1
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Sampathkumar A, Zhong C, Tang Y, Fujita Y, Ito M, Shinohara A. Replication protein-A, RPA, plays a pivotal role in the maintenance of recombination checkpoint in yeast meiosis. Sci Rep 2024; 14:9550. [PMID: 38664461 PMCID: PMC11045724 DOI: 10.1038/s41598-024-60082-x] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 04/18/2024] [Indexed: 04/28/2024] Open
Abstract
DNA double-strand breaks (DSBs) activate DNA damage responses (DDRs) in both mitotic and meiotic cells. A single-stranded DNA (ssDNA) binding protein, Replication protein-A (RPA) binds to the ssDNA formed at DSBs to activate ATR/Mec1 kinase for the response. Meiotic DSBs induce homologous recombination monitored by a meiotic DDR called the recombination checkpoint that blocks the pachytene exit in meiotic prophase I. In this study, we further characterized the essential role of RPA in the maintenance of the recombination checkpoint during Saccharomyces cerevisiae meiosis. The depletion of an RPA subunit, Rfa1, in a recombination-defective dmc1 mutant, fully alleviates the pachytene arrest with the persistent unrepaired DSBs. RPA depletion decreases the activity of a meiosis-specific CHK2 homolog, Mek1 kinase, which in turn activates the Ndt80 transcriptional regulator for pachytene exit. These support the idea that RPA is a sensor of ssDNAs for the activation of meiotic DDR. Rfa1 depletion also accelerates the prophase I delay in the zip1 mutant defective in both chromosome synapsis and the recombination, consistent with the notion that the accumulation of ssDNAs rather than defective synapsis triggers prophase I delay in the zip1 mutant.
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Affiliation(s)
- Arivarasan Sampathkumar
- Institute for Protein Research, University of Osaka, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Chen Zhong
- Institute for Protein Research, University of Osaka, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yuting Tang
- Institute for Protein Research, University of Osaka, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yurika Fujita
- Institute for Protein Research, University of Osaka, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Masaru Ito
- Institute for Protein Research, University of Osaka, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Akira Shinohara
- Institute for Protein Research, University of Osaka, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
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2
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Joo JH, Hong S, Higashide MT, Choi EH, Yoon S, Lee MS, Kang HA, Shinohara A, Kleckner N, Kim KP. RPA interacts with Rad52 to promote meiotic crossover and noncrossover recombination. Nucleic Acids Res 2024; 52:3794-3809. [PMID: 38340339 DOI: 10.1093/nar/gkae083] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 01/24/2024] [Accepted: 01/27/2024] [Indexed: 02/12/2024] Open
Abstract
Meiotic recombination is initiated by programmed double-strand breaks (DSBs). Studies in Saccharomyces cerevisiae have shown that, following rapid resection to generate 3' single-stranded DNA (ssDNA) tails, one DSB end engages a homolog partner chromatid and is extended by DNA synthesis, whereas the other end remains associated with its sister. Then, after regulated differentiation into crossover- and noncrossover-fated types, the second DSB end participates in the reaction by strand annealing with the extended first end, along both pathways. This second-end capture is dependent on Rad52, presumably via its known capacity to anneal two ssDNAs. Here, using physical analysis of DNA recombination, we demonstrate that this process is dependent on direct interaction of Rad52 with the ssDNA binding protein, replication protein A (RPA). Furthermore, the absence of this Rad52-RPA joint activity results in a cytologically-prominent RPA spike, which emerges from the homolog axes at sites of crossovers during the pachytene stage of the meiotic prophase. Our findings suggest that this spike represents the DSB end of a broken chromatid caused by either the displaced leading DSB end or the second DSB end, which has been unable to engage with the partner homolog-associated ssDNA. These and other results imply a close correspondence between Rad52-RPA roles in meiotic recombination and mitotic DSB repair.
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Affiliation(s)
- Jeong H Joo
- Department of Life Sciences, Chung-Ang University, Seoul 06974, South Korea
| | - Soogil Hong
- Department of Life Sciences, Chung-Ang University, Seoul 06974, South Korea
| | - Mika T Higashide
- Institute for Protein Research, Graduate School of Science, Osaka University, Osaka 565-0871, Japan
| | - Eui-Hwan Choi
- Department of Life Sciences, Chung-Ang University, Seoul 06974, South Korea
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Deagu 41061, South Korea
| | - Seobin Yoon
- Department of Life Sciences, Chung-Ang University, Seoul 06974, South Korea
| | - Min-Su Lee
- Department of Life Sciences, Chung-Ang University, Seoul 06974, South Korea
| | - Hyun Ah Kang
- Department of Life Sciences, Chung-Ang University, Seoul 06974, South Korea
| | - Akira Shinohara
- Institute for Protein Research, Graduate School of Science, Osaka University, Osaka 565-0871, Japan
| | - Nancy Kleckner
- Department of Molecular and Cellular Biology, Harvard University, Cambridge 02138, USA
| | - Keun P Kim
- Department of Life Sciences, Chung-Ang University, Seoul 06974, South Korea
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3
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Matsuzaki K, Shinohara A, Shinohara M. Human AAA+ ATPase FIGNL1 suppresses RAD51-mediated ultra-fine bridge formation. Nucleic Acids Res 2024:gkae263. [PMID: 38597669 DOI: 10.1093/nar/gkae263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 03/09/2024] [Accepted: 03/29/2024] [Indexed: 04/11/2024] Open
Abstract
RAD51 filament is crucial for the homology-dependent repair of DNA double-strand breaks and stalled DNA replication fork protection. Positive and negative regulators control RAD51 filament assembly and disassembly. RAD51 is vital for genome integrity but excessive accumulation of RAD51 on chromatin causes genome instability and growth defects. However, the detailed mechanism underlying RAD51 disassembly by negative regulators and the physiological consequence of abnormal RAD51 persistence remain largely unknown. Here, we report the role of the human AAA+ ATPase FIGNL1 in suppressing a novel type of RAD51-mediated genome instability. FIGNL1 knockout human cells were defective in RAD51 dissociation after replication fork restart and accumulated ultra-fine chromosome bridges (UFBs), whose formation depends on RAD51 rather than replication fork stalling. FIGNL1 suppresses homologous recombination intermediate-like UFBs generated between sister chromatids at genomic loci with repeated sequences such as telomeres and centromeres. These data suggest that RAD51 persistence per se induces the formation of unresolved linkage between sister chromatids resulting in catastrophic genome instability. FIGNL1 facilitates post-replicative disassembly of RAD51 filament to suppress abnormal recombination intermediates and UFBs. These findings implicate FIGNL1 as a key factor required for active RAD51 removal after processing of stalled replication forks, which is essential to maintain genome stability.
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Affiliation(s)
- Kenichiro Matsuzaki
- Department of Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara City, Nara 631-8505, Japan
| | - Akira Shinohara
- Laboratory of Genome and Chromosome Functions, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Miki Shinohara
- Department of Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara City, Nara 631-8505, Japan
- Agricultural Technology and Innovation Research Institute, Kindai University, Nara City, Nara 631-8505, Japan
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4
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Dash S, Joshi S, Pankajam AV, Shinohara A, Nishant KT. Heterozygosity alters Msh5 binding to meiotic chromosomes in the baker's yeast. Genetics 2024; 226:iyad214. [PMID: 38124392 DOI: 10.1093/genetics/iyad214] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/11/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023] Open
Abstract
Meiotic crossovers are initiated from programmed DNA double-strand breaks. The Msh4-Msh5 heterodimer is an evolutionarily conserved mismatch repair-related protein complex that promotes meiotic crossovers by stabilizing strand invasion intermediates and joint molecule structures such as Holliday junctions. In vivo studies using homozygous strains of the baker's yeast Saccharomyces cerevisiae (SK1) show that the Msh4-Msh5 complex associates with double-strand break hotspots, chromosome axes, and centromeres. Many organisms have heterozygous genomes that can affect the stability of strand invasion intermediates through heteroduplex rejection of mismatch-containing sequences. To examine Msh4-Msh5 function in a heterozygous context, we performed chromatin immunoprecipitation and sequencing (ChIP-seq) analysis in a rapidly sporulating hybrid S. cerevisiae strain (S288c-sp/YJM789, containing sporulation-enhancing QTLs from SK1), using SNP information to distinguish reads from homologous chromosomes. Overall, Msh5 localization in this hybrid strain was similar to that determined in the homozygous strain (SK1). However, relative Msh5 levels were reduced in regions of high heterozygosity, suggesting that high mismatch densities reduce levels of recombination intermediates to which Msh4-Msh5 binds. Msh5 peaks were also wider in the hybrid background compared to the homozygous strain (SK1). We determined regions containing heteroduplex DNA by detecting chimeric sequence reads with SNPs from both parents. Msh5-bound double-strand break hotspots overlap with regions that have chimeric DNA, consistent with Msh5 binding to heteroduplex-containing recombination intermediates.
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Affiliation(s)
- Suman Dash
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695551, India
| | - Sameer Joshi
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695551, India
| | - Ajith V Pankajam
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695551, India
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Koodali T Nishant
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695551, India
- Center for High-Performance Computing, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695551, India
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5
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Ito M, Fujita Y, Shinohara A. Positive and negative regulators of RAD51/DMC1 in homologous recombination and DNA replication. DNA Repair (Amst) 2024; 134:103613. [PMID: 38142595 DOI: 10.1016/j.dnarep.2023.103613] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 12/10/2023] [Accepted: 12/10/2023] [Indexed: 12/26/2023]
Abstract
RAD51 recombinase plays a central role in homologous recombination (HR) by forming a nucleoprotein filament on single-stranded DNA (ssDNA) to catalyze homology search and strand exchange between the ssDNA and a homologous double-stranded DNA (dsDNA). The catalytic activity of RAD51 assembled on ssDNA is critical for the DNA-homology-mediated repair of DNA double-strand breaks in somatic and meiotic cells and restarting stalled replication forks during DNA replication. The RAD51-ssDNA complex also plays a structural role in protecting the regressed/reversed replication fork. Two types of regulators control RAD51 filament formation, stability, and dynamics, namely positive regulators, including mediators, and negative regulators, so-called remodelers. The appropriate balance of action by the two regulators assures genome stability. This review describes the roles of positive and negative RAD51 regulators in HR and DNA replication and its meiosis-specific homolog DMC1 in meiotic recombination. We also provide future study directions for a comprehensive understanding of RAD51/DMC1-mediated regulation in maintaining and inheriting genome integrity.
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Affiliation(s)
- Masaru Ito
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan.
| | - Yurika Fujita
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan.
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan.
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6
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Fajish G, Challa K, Salim S, Vp A, Mwaniki S, Zhang R, Fujita Y, Ito M, Nishant KT, Shinohara A. DNA double-strand breaks regulate the cleavage-independent release of Rec8-cohesin during yeast meiosis. Genes Cells 2024; 29:86-98. [PMID: 37968127 DOI: 10.1111/gtc.13081] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 10/28/2023] [Accepted: 11/02/2023] [Indexed: 11/17/2023]
Abstract
The mitotic cohesin complex necessary for sister chromatid cohesion and chromatin loop formation shows local and global association to chromosomes in response to DNA double-strand breaks (DSBs). Here, by genome-wide binding analysis of the meiotic cohesin with Rec8, we found that the Rec8-localization profile along chromosomes is altered from middle to late meiotic prophase I with cleavage-independent dissociation. Each Rec8-binding site on the chromosome axis follows a unique alternation pattern with dissociation and probably association. Centromeres showed altered Rec8 binding in late prophase I relative to mid-prophase I, implying chromosome remodeling of the regions. Rec8 dissociation ratio per chromosome is correlated well with meiotic DSB density. Indeed, the spo11 mutant deficient in meiotic DSB formation did not change the distribution of Rec8 along chromosomes in late meiotic prophase I. These suggest the presence of a meiosis-specific regulatory pathway for the global binding of Rec8-cohesin in response to DSBs.
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Affiliation(s)
- Ghanim Fajish
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Kiran Challa
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Sagar Salim
- School of Biology, Indian Institute of Science, Education and Research, Thiruvananthapuram, India
| | - Ajith Vp
- School of Biology, Indian Institute of Science, Education and Research, Thiruvananthapuram, India
| | - Stephen Mwaniki
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Ruihao Zhang
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Yurika Fujita
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Masaru Ito
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Koodali T Nishant
- School of Biology, Indian Institute of Science, Education and Research, Thiruvananthapuram, India
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
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7
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Ueki D, Suzuki S, Ohta T, Shinohara A, Ohashi Y, Konuma D, Ryushima Y, Udagawa R, Motoshige H, Ieoka M, Taji A, Kogure Y, Hiraike M, Uoi M, Ino K, Kawasaki T, Yamaguchi M. Cancer-Chemotherapy-Related Regimen Checks Performed by Pharmacists of General Hospitals Other than Cancer Treatment Collaborative Base Hospitals: A Multicenter, Prospective Survey. Pharmacy (Basel) 2023; 12:1. [PMID: 38392922 PMCID: PMC10891652 DOI: 10.3390/pharmacy12010001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/14/2023] [Accepted: 12/17/2023] [Indexed: 02/25/2024] Open
Abstract
Although prescription review is an important role for pharmacists in anticancer drug therapy, there are no guidelines in Japan that specify what pharmacists should check for in chemotherapy regimens. This prospective multicenter survey aimed to investigate the implementation of chemotherapy regimen checks by pharmacists in general hospitals by focusing on 19 recommended confirmation items designed to enhance chemotherapy safety. This study involved 14 hospitals within the National Hospital Organization in different regions of Japan. The top five cancers in Japan (gastric, colorectal, lung, breast, and gynecological) were targeted and specific chemotherapy regimens were analyzed. This study assessed the amount of time required for regimen checks, the number of confirmation items completed, the number and the content of inquiries raised regarding prescriptions, and the pharmacists' opinions using a questionnaire that had a maximum score of 10 points. Pharmacists checked 345 and 375 chemotherapies of patients in the control group (CG) and recommended items group (RIG), respectively. The mean time periods required for completing a chemotherapy regimen check were 4 min and 14 s (SD ±1 min and 50 s) and 6 min and 18 s (SD, ±1 min and 7 s) in the CG and RIG, respectively. The mean of the recommended items for the CG = 12.4 and for the RIG = 18.6. The items that the pharmacists did not confirm included urine protein (sixty-nine cases, 18.4%), allergy history (four cases, 1%), previous history (two cases, 0.5%), and a previous history of hepatitis B virus (sixty-nine cases, 18.4%). The number of inquiries for a doctor's prescription order was higher in the RIG than in the CG (41 vs. 27 cases). This multicenter survey demonstrated the potential effectiveness of implementing 19 recommended confirmation items in the regimen checks by pharmacists in general hospitals other than cancer treatment collaborative base hospitals.
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Affiliation(s)
- Daisuke Ueki
- Department of Pharmacy, National Hospital Organization Tokyo National Hospital, Tokyo 204-8585, Japan
| | - Shinya Suzuki
- Department of Pharmacy, National Cancer Center Hospital East, Chiba 277-8577, Japan
| | - Takahiro Ohta
- Department of Pharmacy, National Hospital Organization Tokyo Medical Center, Tokyo 152-8902, Japan
| | - Akira Shinohara
- Department of Pharmacy, National Cancer Center Hospital East, Chiba 277-8577, Japan
| | - Yasukata Ohashi
- Department of Pharmacy, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Daisuke Konuma
- Department of Pharmacy, National Hospital Organization Chiba Medical Center, Chiba 260-8606, Japan
| | - Yasuaki Ryushima
- Department of Pharmacy, National Hospital Organization Saitama Hospital, Saitama 351-0102, Japan
| | - Ryoko Udagawa
- Department of Pharmacy, National Cancer Center Hospital, Tokyo 104-0045, Japan
| | - Hironori Motoshige
- Department of Pharmacy, National Hospital Organization Hokkaido Medical Center, 5-7 Yamanote, Nishi-ku, Sapporo 063-0005, Japan
| | - Masahiro Ieoka
- Department of Pharmacy, National Hospital Organization Hamada Medical Center, Matsue 697-8511, Japan
| | - Akihiro Taji
- Department of Pharmacy, National Hospital Organization Osaka Minami Medical Center, Osaka 586-8521, Japan
| | - Yuuki Kogure
- Department of Pharmacy, National Hospital Organization Higashihiroshima Medical Center, Hiroshima 739-0041, Japan
| | - Mikako Hiraike
- Department of Pharmacy, National Hospital Organization Kumamoto Medical Center, Kumamoto 860-0008, Japan
| | - Miyuki Uoi
- Department of Pharmacy, National Hospital Organization Kyusyu Cancer Center, Fukuoka 811-1395, Japan
| | - Kazuhiko Ino
- Department of Pharmacy, National Hospital Organization Tokyo National Hospital, Tokyo 204-8585, Japan
| | - Toshikatsu Kawasaki
- Department of Pharmacy, National Cancer Center Hospital East, Chiba 277-8577, Japan
| | - Masakazu Yamaguchi
- Department of Pharmacy, Cancer Institute Hospital, Tokyo 135-8550, Japan
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Liu S, Shinohara A, Furukohri A. Fanconi anemia-associated mutation in RAD51 compromises the coordinated action of DNA-binding and ATPase activities. J Biol Chem 2023; 299:105424. [PMID: 37924868 PMCID: PMC10716581 DOI: 10.1016/j.jbc.2023.105424] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/16/2023] [Accepted: 10/25/2023] [Indexed: 11/06/2023] Open
Abstract
Fanconi anemia (FA) is a rare genetic disease caused by a defect in DNA repair pathway for DNA interstrand crosslinks. These crosslinks can potentially impede the progression of the DNA replication fork, consequently leading to DNA double-strand breaks. Heterozygous RAD51-Q242R mutation has been reported to cause FA-like symptoms. However, the molecular defect of RAD51 underlying the disease is largely unknown. In this study, we conducted a biochemical analysis of RAD51-Q242R protein, revealing notable deficiencies in its DNA-dependent ATPase activity and its ATP-dependent regulation of DNA-binding activity. Interestingly, although RAD51-Q242R exhibited the filament instability and lacked the ability to form displacement loop, it efficiently stimulated the formation of displacement loops mediated by wild-type RAD51. These findings facilitate understanding of the biochemical properties of the mutant protein and how RAD51 works in the FA patient cells.
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Affiliation(s)
- Sijia Liu
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Asako Furukohri
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan.
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9
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Ito M, Furukohri A, Matsuzaki K, Fujita Y, Toyoda A, Shinohara A. FIGNL1 AAA+ ATPase remodels RAD51 and DMC1 filaments in pre-meiotic DNA replication and meiotic recombination. Nat Commun 2023; 14:6857. [PMID: 37891173 PMCID: PMC10611733 DOI: 10.1038/s41467-023-42576-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
The formation of RAD51/DMC1 filaments on single-stranded (ss)DNAs essential for homology search and strand exchange in DNA double-strand break (DSB) repair is tightly regulated. FIGNL1 AAA+++ ATPase controls RAD51-mediated recombination in human cells. However, its role in gametogenesis remains unsolved. Here, we characterized a germ line-specific conditional knockout (cKO) mouse of FIGNL1. Fignl1 cKO male mice showed defective chromosome synapsis and impaired meiotic DSB repair with the accumulation of RAD51/DMC1 on meiotic chromosomes, supporting a positive role of FIGNL1 in homologous recombination at a post-assembly stage of RAD51/DMC1 filaments. Fignl1 cKO spermatocytes also accumulate RAD51/DMC1 on chromosomes in pre-meiotic S-phase. These RAD51/DMC1 assemblies are independent of meiotic DSB formation. We also showed that purified FIGNL1 dismantles RAD51 filament on double-stranded (ds)DNA as well as ssDNA. These results suggest an additional role of FIGNL1 in limiting the non-productive assembly of RAD51/DMC1 on native dsDNAs during pre-meiotic S-phase and meiotic prophase I.
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Affiliation(s)
- Masaru Ito
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan.
| | - Asako Furukohri
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Kenichiro Matsuzaki
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan
- Department of Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara, 631-8505, Japan
| | - Yurika Fujita
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Atsushi Toyoda
- Advanced Genomics Center, National Institute of Genetics, Mishima, Shizuoka, 411-8540, Japan
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan.
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Arimura D, Shinohara A, Katsumi S, Obata S, Kanai T, Saito M. Postoperative Spinal Subdural Extra-arachnoid Hygroma Because of Trauma: Resolution with Lumbar Puncture: A Case Report. JBJS Case Connect 2023; 13:01709767-202312000-00037. [PMID: 38048405 DOI: 10.2106/jbjs.cc.23.00388] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
CASE A 73-year-old woman, after spinal surgery, presented with symptomatic spinal subdural extra-arachnoid hygroma (SSEH) because of a fall on the third postoperative day. The hygroma was diagnosed by magnetic resonance imaging (MRI). Lumbar puncture was performed under local anesthesia, after which the leg pain disappeared immediately. MRI obtained immediately after puncture and 1 week later confirmed disappearance of the hygroma. CONCLUSION Although dural transection is mentioned in most of the reports on treatment of symptomatic postoperative SSEH, we were able to treat this entity by epidural puncture. In the absence of paraplegia or cystorectal disturbance, puncture can be an effective and minimally invasive treatment option.
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Affiliation(s)
- Daigo Arimura
- Department of Orthopedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
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11
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Katsumi S, Shinohara A, Arimura D, Obata S, Ikegami T, Saito M. Paradoxical Response after MISt for Spinal Tuberculosis Worsened Neurologic Symptoms: A Case Report. Spine Surg Relat Res 2023; 7:458-460. [PMID: 37841034 PMCID: PMC10569806 DOI: 10.22603/ssrr.2023-0003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 03/06/2023] [Indexed: 10/17/2023] Open
Affiliation(s)
- Shunsuke Katsumi
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Akira Shinohara
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Daigo Arimura
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Shintaro Obata
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Taku Ikegami
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Mitsuru Saito
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
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12
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Sato T, Shinohara A. Characterizing interaction between the juxtamembrane region of the single transmembrane protein and membrane using chemically synthesized peptides. STAR Protoc 2023; 4:102454. [PMID: 37515758 PMCID: PMC10400950 DOI: 10.1016/j.xpro.2023.102454] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/03/2023] [Accepted: 06/21/2023] [Indexed: 07/31/2023] Open
Abstract
In membrane proteins, a transmembrane region and a juxtamembrane region play important roles in its function. Here, we present a protocol for characterizing membrane protein dynamics between the juxtamembrane region of the single transmembrane protein and acidic membrane. We describe steps for solid-phase peptide synthesis, peptide purification, and labeling. We then detail reconstitution of the transmembrane peptide into lipid bilayers and its evaluation and structural analysis. For complete details on the use and execution of this protocol, please refer to Prasada Rao et al.1.
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Affiliation(s)
- Takeshi Sato
- Kyoto Pharmaceutical University, Kyoto City, Kyoto Prefecture 607-8414, Japan.
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita City, Osaka Prefecture 565-0871, Japan.
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13
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Sawant P, Mwaniki S, Fujita Y, Ito M, Furukohri A, Shinohara A. The role of conserved amino acid residues of Sae3 in Mei5-Sae3 complex for Dmc1 assembly in meiotic recombination. Genes Genet Syst 2023:23-00015. [PMID: 37225456 DOI: 10.1266/ggs.23-00015] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
Meiotic recombination between homologous chromosomes is promoted by the collaborative action of two RecA homologs, Rad51 and meiosis-specific Dmc1. The filament assembly of Dmc1 is promoted by meiosis-specific Mei5-Sae3 in budding yeast. Mei5-Sae3 shows sequence similarity to fission yeast Sfr1-Swi5, which stimulates DNA strand exchanges by Rad51 as well as Dmc1. Sae3 and Swi5 share a conserved motif with the amino acid sequence YNEI/LK/RD. In this study, we analyzed the role of the YNEL residues in the Sae3 sequence in meiotic recombination and found that these residues are critical for Sae3 function in Dmc1 assembly. L59 substitution in the Sae3 protein disrupts complex formation with Mei5, while Y56 and N57 substitutions do not. These observations reveal the differential contribution of conserved YNEL residues to Sae3 activities in meiotic recombination.
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Affiliation(s)
| | | | | | - Masaru Ito
- Institute for Protein Research, Osaka University
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14
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Shinohara M, Shinohara A. The Msh5 complex shows homeostatic localization in response to DNA double-strand breaks in yeast meiosis. Front Cell Dev Biol 2023; 11:1170689. [PMID: 37274743 PMCID: PMC10232913 DOI: 10.3389/fcell.2023.1170689] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/09/2023] [Indexed: 06/06/2023] Open
Abstract
Meiotic crossing over is essential for the segregation of homologous chromosomes. The formation and distribution of meiotic crossovers (COs), which are initiated by the formation of double-strand break (DSB), are tightly regulated to ensure at least one CO per bivalent. One type of CO control, CO homeostasis, maintains a consistent level of COs despite fluctuations in DSB numbers. Here, we analyzed the localization of proteins involved in meiotic recombination in budding yeast xrs2 hypomorphic mutants which show different levels of DSBs. The number of cytological foci with recombinases, Rad51 and Dmc1, which mark single-stranded DNAs at DSB sites is proportional to the DSB numbers. Among the pro-CO factor, ZMM/SIC proteins, the focus number of Zip3, Mer3, or Spo22/Zip4, was linearly proportional to reduced DSBs in the xrs2 mutant. In contrast, foci of Msh5, a component of the MutSγ complex, showed a non-linear response to reduced DSBs. We also confirmed the homeostatic response of COs by genetic analysis of meiotic recombination in the xrs2 mutants and found a chromosome-specific homeostatic response of COs. Our study suggests that the homeostatic response of the Msh5 assembly to reduced DSBs was genetically distinct from that of the Zip3 assembly for CO control.
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Affiliation(s)
- Miki Shinohara
- Department of Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Japan
- Agricultural Technology and Innovation Research Institute, Kindai University, Nara, Japan
- Institute for Protein Research, Osaka University, Osaka, Japan
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Osaka, Japan
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15
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Shinohara A, Shinmori H. Singlet Oxygen Generation Driven by Sulfide Ligand Exchange on Porphyrin-Gold Nanoparticle Conjugates. Int J Mol Sci 2023; 24:ijms24087600. [PMID: 37108763 PMCID: PMC10146049 DOI: 10.3390/ijms24087600] [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: 03/28/2023] [Revised: 04/13/2023] [Accepted: 04/18/2023] [Indexed: 04/29/2023] Open
Abstract
Here, we report a switching method of singlet oxygen (1O2) generation based on the adsorption/desorption of porphyrins to gold nanoparticles driven by sulfide (thiol or disulfide) compounds. The generation of 1O2 by photosensitization is effectively suppressed by the gold nanoparticles and can be restored by a sulfide ligand exchange reaction. The on/off ratio of 1O2 quantum yield (ΦΔ) reached 7.4. By examining various incoming sulfide compounds, it was found that the ligand exchange reaction on the gold nanoparticle surface could be thermodynamically or kinetically controlled. The remaining gold nanoparticles in the system still suppress the generation of 1O2, which can be precipitated out simultaneously with porphyrin desorption by the proper polarity choice of the incoming sulfide to restore the 1O2 generation.
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Affiliation(s)
- Akira Shinohara
- Polymer Chemistry Group, Sagami Chemical Research Institute, Yokohama 252-1193, Japan
- Department of Biotechnology, Faculty of Life and Environmental Science, Graduate Faculty of Interdisciplinary Research, University of Yamanashi, Yamanashi 400-8510, Japan
| | - Hideyuki Shinmori
- Department of Biotechnology, Faculty of Life and Environmental Science, Graduate Faculty of Interdisciplinary Research, University of Yamanashi, Yamanashi 400-8510, Japan
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16
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Gioia M, Payero L, Salim S, Fajish V. G, Farnaz AF, Pannafino G, Chen JJ, Ajith VP, Momoh S, Scotland M, Raghavan V, Manhart CM, Shinohara A, Nishant KT, Alani E. Exo1 protects DNA nicks from ligation to promote crossover formation during meiosis. PLoS Biol 2023; 21:e3002085. [PMID: 37079643 PMCID: PMC10153752 DOI: 10.1371/journal.pbio.3002085] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 05/02/2023] [Accepted: 03/17/2023] [Indexed: 04/21/2023] Open
Abstract
In most sexually reproducing organisms crossing over between chromosome homologs during meiosis is essential to produce haploid gametes. Most crossovers that form in meiosis in budding yeast result from the biased resolution of double Holliday junction (dHJ) intermediates. This dHJ resolution step involves the actions of Rad2/XPG family nuclease Exo1 and the Mlh1-Mlh3 mismatch repair endonuclease. Here, we provide genetic evidence in baker's yeast that Exo1 promotes meiotic crossing over by protecting DNA nicks from ligation. We found that structural elements in Exo1 that interact with DNA, such as those required for the bending of DNA during nick/flap recognition, are critical for its role in crossing over. Consistent with these observations, meiotic expression of the Rad2/XPG family member Rad27 partially rescued the crossover defect in exo1 null mutants, and meiotic overexpression of Cdc9 ligase reduced the crossover levels of exo1 DNA-binding mutants to levels that approached the exo1 null. In addition, our work identified a role for Exo1 in crossover interference. Together, these studies provide experimental evidence for Exo1-protected nicks being critical for the formation of meiotic crossovers and their distribution.
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Affiliation(s)
- Michael Gioia
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America
| | - Lisette Payero
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America
| | - Sagar Salim
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum, India
| | - Ghanim Fajish V.
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Amamah F. Farnaz
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum, India
| | - Gianno Pannafino
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America
| | - Jun Jie Chen
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America
| | - V. P. Ajith
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum, India
| | - Sherikat Momoh
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America
| | - Michelle Scotland
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America
| | - Vandana Raghavan
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America
| | - Carol M. Manhart
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - K. T. Nishant
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum, India
- Center for High-Performance Computing, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum, India
| | - Eric Alani
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America
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17
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Abstract
Meiocytes organize higher-order chromosome structures comprising arrays of chromatin loops organized at their bases by linear axes. As meiotic prophase progresses, the axes of homologous chromosomes align and synapse along their lengths to form ladder-like structures called synaptonemal complexes (SCs). The entire process of meiotic recombination, from initiation via programmed DNA double-strand breaks (DSBs) to completion of DSB repair with crossover or non-crossover outcomes, occurs in the context of chromosome axes and SCs. These meiosis-specific chromosome structures provide specialized environments for the regulation of DSB formation and crossing over. In this review, we summarize insights into the importance of chromosome architecture in the regulation of meiotic recombination, focusing on cohesin-mediated axis formation, DSB regulation via tethered loop-axis complexes, inter-homolog template bias facilitated by axial proteins, and crossover regulation in the context of the SCs. We also discuss emerging evidence that the SUMO and the ubiquitin-proteasome system function in the organization of chromosome structure and regulation of meiotic recombination.
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Affiliation(s)
- Masaru Ito
- *Correspondence: Masaru Ito, ; Akira Shinohara,
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18
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Arimura D, Shinohara A, Katsumi S, Obata S, Ikegami T, Saito M. Transsacral Canal Plasty for Decompression of Lumbar Spinal Stenosis in a Patient With Epidural Lipomatosis: A Case Report. JBJS Case Connect 2022; 12:01709767-202212000-00045. [PMID: 36656263 DOI: 10.2106/jbjs.cc.22.00494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 10/20/2022] [Indexed: 01/20/2023]
Abstract
CASE A 58-year-old man presented with lumbar spinal stenosis due to epidural lipomatosis. He underwent transsacral canal plasty (TSCP), in a manner similar to epidural adhesiolysis, which can be performed under local anesthesia. His leg pain improved dramatically in the year after surgery. Furthermore, magnetic resonance images during this time show neural decompression by reduction of the amount of epidural fat. CONCLUSION TSCP was found not only to relieve pain but also to achieve neural decompression in this patient with spinal canal stenosis caused by lumbar epidural lipomatosis. This is the first report to demonstrate the usefulness of TSCP for spinal epidural lipomatosis.
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Affiliation(s)
- Daigo Arimura
- Department of Orthopedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
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19
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Ishii K, Watanabe G, Tomita T, Nikaido T, Hikata T, Shinohara A, Nakano M, Saito T, Nakanishi K, Morimoto T, Isogai N, Funao H, Tanaka M, Kotani Y, Arizono T, Hoshino M, Sato K. Minimally Invasive Spinal Treatment (MIST)—A New Concept in the Treatment of Spinal Diseases: A Narrative Review. Medicina (B Aires) 2022; 58:medicina58081123. [PMID: 36013590 PMCID: PMC9413482 DOI: 10.3390/medicina58081123] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/05/2022] [Accepted: 08/16/2022] [Indexed: 11/23/2022] Open
Abstract
In the past two decades, minimally invasive spine surgery (MISS) techniques have been developed for spinal surgery. Historically, minimizing invasiveness in decompression surgery was initially reported as a MISS technique. In recent years, MISS techniques have also been applied for spinal stabilization techniques, which were defined as minimally invasive spine stabilization (MISt), including percutaneous pedicle screws (PPS) fixation, lateral lumbar interbody fusion, balloon kyphoplasty, percutaneous vertebroplasty, cortical bone trajectory, and cervical total disc replacement. These MISS techniques typically provide many advantages such as preservation of paraspinal musculature, less blood loss, a shorter operative time, less postoperative pain, and a lower infection rate as well as being more cost-effective compared to traditional open techniques. However, even MISS techniques are associated with several limitations including technical difficulty, training opportunities, surgical cost, equipment cost, and radiation exposure. These downsides of surgical treatments make conservative treatments more feasible option. In the future, medicine must become “minimally invasive” in the broadest sense—for all patients, conventional surgeries, medical personnel, hospital management, nursing care, and the medical economy. As a new framework for the treatment of spinal diseases, the concept of minimally invasive spinal treatment (MIST) has been proposed.
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Affiliation(s)
- Ken Ishii
- Department of Orthopaedic Surgery, School of Medicine, International University of Health and Welfare (IUHW), Chiba 286-8686, Japan
- Spine and Spinal Cord Center, Department of Orthopaedic Surgery, International University of Health and Welfare (IUHW) Mita Hospital, Tokyo 108-8329, Japan
- Department of Orthopaedic Surgery, International University of Health and Welfare (IUHW) Narita Hospital, Chiba 286-8520, Japan
| | | | - Takashi Tomita
- Department of Orthopaedic Surgery, Aomori Prefectural Central Hospital, Aomori 030-8553, Japan
| | - Takuya Nikaido
- Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Tomohiro Hikata
- Department of Orthopaedic Surgery, Kitasato University Kitasato Institute Hospital, Tokyo 108-8642, Japan
| | - Akira Shinohara
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo 105-8471, Japan
| | - Masato Nakano
- Department of Orthopaedic Surgery, Takaoka City Hospital, Takaoka 933-8550, Japan
| | - Takanori Saito
- Department of Orthopaedic Surgery, Kansai Medical University, Osaka 573-1191, Japan
| | - Kazuo Nakanishi
- Department of Orthopaedics, Traumatology and Spine Surgery, Kawasaki Medical School, Okayama 701-0192, Japan
| | - Tadatsugu Morimoto
- Department of Orthopaedic Surgery, Saga University School of Medicine, Saga 849-8501, Japan
| | - Norihiro Isogai
- Department of Orthopaedic Surgery, School of Medicine, International University of Health and Welfare (IUHW), Chiba 286-8686, Japan
- Spine and Spinal Cord Center, Department of Orthopaedic Surgery, International University of Health and Welfare (IUHW) Mita Hospital, Tokyo 108-8329, Japan
| | - Haruki Funao
- Department of Orthopaedic Surgery, School of Medicine, International University of Health and Welfare (IUHW), Chiba 286-8686, Japan
- Spine and Spinal Cord Center, Department of Orthopaedic Surgery, International University of Health and Welfare (IUHW) Mita Hospital, Tokyo 108-8329, Japan
- Department of Orthopaedic Surgery, International University of Health and Welfare (IUHW) Narita Hospital, Chiba 286-8520, Japan
| | - Masato Tanaka
- Department of Orthopaedic Surgery, Okayama Rosai Hospital, Okayama 702-8055, Japan
| | - Yoshihisa Kotani
- Department of Orthopaedic Surgery, Kansai Medical University Medical Center, Osaka 573-1010, Japan
| | - Takeshi Arizono
- Department of Orthopaedic Surgery, Kyushu Central Hospital, Fukuoka 815-0032, Japan
| | - Masahiro Hoshino
- Department of Orthopaedic Surgery, Sonoda Medical Institute Tokyo Spine Center, Tokyo 121-0807, Japan
| | - Koji Sato
- Department of Orthopaedic Surgery, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya 466-8650, Japan
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20
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Ushiku C, Akiyama S, Ikegami T, Inoue T, Shinohara A, Kobayashi S, Kajiwara T, Arimura D, Katsumi S, Obata S, Soshi S, Saito M. Clinical study of preoperative skeletal muscle mass as a predictor of physical performance recovery following palliative surgery for spinal metastases. J Orthop Sci 2022:S0949-2658(22)00170-1. [PMID: 35811255 DOI: 10.1016/j.jos.2022.06.006] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/05/2022] [Accepted: 06/17/2022] [Indexed: 10/17/2022]
Abstract
BACKGROUND Surgical treatment of spinal metastases has been associated with high morbidity and mortality in patients with sarcopenia based on low skeletal muscle mass. We assessed physical performance using the Eastern Cooperative Oncology Group performance status scale and the Barthel Index on the 30th day after palliative surgery for spinal metastases and investigated the effectiveness of surgery according to sarcopenia assessed by skeletal muscle mass. METHODS We retrospectively analyzed 78 consecutive patients with thoracic and lumbar spinal metastases who underwent palliative surgery. The value of the area of the psoas major muscle at the L3 level normalized by the vertebral area was divided into first, middle, and third tertiles. Clinical variables were compared by tertile. Variables affecting the 30-day good performance status were investigated with univariate and multivariate analyses. RESULTS The 30-day morbidity rates were 50%, 38.5%, and 15.4% by tertile. The 30-day mortality rate was 2%; all were in the first tertile. Good preoperative performance status scores were seen in 15.4% of first and 50% of third tertile patients. Postoperatively, the performance status improved in all groups, with 30.8%, 65.4%, and 92.3% by tertile. Multivariate regression analysis revealed that a good preoperative performance status (OR: 15.50, 95% CI: 1.610-149.00, P < 0.05) and the value of the area of the psoas major muscle at the L3 level normalized by the vertebral area not in the first tertile (OR: 0.22, 95% CI: 0.06-0.82, P < 0.05) were significant predictors of a good postoperative 30-day performance status. CONCLUSIONS A good preoperative performance status and exclusion from the first tertile were clinical factors predicting a good postoperative 30-day performance status. In patients with large psoas muscle mass (third tertile), a good 30-day performance status can be expected after surgery, suggesting that surgery in this population should be pursued aggressively.
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Affiliation(s)
- Chikara Ushiku
- Department of Orthopaedic Surgery, The Jikei University Kashiwa Hospital, Kashiwashita 163-1, Kashiwa, Chiba, 2778567, Japan; Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan.
| | - Shoshi Akiyama
- Department of Orthopaedic Surgery, The Jikei University Kashiwa Hospital, Kashiwashita 163-1, Kashiwa, Chiba, 2778567, Japan; Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Taku Ikegami
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Takeshi Inoue
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Akira Shinohara
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Shunsuke Kobayashi
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Takayoshi Kajiwara
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Daigo Arimura
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Shunsuke Katsumi
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Shintaro Obata
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Shigeru Soshi
- Department of Orthopaedic Surgery, The Jikei University Kashiwa Hospital, Kashiwashita 163-1, Kashiwa, Chiba, 2778567, Japan; Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Mitsuru Saito
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
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21
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Arimura D, Shinohara A, Katsumi S, Obata S, Ikegami T, Saito M. Retroperitoneal Hematoma Due to Drainage Tube Insertion in Extreme Lateral Interbody Fusion: A Case Report. JBJS Case Connect 2022; 12:01709767-202209000-00014. [PMID: 35852166 DOI: 10.2106/jbjs.cc.22.00051] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
CASE A 73-year-old woman presented with degenerative kyphoscoliosis. Radiographs revealed sagittal and coronal imbalance with lumbar spinal stenosis. Extreme lateral interbody fusion (XLIF) was performed in the first stage of 2-stage surgery, and a closed-suction drainage tube was placed in the retroperitoneal cavity. Postoperatively, there was massive bleeding through the tube. Contrast-enhanced computed tomography revealed lumbar artery injury, which required emergency arterial embolization. CONCLUSION Placing a drainage tube in the retroperitoneal cavity during XLIF surgery can help detect complications such as intestinal and ureteral injuries, the lumbar artery within the lumbar muscle can be injured during drain placement.
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Affiliation(s)
- Daigo Arimura
- Department of Orthopedic Surgery, the Jikei University School of Medicine, Tokyo, Japan
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22
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Katayama S, Ushiku C, Ikegami T, Inoue T, Shinohara A, Kajiwara T, Arimura D, Akiyama S, Katsumi S, Obata S, Soshi S, Saito M. Intraspinal Epidermoid Cyst With Calcification: A Case Report. Spine Surg Relat Res 2022; 6:569-572. [DOI: 10.22603/ssrr.2021-0219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 01/18/2022] [Indexed: 11/05/2022] Open
Affiliation(s)
- Shota Katayama
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
| | - Chikara Ushiku
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
| | - Taku Ikegami
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
| | - Takeshi Inoue
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
| | - Akira Shinohara
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
| | - Takayoshi Kajiwara
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
| | - Daigo Arimura
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
| | - Shoshi Akiyama
- Department of Orthopaedic Surgery, The Jikei University Kashiwa Hospital
| | - Shunsuke Katsumi
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
| | - Shintaro Obata
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
| | - Shigeru Soshi
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
| | - Mitsuru Saito
- Department of Orthopaedic Surgery, The Jikei University School of Medicine
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23
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Affiliation(s)
- Wei Li
- Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China.,State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences (CAS), Beijing, China
| | - Liangran Zhang
- Advanced Medical Research Institute, Shandong University, Jinan, China
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Japan
| | - Scott Keeney
- Molecular Biology Program, Memorial Sloan Kettering Cancer Center, Howard Hughes Medical Institute, New York, NY, United States
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24
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Shinohara A, Shao G, Nakanishi T, Shinmori H. Porphyrin Photoabsorption and Fluorescence Variation with Adsorptive Loading on Gold Nanoparticles. Front Chem 2021; 9:777041. [PMID: 34888295 PMCID: PMC8650619 DOI: 10.3389/fchem.2021.777041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 10/25/2021] [Indexed: 11/21/2022] Open
Abstract
Here, we report the photophysical structure–property relationship of porphyrins adsorbed on gold nanoparticles. The number of porphyrin–alkanethiolate adsorbates per particle was adjusted by a post-synthetic thiol/thiolate exchange reaction on 1-dodecanethiolate–protected gold nanoparticles. Even with a low loading level of adsorbates (<10% of all thiolate sites on gold nanoparticles), the shoulder absorption at the Soret band was intensified, indicating the formation of aggregates of porphyrin adsorbates on the nanoparticles. Steady-state fluorescence quantum yields could be adjusted by the bulkiness of substituents at the meso-positions of the porphyrin or the methylene linker chain length, regardless of the porphyrin loading level and the nanoparticle diameter.
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Affiliation(s)
- Akira Shinohara
- School of Chemistry, Sun Yat-sen University, Guangzhou, China.,Faculty of Life and Environmental Science, Graduate Faculty of Interdisciplinary Research, Department of Biotechnology, University of Yamanashi, Kofu, Japan.,International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Japan
| | - Guang Shao
- School of Chemistry, Sun Yat-sen University, Guangzhou, China
| | - Takashi Nakanishi
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Japan
| | - Hideyuki Shinmori
- Faculty of Life and Environmental Science, Graduate Faculty of Interdisciplinary Research, Department of Biotechnology, University of Yamanashi, Kofu, Japan
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25
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Nandanan KG, Salim S, Pankajam AV, Shinohara M, Lin G, Chakraborty P, Farnaz A, Steinmetz LM, Shinohara A, Nishant KT. Regulation of Msh4-Msh5 association with meiotic chromosomes in budding yeast. Genetics 2021; 219:6317832. [PMID: 34849874 DOI: 10.1093/genetics/iyab102] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 06/08/2021] [Indexed: 01/06/2023] Open
Abstract
In the baker's yeast Saccharomyces cerevisiae, most of the meiotic crossovers are generated through a pathway involving the highly conserved mismatch repair related Msh4-Msh5 complex. To understand the role of Msh4-Msh5 in meiotic crossing over, we determined its genome wide in vivo binding sites in meiotic cells. We show that Msh5 specifically associates with DSB hotspots, chromosome axes, and centromeres on chromosomes. A basal level of Msh5 association with these chromosomal features is observed even in the absence of DSB formation (spo11Δ mutant) at the early stages of meiosis. But efficient binding to DSB hotspots and chromosome axes requires DSB formation and resection and is enhanced by double Holliday junction structures. Msh5 binding is also correlated to DSB frequency and enhanced on small chromosomes with higher DSB and crossover density. The axis protein Red1 is required for Msh5 association with the chromosome axes and DSB hotspots but not centromeres. Although binding sites of Msh5 and other pro-crossover factors like Zip3 show extensive overlap, Msh5 associates with centromeres independent of Zip3. These results on Msh5 localization in wild type and meiotic mutants have implications for how Msh4-Msh5 works with other pro-crossover factors to ensure crossover formation.
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Affiliation(s)
- Krishnaprasad G Nandanan
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695016, India
| | - Sagar Salim
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695016, India
| | - Ajith V Pankajam
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695016, India
| | - Miki Shinohara
- Graduate School of Agriculture, Kindai University, Nara 631-8505, Japan
| | - Gen Lin
- Genome Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
| | - Parijat Chakraborty
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695016, India
| | - Amamah Farnaz
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695016, India
| | - Lars M Steinmetz
- Genome Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany.,Department of Genetics, Stanford University, Stanford, CA 94305, USA.,Stanford Genome Technology Center, Palo Alto, CA 94304, USA
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Koodali T Nishant
- School of Biology, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695016, India.,Graduate School of Agriculture, Kindai University, Nara 631-8505, Japan
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26
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Prasada Rao HB, Sato T, Challa K, Fujita Y, Shinohara M, Shinohara A. Phosphorylation of luminal region of the SUN-domain protein Mps3 promotes nuclear envelope localization during meiosis. eLife 2021; 10:63119. [PMID: 34586062 PMCID: PMC8570693 DOI: 10.7554/elife.63119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 09/26/2021] [Indexed: 12/31/2022] Open
Abstract
During meiosis, protein ensembles in the nuclear envelope (NE) containing SUN- and KASH-domain proteins, called linker nucleocytoskeleton and cytoskeleton (LINC) complex, promote the chromosome motion. Yeast SUN-domain protein, Mps3, forms multiple meiosis-specific ensembles on NE, which show dynamic localisation for chromosome motion; however, the mechanism by which these Mps3 ensembles are formed during meiosis remains largely unknown. Here, we showed that the cyclin-dependent protein kinase (CDK) and Dbf4-dependent Cdc7 protein kinase (DDK) regulate meiosis-specific dynamics of Mps3 on NE, particularly by mediating the resolution of Mps3 clusters and telomere clustering. We also found that the luminal region of Mps3 juxtaposed to the inner nuclear membrane is required for meiosis-specific localisation of Mps3 on NE. Negative charges introduced by meiosis-specific phosphorylation in the luminal region of Mps3 alter its interaction with negatively charged lipids by electric repulsion in reconstituted liposomes. Phospho-mimetic substitution in the luminal region suppresses the localisation of Mps3 via the inactivation of CDK or DDK. Our study revealed multi-layered phosphorylation-dependent regulation of the localisation of Mps3 on NE for meiotic chromosome motion and NE remodelling.
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Affiliation(s)
| | | | - Kiran Challa
- Institute for Protein Research, Osaka University, Suita, Japan
| | - Yurika Fujita
- Institute for Protein Research, Osaka University, Suita, Japan
| | - Miki Shinohara
- Institute for Protein Research, Osaka University, Suita, Japan
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Japan
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27
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Takagi T, Osumi M, Shinohara A. Ultrastructural analysis in yeast reveals a meiosis-specific actin-containing nuclear bundle. Commun Biol 2021; 4:1009. [PMID: 34433891 PMCID: PMC8387383 DOI: 10.1038/s42003-021-02545-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 08/12/2021] [Indexed: 11/09/2022] Open
Abstract
Actin polymerises to form filaments/cables for motility, transport, and the structural framework in a cell. Recent studies show that actin polymers are present not only in the cytoplasm but also in the nuclei of vertebrate cells. Here, we show, by electron microscopic observation with rapid freezing and high-pressure freezing, a unique bundled structure containing actin in the nuclei of budding yeast cells undergoing meiosis. The nuclear bundle during meiosis consists of multiple filaments with a rectangular lattice arrangement, often showing a feather-like appearance. The bundle was immunolabelled with an anti-actin antibody and was sensitive to an actin-depolymerising drug. Similar to cytoplasmic bundles, nuclear bundles are rarely seen in premeiotic cells and spores and are induced during meiotic prophase-I. The formation of the nuclear bundle is independent of DNA double-stranded breaks. We speculate that nuclear bundles containing actin play a role in nuclear events during meiotic prophase I.
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Affiliation(s)
- Tomoko Takagi
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan.,Laboratory of Electron Microscopy, Japan Women's University, Bunkyo, Tokyo, Japan.,Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, Bunkyo, Tokyo, Japan
| | - Masako Osumi
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, Bunkyo, Tokyo, Japan.,NPO: Integrated Imaging Research Support, Chiyoda, Tokyo, Japan
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan.
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28
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Lee MS, Higashide MT, Choi H, Li K, Hong S, Lee K, Shinohara A, Shinohara M, Kim KP. The synaptonemal complex central region modulates crossover pathways and feedback control of meiotic double-strand break formation. Nucleic Acids Res 2021; 49:7537-7553. [PMID: 34197600 PMCID: PMC8287913 DOI: 10.1093/nar/gkab566] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 06/06/2021] [Accepted: 06/16/2021] [Indexed: 12/27/2022] Open
Abstract
The synaptonemal complex (SC) is a proteinaceous structure that mediates homolog engagement and genetic recombination during meiosis. In budding yeast, Zip-Mer-Msh (ZMM) proteins promote crossover (CO) formation and initiate SC formation. During SC elongation, the SUMOylated SC component Ecm11 and the Ecm11-interacting protein Gmc2 facilitate the polymerization of Zip1, an SC central region component. Through physical recombination, cytological, and genetic analyses, we found that ecm11 and gmc2 mutants exhibit chromosome-specific defects in meiotic recombination. CO frequencies on a short chromosome (chromosome III) were reduced, whereas CO and non-crossover frequencies on a long chromosome (chromosome VII) were elevated. Further, in ecm11 and gmc2 mutants, more double-strand breaks (DSBs) were formed on a long chromosome during late prophase I, implying that the Ecm11–Gmc2 (EG) complex is involved in the homeostatic regulation of DSB formation. The EG complex may participate in joint molecule (JM) processing and/or double-Holliday junction resolution for ZMM-dependent CO-designated recombination. Absence of the EG complex ameliorated the JM-processing defect in zmm mutants, suggesting a role for the EG complex in suppressing ZMM-independent recombination. Our results suggest that the SC central region functions as a compartment for sequestering recombination-associated proteins to regulate meiosis specificity during recombination.
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Affiliation(s)
- Min-Su Lee
- Department of Life Science, Chung-Ang University, Seoul 06974, South Korea
| | - Mika T Higashide
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Hyungseok Choi
- Department of Life Science, Chung-Ang University, Seoul 06974, South Korea
| | - Ke Li
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan.,Graduate School of Agriculture, Kindai University, Nara 631-8505, Japan
| | - Soogil Hong
- Department of Life Science, Chung-Ang University, Seoul 06974, South Korea
| | - Kangseok Lee
- Department of Life Science, Chung-Ang University, Seoul 06974, South Korea
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan
| | - Miki Shinohara
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan.,Graduate School of Agriculture, Kindai University, Nara 631-8505, Japan.,Agricultural Technology and Innovation Research Institute, Kindai University, Nara 631-8505, Japan
| | - Keun P Kim
- Department of Life Science, Chung-Ang University, Seoul 06974, South Korea
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29
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Suetake I, Nakazawa S, Sato K, Mutoh R, Mishima Y, Kawakami T, Takei T, Watanabe M, Sakai N, Fujiwara T, Takui T, Miyata M, Shinohara A, Hojo H, Arata T. Structural dynamics of the chromo-shadow domain and chromodomain of HP1 bound to histone H3K9 methylated peptide, as measured by site-directed spin-labeling EPR spectroscopy. Biochem Biophys Res Commun 2021; 567:42-48. [PMID: 34139556 DOI: 10.1016/j.bbrc.2021.06.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 06/03/2021] [Indexed: 10/21/2022]
Abstract
The structural dynamics of the chromo-shadow domain (CSD) and chromodomain (CD) of human HP1 proteins essential for heterochromatin formation were investigated at the nanosecond and nanometer scales by site-directed spin labeling electron paramagnetic resonance and pulsed double resonance spectroscopy. Distance measurements showed that the spin-labeled CSD of human HP1α and HP1γ tightly dimerizes. Unlike CD-CD interaction observed in fission yeast HP1 in an inactivated state (Canzio et al., 2013), the two CDs of HP1α and HP1γ were spatially separated from each other, dynamically mobile, and ready for a Brownian search for H3K9-tri-methyl(me3) on histones. Complex formation of the CD with H3K9me3 slowed dynamics of the domain due to a decreased diffusion constant. CSD mobility was significantly (∼1.3-fold) lower in full-length HP1α than in HP1γ, suggesting that the immobilized conformation of human HP1α shows an auto-inactivated state. Differential properties of HP1α and HP1γ to form the inactive conformation could be relevant to its physiological role in the heterochromatin formation in a cell.
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Affiliation(s)
- Isao Suetake
- Institute for Protein Research, Osaka University, Osaka, 565-0871, Japan; Center for Twin Research, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan; Department of Nutritional Sciences, Graduate School of Nutritional Sciences, Nakamura Gakuen University, Fukuoka, 814-0198, Japan.
| | - Shigeaki Nakazawa
- Department of Chemistry and Molecular Materials Sciences, Graduate School of Science, Osaka City University, Osaka, 558-8585, Japan
| | - Kazunobu Sato
- Department of Chemistry and Molecular Materials Sciences, Graduate School of Science, Osaka City University, Osaka, 558-8585, Japan
| | - Risa Mutoh
- Department of Applied Physics, Faculty of Science, Fukuoka University, Fukuoka, 814-0180, Japan
| | - Yuichi Mishima
- Institute for Protein Research, Osaka University, Osaka, 565-0871, Japan
| | - Toru Kawakami
- Institute for Protein Research, Osaka University, Osaka, 565-0871, Japan
| | - Toshiki Takei
- Institute for Protein Research, Osaka University, Osaka, 565-0871, Japan
| | - Mikio Watanabe
- Center for Twin Research, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Norio Sakai
- Center for Twin Research, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | | | - Takeji Takui
- Department of Chemistry and Molecular Materials Sciences, Graduate School of Science, Osaka City University, Osaka, 558-8585, Japan
| | - Makoto Miyata
- Department of Biology, Graduate School of Science, Osaka City University, Osaka, 558-8585, Japan
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Osaka, 565-0871, Japan
| | - Hironobu Hojo
- Institute for Protein Research, Osaka University, Osaka, 565-0871, Japan
| | - Toshiaki Arata
- Institute for Protein Research, Osaka University, Osaka, 565-0871, Japan; Department of Biology, Graduate School of Science, Osaka City University, Osaka, 558-8585, Japan.
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30
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Yan ZC, Li Y, Guo Z, Shinohara A, Nakanishi T, Chen G, Pan C, Stadler FJ. Rheology of Conjugated Polymers with Bulky and Flexible Side Chains. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhi-Chao Yan
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Yanan Li
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Zhenfeng Guo
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Akira Shinohara
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan
| | - Takashi Nakanishi
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan
| | - Guangming Chen
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Chengjun Pan
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Florian J. Stadler
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
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31
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Usui T, Shinohara A. Rad9, a 53BP1 Ortholog of Budding Yeast, Is Insensitive to Spo11-Induced Double-Strand Breaks During Meiosis. Front Cell Dev Biol 2021; 9:635383. [PMID: 33842461 PMCID: PMC8027355 DOI: 10.3389/fcell.2021.635383] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 02/25/2021] [Indexed: 12/04/2022] Open
Abstract
Exogenous double-strand breaks (DSBs) induce a DNA damage response during mitosis as well as meiosis. The DNA damage response is mediated by a cascade involving Mec1/Tel1 (ATR/ATM) and Rad53 (Chk2) kinases. Meiotic cells are programmed to form DSBs for the initiation of meiotic recombination. In budding yeast, Spo11-mediated meiotic DSBs activate Mec1/Tel1, but not Rad53; however, the mechanism underlying the insensitivity of Rad53 to meiotic DSBs remains largely unknown. In this study, we found that meiotic cells activate Rad53 in response to exogenous DSBs and that this activation is dependent on an epigenetic marker, Dot1-dependent histone H3K79 methylation, which becomes a scaffold of an Rad53 mediator, Rad9, an ortholog of 53BP1. In contrast, Rad9 is insensitive to meiotic programmed DSBs. This insensitiveness of Rad9 derives from its inability to bind to the DSBs. Indeed, artificial tethering of Rad9 to the meiotic DSBs activated Rad53. The artificial activation of Rad53 kinase in meiosis decreases the repair of meiotic DSBs. These results suggest that the suppression of Rad53 activation is a key event in initiating a meiotic program that repairs programmed DSBs.
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Affiliation(s)
- Takehiko Usui
- Institute for Protein Research, Osaka University, Suita, Japan
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Japan
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32
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Ushiku C, Soshi S, Inoue T, Shinohara A, Shinohara K, Ohkawa A, Marumo K. The position of the vertebral artery V1 segment relative to the C7 vertebra. J Orthop Sci 2021; 26:203-206. [PMID: 32360078 DOI: 10.1016/j.jos.2020.03.020] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 02/25/2020] [Accepted: 03/10/2020] [Indexed: 11/19/2022]
Abstract
BACKGROUND The vertebral artery (VA) usually enters the transverse foramen at the C6 level. Thus, surgeons prefer to insert pedicle screws (PSs) at C7, but this does not eliminate the risk of VA injury. We aimed to clarify anatomical features of the VA V1 segment at the C7 pedicle level, based on computed tomographic angiography (CTA) of 81 consecutive patients. METHODS We examined the course of the VA V1 segment on axial CTA images. VA position was classified according to its alignment with the anterior (A), middle (M), or posterior (P) third of the C7 vertebral body at the pedicle level. We also assessed the prevalence of hypoplastic VA (HVA). We measured the distance (VED) from the optimum C7 PS entry point (Ep) to the center of the VA. We also measured the angles formed by the vertebral midline and a line from the inner edge of the VA to the Ep (the VEA), and by the vertebral midline and a line from the inner edge of the pedicle to the Ep (the PEA). RESULTS The variant location of the VA to the C7 vertebra was A in 13 courses (8.1%), M in 123 (76.9%), and P in 20 (12.5%). HVA was present in the contralateral side in 7 of 20 courses (35%) in the P group, and in 8 of 127 courses (6.3%) in the M group (p < 0.05). The mean VED was 20.2 mm, the mean VEA 6.9°, and the mean PEA angle was 36.3°. CONCLUSION The 20 VA courses in the P group (12.5% of the total VA courses) were relatively close to the C7 Ep. HVA was present contralateral to the VA in 7 of 20 courses in the P group. CTA should be considered before proceeding with, even if, C7 PS instrumentation, to avoid unexpected pitfall.
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Affiliation(s)
- Chikara Ushiku
- Department of Orthopaedic Surgery, The Jikei University School of Medicine Kashiwa Hospital, Kashiwashita 163-1, Kashiwa, Chiba, 2778567, Japan; Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan.
| | - Shigeru Soshi
- Department of Orthopaedic Surgery, The Jikei University School of Medicine Kashiwa Hospital, Kashiwashita 163-1, Kashiwa, Chiba, 2778567, Japan; Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Takeshi Inoue
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Akira Shinohara
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Kei Shinohara
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Anri Ohkawa
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
| | - Keishi Marumo
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Nishishimbashi 3-19-18, Minatoku, Tokyo, 1058471, Japan
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33
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Zhu Z, Bani Ismail M, Shinohara M, Shinohara A. SCF Cdc4 ubiquitin ligase regulates synaptonemal complex formation during meiosis. Life Sci Alliance 2020; 4:4/2/e202000933. [PMID: 33293336 PMCID: PMC7756916 DOI: 10.26508/lsa.202000933] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/23/2020] [Accepted: 11/24/2020] [Indexed: 12/23/2022] Open
Abstract
During meiosis, homologous chromosomes pair to form the synaptonemal complex (SC). This study showed that SCFCdc4 ubiquitin ligase is required for and works with Pch2 AAA+ ATPase for SC assembly. Homologous chromosomes pair with each other during meiosis, culminating in the formation of the synaptonemal complex (SC), which is coupled with meiotic recombination. In this study, we showed that a meiosis-specific depletion mutant of a cullin (Cdc53) in the SCF (Skp-Cullin-F-box) ubiquitin ligase, which plays a critical role in cell cycle regulation during mitosis, is deficient in SC formation. However, the mutant is proficient in forming crossovers, indicating the uncoupling of meiotic recombination with SC formation in the mutant. Furthermore, the deletion of the PCH2 gene encoding a meiosis-specific AAA+ ATPase suppresses SC-assembly defects induced by CDC53 depletion. On the other hand, the pch2 cdc53 double mutant is defective in meiotic crossover formation, suggesting the assembly of SC with unrepaired DNA double-strand breaks. A temperature-sensitive mutant of CDC4, which encodes an F-box protein of SCF, shows meiotic defects similar to those of the CDC53-depletion mutant. These results suggest that SCFCdc4, probably SCFCdc4-dependent protein ubiquitylation, regulates and collaborates with Pch2 in SC assembly and meiotic recombination.
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Affiliation(s)
- Zhihui Zhu
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | | | - Miki Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
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34
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Woo TT, Chuang CN, Higashide M, Shinohara A, Wang TF. Dual roles of yeast Rad51 N-terminal domain in repairing DNA double-strand breaks. Nucleic Acids Res 2020; 48:8474-8489. [PMID: 32652040 PMCID: PMC7470947 DOI: 10.1093/nar/gkaa587] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 06/24/2020] [Accepted: 07/03/2020] [Indexed: 01/17/2023] Open
Abstract
Highly toxic DNA double-strand breaks (DSBs) readily trigger the DNA damage response (DDR) in cells, which delays cell cycle progression to ensure proper DSB repair. In Saccharomyces cerevisiae, mitotic S phase (20–30 min) is lengthened upon DNA damage. During meiosis, Spo11-induced DSB onset and repair lasts up to 5 h. We report that the NH2-terminal domain (NTD; residues 1–66) of Rad51 has dual functions for repairing DSBs during vegetative growth and meiosis. Firstly, Rad51-NTD exhibits autonomous expression-enhancing activity for high-level production of native Rad51 and when fused to exogenous β-galactosidase in vivo. Secondly, Rad51-NTD is an S/T-Q cluster domain (SCD) harboring three putative Mec1/Tel1 target sites. Mec1/Tel1-dependent phosphorylation antagonizes the proteasomal degradation pathway, increasing the half-life of Rad51 from ∼30 min to ≥180 min. Our results evidence a direct link between homologous recombination and DDR modulated by Rad51 homeostasis.
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Affiliation(s)
- Tai-Ting Woo
- Institute of Molecular Biology, Academia Sinica, Taipei 115, Taiwan
| | - Chi-Ning Chuang
- Institute of Molecular Biology, Academia Sinica, Taipei 115, Taiwan
| | - Mika Higashide
- Laboratory of Genome-Chromosome Functions, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Japan
| | - Akira Shinohara
- Laboratory of Genome-Chromosome Functions, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Japan
| | - Ting-Fang Wang
- Institute of Molecular Biology, Academia Sinica, Taipei 115, Taiwan
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35
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Nouchi R, Aihara H, Arie F, Asashima M, Daida H, Fudano J, Fujiwara Y, Fushiki S, Geller RJ, Hatano K, Homma T, Kimura M, Kuroki T, Miki K, Morita I, Nitta K, Shinohara A, Siomi MC, Yoshida M, Ichikawa I. Toward global standardization of conducting fair investigations of allegations of research misconduct. Account Res 2020; 27:327-346. [DOI: 10.1080/08989621.2020.1747019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Rei Nouchi
- Division of Research Integrity and Ethics, School of Medicine, Shinshu University, Matsumoto, Nagano, Japan
| | - Hiroaki Aihara
- School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
- Director, Association for the Promotion of Research Integrity, Shinjuku-ku, Tokyo, Japan
| | - Fumie Arie
- Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Makoto Asashima
- President, Association for the Promotion of Research Integrity, Shinjuku-ku, Tokyo, Japan
- Strategic Innovation and Research Center, Teikyo University, Itabashi-ku, Tokyo, Japan
| | - Hiroyuki Daida
- Faculty of Health Science, Juntendo University, Bunkyo-ku, Tokyo, Japan
| | - Jun Fudano
- Director, Association for the Promotion of Research Integrity, Shinjuku-ku, Tokyo, Japan
- Tokyo Tech Academy for Leadership, Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan
| | - Yasuhiro Fujiwara
- Chief Executive, Pharmaceuticals and Medical Devices Agency, Chiyoda-ku, Tokyo, Japan
| | - Shinji Fushiki
- The Center for Quality Assurance in Research, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan
| | - Robert J. Geller
- School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Kazuo Hatano
- The Center for Quality Assurance in Research, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan
- Research Regulatory Management, Astellas Pharm. Inc., Tsukuba, Ibaraki, Japan
| | - Toshio Homma
- Visiting Researcher, Association for the Promotion of Research Integrity, Shinjuku-ku, Tokyo, Japan
| | - Minoru Kimura
- Director, Association for the Promotion of Research Integrity, Shinjuku-ku, Tokyo, Japan
- The Institute of Medical, SciencesTokai University, Isehara, Kanagawa, Japan
| | - Toshio Kuroki
- Research Center for Science Systems, Japan Society for the Promotion of Science, Chiyoda-ku, Tokyo
| | - Koichi Miki
- Law School, Keio University, Minato-ku, Tokyo, Japan
| | - Ikuo Morita
- Director, Association for the Promotion of Research Integrity, Shinjuku-ku, Tokyo, Japan
- Trustee, Vice-President, Ochanomizu University, Bunkyo-ku, Japan
| | - Kosaku Nitta
- Department of Nephrology, Tokyo Women’s Medical University, Shinjuku-ku, Tokyo, Japan
| | - Akira Shinohara
- Director, Association for the Promotion of Research Integrity, Shinjuku-ku, Tokyo, Japan
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Mikiko C. Siomi
- School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Masayuki Yoshida
- Bioethics Research Center, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Iekuni Ichikawa
- Division of Research Integrity and Ethics, School of Medicine, Shinshu University, Matsumoto, Nagano, Japan
- Executive Director, Association for the Promotion of Research Integrity, Shinjuku-ku, Japan
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Shinohara A, Pan C, Wang L, Shinmori H. Acid–base controllable singlet oxygen generation in supramolecular porphyrin–gold nanoparticle composites tethered by rotaxane linkers. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s108842461950086x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Mechanically-interlocked photosensitizer–quencher systems based on free-base tetraphenylporphyrin (H2TPP)–gold nanoparticle (AuNP) composites has been designed and synthesized by utilizing a rotaxane architecture comprised of secondary ammonium and crown ether subunit. The H2TPP-substituted 24-crown-8 was able to shuttle along the alkanethiolate axle, triggered by deprotonation/protonation at the ammonium station, altering the H2TPP–AuNP distance and the photoexcitation energy transfer efficiency. Upon switching, quantum yields for photosensitized singlet oxygen (1O[Formula: see text] generation and fluorescence after deprotonation were quenched by 46% and 42%, respectively. External environment-responsive1O2generation based on such a protonation/deprotonation-driven molecular switch is potentially advantageous for a variety of applications including photodynamic therapies.
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Affiliation(s)
- Akira Shinohara
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Boulevard 1066, Nanshan, Shenzhen 518055, China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Nanhai Boulevard 3688, Nanshan, Shenzhen 518060, China
- Department of Biotechnology, Faculty of Life and Environmental Sciences, Graduate Faculty of Interdisciplinary Research, University of Yamanashi, 4-4-37 Takeda, Kofu 400-8510, Japan
| | - Chengjun Pan
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Boulevard 1066, Nanshan, Shenzhen 518055, China
| | - Lei Wang
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Boulevard 1066, Nanshan, Shenzhen 518055, China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Nanhai Boulevard 3688, Nanshan, Shenzhen 518060, China
| | - Hideyuki Shinmori
- Department of Biotechnology, Faculty of Life and Environmental Sciences, Graduate Faculty of Interdisciplinary Research, University of Yamanashi, 4-4-37 Takeda, Kofu 400-8510, Japan
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Tatebe H, Lim CT, Konno H, Shiozaki K, Shinohara A, Uchihashi T, Furukohri A. Rad50 zinc hook functions as a constitutive dimerization module interchangeable with SMC hinge. Nat Commun 2020; 11:370. [PMID: 31953386 PMCID: PMC6969161 DOI: 10.1038/s41467-019-14025-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [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: 05/23/2019] [Accepted: 12/10/2019] [Indexed: 01/11/2023] Open
Abstract
The human Mre11/Rad50 complex is one of the key factors in genome maintenance pathways. Previous nanoscale imaging by atomic force microscopy (AFM) showed that the ring-like structure of the human Mre11/Rad50 complex transiently opens at the zinc hook of Rad50. However, imaging of the human Mre11/Rad50 complex by high-speed AFM shows that the Rad50 coiled-coil arms are consistently bridged by the dimerized hooks while the Mre11/Rad50 ring opens by disconnecting the head domains; resembling other SMC proteins such as cohesin or condensin. These architectural features are conserved in the yeast and bacterial Mre11/Rad50 complexes. Yeast strains harboring the chimeric Mre11/Rad50 complex containing the SMC hinge of bacterial condensin MukB instead of the RAD50 hook properly functions in DNA repair. We propose that the basic role of the Rad50 hook is similar to that of the SMC hinge, which serves as rather stable dimerization interface.
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Affiliation(s)
- Hisashi Tatebe
- Nara Institute of Science and Technology, Graduate School of Biological Sciences, Ikoma, Nara, 630-0192, Japan
| | - Chew Theng Lim
- Nara Institute of Science and Technology, Graduate School of Biological Sciences, Ikoma, Nara, 630-0192, Japan
| | - Hiroki Konno
- WPI Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan
| | - Kazuhiro Shiozaki
- Nara Institute of Science and Technology, Graduate School of Biological Sciences, Ikoma, Nara, 630-0192, Japan
- Department of Microbiology and Molecular Genetics, University of California, Davis, CA, 95616, USA
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Takayuki Uchihashi
- Department of Physics, Nagoya University, Nagoya, 464-8602, Japan.
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, 444-8787, Japan.
| | - Asako Furukohri
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan.
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Takenaka S, Kaito T, Ishii K, Watanabe K, Watanabe K, Shinohara A, Harada T, Nakada F, Majima Y, Matsumoto M. Influence of novel design alteration of pedicle screw on pull-out strength: A finite element study. J Orthop Sci 2020; 25:66-72. [PMID: 30902538 DOI: 10.1016/j.jos.2019.03.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/19/2019] [Accepted: 03/01/2019] [Indexed: 02/09/2023]
Abstract
BACKGROUND We conducted a finite element study to assess the effectiveness of a novel pedicle screw design with two alterations in the distal and proximal portions. METHODS Finite element (FE) models of 24 vertebrae were constructed using computed tomographic data. Pull-out strength of 4 different pedicle screws were compared. The basic screw design was a dual threaded one (PS0), in which the proximal portion is double-threaded (cortical thread), and the distal portion is single-threaded (cancellous thread). In PS1, the inter-thread double-core shape was added to PS0 in the distal portion. Compared to PS0, in PS2, the proximal portion was elongated by 5 mm. PS3 had both PS1 and PS2 features. In addition, the 24 vertebrae were classified into 3 groups based on volumetric bone mineral density (vBMD) of the vertebral body: low <120 mg/cm3, moderate 120-170 mg/cm3, and high >170 mg/cm3. RESULTS The mean pull-out strengths (±SD) were 1137 ± 500 N, 1188 ± 520 N, 1191 ± 512 N, and 1242 ± 538 N for PS0, PS1, PS2, and PS3, respectively. In PS1, there was significant difference in the incremental ratio of pull-out strength to PS0 between the low and high vBMD groups (3.7 ± 1.6% vs. 5.0 ± 1.0%, p = 0.006). In PS2, there was a significant difference in the incremental ratio to PS0 between the moderate and high vBMD groups (7.6 ± 4.0% vs. 3.3 ± 1.8%, p < 0.001). In PS3, there was a significant difference in the incremental ratio to PS0 between the moderate and high vBMD groups (12.1 ± 4.8% vs. 8.5 ± 2.1%, p = 0.003). CONCLUSIONS The two design alterations showed the combined additive effect in the PS3 design. The moderate vBMD group has a balanced bone property to reflect the combined effects of the PS1 and PS2 design alterations.
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Affiliation(s)
- Shota Takenaka
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Suita, Japan
| | - Takashi Kaito
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Suita, Japan.
| | - Ken Ishii
- Department of Orthopedic Surgery, School of Medicine, International University of Health and Welfare, Chiba, Japan
| | - Kota Watanabe
- Department of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Kei Watanabe
- Department of Orthopaedic Surgery, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - Akira Shinohara
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Tomohisa Harada
- Department of Spinal Surgery, Rakuwakai Marutamachi Hospital, Kyoto, Japan
| | | | | | - Morio Matsumoto
- Department of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan
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Kida Y, Saito M, Shinohara A, Soshi S, Marumo K. Non-invasive skin autofluorescence, blood and urine assays of the advanced glycation end product (AGE) pentosidine as an indirect indicator of AGE content in human bone. BMC Musculoskelet Disord 2019; 20:627. [PMID: 31881872 PMCID: PMC6933723 DOI: 10.1186/s12891-019-3011-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 12/17/2019] [Indexed: 12/21/2022] Open
Abstract
Background Bone mineral density (BMD) measurements are widely used to assess fracture risk. However, the finding that some fracture patients had high BMD together with the low contribution of drugs to osteoporosis suggests that bone strength factors other than BMD contribute to bone quality. We evaluated the amount of advanced glycation end products (AGEs) by non-invasive assays of serum and urine as well as by skin autofluorescence to measure the levels of a representative AGE, pentosidine, to investigate whether pentosidine can serve as an indirect indicator of AGEs formation in bone collagen. Methods A total of 100 spinal surgery patients without fragility fracture (54 males and 46 females) treated at our hospital were enrolled. The amount of pentosidine in blood, urine, skin and bone (lumbar lamina) samples from these patients was measured. AGE accumulation was assessed by measuring skin autofluorescence. We examined the correlation between pentosidine content in tissues and body fluid, as well as skin AGEs with age, height, body weight, BMI, and estimated glomerular filtration rate (eGFR). Results A significant age-related increase in pentosidine levels in tissues was observed, while there was a significant negative correlation between tissue pentosidine and eGFR. The amount of skin pentosidine was significantly and positively correlated with pentosidine content of the bone in those under 50 years of age. Urine pentosidine also correlated positively with bone pentosidine and skin pentosidine, but only in females. The total amount of AGEs in skin did not correlate with bone pentosidine. Conclusion In this study, the strong correlation between the pentosidine content in each sample and eGFR may indicate that renal dysfunction with advancing age increases oxidative stress and induces AGEs formation in collagen-containing tissues. The correlation of skin pentosidine concentration and eGFR, with AGEs formation in bone collagen suggests that pentosidine would be a useful indirect index of decreased bone quality. Skin AGEs estimated by autofluorescence in clinical situations may not be suitable as an indirect assessment of bone quality. Because urine pentosidine correlated positively with bone pentosidine and skin pentosidine in females, urine pentosidine may be a candidate for an indirect assessment of bone quality.
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Affiliation(s)
- Yoshikuni Kida
- Department of Orthopaedic Surgery, Jikei University School of Medicine, 3-25-8, Nishi-Shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Mitsuru Saito
- Department of Orthopaedic Surgery, Jikei University School of Medicine, 3-25-8, Nishi-Shinbashi, Minato-ku, Tokyo, 105-8461, Japan.
| | - Akira Shinohara
- Department of Orthopaedic Surgery, Jikei University School of Medicine, 3-25-8, Nishi-Shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Shigeru Soshi
- Department of Orthopaedic Surgery, Jikei University School of Medicine, 3-25-8, Nishi-Shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Keishi Marumo
- Department of Orthopaedic Surgery, Jikei University School of Medicine, 3-25-8, Nishi-Shinbashi, Minato-ku, Tokyo, 105-8461, Japan
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Mishima Y, Brueckner L, Takahashi S, Kawakami T, Otani J, Shinohara A, Takeshita K, Garvilles RG, Watanabe M, Sakai N, Takeshima H, Nachtegael C, Nishiyama A, Nakanishi M, Arita K, Nakashima K, Hojo H, Suetake I. Enhanced processivity of Dnmt1 by monoubiquitinated histone H3. Genes Cells 2019; 25:22-32. [DOI: 10.1111/gtc.12732] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 10/30/2019] [Accepted: 10/30/2019] [Indexed: 12/30/2022]
Affiliation(s)
- Yuichi Mishima
- Laboratory of Epigenetics Institute for Protein Research Osaka University Suita Japan
| | - Laura Brueckner
- Laboratory of Epigenetics Institute for Protein Research Osaka University Suita Japan
| | - Saori Takahashi
- Laboratory of Epigenetics Institute for Protein Research Osaka University Suita Japan
| | - Toru Kawakami
- Laboratory of Organic Chemistry Institute for Protein Research Osaka University Suita Japan
| | - Junji Otani
- Laboratory of Epigenetics Institute for Protein Research Osaka University Suita Japan
| | - Akira Shinohara
- Laboratory of Genome‐Chromosome Function Institute for Protein Research Osaka University Suita Japan
| | | | | | - Mikio Watanabe
- Center for Twin Research Graduate School of Medicine Osaka University Suita Japan
| | - Norio Sakai
- Center for Twin Research Graduate School of Medicine Osaka University Suita Japan
| | - Hideyuki Takeshima
- Division of Epigenomics National Cancer Center Research Institute Tokyo Japan
| | - Charlotte Nachtegael
- Laboratory of Epigenetics Institute for Protein Research Osaka University Suita Japan
- Interuniversity Institute of Bioinformatics in Brussels Universite Libre de Bruxelles‐Vrije Universiteit Brussel Brussels Belgium
| | - Atsuya Nishiyama
- Division of Cancer Cell Biology The Institute of Medical Science The University of Tokyo Tokyo Japan
| | - Makoto Nakanishi
- Division of Cancer Cell Biology The Institute of Medical Science The University of Tokyo Tokyo Japan
| | - Kyohei Arita
- Graduate School of Medical Life Science Yokohama City University Yokohama Japan
| | - Kinichi Nakashima
- Department of Stem Cell Biology and Medicine Graduate School of Medical Sciences Kyushu University Fukuoka Japan
| | - Hironobu Hojo
- Laboratory of Organic Chemistry Institute for Protein Research Osaka University Suita Japan
| | - Isao Suetake
- Laboratory of Epigenetics Institute for Protein Research Osaka University Suita Japan
- Center for Twin Research Graduate School of Medicine Osaka University Suita Japan
- College of Nutrition Koshien University Takarazuka Japan
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Shinohara M, Bishop DK, Shinohara A. Distinct Functions in Regulation of Meiotic Crossovers for DNA Damage Response Clamp Loader Rad24(Rad17) and Mec1(ATR) Kinase. Genetics 2019; 213:1255-1269. [PMID: 31597673 PMCID: PMC6893372 DOI: 10.1534/genetics.119.302427] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 10/02/2019] [Indexed: 11/18/2022] Open
Abstract
The number and distribution of meiotic crossovers (COs) are highly regulated, reflecting the requirement for COs during the first round of meiotic chromosome segregation. CO control includes CO assurance and CO interference, which promote at least one CO per chromosome bivalent and evenly-spaced COs, respectively. Previous studies revealed a role for the DNA damage response (DDR) clamp and the clamp loader in CO formation by promoting interfering COs and interhomolog recombination, and also by suppressing ectopic recombination. In this study, we use classical tetrad analysis of Saccharomyces cerevisiae to show that a mutant defective in RAD24, which encodes the DDR clamp loader (RAD17 in other organisms), displayed reduced CO frequencies on two shorter chromosomes (III and V), but not on a long chromosome (chromosome VII). The residual COs in the rad24 mutant do not show interference. In contrast to rad24, mutants defective in the ATR kinase homolog Mec1, including a mec1 null and a mec1 kinase-dead mutant, show slight or few defects in CO frequency. On the other hand, mec1 COs show defects in interference, similar to the rad24 mutant. Our results support a model in which the DDR clamp and clamp-loader proteins promote interfering COs by recruiting pro-CO Zip, Mer, and Msh proteins to recombination sites, while the Mec1 kinase regulates CO distribution by a distinct mechanism. Moreover, CO formation and its control are implemented in a chromosome-specific manner, which may reflect a role for chromosome size in regulation.
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Affiliation(s)
- Miki Shinohara
- Institute for Protein Research, Osaka University, 565-0871, Japan
- Graduate School of Agriculture, Kindai University, Nara 631-8505, Japan
- Department of Radiation Oncology, University of Chicago, Illinois 60637
- Department of Molecular Genetics and Cell Biology, University of Chicago, Illinois 60637
| | - Douglas K Bishop
- Department of Radiation Oncology, University of Chicago, Illinois 60637
- Department of Molecular Genetics and Cell Biology, University of Chicago, Illinois 60637
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, 565-0871, Japan
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Challa K, Shinohara M, Shinohara A. Meiotic prophase-like pathway for cleavage-independent removal of cohesin for chromosome morphogenesis. Curr Genet 2019; 65:817-827. [PMID: 30923890 DOI: 10.1007/s00294-019-00959-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 03/20/2019] [Accepted: 03/20/2019] [Indexed: 12/11/2022]
Abstract
Sister chromatid cohesion is essential for chromosome segregation both in mitosis and meiosis. Cohesion between two chromatids is mediated by a protein complex called cohesin. The loading and unloading of the cohesin are tightly regulated during the cell cycle. In vertebrate cells, cohesin is released from chromosomes by two distinct pathways. The best characterized pathway occurs at the onset of anaphase, when the kleisin component of the cohesin is destroyed by a protease, separase. The cleavage of the cohesin by separase releases entrapped sister chromatids allowing anaphase to commence. In addition, prior to the metaphase-anaphase transition, most of cohesin is removed from chromosomes in a cleavage-independent manner. This cohesin release is referred to as the prophase pathway. In meiotic cells, sister chromatid cohesion is essential for the segregation of homologous chromosomes during meiosis I. Thus, it was assumed that the prophase pathway for cohesin removal from chromosome arms would be suppressed during meiosis to avoid errors in chromosome segregation. However, recent studies revealed the presence of a meiosis-specific prophase-like pathway for cleavage-independent removal of cohesin during late prophase I in different organisms. In budding yeast, the cleavage-independent removal of cohesin is mediated through meiosis-specific phosphorylation of cohesin subunits, Rec8, the meiosis-specific kleisin, and the yeast Wapl ortholog, Rad61/Wpl1. This pathway plays a role in chromosome morphogenesis during late prophase I, promoting chromosome compaction. In this review, we give an overview of the prophase pathway for cohesin dynamics during meiosis, which has a complex regulation leading to differentially localized populations of cohesin along meiotic chromosomes.
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Affiliation(s)
- Kiran Challa
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan
- Friedrich Miescher Institute for Biomedical Research, CH-4058, Basel, Switzerland
| | - Miki Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan
- Graduate School of Agriculture, Kindai University, Nara, 631-8505, Japan
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan.
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Shinohara A, Pan C, Guo Z, Zhou L, Liu Z, Du L, Yan Z, Stadler FJ, Wang L, Nakanishi T. Viskoelastische konjugierte polymere Fluide. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903148] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Akira Shinohara
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic EngineeringShenzhen University Nanhai Avenue 3688, Nanshan Shenzhen 518060 China
| | - Chengjun Pan
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Zhenfeng Guo
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Liyang Zhou
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Zhonghua Liu
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Lei Du
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Zhichao Yan
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Florian J. Stadler
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
| | - Lei Wang
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic EngineeringShenzhen University Nanhai Avenue 3688, Nanshan Shenzhen 518060 China
| | - Takashi Nakanishi
- Shenzhen Key Laboratory of Polymer Science and TechnologyCollege of Materials Science and EngineeringShenzhen University Xueyuan Avenue 1066, Nanshan Shenzhen 518055 China
- International Center for Materials Nanoarchitectonics (WPI-MANA)National Institute for Materials Science (NIMS) Namiki 1-1 Tsukuba 305-0044 Japan
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Shinohara A, Pan C, Guo Z, Zhou L, Liu Z, Du L, Yan Z, Stadler FJ, Wang L, Nakanishi T. Viscoelastic Conjugated Polymer Fluids. Angew Chem Int Ed Engl 2019; 58:9581-9585. [PMID: 31034736 DOI: 10.1002/anie.201903148] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/16/2019] [Indexed: 12/24/2022]
Abstract
The introduction of optoelectronic functions into viscoelastic polymers can yield highly sophisticated soft materials for biomedical devices and autonomous robotics. However, viscoelasticity and excellent optoelectronic properties are difficult to achieve because the presence of a large number of π-conjugated moieties drastically stiffens a polymer. Here, we report a variation of additive-free viscoelastic conjugated polymers (VE-CPs) at room temperature by using an intact π-conjugated backbone and bulky, yet flexible, alkyl side chains as "internal plasticizers." Some of these polymers exhibit gel- and elastomer-like rheological behaviors without cross-linking or entanglement. Furthermore, binary blends of these VE-CPs exhibit a never-seen-before dynamic miscibility with self-restorable and mechanically induced fluorescence color changes.
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Affiliation(s)
- Akira Shinohara
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China.,Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Nanhai Avenue 3688, Nanshan, Shenzhen, 518060, China
| | - Chengjun Pan
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Zhenfeng Guo
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Liyang Zhou
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Zhonghua Liu
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Lei Du
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Zhichao Yan
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Florian J Stadler
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China
| | - Lei Wang
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China.,Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Nanhai Avenue 3688, Nanshan, Shenzhen, 518060, China
| | - Takashi Nakanishi
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Xueyuan Avenue 1066, Nanshan, Shenzhen, 518055, China.,International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, 305-0044, Japan
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Tauchi J, Shinohara A, Ohashi K, Shibuki T, Kimura G, Umemoto K, Watanabe K, Sasaki M, Takahashi H, Hashimoto Y, Imaoka H, Ohno I, Mitsunaga S, Ikeda M, Kawasaki T. Impact of glycemic control on treatment efficacy and safety during nabpaclitaxel plus gemcitabine therapy in unresectable pancreatic cancer. J Clin Oncol 2019. [DOI: 10.1200/jco.2019.37.4_suppl.337] [Citation(s) in RCA: 0] [Impact Index Per Article: 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
337 Background: Diabetes mellitus (DM) and hyperglycemia have been widely considered to be associated with the risk of pancreatic cancer. However, the aim of this study was to evaluate the relationship between glycemic control and the efficacy or safety in pancreatic cancer pts receiving treatment with nab-Paclitaxel (nab-PTX) plus Gemcitabine (GEM). Methods: We retrospectively reviewed 285 pts with unresectable pancreatic cancer with nab-PTX plus GEM as the first-line chemotherapy from December 2014 to March 2017 at the National Cancer Center Hospital East, Kashiwa, Japan. The pts were divided into two groups, average blood glucose level during the period of chemotherapy was less than 160 mg/dL (Group GC: Good glycemic control group) and more than 160 mg/dL (Group PC: Poor glycemic control group). Results: A total of 285 pts were enrolled. Median age was 66 years (range: 26-84) and males/females: 180/105, PS (0-1/2-3): 272/13, stage (III/IV): 77/208. There were 226 pts in GC group and 59 pts in PC group. No significant differences were seen in the overall survival between Group GC and PC (median: 16.1 months vs. 13.8 months, p = 0.344) and in the progression free survival between the two groups (median: 7.5 months vs. 8.2 months, p = 0.862). The incidence rate of grade 2-3 chemotherapy-induced peripheral neuropathy (CIPN) was significantly higher in Group PC compared with Group GC (Group GC 28.3%, Group PC 45.8%, p = 0.010). Univariate and multivariate analyses identified glycemic control as significant independent factors associated with the incidence of grade 2-3 of CIPN (Odds ratio 2.182, 95% CI 1.20-3.96, p = 0.010). There was no significant difference in the relative dose intensity of nab-PTX between two groups (median, 56.6% in group GC, 56.5% in group PC, p = 0.952). Conclusions: Glycemic control during the chemotherapy with nab-PTX plus GEM in unresectable pancreatic cancer was not associated with OS. The incidence of severe CIPN was higher in pts with poor glycemic control compared with good glycemic control.
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Affiliation(s)
- Junko Tauchi
- Department of Pharmacy, National Cancer Center Hospital East, Kashiwa City, Japan
| | - Akira Shinohara
- Department of Pharmacy, National Cancer Center Hospital East, Kashiwa, Japan
| | - Ken Ohashi
- Department of General Internal Medicine, National Cancer Center Hospital, Tokyo, Japan
| | - Taro Shibuki
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Gen Kimura
- National Cancer Center Hospital East, Kashiwa, Japan
| | | | | | | | - Hideaki Takahashi
- Department of Hepatobiliary and Pancreatic Oncology, National Cancer Center Hospital East, Kashiwa, Japan
| | - Yusuke Hashimoto
- Department of Hepatobiliary and Pancreatic Oncology, National Cancer Center Hospital East, Kashiwa, Japan
| | | | - Izumi Ohno
- National Cancer Center Hospital East, Kashiwa, Japan
| | | | | | - Toshikatsu Kawasaki
- Department of Pharmacy, National Cancer Center Hospital East, Kashiwa, Japan
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Bommi JR, Rao HBDP, Challa K, Higashide M, Shinmyozu K, Nakayama JI, Shinohara M, Shinohara A. Meiosis-specific cohesin component, Rec8, promotes the localization of Mps3 SUN domain protein on the nuclear envelope. Genes Cells 2019; 24:94-106. [PMID: 30417519 DOI: 10.1111/gtc.12653] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 10/29/2018] [Accepted: 10/31/2018] [Indexed: 12/12/2022]
Abstract
Proteins in the nuclear envelope (NE) play a role in the dynamics and functions of the nucleus and of chromosomes during mitosis and meiosis. Mps3, a yeast NE protein with a conserved SUN domain, predominantly localizes on a yeast centrosome equivalent, spindle pole body (SPB), in mitotic cells. During meiosis, Mps3, together with SPB, forms a distinct multiple ensemble on NE. How meiosis-specific NE localization of Mps3 is regulated remains largely unknown. In this study, we found that a meiosis-specific component of the protein complex essential for sister chromatid cohesion, Rec8, binds to Mps3 during meiosis and controls Mps3 localization and proper dynamics on NE. Ectopic expression of Rec8 in mitotic yeast cells induced the formation of Mps3 patches/foci on NE. This required the cohesin regulator, WAPL ortholog, Rad61/Wpl1, suggesting that a meiosis-specific cohesin complex with Rec8 controls NE localization of Mps3. We also observed that two domains of the nucleoplasmic region of Mps3 are essential for NE localization of Mps3 in mitotic as well as meiotic cells. We speculate that the interaction of Mps3 with the meiosis-specific cohesin in the nucleoplasm is a key determinant for NE localization/function of Mps3.
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Affiliation(s)
| | | | - Kiran Challa
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Mika Higashide
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | | | - Jun-Ichi Nakayama
- RIKEN Center for Developmental Biology, Kobe, Japan
- Division of Chromatin Regulation, National Institute for Basic Biology, Okazaki, Japan
| | - Miki Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Akira Shinohara
- Institute for Protein Research, Osaka University, Suita, Osaka, Japan
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Shinohara A, Andoh T, Saiki I, Kuraishi Y. Analgesic effects of systemic fentanyl on cancer pain are mediated by not only central but also peripheral opioid receptors in mice. Eur J Pharmacol 2018; 833:275-282. [DOI: 10.1016/j.ejphar.2018.06.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 06/06/2018] [Accepted: 06/06/2018] [Indexed: 10/14/2022]
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Narayan B, Nagura K, Takaya T, Iwata K, Shinohara A, Shinmori H, Wang H, Li Q, Sun X, Li H, Ishihara S, Nakanishi T. The effect of regioisomerism on the photophysical properties of alkylated-naphthalene liquids. Phys Chem Chem Phys 2018; 20:2970-2975. [DOI: 10.1039/c7cp05584f] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Novel alkylated naphthalene liquids with a correlation among the 1- and 2-regioisomeric chemical structures and their photophysical, calorimetric and rheological properties are presented.
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Ishii M, Murase H, Fukuda Y, Sawada K, Sasakura T, Tamura T, Bando T, Matsuoka K, Shinohara A, Nakatsuka S, Katsumata N, Okazaki M, Miyashita K, Mitani Y. Diving Behavior of Sei WhalesBalaenoptera borealisRelative to the Vertical Distribution of Their Potential Prey. Mammal Study 2017. [DOI: 10.3106/041.042.0403] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Midori Ishii
- Graduate School of Environmental Science, Hokkaido University, 20-5 Benten-cho, Hakodate, Hokkaido 040-0051, Japan
| | - Hiroto Murase
- National Research Institute of Far Seas Fisheries, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Kanazawa, Yokohama, Kanagawa 236-8648, Japan
| | - Yoshiaki Fukuda
- National Research Institute of Fisheries Engineering, Japan Fisheries Research and Education Agency, 7620-7 Hasaki, Kamisu, Ibaraki 314-0408, Japan
| | - Kouichi Sawada
- National Research Institute of Fisheries Engineering, Japan Fisheries Research and Education Agency, 7620-7 Hasaki, Kamisu, Ibaraki 314-0408, Japan
| | - Toyoki Sasakura
- Tokyo University of Marine Science and Technology, 4-5-7, Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Tsutomu Tamura
- The Institute of Cetacean Research, 4-5, Toyomi-cho, Chuo-ku, Tokyo 104-0055, Japan
| | - Takeharu Bando
- The Institute of Cetacean Research, 4-5, Toyomi-cho, Chuo-ku, Tokyo 104-0055, Japan
| | - Koji Matsuoka
- The Institute of Cetacean Research, 4-5, Toyomi-cho, Chuo-ku, Tokyo 104-0055, Japan
| | - Akira Shinohara
- Graduate School of Environmental Science, Hokkaido University, 20-5 Benten-cho, Hakodate, Hokkaido 040-0051, Japan
| | - Sayaka Nakatsuka
- National Research Institute of Far Seas Fisheries, Japan Fisheries Research and Education Agency, 5-7-1 Orido, Shimizu-ku, Shizuoka-shi, Shizuoka 424-8633, Japan
| | - Nobuhiro Katsumata
- National Research Institute of Far Seas Fisheries, Japan Fisheries Research and Education Agency, 5-7-1 Orido, Shimizu-ku, Shizuoka-shi, Shizuoka 424-8633, Japan
| | - Makoto Okazaki
- National Research Institute of Far Seas Fisheries, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Kanazawa, Yokohama, Kanagawa 236-8648, Japan
| | - Kazushi Miyashita
- Field Science Center for Northern Biosphere, Hokkaido University, 20-5 Benten-cho, Hakodate, Hokkaido 040-0051, Japan
| | - Yoko Mitani
- Field Science Center for Northern Biosphere, Hokkaido University, 20-5 Benten-cho, Hakodate, Hokkaido 040-0051, Japan
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Shinohara A, Sairyo K, Mishiro T, Chikawa T, Soshi S. Insertional Torque in Cervical Vertebrae Lateral Mass Screw Fixation: Magerl Technique Versus Roy-Camille Technique. Clin Spine Surg 2017; 30:E1156-E1159. [PMID: 27623298 DOI: 10.1097/bsd.0000000000000430] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
STUDY DESIGN This is a prospective multicenter comparison study. OBJECTIVE To measure the insertional torque (IT) for cervical vertebra lateral mass screw (LMS) fixation using the Magerl and Roy-Camille methods, at the discretion of the surgeon. SUMMARY OF BACKGROUND DATA Current fixation methods for patients with preoperative cervical spine instability use LMSs; however, few studies have closely examined intraoperative IT. Patients' bone quality was not measured. METHODS A total of 637 posterior cervical multiaxial screws were inserted for LMS (C3-C6) (Magerl technique, 423; Roy-Camille technique, 214) in 107 cases. Patients' mean age was 66 years. Patients treated with the Magerl method were divided into 2 groups, with the men in the MM group and the women in the MF group. Similarly, patients treated with the Roy-Camille method were divided into 2 groups, with the men in the RM group and the women in the RF group. The contralateral cortex was penetrated, and the IT at cerclage was measured at the last time. RESULTS IT of the lateral mass screw was 53.8±22.4, 45.4±21, 45.5±16.9, and 34±16.4 cN.m in the MM group (258), MF group (165), RM group (163), and RF group (51), respectively. The MM group had a significantly higher IT than the other 3 groups, and the RM group had a significantly higher IT than the RF group. When the correlation between screw length and IT was evaluated, IT was significantly (P<0.05) higher with a longer screw by the Magerl method. CONCLUSIONS The IT was higher with the Magerl method with a longer screw. Screw length and IT were not correlated with the Roy-Camille method; furthermore, the Roy-Camille method went through bilateral cortical bone perpendicularly, so that IT was determined by the fixation power in the cortical part of the bone, which was not thought to be affected by screw length. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
- Akira Shinohara
- *Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo †Department of Orthopaedics, Institute of Health Biosciences, University of Tokushima, Tokushima ‡Department of Orthopaedic Surgery, Takamatsu Red Cross Hospital, Kagawa §Department of Orthopaedic Surgery, Tokushima Municipal Hospital, Tokushima, Japan
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