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Takasaki T, Hamabe Y, Touchi K, Khandakar GI, Ueda T, Okada H, Sakai K, Nishio K, Tanabe G, Sugiura R. ACA-28, an ERK MAPK Signaling Modulator, Exerts Anticancer Activity through ROS Induction in Melanoma and Pancreatic Cancer Cells. Oxid Med Cell Longev 2024; 2024:7683793. [PMID: 38500550 PMCID: PMC10948229 DOI: 10.1155/2024/7683793] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 02/19/2024] [Accepted: 02/27/2024] [Indexed: 03/20/2024]
Abstract
The extracellular signal-regulated kinase (ERK) MAPK pathway is dysregulated in various human cancers and is considered an attractive therapeutic target for cancer. Therefore, several inhibitors of this pathway are being developed, and some are already used in the clinic. We have previously identified an anticancer compound, ACA-28, with a unique property to preferentially induce ERK-dependent apoptosis in melanoma cells. To comprehensively understand the biological cellular impact induced by ACA-28, we performed a global gene expression analysis of human melanoma SK-MEL-28 cells exposed to ACA-28 using a DNA microarray. The transcriptome analysis identified nuclear factor erythroid 2-related factor 2 (Nrf2), a master transcription factor that combats oxidative stress, as the most upregulated genetic pathway after ACA-28 treatment. Consistently, ACA-28 showed properties to increase the levels of reactive oxygen species (ROS) as well as Nrf2 protein, which is normally repressed by proteasomal degradation and activated in response to oxidative stresses. Furthermore, the ROS scavenger N-acetyl cysteine significantly attenuated the anticancer activity of ACA-28. Thus, ACA-28 activates Nrf2 signaling and exerts anticancer activity partly via its ROS-stimulating property. Interestingly, human A549 cancer cells with constitutively high levels of Nrf2 protein showed resistance to ACA-28, as compared with SK-MEL-28. Transient overexpression of Nrf2 also increased the resistance of cells to ACA-28, while knockdown of Nrf2 exerted the opposite effect. Thus, upregulation of Nrf2 signaling protects cancer cells from ACA-28-mediated cell death. Notably, the Nrf2 inhibitor ML385 substantially enhanced the cell death-inducing property of ACA-28 in pancreatic cancer cells, T3M4 and PANC-1. Our data suggest that Nrf2 plays a key role in determining cancer cell susceptibility to ACA-28 and provides a novel strategy for cancer therapy to combine the Nrf2 inhibitor and ACA-28.
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Affiliation(s)
- Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Yasuyuki Hamabe
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Kenta Touchi
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Golam Iftakhar Khandakar
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Takeshi Ueda
- Department of Biochemistry, Faculty of Medicine, Kindai University, Osaka 589-8511, Japan
- Anti-Aging Center, Kindai University, Osaka 577-8502, Japan
| | - Hitoshi Okada
- Department of Biochemistry, Faculty of Medicine, Kindai University, Osaka 589-8511, Japan
- Anti-Aging Center, Kindai University, Osaka 577-8502, Japan
| | - Kazuko Sakai
- Department of Genome Biology, Faculty of Medicine, Kindai University, Osaka 589-8511, Japan
| | - Kazuto Nishio
- Department of Genome Biology, Faculty of Medicine, Kindai University, Osaka 589-8511, Japan
| | - Genzoh Tanabe
- Laboratory of Organic Chemistry, Department of Pharmacy, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
- Anti-Aging Center, Kindai University, Osaka 577-8502, Japan
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Takasaki T, Obana R, Fujiwara D, Tomimoto N, Khandakar GI, Satoh R, Sugiura R. ACA-28, an anticancer compound, induces Pap1 nuclear accumulation via ROS-dependent and -independent mechanisms in fission yeast. MicroPubl Biol 2023; 2023:10.17912/micropub.biology.000711. [PMID: 37720683 PMCID: PMC10502506 DOI: 10.17912/micropub.biology.000711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 08/08/2023] [Accepted: 08/28/2023] [Indexed: 09/19/2023]
Abstract
The nucleocytoplasmic transport of proteins is an important mechanism to control cell fate. Pap1 is a fission yeast nucleocytoplasmic shuttling transcription factor of which localization is redox regulated. The nuclear export factor Crm1/exportin negatively regulates Pap1 by exporting it from the nucleus to the cytoplasm. Here, we describe the effect of an anti-cancer compound ACA-28, an improved derivative of 1'-acetoxychavicol acetate (ACA), on the subcellular distribution of Pap1. ACA-28 induced nuclear accumulation of Pap1 more strongly than did ACA. ROS inhibitor N-acetyl-L-cysteine (NAC) partly antagonized the Pap1 nuclear accumulation induced by ACA-28. NAC almost abolished Pap1 nuclear localization upon H 2 O 2 , whereas leptomycin B (LMB)-mediated inhibition of Pap1 nuclear export was resistant to NAC. Collectively, ACA-28-mediated apoptosis in cancer cells may involve ROS-dependent and -independent mechanisms.
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Affiliation(s)
- Teruaki Takasaki
- Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
| | - Reo Obana
- Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
| | - Daiki Fujiwara
- Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
| | - Naofumi Tomimoto
- Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
| | | | - Ryosuke Satoh
- Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
| | - Reiko Sugiura
- Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
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Takasaki T, Utsumi R, Shimada E, Bamba A, Hagihara K, Satoh R, Sugiura R. Atg1, a key regulator of autophagy, functions to promote MAPK activation and cell death upon calcium overload in fission yeast. Microb Cell 2023; 10:133-140. [PMID: 37275474 PMCID: PMC10236205 DOI: 10.15698/mic2023.06.798] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 04/21/2023] [Accepted: 04/26/2023] [Indexed: 06/07/2023]
Abstract
Autophagy promotes or inhibits cell death depending on the environment and cell type. Our previous findings suggested that Atg1 is genetically involved in the regulation of Pmk1 MAPK in fission yeast. Here, we showed that Δatg1 displays lower levels of Pmk1 MAPK phosphorylation than did the wild-type (WT) cells upon treatment with a 1,3-β-D-glucan synthase inhibitor micafungin or CaCl2, both of which activate Pmk1. Moreover, the overproduction of Atg1, but not that of the kinase inactivating Atg1D193A activates Pmk1 without any extracellular stimuli, suggesting that Atg1 may promote Pmk1 MAPK signaling activation. Notably, the overproduction of Atg1 induces a toxic effect on the growth of WT cells and the deletion of Pmk1 failed to suppress the cell death induced by Atg1, indicating that the Atg1-mediated cell death requires additional mechanism(s) other than Pmk1 activation. Moreover, atg1 gene deletion induces tolerance to micafungin and CaCl2, whereas pmk1 deletion induces severe sensitivities to these compounds. The Δatg1Δpmk1 double mutants display intermediate sensitivities to these compounds, showing that atg1 deletion partly suppressed growth inhibition induced by Δpmk1. Thus, Atg1 may act to promote cell death upon micafungin and CaCl2 stimuli regardless of Pmk1 MAPK activity. Since micafungin and CaCl2 are intracellular calcium inducers, our data reveal a novel role of the autophagy regulator Atg1 to induce cell death upon calcium overload independent of its role in Pmk1 MAPK activation.
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Affiliation(s)
- Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan
| | - Ryosuke Utsumi
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan
| | - Erika Shimada
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan
| | - Asuka Bamba
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan
| | - Kanako Hagihara
- Laboratory of Hygienic Science, Department of Pharmacy, Hyogo Medical University, Kobe, 650-8530, Japan
| | - Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan
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Khandakar GI, Miyamoto Y, Satoh R, Kishimoto K, Xie M, Shih M, Takasaki T, Tanabe G, Oka M, Sugiura R. ACAGT-007a, an anti-cancer compound that modulates ERK MAPK signaling, induces nuclear enrichment of phosphorylated ERK in T3M4 pancreatic cancer cells. Genes Cells 2023. [PMID: 36945130 DOI: 10.1111/gtc.13026] [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: 01/28/2023] [Revised: 03/11/2023] [Accepted: 03/19/2023] [Indexed: 03/23/2023]
Abstract
The extracellular-signal-regulated-kinase (ERK) signaling pathway is essential for cell proliferation and is frequently deregulated in human tumors such as pancreatic cancers. ACAGT-007a (GT-7), an anti-cancer compound, stimulates ERK phosphorylation, thereby inducing growth inhibition and apoptosis in T3M4 pancreatic cancer cells. However, how GT-7 stimulates ERK phosphorylation and induces apoptosis in ERK-active T3M4 cells remains unclear. To look into the mechanism, we performed a spatiotemporal analysis of ERK phosphorylation mediated by GT-7 in T3M4 cells. The immunoblotting showed that GT-7 stimulates ERK phosphorylation within 1 hr, which was more remarkable after 2 hr. Importantly, apoptosis induction as evaluated by the cleaved Caspase-3 was observed only after 2 hr incubation with GT-7. The immunofluorescence staining revealed the enrichment of phosphorylated ERK (phospho-ERK) in the nucleus upon 1 hr incubation with GT-7. Fractionation experiments showed that GT-7 increases phospho-ERK levels in the cytoplasm within 1 hr, whereas nuclear phospho-ERK accumulation is observed after 2 hr incubation with GT-7. MEK inhibition by U0126 significantly diminishes nuclear phospho-ERK distribution and apoptosis induction stimulated by GT-7. Thus, GT-7 may initiate the induction of ERK phosphorylation in the cytoplasm, which leads to phospho-ERK enrichment in the nucleus. This nuclear phospho-ERK accumulation by GT-7 precedes and may underlie apoptosis induction in T3M4.
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Affiliation(s)
| | - Yoichi Miyamoto
- Laboratory of Nuclear Transport Dynamics, National Institute of Biomedical Innovation, Health and Nutrition
| | - Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences
| | - Kenta Kishimoto
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences
| | - Mingzuo Xie
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences
| | - Mengyu Shih
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences
| | - Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences
| | - Genzoh Tanabe
- Laboratory of Organic Chemistry, Department of Pharmacy, Kindai University, Kowakae 3-4-1, Higashi-Osaka, 577-8502, Japan
| | - Masahiro Oka
- Laboratory of Nuclear Transport Dynamics, National Institute of Biomedical Innovation, Health and Nutrition
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences
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Satoh R, Tanaka T, Yoshida N, Tanaka C, Takasaki T, Sugiura R. Fission Yeast PUF Proteins Puf3 and Puf4 Are Novel Regulators of PI4P5K Signaling. Biol Pharm Bull 2023; 46:163-169. [PMID: 36724944 DOI: 10.1248/bpb.b22-00569] [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] [Indexed: 02/03/2023]
Abstract
Phosphatidylinositol-4-phosphate 5-kinase (PI4P5K) is a highly conserved enzyme that generates phosphatidylinositol-4,5-bisphosphate (PI(4,5)P2) by phosphorylating phosphatidylinositol 4-phosphate (PI(4)P). Schizosaccharomyces pombe (S. pombe) its3-1 is a loss-of-function mutation in the essential its3+ gene that encodes a PI4P5K. Its3 regulates cell proliferation, cytokinesis, cell integrity, and membrane trafficking, but little is known about the regulatory mechanisms of Its3. To identify regulators of Its3, we performed a genetic screening utilizing the high-temperature sensitivity (TS) of its3-1 and identified puf3+ and puf4+, encoding Pumilio/PUF family RNA-binding proteins as multicopy suppressors of its3-1 cells. The deletions of the PUF domains in the puf3+ and puf4+ genes resulted in the reduced ability to suppress its3-1, suggesting that the suppression by Puf3 and Puf4 may involve their RNA-binding activities. The gene knockout of Puf4, but not that of Puf3, exacerbated the TS of its3-1. Interestingly, mutant Its3 expression levels both at mRNA and protein levels were lower than those of the wild-type (WT) Its3. Consistently, the overexpression of the mutant its3-1 gene suppressed the its3-1 phenotypes. Notably, Puf3 and Puf4 overexpression increased the mRNA and protein expression levels of both Its3 and Its3-1. Collectively, our genetic screening revealed a functional relationship between the Pumilio/PUF family RNA-binding proteins and PI4P5K.
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Affiliation(s)
- Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University
| | - Taemi Tanaka
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University
| | - Nobuyasu Yoshida
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University
| | - Chiaki Tanaka
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University
| | - Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University
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Takasaki T, Utsumi R, Shimada E, Tomimoto N, Satoh R, Sugiura R. Autophagy-related genes genetically interact with Pmk1 MAPK signaling in fission yeast. MicroPubl Biol 2022; 2022:10.17912/micropub.biology.000618. [PMID: 35996690 PMCID: PMC9391948 DOI: 10.17912/micropub.biology.000618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 07/24/2022] [Accepted: 08/01/2022] [Indexed: 11/16/2022]
Abstract
Apart from the highly conserved role in the cellular degradation process, autophagy also appears to play a key role in cellular proliferation. Here, we describe the genetic interaction of autophagy-related genes and Pmk1 MAPK signaling in fission yeast. atg1 deletion cells (Δ atg1 ) exhibit the vic (viable in the presence of immunosuppressant and Cl - ) phenotype, indicative of Pmk1 signaling inhibition. Moreover, the Δ atg1 Δ pmk1 double mutant resembles the single Δ pmk1 mutant, suggesting that Atg1 functions in the Pmk1 pathway. In addition, the growth defect induced by overexpression of Pck2, an upstream activator of Pmk1 MAPK was alleviated by the deletion of atg1 + . Finally, the deletion of autophagy-related genes recapitulates Pmk1 MAPK signaling inhibition. Our data suggest a novel role for autophagy in MAPK signaling regulation.
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Affiliation(s)
- Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
| | - Ryosuke Utsumi
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
| | - Erika Shimada
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
| | - Naofumi Tomimoto
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
| | - Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashiosaka, Osaka, Japan
,
Correspondence to: Reiko Sugiura (
)
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Khandakar GI, Satoh R, Takasaki T, Fujitani K, Tanabe G, Sakai K, Nishio K, Sugiura R. ACAGT-007a, an ERK MAPK Signaling Modulator, in Combination with AKT Signaling Inhibition Induces Apoptosis in KRAS Mutant Pancreatic Cancer T3M4 and MIA-Pa-Ca-2 Cells. Cells 2022; 11:702. [PMID: 35203351 PMCID: PMC8869916 DOI: 10.3390/cells11040702] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/02/2022] [Accepted: 02/03/2022] [Indexed: 01/27/2023] Open
Abstract
The mitogen-activated protein kinase (MAPK)/ERK and phosphatidylinositol-3 kinase (PI3K)/AKT pathways are dysregulated in various human cancers, including pancreatic ductal adenocarcinoma (PDAC), which has a very poor prognosis due to its lack of efficient therapies. We have previously identified ACAGT-007a (GT-7), an anti-cancer compound that kills ERK-active melanoma cells by inducing ERK-dependent apoptosis. Here, we investigated the apoptosis-inducing effect of GT-7 on three PDAC cell lines and its relevance with the MAPK/ERK and PI3K/AKT signaling pathways. GT-7 induced apoptosis in PDAC cells with different KRAS mutations (MIA-Pa-Ca-2 (KRAS G12C), T3M4 (KRAS Q61H), and PANC-1 (KRAS G12D)), being T3M4 most susceptible, followed by MIA-Pa-Ca-2, and PANC-1 was most resistant to apoptosis induction by GT-7. GT-7 stimulated ERK phosphorylation in the three PDAC cells, but only T3M4 displayed ERK-activation-dependent apoptosis. Furthermore, GT-7 induced a marked down-regulation of AKT phosphorylation after a transient peak in T3M4, whereas PANC-1 displayed the strongest and most sustained AKT activation, followed by MIA-Pa-Ca-2, suggesting that sustained AKT phosphorylation as a determinant for the resistance to GT-7-mediated apoptosis. Consistently, a PI3K inhibitor, Wortmannin, abolished AKT phosphorylation and enhanced GT-7-mediated apoptosis in T3M4 and MIA-Pa-Ca-2, but not in PANC-1, which showed residual AKT phosphorylation. This is the first report that ERK stimulation alone or in combination with AKT signaling inhibition can effectively induce apoptosis in PDAC and provides a rationale for a novel concurrent targeting of the PI3K/AKT and ERK pathways.
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Affiliation(s)
- Golam Iftakhar Khandakar
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan; (G.I.K.); (R.S.); (T.T.); (K.F.)
| | - Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan; (G.I.K.); (R.S.); (T.T.); (K.F.)
| | - Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan; (G.I.K.); (R.S.); (T.T.); (K.F.)
| | - Kana Fujitani
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan; (G.I.K.); (R.S.); (T.T.); (K.F.)
| | - Genzoh Tanabe
- Laboratory of Organic Chemistry, Department of Pharmacy, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan;
| | - Kazuko Sakai
- Department of Genome Biology, Kindai University School of Medicine, Osaka 589-8511, Japan; (K.S.); (K.N.)
| | - Kazuto Nishio
- Department of Genome Biology, Kindai University School of Medicine, Osaka 589-8511, Japan; (K.S.); (K.N.)
| | - Reiko Sugiura
- Laboratory of Organic Chemistry, Department of Pharmacy, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan;
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Takasaki T, Tomimoto N, Ikehata T, Satoh R, Sugiura R. Distinct spatiotemporal distribution of Hsp90 under high-heat and mild-heat stress conditions in fission yeast. MicroPubl Biol 2021; 2021:10.17912/micropub.biology.000388. [PMID: 34036246 PMCID: PMC8140757 DOI: 10.17912/micropub.biology.000388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The molecular chaperone Hsp90 is highly conserved from bacteria to mammals. In fission yeast, Hsp90 is essential in many cellular processes and its expression is known to be increased by heat stress (HS). Here, we describe the distinct spatiotemporal distribution of Hsp90 under high-heat stress (HHS: 45˚C) and mild-heat stress (MHS: 37˚C). Hsp90 is largely distributed in the cytoplasm under non-stressed conditions (27˚C). Under HHS, Hsp90 forms several cytoplasmic granules within 5 minutes, then the granules disappear within 60 minutes. Under MHS, Hsp90 forms fewer granules than under HHS within 5 minutes and strikingly the granules persist and grow in size. In addition, nuclear enrichment of Hsp90 was observed after 60 minutes under both HS conditions. Our data suggest that assembly/disassembly of Hsp90 granules is differentially regulated by temperatures.
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Affiliation(s)
- Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University
| | - Naofumi Tomimoto
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University
| | - Takumi Ikehata
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University
| | - Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University,
Correspondence to: Reiko Sugiura ()
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Kanda Y, Satoh R, Takasaki T, Tomimoto N, Tsuchiya K, Tsai CA, Tanaka T, Kyomoto S, Hamada K, Fujiwara T, Sugiura R. Sequestration of the PKC ortholog Pck2 in stress granules as a feedback mechanism of MAPK signaling in fission yeast. J Cell Sci 2021; 134:224095. [PMID: 33277379 DOI: 10.1242/jcs.250191] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 11/23/2020] [Indexed: 12/22/2022] Open
Abstract
Protein kinase C (PKC) signaling is a highly conserved signaling module that plays a central role in a myriad of physiological processes, ranging from cell proliferation to cell death, via various signaling pathways, including MAPK signaling. Stress granules (SGs) are non-membranous cytoplasmic foci that aggregate in cells exposed to environmental stresses. Here, we explored the role of SGs in PKC/MAPK signaling activation in fission yeast. High-heat stress (HHS) induced Pmk1 MAPK activation and Pck2 translocation from the cell tips into poly(A)-binding protein (Pabp)-positive SGs. Pck2 dispersal from the cell tips required Pck2 kinase activity, and constitutively active Pck2 exhibited increased translocation to SGs. Importantly, Pmk1 deletion impaired Pck2 recruitment to SGs, indicating that MAPK activation stimulates Pck2 SG translocation. Consistently, HHS-induced SGs delayed Pck2 relocalization at the cell tips, thereby blocking subsequent Pmk1 reactivation after recovery from HHS. HHS partitioned Pck2 into the Pabp-positive SG-containing fraction, which resulted in reduced Pck2 abundance and kinase activity in the soluble fraction. Taken together, these results indicate that MAPK-dependent Pck2 SG recruitment serves as a feedback mechanism to intercept PKC/MAPK activation induced by HHS, which might underlie PKC-related diseases.
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Affiliation(s)
- Yuki Kanda
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Naofumi Tomimoto
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Kiko Tsuchiya
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Chun An Tsai
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Taemi Tanaka
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Shu Kyomoto
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Kozo Hamada
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Toshinobu Fujiwara
- Laboratory of Biochemistry, Department of Pharmacy, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka 577-8502, Japan
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10
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Kanda Y, Mizuno A, Takasaki T, Satoh R, Hagihara K, Masuko T, Endo Y, Tanabe G, Sugiura R. Down-regulation of dual-specificity phosphatase 6, a negative regulator of oncogenic ERK signaling, by ACA-28 induces apoptosis in NIH/3T3 cells overexpressing HER2/ErbB2. Genes Cells 2020; 26:109-116. [PMID: 33249692 DOI: 10.1111/gtc.12823] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/20/2020] [Accepted: 11/21/2020] [Indexed: 12/15/2022]
Abstract
Dual-specificity phosphatase 6 (DUSP6) is a key negative feedback regulator of the member of the RAS-ERK MAPK signaling pathway that is associated with cellular proliferation and differentiation. Deterioration of DUSP6 expression could therefore result in deregulated growth activity. We have previously discovered ACA-28, a novel anticancer compound with a unique property to stimulate ERK phosphorylation and induce apoptosis in ERK-active melanoma cells. However, the mechanism of cancer cell-specific-apoptosis by ACA-28 remains obscure. Here, we investigated the involvement of DUSP6 in the mechanisms of the ACA-28-mediated apoptosis by using the NIH/3T3 cells overexpressing HER2/ErbB2 (A4-15 cells), as A4-15 exhibited higher ERK phosphorylation and are more susceptible to ACA-28 than NIH/3T3. We showed that A4-15 exhibited high DUSP6 protein levels, which require ERK activation. Notably, the silencing of the DUDSP6 gene by siRNA inhibited proliferation and induced apoptosis in A4-15, but not in NIH/3T3, indicating that A4-15 requires high DUSP6 expression for growth. Importantly, ACA-28 preferentially down-regulated the DUSP6 protein and proliferation in A4-15 via the proteasome, while it stimulated ERK phosphorylation. Collectively, the up-regulation of DUSP6 may exert a growth-promoting role in cancer cells overexpressing HER2. DUSP6 down-regulation in ERK-active cancer cells might have the potential as a novel cancer measure.
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Affiliation(s)
- Yuki Kanda
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Ayami Mizuno
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Kanako Hagihara
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Takashi Masuko
- Laboratory of Natural Drug Resources, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Yuichi Endo
- Laboratory of Natural Drug Resources, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan
| | - Genzoh Tanabe
- Laboratory of Organic Chemistry, Department of Pharmacy, Kindai University, Higashi-Osaka, Japan
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Kindai University, Higashi-Osaka, Japan.,Pharmaceutical Research and Technology Institute, Kindai University, Higashi-Osaka, Japan
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11
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Hagihara K, Kanda Y, Ishida K, Satoh R, Takasaki T, Maeda T, Sugiura R. Chemical genetic analysis of FTY720- and Ca 2+ -sensitive mutants reveals a functional connection between FTY720 and membrane trafficking. Genes Cells 2020; 25:637-645. [PMID: 32682352 DOI: 10.1111/gtc.12800] [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: 05/06/2020] [Revised: 06/25/2020] [Accepted: 07/05/2020] [Indexed: 11/27/2022]
Abstract
FTY720, a sphingosine-1-phosphate (S1P) analog, is used as an immune modulator to treat multiple sclerosis. Accumulating evidence has suggested the mode of action of FTY720 independent of an S1P modulator. In fission yeast, FTY720 induces an increase in intracellular Ca2+ and ROS levels. We have previously identified 49 genes of which deletion causes FTY720 sensitivity. Here, we characterized the FTY720-sensitive mutants in terms of their relevance to the Ca2+ homeostasis and identified the 16 FTY720- and Ca2+ -sensitive mutants (fcs mutants). Most of the FTY720-sensitive mutants showed elevated Ca2+ levels and exhibited Ca2+ dysregulation by FTY720 treatment. One of the functional categories among the genes whose deletion renders cells susceptible to FTY720 and Ca2+ include the Golgi/endosomal membrane trafficking. Notably, FTY720, but not phosphorylated FTY720 incapable of inducing Ca2+ increase, inhibited the secretion of acid phosphatase in the wild-type cells. Importantly, secretory defects of the Golgi/endosomal trafficking mutants, Vps45, or Ryh1 deletion, were further exacerbated by FTY720. Our fcs mutant screen also identified the adenylyl cyclase-associated protein Cap1 and a Rictor homolog Ste20, whose deletion markedly exacerbated FTY720-sensitive secretory impairment. Collectively, our data may suggest a synergistic impact of FTY720 combined with secretion perturbation on proliferation and Ca2+ homeostasis.
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Affiliation(s)
- Kanako Hagihara
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka City, Japan.,Laboratory of Hygienic Science, Department of Pharmacy, School of Pharmacy, Hyogo University of Health Sciences, Kobe, Japan
| | - Yuki Kanda
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka City, Japan
| | - Kouki Ishida
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka City, Japan
| | - Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka City, Japan
| | - Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka City, Japan
| | - Takuya Maeda
- Laboratory of Hygienic Science, Department of Pharmacy, School of Pharmacy, Hyogo University of Health Sciences, Kobe, Japan
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashi-Osaka City, Japan
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12
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Satoh R, Hara N, Kawasaki A, Takasaki T, Sugiura R. Distinct modes of stress granule assembly mediated by the KH-type RNA-binding protein Rnc1. Genes Cells 2018; 23:778-785. [PMID: 30014536 DOI: 10.1111/gtc.12624] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/11/2018] [Accepted: 06/17/2018] [Indexed: 12/01/2022]
Abstract
We have previously identified the KH-type RNA-binding protein Rnc1 as an important regulator of the posttranscriptional expression of the MAPK phosphatase Pmp1 in fission yeast. Rnc1 localization in response to stress has not been elucidated thus far. Here, we report the dual roles of Rnc1 in assembly of stress granules (SGs), nonmembranous cytoplasmic foci composed of messenger ribonucleoproteins. Rnc1 can localize to poly(A)-binding protein (Pabp)-positive SGs upon various stress stimuli, including heat shock (HS) and arsenite treatment. Furthermore, Rnc1 deletion results in decreased SGs, indicating that Rnc1 is a new component and a regulator of SGs. Notably, Rnc1 translocates to the dot-like structures faster than Pabp, and this stress-induced Rnc1 translocation does not require its RNA-binding ability, as the Rnc1KH1,2,3GD mutant protein with impaired RNA-binding activity forms dots rather more efficiently than the wild-type Rnc1 upon HS. Interestingly, in the absence of stress, Rnc1 overproduction induced massive aggregation of Pabp-positive SGs and eIF2α phosphorylation. In clear contrast, overproduction of the Rnc1KH1,2,3GD mutant failed to induce Pabp aggregation and eIF2α phosphorylation, indicating that Rnc1 overproduction-induced SG assembly requires Rnc1 RNA-binding activity. Collectively, Rnc1 regulates SG assembly, dependently or independently of its RNA-binding activity.
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Affiliation(s)
- Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Nobuki Hara
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Aki Kawasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Osaka, Japan
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13
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Hagihara K, Kinoshita K, Ishida K, Hojo S, Kameoka Y, Satoh R, Takasaki T, Sugiura R. A genome-wide screen for FTY720-sensitive mutants reveals genes required for ROS homeostasis. Microb Cell 2017; 4:390-401. [PMID: 29234668 PMCID: PMC5722642 DOI: 10.15698/mic2017.12.601] [Citation(s) in RCA: 7] [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] [Indexed: 01/10/2023]
Abstract
Fingolimod hydrochloride (FTY720), a sphingosine-1-phosphate (S1P) analogue, is an approved immune modulator for the treatment of multiple sclerosis (MS). Notably, in addition to its well-known mode of action as an S1P modulator, accumulating evidence suggests that FTY720 induces apoptosis in various cancer cells via reactive oxygen species (ROS) generation. Although the involvement of multiple signaling molecules, such as JNK (Jun N-terminal kinase), Akt (alpha serine/threonine-protein kinase) and Sphk has been reported, the exact mechanisms how FTY720 induces cell growth inhibition and the functional relationship between FTY720 and these signaling pathways remain elusive. Our previous reports using the fission yeast Schizosaccharomyces pombe as a model system to elucidate FTY720-mediated signaling pathways revealed that FTY720 induces an increase in intracellular Ca2+ concentrations and ROS generation, which resulted in the activation of the transcriptional responses downstream of Ca2+/calcineurin signaling and stress-activated MAPK signaling, respectively. Here, we performed a genome-wide screening for genes whose deletion induces FTY720-sensitive growth in S. pombe and identified 49 genes. These gene products are related to the biological processes involved in metabolic processes, transport, transcription, translation, chromatin organization, cytoskeleton organization and intracellular signal transduction. Notably, most of the FTY720-sensitive deletion cells exhibited NAC-remedial FTY720 sensitivities and dysregulated ROS homeostasis. Our results revealed a novel gene network involving ROS homeostasis and the possible mechanisms of the FTY720 toxicity.
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Affiliation(s)
- Kanako Hagihara
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka City, Osaka 577-8502, Japan
| | - Kanako Kinoshita
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka City, Osaka 577-8502, Japan
| | - Kouki Ishida
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka City, Osaka 577-8502, Japan
| | - Shihomi Hojo
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka City, Osaka 577-8502, Japan
| | - Yoshinori Kameoka
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka City, Osaka 577-8502, Japan
| | - Ryosuke Satoh
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka City, Osaka 577-8502, Japan
| | - Teruaki Takasaki
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka City, Osaka 577-8502, Japan
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, 3-4-1 Kowakae, Higashi-Osaka City, Osaka 577-8502, Japan
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14
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Miwa T, Takasaki T, Inoue K, Sakamoto H. Restricted distribution of mrg-1 mRNA in C. elegans primordial germ cells through germ granule-independent regulation. Genes Cells 2015; 20:932-42. [PMID: 26537333 DOI: 10.1111/gtc.12285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Accepted: 08/02/2015] [Indexed: 11/27/2022]
Abstract
The chromodomain protein MRG-1 is an essential maternal factor for proper germline development that protects germ cells from cell death in C. elegans. Unlike germ granules, which are exclusively segregated to the germline blastomeres at each cell division from the first cleavage of the embryo, MRG-1 is abundant in all cells in early embryos and is then gradually restricted to the primordial germ cells (PGCs) by the morphogenesis stage. Here, we show that this characteristic spatiotemporal expression pattern is dictated by the mrg-1 3'UTR and is differentially regulated at the RNA level between germline and somatic cells. Asymmetric segregation of germ granules is not necessary to localize MRG-1 to the PGCs. We found that MES-4, an essential chromatin regulator in germ cells, also accumulates in the PGCs in a germ granule-independent manner. We propose that C.elegans PGCs have a novel mechanism to accumulate at least some chromatin-associated proteins that are essential for germline immortality.
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Affiliation(s)
- Takashi Miwa
- Department of Biology, Graduate School of Science, Kobe University, Kobe, Japan
| | - Teruaki Takasaki
- Department of Biology, Graduate School of Science, Kobe University, Kobe, Japan
| | - Kunio Inoue
- Department of Biology, Graduate School of Science, Kobe University, Kobe, Japan
| | - Hiroshi Sakamoto
- Department of Biology, Graduate School of Science, Kobe University, Kobe, Japan
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15
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Kutsuna S, Kato Y, Takasaki T, Moi ML, Kotaki A, Uemura H, Matono T, Fujiya Y, Mawatari M, Takeshita N, Hayakawa K, Kanagawa S, Ohmagari N. Two cases of Zika fever imported from French Polynesia to Japan, December 2013 to January 2014. Euro Surveill 2014; 19. [DOI: 10.2807/1560-7917.es2014.19.4.20683] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We present two cases of imported Zika fever to Japan, in travellers returning from French Polynesia, where an outbreak due to Zika virus (ZIKV) is ongoing since week 41 of 2013. This report serves to raise awareness among healthcare professionals, that the differential diagnosis of febrile and subfebrile patients with rash should include ZIKV infection, especially in patients returning from areas affected by this virus.
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Affiliation(s)
- S Kutsuna
- National Center for Global health and Medicine, Disease Control and Prevention Center, Tokyo, Japan
| | - Y Kato
- National Center for Global health and Medicine, Disease Control and Prevention Center, Tokyo, Japan
| | - T Takasaki
- Department of Virology 1, National Institute of Infectious Diseases, Shinjukuku, Tokyo, Japan
| | - M L Moi
- Department of Virology 1, National Institute of Infectious Diseases, Shinjukuku, Tokyo, Japan
| | - A Kotaki
- Department of Virology 1, National Institute of Infectious Diseases, Shinjukuku, Tokyo, Japan
| | - H Uemura
- National Center for Global health and Medicine, Disease Control and Prevention Center, Tokyo, Japan
| | - T Matono
- National Center for Global health and Medicine, Disease Control and Prevention Center, Tokyo, Japan
| | - Y Fujiya
- National Center for Global health and Medicine, Disease Control and Prevention Center, Tokyo, Japan
| | - M Mawatari
- National Center for Global health and Medicine, Disease Control and Prevention Center, Tokyo, Japan
| | - N Takeshita
- National Center for Global health and Medicine, Disease Control and Prevention Center, Tokyo, Japan
| | - K Hayakawa
- National Center for Global health and Medicine, Disease Control and Prevention Center, Tokyo, Japan
| | - S Kanagawa
- National Center for Global health and Medicine, Disease Control and Prevention Center, Tokyo, Japan
| | - N Ohmagari
- National Center for Global health and Medicine, Disease Control and Prevention Center, Tokyo, Japan
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16
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Uchida N, Katayama A, Katayama K, Takahashi S, Takasaki T, Sueda T. 117 * LONG-TERM RESULTS OF THE FROZEN ELEPHANT TRUNK TECHNIQUE FOR ACUTE TYPE A AORTIC DISSECTION FROM A 15-YEAR EXPERIENCE. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt372.117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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17
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Moi ML, Takasaki T, Saijo M, Kurane I. Dengue virus infection-enhancing activity of undiluted sera obtained from patients with secondary dengue virus infection. Trans R Soc Trop Med Hyg 2012; 107:51-8. [DOI: 10.1093/trstmh/trs007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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18
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Wong KT, Ng KY, Ong KC, Ng WF, Shankar SK, Mahadevan A, Radotra B, Su IJ, Lau G, Ling AE, Chan KP, Macorelles P, Vallet S, Cardosa MJ, Desai A, Ravi V, Nagata N, Shimizu H, Takasaki T. Enterovirus 71 encephalomyelitis and Japanese encephalitis can be distinguished by topographic distribution of inflammation and specific intraneuronal detection of viral antigen and RNA. Neuropathol Appl Neurobiol 2012; 38:443-53. [PMID: 22236252 DOI: 10.1111/j.1365-2990.2011.01247.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS To investigate if two important epidemic viral encephalitis in children, Enterovirus 71 (EV71) encephalomyelitis and Japanese encephalitis (JE) whose clinical and pathological features may be nonspecific and overlapping, could be distinguished. METHODS Tissue sections from the central nervous system of infected cases were examined by light microscopy, immunohistochemistry and in situ hybridization. RESULTS All 13 cases of EV71 encephalomyelitis collected from Asia and France invariably showed stereotyped distribution of inflammation in the spinal cord, brainstem, hypothalamus, cerebellar dentate nucleus and, to a lesser extent, cerebral cortex and meninges. Anterior pons, corpus striatum, thalamus, temporal lobe, hippocampus and cerebellar cortex were always uninflamed. In contrast, the eight JE cases studied showed inflammation involving most neuronal areas of the central nervous system, including the areas that were uninflamed in EV71 encephalomyelitis. Lesions in both infections were nonspecific, consisting of perivascular and parenchymal infiltration by inflammatory cells, oedematous/necrolytic areas, microglial nodules and neuronophagia. Viral inclusions were absent. CONCLUSIONS Immunohistochemistry and in situ hybridization assays were useful to identify the causative virus, localizing viral antigens and RNA, respectively, almost exclusively to neurones. The stereotyped distribution of inflammatory lesions in EV71 encephalomyelitis appears to be very useful to help distinguish it from JE.
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Affiliation(s)
- K T Wong
- Faculty of Medicine, University of Malaya, Kuala Lumpur, Kuching, Malaysia.
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Yao J, Nishimura K, Mukai T, Takasaki T, Tsutsumi K, Aguey-Zinsou KF, Sakai T. LiMn0.97Al0.03O2 Based Carbon Fiber Electrode Possessing High Rate Capabilities for Li-Ion Batteries. ACTA ACUST UNITED AC 2012. [DOI: 10.1149/2.009206eel] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Gerstein MB, Lu ZJ, Van Nostrand EL, Cheng C, Arshinoff BI, Liu T, Yip KY, Robilotto R, Rechtsteiner A, Ikegami K, Alves P, Chateigner A, Perry M, Morris M, Auerbach RK, Feng X, Leng J, Vielle A, Niu W, Rhrissorrakrai K, Agarwal A, Alexander RP, Barber G, Brdlik CM, Brennan J, Brouillet JJ, Carr A, Cheung MS, Clawson H, Contrino S, Dannenberg LO, Dernburg AF, Desai A, Dick L, Dosé AC, Du J, Egelhofer T, Ercan S, Euskirchen G, Ewing B, Feingold EA, Gassmann R, Good PJ, Green P, Gullier F, Gutwein M, Guyer MS, Habegger L, Han T, Henikoff JG, Henz SR, Hinrichs A, Holster H, Hyman T, Iniguez AL, Janette J, Jensen M, Kato M, Kent WJ, Kephart E, Khivansara V, Khurana E, Kim JK, Kolasinska-Zwierz P, Lai EC, Latorre I, Leahey A, Lewis S, Lloyd P, Lochovsky L, Lowdon RF, Lubling Y, Lyne R, MacCoss M, Mackowiak SD, Mangone M, McKay S, Mecenas D, Merrihew G, Miller DM, Muroyama A, Murray JI, Ooi SL, Pham H, Phippen T, Preston EA, Rajewsky N, Rätsch G, Rosenbaum H, Rozowsky J, Rutherford K, Ruzanov P, Sarov M, Sasidharan R, Sboner A, Scheid P, Segal E, Shin H, Shou C, Slack FJ, Slightam C, Smith R, Spencer WC, Stinson EO, Taing S, Takasaki T, Vafeados D, Voronina K, Wang G, Washington NL, Whittle CM, Wu B, Yan KK, Zeller G, Zha Z, Zhong M, Zhou X, Ahringer J, Strome S, Gunsalus KC, Micklem G, Liu XS, Reinke V, Kim SK, Hillier LW, Henikoff S, Piano F, Snyder M, Stein L, Lieb JD, Waterston RH. Integrative analysis of the Caenorhabditis elegans genome by the modENCODE project. Science 2010; 330:1775-87. [PMID: 21177976 PMCID: PMC3142569 DOI: 10.1126/science.1196914] [Citation(s) in RCA: 741] [Impact Index Per Article: 52.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We systematically generated large-scale data sets to improve genome annotation for the nematode Caenorhabditis elegans, a key model organism. These data sets include transcriptome profiling across a developmental time course, genome-wide identification of transcription factor-binding sites, and maps of chromatin organization. From this, we created more complete and accurate gene models, including alternative splice forms and candidate noncoding RNAs. We constructed hierarchical networks of transcription factor-binding and microRNA interactions and discovered chromosomal locations bound by an unusually large number of transcription factors. Different patterns of chromatin composition and histone modification were revealed between chromosome arms and centers, with similarly prominent differences between autosomes and the X chromosome. Integrating data types, we built statistical models relating chromatin, transcription factor binding, and gene expression. Overall, our analyses ascribed putative functions to most of the conserved genome.
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Affiliation(s)
- Mark B. Gerstein
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Computer Science, Yale University, 51 Prospect Street, New Haven, CT 06511, USA
| | - Zhi John Lu
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Eric L. Van Nostrand
- Department of Genetics, Stanford University Medical Center, Stanford, CA 94305, USA
| | - Chao Cheng
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Bradley I. Arshinoff
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
- Department of Molecular Genetics, University of Toronto, 27 King's College Circle, Toronto, Ontario M5S 1A1, Canada
| | - Tao Liu
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA
- Department of Biostatistics, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA
| | - Kevin Y. Yip
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Rebecca Robilotto
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Andreas Rechtsteiner
- Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Kohta Ikegami
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Pedro Alves
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Aurelien Chateigner
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Marc Perry
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
| | - Mitzi Morris
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Raymond K. Auerbach
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Xin Feng
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
- Department of Biomedical Engineering, State University of New York at Stonybrook, Stonybrook, NY 11794, USA
| | - Jing Leng
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Anne Vielle
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Wei Niu
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06824, USA
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520–8005, USA
| | - Kahn Rhrissorrakrai
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Ashish Agarwal
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Computer Science, Yale University, 51 Prospect Street, New Haven, CT 06511, USA
| | - Roger P. Alexander
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Galt Barber
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA 95064 USA
| | - Cathleen M. Brdlik
- Department of Genetics, Stanford University Medical Center, Stanford, CA 94305, USA
| | - Jennifer Brennan
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | | | - Adrian Carr
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Ming-Sin Cheung
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Hiram Clawson
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA 95064 USA
| | - Sergio Contrino
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | | | - Abby F. Dernburg
- Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA, and Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Arshad Desai
- Ludwig Institute Cancer Research/Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0653, USA
| | - Lindsay Dick
- David Rockefeller Graduate Program, Rockefeller University, 1230 York Avenue New York, NY 10065, USA
| | - Andréa C. Dosé
- Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA, and Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Jiang Du
- Department of Computer Science, Yale University, 51 Prospect Street, New Haven, CT 06511, USA
| | - Thea Egelhofer
- Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Sevinc Ercan
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Ghia Euskirchen
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06824, USA
| | - Brent Ewing
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Elise A. Feingold
- Division of Extramural Research, National Human Genome Research Institute, National Institutes of Health, 5635 Fishers Lane, Suite 4076, Bethesda, MD 20892–9305, USA
| | - Reto Gassmann
- Ludwig Institute Cancer Research/Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0653, USA
| | - Peter J. Good
- Division of Extramural Research, National Human Genome Research Institute, National Institutes of Health, 5635 Fishers Lane, Suite 4076, Bethesda, MD 20892–9305, USA
| | - Phil Green
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Francois Gullier
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Michelle Gutwein
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Mark S. Guyer
- Division of Extramural Research, National Human Genome Research Institute, National Institutes of Health, 5635 Fishers Lane, Suite 4076, Bethesda, MD 20892–9305, USA
| | - Lukas Habegger
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Ting Han
- Life Sciences Institute, Department of Human Genetics, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109–2216, USA
| | - Jorja G. Henikoff
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Stefan R. Henz
- Max Planck Institute for Developmental Biology, Spemannstrasse 37-39, 72076 Tübingen, Germany
| | - Angie Hinrichs
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA 95064 USA
| | - Heather Holster
- Roche NimbleGen, 500 South Rosa Road, Madison, WI 53719, USA
| | - Tony Hyman
- Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany
| | - A. Leo Iniguez
- Roche NimbleGen, 500 South Rosa Road, Madison, WI 53719, USA
| | - Judith Janette
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520–8005, USA
| | - Morten Jensen
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Masaomi Kato
- Department of Molecular, Cellular and Developmental Biology, Post Office Box 208103, Yale University, New Haven, CT 06520, USA
| | - W. James Kent
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA 95064 USA
| | - Ellen Kephart
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
| | - Vishal Khivansara
- Life Sciences Institute, Department of Human Genetics, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109–2216, USA
| | - Ekta Khurana
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - John K. Kim
- Life Sciences Institute, Department of Human Genetics, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109–2216, USA
| | - Paulina Kolasinska-Zwierz
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Eric C. Lai
- Sloan-Kettering Institute, 1275 York Avenue, Post Office Box 252, New York, NY 10065, USA
| | - Isabel Latorre
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Amber Leahey
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Suzanna Lewis
- Genomics Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mailstop 64-121, Berkeley, CA 94720 USA
| | - Paul Lloyd
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
| | - Lucas Lochovsky
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Rebecca F. Lowdon
- Division of Extramural Research, National Human Genome Research Institute, National Institutes of Health, 5635 Fishers Lane, Suite 4076, Bethesda, MD 20892–9305, USA
| | - Yaniv Lubling
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Rachel Lyne
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Michael MacCoss
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Sebastian D. Mackowiak
- Max-Delbrück-Centrum für Molekulare Medizin, Division of Systems Biology, Robert-Rössle-Strasse 10, D-13125 Berlin-Buch, Germany
| | - Marco Mangone
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Sheldon McKay
- Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11542 USA
| | - Desirea Mecenas
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Gennifer Merrihew
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - David M. Miller
- Department of Cell and Developmental Biology, Vanderbilt University, 465 21st Avenue South, Nashville, TN 37232–8240, USA
| | - Andrew Muroyama
- Ludwig Institute Cancer Research/Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0653, USA
| | - John I. Murray
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Siew-Loon Ooi
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Hoang Pham
- Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA, and Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Taryn Phippen
- Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Elicia A. Preston
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Nikolaus Rajewsky
- Max-Delbrück-Centrum für Molekulare Medizin, Division of Systems Biology, Robert-Rössle-Strasse 10, D-13125 Berlin-Buch, Germany
| | - Gunnar Rätsch
- Friedrich Miescher Laboratory of the Max Planck Society, Spemannstrasse 39, 72076 Tübingen, Germany
| | - Heidi Rosenbaum
- Roche NimbleGen, 500 South Rosa Road, Madison, WI 53719, USA
| | - Joel Rozowsky
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Kim Rutherford
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Peter Ruzanov
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
| | - Mihail Sarov
- Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany
| | - Rajkumar Sasidharan
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Andrea Sboner
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Paul Scheid
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Eran Segal
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Hyunjin Shin
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA
- Department of Biostatistics, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA
| | - Chong Shou
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Frank J. Slack
- Department of Molecular, Cellular and Developmental Biology, Post Office Box 208103, Yale University, New Haven, CT 06520, USA
| | - Cindie Slightam
- Department of Developmental Biology, Stanford University Medical Center, 279 Campus Drive, Stanford, CA 94305–5329, USA
| | - Richard Smith
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - William C. Spencer
- Department of Cell and Developmental Biology, Vanderbilt University, 465 21st Avenue South, Nashville, TN 37232–8240, USA
| | - E. O. Stinson
- Genomics Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mailstop 64-121, Berkeley, CA 94720 USA
| | - Scott Taing
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA
| | - Teruaki Takasaki
- Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Dionne Vafeados
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Ksenia Voronina
- Ludwig Institute Cancer Research/Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0653, USA
| | - Guilin Wang
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520–8005, USA
| | - Nicole L. Washington
- Genomics Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mailstop 64-121, Berkeley, CA 94720 USA
| | - Christina M. Whittle
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Beijing Wu
- Department of Developmental Biology, Stanford University Medical Center, 279 Campus Drive, Stanford, CA 94305–5329, USA
| | - Koon-Kiu Yan
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Georg Zeller
- Friedrich Miescher Laboratory of the Max Planck Society, Spemannstrasse 39, 72076 Tübingen, Germany
- European Molecular Biology Laboratory, 69117 Heidelberg, Germany
| | - Zheng Zha
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
| | - Mei Zhong
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06824, USA
| | - Xingliang Zhou
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | | | - Julie Ahringer
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Susan Strome
- Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Kristin C. Gunsalus
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
- New York University, Abu Dhabi, United Arab Emirates
| | - Gos Micklem
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - X. Shirley Liu
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA
- Department of Biostatistics, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA
| | - Valerie Reinke
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520–8005, USA
| | - Stuart K. Kim
- Department of Genetics, Stanford University Medical Center, Stanford, CA 94305, USA
- Department of Developmental Biology, Stanford University Medical Center, 279 Campus Drive, Stanford, CA 94305–5329, USA
| | - LaDeana W. Hillier
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Steven Henikoff
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Fabio Piano
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
- New York University, Abu Dhabi, United Arab Emirates
| | - Michael Snyder
- Department of Genetics, Stanford University Medical Center, Stanford, CA 94305, USA
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06824, USA
| | - Lincoln Stein
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
- Department of Molecular Genetics, University of Toronto, 27 King's College Circle, Toronto, Ontario M5S 1A1, Canada
- Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11542 USA
| | - Jason D. Lieb
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Robert H. Waterston
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
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Liu T, Rechtsteiner A, Egelhofer TA, Vielle A, Latorre I, Cheung MS, Ercan S, Ikegami K, Jensen M, Kolasinska-Zwierz P, Rosenbaum H, Shin H, Taing S, Takasaki T, Iniguez AL, Desai A, Dernburg AF, Kimura H, Lieb JD, Ahringer J, Strome S, Liu XS. Broad chromosomal domains of histone modification patterns in C. elegans. Genome Res 2010; 21:227-36. [PMID: 21177964 DOI: 10.1101/gr.115519.110] [Citation(s) in RCA: 231] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Chromatin immunoprecipitation identifies specific interactions between genomic DNA and proteins, advancing our understanding of gene-level and chromosome-level regulation. Based on chromatin immunoprecipitation experiments using validated antibodies, we define the genome-wide distributions of 19 histone modifications, one histone variant, and eight chromatin-associated proteins in Caenorhabditis elegans embryos and L3 larvae. Cluster analysis identified five groups of chromatin marks with shared features: Two groups correlate with gene repression, two with gene activation, and one with the X chromosome. The X chromosome displays numerous unique properties, including enrichment of monomethylated H4K20 and H3K27, which correlate with the different repressive mechanisms that operate in somatic tissues and germ cells, respectively. The data also revealed striking differences in chromatin composition between the autosomes and between chromosome arms and centers. Chromosomes I and III are globally enriched for marks of active genes, consistent with containing more highly expressed genes, compared to chromosomes II, IV, and especially V. Consistent with the absence of cytological heterochromatin and the holocentric nature of C. elegans chromosomes, markers of heterochromatin such as H3K9 methylation are not concentrated at a single region on each chromosome. Instead, H3K9 methylation is enriched on chromosome arms, coincident with zones of elevated meiotic recombination. Active genes in chromosome arms and centers have very similar histone mark distributions, suggesting that active domains in the arms are interspersed with heterochromatin-like structure. These data, which confirm and extend previous studies, allow for in-depth analysis of the organization and deployment of the C. elegans genome during development.
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Affiliation(s)
- Tao Liu
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute and Harvard School of Public Health, Boston, Massachusetts 02115, USA
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22
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Affiliation(s)
- M L Moi
- Department of Virology, National Institute of Infectious Diseases, Tokyo, Japan
| | - M Ujiie
- Disease Control and Prevention Center, National Center for Global Health and Medicine, Shinjuku, Tokyo, Japan
| | - T Takasaki
- Department of Virology, National Institute of Infectious Diseases, Tokyo, Japan
| | - I Kurane
- Department of Virology, National Institute of Infectious Diseases, Tokyo, Japan
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23
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Moi ML, Ujiie M, Takasaki T, Kurane I. Dengue virus infection in travellers returning from Benin to France, July - August, 2010. Euro Surveill 2010; 15:19674. [PMID: 20929654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
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Rechtsteiner A, Ercan S, Takasaki T, Phippen TM, Egelhofer TA, Wang W, Kimura H, Lieb JD, Strome S. The histone H3K36 methyltransferase MES-4 acts epigenetically to transmit the memory of germline gene expression to progeny. PLoS Genet 2010; 6:e1001091. [PMID: 20824077 PMCID: PMC2932692 DOI: 10.1371/journal.pgen.1001091] [Citation(s) in RCA: 138] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Accepted: 07/26/2010] [Indexed: 11/25/2022] Open
Abstract
Methylation of histone H3K36 in higher eukaryotes is mediated by multiple methyltransferases. Set2-related H3K36 methyltransferases are targeted to genes by association with RNA Polymerase II and are involved in preventing aberrant transcription initiation within the body of genes. The targeting and roles of the NSD family of mammalian H3K36 methyltransferases, known to be involved in human developmental disorders and oncogenesis, are not known. We used genome-wide chromatin immunoprecipitation (ChIP) to investigate the targeting and roles of the Caenorhabditis elegans NSD homolog MES-4, which is maternally provided to progeny and is required for the survival of nascent germ cells. ChIP analysis in early C. elegans embryos revealed that, consistent with immunostaining results, MES-4 binding sites are concentrated on the autosomes and the leftmost ∼2% (300 kb) of the X chromosome. MES-4 overlies the coding regions of approximately 5,000 genes, with a modest elevation in the 5′ regions of gene bodies. Although MES-4 is generally found over Pol II-bound genes, analysis of gene sets with different temporal-spatial patterns of expression revealed that Pol II association with genes is neither necessary nor sufficient to recruit MES-4. In early embryos, MES-4 associates with genes that were previously expressed in the maternal germ line, an interaction that does not require continued association of Pol II with those loci. Conversely, Pol II association with genes newly expressed in embryos does not lead to recruitment of MES-4 to those genes. These and other findings suggest that MES-4, and perhaps the related mammalian NSD proteins, provide an epigenetic function for H3K36 methylation that is novel and likely to be unrelated to ongoing transcription. We propose that MES-4 transmits the memory of gene expression in the parental germ line to offspring and that this memory role is critical for the PGCs to execute a proper germline program. Germ cells transmit the genome from one generation to the next. The identity and immortality of germ cells are crucial for the perpetuation of species, yet the mechanisms that regulate these properties remain elusive. In C.elegans, a histone methyltransferase MES-4 is required for survival of the primordial germ cells. MES-4 methylates histone H3 at lysine 36 (H3K36), a modification previously linked to transcription elongation and involved in preventing aberrant transcription initiation within the body of genes. Surprisingly, our genome-wide analysis of MES-4 binding sites in C. elegans embryos revealed that MES-4 is capable of associating with genes that were expressed in the germ line of the parent worms but are no longer being actively transcribed in embryos. To our knowledge, this is the first example of transcription-uncoupled H3K36 methylation. We suggest that MES-4-generated H3K36 methylation serves an “epigenetic role,” by marking germline-expressed genes and by carrying the memory of gene expression from one generation of germ cells to the next.
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Affiliation(s)
- Andreas Rechtsteiner
- Department of Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Sevinc Ercan
- Department of Biology, Carolina Center for Genome Sciences and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Teruaki Takasaki
- Department of Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Taryn M. Phippen
- Department of Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Thea A. Egelhofer
- Department of Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Wenchao Wang
- Department of Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, California, United States of America
| | - Hiroshi Kimura
- Graduate School for Frontier Biosciences, Osaka University, Suita, Osaka, Japan
| | - Jason D. Lieb
- Department of Biology, Carolina Center for Genome Sciences and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
- * E-mail: (SS); (JDL)
| | - Susan Strome
- Department of Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, California, United States of America
- * E-mail: (SS); (JDL)
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Furuhashi H, Takasaki T, Rechtsteiner A, Li T, Kimura H, Checchi PM, Strome S, Kelly WG. Trans-generational epigenetic regulation of C. elegans primordial germ cells. Epigenetics Chromatin 2010; 3:15. [PMID: 20704745 PMCID: PMC3146070 DOI: 10.1186/1756-8935-3-15] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Accepted: 08/12/2010] [Indexed: 12/21/2022] Open
Abstract
Background The processes through which the germline maintains its continuity across generations has long been the focus of biological research. Recent studies have suggested that germline continuity can involve epigenetic regulation, including regulation of histone modifications. However, it is not clear how histone modifications generated in one generation can influence the transcription program and development of germ cells of the next. Results We show that the histone H3K36 methyltransferase maternal effect sterile (MES)-4 is an epigenetic modifier that prevents aberrant transcription activity in Caenorhabditis elegans primordial germ cells (PGCs). In mes-4 mutant PGCs, RNA Pol II activation is abnormally regulated and the PGCs degenerate. Genetic and genomewide analyses of MES-4-mediated H3K36 methylation suggest that MES-4 activity can operate independently of ongoing transcription, and may be predominantly responsible for maintenance methylation of H3K36 in germline-expressed loci. Conclusions Our data suggest a model in which MES-4 helps to maintain an 'epigenetic memory' of transcription that occurred in germ cells of previous generations, and that MES-4 and its epigenetic product are essential for normal germ cell development.
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Affiliation(s)
- Y Hoshino
- Yatsu-hoken Hospital, Narashino-shi, Chiba, Japan
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27
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Mizuno Y, Kotaki A, Harada F, Tajima S, Kurane I, Takasaki T. Confirmation of dengue virus infection by detection of dengue virus type 1 genome in urine and saliva but not in plasma. Trans R Soc Trop Med Hyg 2007; 101:738-9. [PMID: 17418320 DOI: 10.1016/j.trstmh.2007.02.007] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [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: 11/07/2006] [Revised: 02/05/2007] [Accepted: 02/05/2007] [Indexed: 10/23/2022] Open
Abstract
We successfully detected dengue virus (DENV) genome in urine and saliva but not in plasma samples from a Japanese dengue fever patient. The results of the present study suggest that detection of DENV genome in urine and saliva can be an effective diagnostic method, particularly for children with viral hemorrhage.
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Affiliation(s)
- Y Mizuno
- Disease Control and Prevention Centre, International Medical Centre of Japan, 1-21-1, Toyama, Shinjuku, Tokyo 162-8655, Japan.
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28
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Takasaki T, Liu Z, Habara Y, Nishiwaki K, Nakayama JI, Inoue K, Sakamoto H, Strome S. MRG-1, an autosome-associated protein, silences X-linked genes and protects germline immortality in Caenorhabditis elegans. Development 2007; 134:757-67. [PMID: 17215300 PMCID: PMC2435364 DOI: 10.1242/dev.02771] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
MRG15, a mammalian protein related to the mortality factor MORF4, is required for cell proliferation and embryo survival. Our genetic analysis has revealed that the Caenorhabditis elegans ortholog MRG-1 serves similar roles. Maternal MRG-1 promotes embryo survival and is required for proliferation and immortality of the primordial germ cells (PGCs). As expected of a chromodomain protein, MRG-1 associates with chromatin. Unexpectedly, it is concentrated on the autosomes and not detectable on the X chromosomes. This association is not dependent on the autosome-enriched protein MES-4. Focusing on possible roles of MRG-1 in regulating gene expression, we determined that MRG-1 is required to maintain repression in the maternal germ line of transgenes on extrachromosomal arrays, and of several X-linked genes previously shown to depend on MES-4 for repression. MRG-1 is not required for PGCs to acquire transcriptional competence or for the turn-on of expression of several PGC-expressed genes (pgl-1, glh-1, glh-4 and nos-1). By contrast to this result in PGCs, MRG-1 is required for ectopic expression of those germline genes in somatic cells lacking the NuRD complex component MEP-1. We discuss how an autosome-enriched protein might repress genes on the X chromosome, promote PGC proliferation and survival, and influence the germ versus soma distinction.
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Affiliation(s)
- Teruaki Takasaki
- Department of Biology, Graduate School of Science and Technology, Kobe University, 1-1 Rokkodaicho, Nadaku, Kobe 657-8501, Japan
| | - Zheng Liu
- Department of Biology, Indiana University, Bloomington, IN 47405, USA
| | - Yasuaki Habara
- Department of Biology, Graduate School of Science and Technology, Kobe University, 1-1 Rokkodaicho, Nadaku, Kobe 657-8501, Japan
| | - Kiyoji Nishiwaki
- RIKEN Center for Developmental Biology, Chuoku, Kobe 650-0047, Japan
| | - Jun-ichi Nakayama
- RIKEN Center for Developmental Biology, Chuoku, Kobe 650-0047, Japan
| | - Kunio Inoue
- Department of Biology, Graduate School of Science and Technology, Kobe University, 1-1 Rokkodaicho, Nadaku, Kobe 657-8501, Japan
| | - Hiroshi Sakamoto
- Department of Biology, Graduate School of Science and Technology, Kobe University, 1-1 Rokkodaicho, Nadaku, Kobe 657-8501, Japan
| | - Susan Strome
- Department of Biology, Indiana University, Bloomington, IN 47405, USA
- Author for correspondence (e-mail: )
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Takasaki T, Moriya Y, Okada K, Yamamoto K, Iwanami H, Bessho H, Nakanishi T. cDNA cloning of nine S alleles and establishment of a PCR-RFLP system for genotyping European pear cultivars. Theor Appl Genet 2006; 112:1543-52. [PMID: 16565843 DOI: 10.1007/s00122-006-0257-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2005] [Accepted: 03/06/2006] [Indexed: 05/08/2023]
Abstract
Nine full-length cDNAs of S ribonucleases (S-RNases) were cloned from stylar RNA of European pear cultivars by RT-PCR and 3' and 5' RACE. Comparison of the nucleotide sequences between the nine S-RNases cloned and 13 putative S alleles previously amplified by genomic PCRs revealed that seven corresponded to Sa, Sb, Sd, Se, Sh, Sk and Sl alleles, and the other two were new S alleles (designated as Sq and Sr alleles). Genomic PCR with a set of a8FTQQYQa9 and a8EP-anti-IIWPNVa9 primers was used to amplify nine S alleles; 1,414 bp (Sl), ca. 1.3 kb (Sk and Sq), 998 bp (Se), 440 bp (Sb) and ca. 350 bp (Sa, Sd, Sh and Sr). Among these, S alleles of similar size were discriminated by digestion with BaeI, BglII, BssHII, HindIII, EcoO109I and SphI. The PCR amplification of S allele following digestion with the restriction enzymes provided a PCR-RFLP system for rapid S-genotyping European pear cultivars harboring nine S alleles. The PCR-RFLP system assigned a total of 63 European pear cultivars to 25 genotypes. Among these, 14 genotypes were shared by two or more cultivars, which were cross-incompatible. These results suggested that the genes cloned represented the S-RNases from European pear, and that there were many cross-incompatible combinations among European pear varieties.
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Affiliation(s)
- T Takasaki
- Faculty of Agriculture, Kobe University, Kobe 657-8501, Japan.
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Nawa M, Takasaki T, Ito M, Inoue S, Morita K, Kurane I. Immunoglobulin A antibody responses in dengue patients: a useful marker for serodiagnosis of dengue virus infection. Clin Diagn Lab Immunol 2005; 12:1235-7. [PMID: 16210489 PMCID: PMC1247829 DOI: 10.1128/cdli.12.10.1235-1237.2005] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We determined the usefulness of an immunoglobulin A (IgA) antibody-capture enzyme-linked immunosorbent assay for serodiagnosis of dengue virus infections. The results indicate that the presence of IgA and IgM in serum samples assures recent primary dengue virus infection even with a single serum sample.
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Affiliation(s)
- M Nawa
- Department of Microbiology, Saitama Medical School 38, Moroyama, Saitama 350-0495, Japan.
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Affiliation(s)
- M Kunishige
- Department of Medicine and Bioregulatory Sciences, University of Tokushima Graduate School of Medicine, 3-18-15, Kuramoto, Tokushima 770-8503, Japan.
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Mizutani T, Kobayashi M, Eshita Y, Shirato K, Kimura T, Ako Y, Miyoshi H, Takasaki T, Kurane I, Kariwa H, Umemura T, Takashima I. Involvement of the JNK-like protein of the Aedes albopictus mosquito cell line, C6/36, in phagocytosis, endocytosis and infection of West Nile virus. Insect Mol Biol 2003; 12:491-499. [PMID: 12974954 DOI: 10.1046/j.1365-2583.2003.00435.x] [Citation(s) in RCA: 36] [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] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We recently cloned a c-Jun amino-terminal kinase (JNK) sequence from the C6/36 cell line, derived from the mosquito Aedes albopictus. We showed that SP600125, an inhibitor of JNK proteins, inhibits phagocytosis by C6/36 cells, suggesting that the JNK-like protein regulates phagocytosis. Here, we show that C6/36 cells constitutively express low levels of mRNA encoding the antibacterial peptides, cecropin and defensin, but that these mRNAs were up-regulated upon stimulation by lipopolysaccharide (LPS). Thus, the C6/36 cells have properties similar to those of mammalian macrophages. To characterize further the functional properties of C6/36 cells, we have assayed the role of the JNK-like protein in phagocytosis, endocytosis, and viral infection. C6/36 cells phagocytosed bacteria and artificial beads, and this was only slightly up-regulated following LPS stimulation, suggesting that newly stimulated JNK-like protein was not necessary for phagocytosis. SP600125 inhibited the acidification of intracellular compartments, including those involved in the endocytic pathway. Pretreatment of C6/36 cells with SP600125 or bafilomycin A1, but not cytochalasin D, inhibited the entry of West Nile virus (WNV), suggesting that WNV is internalized mainly by endocytosis, and that the JNK signalling pathway is important for endocytic entry. These findings indicate that the JNK-like protein regulates basic physiological functions, including phagocytosis and endocytosis and infection of WNV.
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Affiliation(s)
- T Mizutani
- Laboratory of Public Health, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan.
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Yoda M, Nonoyama M, Shimakura T, Morishita A, Takasaki T. [Preoperative autologous blood donation with cardiac surgery]. Kyobu Geka 2003; 56:479-82. [PMID: 12795154] [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: 03/03/2023]
Abstract
BACKGROUND Preoperative autologous blood donation is commonly used to reduce exposure to homologous blood transfusions among patients undergoing elective cardiac surgery. The purpose of this study was to ascertain how much volume of predonated autologous blood need to avoid of homologous blood transfusion in cardiac procedure. METHODS One hundred twenty-eight patients underwent scheduled cardiac procedure between January 1998 and December 1999. Group 1: 400 ml predonated, operation without cardiopulmonary bypass (CPB) [n = 33], group 2: 800 ml predonated, operation without CPB (n = 23), group 3: 800 ml predonated, operation with CPB (n = 36), group 4: 1,200 ml predonated, operation with CPB (n = 36). Surgical procedures underwent only off-pump coronary artery bypass grafting (OPCAB) in groups 1 and 2. In groups 3 and 4 included coronary artery bypass grafting (CABG), valve replacement, CABG + valve replacement and atrial septal defect repair. RESULTS There were no significant differences in mean body weight, mean preoperative hematocrit values or mean volume of intraoperative blood loss between groups 1 and 2. There were no significant differences in mean age, mean body weight, mean preoperative and postoperative day-7 hematocrit values, mean volume of intraoperative blood loss or mean CPB time between groups 3 and 4. The mean postoperative day-7 hematocrit value was significantly lower in group 1 than in group 2. Homologous blood transfusion was avoided in 63.6% of those with predonation of group 1 versus 100% at group 2 (p < 0.05), 86.1% at group 3 versus 94.4% at group 4 (p < 0.05). In group 3, all patients who underwent redo operation or CABG + valve replacement needed homologous blood transfusion. CONCLUSIONS Autologous blood transfusion is effective for reducing the homologous blood requirement. It also seems that predonation of 800 ml may be sufficient to avoid homologous blood transfusion in cardiac surgery, however predonation of 1,200 ml is desirable in cases of redo operation or CABG + valve replacement.
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Affiliation(s)
- M Yoda
- Department of Cardiovascular Surgery, Fukuyama Circulation Hospital, Fukuyama, Japan
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Fujita M, Takasaki T, Nakajima N, Kawano T, Shimura Y, Sakamoto H. Corrigendum to “MRG-1, a mortality factor-related chromodomain protein, is required maternally for primordial germ cells to initiate mitotic proliferation in C. elegans”. Mech Dev 2003. [DOI: 10.1016/s0925-4773(02)00414-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Fujita M, Takasaki T, Nakajima N, Kawano T, Shimura Y, Sakamoto H. MRG-1, a mortality factor-related chromodomain protein, is required maternally for primordial germ cells to initiate mitotic proliferation in C. elegans. Mech Dev 2002; 114:61-9. [PMID: 12175490 DOI: 10.1016/s0925-4773(02)00058-8] [Citation(s) in RCA: 29] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We identified MRG-1, a Caenorhabditis elegans chromodomain-containing protein that is similar to the human mortality factor-related gene 15 product (MRG15). RNA-mediated interference (RNAi) of mrg-1 resulted in complete absence of the germline in both hermaphrodite and male adults. Examination of the expression of PGL-1, a component of P granules, revealed that two primordial germ cells (PGCs) are produced during embryogenesis in mrg-1(RNAi) animals, but these PGCs cannot undergo mitotic proliferation, and they ultimately degenerate during post-embryonic development. Zygotic RNAi experiments using RNAi-deficient hermaphrodites and wild-type males demonstrated that MRG-1 functions maternally. Moreover, immunoblot analysis using mutant animals with germline deficiencies indicated that MRG-1 is synthesized predominantly in oocytes. These results suggest that MRG-1 is required maternally to form normal PGCs with the potential to start mitotic proliferation during post-embryonic development.
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Affiliation(s)
- Masaki Fujita
- Department of Life Science, Graduate School of Science and Technology, Kobe University, 1-1 Rokkodaicho, Nadaku, Kobe 657-8501, Japan
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Morishita A, Shimakura T, Nonoyama M, Takasaki T. Mitral valve replacement in ischemic mitral regurgitation. Preservation of both anterior and posterior mitral leaflets. J Cardiovasc Surg (Torino) 2002; 43:147-52. [PMID: 11887046] [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: 02/24/2023]
Abstract
BACKGROUND The surgical risks associated with ischemic mitral regurgitation are thought to be greater than those for other forms of mitral regurgitation. We have performed mitral valve replacement using the St. Jude Medical bileaflet prostheses with preservation of both leaflets, along with all of the chordae tendineae and papillary muscles. The aim of this study was to retrospectively evaluate mitral valve replacement with preservation of both mitral valves with respect to long-term clinical results and left ventricular performance. METHODS Between January 1, 1988 and February 29, 2000, 15 patients were operated on for ischemic mitral regurgitation. There were 7 males and 8 females, and the mean age was 69.7+/-8.1 years. The preoperative variables showed clinical deterioration of the state, such as emergency operation in 40% of the patients, more than NYHA functional III class in 93% of patients, cardiogenic shock in 47% of the patients, a mean left ventricular ejection fraction of 36.8%, and a mean left ventricular end-systolic volume index of 116.7 ml/m2. RESULTS There were 5 (33.3%) hospital deaths during the follow-up period including 1 early death and 1 (10%) late death during the follow-up period. Thus, the actuarial survival rate after 5 years for the whole was 60%. However, the left ventricular dimensions and left ventricular fractional shortening, even if in patients with profound depressed left ventricular function preoperatively, showed maintenance of the cardiac function. CONCLUSIONS These results suggested that mitral valve replacement using the St. Jude Medical prostheses with preservation of both leaflets and all chordae tendineae and papillary muscles might be a procedure of choice for ischemic mitral regurgitation.
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Affiliation(s)
- A Morishita
- Department of Cardiovascular Surgery, Fukuyama Cardiovascular Hospital, Fukuyama-shi, Hiroshima, Japan.
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Ito M, Itou T, Sakai T, Santos MF, Arai YT, Takasaki T, Kurane I, Ito FH. Detection of rabies virus RNA isolated from several species of animals in Brazil by RT-PCR. J Vet Med Sci 2001; 63:1309-13. [PMID: 11789609 DOI: 10.1292/jvms.63.1309] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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: 11/22/2022] Open
Abstract
Brain samples from different animal species including humans: five vampire bats, 14 cattle, 12 dogs, 11 cats, two horses, one pig, one sheep and three humans collected from various geographical regions of Brazil were found to be positive for rabies by means of the fluorescent antibody test (FAT) and the mouse inoculation test (MIT). The brain samples were retested for rabies by means of the reverse transcription and polymerase chain reaction (RT-PCR) with 2 primer sets (P1/P2 and RHNI/RHNS3), which amplified full or partial regions on the nucleoprotein (N) gene of the rabies virus, respectively. Brain samples from five vampire bats, 13 cattle, one horse and one sheep failed to yield PCR products when the RHN1/RHNS3 primer pair was used, but all brain samples successfully yielded the products when the P1/P2 primer pair was used. These results suggest that Brazilian rabies virus isolates could be principally divided into two populations according to genetic difference.
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Affiliation(s)
- M Ito
- Department of Preventive Veterinary Medicine and Animal Health, Nihon University School of Veterinary Medicine, Fujisawa, Kanagawa, Japan
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Abstract
Dengue virus infections are a serious cause of morbidity and mortality in most tropical and subtropical areas of the world: mainly Southeast and South Asia, Central and South America, and the Caribbean. Understanding the pathogenesis of dengue haemorrhagic fever (DHF), the severe form of dengue illness, is a very important and challenging research subject. Viral virulence and immune responses have been considered as two major factors responsible for the pathogenesis. Virological studies are attempting to define the molecular basis of viral virulence. The immunopathological mechanisms appear to include a complex series of immune responses. A rapid increase in the levels of cytokines and chemical mediators apparently plays a key role in inducing plasma leakage, shock and haemorrhagic manifestations. It is likely that the entire process is initiated by infection with a so-called virulent dengue virus, often with the help of enhancing antibodies in secondary infection, and then triggered by rapidly elevated cytokines and chemical mediators produced by intense immune activation. However, understanding of the DHF pathogenesis is not complete. We still have a long way to go.
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Affiliation(s)
- I Kurane
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan.
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Yamada K, Takasaki T, Nawa M, Kurane I. Increase in the sensitivity of dengue diagnosis by combination of reverse transcriptase-polymerase chain reaction and passage on cell cultures. Southeast Asian J Trop Med Public Health 2001; 32:470-1. [PMID: 11944700] [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: 02/24/2023]
Abstract
We passaged 52 serum samples from dengue patients on C6/36 cells for 7 days and checked the culture fluids by RT-PCR. Two serum samples, which were negative by direct RT-PCR, became positive. One sample was collected on fever day 1 and the other on fever day 2. Results indicate that combination of reverse transcriptase-polymerase chain reaction (RT-PCR) with passage of serum samples on C6/36 cells increases the sensitivity of dengue diagnosis.
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Affiliation(s)
- K Yamada
- Department of Virology 1, National Institute of Infectious Diseases, Tokyo, Japan.
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Ito M, Arai YT, Itou T, Sakai T, Ito FH, Takasaki T, Kurane I. Genetic characterization and geographic distribution of rabies virus isolates in Brazil: identification of two reservoirs, dogs and vampire bats. Virology 2001; 284:214-22. [PMID: 11384221 DOI: 10.1006/viro.2000.0916] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [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: 11/22/2022]
Abstract
We analyzed 50 rabies virus samples isolated in Brazil from 12 dogs, 11 cats, 5 vampire bats, 15 cattle, 2 horses, 1 pig, 1 sheep, and 3 humans to investigate the molecular epidemiology of rabies viruses. We sequenced 203 nucleotides on the nucleoprotein gene by direct sequencing of the PCR-amplified products. All the isolates belonged to the genotype 1 and homology of the 203 nucleotides was at least 83.7% among isolates. The main reservoirs were estimated based on the homology of nucleotide sequences. Brazilian rabies virus isolates were clustered into two reservoir groups: dogs and vampire bats. All the dog-related rabies virus isolates showed nucleotide homology greater than 99.0%. Vampire bat-related rabies virus isolates showed nucleotide homology greater than 96.6% and could be further divided into subgroups corresponding to areas where viruses were isolated. These data suggest that circulating rabies variants belong to at least two different genotype clusters in Brazil and that these two clusters are maintained independently among vampire bats and dogs.
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Affiliation(s)
- M Ito
- Department of Preventive Veterinary Medicine and Animal Health, Nihon University School of Veterinary Medicine, Fujisawa, Japan
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Morishita A, Shimakura T, Nonoyama M, Takasaki T, Yoda M. [A case of thrombosed St. Jude Medical valve 16 years after initial mitral valve replacement]. Kyobu Geka 2001; 54:501-4. [PMID: 11424503] [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: 02/20/2023]
Abstract
We report successful surgery for a thrombosed St. Jude Medical (SJM) valve 16 years after the initial mitral valve replacement even under conditions of satisfactory anticoagulation therapy. A 61-year-old-female had intermittent claudication and was admitted to our hospital for examination. The prosthetic valve sounds were normal to auscultation and the left ankle-pressure index was decreased to 0.6. Transthoracic echocardiography revealed no mitral regurgitation and a mean mitral valve gradient of 6-7 mmHg. Furthermore, transesophageal echocardiography revealed that one of the leaflets of the prosthetic valve was entirely immobilized at the closing position and a mobile soft tissue mass, 5 mm in diameter, was detected at the atrial side of the obstructed leaflet. Although 96,0000 IU of urokinase was administered intravenously for a week, we could not confirm any change in leaflet mobility. At the time of surgery, the posterior leaflet of the SJM valve, which was implanted at an anatomical orientation, was obstructed at the closing position with old and fresh thrombi. We decided upon replacement with a CarboMedics 29 M prosthetic valve. Postoperative medication consisted of warfarin plus low-dose aspirin. Generally, valve thrombosis occurs within 5 years after valve replacement. However, valve thrombosis is possible even in a reliable SJM valve and as long as 16 years after replacement. Therefore, the implantation of an SJM valve at an anti-anatomical orientation might lower the incidence of valve thrombosis in addition to life-long anticoagulation therapy.
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Affiliation(s)
- A Morishita
- Department of Cardiovascular Surgery, Fukuyama Cardiovascular Hospital, Hiroshima, Japan
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Morishita A, Shimakura T, Nonoyama M, Takasaki T, Yoda M. Ascending aorta dissection associated with bicuspid aortic valve. Considerations 4 years after combined coronary artery bypass grafting and mitral valve replacement. Jpn J Thorac Cardiovasc Surg 2001; 49:368-72. [PMID: 11481840 DOI: 10.1007/bf02913152] [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] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Aortic dissection etiology involve many factors that are difficult to identify clearly. We report a 47-year-old man who underwent a Bentall operation with reattachment of bypass grafts for a dissecting aneurysm (DeBakey type II) 4 years after combined triple coronary artery bypass grafting and mitral valve replacement. This case appeared to be associated with factors leading to dissecting aneurysm although it remains unclear which was more influential congenital bicuspid aortic valve or proximal anastomosis of venous grafts or both. This case suggests the need to consider appropriate timing in surgical intervention for cases of congenital bicuspid aortic valves and the selection of additional aortic valve replacement in initial surgery.
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Affiliation(s)
- A Morishita
- Department of Cardiovascular Surgery, Fukuyama Cardiovascular Hospital, Fukuyama, Japan
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Takasaki T, Takada K, Kurane I. Electron microscopic study of persistent dengue virus infection: analysis using a cell line persistently infected with Dengue-2 virus. Intervirology 2001; 44:48-54. [PMID: 11223720 DOI: 10.1159/000050030] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [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: 11/19/2022] Open
Abstract
We investigated persistent infection of Epstein-Barr virus (EBV)-transformed lymphoblastoid cells with dengue virus using a transmission electron microscope. Most of the infected cells kept an intact morphology with only a few virus particles in the cytoplasm, but without any indication of active viral replication. Some cells were apoptotic and a few dengue virus particles were present in these apoptotic cells. Raji cells acutely infected with dengue-2 virus showed degenerative morphology. There were membranous tubular structures and many virus particles around and within the infected cells. Approximately 95% of the cells were dengue viral antigen positive in the persistently infected EBV-transformed cell line. It is likely that persistent infection is maintained mainly by the division of infected cells without cytopathic effect by dengue-2 virus.
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Affiliation(s)
- T Takasaki
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan.
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Sato T, Indo H, Takasaki T, Kawabata Y, Morita Y, Noikura T. A rare case of intraosseous polymorphous low-grade adenocarcinoma (PLGA) of the maxilla. Dentomaxillofac Radiol 2001. [DOI: 10.1038/sj.dmfr.4600596] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Sato T, Indo H, Takasaki T, Kawabata Y, Morita Y, Noikura T. A rare case of intraosseous polymorphous low-grade adenocarcinoma (PLGA) of the maxilla. Dentomaxillofac Radiol 2001; 30:184-7. [PMID: 11420633 DOI: 10.1038/sj/dmfr/4600596] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2000] [Accepted: 01/17/2001] [Indexed: 11/08/2022] Open
Abstract
A rare case of intraosseous, polymorphous low-grade adenocarcinoma (PLGA) of the maxilla is presented. The lesion appeared to be cystic radiographically and the only finding which suggested malignancy was an irregular cortical border.
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Affiliation(s)
- T Sato
- Department of Dental Radiology, Kagoshima University Dental School, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
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Hatakeyama K, Takasaki T, Suzuki G, Nishio T, Watanabe M, Isogai A, Hinata K. The S receptor kinase gene determines dominance relationships in stigma expression of self-incompatibility in Brassica. Plant J 2001; 26:69-76. [PMID: 11359611 DOI: 10.1046/j.1365-313x.2001.01009.x] [Citation(s) in RCA: 26] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Self-incompatibility (SI) in Brassica is sporophytically controlled by the multi-allelic S locus. SI phenotypes of the stigma and pollen in an S heterozygote are determined by the two S haplotypes it carries; the two haplotypes may be co-dominant or exhibit a dominant/recessive relationship. Because the S receptor kinase (SRK) gene of the S locus was recently shown to determine the S haplotype specificity of the stigma, we wished to investigate whether SRK also plays a role in the dominance relationships between S haplotypes. We crossed plants carrying an SRK28 transgene with plants homozygous for one of five S haplotypes that are either co-dominant with, or recessive to, S28 haplotype in the stigma, and analyzed the SI phenotypes of the progeny. In all cases, the SI phenotype of the stigma of plants carrying the SRK28 transgene could be predicted by the known dominance relationships between the S haplotype(s) and the S28 haplotype. Moreover, in the S43 homozygote carrying the SRK28 transgene where the S43 phenotype in the stigma was masked by the presence of the SRK28, the transcript level of SRK28 was found to be much lower than that of SRK43. All these results suggest that the dominance relationships between S haplotypes in the stigma are determined by SRK, but not by virtue of its relative expression level.
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Affiliation(s)
- K Hatakeyama
- Research Institute of Seed Production Co. Ltd., 6-6-3 Minamiyoshinari, Aoba-ku, Sendai, 989-3204, Japan
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Nawa M, Takasaki T, Yamada KI, Akatsuka T, Kurane I. Development of dengue IgM-capture enzyme-linked immunosorbent assay with higher sensitivity using monoclonal detection antibody. J Virol Methods 2001; 92:65-70. [PMID: 11164919 DOI: 10.1016/s0166-0934(00)00274-3] [Citation(s) in RCA: 20] [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] [Indexed: 11/25/2022]
Abstract
An IgM-capture enzyme-linked immunosorbent assay (IgM-ELISA) is used widely for serodiagnosis of dengue. A dengue IgM-ELISA with higher sensitivity has been developed. In the new ELISA, anti-dengue IgM antibody, which had been captured on the solid phase, was reacted with tetravalent dengue viral antigens, and detected by a flavivirus group specific monoclonal antibody, D1-4G2-4-15 (4G2). Reaction of 4G2 to viral antigens was similar to that of dengue patients' IgG. Non-specific reaction of 4G2 to the control antigen, which was prepared from uninfected cell culture fluid of mosquito C6/36 cells, was much lower than that of patients' IgG. Thus, specificity of the ELISA with 4G2 was much higher than that with patients' IgG, and lower levels of specific IgM was detected in the serum samples. These results suggest that the modified dengue IgM-ELISA with monoclonal antibody 4G2 has many advantages over the original "in-house" ELISA.
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Affiliation(s)
- M Nawa
- Department of Microbiology, Saitama Medical School, 38 Moroyama, Saitama 350-0495, Japan.
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Yoda M, Nonoyama M, Shimakura T, Morishita A, Takasaki T. [Preoperative autologous blood donation in elderly patients with cardiovascular surgery]. Kyobu Geka 2001; 54:203-6. [PMID: 11244751] [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: 02/19/2023]
Abstract
BACKGROUND During the cardiovascular surgeries in elderly people, only a few cases can avoid the homologous blood transfusion, because of their preoperative anemic tendency and low hemopoietic abilities. We examined the capability to avoid the homologous blood transfusion in over 75 year old patients by the preoperative autologous blood collection. Sixty-six patients underwent scheduled cardiovascular surgery between January 1996 and December 1999. The groups were divided into three categories of preoperatively collected autologous blood amounts: high-amount (800-1,200 ml), medium-amount (200-800 ml), and low-amount (0 ml). Each group was divided into two subgroups in according to the use of cardiopulmonary bypass (CPB). There were no differences among the each group in age, body weight, or preoperative and postoperative day-7 hematocrit values. RESULTS Only 21.2% of patients could donate the expected blood amounts preoperatively. Mean volume was 641 ml. In groups used CPB, no patient was transfused homologous blood in high-amount group. On the contrary, 100% patients were donated in medium and low amount groups. In groups operated without CPB, homologous blood transfusion was required 14.3% in high-amount group, 25.0% in medium-amount group, and 83.3% in low-amount group. CONCLUSION It seems that predonation of more than 800 ml may be sufficient to avoid the homologous blood transfusion in using CPB operation and more than 400 ml in non using CPB operation.
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Affiliation(s)
- M Yoda
- Department of Cardiovascular Surgery, Fukuyama Circulation Hospital, Fukuyama, Japan
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Aihara H, Takasaki T, Toyosaki-Maeda T, Suzuki R, Okuno Y, Kurane I. T-cell activation and induction of antibodies and memory T cells by immunization with inactivated Japanese encephalitis vaccine. Viral Immunol 2001; 13:179-86. [PMID: 10892998 DOI: 10.1089/vim.2000.13.179] [Citation(s) in RCA: 12] [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: 11/12/2022] Open
Abstract
Mouse brain-derived inactivated Japanese encephalitis (JE) vaccine is the only currently internationally accepted vaccine against JE virus. We analyzed cellular and humoral immune responses to the JE vaccine in healthy adults in order to understand the protective immunity induced by this vaccine. Immunization with the JE vaccine induced T-cell activation in vivo, demonstrated by increase in the plasma levels of interleukin (IL)-2 and soluble CD8. JE virus-specific antibodies determined in radioimmunoprecipitation (RIP), hemagglutination inhibition (HI), and neutralization assays were also induced by immunization with the JE vaccine. JE virus-specific memory T cells were detected 60 days after immunization. These results suggest that protective immunity induced by the inactivated JE vaccine includes JE virus-specific T cells as well as antibodies with multiple biological activities.
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Affiliation(s)
- H Aihara
- Department of Microbiology, Kinki University School of Medicine, Osaka-sayama, Japan
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Adachi Y, Takamatsu H, Noguchi H, Tahara H, Fukushige T, Takasaki T, Yoshida A, Kamenosono A, Kikuchi J, Asatani M, Kawakami K. A malignant rhabdoid tumor of the kidney occurring concurrently with a brain tumor: report of a case. Surg Today 2001; 30:298-301. [PMID: 10752788 DOI: 10.1007/s005950050064] [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] [Indexed: 10/27/2022]
Abstract
Malignant rhabdoid tumor of the kidney (MRTK) is one of the most lethal neoplasms to occur in young infants. Cases of MRTK accompanying an embryonal tumor in the central nervous system have occasionally been described. We present herein an interesting case of MRTK that was clinically diagnosed preoperatively. A male infant aged 6 months with both a midline brain tumor and a renal neoplasm was transferred to our institution. Although roentgenographic evaluation suggested that the renal lesion was a Wilms' tumor, midkine (MK), a growth and differentiation factor characteristically present in the urine of patients with Wilms' tumor, was not detected. A preoperative diagnosis of MRTK was established based on the lack of urinary MK in addition to the typical clinical features of the young age and the concurrent brain tumor.
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Affiliation(s)
- Y Adachi
- Department of Pediatric Surgery, Faculty of Medicine, Kagoshima University, Japan
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