식품위생안전성학회지
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• 제14권4호
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• pp.408-414
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• 1999

자연계에 오염되어 있는 수많은 화학 물질들은 정상적인 내분비 기능을 교란한다. 내분비 교란 물질은 수계에 오염되면 야생동물과 사람에게 건강에 미치는 영향이 크다. 본 연구는 오염물질이 생체의 내분비계를 교란시키므로서 생성되는 난황 전구체 단백질로서 환경오염의 생물체의 지표로서 비트로게닌의 생성을 유도하는 내분비 교란 물질에 대하여 고찰하였다. 수계의 환경에서 서식하고 있는 물고기는 내분비계 교란 물질에 의하여 암컷에서는 번식률과 난백의 생산이 감소되고 수컷에서는 정소의 왜소화 및 암컷화로 유도되기도 한다. 여성호르몬 작용을 하는 화학물질에 노출된 수컷은 비트로게닌의 생성을 촉진하고, 암컷에 있어서 비트로게닌의 생성은 난백을 형성하는 동안 에스트로겐의 함량을 증가시켜 정상적인 활동을 제한하기도 한다. 따라서 수컷에서의 비트로게닌은 환경에 오염된 내분비교란 물질의 오염에 의하여 생성되게 된다. 결과적으로 수컷의 물고기에서 생성된 비트로게닌은 환경에 오염된 내분비 교란물질이 어느 정도 노출되어 있는가를 결정하는 생물학적 지표로 사용할 수 있다. 특히 치어의 경우 극미량의 내분비 교란물질에 노출되어도 믿을 만한 생물지표로서 이용될 수 있다.