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Jang HJ, Yoon YJ, Choi J, Lee YJ, Lee S, Cho W, Byun WG, Park SB, Han DC, Kwon BM. S-Benproperine, an Active Stereoisomer of Benproperine, Suppresses Cancer Migration and Tumor Metastasis by Targeting ARPC2. Pharmaceuticals (Basel) 2022; 15:ph15121462. [PMID: 36558913 PMCID: PMC9785746 DOI: 10.3390/ph15121462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/19/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
Metastasis, in which cancer cells migrate to other tissues and form new tumors, is a major cause of both cancer death and treatment failure. In a previous study, benproperine (Benp) was identified as a cancer cell migration inhibitor and an inhibitor of actin-related protein 2/3 complex subunit 2 (ARPC2). However, Benp is a racemic mixture, and which stereoisomer is the active isomer remains unclear. In this study, we found that S-Benp is an active isomer and inhibits the migration and invasion of cancer cells much more strongly than R-Benp, with no effect on normal cells. The metastasis inhibitory effect of S-Benp was also verified in an animal model. Validating that inhibitors bind to their targets in cells and tissues has been a very challenging task in drug discovery. The direct interactions between ARPC2 and S-Benp were verified by surface plasmon resonance analysis (SPR), a cellular thermal shift assay (CETSA), and drug affinity responsive target stability (DARTS). In the mutant study with ARPC2F225A cells, S-Benp did not bind to ARPC2F225A according to CETSA and DARTS. Furthermore, we validated that S-Benp colocalized with ARPC2 in cancer cells and directly bound to ARPC2 in tumor tissues using Cy3-conjugated S-Benp according to CETSA. Finally, actin polymerization assays and immunocytochemistry showed that S-Benp suppressed actin remodeling such as lamellipodium formation. Taken together, our data suggest that S-Benp is an active stereoisomer of Benp and a potential metastasis inhibitor via ARPC2 binding.
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Affiliation(s)
- Hyun-Jin Jang
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Yae Jin Yoon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Jiyeon Choi
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Yu-Jin Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Sangku Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Wansang Cho
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Wan Gi Byun
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Seung Bum Park
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
- KRIBB School of Bioscience, University of Science and Technology in Korea, 217 Gajeongro, Daejeon 34113, Republic of Korea
- Correspondence: (D.C.H.); (B.-M.K.)
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
- Central Research Institute, VS Pharm Tech Co., Ltd., Daejeon 35209, Republic of Korea
- Correspondence: (D.C.H.); (B.-M.K.)
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Yun S, Lee YJ, Choi J, Kim ND, Han DC, Kwon BM. Acacetin Inhibits the Growth of STAT3-Activated DU145 Prostate Cancer Cells by Directly Binding to Signal Transducer and Activator of Transcription 3 (STAT3). Molecules 2021; 26:molecules26206204. [PMID: 34684783 PMCID: PMC8540902 DOI: 10.3390/molecules26206204] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/24/2021] [Accepted: 10/12/2021] [Indexed: 11/16/2022] Open
Abstract
Signal transducer and activator of transcription 3 (STAT3) plays a critical role in the formation and growth of human cancer. Therefore, STAT3 is a therapeutic target for cancer drug discovery. Acacetin, a flavone present in various plants, inhibits constitutive and inducible STAT3 activation in STAT3-activated DU145 prostate cancer cells. Acacetin inhibits STAT3 activity by directly binding to STAT3, which we confirmed by a pull-down assay with a biotinylated compound and two level-free methods, namely, a drug affinity responsive target stability (DARTS) experiment and a cellular thermal shift assay (CETSA). Acacetin inhibits STAT3 phosphorylation at the tyrosine 705 residue and nuclear translocation in DU145 cells, which leads to the downregulation of STAT3 target genes. Acacetin then induces apoptosis in a time-dependent manner. Interestingly, acacetin induces the production of reactive oxygen species (ROS) that are not involved in the acacetin-induced inhibition of STAT3 activation because the suppressed p-STAT3 level is not rescued by treatment with GSH or NAC, which are general ROS inhibitors. We also found that acacetin inhibits tumor growth in xenografted nude mice. These results suggest that acacetin, as a STAT3 inhibitor, could be a possible drug candidate for targeting STAT3 for the treatment of cancer in humans.
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Affiliation(s)
- Sun Yun
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Korea; (S.Y.); (Y.-J.L.); (J.C.)
- KRIBB School of Bioscience, University of Science and Technology in Korea, Daejeon 34113, Korea
| | - Yu-Jin Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Korea; (S.Y.); (Y.-J.L.); (J.C.)
| | - Jiyeon Choi
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Korea; (S.Y.); (Y.-J.L.); (J.C.)
| | - Nam Doo Kim
- VORONOIBIO Inc., S 11th F, Thechnopark IT Center Songdo Kwahak-ro 32, Incheon 21984, Korea;
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Korea; (S.Y.); (Y.-J.L.); (J.C.)
- KRIBB School of Bioscience, University of Science and Technology in Korea, Daejeon 34113, Korea
- Correspondence: (D.C.H.); (B.-M.K); Tel.: +82-42-860-4557 (B.-M.K.)
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Korea; (S.Y.); (Y.-J.L.); (J.C.)
- KRIBB School of Bioscience, University of Science and Technology in Korea, Daejeon 34113, Korea
- Correspondence: (D.C.H.); (B.-M.K); Tel.: +82-42-860-4557 (B.-M.K.)
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Lee YJ, Choi J, Yoon YJ, Sim Y, Ryu HW, Oh SR, Kim DY, Hwang J, Chi SW, Han DC, Kwon BM. 8-Epi-xanthatin induces the apoptosis of DU145 prostate carcinoma cells through signal transducer and activator of transcription 3 inhibition and reactive oxygen species generation. Phytother Res 2020; 35:1508-1520. [PMID: 33164240 DOI: 10.1002/ptr.6918] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/11/2020] [Accepted: 10/01/2020] [Indexed: 12/15/2022]
Abstract
Signal transducer and activator of transcription 3 (STAT3) is aberrantly activated in many human cancers. We tried to find STAT3 inhibitors from natural sources and found that Xanthium fruit extracts decreased phosphorylation of STAT3-Y705. 8-Epi-xanthatin (EXT) was isolated from the extracts. When DU145 cancer cells were treated with EXT, p-STAT3-Y705 was decreased with an IC50 of 3.2 μM. EXT decreased the expression of STAT3 target genes, such as cyclin A, cyclin D1, and BCL-2, and induced PARP cleavage, indicating apoptotic cell death. Downregulation of EXT-induced p-STAT3-Y705 was rescued by pretreating DU145 cells with antioxidants, such as N-acetyl-L-cysteine (NAC), indicating that reactive oxygen species (ROS) were involved in the EXT-induced inhibition of STAT3 activation. Furthermore, we proved the association of EXT with STAT3 protein by using a drug affinity responsive target stability (DARTS) assay and a cellular thermal shift assay (CETSA). EXT inhibited proliferation of DU145 cells with a GI50 of 6 μM and reduced tumor growth in mice xenografted with DU145 cells. Immunoblotting showed that phosphorylation of STAT3-Y705 was lower in EXT-treated tumor tissue than in control tissues. Collectively, we found that EXT binds to, and inhibits, STAT3 activation and could be a lead compound for anticancer therapy.
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Affiliation(s)
- Yu-Jin Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - Jiyeon Choi
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - Yae Jin Yoon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - Yugyeong Sim
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea.,University of Science and Technology in Korea, Daejeon
| | - Hyung Won Ryu
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju, South Korea
| | - Sei-Ryang Oh
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju, South Korea
| | - Doo-Young Kim
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju, South Korea
| | - Jihyun Hwang
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - Seung-Wook Chi
- University of Science and Technology in Korea, Daejeon.,Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea.,University of Science and Technology in Korea, Daejeon
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea.,University of Science and Technology in Korea, Daejeon
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Lee YJ, Song H, Yoon YJ, Park SJ, Kim SY, Cho Han D, Kwon BM. Ethacrynic acid inhibits STAT3 activity through the modulation of SHP2 and PTP1B tyrosine phosphatases in DU145 prostate carcinoma cells. Biochem Pharmacol 2020; 175:113920. [DOI: 10.1016/j.bcp.2020.113920] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 03/17/2020] [Indexed: 01/17/2023]
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Choi J, Lee YJ, Yoon YJ, Kim CH, Park SJ, Kim SY, Doo Kim N, Cho Han D, Kwon BM. Pimozide suppresses cancer cell migration and tumor metastasis through binding to ARPC2, a subunit of the Arp2/3 complex. Cancer Sci 2019; 110:3788-3801. [PMID: 31571309 PMCID: PMC6890432 DOI: 10.1111/cas.14205] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 09/18/2019] [Accepted: 09/26/2019] [Indexed: 12/14/2022] Open
Abstract
ARPC2 is a subunit of the Arp2/3 complex, which is essential for lamellipodia, invadopodia and filopodia, and ARPC2 has been identified as a migrastatic target molecule. To identify ARPC2 inhibitors, we generated an ARPC2 knockout DLD-1 human colon cancer cell line using the clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9 (CRISPR/Cas9) system and explored gene signature-based strategies, such as a connectivity map (CMap) using the gene expression profiling data of ARPC2 knockout and knockdown cells. From the CMap-based drug discovery strategy, we identified pimozide (a clinically used antipsychotic drug) as a migrastatic drug and ARPC2 inhibitor. Pimozide inhibited the migration and invasion of various cancer cells. Through drug affinity responsive target stability (DARTS) analysis and cellular thermal shift assay (CETSA), it was confirmed that pimozide directly binds to ARPC2. Pimozide increased the lag phase of Arp2/3 complex-dependent actin polymerization and inhibited the vinculin-mediated recruitment of ARPC2 to focal adhesions in cancer cells. To validate the likely binding of pimozide to ARPC2, mutant cells, including ARPC2F225A , ARPC2F247A and ARPC2Y250F cells, were prepared using ARPC2 knockout cells prepared by gene-editing technology. Pimozide strongly inhibited the migration of mutant cells because the mutated ARPC2 likely has a larger binding pocket than the wild-type ARPC2. Therefore, pimozide is a potential ARPC2 inhibitor, and ARPC2 is a new molecular target. Taken together, the results of the present study provide new insights into the molecular mechanism and target that are responsible for the antitumor and antimetastatic activity of pimozide.
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Affiliation(s)
- Jiyeon Choi
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea.,Department of Bioscience and Biotechnology, Chungnam National University, Daejeon, Korea
| | - Yu-Jin Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
| | - Yae Jin Yoon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
| | - Cheol-Hee Kim
- Department of Bioscience and Biotechnology, Chungnam National University, Daejeon, Korea
| | - Seung-Jin Park
- Korea Research Institute of Bioscience and Biotechnology, Personalized Genomic Medicine Research Center, Daejeon, Korea.,University of Science and Technology, Daejeon, Korea
| | - Seon-Young Kim
- Korea Research Institute of Bioscience and Biotechnology, Personalized Genomic Medicine Research Center, Daejeon, Korea.,University of Science and Technology, Daejeon, Korea
| | - Nam Doo Kim
- Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Korea
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea.,University of Science and Technology, Daejeon, Korea
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea.,University of Science and Technology, Daejeon, Korea
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Yoon YJ, Han YM, Choi J, Lee YJ, Yun J, Lee SK, Lee CW, Kang JS, Chi SW, Moon JH, Lee S, Han DC, Kwon BM. Benproperine, an ARPC2 inhibitor, suppresses cancer cell migration and tumor metastasis. Biochem Pharmacol 2019; 163:46-59. [PMID: 30710516 DOI: 10.1016/j.bcp.2019.01.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 01/24/2019] [Indexed: 02/09/2023]
Abstract
Metastasis is the leading cause of cancer mortality and cancer cell migration is an essential stage of metastasis. We identified benproperine (Benp, a clinically used antitussive drug) as an inhibitor of cancer cell migration and an anti-metastatic agent. Benp selectively inhibited cancer cell migration and invasion, which also suppressed metastasis of cancer cells in animal models. Actin-related protein 2/3 complex subunit 2 (ARPC2) was identified as a molecular target of Benp by affinity column chromatography with Benp-tagged Sepharose beads. Benp bound directly to ARPC2 in cells, which was validated by pull-down assay using Benp-biotin and label-free biochemical methods such as the drug affinity responsive target stability (DARTS) and cellular thermal shift assay (CETSA). Benp inhibited Arp2/3 function, showing disruption of lamellipodial structure and inhibition of actin polymerization. Unlike Arp2/3 inhibitors, Benp selectively inhibited the migration of cancer cells but not normal cells. ARPC2-knockdown cancer cells showed defective cell migration and suppressed metastasis in an animal model. Therefore, ARPC2 is a potential target for anti-metastatic therapy, and Benp has the clinical potential to block metastasis. Furthermore, Benp is a useful agent for studying the functions of the Arp2/3 complex in cancer cell migration and metastasis.
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Affiliation(s)
- Yae Jin Yoon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Young-Min Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Jiyeon Choi
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea; Department of Biology, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Yu-Jin Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Jieun Yun
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Su-Kyung Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Chang Woo Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Jong Soon Kang
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Seung-Wook Chi
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea; Korea University of Science and Technology in Korea, Daejeon, Republic of Korea
| | - Jeong Hee Moon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Sangku Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea; Korea University of Science and Technology in Korea, Daejeon, Republic of Korea.
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Daejeon 34141, Republic of Korea; Korea University of Science and Technology in Korea, Daejeon, Republic of Korea.
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Yoon YJ, Kim YH, Lee YJ, Choi J, Kim CH, Han DC, Kwon BM. 2'-Hydroxycinnamaldehyde inhibits proliferation and induces apoptosis via signal transducer and activator of transcription 3 inactivation and reactive oxygen species generation. Cancer Sci 2018; 110:366-378. [PMID: 30375708 PMCID: PMC6317917 DOI: 10.1111/cas.13852] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/18/2018] [Accepted: 10/23/2018] [Indexed: 12/25/2022] Open
Abstract
Inhibition of the signal transducer and activator of transcription 3 (STAT3) signaling pathway is a novel therapeutic strategy to treat human cancers with constitutively active STAT3. During the screening of natural products to find STAT3 inhibitors, we identified 2′‐hydroxycinnamaldehyde (HCA) as a STAT3 inhibitor, which was isolated from the stem bark of Cinnamomum cassia. In this study, we found that HCA inhibited constitutive and inducible STAT3 activation in STAT3‐activated DU145 prostate cancer cells. HCA selectively inhibited the STAT3 activity by direct binding to STAT3, which was confirmed by biochemical methods, including a pull‐down assay with biotin‐conjugated HCA, a drug affinity responsive target stability (DARTS) experiment and a cellular thermal shift assay (CETSA). HCA inhibited STAT3 phosphorylation at the tyrosine 705 residue, dimer formation, and nuclear translocation in DU145 cells, which led to a downregulation of STAT3 target genes. The downregulation of cell cycle progression and antiapoptosis‐related gene expression by HCA induced the accumulation of cells in the G0/G1 phase of the cell cycle and then induced apoptosis. We also found that reactive oxygen species (ROS) were involved in the HCA‐induced inhibition of STAT3 activation and cell proliferation because the suppressed p‐STAT3 level was rescued by glutathione or N‐acetyl‐L‐cysteine treatment, which are general ROS inhibitors. These results suggest that HCA could be a potent anticancer agent targeting STAT3‐activated tumor cells.
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Affiliation(s)
- Yae Jin Yoon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
| | - Young-Hwan Kim
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea.,Department of Biology, Chungnam National University, Daejeon, Korea
| | - Yu-Jin Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
| | - Jiyeon Choi
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea.,Department of Biology, Chungnam National University, Daejeon, Korea
| | - Cheol-Hee Kim
- Department of Biology, Chungnam National University, Daejeon, Korea
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea.,Korea University of Science and Technology in Korea, Daejeon, Korea
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea.,Korea University of Science and Technology in Korea, Daejeon, Korea
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Liu Y, Han DC, Hu YL, Chen LM, Li JC, Su YW, Hu CX. [Diagnosis and treatment of five neonatal cerebral venous sinus thrombosis]. Zhonghua Er Ke Za Zhi 2018; 56:765-768. [PMID: 30293281 DOI: 10.3760/cma.j.issn.0578-1310.2018.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To summarize the clinical presentations and imaging features of cerebral venous sinus thrombosis (CVST) in 5 newborns. Methods: The clinical data of 5 newborns with CVST admitted to Department of Neonatology of Maternal and Children Hospital of Hubei Province from February 2017 to April 2018 were analyzed retrospectively. The risk factors, clinical presentations, imaging manifestations and treatment of CVST were investigated. Results: Of the 5 full term neonates, 4 were males and 1 female, with 4 aged less than 7 days and 1 more than 7 days; one with the history of maternal gestational diabetes mellitus, one with maternal gestational hypertension. The clinical presentations included seizures (3 cases), fever (3 cases), dehydration (1 cases), lethargy (2 cases), hypoglycemia (2 cases), thrombocytopenia (2 cases). Electroencephalogram (EEG) showed electrical seizures in 3 cases. Magnetic resonance imaging (MRI) and magnetic resonance venography (MRV) showed 4 cases of intracranial hemorrhage, 3 cases of cerebral parenchymal infarction. For the sites of the thrombi, 4 were in the superior sagittal sinus, 3 in straight sinus, 2 in transverse sinus and 1 in sinus confluence. CT showed intracranial hemorrhage in 2 cases and venous sinus dilatation in 2 cases. Doppler ultrasound showed 2 cases of intraventricular hemorrhage and 2 cases of changes of venous sinus blood flow. Three neonates were treated with anticoagulant and thrombolytic therapy, followed by recanalization of the veins and discontinuing of seizures. Conclusions: Seizure is the main clinical presentation of CVST. The main radiologic manifestations are cerebral infarction and hemorrhage. Timely brain MRI and MRV are helpful in the early diagnosis and treatment of CVST.
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Affiliation(s)
- Y Liu
- Department of Neonatology, Maternal and Children Hospital of Hubei Province, Wuhan 430070, China
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Yoon YJ, Kim YH, Jin Y, Chi SW, Moon JH, Han DC, Kwon BM. 2′-hydroxycinnamaldehyde inhibits cancer cell proliferation and tumor growth by targeting the pyruvate kinase M2. Cancer Lett 2018; 434:42-55. [DOI: 10.1016/j.canlet.2018.07.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 06/20/2018] [Accepted: 07/09/2018] [Indexed: 12/29/2022]
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Kim YH, Yoon YJ, Lee YJ, Kim CH, Lee S, Choung DH, Han DC, Kwon BM. Piperlongumine derivative, CG-06, inhibits STAT3 activity by direct binding to STAT3 and regulating the reactive oxygen species in DU145 prostate carcinoma cells. Bioorg Med Chem Lett 2018; 28:2566-2572. [PMID: 29807795 DOI: 10.1016/j.bmcl.2018.05.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/11/2018] [Accepted: 05/12/2018] [Indexed: 12/15/2022]
Abstract
Piperlongumine (PL), isolated from Piper longum L., is receiving intense interest due to its selectively ability to kill cancer cells but not normal cells. We synthesized a number of analogues by replacing the cyclic amide of PL with aliphatic amides to explore structural diversity. Compound CG-06 had the strongest cytotoxic profile of this series, showing potent effects in human prostate cancer DU-145 cells, in which signal transducer and activator of transcription 3 (STAT3) is constitutively active. CG-06 inhibited STAT3 phosphorylation at tyrosine 705 in a dose- and time dependent manner in DU-145 cells and suppressed IL-6-induced STAT3 phosphorylation at Tyr-705 in DU-145 and LNCaP cell lines. CG-06 decreased the expression levels of STAT3 target genes, such as cyclin A, Bcl-2, and survivin. Notably, we used drug affinity responsive target stability (DARTS) to show that CG-06 binds directly to STAT3, and the reactive oxygen species (ROS) scavenger N-acetyl cysteine (NAC) rescued the CG-06-induced suppression p-STAT3. Our results suggest that CG-06 is a novel inhibitor of STAT3 and may be a useful lead molecule for the development of a therapeutic STAT3 inhibitor.
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Affiliation(s)
- Young Hwan Kim
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea; Department of Biology, Chungnam National University, Daejeon, Republic of Korea
| | - Yae Jin Yoon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Yu-Jin Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Cheol-Hee Kim
- Department of Biology, Chungnam National University, Daejeon, Republic of Korea
| | - Sangku Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Dong Ho Choung
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea; Korea University of Science and Technology, Daejeon, Republic of Korea.
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea; Korea University of Science and Technology, Daejeon, Republic of Korea.
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Jung J, Kim Y, Song J, Yoon YJ, Kim DE, Kim JA, Jin Y, Lee YJ, Kim S, Kwon BM, Han DC. KRIBB53 binds to OCT4 and enhances its degradation through the proteasome, causing apoptotic cell death of OCT4-positive testicular germ cell tumors. Carcinogenesis 2018; 39:838-849. [DOI: 10.1093/carcin/bgy054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 04/11/2018] [Indexed: 12/20/2022] Open
Affiliation(s)
- Jiyae Jung
- Personalized Genomic Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
- University of Science and Technology in Korea, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
| | - Youngmi Kim
- Personalized Genomic Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
- University of Science and Technology in Korea, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
| | - Jinhoi Song
- University of Science and Technology in Korea, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
| | - Yae Jin Yoon
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
| | - Da-Eun Kim
- Personalized Genomic Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
- University of Science and Technology in Korea, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
| | - Joo Ae Kim
- Personalized Genomic Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
- University of Science and Technology in Korea, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
| | - Yena Jin
- University of Science and Technology in Korea, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
| | - Yu-Jin Lee
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
| | - Seokho Kim
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
| | - Byoung-Mog Kwon
- University of Science and Technology in Korea, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
| | - Dong Cho Han
- Personalized Genomic Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
- University of Science and Technology in Korea, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Korea
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Jin Y, Kim YH, Park JY, Lee YJ, Oh HM, Choi SK, Han DC, Kwon BM. Methyllucidone inhibits STAT3 activity by regulating the expression of the protein tyrosine phosphatase MEG2 in DU145 prostate carcinoma cells. Bioorg Med Chem Lett 2018; 28:853-857. [PMID: 29456111 DOI: 10.1016/j.bmcl.2018.02.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 02/06/2018] [Accepted: 02/07/2018] [Indexed: 01/13/2023]
Abstract
During the search for signal transducer and activator of transcription 3 (STAT3) inhibitors from natural products, methyllucidone, isolated from Lindera species (Lauraceae), was identified as a STAT3 inhibitor. Methyllucidone inhibited STAT3 phosphorylation at tyrosine 705 in a dose- and time dependent manner in DU145 prostate cancer cells and suppressed IL-6-induced STAT3 phosphorylation at Tyr-705 in LNCaP cells. Methyllucidone decreased the expression levels of STAT3 target genes, such as cyclin D1, cyclin A, Bcl-2, Mcl-1, and survivin. Methyllucidone inhibited DU145 cell growth and induced apoptosis by arresting the cell cycle at G1 phase. Notably, knockdown of the MEG2 gene by small interfering RNA suppressed the ability of methyllucidone to inhibit STAT3 activation. Methyllucidone regulates STAT3 activity by modulating MEG2 expression, and our results suggest that this compound is a novel inhibitor of the STAT3 pathway and may be a useful lead molecule for the development of a therapeutic STAT3 inhibitor.
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Affiliation(s)
- Yena Jin
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea; Korea University of Science and Technology, Daejeon, Republic of Korea
| | - Young Hwan Kim
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea; Department of Biology, Chungnam National University, Daejeon, Republic of Korea
| | - Jin Yong Park
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea; Korea University of Science and Technology, Daejeon, Republic of Korea
| | - Yu-Jin Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Hyun-Mi Oh
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Sung-Kyu Choi
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea; Korea University of Science and Technology, Daejeon, Republic of Korea.
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea; Korea University of Science and Technology, Daejeon, Republic of Korea.
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13
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Jin Y, Yoon YJ, Jeon YJ, Choi J, Lee YJ, Lee J, Choi S, Nash O, Han DC, Kwon BM. Geranylnaringenin (CG902) inhibits constitutive and inducible STAT3 activation through the activation of SHP-2 tyrosine phosphatase. Biochem Pharmacol 2017; 142:46-57. [DOI: 10.1016/j.bcp.2017.06.131] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 06/23/2017] [Indexed: 12/19/2022]
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14
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Lee YJ, Kang YR, Lee SY, Jin Y, Han DC, Kwon BM. Ginkgetin induces G2-phase arrest in HCT116 colon cancer cells through the modulation of b‑Myb and miRNA34a expression. Int J Oncol 2017; 51:1331-1342. [PMID: 28902363 DOI: 10.3892/ijo.2017.4116] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 07/26/2017] [Indexed: 11/06/2022] Open
Abstract
Ginkgetin has been reported to display antitumor activity. However, the relevant pathway integrating cell cycle regulation and signaling pathways involved in growth inhibition in CRC cells remains to be identified. In this study, ginkgetin-treated HCT116 CRC cells exhibited significant dose-dependent growth inhibition with a GI50 value of 4.0 µM for 48-h treatment, together with apoptosis, via G2-phase cell cycle arrest. When HCT116 cells were treated with 10 µM ginkgetin for 48 h, the percentage of cells in G2/M phase increased by 2.2-fold (43.25%) versus the untreated control (19.69%). Ginkgetin regulated the expression of genes that are critically involved in G2 phase arrest cells, such as b‑Myb, CDC2 and cyclin B1. Furthermore, we found that the suppression of b‑Myb expression by ginkgetin was rescued ~5.1-fold by treatment with a miR-34a inhibitor (500 nM) and b‑Myb was downregulated by >80% by 100 nM miR‑34a mimic. These data suggest that the miRNA34a/b‑Myb/cyclin B1 cascade plays a critical role in ginkgetin-induced G2 cell cycle arrest, as well as in the inhibition of HCT116 cell proliferation. Moreover, the administration of ginkgetin (10 mg/kg) reduced tumor volumes by 36.5% and tumor weight by 37.6% in the mice xenografted with HCT116 cells relative to their vehicle-treated counterparts. Therefore, ginkgetin is the first compound shown to regulate b‑Myb by modulating miR-34a, and we suggest the use of ginkgetin as an inducer of G2 arrest for the treatment of CRC.
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Affiliation(s)
- Yu-Jin Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Yeong-Rim Kang
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - So Young Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Yena Jin
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
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15
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Kim J, Lee YJ, Kim JM, Lee SY, Bae MA, Ahn JH, Han DC, Kwon BM. PPARγ agonists induce adipocyte differentiation by modulating the expression of Lipin-1, which acts as a PPARγ phosphatase. Int J Biochem Cell Biol 2016; 81:57-66. [PMID: 27780754 DOI: 10.1016/j.biocel.2016.10.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 09/28/2016] [Accepted: 10/21/2016] [Indexed: 11/20/2022]
Abstract
PPARγ agonists induced obesity in animal models as a side effect. Microarray experiments reveal that PPARγ agonist upregulates the expression of lipin-1 and this upregulation is correlated with the activity of the agonists. Lipin-1 induced by PPARγ agonists decreased the levels of PPARγ and ERK1/2 phosphorylation through direct interaction with these proteins in 3T3-L1 cells. In PPARγ agonist-treated 3T3-L1 preadipocytes, the knockdown of lipin-1 expression by small interfering RNA inhibited the adipogenesis that was induced by PPARγ agonists. In contrast, PPARγ2 expression was increased, and lipid droplets were accumulated in lipin-1-overexpressing 3T3-L1 adipocytes. Rosiglitazone (RGZ), a strong PPARγ agonist, synergistically promoted PPARγ dephosphorylation and adipogenesis in lipin-1-overexpressing 3T3-L1 preadipocytes. Therefore, lipin-1 has dual functions as a transcriptional cofactor and phosphatidate phosphatase (PAP) in the differentiation of preadipocyte cells induced by strong PPARγ agonists. In addition, the adipogenesis of 3T3-L1 cells was markedly upregulated by diacylglycerol (DAG), which was produced by lipin-1. Therefore, lipin-1 induction by PPARγ agonists might be an important factor in understanding the biological mechanism of the agonists' adverse effects, and this information may be valuable in the development of type-2 diabetes mellitus (T2DM) therapeutics with reduced adverse effects and greater tolerability.
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Affiliation(s)
- Jina Kim
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - Yu-Jin Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea; University of Science and Technology in Korea, Republic of Korea
| | - Jung Min Kim
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - So Young Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - Myung-Ae Bae
- Korea Research Institute of Chemical Technology, Daejeon, 34114, Republic of Korea
| | - Jin Hee Ahn
- Korea Research Institute of Chemical Technology, Daejeon, 34114, Republic of Korea
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea; University of Science and Technology in Korea, Republic of Korea
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea; University of Science and Technology in Korea, Republic of Korea.
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16
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Hong SH, Ismail IA, Kang SM, Han DC, Kwon BM. Cinnamaldehydes in Cancer Chemotherapy. Phytother Res 2016; 30:754-67. [PMID: 26890810 DOI: 10.1002/ptr.5592] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 01/15/2016] [Accepted: 01/22/2016] [Indexed: 12/16/2022]
Abstract
Cinnamaldehyde and cinnamaldehyde-derived compounds are candidates for the development of anticancer drugs that have received extensive research attention. In this review, we summarize recent findings detailing the positive and negative aspects of cinnamaldehyde and its derivatives as potential anticancer drug candidates. Furthermore, we describe the in vivo pharmacokinetics and metabolism of cinnamaldehydes. The oxidative and antioxidative properties of cinnamaldehydes, which contribute to their potential in chemotherapy, have also been discussed. Moreover, the mechanism(s) by which cinnamaldehydes induce apoptosis in cancer cells have been explored. In addition, evidence of the regulatory effects of cinnamaldehydes on cancer cell invasion and metastasis has been described. Finally, the application of cinnamaldehydes in treating various types of cancer, including breast, prostate, and colon cancers, has been discussed in detail. The effects of cinnamaldehydes on leukemia, hepatocellular carcinoma, and oral cancer have been summarized briefly. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Su-Hyung Hong
- Department of Oral Microbiology and Immunology, School of Dentistry, Kyungpook National University, Daegu, 700-412, Korea
| | - Ismail Ahmed Ismail
- Department of Oral Microbiology and Immunology, School of Dentistry, Kyungpook National University, Daegu, 700-412, Korea.,Laboratory of Molecular Cell Biology, Department of Zoology, Faculty of Science, Assiut University, Assiut, 71516, Egypt
| | - Sung-Min Kang
- Department of Oral Microbiology and Immunology, School of Dentistry, Kyungpook National University, Daegu, 700-412, Korea
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology in Korea, 125 Gwahakro Yoosunggu, Daejeon, 305-806, Korea
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology in Korea, 125 Gwahakro Yoosunggu, Daejeon, 305-806, Korea
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17
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Jung SN, Shin DS, Kim HN, Jeon YJ, Yun J, Lee YJ, Kang JS, Han DC, Kwon BM. Sugiol inhibits STAT3 activity via regulation of transketolase and ROS-mediated ERK activation in DU145 prostate carcinoma cells. Biochem Pharmacol 2015. [DOI: 10.1016/j.bcp.2015.06.033] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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18
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Jeon YJ, Jung SN, Yun J, Lee CW, Choi J, Lee YJ, Han DC, Kwon BM. Ginkgetin inhibits the growth of DU-145 prostate cancer cells through inhibition of signal transducer and activator of transcription 3 activity. Cancer Sci 2015; 106:413-20. [PMID: 25611086 PMCID: PMC4409885 DOI: 10.1111/cas.12608] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 01/07/2015] [Accepted: 01/09/2015] [Indexed: 12/26/2022] Open
Abstract
Signal transducer and activator of transcription 3 (STAT3) is constitutively activated in human cancers. Therefore, STAT3 is a therapeutic target of cancer drug discovery. We previously reported that natural products inhibited constitutively activated STAT3 in human prostate tumor cells. We used a dual-luciferase assay to screen 200 natural products isolated from herbal medicines and we identified ginkgetin obtained from the leaves of Ginkgo biloba L. as a STAT3 inhibitor. Ginkgetin inhibited both inducible and constitutively activated STAT3 and blocked the nuclear translocation of p-STAT3 in DU-145 prostate cancer cells. Furthermore, ginkgetin selectively inhibited the growth of prostate tumor cells stimulated with activated STAT3. Ginkgetin induced STAT3 dephosphorylation at Try705 and inhibited its localization to the nucleus, leading to the inhibition of expression of STAT3 target genes such as cell survival-related genes (cyclin D1 and survivin) and anti-apoptotic proteins (Bcl-2 and Bcl-xL). Therefore, ginkgetin inhibited the growth of STAT3-activated tumor cells. We also found that ginkgetin inhibited tumor growth in xenografted nude mice and downregulated p-STAT3(Tyr705) and survivin in tumor tissues. This is the first report that ginkgetin exerts antitumor activity by inhibiting STAT3. Therefore, ginkgetin is a good STAT3 inhibitor and may be a useful lead molecule for development of a therapeutic STAT3 inhibitor.
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Affiliation(s)
- Yoon Jung Jeon
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea; Korea University of Science and Technology, Daejeon, Korea
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19
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Jeon YJ, Jung SN, Chang H, Yun J, Lee CW, Lee J, Choi S, Nash O, Han DC, Kwon BM. Artocarpus altilis(Parkinson) Fosberg Extracts and Geranyl Dihydrochalcone Inhibit STAT3 Activity in Prostate Cancer DU145 Cells. Phytother Res 2015; 29:749-56. [DOI: 10.1002/ptr.5311] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 01/02/2015] [Accepted: 01/25/2015] [Indexed: 12/21/2022]
Affiliation(s)
- Yoon Jung Jeon
- Laboratory of Chemical Biology and Genomics; Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology; 125 Gwahakro Yoosunggu Daejeon 305-600 Republic of Korea
| | - Seung-Nam Jung
- Laboratory of Chemical Biology and Genomics; Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology; 125 Gwahakro Yoosunggu Daejeon 305-600 Republic of Korea
| | - Hyeyoun Chang
- Laboratory of Chemical Biology and Genomics; Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology; 125 Gwahakro Yoosunggu Daejeon 305-600 Republic of Korea
| | - Jieun Yun
- Bio-Evaluation Center; Korea Research Institute of Bioscience and Biotechnology; Daejeon Republic of Korea
| | - Chang Woo Lee
- Bio-Evaluation Center; Korea Research Institute of Bioscience and Biotechnology; Daejeon Republic of Korea
| | - Joonku Lee
- International Biological Material Research Center, Korea Research Institute of Bioscience and Biotechnology; Daejeon Republic of Korea
| | - Sangho Choi
- International Biological Material Research Center, Korea Research Institute of Bioscience and Biotechnology; Daejeon Republic of Korea
| | - Oyekanmi Nash
- Institute for Advanced Medical Research and Training, College of Medicine; University of Ibadan; Ibadan Nigeria
| | - Dong Cho Han
- Laboratory of Chemical Biology and Genomics; Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology; 125 Gwahakro Yoosunggu Daejeon 305-600 Republic of Korea
| | - Byoung-Mog Kwon
- Laboratory of Chemical Biology and Genomics; Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology; 125 Gwahakro Yoosunggu Daejeon 305-600 Republic of Korea
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Kim JA, Kim Y, Kwon BM, Han DC. The natural compound cantharidin induces cancer cell death through inhibition of heat shock protein 70 (HSP70) and Bcl-2-associated athanogene domain 3 (BAG3) expression by blocking heat shock factor 1 (HSF1) binding to promoters. J Biol Chem 2013; 288:28713-26. [PMID: 23983126 DOI: 10.1074/jbc.m113.488346] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Heat shock factor 1 (HSF1) enhances the survival of cancer cells under various stresses. The knock-out of HSF1 impairs cancer formation and progression, suggesting that HSF1 is a promising therapeutic target. To identify inhibitors of HSF1 activity, we performed cell-based screening with a library of marketed and experimental drugs and identified cantharidin as an HSF1 inhibitor. Cantharidin is a potent antitumor agent from traditional Chinese medicine. Cantharidin inhibited heat shock-induced luciferase activity with an IC50 of 4.2 μm. In contrast, cantharidin did not inhibit NF-κB luciferase reporter activity, demonstrating that cantharidin is not a general transcription inhibitor. When the HCT-116 colorectal cancer cells were exposed to heat shock in the presence of cantharidin, the induction of HSF1 downstream target proteins, such as HSP70 and BAG3 (Bcl-2-associated athanogene domain 3), was suppressed. HSP70 and its co-chaperone BAG3 have been reported to protect cells from apoptosis by stabilizing anti-apoptotic Bcl-2 family proteins. As expected, treating HCT-116 cancer cells with cantharidin significantly decreased the amounts of BCL-2, BCL-xL, and MCL-1 protein and induced apoptotic cell death. Chromatin immunoprecipitation analysis showed that cantharidin inhibited the binding of HSF1 to the HSP70 promoter and subsequently blocked HSF1-dependent p-TEFb recruitment. Therefore, the p-TEFb-dependent phosphorylation of the C-terminal domain of RNA polymerase II was blocked, arresting transcription at the elongation step. Protein phosphatase 2A inhibition with PP2CA siRNA or okadaic acid did not block HSF1 activity, suggesting that cantharidin inhibits HSF1 in a protein phosphatase 2A-independent manner. We show for the first time that cantharidin inhibits HSF1 transcriptional activity.
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Affiliation(s)
- Joo Ae Kim
- From the Biomedical Genomics Research Center, Korea Research Institute of Bioscience and Biotechnology and
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21
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Min G, Lee SK, Kim HN, Han YM, Lee RH, Jeong DG, Han DC, Kwon BM. Rhodanine-based PRL-3 inhibitors blocked the migration and invasion of metastatic cancer cells. Bioorg Med Chem Lett 2013; 23:3769-74. [PMID: 23726031 DOI: 10.1016/j.bmcl.2013.04.092] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 04/21/2013] [Accepted: 04/30/2013] [Indexed: 11/28/2022]
Abstract
PRL-3, phosphatase of regenerating liver-3, plays a role in cancer progression through its involvement in invasion, migration, metastasis, and angiogenesis. We synthesized rhodanine derivatives, CG-707 and BR-1, which inhibited PRL-3 enzymatic activity with IC50 values of 0.8 μM and 1.1 μM, respectively. CG-707 and BR-1 strongly inhibited the migration and invasion of PRL-3 overexpressing colon cancer cells without exhibiting cytotoxicity. The specificity of the inhibitors on PRL-3 phosphatase activity was confirmed by the phosphorylation recovery of known PRL-3 substrates such as ezrin and cytokeratin 8. The compounds selectively inhibited PRL-3 in comparison with other phosphatases, and CG-707 regulated epithelial-to-mesenchymal transition (EMT) marker proteins. The results of the present study reveal that rhodanine is a specific PRL-3 inhibitor and a good lead molecule for obtaining a selective PRL-3 inhibitor.
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Affiliation(s)
- Garam Min
- Laboratory of Chemical Genomics and Biology, Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology, 125 Gwahakro, Yoosunggu, Daejeon 305-600, Republic of Korea
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22
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Lee SK, Han YM, Yun J, Lee CW, Shin DS, Ha YR, Kim J, Koh JS, Hong SH, Han DC, Kwon BM. Phosphatase of regenerating liver-3 promotes migration and invasion by upregulating matrix metalloproteinases-7 in human colorectal cancer cells. Int J Cancer 2012; 131:E190-203. [PMID: 22131018 DOI: 10.1002/ijc.27381] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2011] [Accepted: 11/22/2011] [Indexed: 11/09/2022]
Abstract
Phosphatase of regenerating liver (PRL)-3, a member of a subgroup of protein tyrosine phosphatases that can stimulate the degradation of the extracellular matrix, is over-expressed in metastatic colorectal cancer (CRC) relative to primary tumors. To determine whether PRL-3-induced enhancement of migration and invasion is dependent on the expression of matrix metalloproteinases (MMPs), PRL-3 was expressed in DLD-1 human CRC cells. The motility, migration and invasion characteristics of the cells were examined, and metastasis to the lung was confirmed in a nude mouse using PRL-3-overexpressing DLD-1 cells [DLD-1 (PRL-3)]. Migration and invasion of the cells were inhibited by phosphatase and farnesyltransferase inhibitors. Expression of MMPs was enhanced 3- to 10-fold in comparison to control cells, and migration and invasion were partially inhibited by small interfering RNA (siRNA) knockdown of MMP-2, -13 or -14. Importantly, siRNA knockdown of MMP-7 completely inhibited the migration and invasion of DLD-1 (PRL-3) cells, whereas overexpression of MMP-7 increased migration. The expression of MMP-7 was also downregulated by phosphatase and farnesyltransferase inhibitors. It was found that PRL-3 induced MMP-7 through oncogenic pathways including PI3K/AKT and ERK and that there is a relationship between the expression of PRL-3 and MMP-7 in human tumor cell lines. The expression of MMP-13 and -14 was very sensitive to the inhibition of farnesyltransferase; however, the migration and invasion of DLD-1 (PRL-3) cells did not strongly depend on the expression of MMP-13 or -14. These results suggest that the migration and invasion of PRL-3-expressing CRC cells depends primarily on the expression of MMP-7.
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Affiliation(s)
- Su-Kyung Lee
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology, Yuseonggu, Daejon, Republic of Korea
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Kim J, Lee YJ, Shin DS, Jeon SH, Son KH, Han DC, Jung SN, Oh TK, Kwon BM. Cosmomycin C inhibits signal transducer and activator of transcription 3 (STAT3) pathways in MDA-MB-468 breast cancer cell. Bioorg Med Chem 2011; 19:7582-9. [PMID: 22071520 DOI: 10.1016/j.bmc.2011.10.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 10/08/2011] [Accepted: 10/10/2011] [Indexed: 01/05/2023]
Abstract
The signal transducer and activator of transcription 3 (STAT3) is constitutively activated in cancer cells. Therefore, blocking the aberrant activity of STAT3 in tumor cells is a validated therapeutic strategy. To discover novel inhibitors of STAT3 activity, we screened against microbial natural products using a dual-luciferase assay. Using the microbial metabolome library, we identified cosmomycin C (CosC), which was isolated from the mycelium extract of Streptomyces sp. KCTC19769, as a STAT3 pathway inhibitor. CosC inhibited STAT3 (Tyr705) phosphorylation and subsequent nuclear translocation in MDA-MB-468 breast cancer cells. CosC-mediated inhibition of STAT3 signaling pathway was confirmed by suppressed expression of STAT3 downstream target proteins including cyclin D1, Bcl-xL, survivin, Mcl-1, and VEGF in CosC-treated MDA-MB-468 cells. Flow cytometry showed that CosC caused accumulation in the G(0)-G(1) phase of the cell cycle and induced apoptosis via PARP cleavage and caspase-3 activation. Based on these findings, CosC may be a potential candidate for modulation of STAT3 pathway.
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Affiliation(s)
- Jihoon Kim
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahakro, Yoosung, Daejeon 305-806, Republic of Korea
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Lee S, Kim JN, Lee HK, Yoon KS, Shin KD, Kwon BM, Han DC. Biological evaluation of KRIBB3 analogs as a microtubule polymerization inhibitor. Bioorg Med Chem Lett 2011; 21:977-9. [DOI: 10.1016/j.bmcl.2010.12.044] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Revised: 12/07/2010] [Accepted: 12/08/2010] [Indexed: 11/30/2022]
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Han YM, Shin DS, Lee YJ, Ismail IA, Hong SH, Han DC, Kwon BM. 2-Hydroxycurcuminoid induces apoptosis of human tumor cells through the reactive oxygen species-mitochondria pathway. Bioorg Med Chem Lett 2010; 21:747-51. [PMID: 21183341 DOI: 10.1016/j.bmcl.2010.11.114] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Revised: 11/23/2010] [Accepted: 11/24/2010] [Indexed: 12/21/2022]
Abstract
2-Hydroxycinnamaldehyde (HCA) and curcumin have been reported to have antitumor effects against various human tumor cells in vitro and in vivo by generation of ROS. Aldehyde-free HCA analogs were synthesized based on the structure of curcumin, which we have called 2-hydroxycurcuminoids. The hydroxyl group of curcuminoids enhances the ability to generate ROS. 2-Hydroxycurcuminoid (HCC-7) strongly inhibited the growth of SW620 colon tumor cells with a GI(50) value of 7μM, while the parent compounds, HCA and curcumin, displayed GI(50) values of 12 and 30μM, respectively. HCC-7 was found to induce apoptosis through the reactive oxygen species-mitochondria pathway and cell cycle arrest at G2/M phase.
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Affiliation(s)
- Young-Min Han
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, 52 Uendong, Yoosung, Daejeon 305-806, Republic of Korea
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Yoon YJ, Kim JA, Shin KD, Shin DS, Han YM, Lee YJ, Lee JS, Kwon BM, Han DC. KRIBB11 inhibits HSP70 synthesis through inhibition of heat shock factor 1 function by impairing the recruitment of positive transcription elongation factor b to the hsp70 promoter. J Biol Chem 2010; 286:1737-47. [PMID: 21078672 DOI: 10.1074/jbc.m110.179440] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Heat shock factor 1 (HSF1) is the master switch for heat shock protein (HSP) expression in eukaryotes. A synthetic chemical library was screened to identify inhibitors of HSF1 using a luciferase reporter under the control of a heat shock element. A compound named KRIBB11 (N(2)-(1H-indazole-5-yl)-N(6)-methyl-3-nitropyridine-2,6-diamine) was identified for its activity in abolishing the heat shock-induced luciferase activity with an IC(50) of 1.2 μmol/liter. When the cells were exposed to heat shock in the presence of KRIBB11, the induction of HSF1 downstream target proteins such as HSP27 and HSP70 was blocked. In addition, treatment of HCT-116 cells with KRIBB11 induced growth arrest and apoptosis. Markers of apoptosis, such as cleaved poly(ADP-ribose) polymerase, were detected after KRIBB11 treatment. Biotinyl-KRIBB11 was synthesized as an affinity probe for the identification of KRIBB11 target proteins. Using affinity chromatography and competition assays, KRIBB11 was shown to associate with HSF1 in vitro. Chromatin immunoprecipitation analysis showed that KRIBB11 inhibited HSF1-dependent recruitment of p-TEFb (positive transcription elongation factor b) to the hsp70 promoter. Finally, intraperitoneal treatment of nude mice with KRIBB11 at 50 mg/kg resulted in a 47.4% (p < 0.05) inhibition of tumor growth without body weight loss. Immunoblotting assays showed that the expression of HSP70 was lower in KRIBB11-treated tumor tissue than in control tissues. Because HSPs are expressed at high levels in a wide range of tumors, these results strengthen the rationale for targeting HSF1 in cancer therapy.
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Affiliation(s)
- Young Ju Yoon
- Medical Genomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Korea
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Kim J, Han DC, Kwon B. Peroxisome Proliferator‐Activated Receptorγ Agonist Rosiglitazone Increases Expression of Lipin‐1 in Adipocytes. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.914.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jina Kim
- Korea Research Institute of Bioscience and BiotechnologyDaejeonRepublic of Korea
| | - Dong Cho Han
- Korea Research Institute of Bioscience and BiotechnologyDaejeonRepublic of Korea
| | - Byoung‐Mog Kwon
- Korea Research Institute of Bioscience and BiotechnologyDaejeonRepublic of Korea
- BioMolecular ScienceUniversity of Science and Technology in KoreaDaejeonRepublic of Korea
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Lee HS, Lee SY, Ha HL, Han DC, Han JM, Jeong TS, Yu DY, Yeom YI, Kwon BM, Moon EY. 2'-Benzoyloxycinnamaldehyde inhibits tumor growth in H-ras12V transgenic mice via downregulation of metallothionein. Nutr Cancer 2010; 61:723-34. [PMID: 19838947 DOI: 10.1080/01635580902825613] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Cinnamaldehydes have been reported to induce apoptosis in human carcinomas through the generation of reactive oxygen species (ROS). 2'-benzoyloxycinnamaldehyde (BCA) has been reported to inhibit tumor formation in H-ras12V transgenic mice. To see the antitumor effects of BCA, BCA was administrated intraperitoneally (50 mg/kg) to H-ras12V transgenic mice for 3 wk, and it was found that the hepatic tumor volume and the total number of tumors were decreased in BCA-treated mice as compared to control H-ras12V transgenic mice. To identify possible target genes responsible for BCA antitumor effects in H-ras12V transgenic mice, cDNA microarray analyses were performed comparing gene expression between BCA treated and control transgenic mice. We found that 42 genes were downregulated, and 40 genes were upregulated in the BCA-treated transgenic mice. The downregulated genes included several genes involved in ROS regulation and immune response (aconitase, metallothionein-1, metallothionein-2, and purine nucleoside phosphorylase). The expression of ROS-related genes, metallothionein 1 and metallothionein 2, was decreased more than twofold with BCA treatment (P < 0.001). It was confirmed by RT-PCR and immunohistochemical analyses. The inhibition of tumor formation and growth in H-ras12V transgenic mice by BCA was mediated through inhibition of the expression of the ROS scavengers metallothionein 1 and metallothionein 2.
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Affiliation(s)
- Heun-Sik Lee
- Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
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Shin DS, Masciocchi D, Gelain A, Villa S, Barlocco D, Meneghetti F, Pedretti A, Han YM, Han DC, Kwon BM, Legnani L, Toma L. Synthesis, modeling, and crystallographic study of 3,4-disubstituted-1,2,5-oxadiazoles and evaluation of their ability to decrease STAT3 activity. Med Chem Commun 2010. [DOI: 10.1039/c0md00057d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Shin DS, Kim HN, Shin KD, Yoon YJ, Kim SJ, Han DC, Kwon BM. Cryptotanshinone inhibits constitutive signal transducer and activator of transcription 3 function through blocking the dimerization in DU145 prostate cancer cells. Cancer Res 2009; 69:193-202. [PMID: 19118003 DOI: 10.1158/0008-5472.can-08-2575] [Citation(s) in RCA: 253] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Because signal transducer and activator of transcription 3 (STAT3) is constitutively activated in most human solid tumors and is involved in the proliferation, angiogenesis, immune evasion, and antiapoptosis of cancer cells, researchers have focused on STAT3 as a target for cancer therapy. We screened for natural compounds that inhibit the activity of STAT3 using a dual-luciferase assay. Cryptotanshinone was identified as a potent STAT3 inhibitor. Cryptotanshinone rapidly inhibited STAT3 Tyr705 phosphorylation in DU145 prostate cancer cells and the growth of the cells through 96 hours of the treatment. Inhibition of STAT3 Tyr705 phosphorylation in DU145 cells decreased the expression of STAT3 downstream target proteins such as cyclin D1, survivin, and Bcl-xL. To investigate the cryptotanshinone inhibitory mechanism in DU145 cells, we analyzed proteins upstream of STAT3. Although phosphorylation of Janus-activated kinase (JAK) 2 was inhibited by 7 micromol/L cryptotanshinone at 24 hours, inhibition of STAT3 Tyr705 phosphorylation occurred within 30 minutes and the activity of the other proteins was not affected. These results suggest that inhibition of STAT3 phosphorylation is caused by a JAK2-independent mechanism, with suppression of JAK2 phosphorylation as a secondary effect of cryptotanshinone treatment. Continuing experiments revealed the possibility that cryptotanshinone might directly bind to STAT3 molecules. Cryptotanshinone was colocalized with STAT3 molecules in the cytoplasm and inhibited the formation of STAT3 dimers. Computational modeling showed that cryptotanshinone could bind to the SH2 domain of STAT3. These results suggest that cryptotanshinone is a potent anticancer agent targeting the activation STAT3 protein. It is the first report that cryptotanshinone has antitumor activity through the inhibition of STAT3.
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Affiliation(s)
- Dae-Seop Shin
- Laboratory of Chemical Biology and Chemical Genomics, Korea Research Institute of Bioscience and Biotechnology, 52 Uendong Yoosunggu, Daejeon, Korea
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Lee SK, Kim HN, Kang YR, Lee CW, Kim HM, Han DC, Shin J, Bae K, Kwon BM. Obovatol inhibits colorectal cancer growth by inhibiting tumor cell proliferation and inducing apoptosis. Bioorg Med Chem 2008; 16:8397-402. [PMID: 18762427 DOI: 10.1016/j.bmc.2008.08.033] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2008] [Revised: 08/13/2008] [Accepted: 08/14/2008] [Indexed: 11/25/2022]
Abstract
Neolignans such as obovatol, honokiol, and magnolol have been previously reported to show various biological activities including anti-inflammation and antitumor effects. This is the first demonstration on the in vivo antitumor effect of obovatol on human colorectal carcinoma SW620 cells. Nude mice were implanted with SW620 cells and fed with vehicle or 5mg/kg/d dose of obovatol for 20 days. Obovatol inhibited tumor growth that accounted for 50% decrease in tumor volume and 44.6% decrease in tumor weight at the end of the experiment without any adverse health effect. In nude mice bearing SW620-incubated tumor, obovatol exhibited more potent antitumor activity than honolkiol. In addition, DNA flow cytometric analysis shows that obovatol progresses to apoptosis as detected by flow cytometry after double staining with annexin V and propidium iodide. Thus, we suggest that obovatol is a potent inducer of cell apoptosis in SW620 cells, and a potent antitumor agent.
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Affiliation(s)
- Su-Kyung Lee
- Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology, 52 Uendong, Yuseonggu, Daejon 305-600, Republic of Korea
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Shin DS, Kim J, Han DC, Son KH, Lee CW, Kim HM, Hong SH, Kwon BM. Synthesis and biological evaluation of cinnamyl compounds as potent antitumor agents. Bioorg Med Chem Lett 2007; 17:5423-7. [PMID: 17683933 DOI: 10.1016/j.bmcl.2007.07.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2007] [Revised: 06/03/2007] [Accepted: 07/11/2007] [Indexed: 10/23/2022]
Abstract
A series of cinnamyl compounds related to 2'-hydroxycinnamaldehyde were synthesized and their antitumor effects against human cancer cells evaluated. Hydroxylamine derivative 6 inhibited the growth of human cancer cells and human colon tumor xenograft in nude mice. Its antitumor effects belong to the induction of apoptosis and arresting cell cycle at G(2)/M phase, which is confirmed by detection of apoptosis markers and cell cycle analysis.
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Affiliation(s)
- Dae-Seop Shin
- Korea Research Institute of Bioscience and Biotechnology, 52 Uendong Yoosung, Daejeon 305-333, Republic of Korea
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Shin KD, Yoon YJ, Kang YR, Son KH, Kim HM, Kwon BM, Han DC. KRIBB3, a novel microtubule inhibitor, induces mitotic arrest and apoptosis in human cancer cells. Biochem Pharmacol 2007; 75:383-94. [PMID: 17915194 DOI: 10.1016/j.bcp.2007.08.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2007] [Revised: 08/13/2007] [Accepted: 08/22/2007] [Indexed: 10/22/2022]
Abstract
KRIBB3 (5-(5-ethyl-2-hydroxy-4-methoxyphenyl)-4-(4-methoxyphenyl) isoxazole) inhibited cancer cell growth in vitro and in vivo. Flow cytometry studies showed that KRIBB3 caused cell cycle arrest at the G(2)/M phase and subsequent apoptosis. This was confirmed as accumulation of Cyclin B1 and cleavage of poly(ADP-ribose) polymerase (PARP) were detected. While transient inhibition by KRIBB3 led to reversible mitotic arrest, prolonged exposure to KRIBB3-induced apoptosis. Co-immunoprecipitation experiments showed that KRIBB3 initially induced association of inhibitory Mad2 with p55CDC (mammalian homologue of CDC20), an activator of APC/C (anaphase-promoting complex/cyclosome), suggesting that the mitotic spindle checkpoint was activated by KRIBB3. However, the level of this inhibitory complex of Mad2 with p55CDC was gradually decreased 24 h after KRIBB3 treatment, and was hardly detectable after 48 h, indicating some slipping of the mitotic checkpoint. Consistent with these observations, KRIBB3 activated the mitotic spindle checkpoint by disrupting the microtubule cytoskeleton. KRIBB3 was proven to be a tubulin inhibitor using in vitro polymerization assays and in vivo indirect immunofluorescence staining. The temporal pattern of Bax activation by KRIBB3 was similar to PARP cleavage, suggesting that Bax is a mediator of KRIBB3-dependent apoptosis. Furthermore, when KRIBB3 was administered intraperitoneally into nude mice at 50 mg/kg or 100 mg/kg, it inhibited 49.5 or 70.3% of tumor growth, respectively. These results suggest that KRIBB3 is a good drug candidate for cancer therapy.
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Affiliation(s)
- Ki Deok Shin
- Molecular Cancer Research Center, Korea Research Institute of Bioscience and Biotechnology, 52 Eoeun-dong Yuseong-gu, Daejeon 305-806, Republic of Korea
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Hong SH, Kim J, Kim JM, Lee SY, Shin DS, Son KH, Han DC, Sung YK, Kwon BM. Apoptosis induction of 2′-hydroxycinnamaldehyde as a proteasome inhibitor is associated with ER stress and mitochondrial perturbation in cancer cells. Biochem Pharmacol 2007; 74:557-65. [PMID: 17606223 DOI: 10.1016/j.bcp.2007.05.016] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2007] [Revised: 05/18/2007] [Accepted: 05/21/2007] [Indexed: 11/27/2022]
Abstract
2'-Hydroxycinnamaldehyde (HCA), isolated from the stem bark of Cinnamomum cassia, and 2'-benzoyloxycinnamaldehyde (BCA), one of HCA derivatives, have antiproliferative activities on several human cancer cell lines. Our previous study suggested that reactive oxygen species (ROS) and caspase-3 are the major regulators of HCA-induced apoptosis. In the present study, we demonstrated a novel molecular target using in vitro pull-down assay by biotin-labeled HCA (biotin-HCA) in SW620 cells. We analyzed 11 differential spots of 2-dimensional gel prepared with pull-downed proteins by biotin-HCA. Among them, five spots were identified as proteasome subunits. An in vitro 26S proteasome function assay using specific fluorogenic substrates showed that HCA potently inhibits L3-like activity of the proteasome. In addition, HCA showed inhibitory action against chymotrypsin-like, trypsin-like, and PGPH-like activities. DNA microarray showed that HCA induced heat shock family and ER stress-responsive genes, which reflects the accumulation of misfolded proteins by proteasome inhibition. On western blot analysis, it was confirmed that HCA induces glucose-regulated protein, 78 kDa (GRP78) and some representative endoplasmic reticulum (ER) stress-responsive proteins. Furthermore, HCA treatment decreased mitochondrial membrane potential. The effect of HCA on cytochrome c and Bax translocation between cytosol and mitochondrial membrane was clarified using western blot analysis. These results suggest that HCA-induced apoptosis is associated with the inhibition of the proteasome activity that leads in turn to the increase of ER stress and mitochondrial perturbation.
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Affiliation(s)
- Su Hyung Hong
- Department of Dental Microbiology, School of Dentistry, Kyungpook National University, Daegu 700-412, Republic of Korea
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Lee SK, Chun HK, Yang JY, Han DC, Son KH, Kwon BM. Inhibitory effect of obovatal on the migration and invasion of HT1080 cells via the inhibition of MMP-2. Bioorg Med Chem 2007; 15:4085-90. [PMID: 17428670 DOI: 10.1016/j.bmc.2007.03.081] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Revised: 03/26/2007] [Accepted: 03/26/2007] [Indexed: 11/27/2022]
Abstract
Because the activation of matrix metalloproteinases (MMP) is a key factor in the metastatic process, compounds with the ability to inhibit MMP activity have a potential in the treatment of tumor. From the examination of 2000 plant extracts, obovatal isolated from the extract of the leaves of Magnolia obovata THUNB was a potent inhibitor of MMP-2 enzyme in vitro. In human fibrosarcoma cells (HT1080) activated with MMP-2, obovatal inhibited MMP-2 enzyme activity and expression. In addition, the compound blocked migration and invasion of the cells. This study demonstrates that obovatal exerts its anticancer effects through blocking migration and invasion by inhibition of MMP-2 expression and activity, and also will be a good lead molecule for the development of anti-tumor drug.
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Affiliation(s)
- Su-Kyung Lee
- Korea Research Institute of Bioscience and Biotechnology, 52 Uendong, Yusung, Taejon 305-600, Republic of Korea
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Lee SK, Kim JM, Lee MY, Son KH, Yeom YI, Kim CH, Shin Y, Koh JS, Han DC, Kwon BM. Confirmation of a linkage between H-Ras and MMP-13 expression as well as MMP-9 by chemical genomic approach. Int J Cancer 2006; 118:2172-81. [PMID: 16331612 DOI: 10.1002/ijc.21610] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
As farnesylation of the Ras protein by farnesyl transferase is a critical step for the Ras functional activity, the farnesyl transferase inhibitor could affect H-Ras functions and the inhibitors such as arteminolide, SCH66336 and LB42908 completely inhibited Ras-farnesylation. However, they did not induce apoptosis of H-Ras-transformed cells with concentration for blocking H-Ras farnesylation. To determine the antitumor effects of the inhibitors, it was analyzed through the expression profile of genes, regulated by activated H-Ras or FTIs by using cDNA microarray. On the basis of the results, the relationship between H-Ras and MMPs expression was confirmed by RT-PCR, Western bolt, zymographic analysis and angiogenesis assay. Our results suggested that activation of MMP-13 as well as MMP-9 induced by H-Ras is involved in angiogenesis and with farnesyl transferase inhibitors, in part, exerts their anticancer effects. We confirmed that MMP-13 is a critical H-Ras target gene through chemical genomic approaches with farnesyl transferase inhibitors.
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Affiliation(s)
- Su-Kyung Lee
- Korea Research Institute of Bioscience and Biotechnology, Yoosunggu, Taejon 305-600, Korea
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Shin DS, Kim JH, Lee SK, Han DC, Son KH, Kim HM, Cheon HG, Kim KR, Sung ND, Lee SJ, Kang SK, Kwon BM. Synthesis and biological evaluation of dimeric cinnamaldehydes as potent antitumor agents. Bioorg Med Chem 2006; 14:2498-506. [PMID: 16343908 DOI: 10.1016/j.bmc.2005.11.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2005] [Revised: 11/14/2005] [Accepted: 11/15/2005] [Indexed: 12/21/2022]
Abstract
It has been reported that 2-hydroxycinnamaldehyde and 2-benzoyl-oxycinnamaldehyde inhibited the activity of farnesyl protein transferase, angiogenesis, cell-cell adhesion, and tumor growth in vivo model. In order to improve its anti-tumor activity, dimeric cinnamaldehydes have been synthesized based on 2-hydroxycinnamaldehyde. The synthesized compounds strongly inhibited the growth of human colon tumor cells with GI50 values of 0.6-10 microM. Especially, 2-piperazine derivative blocked in vivo growth of human colon tumor xenograft in nude mice at 10 mg/kg. It was found that their anti-tumor effects induce apoptosis and cell cycle arrest at G2/M phase by the compounds. It was confirmed by detection of apoptosis markers such as activated caspase-3 and cleaved PARP, and cell cycle analysis. The dimeric compounds also inhibited Cdc25B phosphatase which is essential for preinitiating G2/M transition and S phase progression.
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Affiliation(s)
- Dae-Seop Shin
- Korea Research Institute of Bioscience and Biotechnology, 52 Uendong Yoosung, Taejeon 305-600, Republic of Korea
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Choi SK, Oh HM, Lee SK, Jeong DG, Ryu SE, Son KH, Han DC, Sung ND, Baek NI, Kwon BM. Biflavonoids inhibited phosphatase of regenerating liver-3 (PRL-3). Nat Prod Res 2006; 20:341-6. [PMID: 16644528 DOI: 10.1080/14786410500463312] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Two biflavonoids, ginkgetin (1) and sciadopitysin (2), were isolated from the MeOH extract of the young branches of Taxus cuspidata, which inhibited phosphatase of regenerating liver-3 (PRL-3) with IC50 values of 25.8 and 46.2 microM, respectively. This is the first report on PRL-3 inhibitors, isolated from natural sources.
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Affiliation(s)
- Sung-Kyu Choi
- Korea Research Institute of Bioscience and Biotechnology, 52 Uendong, Yusung, Taejon 305-600, Republic of Korea
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Kang HM, Lee SK, Shin DS, Lee MY, Han DC, Baek NI, Son KH, Kwon BM. Dehydrotrametenolic acid selectively inhibits the growth of H-ras transformed rat2 cells and induces apoptosis through caspase-3 pathway. Life Sci 2006; 78:607-13. [PMID: 16112686 DOI: 10.1016/j.lfs.2005.05.066] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2005] [Accepted: 05/03/2005] [Indexed: 01/22/2023]
Abstract
The screening of natural products that preferentially inhibit growth of H-ras transformed rat2 cells vs. rat2 cells was performed to identify H-ras specific growth inhibitor. A lanostane-type triterpene acid, dehydrotrametenolic acid (3beta-hydroxylanosta-7,9(11),24-trien-21-oic acid), was isolated from the sclerotium of Poria cocos (Polyporaceae). Dehydrotrametenolic acid selectively inhibited the growth of H-ras transformed cells with a GI(50) value of 40 microM. FACS analysis indicated that the compound exerted its anti-proliferation effects through cell cycle arrest at G2/M phase and accumulation of sub-G1 population. Dehydrotrametenolic acid-induced apoptosis was further confirmed with chromosomal DNA fragmentation, caspase-3 activation, and degradation of PARP and Lamin A/C degradation. The compound also regulated the expression of H-ras, Akt and Erk, which are the downstream proteins of H-ras signaling pathways. The results suggest that dehydrotrametenolic acid can be a potential anticancer agent against H-ras transformed tumor.
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Affiliation(s)
- Hyun-Mi Kang
- Korea Research Institute of Bioscience and Biotechnology, 52 Uendong, Yusung, Taejon, Republic of Korea
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Heum Park J, Cho Han D, Kim J, Hyung Hong S, Lee SK, Seog Yoon K, Min Kim J, Son KH, Miyazawa K, Kwon BM. Differential regulation of anti-inflammatory proteins in human rheumatoid synoviocyte MH7A cell by celecoxib and ibuprofen. Life Sci 2005; 78:2204-12. [PMID: 16289138 DOI: 10.1016/j.lfs.2005.09.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2005] [Accepted: 09/07/2005] [Indexed: 11/21/2022]
Abstract
Non-steroidal anti-inflammatory drugs are known to be the most widely used drugs to exert their anti-inflammatory activities. It was examined protein expression profiles of human rheumatoid fibroblast-like synoviocyte MH7A cells treated with celecoxib, a selective cyclooxygenase-2 inhibitor, or ibuprofen, a non-selective cyclooxygenase inhibitor, using two-dimensional gel electrophoresis for comparison the mechanism of the drugs. Altered expression pattern in response to celecoxib is significantly different from that of ibuprofen treated cells. When MH7A cells were treated with celecoxib, 28 proteins were affected at their expression levels. Among them, heat shock proteins (Hsp60 and 70), glucose regulated proteins (Hsp75 and 78) were observed to be up-regulated by 1 to 30 microM concentrations of celecoxib but those proteins were not affected in ibuprofen treated cells. On the other hand, the expression of 19 proteins was changed by ibuprofen and the expression of apolipoprotein E, RNA binding motif 4, CTP-phosphocholine cytidylyltransferase, and phospholipase A2 inhibitory protein was only altered by ibuprofen. The expressions of 15 proteins were affected by both celecoxib and ibuprofen. Our results showed that celecoxib and ibuprofen, though they are known to act as cyclooxygenase inhibitors, could exert a different mode of acting mechanisms in anti-inflammatory processes. The chemical proteomic approach will be useful for figuring out the mode of actions of drugs.
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Affiliation(s)
- Jong Heum Park
- Korea Research Institute of Bioscience and Biotechnology, Taejeon, Republic of Korea
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Oh HM, Choi SK, Lee JM, Lee SK, Kim HY, Han DC, Kim HM, Son KH, Kwon BM. Cyclopentenediones, inhibitors of farnesyl protein transferase and anti-tumor compounds, isolated from the fruit of Lindera erythrocarpa Makino. Bioorg Med Chem 2005; 13:6182-7. [PMID: 16055336 DOI: 10.1016/j.bmc.2005.06.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2005] [Revised: 06/15/2005] [Accepted: 06/16/2005] [Indexed: 12/30/2022]
Abstract
Four cyclopentenediones, farnesyl protein transferase inhibitors, and anti-tumor compounds were isolated from the methanolic extract of the fruits of Lindera erythrocarpa Makino (Lauraceae). The structure of the compounds was determined by spectral data including NMR and mass spectrometry, and cyclopentenediones such as methyllinderone (1), methyllucidone (2), lucidone (3), and linderone (4) were identified by comparing their reported spectral data with that of the literature values. Compounds 1-4 inhibited farnesyl protein transferase with IC50 value of 55.3+/-4.1, 42+/-1.9, 103+/-5.1, and 40+/-3.5 microM, respectively. Isolated compounds also inhibited the growth of various human cancer cell lines in a dose-dependent manner. Especially, Compounds 1 and 2 selectively inhibited the growth of H-ras-transformed rat-2 cell lines in comparison with normal rat-2 cells with a GI50 value of 0.3 and 0.85 microM, respectively. Methyllucidone strongly inhibited the growth of human cancer cells and colon tumor xenografted in nude mice. The anti-tumor effects of the compound were further confirmed with caspase-3 activation and degradation of PARP. The results suggest that methyllucidone can be a potential anti-cancer agent against H-ras-transformed tumor and will also be a good lead molecule for the development of anti-tumor drug.
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Affiliation(s)
- Hyun-Mi Oh
- Korea Research Institute of Bioscience and Biotechnology, 52 Uendong Yoosung, Taejeon 305-600, Republic of Korea
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42
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Shin KD, Lee MY, Shin DS, Lee S, Son KH, Koh S, Paik YK, Kwon BM, Han DC. Blocking tumor cell migration and invasion with biphenyl isoxazole derivative KRIBB3, a synthetic molecule that inhibits Hsp27 phosphorylation. J Biol Chem 2005; 280:41439-48. [PMID: 16234246 DOI: 10.1074/jbc.m507209200] [Citation(s) in RCA: 146] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Cell migration is a prerequisite for cancer invasion and metastasis, suggesting cell motility as a potential therapeutic target for cancer treatment. A synthetic library was screened to identify inhibitors of tumor cell migration. From this, we discovered that CAC-1098 (aurintricarboxylic acid) and CBI-0997 (5-(2,4-dimethoxy-5-ethylphenyl)-4-(4-bromophenyl) isoxazole) inhibited migration of MDA-MB-231 cells with IC50 = 5 and 50 nM, respectively. We synthesized KRIBB3 (5-(5-ethyl-2-hydroxy-4-methoxyphenyl)-4-(4-methoxyphenyl) isoxazole) by replacing the bromide group of CBI-0997 with a methoxyl group. Like CBI-0997, KRIBB3 has anti-migratory and anti-invasive activities in MDA-MB-231 cells. Because KRIBB3 has a better drug-like structure, we focused our effort on further understanding its anti-migratory mechanism. Biotinyl-KRIBB3 was synthesized as an affinity probe for identification of KRIBB3-binding proteins. Using affinity chromatography, we identified Hsp27 as a target protein of KRIBB3 in vitro. Treatment of MDA-MB-231 cells with phorbol 12-myristate 13-acetate induced protein kinase C-dependent phosphorylation of Hsp27 and tumor cell migration. In contrast, treatment of MDA-MB-231 cells with KRIBB3 blocked phorbol 12-myristate 13-acetate-induced phosphorylation of Hsp27 and tumor cell migration. Furthermore, overexpression of Hsp27 antagonized the inhibitory effect of KRIBB3 on tumor cell invasion, and knockdown of Hsp27 using small interfering RNA inhibited tumor cell migration. Overall, our results demonstrate that KRIBB3 inhibits tumor cell migration and invasion by blocking protein kinase C-dependent phosphorylation of Hsp27 through its direct binding to Hsp27.
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MESH Headings
- Amino Acid Sequence
- Anisoles/chemistry
- Anisoles/pharmacology
- Antineoplastic Agents/pharmacology
- Blotting, Western
- Bromides/chemistry
- Cell Line, Tumor
- Cell Membrane/metabolism
- Cell Movement
- Chromatography, Affinity
- Crk-Associated Substrate Protein/metabolism
- DNA, Complementary/metabolism
- Dose-Response Relationship, Drug
- Drug Screening Assays, Antitumor
- Enzyme Activation
- Enzyme Inhibitors/pharmacology
- Focal Adhesion Protein-Tyrosine Kinases/metabolism
- HSP27 Heat-Shock Proteins
- Heat-Shock Proteins/antagonists & inhibitors
- Humans
- Inhibitory Concentration 50
- Intracellular Signaling Peptides and Proteins
- Isoxazoles/chemistry
- Isoxazoles/pharmacology
- Models, Chemical
- Molecular Chaperones
- Molecular Sequence Data
- Neoplasm Invasiveness
- Neoplasm Proteins/antagonists & inhibitors
- Neoplasms/drug therapy
- Neoplasms/metabolism
- Phosphatidylinositol 3-Kinases/metabolism
- Phosphorylation
- Protein Binding
- Protein Kinase C/metabolism
- Protein Serine-Threonine Kinases/metabolism
- Protein Structure, Tertiary
- RNA, Small Interfering/chemistry
- RNA, Small Interfering/metabolism
- Time Factors
- Transfection
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Affiliation(s)
- Ki Deok Shin
- Korea Research Institute of Bioscience and Biotechnology, 52 Uendong Yoosunggu, Daejeon 305-600, Korea
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Son KH, Oh HM, Choi SK, Han DC, Kwon BM. Anti-tumor abietane diterpenes from the cones of Sequoia sempervirens. Bioorg Med Chem Lett 2005; 15:2019-21. [PMID: 15808460 DOI: 10.1016/j.bmcl.2005.02.057] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2005] [Revised: 02/17/2005] [Accepted: 02/18/2005] [Indexed: 12/01/2022]
Abstract
A new abietane, namely, 20-hydroxyferruginol (1), together with known ferruginol (2), 18-hydroxyferruginol (3), sugiol (4), and 6alpha-hydroxysugiol (5), were isolated from the cones of Sequoia sempervirens. Their structures were elucidated through spectral data. Compounds 1 and 5 strongly inhibited colon, lung, and breast human tumors and oncogene transformed cells with GI(50) 2-5 microg/mL.
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Affiliation(s)
- Kwang-Hee Son
- Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology in Korea, 52 Uendong Yoosunggu Taejeon, 305-600 Republic of Korea
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44
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Lee SH, Lee SY, Son DJ, Lee H, Yoo HS, Song S, Oh KW, Han DC, Kwon BM, Hong JT. Inhibitory effect of 2'-hydroxycinnamaldehyde on nitric oxide production through inhibition of NF-kappa B activation in RAW 264.7 cells. Biochem Pharmacol 2005; 69:791-9. [PMID: 15710356 DOI: 10.1016/j.bcp.2004.11.013] [Citation(s) in RCA: 103] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2004] [Accepted: 11/08/2004] [Indexed: 02/03/2023]
Abstract
Cinnamomum cassia has been widely used for treating dyspepsia, gastritis, and inflammatory disease. In the present study, several of cinnamaldehyde derivatives were synthesized from various cinnamic acid based on the 2'-hydroxycinnamaldehyde isolated from the bark C. cassia Blume was investigated to compare their NO production and NF-kappa B activity from Raw 264.7 cell since nitric oxide (NO) and NF-kappa B have been shown to be implicated factors in the inflammatory disease. The results show that HCA, among the derivatives, most significantly inhibited lipopolysaccharide (LPS)-induced NO production and NF-kappa B transcriptional activity in a dose-dependent manner with an IC(50) value of 8 and 22 microM, respectively. We next investigated putative possible mechanisms of inhibitory effect of HCA on NO production. The inhibition of NO by HCA was consistent with the inhibitory effect on LPS-induced inducible nitric oxide synthase (iNOS) expression. Moreover, HCA inhibited LPS-induced p50 and p65 translocation resulting in the inhibition of the DNA binding activity of the NF-kappa B, a central regulator of iNOS. The present results provided evidence that HCA, among cinnamaledhyde derivatives, has the most inhibitory effect on NO production through inhibition of NF-kappa B activation, and thus can be used as an anti-inflammatory agent.
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Affiliation(s)
- Seung Ho Lee
- College of Pharmacy, Chungbuk National University, Heungduk-gu, Cheongju 361-763, South Korea
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Lee SH, Lee MY, Kang HM, Han DC, Son KH, Yang DC, Sung ND, Lee CW, Kim HM, Kwon BM. Anti-tumor activity of the farnesyl-protein transferase inhibitors arteminolides, isolated from Artemisa. Bioorg Med Chem 2004; 11:4545-9. [PMID: 14527550 DOI: 10.1016/j.bmc.2003.08.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Members of the Artemisia genus are important medicinal plants found throughout the world. Arteminolides A-D (1-4), isolated from the aerial parts of Artemisia, have an inhibitory activity on farnesyl-protein transferase (FPTase; EC 2.5.1.29) in in vitro assay. This study was carried out with the purpose of validating anti-tumor effects of the compounds in human tumor cells and mouse xenograft model. The arteminolides inhibited tumor cell growth in a dose-dependent manner. Furthermore, arteminolide C (3) blocked in vivo growth of human colon and lung tumor xenograft without the loss of body weight in nude mice.
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Affiliation(s)
- Seung Ho Lee
- Korea Research Institute of Bioscience and Biotechnology, 52 Uendong Yoosunggu, Taejeon 305-600, South Korea
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Han DC, Lee MY, Shin KD, Jeon SB, Kim JM, Son KH, Kim HC, Kim HM, Kwon BM. 2′-Benzoyloxycinnamaldehyde Induces Apoptosis in Human Carcinoma via Reactive Oxygen Species. J Biol Chem 2004; 279:6911-20. [PMID: 14660655 DOI: 10.1074/jbc.m309708200] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
2'-hydroxycinnamaldehyde (HCA) has been shown to have inhibitory effects on farnesyl protein transferase in vitro, angiogenesis, and tumor cell growth. However, mechanism for these inhibitions remains unknown. As a derivative of HCA, BCA (2'-benzoyl-oxycinnamaldehyde) was synthesized by replacing hydroxyl group with benzoyl-oxyl group. When p53-mutated cancer cell lines (MDA-MB-231 breast cancer cell and SW620 colon cancer cell) were treated with 10 microM HCA or BCA, it induced growth arrest and apoptosis of tumor cells. Markers of apoptosis such as degradations of chromosomal DNA and poly(ADP-ribose) polymerase and activation of caspase-3 were detected after HCA or BCA treatment. BCA-induced apoptosis was blocked by pretreatment of cells with anti-oxidants, glutathione, or N-acetyl-cysteine. In addition, BCA-induced activation of caspase-3 and degradation of poly(ADP-ribose) polymerase were abolished by pretreatment of cells with the anti-oxidants. These results suggest that reactive oxygen species are major regulator of BCA-induced apoptosis. HCA or BCA-induced accumulation of reactive oxygen species was detected by using DCF-DA, an intracellular probe of oxidative stress. Furthermore, when BCA (100 mg/kg) was administrated intraperitoneally or orally into a nude mouse, it inhibited >88 or 41% of tumor growth, respectively, without any detectable weight change. These results suggest that BCA is a good drug candidate for cancer therapy.
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Affiliation(s)
- Dong Cho Han
- Korea Research Institute of Bioscience and Biotechnology, 52 Uendong Yoosunggu, Taejeon 305-600, Korea
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Han DC, Huang GTJ, Lin LM, Warner NA, Gim JS, Jewett A. Expression of MHC Class II, CD70, CD80, CD86 and pro-inflammatory cytokines is differentially regulated in oral epithelial cells following bacterial challenge. ACTA ACUST UNITED AC 2003; 18:350-8. [PMID: 14622340 DOI: 10.1046/j.0902-0055.2003.00094.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Oral epithelium may play a regulatory role in local immune responses when interacting with bacteria. The present study was undertaken to investigate the effects of selected bacterial pathogens found in periodontal and endodontic infections on oral epithelial cells. Expression of cell surface molecules (major histocompatibility complex (MHC) Class II, CD54, CD70, CD80 and CD86) and secretion of inflammatory cytokines (interleukin (IL)-1beta, IL-6, and tumor necrosis factor (TNF)-alpha) in response to selected bacterial challenge were examined on an immortalized oral epithelial cell line, HOK-18A and a skin epithelial cell line, HaCaT. Actinomyces viscosus, Actinomyces israelii, Fusobacterium nucleatum lipopolysaccharide (LPS) or primary human periradicular exudate from a granuloma were co-cultured with epithelial cells for 4 or 24 h. Subsequently, cell surface expression of MHC Class II, CD54, CD70, CD80 and CD86, along with pro-inflammatory cytokine levels were determined using flow cytometry, ELISA and RT-PCR. Results indicated that the selected oral bacteria have greater effects on oral versus skin epithelial cells. F. nucleatum increased MHC Class II and CD54 (ICAM-1) cell surface expression on HOK-18A and HaCaT cells. A. israelii also had enhancing effects on the expression of CD54 and MHC Class II. A. israelii and LPS induced a 2.8-fold (P < 0.001) and 4.4-fold (P < 0.005) TNF-alpha secretion, respectively, while F. nucleatum and LPS induced a 10-fold (P < 0.0004) and 6-fold (P < 0.01) IL-1beta secretion, respectively by HOK-18A. Interestingly, CD70, CD80, and CD86 were generally decreased upon bacteria and LPS challenge on HOK-18A. The effects of increased MHC Class II and decreased CD70 were also evident with challenge of human periradicular exudate on HOK-18A. The implications of the study are unique in that oral epithelial cells may play both activating and inhibitory roles in the host immune response towards infection by oral bacteria. We introduce a concept of 'dormancy' where the differential expression of key cell surface antigens on oral epithelial cells may keep the recruited immune effector cells in a state of unresponsiveness, thus contributing to the long term quiescent period observed in many periodontal and endodontic lesions.
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Affiliation(s)
- D C Han
- The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, UCLA School of Medicine and Dentistry, Los Angeles, CA 90095, USA
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48
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Jeong HW, Han DC, Son KH, Han MY, Lim JS, Ha JH, Lee CW, Kim HM, Kim HC, Kwon BM. Antitumor effect of the cinnamaldehyde derivative CB403 through the arrest of cell cycle progression in the G2/M phase. Biochem Pharmacol 2003; 65:1343-50. [PMID: 12694875 DOI: 10.1016/s0006-2952(03)00038-8] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cinnamaldehydes have been shown to have inhibitory effects on farnesyl protein transferase (FPTase; EC 2.5.1.29) in vitro, angiogenesis, cell-cell adhesion, and tumor cell growth and to be immunomodulators. However, the mechanisms responsible for these effects remain unknown. To elucidate the molecular mechanism of the cinnamaldehyde derivative CB403 for growth inhibition, CB403 was synthesized from 2'-hydroxycinnamaldehyde. CB403-treated cells were weakly adherent to the culture dishes. In addition, CB403 inhibited tumor growth in these cells in a concentration-dependent manner. FACS analysis using human cancer cells treated with this compound showed cell cycle arrest in mitosis, which was correlated with a marked increase in the amount of cyclin B1. Furthermore, CB403 blocked in vivo growth of human colon and breast tumor xenografts without loss of body weight in nude mice. These results support the hypothesis that the cinnamaldehyde derivative CB403 exerts cytostatic properties by inducing mitotic arrest in cancer cells.
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Affiliation(s)
- Ha-Won Jeong
- Korea Research Institute of Bioscience and Biotechnology, 52 Uendong Yoosunggu, Taejeon 305-600, South Korea
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Abstract
EphB1 is a member of the Eph family of receptor tyrosine kinases that play important roles in diverse biological processes including nervous system development, angiogenesis, and neural synapsis formation and maturation. Grb7 is an adaptor molecule implicated in the regulation of cell migration. Here we report identification of an interaction between Grb7 and the cytoplasmic domain of EphB1 by using Grb7 as a "bait" in a yeast two-hybrid screening. Co-immunoprecipitation was used to confirm the interaction of Grb7 with the cytoplasmic domain of EphB1 as well as the full-length receptor in intact cells. This interaction is mediated by the SH2 domain of Grb7 and requires tyrosine autophosphorylation of EphB1. Furthermore, Tyr-928 of EphB1 was identified as the primary binding site for Grb7. Stimulation of endogenous EphB1 in embryonal carcinoma P19 cells with its ligand ephrinB1 increased its association with Grb7, which is consistent with a role for the autophosphorylation of EphB1. We also found that EphB1 could phosphorylate Grb7 and mutation of either Tyr-928 or Tyr-594 to Phe decreased this activity. Finally, we show that EphB1 could stimulate fibroblast motility on extracellular matrix in a kinase-dependent manner, which also correlated with its association with Grb7. Consistent with this, co-expression of Grb7 with EphB1 further enhanced cell motility, whereas co-expression of the Grb7 SH2 domain abolished EphB1-stimulated cell migration. Together, our results identified a novel interaction between EphB1 with the adaptor molecule Grb7 and suggested that this interaction may play a role in the regulation of cell migration by EphB1.
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Affiliation(s)
- Dong Cho Han
- Department of Molecular Medicine, Cornell University, Ithaca, New York 14853, USA
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50
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Jeong HW, Lee HJ, Kho YH, Son KH, Han MY, Lim JS, Lee MY, Han DC, Ha JH, Kwon BM. Biological effects of G1 phase arrest compound, sesquicillin, in human breast cancer cell lines. Bioorg Med Chem 2002; 10:3129-34. [PMID: 12150857 DOI: 10.1016/s0968-0896(02)00225-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Sesquicillin, isolated from fungal fermentation broth, strongly induced G1 phase arrest in human breast cancer cells. During G1 phase arrest, the expression level of cyclin D1, cyclin A, and cyclin E was decreased, and the expression of CDK (cyclin-dependent-kinase) inhibitor, protein p21(Waf1/Cip1), was increased in a time-dependent manner in a breast cancer cell MCF-7. Interestingly, the G1 phase arrest induced by sesquicillin also occurred independently of the tumor suppressor protein, p53. Sesquicillin inhibits the proliferation of MCF-7 via G1 phase arrest in association with the induction of CDK inhibitor protein, p21(Waf1/Cip1), and the reduction of G1 phase related-cyclin proteins.
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Affiliation(s)
- Ha Won Jeong
- Korea Research Institute of Bioscience and Biotechnology, PO Box 115, Yoosung, Taejon, Republic of Korea
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