• Fisheries and Aquatic Sciences
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• 제8권2호
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• pp.76-82
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• 2005

We analyzed the paralytic shellfish poisoning (PSP) toxins of the toxic marine dinoflagellate Alexandrium tamarense collected from Dadaepo and Gaduck-do in Busan and from Sujeong-ri in Jinhae Bay, Korea, in April 2003. We also analyzed the PSP toxin of mussels (Mytilus galloprovincialis) and oysters (Crassostrea gigas) collected around Busan and Jinhae Bay. PSP toxin analyses were conducted by high performance liquid chromatography (HPLC). Fifteen cultured A. tamarense isolates contained 2.78 to 57.47 fmol/cell, with nearly identical toxin profiles: major components C2, GTX4; minor components C1, GTX1, NEO; and trace components GTX2, GTX3, STX. PSP toxin contents were 0 to $492\;\mu{g}$ STXeq/100 g in mussels and 0 to $48\;\mu{g}$ STXeq/100 g in oysters. Mussels at Gijang and Sujeong-ri contained the most PSP toxin contents ($492\;\mu{g}\;STXeq/100\;g\;and\;252\;\mu{g}\;STXeq/100\;g,\;respectively$), exceeding the quarantine level ($80\;\mu{g}$ STXeq/100 g). Their dominant toxin components were C2, C1, GTX2, and GTX3; the minor components GTX1, GTX4, GTX5, and NEO were sporadically detected. Phytoplankton contained 0.774 fmol/L seawater and 1.228 fmol/L seawater at Gijang and Sujeong-ri in April. At that time, Alexandrium cells were present in the water column at Gijang at 2,577 cells/mL and at Sujeong-ri at 6,750 cells/mL. Overall, we found the high and similar PSP toxin contents in AZexandrium isolates and mussels, and a correlation between occurrence of toxic Alexandrium cells in the water column and mussel intoxification. High densities of toxic Alexandrium cells in the water column immediately preceded shellfish intoxification at Gijang and Sujeong-ri in April.

• 한국물환경학회지
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• 제23권5호
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• pp.659-664
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• 2007

The objective of this study is to evaluate the detoxification method for the endocrine disrupting chemicals by manganese oxide. Manganese coated sand and bisphenol-A (BPA) was used as the reactive medium and the contaminant. Results showed that manganese oxide effectively degrades BPA by oxidative coupling reaction. The nonlinear oxidative coupling reaction orders were obtained for BPA and oxide, respectively. The reaction rate of BPA decreased as initial BPA concentration increased, as oxide loading decreased and as pH increased. The higher ionic strength, the higher reaction rate was observed. Divalent cations were adsorbed on the oxide surfaces, resulting in the decreased degradation rate of BPA.

• 약학회지
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• 제36권3호
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• pp.285-290
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• 1992

After rats were exposed to 5,000 ppm carbon monoxide for 30 minutes, the amounts of catecholamine neurotransmitters in stratum were measured using high performance liquid chromatograph equipped with electrochemical detector. The concentration of dopamine in stratum was significantly decreased after carbon monoxide intoxification, but those of dihydroxyphenylacetic acid, norepinephrine, and epinephrine was not changed. However the pretreatments of Ginseng total saponin and panaxatriol saponin increased the concentrations of dopamine and its acidic metabolites (DOPAC and HVA). Ginseng total saponin also increased the concentrations of norepinephrine and epinephrine. Similar results were obtained from aged rats.

• Journal of Microbiology and Biotechnology
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• 제16권11호
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• pp.1784-1790
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• 2006

Bacillus anthracis is a causative agent of anthrax. Anthrax toxins are composed of a protective antigen (PA), lethal factor (LF), and edema factor (EF), in which the PA is a central mediator for the delivery of the two enzymatic moieties LF and EF. Therefore, the PA has been an attractive target in the prevention and vaccinization for anthrax toxin. Recently, it has been reported that the molecule consisting of multiple copies of PA-binding peptide, covalently linked to a flexible polymer backbone, blocked intoxification of anthrax toxin in an animal model. In the present study, we have screened novel diverse peptides that bind to PA with a high affinity (picomolar range) from an M13 peptide display library and characterized the binding regions of the peptides. Our works provide a basis to develop novel potent inhibitors or diagnostic probes with a diverse polyvalence.

• 한국식품영양과학회지
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• 제36권5호
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• pp.521-526
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• 2007

홍삼분말이 $B(\alpha)P$의 투여에 의한 간 독성이 유발된 생쥐에서의 글루타치온 및 과산화지질 함량, 항산화효소 활성에 미치는 영향을 살펴보았다. $B(\alpha)P$ 투여에 의해 증가된 혈청내 ALT와 AST의 활성이 홍삼분말 전 처리군에서는 감소하였다. 간 조직중의 글루타치온 함량은 $B(\alpha)P$ 단독군에서는 감소되었다가 홍삼분말 투여시 유의적인 증가를 보였고, 지질과산화물 함량은 $B(\alpha)P$ 투여시 증가되었다가 홍삼분말의 투여시 유의적으로 감소되었다. 간 조직중의 SOD, catalase 그리고 GSH-Px의 활성도 $B(\alpha)P$ 투여로 유의적으로 증가되었다가, 홍삼분말의 투여로 이들 활성이 유의적으로 감소하였다. 반면, GST 활성은 $B(\alpha)P$ 단독군에서는 감소되었다가 홍삼분말 투여시 유의적인 증가를 보였다. 이상의 결과로 홍삼분말은 항산화효소의 활성에 의한 $B(\alpha)P$에 의한 간 손상에 대한 보호효과를 가지는 것으로 사료된다.

• Journal of Ginseng Research
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• 제30권3호
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• pp.112-116
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• 2006

본 연구는 TCDD로 급성독성을 유도한 자정 기니픽의 대퇴골 무게감소에 대한 홍삼사포닌의 효과를 조사하기 위해 수행하였다. 48 마리의 자성기니픽 ($820{\pm}25\;g$)을 6 군으로 나누어 정상군 (NC), TCDD 단독투여군 (TT), 사포닌 전투여 군 (PE10, 20), 사포닌후투여군 (CE10, 20)으로 나누었다. NC군은 vehicle과 saline 만을 투여하였고, TT군은 TCDD를 단회투여 ($5.0\;{\mu}g$, i.p) 하였다. PE10 및 20군은 TCDD 투여 1 주일 전부터 총 3 주동안 사포닌을 투여 (복강) 하였다. 반면 CE10 및 20군은 TCDD 투여한 직후부터 총 3 주동안 사포닌을 투여 (복강) 하였다. 사포닌 투여군의 체중변화를 살펴보면 TT군은 TCDD 투여후 유의적인 체중감소 현상이 관찰되었으나 PE10, 20 및 CE10, 20 등 사포닌 투여군에서는 TT군에 비해 체중이 모두 증가하는 경향을 보였다 . TCDD 투여는 지정기니픽의 대퇴골 무게를 유의적으로 감소시키는 반면 홍삼사포닌의 투여는 대퇴골 무게감소를 억제하는 경향을 보였다. 대퇴골 무게감소 억제현상은 PE20군에서 가장 높게 나타났다. 대퇴골의 $Ca^{2+}$도 TT군은 NC군 대비 약 20.4% 감소하는데 반해 사포닌 투여군은 TT군 대비 $Ca^{2+}$ 함량이 증가되는 경향을 나타내었다. 이러한 결과로부터 홍삼사포닌은 TCDD에 의해 억제된 기니픽의 대퇴골 내 $Ca^{2+}$ 함량을 증가시킴으로써 대퇴골의 무게감소를 회복시키는 것으로 추론할 수 있겠다.