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Showing 1–50 of 82 results

Advanced filters: Author: Koichi Masuda Clear advanced filters

Radical Polymerization of Highly Isotactic and Syndiotactic Poly(methyl methacrylate) Macromonomers

Eiji Masuda
Shigeki Kishiro
Koichi Hatada
Research01 Jul 1991
Polymer Journal

Volume: 23, P: 847-857
Studies on the Radical Polymerization of Methyl Methacrylate in Bulk and in Benzene Using Totally Deuterated Monomer Technique

Koichi Hatada
Tatsuki Kitayama
Eiji Masuda
Research01 May 1986
Polymer Journal

Volume: 18, P: 395-402
Deciphering state-dependent immune features from multi-layer omics data at single-cell resolution

A single-cell multiomic immune cell atlas from 235 Japanese, including patients with COVID-19 and healthy individuals, linked with host genetics including germline and somatic mutation, plasma proteomics and metagenomics data reveals that immune cells are dynamically regulated in a cell state-dependent manner.

Ryuya Edahiro
Go Sato
Yukinori Okada
ResearchOpen Access28 Jul 2025
Nature Genetics

Volume: 57, P: 1905-1921
Low-voltage-area ablation for persistent atrial fibrillation: a randomized controlled trial

In view of previous work suggesting that low-voltage areas may promote atrial fibrillation, a multicenter, randomized controlled trial tested the hypothesis that ablation of low-voltage areas in addition to pulmonary vein isolation might reduce the recurrence of atrial arrhythmic events, but found no significant benefit to the combined procedure.

Masaharu Masuda
Akihiro Sunaga
Takuya Ohashi
ResearchOpen Access30 Apr 2025
Nature Medicine

Volume: 31, P: 1661-1667
Rituximab-induced long-term remission in childhood-onset, uncomplicated, frequently relapsing or steroid-dependent nephrotic syndrome: a randomized, placebo-controlled trial and a follow-up study

Kazumoto Iijima
Mayumi Sako
Mari Oba
ResearchOpen Access10 Oct 2025
Scientific Reports

Volume: 15, P: 1-14
Klebsormidium flaccidum genome reveals primary factors for plant terrestrial adaptation

Plant colonization of land is an important evolutionary event. Here, the authors sequence the genome of a filamentous terrestrial alga and, through a comparative analysis with related algae and land plant species, provide insight into how aquatic algae adapted to terrestrial environments.

Koichi Hori
Fumito Maruyama
Hiroyuki Ohta
ResearchOpen Access28 May 2014
Nature Communications

Volume: 5, P: 1-9
Evidence for Disproportionate in Termination Reaction of Styrene Polymerization by α,α′-Azobisisobutyronitrile

Koichi Hatada
Tatsuki Kitayama
Fiji Masuda
Research01 Aug 1985
Polymer Journal

Volume: 17, P: 985-989
DOCK2 is involved in the host genetics and biology of severe COVID-19

A genome-wide association study highlights a variant in DOCK2, which is common in East Asian populations but rare in Europeans, as a host genetic risk factor for severe COVID-19.

Ho Namkoong
Ryuya Edahiro
Yukinori Okada
ResearchOpen Access08 Aug 2022
Nature

Volume: 609, P: 754-760
Stereoregular Oligomers of Methyl Methacrylate III. ¹H and ¹³C NMR Spectra of the Pure-Isotactic and Pure-Syndiotactic Oligomers from Dimers to Octamers

Koichi Ute
Tohru Nishimura
Koichi Hatada
Research01 Dec 1989
Polymer Journal

Volume: 21, P: 1027-1041
Stereospecific Polymerization of Stereoregular Poly(methyl methacrylate) Macromonomer and Determination of Main-Chain Tacticity of Resulting Polymacromonomer

Tatsuki Kitayama
Osamu Nakagawa
Koichi Hatada
Research01 Feb 1996
Polymer Journal

Volume: 28, P: 150-154
Usefulness of Soil p-Nitrophenyl Acetate Esterase Activity as a Tool to Monitor Biodegradation of Polybutylene Succinate (PBS) in Cultivated Soil

Yasuo Sakai
Mari Isokawa
Koichi Hayano
Research01 Oct 2002
Polymer Journal

Volume: 34, P: 767-774
The whole blood transcriptional regulation landscape in 465 COVID-19 infected samples from Japan COVID-19 Task Force

Genetic mechanisms influencing COVID-19 susceptibility are not well understood. Here, the authors analyzed whole blood RNA-seq data of 465 Japanese individuals with COVID-19, highlighting thousands of fine-mapped variants affecting expression and splicing of genes, as well as the presence of COVID-19 severity-interaction eQTLs.

Qingbo S. Wang
Ryuya Edahiro
Yukinori Okada
ResearchOpen Access22 Aug 2022
Nature Communications

Volume: 13, P: 1-19
Identification and replication of sex-dimorphic protein quantitative trait loci across multiple ancestries and their associations with diseases

Youngjune Bhak
Vasilis Raptis
Albert Tenesa
ResearchOpen Access28 Aug 2025
Scientific Reports

Volume: 15, P: 1-16
Blood DNA virome associates with autoimmune diseases and COVID-19

Analysis of the blood DNA virome in patients with COVID-19 and autoimmune disease associates endogenous HHV-6 (eHHV-6) and high anellovirus load with increased disease risk, most notably for systemic lupus erythematosus. eHHV-6 carriers show a distinct immune response.

Noah Sasa
Shohei Kojima
Yukinori Okada
ResearchOpen Access03 Jan 2025
Nature Genetics

Volume: 57, P: 65-79
Determination of Molecular Weight of Poly(methyl methacrylate) by Deuteriwn NMR and Its Reliability

Koichi Hatada
Koichi Ute
Masaharu Kashiyama
Research01 Oct 1990
Polymer Journal

Volume: 22, P: 853-857
Preparation of Highly Stereoregular Poly(methacrylic acid) by Stereospecific Anionic Polymerization of Trimethylsilyl Methacrylate

Tatsuki Kitayama
Shougang He
Koichi Hatada
Research01 Mar 1995
Polymer Journal

Volume: 27, P: 314-318
Inverse Gas Chromatography on Graft and Random Copolymers of Styrene and 2-Hydroxyethyl Methacrylate

Koichi Ito
Yutaka Masuda
Yuya Yamashita
Research01 Aug 1983
Polymer Journal

Volume: 15, P: 577-583
Preparation of Highly Heterotactic Polymethacrylate with Narrow Molecular Weight Distribution by t-Butyllithium/Bis(2,6-di-t-butylphenoxy)methylaluminum in Toluene

Tatsuki Kitayama
Yajun Zhang
Koichi Hatada
Research01 Jul 1994
Polymer Journal

Volume: 26, P: 868-872
Syndiotactic-Specific Polymerization of Methacrylates by Tertiary Phosphine-Triethylaluminum

Tatsuki Kitayama
Eiji Masuda
Koichi Hatada
Research01 Aug 1992
Polymer Journal

Volume: 24, P: 817-827
Correction: Corrigendum: Regulation of histone modification and chromatin structure by the p53–PADI4 pathway

Chizu Tanikawa
Martha Espinosa
Koichi Matsuda
Amendments and Corrections16 Oct 2013
Nature Communications

Volume: 4, P: 1
Stereoregular Oligomers of Methyl Methacrylate: X-Ray Crystal Structure Analysis and ¹H NMR Spectrum of the Trimer

Koichi Ute
Tohru Nishimura
Koichi Hatada
Research01 Mar 1989
Polymer Journal

Volume: 21, P: 231-240
Effect of NMR Signal from Initiator Fragment on Triad Tacticities of Poly(methyl methacrylate)s Formed by 2,2′-Azobisisobutyronitrile and Benzoyl Peroxide

Koichi Hatada
Tatsuki Kitayama
Riichirô Chûjô
Research01 Sept 1987
Polymer Journal

Volume: 19, P: 1127-1129
Reactivities and ¹³C NMR Spectra of Alkyl Vinyl Ethers

Heimei Yuki
Koichi Hatada
Tomoyuki Emura
Research01 Mar 1970
Polymer Journal

Volume: 1, P: 269-270
Synthesis and Interfacial Characterization of Graft and Random Copolymers of Styrene and 2-Hydroxyethyl Methacrylate

Koichi Ito
Yutaka Masuda
Yuya Yamashita
Research01 Jun 1983
Polymer Journal

Volume: 15, P: 443-448
A New Teleocidin Analog from Streptomyces sp. MM216-87F4 Induces Substance P Release from Rat Dorsal Root Ganglion Neurons

Koichi Nakae
Nobuo Hosokawa
Yuzuru Akamatsu
Research01 Jan 2006
The Journal of Antibiotics

Volume: 59, P: 11-17
Single-cell analyses and host genetics highlight the role of innate immune cells in COVID-19 severity

Peripheral blood mononuclear cells from 73 Japanese patients with coronavirus disease 2019 (COVID-19) and 75 healthy controls were analyzed using single-cell transcriptomics. Combining these data with genotyping data highlights the interplay between host genetics and the immune response in modulating disease severity.

Ryuya Edahiro
Yuya Shirai
Yukinori Okada
ResearchOpen Access24 Apr 2023
Nature Genetics

Volume: 55, P: 753-767
Controlling ²²⁹Th isomeric state population in a VUV transparent crystal

Thorium-229 has the extraordinarily low-energy nuclear state and therefore has potential in atomic clocks. Here, the authors measured the radiative branching fraction of the “clock state”, which is consistent with unity in crystals, and found that this state can be de-populated by X-ray beam irradiation.

Takahiro Hiraki
Koichi Okai
Koji Yoshimura
ResearchOpen Access16 Jul 2024
Nature Communications

Volume: 15, P: 1-10
Synthesis of Graft Polymer with Controlled Stereoregularities in the Main Chain and in the Side Chains by Stereospecific Copolymerization of Isotactic Poly(methyl methacrylate) Macromonomer with Methacrylate Monomer

Tatsuki Kitayama
Osamu Nakagawa
Koichi Hatada
Research01 Dec 1995
Polymer Journal

Volume: 27, P: 1180-1193
Losartan Improves the Impaired Function of Endothelial Progenitor Cells in Hypertension via an Antioxidant Effect

En-Hui Yao
Noboru Fukuda
Koichi Matsumoto
Research01 Nov 2007
Hypertension Research

Volume: 30, P: 1119-1128
Control of Main-Chain Stereostructure of Graft Polymers via Stereospecific Anionic Copolymerization of Syndiotactic Poly(methyl methacrylate) Macromonomer Having Methacryloyl Function with Methacrylate Monomers

Tatsuki Kitayama
Osamu Nakagawa
Koichi Hatada
Research01 Jul 1993
Polymer Journal

Volume: 25, P: 707-720
Mapping the human genetic architecture of COVID-19

A global network of researchers was formed to investigate the role of human genetics in SARS-CoV-2 infection and COVID-19 severity; this paper reports 13 genome-wide significant loci and potentially actionable mechanisms in response to infection.

Mari E. K. Niemi
Juha Karjalainen
Chloe Donohue
ResearchOpen Access08 Jul 2021
Nature

Volume: 600, P: 472-477
High-Performance Liquid Chromatography Using Stereoregular Poly(methyl methacrylate)s as Stationary Phases

Yoshio Okamoto
Masanori Yanagida
Koichi Hatada
Research01 Oct 1989
Polymer Journal

Volume: 21, P: 795-801
Raman Spectra and Conformations of Copolypeptides Containing Glycine, L-Alanine, and L-Phenylalanine Residues

Koichi Itoh
Masanao Oya
Research01 Nov 1986
Polymer Journal

Volume: 18, P: 837-842
Potency of Carbapenems for the Prevention of Carbapenem-Resistant Mutants of Pseudomonas aeruginosa

Shihomi Sakyo
Haruyoshi Tomita
Yasuyoshi Ike
Research01 Apr 2006
The Journal of Antibiotics

Volume: 59, P: 220-228
Impaired flow-dependent control of vascular tone and remodeling in P2X4-deficient mice

Kimiko Yamamoto
Takaaki Sokabe
Joji Ando
Research04 Dec 2005
Nature Medicine

Volume: 12, P: 133-137
Genetic and phenotypic landscape of the major histocompatibilty complex region in the Japanese population

Sequencing of the MHC region in the Japanese population provides insight into population-specific allelic and structural variability. These data enable discovery and fine-mapping of genotype–phenotype associations across 52 phenotypes.

Jun Hirata
Kazuyoshi Hosomichi
Yukinori Okada
Research28 Jan 2019
Nature Genetics

Volume: 51, P: 470-480
Solvent Effects in Radical Copolymerization between Hydrophilic and Hydrophobic Monomers; 2-Hydroxyethyl Methacrylate and Lauryl Methacrylate

Koichi Ito
Koji Uchida
Takeo Matsumoto
Research01 Jun 1985
Polymer Journal

Volume: 17, P: 761-766
Separation of Poly(methyl methacrylate)s According to Their Tacticity II. Chromatographic Investigations of Poly(methyl methacrylate)s with Different Tacticity at the Critical Adsorption Point

Dusan Berek
Miroslav Janco
Nobutaka Fujimoto
Research01 Dec 1997
Polymer Journal

Volume: 29, P: 1029-1033
Dipole Moments of Isotactic and Syndiotactic Poly(methyl methacrylate) and Their Temperature Dependence

Mikiko Shima
Mari Sato
Koichi Hatada
Research01 May 1994
Polymer Journal

Volume: 26, P: 579-585
Mohawk promotes the maintenance and regeneration of the outer annulus fibrosus of intervertebral discs

Homeobox protein Mohwak (Mkx) is involved in tendon and ligament development. Here the authors show that Mkx in the outer annulus fibrosus of the intervertebral disc plays a role in maintenance of the IVD, showing that stem cells overexpressing Mkx enhance therapeutic IVD regeneration in mice.

Ryo Nakamichi
Yoshiaki Ito
Hiroshi Asahara
ResearchOpen Access16 Aug 2016
Nature Communications

Volume: 7, P: 1-14
Exhaustion of nucleus pulposus progenitor cells with ageing and degeneration of the intervertebral disc

Back pain and sciatica are often caused by intervertebral disc degeneration. Sakai and colleagues identify a subset of nucleus pulposus progenitor cells from the intervertebral disc and show that loss of these progenitor cells correlates with ageing and intervertebral disc degeneration.

Daisuke Sakai
Yoshihiko Nakamura
Joji Mochida
ResearchOpen Access11 Dec 2012
Nature Communications

Volume: 3, P: 1-11
Regulation of histone modification and chromatin structure by the p53–PADI4 pathway

PADI4 is an enzyme that converts arginine residues to citrulline. Here, Tanikawa and colleagues show that, in response to DNA damage, histone H4 and Lamin C are citrullinated in a p53 and PADI4-dependent manner andPadi4-dependent manner and Padi4 null mice are resistant to radiation-induced apoptosis in the thymus.

Chizu Tanikawa
Martha Espinosa
Koichi Matsuda
Research14 Feb 2012
Nature Communications

Volume: 3, P: 1-11
Alteration of serum amino acid profiles by dietary adenine supplementation inhibits fatty liver development in rats

Hiroki Nishi
Daisuke Yamanaka
Shin-Ichiro Takahashi
ResearchOpen Access17 Dec 2020
Scientific Reports

Volume: 10, P: 1-10
A second update on mapping the human genetic architecture of COVID-19

Masahiro Kanai
Shea J. Andrews
Matthew Solomonson
ResearchOpen Access06 Sept 2023
Nature

Volume: 621, P: E7-E26
Early prediction of functional impairment at hospital discharge in patients with osteoporotic vertebral fracture: a machine learning approach

Soichiro Masuda
Toshiki Fukasawa
Koji Kawakami
ResearchOpen Access28 Dec 2024
Scientific Reports

Volume: 14, P: 1-10
Genome-wide association meta-analysis identifies GP2 gene risk variants for pancreatic cancer

Previous genome-wide association studies have identified risk loci for pancreatic cancer but were centered on individuals of European ancestry. Here the authors identify GP2 gene variants associated with pancreatic cancer susceptibility in populations of East Asian ancestry.

Yingsong Lin
Masahiro Nakatochi
Keitaro Matsuo
ResearchOpen Access24 Jun 2020
Nature Communications

Volume: 11, P: 1-12
Triplon current generation in solids

Triplons are elementary spin excitations characteristic of dimerized magnets, carrying a spin angular momentum one. Here, the authors report evidence for spin current of triplons via thermal transport measurements in a spin-dimer compound CuGeO₃.

Yao Chen
Masahiro Sato
Eiji Saitoh
ResearchOpen Access31 Aug 2021
Nature Communications

Volume: 12, P: 1-7
Gapless spin liquid in a square-kagome lattice antiferromagnet

There exist many theoretical models of frustrated quantum magnetism, most of which lack convincing experimental realisations. Here the authors combine several experimental methods to argue that KCu₆AlBiO₄(SO₄)₅Cl behaves as a square-kagome-lattice quantum Heisenberg antiferromagnet.

Masayoshi Fujihala
Katsuhiro Morita
Kenji Nakajima
ResearchOpen Access09 Jul 2020
Nature Communications

Volume: 11, P: 1-7
Arterial Angiogenesis in Kawasaki Disease. A Histologic Three-dimensional Reconstructive Study of a Small Artery with Many Branches

Hirotake Masuda
Xuefei Hong
Shiro Naoe
Research01 Jan 2003
Pediatric Research

Volume: 53, P: 174
Assigned Cotactic Parameters in the Radical Copolymerization of Methyl Methacrylate with Various Methacrylates

Koichi Hatada
Tatsuki Kitayama
Heimei Yuki
Research01 Sept 1987
Polymer Journal

Volume: 19, P: 1105-1113

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