2005 Fiscal Year Final Research Report Summary
Tamoxifen activates CYP3A4 and MDR-1 genes through steroid and xenobiotic receptor in breast cancer cells.
Project/Area Number |
16591247
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
General surgery
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Research Institution | Gunma University |
Principal Investigator |
KOIBUCHI Yukio GUNMA UNIVERSITY, SCHOOL OF MEDICINE, DEPT.THRACIC AND VISCERAL ORGAN SURGERY, INVESTIGATOR, 医学部, 助手 (10323346)
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Co-Investigator(Kenkyū-buntansha) |
IINO Yuichi GUNMA UNIVERSITY, GRAD.SCHL.MED., DEPT.EMERGENCY MEDICINE, PROFESSOR, 医学系研究科, 教授 (50124649)
HORIGUCHI Jun , 医学部, 講師 (70272242)
KOIBUCHI Noriyuki GUNMA UNIVERSITY, GRAD.SCHL.MED., DEPT.INTEGRATIVE PHYSIOLOGY, PROFESSOR, 医学系研究科, 教授 (80234681)
IWASAKI Toshiharu GUNMA UNIVERSITY, GRAD.SCHL.MED., DEPT.INTEGRATIVE PHYSIOLOGY, ASSISTANT PROFESSOR, 医学系研究科, 講師 (80375576)
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Project Period (FY) |
2004 – 2005
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Keywords | TAMOXIFEN / SXR / HORMONAL THERAPY / CYTOCHROME P450 3A4 / BREAST CANCER / MDR-1 |
Research Abstract |
Cytochrome P450 monooxygenase 3A4 (CYP3A4) is responsible for the metabolism of endogenous steroids, prescribed drugs and xenobiotics. P-glycoprotein, encoded by multidrug resistance 1 (MDR1) gene, functions as an efflux pump transporting substances from inside of the intestinal cells to the lumen to be absorbed or eliminated. Both genes are regulated by steroid and xenobiotic receptor (SXR), a member of nuclear hormone receptor superfamily. Various endogeneous steroids and drugs function as ligands of SXR. Although CYP3A4, MDR1 and SXR are expressed mainly in the liver and the small intestine, these genes are also expressed in breast cancer cells such as MCF-7 cells. Since tamoxifen (TAM), an antiestrogen used for breast cancer treatment, may be involved in SXR-mediated transcription and is known to be metabolized by CYP3A4 and P-glycoprotein, we investigated the effect of TAM on these SXR targeted genes in breast cancer cell lines. Transient transfection-based reporter gene assays showed 4-hydroxy TAM as well as TAM activated the SXR-mediated transcription through CYP3A4 and MDR1 promoters in a ligand- and receptor concentration-dependent manner. We confirmed the binding of 4-hydroxy-TAM to SXR by ligand binding assay. Moreover, semi-quantitative RT-PCR studies revealed that 4-hydroxy TAM activated the expression of CYP3A4 and MDR1 mRNA in MCF-7 cells. These results suggest that TAM induces CYP3A4 and MDR1 gene expression through SXR, which reduces TAM concentration in breast cancer cells. Thus, the expression of SXR in breast cancer cells could be a potential risk factor, which may induce local TAM resistance.
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Research Products
(78 results)
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[Journal Article] Advanced gastric cancer with peritoneal dissemination successfully treated with paclitaxel and doxifluridine : a case report2005
Author(s)
Takeyoshi I, Iwanami K, Yamada T, Kawate S, Hamada K, Sunose Y, Yoshida M, Horiguchi J, Ohwada S, Sasaki A, Morishita Y
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Journal Title
Hepatogastroenterology 52
Pages: 322-325
Description
「研究成果報告書概要(和文)」より
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[Journal Article] HER2 陽性転移性乳癌に対する trastuzumab と paclitaxel併用療法の有用性の検討2005
Author(s)
吉田 崇, 堀口 淳, 鯉淵幸生, 狩野貴之, 飯島耕太郎, 菊地麻美, 高他大輔, 六反田奈和, 長岡りん, 佐藤亜矢子, 飯野佑一, 森下靖雄
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Journal Title
Description
「研究成果報告書概要(和文)」より
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[Journal Article] HER2 陽性転移性乳癌に対する trastuzumab 単独療法の有用性の検討2005
Author(s)
吉田 崇, 堀口 淳, 鯉淵幸生, 狩野貴之, 飯島耕太郎, 菊地麻美, 高他大輔, 長岡りん, 六反田奈和, 佐藤亜矢子, 飯野佑一, 森下靖雄
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Journal Title
Description
「研究成果報告書概要(和文)」より
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[Journal Article] A combination phase I study of weekly paclitaxel and doxifluridine in advanced gastric cancer patients2005
Author(s)
Takeyoshi I, Makita F, Tanahashi Y, Yokomori T, Iwazaki S, Kawashima Y, Iwanami K, Yamada T, Kawate S, Hamada K, Sunose Y, Yoshida M, Horiguchi J, Iesato H, Kobayashi M, Morishita Y
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Journal Title
Anticancer Res 25
Pages: 1291-1296
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Local control by breast-conserving surgery with nipple resection2005
Author(s)
Horiguchi J, Koibuchi Y, Iijima K, Yoshida T, Takata D, Rokutanda N, Nagaoka R, Oyama T, Iino Y, Sakurai H, Morishita Y
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Journal Title
Anticancer Res 25
Pages: 2957-2959
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Functional characterization of JMJD2A, a histone deacetylase- and retinoblastoma-binding protein2005
Author(s)
Gray SG, Iglesias AH, Lizcano F, Villanueva R, Camelo S, Jingu H, The BT, Koibuchi N, Chin WW, Kokkotou E, Dangond F
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Journal Title
J Biol Chem 280
Pages: 28507-18
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Functional characterization of JMJD2A, a histone deacetlyase- and retinoblastoma-binding protein2005
Author(s)
Grey SG, Iglesias AH, Lizcano F, Villanueva R, Camelo S, Jingu H, Teh BT, Koibuchi N, Chin WW, Kokkotou E, Dangond F
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Journal Title
J Biol Chem 280
Pages: 28507-28518
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Advanced gastric cancer with peritoneal dissemination successfully treated with paclitaxel and doxifluridine : a case report.2005
Author(s)
Takeyoshi I, Iwanami K, Yamada T, Kawate S, Hamada K, Sunose Y, Yoshida M, Horiguchi J, Ohwada S, Sasaki A, Morishita Y
-
Journal Title
Hepatogastroenterology 52
Pages: 322-325
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] A combination phase I study of weekly paclitaxel and doxifluridine in advanced gastric cancer patients.2005
Author(s)
Takeyoshi I, Makita F, Tanahashi Y, Yokomori T, Iwazaki S, Kawashima Y, Iwanami K, Yamada T, Kawate S, Hamada K, Sunose Y, Yoshida M, Horiguchi J, Iesato H, Kobayashi M, Morishita Y
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Journal Title
Anticancer Res 25
Pages: 1291-1296
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Local control by breast-conserving surgery with nipple resection.2005
Author(s)
Horiguchi J, Koibuchi Y, Iijima K, Yoshida T, Takata D, Rokutanda N, Nagaoka R, Oyama T, Iino Y, Sakurai H, Morishita Y
-
Journal Title
Anticancer Res 25
Pages: 2957-2959
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Functional characterization of JMJD2A, a histone deacetylase- and retinoblastoma-binding protein.2005
Author(s)
Gray SG, Iglesias AH, Lizcano F, Villanueva R, Camelo S, Jingu H, The BT, Koibuchi N, Chin WW, Kokkotou E, Dangond F
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Journal Title
J Biol Chem. 280
Pages: 28507-28518
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Functional characterization of JMJD2A, a histone deacetlyase- and retinoblastoma-binding protein.2005
Author(s)
Grey SG, Iglesias AH, Lizcano F, Villanueva R, Camelo S, Jingu H, Teh BT, Koibuchi N, Chin WW, Kokkotou E, Dangond F
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Journal Title
J Biol Chem 280
Pages: 28507-28518
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] 乳癌センチネルリンパ節生検-色素法と色素・RI併用法の比較検討-2004
Author(s)
堀口 淳, 鯉淵幸生, 吉田 崇, 飯島耕太郎, 高他大輔, 長岡りん, 六反田奈和, 小山徹也, 中島 孝, 織内 昇, 遠藤啓吾, 飯野佑一, 森下靖雄
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Journal Title
Kitakanto Med J 54
Pages: 105-108
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Metastatic breast cancer treated with trastuzumab and paclitaxel-a case report with clinically complete response2004
Author(s)
Yosida T, Horiguchi J, Koibuchi Y, Kanoh T, Iijima K, Yoshida M, Kikuchi M, TAkata D, Oyama T, Iino Y, Morishita Y
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Journal Title
Gan to Kagaku Ryoho 31
Pages: 907-910
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Metastatic breast cancer treated with trastuzumab and paclitaxel-a case report with clinically complete response.2004
Author(s)
Yosida T, Horiguchi J, Koibuchi Y, Kanoh T, Iijima K, Yoshida M, Kikuchi M, TAkata D, Oyama T, Iino Y, Morishita Y
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Journal Title
Gan to Kagaku Ryoho 31
Pages: 907-910
Description
「研究成果報告書概要(欧文)」より
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