• 한국환경보건학회지
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• 제28권4호
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• pp.1-5
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• 2002

Drosophila Kc cells are ecdysone-responsive : hormone treatment leads rapidly to increased synthesis of several ecdysone-inducible polypeptides (EIPs) and to commitment to eventual proloferative arrest. Later the treated cells undergo morphological transformation, cease to proliferate and to grow. These responses have proven useful as models for studying ecdysone action and environmental endocrine disrupting actions. In this study, we used 20-HE to check out the Kc cells properties to the ecdysone and this properties will be applied to the environmental chemicals to find out the endocrine disrupting action in ecosystem. The cell counts of cultures harvested after 3 days' growth in the presence of 20-hydroxyecdysone. In Kc cell cultures, there were statistically significant different from control cells at 20HE 10/sup 7/-10/sup 5/. The morphological effects of all the hormones were similar, differing only in the dose level at which they were initiated.

• Asian-Australasian Journal of Animal Sciences
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• 제19권11호
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• pp.1588-1596
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• 2006

An experiment was conducted to study the effect of different dietary protein levels on the performance, nutrient balances, blood biochemical parameters and thyroid hormones of crossbred calves. Thirty crossbred (Bos taurus${\times}$Bos indicus) calves aged 3-5 months were divided into 3 equal groups of 10 each and fed graded levels of crude protein, namely 100 (NP), 75 (LP) and 125 (HP) percent of the Kearl recommendations for 105 d. The calves had access to ad libitum oat hay as the basal roughage. A metabolism trial of 6 d duration was conducted at 90 d of the study. Blood collection and its analysis for various hematological and biochemical parameters as well as thyroid hormones was done both during the pre- and post-experimental periods. The fortnightly body weight changes and the net gain did not differ significantly due to dietary variation. The average daily gain was $367{\pm}21.6$, $347{\pm}22.9$ and $337{\pm}26.4g$ in calves fed NP, LP and HP diets, respectively. Averaged across the feeding trial, oat hay intake was higher (p<0.05) in NP animals than HP or LP fed groups. The dry matter (DM) intake showed no significant difference between the 3 groups but the DM digestibility was higher (p<0.05) in the HP fed animals. The digestibility of crude protein, organic matter, crude fiber and nitrogen-free extract was significantly higher (p<0.05) on HP diets compared to LP or NP diets. The calves on all 3 diets were in positive nitrogen (N) balance, however the N retention was higher (p<0.05) in HP than in LP fed calves. The intake and retention of calcium and phosphorus were similar between the treatments. The blood biochemical profile revealed no significant influence of the dietary treatments on hemoglobin, packed cell volume as well as serum levels of glucose, total protein, albumin, globulin, Ca, P, and alkaline phosphatase. Serum levels of the circulating thyroid hormones ($T_3$ and $T_4$) tended to be lower (p>0.05) on feeding of the LP diet besides showing an increasing trend with the advancement of age. Considering the similar performance and metabolic profile, it could be concluded that crossbred calves can be satisfactorily reared on 25% lower protein level as recommended by Kearl for developing countries, which would not only economize the cost of production but also help to reduce environmental pollution attributable to livestock production.

• 한국작물학회지
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• 제42권1호
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• pp.33-41
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• 1997

작물 원형질체를 배양하면서 세포의 생존과 노화 그리고 고사의 상태를 대사적으로 정확히 판단이 가능한 marker물질을 확인하고 간편한 측정법을 확립하기 위하여 일련의 연구를 수행하였던 바 그 결과를 요약하면 다음과 같다. 1. 담배와 벼의 원형질체를 나출하여 MS와KM-8P를 기본배지로 하여 2,4-K와 CM을 첨가하였던 바, ABA는 경시적으로 감소하였으며 CM첨가에 의해서 더 많이 감소하였다. GA$_3$, IAA, zeatin은 반대로 증가하는 경향을 나타내었다. 특히 ABA의 감소율과 zeatin의 증가율이 가장 크게 나타났다. 2. Osmoticum(mannitol)을 적정 농도 이상으로 처리하였을 때 ABA는 일시적으로 증가되었다가 감소되었고, 다른 성장 호르몬은 모두 증가폭이 농도가 증가될수록 둔화되었다. 3. Supermine 10mM과 NaCl을 처리하였을 때 담배와 벼에서 각 호르몬의 증감은 서로 반대로 나타났다. 특히 담배는 NaCl의 stress가 크게 나타났다. 그리고 배양 후반기에는 원형질체의 분열이 중지되었다. 4. 원형질체의 배지 성분을 제거하고 32$^{\circ}C$로 고온 배양에 의해서 인위적으로 노화를 촉진시켰을 때 세포의 활력은 48시간 이후에 크게 감소되었다. 세포의 활력 상실과 반비례적으로 ABA는 배양 10일까지 크게 증가되었다. 이와 반대로 성장 호르몬들은 모두 증가되지 않고 감소가 이루어졌다. 특히 zeatin의 감소가 크게 나타났다. 5. 이상의 결과에 따라서 식물 호르몬은 원형질체가 처한 환경 요인이나 부여된 어떤 조건에 따라서 민감하게 변동하고 있음을 확인하였다.

• 한국환경보건학회지
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• 제44권5호
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• pp.502-513
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• 2018

Objectives: Stress hormone (cortisol) can be used to analyze psychological and physiological changes and healing effects before and after in blood and saliva. Here it is applied to scientifically validate the effects of the healthy forest experience in Deogyusan Mountain National Park. Methods: A healthy forest experience program was provided to college students (males and females) at Deogyusan National Park. Stress, hormones (cortisol), blood pressure, pulse, oxygen saturation and stress, anxiety, and depression were measured. This study was designed to objectively analyze the effects of stress hormones before and after. Results: Depression, stress, anxiety, and satisfaction with the forest experience program in Deogyusan National Park were very high in reliability in terms of Cronbach's Alpha: depression scored 0.910, stress 0.558, anxiety 0.934, program satisfaction 0.826, and program effectiveness 0.894. Conclusions: In this study, we utilized the Healthy Forest Experience Program and the 'Health and Medical Center Health Record Book' of the Health Forest Experience Program (Ministry of Environment's Environmental Education Certification Program). In the future, we will seek ways to utilize saliva since it is easier to collect than blood samples and apply the stress hormone cortisol as a saliva authentication program. In addition, by implementing ecological welfare programs in which nature and human beings coexist through systematic preservation and restoration, the national park management can utilize ecological, scenic and cultural services wisely. We expect to be able to provide exploration and welfare services.

• Asian Pacific Journal of Cancer Prevention
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• 제13권12호
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• pp.5937-5946
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• 2012

The term endocrine disruptors is used to describe a variety of natural and manmade substances that have the capacity to potentially interfere with and modify the normal physiology of endocrine system either by mimicking, blocking or modulating the actions of natural endogenous hormones. The rising incidence of breast cancer over the last 50 years and the documented higher incidence in urban as compared to rural areas suggest a relationship to the introduction and increased use of xenoestrogens in our environment. The literature has developed over the last decades where initial experiments on endocrine disruptors did not support an involvement in breast cancer, and then evidence mounted implicating various environmental factors including hormones, endocrine disrupting chemicals and non-endocrine disrupting environmental carcinogens in the pathogenesis of breast cancer. Available data support the hypothesis that exposure to endocrine disruptors in utero leaves a signature on mammary gland morphogenesis so that the resulting dysgenic gland becomes more predisposed to develop tumors upon exposures to additional insults later on during life. Exceptionally, exposure to phytoestrogens could be beneficial to human health. Most of the available data are from well developed countries while the developing countries are still understudied regarding these issues. Here, we raise a note of caution about potential role of environmental toxins including endocrine disruptors in breast cancer development and call for serious measures to be taken by all involved parties in the developing world.

• 한국환경과학회지
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• 제30권5호
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• pp.407-412
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• 2021

This study aims to present basic data on long-term sexual effects of Savory (Satureja hortensis) by analyzing its zinc and V.B3 contents. These contents result in the activation of sexual functions induced by the blood concentration of sex hormones, thus improving menopauale symptoms. Results were obtained on August 20, 2020 after experimenting with 100 g of the herb from six indoor (green-house) experimental plots. The V.B3 results were analyzed using 100 g of Savory planted in open soil. Zinc had the highest values at 2.161 mg from the bed soil compounded with sapolite and poultry manure in the indoor condition and 2.077 mg from bed soil mixed with clay in the outdoor condition. The presence of V.B3 in Savory was also confirmed. Further research should be conducted on the interactions between Savory and other herbs.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2003년도 춘계학술대회
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• pp.190-191
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• 2003

Endometriosis is classically defined as the growth of endometrial glands and stroma at extrauterine sites. Although it is a common gynecological problem accompanied by chronic pelvic pain, infertility, and adhesion formation, the etiology of this disease is unknown. Endometriosis pathogenesis may involve endocrine and immune dysfunction since uterine endometrial growth is regulated by sex hormones in concert with bioactive mediators produced by uterine immune and endocrine cells. Thus, exposure to environmental toxicants disrupting endocrine and immune responses potentially affect the development and progression of endometriosis.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2020년도 정기학술대회 발표논문집
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• pp.218-218
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• 2020

Astaxanthin, a natural antioxidant carotenoid, has been thought to provide health benefits by decreasing the risk of oxidative stress?related diseases. In the present study, we investigated the effect of an astaxanthin during the autophagic cell death induced by bisphenol A (BPA) which is known major environmental pollutants. We found that astaxanthin significantly blocked the autophagic cell death via inhibition of intracellular Reactive Oxygen Species (ROS) in normal human dermal fibroblasts. Astaxanthin significantly inhibited the phosphorylation mitogen-activated protein kinase (MAPK) and nuclear factor-kappa B (NF-κB) responsible for the expression of LC3-II and Beclin-1 in BPA-treated normal human dermal fibroblasts. We suggest that astaxanthin blocks autophagic cell death induced by BPA via the inhibition of ROS-mediated signaling events in human dermal fibroblasts.

• 한국식품영양과학회지
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• 제38권3호
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• pp.287-291
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• 2009

산수유를 기능성식품 소재로서 이용하기 위하여 산수유 에탄올추출물의 생리활성을 조사하였다. 산수유 에탄올추출물의 수소공여능은 농도 의존적으로 증가되었으며, 300 및 $500{\mu}g/mL$ 농도에서 각각 64, 73%의 활성을 나타내었다. 대식세포 RAW264.7에 산수유 에탄올추출물을 100, 300 및 $500{\mu}g/mL$의 농도로 처리하였을 때 산수유추출물은 농도 의존적으로 NO(nitric oxide)의 생성을 유도하였다. 또한 산수유 에탄올추출물을 유방암세포에 다양한 농도로 처리하여 24, 48, 72시간 반응시킨 결과 농도 및 시간에 의존적으로 유방암세포의 증식을 억제하였으며, $500{\mu}g/mL$ 농도로 72 시간 처리 시 60% 이상의 높은 증식억제율을 보여주었다. 또한, MCF-7 유방암 세포에 bisphenol과 $17{\beta}$-estradiol과 같은 환경호르몬을 $0.1{\mu}M$의 농도로 처리하였을 때 세포의 증식이 유도되었으며, 이 세포에 산수유 에탄올추출물을 농도별로 72시간 처리하였을 때 유방암 세포의 증식이 억제되었다. 따라서 본 연구결과는 산수유의 기능성식품 소재로서의 활용 가능성을 시사한다.

• Toxicological Research
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• 제35권1호
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• pp.9-12
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• 2019

One of the major challenges in methadone maintenance therapy (MMT) for drug dependence is the physiological side effects on endocrine hormones. Because of the key role of the thyroid gland in the normal functioning of the human body and brain, this study examined the effect of MMT on thyroid function. Thyroid hormones (T3, T4, and thyroid-stimulating hormone (TSH)) were evaluated in normal and user treated with MMT who were referred to the Province Clinical & Pathology Center of Urmia, Iran. The study was conducted for three months using the Case Series method. A total of 270 samples were collected, 215 were from individuals who were not treated, whereas 55 were from men treated with methadone. Average levels of T3 and T4 in non-treated sample of men are $1.34{\pm}0.02ng/mL$ and $90.96{\pm}1.38ng/mL$ while the corresponding values for patients treated with methadone are $1.39{\pm}0.04ng/mL$ for T3 and $94.57{\pm}2.72ng/mL$ for T4. Mean TSH levels of the non-treated group and the methadone consuming group were $1.75{\pm}0.08{\mu}IU/mL$ and $3.17{\pm}0.45{\mu}IU/mL$, respectively. These results indicate that although men treated with methadone had higher levels of T3, T4, and TSH than normal individuals, only the difference in TSH level was significant. The importance of this difference among individuals on methadone maintenance programs should be investigated in larger samples over long periods of time. Additionally, the effects of methadone treatment on women should be examined.