• Molecular & Cellular Toxicology
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• 제5권2호
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• pp.172-178
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• 2009

Nanoparticles are small-scale substances (<100 nm) with unique properties, complex exposure and health risk implications. Aluminum oxide ($Al_2O_3$) nanoparticles (NP) have been widely used as abrasives, wear-resistant coatings on propeller shafts of ships, to increase the specific impulse per weight of composite propellants used in solid rocket fuel and as drug delivery systems to increase solubility. However, recent studies have shown that nano-sized aluminum (10 nm in diameter) can generate adverse effects, such as pulmonary response. The cytotoxicity and genotoxicity of $Al_2O_3$ NP were investigated using the dye exclusion assay, the comet assay, and the mouse lymphoma thymidine kinase (tk$^{+/-}$) gene mutation assay (MLA). IC$_{20}$ values of $Al_2O_3$ NP in BEAS-2B cells were determined the concentration of 273.44 $\mu$g/mL and 390.63 $\mu$g/mL with and without S-9. However IC$_{20}$ values of $Al_2O_3$ NP were found nontoxic in L5178Y cells both of with and without S-9 fraction. In the comet assay, L5178Y cells and BEAS-2B cells were treated with $Al_2O_3$ NP which significantly increased 2-fold tail moment with and without S-9. Also, the mutant frequencies in the $Al_2O_3$ NP treated L5178Y cells were increased compared to the vehicle controls with S-9. The results of this study indicate that $Al_2O_3$ NP can cause primary DNA damage and cytotoxicity but not mutagenicity in cultured mammalian cells.

• 동의생리병리학회지
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• 제19권5호
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• pp.1405-1410
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• 2005

Asthma is recognized today as an inflammatory disease of the lung characterized by acute non-specific airway hypersensitiveness in association with chronic pulmonary inflammation. Gamijihwang-tang(GJT), a fortified prescription of YMJHT, is applied for the treatments of chronic coughing and asthma, and post-delivery coughing and asthma in the gynecology. Also in the clinical practice, GJT is known to be very effective for controlling coughing and asthma as a cold sequoia. In this study, we investigated the effects of GJT on the lipopolysaccharide (LPS)-induced nitric oxide (NO) and prostaglandin $E_2$ ($PGE_2$) production, and on the level of inducible nitric oxide synthase (iNOS) and Cyclooxygenase-2 expression in murine macrophage RAW 264.7 cells. We found that GJT inhibited LPS-induced NO and $PGE_2$ production in a dose dependent manner. Furthermore, GJT inhibited the expression of LPS-induced iNOS and COX-2 protein and mRNA expression in RAW 264.7 macrophages. Treatment with GJT of RAW 264.7 cells transfected with a reporter construct indicated a reduced level of LPS-induced nuclear factor-KB (NF-kB) activity and effectively lowered NF-kB binding as measured by transient transfection assay. These results suggest that the main inhibitory mechanism of the GJT may be the reduction of iNOS and COX-2 gene expression through blocking of NF-kB activation.

• Tuberculosis and Respiratory Diseases
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• 제50권3호
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• pp.293-299
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• 2001

연구배경 : Theophylline은 천식 치료에 있어 효과적이고 쉽게 사용할 수 있는 약물 중의 하나이다. 그러나 치료영역이 좁아 혈청농도의 적은 변화에도 독성증상이 나타나거나 약물효과를 나타내지 않는 경우가 발생할 수 있다. 또한 일상적인 1일 2회 제형은 1일 1회 제형에 비해 순응도를 낮은 단점이 있다. 저자들은 1일 2회 제형인 에테오필$^{(R)}$ 1일 1회 제형인 유니필$^{(R)}$을 천식환자에게 투여 후 혈청 농도측정과 폐기능 검사를 시행하여 두 제형외 약효비교와 한국인에서도 1일 1회 제형의 사용이 보편화될 수 있는지에 대해 알아보고자 하였다. 방 법 : 28일동안 에테오필$^{(R)}$ 200mg 이나 400mg을 하루 2회 오전 8시와 오후 8시에 분복하도록 하였으며 28일째 오후 7시에 theophylline 혈청 농도와 폐기능 검사를 시행하고 29일째부터 동량의 유니필$^{(R)}$을 오후 8시에 1회 복용하도록 하였다. 56일째 오후 7시에 theophylline 혈청 농도와 폐기능 검사를 다시 시행하여 비교하였다. 결 과 : Theophylline 혈청 농도는 에테오필$^{(R)}$ 투여기간에 $8.18{\pm}1.66{\mu}g/ml$, 유니필$^{(R)}$투여기간에서 $8.00{\pm}1.75{\mu}g/ml$로 통계학적으로 유의한 차이는 보이지 않았다. 폐기능 검사에서 노력형 1초 호기량 역시, 에테오필$^{(R)}$ 투여기간에 $71.40{\pm}7.48%$, $69.18{\pm}9.00%$로 통계학적으로 유의한 차이는 보이지 않았다. 결 론 : 유니필$^{(R)}$ 투여기간과 기존의 에테오필$^{(R)}$ 투여기간을 비교할 때, 통계적으로 유의한 차이가 없는 정도의 theophylline 혈청 농도와 노력성 1초 호기량올 보여줌으로서 천식치료에서 1일 1회 제형의 유니필$^{(R)}$ 사용의 객관적 근거로 제시될 수 있었다.