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Chi HT, Tram VN, Quan NT, Ly BTK. Andrographis paniculata methanol extract suppresses the phosphorylation of ETV6‑NTRK3. Biomed Rep 2023; 19:47. [PMID: 37383677 PMCID: PMC10293878 DOI: 10.3892/br.2023.1630] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 02/10/2023] [Indexed: 06/30/2023] Open
Abstract
ETS variant transcription factor 6 (ETV6)-neurotrophic receptor tyrosine kinase 3 (NTRK3) (EN) fusions are typically found in rare diseases, such as primary renal fibrosarcoma (only six cases have been reported), secretory carcinoma of the breast and salivary gland (1 case), and AML (4 cases). Few cases have been reported, and expression of the EN gene fusion requires additional clinical data and fundamental research to be supported. The aim of the present study was to determine the inhibitory effect of Andrographis paniculata methanol extract (MeAP) on EN-related cell lines, IMS-M2 and BaF3/EN, as well as evaluate the mechanism of action. Vero cells were used as control cells. Trypan blue staining and MTT were used to evaluate the inhibitory effect of MeAP on tested cells. Western blotting and immunoprecipitation were used to detect the activation of EN after MeAP treatment. The IC50 values of MeAP were found to be 12.38±0.57 µg/ml (IMS-M2) and 13.06±0.49 µg/ml (BaF3/EN). MeAP was observed to inhibit cell proliferation in a time, dose, and cell density-dependent manner. The IC50 value for MeAP in Vero cells was markedly higher, at 109.97±4.24 (µg/ml), indicating a much less sensitive effect. Furthermore, MeAP treatment inhibited EN phosphorylation and induced apoptosis in these cells. Collectively, the present study demonstrated that MeAP has an oncogenic effect on EN fusion-positive cell lines, in particular.
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Affiliation(s)
- Hoang Thanh Chi
- Department of Medicine and Pharmacy, Thu Dau Mot University, Thu Dau Mot, Binh Duong 820000, Vietnam
| | - Vo Ngoc Tram
- Department of Biology and Biotechnology, VNU University of Science, Vietnam National University, Ho Chi Minh City 72711, Vietnam
| | - Nguyen Trung Quan
- Department of Biology and Biotechnology, VNU University of Science, Vietnam National University, Ho Chi Minh City 72711, Vietnam
| | - Bui Thi Kim Ly
- Department of Medicine and Pharmacy, Thu Dau Mot University, Thu Dau Mot, Binh Duong 820000, Vietnam
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Chi HT, Thuong NTL, Ly BTK. Sphagneticola Trilobata (L.) Pruski (Asteraceae) Methanol Extract Induces Apoptosis in Leukemia Cells through Suppression of BCR/ABL. Plants (Basel) 2021; 10:plants10050980. [PMID: 34068907 PMCID: PMC8156756 DOI: 10.3390/plants10050980] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/08/2021] [Accepted: 05/11/2021] [Indexed: 11/16/2022]
Abstract
We will study the effects of the methanol extract of Sphagneticola trilobata (L.) Pruski (Asteraceae) (MeST) on the growth of leukemia cells that may contain the BCR/ABL gene. This study also clarifies the mechanism of this effect on these cells. For this purpose, the cells harboring wild-type BCR/ABL, imatinib-resistant BCR/ABL (K562 and TCCYT315I), or Ba/F3 cells transfected with wild-type or mutant BCR/ABL genes were used. The results showed that MeST effectively inhibited the viability of leukemia cells in both a dose- and time-dependent manner. The effect of MeST seems to be more sensitive in the cells that carry imatinib-resistant BCR/ABL (especially the T315I BCR/ABL mutation) than those with wild-type BCR/ABL. Furthermore, we have demonstrated that the death caused by MeST is apoptosis and the treatment with MeST could suppress the expression of BCR/ABL, subsequently altering the downstream cascade of BCR/ABL such as AKT and MAPK signaling. In conclusion, MeST has been able to suppress the growth of leukemia cells harboring BCR/ABL. The mechanism of the anti-leukemic effect of MeST on cells harboring imatinib-resistant BCR/ABL mutations could be due to the disruption of the BCR/ABL oncoprotein signaling cascade.
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Ly BTK, Chi HT. Combined effect of (-)-epigallocatechin-3-gallate and all-trans retinoic acid in FLT3-mutated cell lines. Biomed Rep 2020; 13:25. [PMID: 32765864 DOI: 10.3892/br.2020.1332] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 05/05/2020] [Indexed: 11/06/2022] Open
Abstract
Patents diagnosed with acute promyelocytic leukemia were treated with Vesanoid® [all-trans retinoic acid (ATRA)]. ATRA promotes the maturation and differentiation of leukemia cells and is therefore capable of reducing the symptoms of leukemia by preventing aggregation of myeloid cells. However, the clinical applications of ATRA are limited by its side effects, including acute retinoid resistance, hypertriglyceridemia, mucocutaneous dryness, nausea, brief recovery time relapse and drug resistance. Therefore, combinations of ATRA and other anticancer drugs are being investigated to overcome these limitations. In our previous study it was shown that in leukemia cells, (-)-epigallocatechin-3-gallate (EGCG) reduced cell proliferation and induced apoptotic cell death. In the present study, an in vitro evaluation of the effects of the combination of EGCG and ATRA on FLT3-mutated cell lines was performed using the isobologram method. The results showed that there was an additive effect in leukemic cells when treated with a combination of ATRA and EGCG. Thus, it was concluded that the cytotoxic effects of EGCG were improved by ATRA.
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Affiliation(s)
- Bui Thi Kim Ly
- Department of Food Technology, Ho Chi Minh City University of Technology Institute of Applied Sciences, Ho Chi Minh City University of Technology, Ho Chi Minh 72308, Vietnam.,Southern Key Laboratory of Biotechnology, Institute of Fungal Research and Biotechnology, Hanoi 12000, Vietnam
| | - Hoang Thanh Chi
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh 72915, Vietnam.,Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh 72915, Vietnam
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Vu HA, Phu ND, Khuong LT, Hoa PH, Nhu BTH, Nhan VT, Thanh LQ, Sinh ND, Chi HT, Quan ND, Binh NT. Recurrent BRCA1 Mutation, but no BRCA2 Mutation, in Vietnamese Patients with Ovarian Carcinoma Detected with Next Generation Sequencing. Asian Pac J Cancer Prev 2020; 21:2331-2335. [PMID: 32856862 PMCID: PMC7771942 DOI: 10.31557/apjcp.2020.21.8.2331] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Indexed: 12/24/2022] Open
Abstract
Background: Identification of germline and somatic BRCA1/2 mutations in ovarian cancer is important for genetic counseling and treatment decision making with poly ADP ribose polymerase inhibitors. Unfortunately, data on the frequency of BRCA1/2 mutations in Vietnamese patients are scare. Methods: We aim to explore the occurrence of BRCA1/2 mutations in 101 Vietnamese patients with ovarian cancer including serous (n = 58), endometrioid (n = 14), mucinous (n = 24), and clear cell (n = 5) carcinomas. BRCA1/2 mutations were detected from formalin-fixed parafin-embedded tumor samples using the OncomineTM BRCA Research Assay on Personal Genome Machine Platform with Ion Reporter Software for sequencing data analysis. The presence of pathogenic mutations was confirmed by Sanger sequencing. Results: We found no BRCA2 mutation in the entire cohort. Four types of pathogenic mutations in BRCA1 (Ser454Ter, Gln541Ter, Arg1751Ter, and Gln1779AsnfsTer14) were detected in 8 unrelated patients (7.9%) belonging to serous and endometrioid carcinoma groups. Except for the c.1360_1361delAG (Ser454Ter) mutation in BRCA1 exon 11 that was somatic, the other mutations in exons 11, 20, and 22 were germline. Interestingly, the recurrent Arg1751Ter mutation in BRCA1 exon 20 appeared in 4 patients, suggesting that this is a founder mutation in Vietnamese patients. Conclusion: Mutational analysis of tumor tissue using next generation sequencing allowed the detection of both germline and somatic BRCA1/2 mutations.
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Affiliation(s)
- Hoang Anh Vu
- Center for Molecular Biomedicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Ngo Dai Phu
- University of Science - Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Le Thai Khuong
- Center for Molecular Biomedicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | | | | | | | | | - Nguyen Duy Sinh
- Vinmec Central Park International Hospital, Ho Chi Minh City, Vietnam
| | - Hoang Thanh Chi
- Mekophar Chemical Pharmaceutical Joint Stock Company, Ho Chi Minh City, Vietnam
| | - Nguyen Dang Quan
- Biotechnology Center of Ho Chi Minh City, Ho Chi Minh City, Vietnam
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Thi Kim Ly B, My Ly D, Hoai Linh P, Kim Son H, Le Ha N, Thanh Chi H. Screening of medicinal herbs for cytotoxic activity to leukemia cells. J BUON 2020; 25:1989-1996. [PMID: 33099943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
PURPOSE This study aimed to find a new source of anti-leukemia agents from Vietnamese medicinal plants. METHODS The human leukemia cell lines TCCY, KU-812, TCC-S, KOPB-26, and HL60 were used. The crude ethanol extracts of 17 medicinal plants were collected and evaluated for their cytotoxicity against these leukemia cell lines by the trypan blue dye exclusion test. Morphological changes of cells were observed under phase-contrast inverted microscope. Bioactive compounds were evaluated using the method described by Ciulei. 2,2-diphenyl-1-picrylhydrazyl (DPPH) method was carried out for evaluating the antioxidant effect. RESULTS Among the tested samples, Artemisia vulgaris (A.vulgaris) crude ethanol extract effectively inhibited the viability of leukemia cell in both dose and time-dependent manner. The IC50 value was different for cell lines and ranged from 18.07±1.64 µg/ml to 45.87±3.49 µg/ml. Moreover, the phytoconstituents analysis results showed coumarin, flavonoid, anthocyanin, cardiac glycoside, tannins, reduced sugar compounds were present in the A.vulgaris extract. The total polyphenol and flavonoid contents of the dry extract were calculated as 3.81 mg GAE/g dry weight and 11.64 mg RUE/g dry weight of A.vulgaris. A.vulgaris exhibited antioxidant activity with IC50 is 145.10 ± 6.34 µg/ml. CONCLUSION Among the 17 Vietnamese plants used to treat a variety of cancer-related diseases, A.vulgaris has been able to suppress the growth of leukemia cells.
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Affiliation(s)
- Bui Thi Kim Ly
- Department of Food Technology, HUTECH Institute of Applied Sciences, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
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Thi Kim Ly B, Chi HT. Effects of green tea epigallocatechin-3-gallate on transcription factors regulating expression of FLT3. J BUON 2020; 25:549-553. [PMID: 32277682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
PURPOSE In our previous paper we previously reported that epigallocatechin-3-gallate (EGCG) inhibits FLT3 expression in cell lines harboring FLT3 mutations. In this research, we carried on to investigate the influence of EGCG on FLT3 promoter activity and FLT3 transcription. Methods The effect of EGCG on the mRNA expression of flt3 and flt3-promoter activity was evaluated using semiquantitative reverse transcription-PCR and luciferase reporter assay. The gene expression profiling analysis was done for detecting the effect of EGCG on flt3-transcription factors. Then, the protein level of C-MyB was obsvered using western blot analysis. RESULTS The results showed that EGCG reduced the transcription level of FLT3 by suppressing its promoter activity. By doing gene expression profile analysis in MOLM-13 cells established from acute monocytic leukemia patient with two mutations within FLT3 EXON 14 in a time-dependent manner, we found that the expression of mRNA of FLT3 was first observed to downregulate at 6 h together with the decreasing of Homeobox A9 (HOXA9) transcription factor after EGCG treatment. The changing of C/EBPα expression was found at 8 h. Interestingly, the reducing mRNA of c-Myb by EGCG was observed at 4 h, earlier than FLT3 was downregulated. There was no change in Meis Homeobox 1 (Meis1) by EGCG. We also found the protein level c-Myb was inhibited by EGCG in MOLM-13 and MOLM-14 cells after treating these cells with 60µM of EGCG for 8 h. CONCLUSION This data indicated the involvement of transcription factors in controlling the expression of FLT3 by EGCG.
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Affiliation(s)
- Bui Thi Kim Ly
- Department of Food Technology, HUTECH Institute of Applied Sciences, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
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Nguyen TTH, Dinh MH, Chi HT, Wang SL, Nguyen Q, Tran TD, Nguyen AD. Antioxidant and cytotoxic activity of lichens collected from Bidoup Nui Ba National Park, Vietnam. Res Chem Intermed 2018. [DOI: 10.1007/s11164-018-3628-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
FMS-like tyrosine kinase-3 fragments from exon 14 to the end without any mutations or deletions have been reported to fuse to ETV6 (TEL) in a few cases of myeloid/lymphoid neoplasms with eosinophilia carrying a translocation t(12;13)(p13;q12). This fusion protein confers constitutive activation on the FLT3 fragment and induces factor-independent growth in transfected Ba/F3 cells, indicating that it is an oncoprotein. However, the mechanism controlling the stability of this oncoprotein is unknown. In this study, we focus on finding factors controlling the stability of ETV6/FLT3. We have shown that the stability of ETV6/FLT3 is regulated by the Hsp90 chaperone. ETV6/FLT3 fusion protein forms a complex with Hsp90 by coimmunoprecipitation analyses using an Hsp90 antibody. The association between ETV6/FLT3 fusion protein and Hsp90 was impaired after treating ETV6/FLT3 transient transfection cos7 cells with 17-allylamino-17-demethoxygeldanamycin (17-AAG). 17-AAG induced a time- and dose-dependent downregulation of ectopically expressed ETV6/FLT3 protein in cos7 and HeLa-transfected cells. By using cycloheximide to block new protein translation, we found that 17-AAG accelerated the decay of ETV6/FLT3. Our findings could contribute to more understanding of the ETV6/FLT3 regulation through Hsp90 chaperone and open the way to finding effective treatment strategies for this rare disease.
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Affiliation(s)
- Bui Thi Kim Ly
- *Department of Food Biotechnology, Biotechnology Center of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hoang Thanh Chi
- †Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- ‡Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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Cuong NV, Truc VNT, Nhung NT, Thanh TT, Chieu TTB, Hieu TQ, Men NT, Mai HH, Chi HT, Boni MF, van Doorn HR, Thwaites GE, Carrique-Mas JJ, Hoa NT. Highly Pathogenic Avian Influenza Virus A/H5N1 Infection in Vaccinated Meat Duck Flocks in the Mekong Delta of Vietnam. Transbound Emerg Dis 2016; 63:127-35. [PMID: 26748550 PMCID: PMC4819680 DOI: 10.1111/tbed.12470] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Indexed: 11/26/2022]
Abstract
We investigated episodes of suspected highly pathogenic avian influenza (HPAI)-like illness among 12 meat duck flocks in two districts in Tien Giang province (Mekong Delta, Vietnam) in November 2013. In total, duck samples from 8 of 12 farms tested positive for HPAI virus subtype A/haemagglutinin 5 and neuraminidase 1 (H5N1) by real-time RT-PCR. Sequencing results confirmed clade of 2.3.2.1.c as the cause of the outbreaks. Most (7/8) laboratory-confirmed positive flocks had been vaccinated with inactivated HPAI H5N1 clade 2.3.4 vaccines <6 days prior to onset of clinical signs. A review of vaccination data in relation to estimated production in the area suggested that vaccination efforts were biased towards larger flocks and that vaccination coverage was low [21.2% ducks vaccinated with two shots (range by district 7.4-34.9%)]. The low-coverage data, the experimental evidence of lack of cross-protection conferred by the currently used vaccines based on clade 2.3.4 together with the short lifespan of meat duck flocks (60-70 days), suggest that vaccination is not likely to be effective as a tool for control of H5N1 infection in meat duck flocks in the area.
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Affiliation(s)
- N V Cuong
- Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Hospital for Tropical Disease, Ho Chi Minh City, Vietnam
| | - V N T Truc
- Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Hospital for Tropical Disease, Ho Chi Minh City, Vietnam
- University of Science, Ho Chi Minh City, Vietnam
| | - N T Nhung
- Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Hospital for Tropical Disease, Ho Chi Minh City, Vietnam
| | - T T Thanh
- Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Hospital for Tropical Disease, Ho Chi Minh City, Vietnam
| | - T T B Chieu
- Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Hospital for Tropical Disease, Ho Chi Minh City, Vietnam
| | - T Q Hieu
- Sub-Department of Animal Health, Tien Giang Province, Vietnam
| | - N T Men
- Sub-Department of Animal Health, Tien Giang Province, Vietnam
| | - H H Mai
- Sub-Department of Animal Health, Tien Giang Province, Vietnam
| | - H T Chi
- Sub-Department of Animal Health, Tien Giang Province, Vietnam
| | - M F Boni
- Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Hospital for Tropical Disease, Ho Chi Minh City, Vietnam
- Centre for Tropical Medicine, Nuffield Department of Medicine, University of Oxford, UK
| | - H R van Doorn
- Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Hospital for Tropical Disease, Ho Chi Minh City, Vietnam
- Centre for Tropical Medicine, Nuffield Department of Medicine, University of Oxford, UK
| | - G E Thwaites
- Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Hospital for Tropical Disease, Ho Chi Minh City, Vietnam
- Centre for Tropical Medicine, Nuffield Department of Medicine, University of Oxford, UK
| | - J J Carrique-Mas
- Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Hospital for Tropical Disease, Ho Chi Minh City, Vietnam
- Centre for Tropical Medicine, Nuffield Department of Medicine, University of Oxford, UK
| | - N T Hoa
- Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Hospital for Tropical Disease, Ho Chi Minh City, Vietnam
- Centre for Tropical Medicine, Nuffield Department of Medicine, University of Oxford, UK
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Chi HT, Ly BTK, Vu HA, Sato Y, Dung PC, Xinh PT. Synergistic effect of all‑trans retinoic acid in combination with protein kinase C 412 in FMS-like tyrosine kinase 3-mutated acute myeloid leukemia cells. Mol Med Rep 2015; 11:3969-75. [PMID: 25592076 DOI: 10.3892/mmr.2015.3203] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 11/20/2014] [Indexed: 11/06/2022] Open
Abstract
Acute myeloid leukemia (AML) is a heterogeneous disease. Numerous molecular abnormalities have been identified in AML and, amongst these, FMS‑like tyrosine kinase 3 (FLT3) mutations are one of the most common somatic alterations detected. In the present study, an in vitro investigation was performed to evaluate the effects of all‑trans retinoic acid (ATRA) and PKC412, alone and in combination, in FLT3‑mutated AML cell lines. Trypan blue exclusion test, as well as morphological, western blot and isobologram analyses were conducted. The results indicated that the combined ATRA and PKC412 treatment exhibited additive or synergistic effects in FLT3‑mutated AML cell lines. These results provided in vitro evidence for the future clinical trials evaluating the effects of a combination treatment using PKC412 and ATRA on AML patients with FLT3‑mutations.
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Affiliation(s)
- Hoang Thanh Chi
- Department of Molecular Cytogenetics, Blood Transfusion and Hematology Hospital Ho Chi Minh City, Ho Chi Minh City 711512, Vietnam
| | - Bui Thi Kim Ly
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Tokyo 108‑8639, Japan
| | - Hoang Anh Vu
- Center for Molecular Biomedicine, The University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City 748908, Vietnam
| | - Yuko Sato
- Japanese Red Cross College of Nursing, Tokyo 150‑0012, Japan
| | - Phu Chi Dung
- Department of First Pediatric Hematology, Blood Transfusion and Hematology Hospital Ho Chi Minh City, Ho Chi Minh City 711512, Vietnam
| | - Phan Thi Xinh
- Department of Molecular Cytogenetics, Blood Transfusion and Hematology Hospital Ho Chi Minh City, Ho Chi Minh City 711512, Vietnam
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Chi HT, Ly BTK, Vu HA, Sato Y, Dung PC, Xinh PT. Down-regulated expression of NPM1 in IMS-M2 cell line by (-)-epigallocatechin-3-gallate. Asian Pac J Trop Biomed 2014; 4:570-4. [PMID: 25183279 DOI: 10.12980/apjtb.4.2014apjtb-2014-0177] [Citation(s) in RCA: 8] [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: 05/15/2014] [Accepted: 07/23/2014] [Indexed: 01/07/2023] Open
Abstract
OBJECTIVE To investigate the inhibited effect of epigallocatechin-3-gallate (EGCG) on the expression of NPM1 in IMS-M2 cells harboring the NPM1 mutations. METHODS Cell proliferation assay was performed to test the effects of EGCG on cell growth of IMS-M2 cells harboring the NPM1 mutations. Western blot analysis were performed to test the protein expression of NPM1, AKT, those associated with apoptosis. RESULTS EGCG can down-regulate the expression of NPM1 in IMS-M2 cells harboring the NPM1 mutations. Moreover, EGCG also suppressed the cell proliferation and induced apoptosis in IMS-M2 cells. CONCLUSIONS The results suggested that EGCG could be considered as a reagent for treatment of AML patients with NPM1 mutations.
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Affiliation(s)
- Hoang Thanh Chi
- Department of Molecular Cytogenetics, Hematology and Blood Transfusion Hospital in Ho Chi Minh City, Ho Chi Minh, Vietnam
| | - Bui Thi Kim Ly
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, the University of Tokyo, Tokyo, Japan
| | - Hoang Anh Vu
- Center for Molecular Biomedicine, The University of Medicine and Pharmacy-Ho Chi Minh City, Ho Chi Minh, Vietnam
| | - Yuko Sato
- Basic nursing science, The Japanese Red Cross College of Nursing Japan, Tokyo, Japan
| | - Phu Chi Dung
- Department of Molecular Cytogenetics, Hematology and Blood Transfusion Hospital in Ho Chi Minh City, Ho Chi Minh, Vietnam
| | - Phan Thi Xinh
- Department of Molecular Cytogenetics, Hematology and Blood Transfusion Hospital in Ho Chi Minh City, Ho Chi Minh, Vietnam ; Center for Molecular Biomedicine, The University of Medicine and Pharmacy-Ho Chi Minh City, Ho Chi Minh, Vietnam
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Ly BTK, Chi HT, Yamagishi M, Kano Y, Hara Y, Nakano K, Sato Y, Watanabe T. Inhibition of FLT3 expression by green tea catechins in FLT3 mutated-AML cells. PLoS One 2013; 8:e66378. [PMID: 23840454 PMCID: PMC3688791 DOI: 10.1371/journal.pone.0066378] [Citation(s) in RCA: 19] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 05/06/2013] [Indexed: 12/24/2022] Open
Abstract
Acute myeloid leukemia (AML) is a heterogeneous disease characterized by a block in differentiation and uncontrolled proliferation. FLT3 is a commonly mutated gene found in AML patients. In clinical trials, the presence of a FLT3-ITD mutation significantly correlates with an increased risk of relapse and dismal overall survival. Therefore, activated FLT3 is a promising molecular target for AML therapies. In this study, we have shown that green tea polyphenols including (-)-epigallocatechin-3-gallate (EGCG), (-)-epigallocatechin (EGC), and (-)-epicatechin-3-gallate (ECG) suppress the proliferation of AML cells. Interestingly, EGCG, EGC and ECG showed the inhibition of FLT3 expression in cell lines harboring FLT3 mutations. In the THP-1 cells harboring FLT3 wild-type, EGCG showed the suppression of cell proliferation but did not suppress the expression of FLT3 even at the concentration that suppress 100% cell proliferation. Moreover, EGCG-, EGC-and ECG-treated cells showed the suppression of MAPK, AKT and STAT5 phosphorylation. Altogether, we suggest that green tea polyphenols could serve as reagents for treatment or prevention of leukemia harboring FLT3 mutations.
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Affiliation(s)
- Bui Thi Kim Ly
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, University of Tokyo, Tokyo, Japan
| | - Hoang Thanh Chi
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, University of Tokyo, Tokyo, Japan
- * E-mail:
| | - Makoto Yamagishi
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, University of Tokyo, Tokyo, Japan
| | - Yasuhiko Kano
- Division of Hematology, Tochigi Cancer Center, Utsunomiya, Tochigi, Japan
| | - Yukihiko Hara
- Tea Solution, Hara Office Inc., Sumida-ku, Tokyo, Japan
| | - Kazumi Nakano
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, University of Tokyo, Tokyo, Japan
| | - Yuko Sato
- The Japanese Red Cross College of Nursing, Shibuya-ku, Tokyo, Japan
| | - Toshiki Watanabe
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, University of Tokyo, Tokyo, Japan
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Chi HT, Ly BTK, Kano Y, Tojo A, Watanabe T, Sato Y. ETV6–NTRK3 as a therapeutic target of small molecule inhibitor PKC412. Biochem Biophys Res Commun 2012; 429:87-92. [DOI: 10.1016/j.bbrc.2012.10.087] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Accepted: 10/25/2012] [Indexed: 10/27/2022]
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Aziz AA, Chi HT, Dauphinee W, Davenport D, Gonzales R, Jaeger H, Kipor GV, Mares CA, Shrestha RP, Yoshinaga K. Theme 4. Effective Models for Medical and Health Response Coordination: Summary and Action Plan. Prehosp Disaster Med 2012; 16:33-5. [PMID: 11367937 DOI: 10.1017/s1049023x0002553x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
AbstractIntroduction:To effectively respond to this relatively new, complex mandate it is essential to find effective models of coordination to ensure that medical and health services can meet the standards now expected in a disaster situation. This theme explored various models, noting both the strengths that can be built on and the weaknesses that still need to be overcome.Methods:Details of the methods used are provided in the preceding paper. The chairs moderated all presentations and produced a summary that was presented to an assembly of all of the delegates. Since the findings from the Theme 1 and Theme 4 groups were similar, the chairs of both groups presided over one workshop that resulted in the generation of a set of Action Plans that then were reported to the collective group of all delegates.Results:The main points developed during the presentations and discussion included: (1) preplanning (predisaster goals), (2) information collection (assessment), (3) communication (materials and methods); and (4) response centres and personnel. There exists a need for institutionalization of processes for learning from experiences obtained from disasters.Discussion:Action plans presented include: (1) creation of an information and data clearinghouse on disaster management, (2) identification of incentives and disincentives for readiness and develop strategies and interventions, and (3) action on lessons learned from evidence-based research and practical experience.Conclusions:There is an urgent need to proactively establish coordination and management procedures in advance of any crisis. A number of important insights for improvement in coordination and management during disasters emerged.
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Affiliation(s)
- A A Aziz
- [U.S.] Centers for Disease Control and Prevention (CDC), Atlanta, Georgia, USA
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Chi HT, Vu HA, Iwasaki R, Nagamura F, Tojo A, Watanabe T, Sato Y. Detection of exon 12 type A mutation of NPM1 gene in IMS-M2 cell line. Leuk Res 2010; 34:261-2. [PMID: 19854508 DOI: 10.1016/j.leukres.2009.09.019] [Citation(s) in RCA: 9] [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: 09/09/2009] [Revised: 09/12/2009] [Accepted: 09/12/2009] [Indexed: 10/20/2022]
Abstract
Nucleophosmin 1 (NPM1), a protein that shuttles between the nucleus and cytoplasm, is mostly located in nucleoli. This is a multifunctional phosphoprotein to which both tumor-suppressor and oncogenic functions have been attributed. Here, we have found the cell line with the type A NPM1 mutation and with the other genetic alterations including ETV6-NTRC fusion. It will provide a good in vitro model for bio-molecular studies of interaction of mutated NPM1 gene and other genetic abnormalities as well as a useful tool for developing new molecularly targeted drugs.
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Affiliation(s)
- Hoang Thanh Chi
- Division of Ultrafine Structure, Department of Pathology, Research Institute of International Medical Center of Japan, Toyama 1-21-1, Shinjuku-ku, Tokyo 162-8655, Japan
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Chi HT, Vu HA, Iwasaki R, Thao LB, Hara Y, Taguchi T, Watanabe T, Sato Y. Green tea (-)-epigalocatechin-3-gallate inhibits KIT activity and causes caspase-dependent cell death in gastrointestinal stromal tumor including imatinib-resistant cells. Cancer Biol Ther 2009; 8:1934-9. [PMID: 19770581 DOI: 10.4161/cbt.8.20.9594] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Imatinib, a selective tyrosine kinase inhibitor, has been used as a standard first-line therapy for gastrointestinal stromal tumor (GIST) patients. Unfortunately, most patients responding to imatinib will eventually exhibit the resistance, the cause of which is not fully understood. The serious clinical problems of imatinib-resistance demand alternative treatment strategy. (-)-Epigallocatechin-3-gallate (EGCG), a main component of green tea catechin, has been demonstrated potential anti-tumor effects on various types of cancer cells. Here, we report for the first time that EGCG has shown anti-tumor effects on gastrointestinal stromal tumor cell line GIST-T1 by suppressing cell proliferation and eventually inducing cell death via caspase-dependent pathways. GIST-T1 and imatinib resistant GIST-T1 (GIST-T1 IR) cells were used to assess the effects of EGCG. In both cell types, KIT activity was completely inhibited after 4 h treatment with 60 muM EGCG. EGCG specifically inhibited activated KIT, which was demonstrated by using Ba/F3 cells transfected with human wild-type KIT construct. At a dose of 30 muM EGCG, the KIT activity remains but at more than 40 muM EGCG, the KIT activity was abolished in these transfected-Ba/F3 cells. Our results suggest that EGCG has a promising potential as a natural KIT inhibitor and therefore it could be used as a novel therapeutic or preventive reagent for GISTs including the imatinib-resistant cases.
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Affiliation(s)
- Hoang Thanh Chi
- Division of Ultrafine Structure, Department of Pathology, Research Institute of International Medical Center of Japan, Tokyo, Japan
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Abstract
The toad possesses several toxic substances. Toad toxin poisoning manifests itself primarily with digitalis-like, cardioactive effects which results in bradycardia, varying degrees of atrio-ventricular block, ventricular tachycardia, ventricular fibrillation and sudden death. We report a cluster poisoning in a family who became intoxicated after ingestion of cooked toad soup for a skin problem. The youngest one (15 months old) died of refractory bradydyarrhythmias soon after arriving at our hospital. A second child (20 months old), who survived, arrived in shock with hyperkalemia (potassium 7.3 mEq/ L) and varying degrees of atrio-ventricular block. She was successfully treated with atropine, lidocaine, and cardioversion, and had a transvenous temporary pacemaker implanted for 1 day. The third boy (16 years old) had hyperkalemia (potassium 6.3 mEq/L) and bradycardia. The remaining three adults had only mild symptoms of nausea, vomiting, watery diarrhea and a sensation of numbness over their oral mucosa. We found that the level of serum potassium had prognostic implications in toad intoxication. Determination of serum potassium level is readily available in almost every hospital and is therefore more convenient to measure than serum digoxin level. We conclude that if hyperkalemia develops, the treatment of toad intoxication must be more aggressive to prevent mortality.
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Affiliation(s)
- H T Chi
- Department of Emergency Medicine, Taichung Veterans General Hospital, Taiwan, Republic of China
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Abstract
In simulated stomach acid (aqueous 0.01 M HCl, 37 degrees C) beta-arteether decomposed (half-life, 441 +/- 17 min) to dihydroartemisinin, which subsequently rearranged to a new compound (1) having an endoperoxide group and an aldehyde group. The in vitro antimalarial activity of dihydroartemisinin is similar to that of beta-arteether, whereas compound 1 had approximately 1/10th the activity of beta-arteether. Compound 1 was prepared in sufficient quantities to afford samples for biological evaluation and a complete chemical characterization with 1H- and 13C-NMR and mass spectrometry. While beta-arteether would be somewhat unstable in the stomach, if the drug were administered on an empty stomach (emptying time, approximately 30 min) as a suspension or tablet, sufficient quantities of intact arteether may reach the small intestines, where it would be stable and readily absorbed. Its decomposition products, dihydroartemisinin and 1, may also contribute to the antimalarial activity of the administered drug following oral administration.
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Affiliation(s)
- J K Baker
- Department of Medicinal Chemistry, School of Pharmacy, University of Mississippi University 38677
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Chi HT, Ramu K, Baker JK, Hufford CD, Lee IS, Zeng YL, McChesney JD. Identification of the in vivo metabolites of the antimalarial arteether by thermospray high-performance liquid chromatography/mass spectrometry. Biol Mass Spectrom 1991; 20:609-28. [PMID: 1793739 DOI: 10.1002/bms.1200201006] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The thermospray mass spectra of arteether and 16 of its potential metabolites all showed strong [M + NH4]+ ions and with only a few exceptions these compounds also showed spectral peaks corresponding to [M + NH4 - HOR]+ and [M + H - HOR]+, where OR represents the alkoxy or hydroxy group at the 12-position. A method for quantifying the metabolites was developed in which the plasma was spiked with an internal standard (the propyl ether analog of arteether), extracted using a C-18 solid-phase cartridge, then subjected to thermospray high-performance liquid chromatographic/mass spectrometric analysis using selected ion monitoring and a C-18 reversed-phase analytical column. Following the intravenous administration of arteether (11.6 mg kg-1), the plasma was found to contain 12 metabolites of arteether in the 10-1000 ng ml-1 range 15 min post-injection, and within 60 min two of these metabolites attained higher concentrations than that of the parent compound, while several other of the metabolites attained concentrations similar to the parent compound. The pseudo-first-order half-life of arteether was found to be 10.0 +/- 0.6 min, while the apparent half-lives of most of the metabolites were in the 15-30 min range. Nine of these metabolites were identified by comparison to authentic reference standards and the structures of three remaining metabolites were tentatively assigned from their spectral and chromatographic properties. The metabolic pathways leading to these 12 metabolites was a rather complex, multiple-step process, but most of the metabolites arose from an enzymatic oxidation at one of three sites; 3 alpha, 9 alpha, or the CH2 of the side-chain. Conversion of the endoperoxide group to an cyclic ether was not a major pathway. The in vitro antimalarial activity of reference standards of several of the metabolites was determined and all of those tested were found to be active in the low nanogram per milliliter range.
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Affiliation(s)
- H T Chi
- Department of Medicinal Chemistry, School of Pharmacy, University of Mississippi, University 38677
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Hufford CD, Lee IS, ElSohly HN, Chi HT, Baker JK. Structure elucidation and thermospray high-performance liquid chromatography/mass spectroscopy (HPLC/MS) of the microbial and mammalian metabolites of the antimalarial arteether. Pharm Res 1990; 7:923-7. [PMID: 2235891 DOI: 10.1023/a:1015993722846] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [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: 12/30/2022]
Abstract
Microbial metabolism studies of the antimalarial drug arteether (1) have shown that arteether is metabolized to six new metabolites in addition to those previously reported (3). Large-scale fermentations with Cunninghamella elegans (ATCC 9245) and Streptomyces lavendulae (L-105) have resulted in the characterization of these metabolites primarily by two-dimensional nuclear magnetic resonance (2D-NMR) methods as 9 beta-hydroxyarteether (2), a ring rearrangement metabolite (3), 3 alpha-hydroxy-11-epi-deoxydihydroartemisinin (4), 9 alpha-hydroxyarteether (5), 2 alpha-hydroxyarteether (6), and 14-hydroxyarteether (7). Thermospray mass spectroscopy/high-performance liquid chromatographic analyses have shown that four of these metabolites (2, 5, 6, 7) are also present in rat liver microsome preparations.
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Affiliation(s)
- C D Hufford
- Department of Pharmacognosy, School of Pharmacy, University of Mississippi, University 38677
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