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1.
Journal of Korean Medical Science ; : 1188-1198, 2014.
Article Dans Anglais | WPRIM | ID: wpr-140361

Résumé

2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) can induce drug transporter genes such as the ATP-binding cassette G member 2 (ABCG2), which contributes to multidrug resistance. We investigated the effect of TCDD pretreatment on drug transporters induction from cancer cells of various origins. Cell viabilities after treatment of cisplatin were measured to evaluate acquiring cisplatin resistance by TCDD. Acquring cisplatin resistance was found only in cisplatin senstivie cancer cells including gastric SNU601, colon LS180, brain CRT-MG and lymphoma Jurkat cells which showed a significant increase in cell viability after combined treatment with TCDD and cisplatin. High increase of ABCG2 gene expression was found in SNU601 and LS180 cells with a mild increase in the expression of the ABCC3, ABCC5,and SLC29A2 genes in SNU601 cells, and of major vault protein (MVP) in LS180 cells. The AhR inhibitor kaempferol suppressed the upregulation of ABCG2 expression and reversed the TCDD-induced increase in cell viability in LS180 cells. However, in CRT-MG cells, other transporter genes including ABCC1, ABCC5, ABCA3, ABCA2, ABCB4, ABCG1, and SLC29A1 were up-regulated. These findings suggested the acquiring cisplatin resistance by TCDD associated with cancer cell-type-specific induction of drug transporters.


Sujets)
Humains , Transporteurs ABC/génétique , Lignée cellulaire tumorale , Survie cellulaire/effets des médicaments et des substances chimiques , Cisplatine/pharmacologie , Résistance aux médicaments antinéoplasiques/effets des médicaments et des substances chimiques , Transporteur équilibrant de nucléosides de type 2/génétique , Cellules Jurkat , Cellules K562 , Kaempférols/pharmacologie , Protéines associées à la multirésistance aux médicaments/génétique , Protéines tumorales/génétique , ARN messager/métabolisme , Récepteurs à hydrocarbure aromatique/métabolisme , Dibenzodioxines polychlorées/pharmacologie , Régulation positive/effets des médicaments et des substances chimiques , Particules de Vault/génétique
2.
Journal of Korean Medical Science ; : 1188-1198, 2014.
Article Dans Anglais | WPRIM | ID: wpr-140360

Résumé

2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) can induce drug transporter genes such as the ATP-binding cassette G member 2 (ABCG2), which contributes to multidrug resistance. We investigated the effect of TCDD pretreatment on drug transporters induction from cancer cells of various origins. Cell viabilities after treatment of cisplatin were measured to evaluate acquiring cisplatin resistance by TCDD. Acquring cisplatin resistance was found only in cisplatin senstivie cancer cells including gastric SNU601, colon LS180, brain CRT-MG and lymphoma Jurkat cells which showed a significant increase in cell viability after combined treatment with TCDD and cisplatin. High increase of ABCG2 gene expression was found in SNU601 and LS180 cells with a mild increase in the expression of the ABCC3, ABCC5,and SLC29A2 genes in SNU601 cells, and of major vault protein (MVP) in LS180 cells. The AhR inhibitor kaempferol suppressed the upregulation of ABCG2 expression and reversed the TCDD-induced increase in cell viability in LS180 cells. However, in CRT-MG cells, other transporter genes including ABCC1, ABCC5, ABCA3, ABCA2, ABCB4, ABCG1, and SLC29A1 were up-regulated. These findings suggested the acquiring cisplatin resistance by TCDD associated with cancer cell-type-specific induction of drug transporters.


Sujets)
Humains , Transporteurs ABC/génétique , Lignée cellulaire tumorale , Survie cellulaire/effets des médicaments et des substances chimiques , Cisplatine/pharmacologie , Résistance aux médicaments antinéoplasiques/effets des médicaments et des substances chimiques , Transporteur équilibrant de nucléosides de type 2/génétique , Cellules Jurkat , Cellules K562 , Kaempférols/pharmacologie , Protéines associées à la multirésistance aux médicaments/génétique , Protéines tumorales/génétique , ARN messager/métabolisme , Récepteurs à hydrocarbure aromatique/métabolisme , Dibenzodioxines polychlorées/pharmacologie , Régulation positive/effets des médicaments et des substances chimiques , Particules de Vault/génétique
3.
Journal of Korean Academy of Nursing ; : 722-730, 2003.
Article Dans Coréen | WPRIM | ID: wpr-207692

Résumé

PURPOSE: This study attempted to describe the essential structure of the lived experience of a students transferring into the nursing program. METHOD: The data was collected from 14 graduates and undergraduates who enrolled in nursing school as transfer students. The analysis of the data was made by phenominological analytic method suggested by Colaizzi(1978). RESULT: In this study, 6 essential themes were extracted: 'Constant anxiety of being a stranger', 'Feeling of constant burden', 'Thankfulness of a clinical practice group', 'Being supportive with each other between transferring students', 'Pleasure of studying a desired major', 'Feeling the responsibility of own choice of a new major'. CONCLUSION: With rapidly increasing number of transferring students, the significance of this study in the field of nursing is that by understanding the transferring experience of nursing students, it describes the need of systematic and emotional support for transferring students.

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