Effect and Mechanism of Curcumin on EZH2 - miR-101 Regulatory Feedback Loop in Multiple Myeloma
Multiple myeloma is the second most prevalent hematologic malignancy and thought to be incurable. Therefore, it's urgent to find new drugs for treatment. Some experiments have shown that curcumin might have great potential in treating multiple myeloma, while the mechanism is still unknown. EZH2...
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Published in | Current pharmaceutical design Vol. 24; no. 5; p. 564 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
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United Arab Emirates
01.01.2018
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Abstract | Multiple myeloma is the second most prevalent hematologic malignancy and thought to be incurable. Therefore, it's urgent to find new drugs for treatment. Some experiments have shown that curcumin might have great potential in treating multiple myeloma, while the mechanism is still unknown. EZH2 and SUZ12 are the core proteins in PRC2 and their expressions are increased in various human cancers, including the poor prognostic multiple myeloma. Meanwhile, the regulation of miRNAs and EZH2 has been demonstrated in other cancer researches, like lung cancer, pancreatic cancer, leukemia and so on.
To reveal the mechanism behind the anti-tumor effect of cucurmin in multiple myeloma.
The effect of curcumin on the growth of MM cells was studied by MTT assay in the MM cell lines RPMI8226 and U266. Apoptosis was measured by Annexin V-FITC/PI double staining method. Western blotting, RT-PCR and luciferase activity assay were used to assess the expression of EZH2, SUZ12, miR-101 and downstream proteins such as E-cadherin, MMP9, c-Myc, cyclin D3, CDK4 and CDK6.
Curcumin could significantly inhibite the proliferation of MM cells in a time- and concentrationdependent manner. Curcumin induced apoptosis by inhibiting the expression of EZH2, and the apoptosis rates were 16.42% and 25.62% when the RPMI8226 cells incubated with 5 and 10 µmol/L of curcumin. For U266 cells, the apoptosis rates were 15.25% and 21.28%. The up-regulation of miR-101 led to the lower expression of EZH2. In adverse, the expression of EZH2 induced lower expression of miR-101. The down-stream proteins of miR-101 were regulated by curcumin and EZH2 at the same time.
Our experiments verified that the effect and mechanism of curcumin on multiple myeloma is via EZH2 - miR-101 regulatory feedback loop, which would lead us to a new way of investigating multiple myeloma and come up with new therapies in treating the disease. |
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AbstractList | Multiple myeloma is the second most prevalent hematologic malignancy and thought to be incurable. Therefore, it's urgent to find new drugs for treatment. Some experiments have shown that curcumin might have great potential in treating multiple myeloma, while the mechanism is still unknown. EZH2 and SUZ12 are the core proteins in PRC2 and their expressions are increased in various human cancers, including the poor prognostic multiple myeloma. Meanwhile, the regulation of miRNAs and EZH2 has been demonstrated in other cancer researches, like lung cancer, pancreatic cancer, leukemia and so on.
To reveal the mechanism behind the anti-tumor effect of cucurmin in multiple myeloma.
The effect of curcumin on the growth of MM cells was studied by MTT assay in the MM cell lines RPMI8226 and U266. Apoptosis was measured by Annexin V-FITC/PI double staining method. Western blotting, RT-PCR and luciferase activity assay were used to assess the expression of EZH2, SUZ12, miR-101 and downstream proteins such as E-cadherin, MMP9, c-Myc, cyclin D3, CDK4 and CDK6.
Curcumin could significantly inhibite the proliferation of MM cells in a time- and concentrationdependent manner. Curcumin induced apoptosis by inhibiting the expression of EZH2, and the apoptosis rates were 16.42% and 25.62% when the RPMI8226 cells incubated with 5 and 10 µmol/L of curcumin. For U266 cells, the apoptosis rates were 15.25% and 21.28%. The up-regulation of miR-101 led to the lower expression of EZH2. In adverse, the expression of EZH2 induced lower expression of miR-101. The down-stream proteins of miR-101 were regulated by curcumin and EZH2 at the same time.
Our experiments verified that the effect and mechanism of curcumin on multiple myeloma is via EZH2 - miR-101 regulatory feedback loop, which would lead us to a new way of investigating multiple myeloma and come up with new therapies in treating the disease. |
Author | Pan, Juan Zhang, Weikang Wu, Chuanqing Ruan, Tuo Tao, Kaixiong Zhang, Chun Liu, Weizhen Yan, Chen Zhu, Xiaojie Lu, Wen |
Author_xml | – sequence: 1 givenname: Chuanqing surname: Wu fullname: Wu, Chuanqing organization: Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China – sequence: 2 givenname: Tuo surname: Ruan fullname: Ruan, Tuo organization: Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China – sequence: 3 givenname: Weizhen surname: Liu fullname: Liu, Weizhen organization: Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China – sequence: 4 givenname: Xiaojie surname: Zhu fullname: Zhu, Xiaojie organization: Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China – sequence: 5 givenname: Juan surname: Pan fullname: Pan, Juan organization: Department of pathology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China – sequence: 6 givenname: Wen surname: Lu fullname: Lu, Wen organization: Department of Hematology, Union hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China – sequence: 7 givenname: Chen surname: Yan fullname: Yan, Chen organization: Department of Hematology, Union hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China – sequence: 8 givenname: Kaixiong surname: Tao fullname: Tao, Kaixiong organization: Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China – sequence: 9 givenname: Weikang surname: Zhang fullname: Zhang, Weikang organization: Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China – sequence: 10 givenname: Chun surname: Zhang fullname: Zhang, Chun organization: Department of Hematology, Union hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China |
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Keywords | SUZ12 multiple myeloma Curcumin PRC2 miR-101 EZH2 |
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Title | Effect and Mechanism of Curcumin on EZH2 - miR-101 Regulatory Feedback Loop in Multiple Myeloma |
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