1
|
Maekawa M, Yoshii E, Akase Y, Huang H, Yoshikawa S, Matsuda M, Kuruma Y, Sawayama E. Sex-Associated SNP Confirmation of Sex-Reversed Male Farmed Japanese Flounder Paralichthys olivaceus. Mar Biotechnol (NY) 2023; 25:718-728. [PMID: 37541964 DOI: 10.1007/s10126-023-10235-2] [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] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 07/21/2023] [Indexed: 08/06/2023]
Abstract
Female Japanese flounder Paralichthys olivaceus grow more rapidly than the male. The goal of all-female commercial production requires an efficient method of genetic sex identification. We conducted genome-wide association analysis of female and male farmed Japanese flounder (n = 24 per phenotypic sex) and found all regions of chromosome 24 to be significantly associated with phenotypic sex, suggesting it as the sex chromosome. Genetic sex was identified based on single nucleotide polymorphisms (SNP) on chromosome 24 (n = 3568) using multidimensional scaling analysis, and individuals were clearly separated according to sex by the first dimension. The 61 SNPs most highly associated with sex were selected, and an amplicon-based SNP panel was developed. This was used to determine genetic sex of 39 females and 40 males. Eleven phenotypic males were assigned as female with XX genotype, suggesting sex reversal. Genetic sex was also assessed based on the indel of the amh gene promoter, which is the major candidate sex gene of Japanese flounder. We found four SNPs perfectly associated with genotypic sex in the sex-associated SNP panel, one of which was located in exon 2 of the amh gene. Along with the indel of the amh gene promoter, the sex-associated SNP panel will be of value in identifying genetic sex of farmed Japanese flounder. Molecular sexing will facilitate all-female production by breeding sex-reversed males.
Collapse
Affiliation(s)
- Mari Maekawa
- Department of Marine Science, College of Bioresource Sciences, Nihon University, Kanagawa, Japan
| | - Emiri Yoshii
- Department of Marine Science, College of Bioresource Sciences, Nihon University, Kanagawa, Japan
| | - Yuri Akase
- R&D Division, Marua Suisan Co., Ltd., Ehime, Japan
| | - He Huang
- Bioengineering Lab. Co., Ltd., Kanagawa, Japan
| | - Sota Yoshikawa
- Nagasaki Prefectural Institute of Fisheries, Nagasaki, Japan
| | | | - Yosuke Kuruma
- Nagasaki Prefectural Institute of Fisheries, Nagasaki, Japan
| | - Eitaro Sawayama
- Department of Marine Science, College of Bioresource Sciences, Nihon University, Kanagawa, Japan.
| |
Collapse
|
2
|
Shinozaki Y, Fukui K, Maekawa M, Toyoda K, Yoshiuchi H, Inagaki K, Uno K, Miyajima K, Ohta T. Unilateral nephrectomized SHR/NDmcr-cp rat shows a progressive decline of glomerular filtration with tubular interstitial lesions. Physiol Res 2023; 72:209-220. [PMID: 37159855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023] Open
Abstract
In patients with diabetic kidney disease (DKD), the estimated glomerular filtration rate (eGFR) or creatinine clearance rate (Ccr) is always used as an index of decline in renal function. However, there are few animal models of DKD that could be used to evaluate renal function based on GFR or Ccr. For this reason, it is desirable to develop animal models to assess renal function, which could also be used for the evaluation of novel therapeutic agents for DKD. Therefore, we aimed to develop such animal model of DKD by using spontaneously hypertensive rat (SHR)/NDmcr-cp (cp/cp) rats with the characteristics of obese type 2 diabetes and metabolic syndrome. As a result, we have found that unilateral nephrectomy (UNx) caused a chronic Ccr decline, development of glomerular sclerosis, tubular lesions, and tubulointerstitial fibrosis, accompanied by renal anemia. Moreover, losartan-mixed diet suppressed the Ccr decline in UNx-performed SHR/NDmcr-cp rats (UNx-SHR/cp rats), with improvement in renal anemia and histopathological changes. These results suggest that UNx-SHR/cp rats could be used as a DKD model for evaluating the efficacy of therapeutic agents based on suppression of renal function decline.
Collapse
Affiliation(s)
- Y Shinozaki
- Laboratory of Animal Physiology and Functional Anatomy, Graduate School of Agriculture, Kyoto University, Kyoto, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
3
|
Maekawa M, Maekawa T, Sasase T, Takagi K, Takeuchi S, Kitamoto M, Nakagawa T, Toyoda K, Konishi N, Ohta T, Yamada T. Pathophysiological Analysis of Uninephrectomized db/db Mice as a Model of Severe Diabetic Kidney Disease. Physiol Res 2022; 71:209-217. [DOI: 10.33549/physiolres.934784] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Diabetic nephropathy, included in diabetic kidney disease (DKD), is the primary disease leading to end-stage renal disease (ESRD) or dialysis treatment, accounting for more than 40% of all patients with ESRD or receiving dialysis. Developing new therapeutics to prevent the transition to ESRD or dialysis treatment requires an understanding of the pathophysiology of DKD and an appropriate animal model for drug efficacy studies. In this study, we investigated the pathophysiology of diabetic kidney disease with type 2 diabetes in uninephrectomized db/db mice. In addition, the nephrectomized db/db mice from 10 weeks to 42 weeks were used to assess the efficacy of long-term administration of the angiotensin-II–receptor antagonist losartan. The blood and urinary biochemical parameters and the blood pressure which is a main pharmacological endpoint of the losartan therapy, were periodically measured. And at the end, histopathological analysis was performed. Uninephrectomized db/db mice clearly developed obesity and hyperglycemia from young age. Furthermore, they showed renal pathophysiological changes, such as increased urinary albumin-creatinine ratio (UACR) (the peak value 3104±986 in 40-week-old mice), glomerular hypertrophy and increased fibrotic areas in the tubulointerstitial tubules. The blood pressure in the losartan group was significantly low compared to the normotensive Vehicle group. However, as expected, Losartan suppressed the increase in UACR (829±500) indicating the medication was sufficient, but the histopathological abnormalities including tubular interstitial fibrosis did not improve. These results suggest that the uninephrectomized db/db mice are useful as an animal model of the severe DKD indicated by the comparison of the efficacy of losartan in this model with the efficacy of losartan in clinical practice.
Collapse
Affiliation(s)
| | - T Maekawa
- Biological/Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., Osaka, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
4
|
Miyashita A, Maekawa M, Shimoyama Y, Seko N, Kawasuso A, Umetsu RY. High-density magnetic-vacancy inclusion in Co 2MnGa single crystal probed by spin-polarized positron annihilation spectroscopy. J Phys Condens Matter 2021; 34:045701. [PMID: 34695811 DOI: 10.1088/1361-648x/ac3304] [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] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
Co2MnGa is a Weyl semimetal exhibiting giant anomalous Hall and Nernst effects. Using spin-polarized positron annihilation spectroscopy, we examined a Bridgman-grown Co2MnGa single crystal with a nearly perfectL21-ordered structure and a reference Co2MnAl polycrystal with a Mn-Al-disorderedB2 structure. We found that a large amount of magnetic vacancies (more than 100 ppm) were included in the Co2MnGa crystal but not the Co2MnAl crystal. We discuss possible reasons for the inclusion of vacancies, the role of vacancies in the development of the ordered structure, and the electronic states associated with the vacancies. Toward the development of Co2MnGa-based devices, the manners for reducing vacancies as well as the influence of vacancies on the electrical transport properties should be considered.
Collapse
Affiliation(s)
- A Miyashita
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - M Maekawa
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - Y Shimoyama
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - N Seko
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - A Kawasuso
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - R Y Umetsu
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai, Miyagi 980-8577, Japan
| |
Collapse
|
5
|
Maekawa M, Miyashita A, Sakai S, Li S, Entani S, Kawasuso A, Sakuraba Y. Spin-Polarized Positronium Time-of-Flight Spectroscopy for Probing Spin-Polarized Surface Electronic States. Phys Rev Lett 2021; 126:186401. [PMID: 34018791 DOI: 10.1103/physrevlett.126.186401] [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] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 03/25/2021] [Indexed: 06/12/2023]
Abstract
The energy spectrum of positronium atoms generated at a solid surface reflects the electron density of states (DOS) associated solely with the first surface layer. Using spin-polarized positrons, the spin-dependent surface DOS can be studied. For this purpose, we have developed a spin-polarized positronium time-of-flight spectroscopy apparatus based on a ^{22}Na positron source and an electrostatic beam transportation system, which enables the sampling of topmost surface electrons around the Γ point and near the Fermi level. We applied this technique to nonmagnetic Pt(111) and W(001), ferromagnetic Ni(111), Co(0001) and graphene on them, Co_{2}FeGa_{0.5}Ge_{0.5} (CFGG) and Co_{2}MnSi (CMS). The results showed that the electrons of Ni(111) and Co(0001) surfaces have characteristic negative spin polarizations, while these spin polarizations vanished upon graphene deposition, suggesting that the spin polarizations of graphene on Ni(111) and Co(0001) were mainly induced at the Dirac points that were out of range in the present measurement. The CFGG and CMS surfaces also exhibited only weak spin polarizations suggesting that the half-metallicity expected for these bulk states was not maintained at the surfaces.
Collapse
Affiliation(s)
- M Maekawa
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - A Miyashita
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - S Sakai
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - S Li
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - S Entani
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - A Kawasuso
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - Y Sakuraba
- National Institute for Materials Science (NIMS), 1-2-1, Sengen, Tsukuba-city, Ibaraki 305-0047, Japan
| |
Collapse
|
6
|
Kawasuso A, Wada K, Miyashita A, Maekawa M, Iwamori H, Iida S, Nagashima Y. Positronium formation at 4H SiC(0001) surfaces. J Phys Condens Matter 2020; 33:035006. [PMID: 33017809 DOI: 10.1088/1361-648x/abbe7a] [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] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 10/05/2020] [Indexed: 06/11/2023]
Abstract
Positronium formation at 4H SiC(0001) surfaces were investigated upon the removal of natural oxide layers by hydrofluoric acid etching and heat treatment at 1000 K in ultra-high vacuum. Two types of positronium were observed in the positronium time-of-flight (PsTOF) measurements irrespective of conduction type and surface polarity. One type formed the major part of the PsTOF spectrum with a maximum energy of 4.7 ± 0.3 eV. This energy exceeded the theoretical value calculated with valence electrons. The PsTOF spectrum shape was different from those of metal surfaces, suggesting that the surface state electrons or conduction electrons need to be considered as the positronium source. Another positronium appeared at 1000 K in the tail of the PsTOF spectrum with a maximum energy of 0.2-0.5 eV. This thermally-assisted athermal positronium may be formed via the surface state positrons and electrons.
Collapse
Affiliation(s)
- A Kawasuso
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - K Wada
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - A Miyashita
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - M Maekawa
- National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - H Iwamori
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - S Iida
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Y Nagashima
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| |
Collapse
|
7
|
Srivastava A, Chahar V, Sharma V, Acharya R, Ajith N, Swain KK, Knolle F, Maekawa M, Schnug E, Srivastava T. Quantification of multielements for mobilization study in water and sediments of Satluj River and Harike Wetland using Inductively Coupled Plasma Mass Spectrometry and Instrumental Neutron Activation Analysis. J Radioanal Nucl Chem 2020. [DOI: 10.1007/s10967-020-07276-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
8
|
Karayama M, Masuda J, Mori K, Yasui H, Hozumi H, Suzuki Y, Furuhashi K, Fujisawa T, Enomoto N, Nakamura Y, Inui N, Suda T, Maekawa M, Sugimura H, Takada A. Comprehensive assessment of multiple tryptophan metabolites as potential biomarkers for immune checkpoint inhibitors in patients with non-small cell lung cancer. Clin Transl Oncol 2020; 23:418-423. [PMID: 32533317 PMCID: PMC7854397 DOI: 10.1007/s12094-020-02421-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [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: 02/28/2020] [Accepted: 06/05/2020] [Indexed: 12/20/2022]
Abstract
Purpose Tryptophan metabolites have immunomodulatory functions, suggesting possible roles in cancer immunity. Methods Plasma tryptophan metabolites were measured using liquid chromatography/mass spectrometry before immune checkpoint inhibitors (ICIs) in patients with non-small cell lung cancer (NSCLC). Results The 19 patients with NSCLC had significantly lower levels of tryptophan (p = 0.002) and xanthurenic acid (p = 0.032), and a significantly higher level of 3-hydroxyanthranilic acid (3-HAA) (p = 0.028) compared with the 10 healthy volunteers. The patients achieving objective responses had significantly lower levels of 3-HAA than those who did not (p = 0.045). Receiver operating characteristic analyses determined that the cutoff value of 3-HAA for objective response was 35.4 pmol/mL (sensitivity: 87.5% and specificity: 83.3%). The patients with 3-HAA < 35.4 pmol/mL had significantly longer median progression-free survival (7.0 months) than those without (1.6 months, p = 0.022). Conclusions Tryptophan metabolites may have a potential for predicting the efficacy of ICIs. Registration number University Hospital Medical Information Network Clinical Trial Registry 000026140. Electronic supplementary material The online version of this article (10.1007/s12094-020-02421-8) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- M Karayama
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan.
| | - J Masuda
- Global Application Development Center, Shimadzu Corporation, 3801 Hadano, Kanagawa, 259-1034, Japan
| | - K Mori
- Department of Respiratory Medicine, Shizuoka City Shimizu Hospital, 1231 Miyakami, Shizuoka, 424-8636, Japan
| | - H Yasui
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - H Hozumi
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - Y Suzuki
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - K Furuhashi
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - T Fujisawa
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - N Enomoto
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - Y Nakamura
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - N Inui
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - T Suda
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - M Maekawa
- Department of Laboratory Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - H Sugimura
- Department of Tumor Pathology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192, Japan
| | - A Takada
- International Projects On Food and Health, Tokyo, Japan
| |
Collapse
|
9
|
Yamagami S, Adachi T, Sugimura T, Wada S, Kishimoto T, Maekawa M, Yoshimura R, Niwa M, Terano Y, Shaldon S. Detection of Endotoxin Antibody in Long-Term Dialysis Patients. Int J Artif Organs 2018. [DOI: 10.1177/039139889001300403] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Endotoxins are often seen in dialysate. They are derived from Gram-negative bacteria especially Pseudomonas, E. coli and Serratia. Endotoxins are large-molecular-weight substances with an average molecular weight of 108. These large units can be divided into subunits down to a molecular weight of 10,000 which are thought to pass through dialyzer membranes. To investigate this, endotoxin antibody levels were measured in two groups of patients on chronic regular hemodialysis, a low-flux group using cellulosic membrane dialyzers (cuprophanR and cuproammonium rayon (CAR) and a high-flux group using synthetic polymer membrane dialyzers (PMMA, EVAL). Using an ELISA based on standard endotoxin antibodies the percentages of patients in the low flux group with endotoxin antibodies were 26.9% with Cuprophan and 25% with CAR, not significantly different from a normal control group. In the PMMA and EVAL groups, it was 53.6% and 68.4% respectively. Back filtration of dialysate into blood is understood as the main reason for the entry of endotoxin in patients treated with high-flux dialyzers
Collapse
Affiliation(s)
- S. Yamagami
- Osaka City University Medical School, Osaka - Japan
- University Hospital Nimes, Montpellier- France
| | - T. Adachi
- Osaka City University Medical School, Osaka - Japan
- University Hospital Nimes, Montpellier- France
| | - T. Sugimura
- Osaka City University Medical School, Osaka - Japan
- University Hospital Nimes, Montpellier- France
| | - S. Wada
- Osaka City University Medical School, Osaka - Japan
- University Hospital Nimes, Montpellier- France
| | - T. Kishimoto
- Osaka City University Medical School, Osaka - Japan
- University Hospital Nimes, Montpellier- France
| | - M. Maekawa
- Osaka City University Medical School, Osaka - Japan
- University Hospital Nimes, Montpellier- France
| | - R. Yoshimura
- Osaka City University Medical School, Osaka - Japan
- University Hospital Nimes, Montpellier- France
| | - M. Niwa
- Osaka City University Medical School, Osaka - Japan
- University Hospital Nimes, Montpellier- France
| | - Y. Terano
- Osaka City University Medical School, Osaka - Japan
- University Hospital Nimes, Montpellier- France
| | - S. Shaldon
- Osaka City University Medical School, Osaka - Japan
- University Hospital Nimes, Montpellier- France
| |
Collapse
|
10
|
Himoto K, Suzuki S, Okubo T, Maekawa M, Kuroda-Sowa T. A new semiconducting 1D Cu(i)–Cu(ii) mixed-valence coordination polymer with Cu(ii) dimethylpiperidine–dithiocarbamate and a tetranuclear Cu(i)–Br cluster unit. NEW J CHEM 2018. [DOI: 10.1039/c7nj04763k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A new 1D semiconducting mixed-valence Cu(i)–Cu(ii) coordination polymer was synthesized and characterized using impedance measurements.
Collapse
Affiliation(s)
- K. Himoto
- Department of Chemistry
- Kindai University
- 3-4-1 Kowakae
- Higashi-Osaka
- Japan
| | - S. Suzuki
- Department of Chemistry
- Kindai University
- 3-4-1 Kowakae
- Higashi-Osaka
- Japan
| | - T. Okubo
- Department of Chemistry
- Kindai University
- 3-4-1 Kowakae
- Higashi-Osaka
- Japan
| | - M. Maekawa
- Research Institute for Science and Technology
- Kindai University
- 3-4-1 Kowakae
- Higashi-Osaka
- Japan
| | - T. Kuroda-Sowa
- Department of Chemistry
- Kindai University
- 3-4-1 Kowakae
- Higashi-Osaka
- Japan
| |
Collapse
|
11
|
Maekawa M, Watanabe A, Iwayama Y, Kimura T, Hamazaki K, Balan S, Ohba H, Hisano Y, Nozaki Y, Ohnishi T, Toyoshima M, Shimamoto C, Iwamoto K, Bundo M, Osumi N, Takahashi E, Takashima A, Yoshikawa T. Polyunsaturated fatty acid deficiency during neurodevelopment in mice models the prodromal state of schizophrenia through epigenetic changes in nuclear receptor genes. Transl Psychiatry 2017; 7:e1229. [PMID: 28872641 PMCID: PMC5639238 DOI: 10.1038/tp.2017.182] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/26/2017] [Accepted: 07/06/2017] [Indexed: 12/13/2022] Open
Abstract
The risk of schizophrenia is increased in offspring whose mothers experience malnutrition during pregnancy. Polyunsaturated fatty acids (PUFAs) are dietary components that are crucial for the structural and functional integrity of neural cells, and PUFA deficiency has been shown to be a risk factor for schizophrenia. Here, we show that gestational and early postnatal dietary deprivation of two PUFAs-arachidonic acid (AA) and docosahexaenoic acid (DHA)-elicited schizophrenia-like phenotypes in mouse offspring at adulthood. In the PUFA-deprived mouse group, we observed lower motivation and higher sensitivity to a hallucinogenic drug resembling the prodromal symptoms in schizophrenia. Furthermore, a working-memory task-evoked hyper-neuronal activity in the medial prefrontal cortex was also observed, along with the downregulation of genes in the prefrontal cortex involved in oligodendrocyte integrity and the gamma-aminobutyric acid (GABA)-ergic system. Regulation of these genes was mediated by the nuclear receptor genes Rxr and Ppar, whose promoters were hyper-methylated by the deprivation of dietary AA and DHA. In addition, the RXR agonist bexarotene upregulated oligodendrocyte- and GABA-related gene expression and suppressed the sensitivity of mice to the hallucinogenic drug. Notably, the expression of these nuclear receptor genes were also downregulated in hair-follicle cells from schizophrenia patients. These results suggest that PUFA deficiency during the early neurodevelopmental period in mice could model the prodromal state of schizophrenia through changes in the epigenetic regulation of nuclear receptor genes.
Collapse
Affiliation(s)
- M Maekawa
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan,Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. E-mail: or
| | - A Watanabe
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan
| | - Y Iwayama
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan
| | - T Kimura
- Department of Alzheimer's Disease Research, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Aichi, Japan
| | - K Hamazaki
- Department of Public Health, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - S Balan
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan
| | - H Ohba
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan
| | - Y Hisano
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan
| | - Y Nozaki
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan
| | - T Ohnishi
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan
| | - M Toyoshima
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan
| | - C Shimamoto
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan
| | - K Iwamoto
- Department of Molecular Brain Science, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - M Bundo
- Department of Molecular Brain Science, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - N Osumi
- Department of Developmental Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - E Takahashi
- Support Unit for Animal Resources Development, RIKEN Brain Science Institute, Saitama, Japan
| | - A Takashima
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan,Department of Life Sciences, Graduate School of Science, Gakushuin University, Tokyo, Japan
| | - T Yoshikawa
- Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan,Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. E-mail: or
| |
Collapse
|
12
|
Affiliation(s)
- Y. Naito
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, Japan
| | - M. Maekawa
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, Japan
| | - K. Shibuya
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, Japan
| |
Collapse
|
13
|
Sato R, Shirai K, Maekawa M, Genma R, Ohki S, Morita H, Suda T, Watanabe H. Glycaemia and autistic traits in very low birth weight infants in adulthood. Diabetes Metab 2016; 42:285-6. [PMID: 27037012 DOI: 10.1016/j.diabet.2016.02.005] [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] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 02/28/2016] [Indexed: 10/22/2022]
Affiliation(s)
- R Sato
- Department of Internal Medicine II, Hamamatsu University School of Medicine, 1-20-1 Handayama, 431-3192 Higashi-ku, Hamamatsu, Japan; Department of Endocrinology and Metabolism, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, 430-8558 Naka-ku, Hamamatsu, Japan; Pharmaceuticals and Medical Devices Agency, 3-3-2 Kasumigaseki, 100-0013 Chiyoda-ku, Tokyo, Japan.
| | - K Shirai
- Department of Neonatology, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, 430-8558 Naka-ku, Hamamatsu, Japan
| | - M Maekawa
- Department of Laboratory Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, 431-3192 Higashi-ku, Hamamatsu, Japan
| | - R Genma
- Department of Endocrinology and Metabolism, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, 430-8558 Naka-ku, Hamamatsu, Japan
| | - S Ohki
- Department of Neonatology, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, 430-8558 Naka-ku, Hamamatsu, Japan
| | - H Morita
- Department of Internal Medicine II, Hamamatsu University School of Medicine, 1-20-1 Handayama, 431-3192 Higashi-ku, Hamamatsu, Japan
| | - T Suda
- Department of Internal Medicine II, Hamamatsu University School of Medicine, 1-20-1 Handayama, 431-3192 Higashi-ku, Hamamatsu, Japan
| | - H Watanabe
- Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, 1-20-1 Handayama, 431-3192 Higashi-ku, Hamamatsu, Japan
| |
Collapse
|
14
|
Mochizuki I, Ariga H, Fukaya Y, Wada K, Maekawa M, Kawasuso A, Shidara T, Asakura K, Hyodo T. Structure determination of the rutile-TiO2(110)-(1 × 2) surface using total-reflection high-energy positron diffraction (TRHEPD). Phys Chem Chem Phys 2016; 18:7085-92. [DOI: 10.1039/c5cp07892j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Detailed structure of the rutile-TiO2(110)-(1 × 2) has been determined using the newly developed technique of total-reflection high-energy positron diffraction (TRHEPD).
Collapse
Affiliation(s)
- I. Mochizuki
- Institute of Materials Structure Science
- High Energy Accelerator Research Organization (KEK)
- Ibaraki 305-0801
- Japan
| | - H. Ariga
- Institute for Catalysis
- Hokkaido University
- Sapporo
- Japan
| | - Y. Fukaya
- Advanced Science Research Center
- Japan Atomic Energy Agency
- Naka
- Japan
| | - K. Wada
- Institute of Materials Structure Science
- High Energy Accelerator Research Organization (KEK)
- Ibaraki 305-0801
- Japan
| | - M. Maekawa
- Quantum Beam Science Directorate
- Japan Atomic Energy Agency
- Takasaki
- Japan
| | - A. Kawasuso
- Quantum Beam Science Directorate
- Japan Atomic Energy Agency
- Takasaki
- Japan
| | - T. Shidara
- Accelerator Laboratory
- High Energy Accelerator Research Organization (KEK)
- Tsukuba
- Japan
| | - K. Asakura
- Institute for Catalysis
- Hokkaido University
- Sapporo
- Japan
| | - T. Hyodo
- Institute of Materials Structure Science
- High Energy Accelerator Research Organization (KEK)
- Ibaraki 305-0801
- Japan
| |
Collapse
|
15
|
Abstract
The penetrance of schizophrenia risk in carriers of the 22q11.2 deletion is high but incomplete, suggesting the possibility of additional genetic defects. We performed whole exome sequencing on two individuals with 22q11.2 deletion, one with schizophrenia and the other who was psychosis-free. The results revealed novel genetic variants related to neuronal function exclusively in the person with schizophrenia (frameshift: KAT8, APOH and SNX31; nonsense: EFCAB11 and CLVS2). This study paves the way towards a more complete understanding of variant dose and genetic architecture in schizophrenia.
Collapse
Affiliation(s)
- S Balan
- S. Balan, PhD, Y. Iwayama, MS, T. Toyota, MD, PhD, M. Toyoshima, PhD, M. Maekawa, MD, PhD, T. Yoshikawa, MD, PhD, Laboratory for Molecular Psychiatry, RIKEN Brain Science Institute, Saitama, Japan
| | | | | | | | | | | |
Collapse
|
16
|
Sakiyama Y, Shibata S, Sanayama H, Ono S, Maekawa M, Matsuo M, Irie T, Eto Y. Intrathecal 2-Hydroxypropyl-Beta-Cyclodextrin (HPBCD) therapy in adult-onset Niemann-Pick Disease Type C (NPC). J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
17
|
Li H, Maekawa M, Kawasuso A, Tanimura N. Effect of magnetic field on positron lifetimes of Fe, Co and Ni. J Phys Condens Matter 2015; 27:246001. [PMID: 26037478 DOI: 10.1088/0953-8984/27/24/246001] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Positron lifetime spectra of Fe, Co and Ni were measured under magnetic field using a (22)Na source. Very small but distinguishable difference of positron lifetime upon magnetic field reversal was observed suggesting the existence of two bulk lifetimes associated with majority and minority spin electrons. Using two spin-dependent Fe bulk lifetimes, the difference Doppler broadening of annihilation radiation spectra between majority and minority spin electrons were also examined. Agreement between experiment and theory indicates that spin-polarized positron annihilation spectroscopy may have potential in investigation of spin-aligned electron momentum distribution.
Collapse
Affiliation(s)
- H Li
- Advanced Science Research Center, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma JP-370-1292, Japan
| | | | | | | |
Collapse
|
18
|
Zhang HJ, Yamamoto S, Gu B, Li H, Maekawa M, Fukaya Y, Kawasuso A. Charge-to-Spin Conversion and Spin Diffusion in Bi/Ag Bilayers Observed by Spin-Polarized Positron Beam. Phys Rev Lett 2015; 114:166602. [PMID: 25955066 DOI: 10.1103/physrevlett.114.166602] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Indexed: 06/04/2023]
Abstract
Charge-to-spin conversion induced by the Rashba-Edelstein effect was directly observed for the first time in samples with no magnetic layer. A spin-polarized positron beam was used to probe the spin polarization of the outermost surface electrons of Bi/Ag/Al2O3 and Ag/Bi/Al2O3 when charge currents were only associated with the Ag layers. An opposite surface spin polarization was found between Bi/Ag/Al2O3 and Ag/Bi/Al2O3 samples with the application of a charge current in the same direction. The surface spin polarizations of both systems decreased exponentially with the outermost layer thickness, suggesting the occurrence of spin diffusion from the Bi/Ag interface to the outermost surfaces. This work provides a new technique to measure spin diffusion length.
Collapse
Affiliation(s)
- H J Zhang
- Advanced Science Research Center, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - S Yamamoto
- Quantum Beam Science Directorate, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - B Gu
- Advanced Science Research Center, Japan Atomic Energy Agency, 2-4 Shirakata Shirane, Tokai-mura, Ibaraki 319-1195, Japan
| | - H Li
- Advanced Science Research Center, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - M Maekawa
- Advanced Science Research Center, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - Y Fukaya
- Advanced Science Research Center, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| | - A Kawasuso
- Advanced Science Research Center, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
| |
Collapse
|
19
|
Kishimoto T, Ezaki K, Yamagami S, Maekawa M. Glucose tolerance and erythrocyte insulin receptors in undialyzed patients and patients on maintenance hemodialysis and hemofiltration. Contrib Nephrol 2015; 32:97-110. [PMID: 6751689 DOI: 10.1159/000406911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
20
|
Ito T, Aoshima M, Sugiura K, Fujiyama T, Ito N, Sakabe JI, Akiyama M, Maekawa M, Tokura Y. Pustular psoriasis-like lesions associated with hereditary lactate dehydrogenase M subunit deficiency without interleukin-36 receptor antagonist mutation: long-term follow-up of two cases. Br J Dermatol 2015; 172:1674-1676. [PMID: 25640002 DOI: 10.1111/bjd.13590] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- T Ito
- Department of Dermatology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan
| | - M Aoshima
- Department of Dermatology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan
| | - K Sugiura
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Fujiyama
- Department of Dermatology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan
| | - N Ito
- Department of Dermatology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan
| | - J I Sakabe
- Department of Dermatology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Maekawa
- Department of Laboratory Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan
| | - Y Tokura
- Department of Dermatology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan
| |
Collapse
|
21
|
Tokura Y, Yagi H, Yanaguchi H, Majima Y, Kasuya A, Ito T, Maekawa M, Hashizume H. IgG4‐related skin disease. Br J Dermatol 2014; 171:959-67. [DOI: 10.1111/bjd.13296] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/14/2014] [Indexed: 12/15/2022]
Affiliation(s)
- Y. Tokura
- Department of Dermatology Hamamatsu University School of Medicine 1‐20‐1 Handayama Higashi‐ku Hamamatsu 431‐3192 Japan
| | - H. Yagi
- Section of Dermatology Shizuoka General Hospital 4‐27‐1 Kita‐Andou Aoi‐ku Shizuoka 420‐8527 Japan
| | - H. Yanaguchi
- Department of Dermatology Hamamatsu University School of Medicine 1‐20‐1 Handayama Higashi‐ku Hamamatsu 431‐3192 Japan
| | - Y. Majima
- Section of Dermatology Shizuoka General Hospital 4‐27‐1 Kita‐Andou Aoi‐ku Shizuoka 420‐8527 Japan
| | - A. Kasuya
- Department of Dermatology Hamamatsu University School of Medicine 1‐20‐1 Handayama Higashi‐ku Hamamatsu 431‐3192 Japan
| | - T. Ito
- Department of Dermatology Hamamatsu University School of Medicine 1‐20‐1 Handayama Higashi‐ku Hamamatsu 431‐3192 Japan
| | - M. Maekawa
- Laboratory Medicine Hamamatsu University School of Medicine 1‐20‐1 Handayama Higashi‐ku Hamamatsu 431‐3192 Japan
| | - H. Hashizume
- Section of Dermatology Shimada Municipal Hospital 1200‐5 Noda Shimada 427‐8502 Japan
| |
Collapse
|
22
|
Takahashi M, Saito T, Ito M, Tsukada C, Katono Y, Hosono H, Maekawa M, Shimada M, Mano N, Oda A, Hirasawa N, Hiratsuka M. Functional characterization of 21 CYP2C19 allelic variants for clopidogrel 2-oxidation. Pharmacogenomics J 2014; 15:26-32. [PMID: 25001882 DOI: 10.1038/tpj.2014.30] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 03/30/2014] [Accepted: 05/22/2014] [Indexed: 11/09/2022]
Abstract
Genetic variations in cytochrome P450 2C19 (CYP2C19) contribute to interindividual variability in the metabolism of therapeutic agents such as clopidogrel. Polymorphisms in CYP2C19 are associated with large interindividual variations in the therapeutic efficacy of clopidogrel. This study evaluated the in vitro oxidation of clopidogrel by 21 CYP2C19 variants harboring amino acid substitutions. These CYP2C19 variants were heterologously expressed in COS-7 cells, and the kinetic parameters of clopidogrel 2-oxidation were estimated. Among the 21 CYP2C19 variants, 12 (that is, CYP2C19.5A, CYP2C19.5B, CYP2C19.6, CYP2C19.8, CYP2C19.9, CYP2C19.10, CYP2C19.14, CYP2C19.16, CYP2C19.19, CYP2C19.22, CYP2C19.24 and CYP2C19.25) showed no or markedly low activity compared with the wild-type protein CYP2C19.1B. This comprehensive in vitro assessment provided insights into the specific metabolic activities of CYP2C19 proteins encoded by variant alleles, and this may to be valuable when interpreting the results of in vivo studies.
Collapse
Affiliation(s)
- M Takahashi
- Laboratory of Pharmacotherapy of Life-Style Related Diseases, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - T Saito
- Laboratory of Pharmacotherapy of Life-Style Related Diseases, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - M Ito
- Laboratory of Pharmacotherapy of Life-Style Related Diseases, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - C Tsukada
- Laboratory of Pharmacotherapy of Life-Style Related Diseases, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Y Katono
- Laboratory of Pharmacotherapy of Life-Style Related Diseases, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - H Hosono
- Laboratory of Pharmacotherapy of Life-Style Related Diseases, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - M Maekawa
- Department of Pharmacy, Tohoku University Hospital, Sendai, Japan
| | - M Shimada
- Department of Pharmacy, Tohoku University Hospital, Sendai, Japan
| | - N Mano
- Department of Pharmacy, Tohoku University Hospital, Sendai, Japan
| | - A Oda
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - N Hirasawa
- Laboratory of Pharmacotherapy of Life-Style Related Diseases, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - M Hiratsuka
- Laboratory of Pharmacotherapy of Life-Style Related Diseases, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| |
Collapse
|
23
|
Fukaya Y, Maekawa M, Mochizuki I, Wada K, Hyodo T, Kawasuso A. Reflection high-energy positron diffraction study on the first surface layer. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/505/1/012005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
24
|
Hyodo T, Fukaya Y, Maekawa M, Mochizuki I, Wada K, Shidara T, Ichimiya A, Kawasuso A. Total reflection high-energy positron diffraction (TRHEPD). ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/505/1/012001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
25
|
Shiota E, Maekawa M, Kono T. Analysis of the levels of endotoxin and β-d-glucan in the synovial fluid of hemodialysis patients. Mod Rheumatol 2014; 11:304-7. [DOI: 10.3109/s10165-001-8060-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
26
|
Wada K, Hyodo T, Kosuge T, Saito Y, Ikeda M, Ohsawa S, Shidara T, Michishio K, Tachibana T, Terabe H, Suzuki RH, Nagashima Y, Fukaya Y, Maekawa M, Mochizuki I, Kawasuso A. New experiment stations at KEK Slow Positron Facility. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/443/1/012082] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
27
|
Toyama Y, Chen C, Yamatoya K, Maekawa M, Ito C, Toshimori K. Unique structures of organelles observed in primary spermatocytes after micro-injection of protein solutions such as immunoglobulin into the lumen of the seminiferous tubules in mice and rats. Andrologia 2012; 45:402-8. [PMID: 23113831 DOI: 10.1111/and.12030] [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] [Accepted: 08/28/2012] [Indexed: 11/30/2022] Open
Abstract
Unique membranous structures of intracytoplasmic organelle, sting of a stack of a few flat cisternae about 50 nm in thickness, were found in mouse and rat spermatocytes after micro-injection of immunoglobulin G into the lumina of the seminiferous tubules. Other proteins such as BSA and cytochrome c used in this study also induced the structures. In most cases, the stacks of cisternae were rolled up like cigars or cylinders. The structures varied in length and diameter, the largest one observed in this study being 10.7 μm in length. The structures did not appear when the testes were fixed just after micro-injection and were formed transiently: they were observed in the spermatocytes fixed between 1 and 4 h after injection. Cytochrome c, micro-injected as an inter-cellular tracer, was visualised by a diaminobenzidine reaction. As the reaction product was not contained in the cisternae of the unique structures, the lumen of the cisternae of the organelles was not continuous with the inter-cellular space. A flocculent material of low density was observed in the cisternae of the organelle. Similar material was observed in the lumina of solitary cisternae of the rough endoplasmic reticulum in the spermatocytes, suggesting that the structures derived from endoplasmic reticulum.
Collapse
Affiliation(s)
- Y Toyama
- Department of Anatomy and Developmental Biology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | | | | | | | | | | |
Collapse
|
28
|
Toyosima M, Maekawa M, Toyota T, Iwayama Y, Arai M, Ichikawa T, Miyashita M, Arinami T, Itokawa M, Yoshikawa T. Schizophrenia with the 22q11.2 deletion and additional genetic defects: case history. Br J Psychiatry 2011; 199:245-6. [PMID: 21881099 DOI: 10.1192/bjp.bp.111.093849] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [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: 11/23/2022]
Abstract
The 22q11.2 deletion is the most prominent known genetic risk factor for schizophrenia, but its penetrance is at most approximately 50% suggesting that additional risk factors are required for disease progression. We examined a woman with schizophrenia with this deletion for such risk factors. She had high plasma pentosidine levels ('carbonyl stress') and a frameshift mutation in the responsible gene, GLO1. She also had a constant exotropia, so we examined the PHOX2B gene associated with both schizophrenia and strabismus, and detected a 5-alanine deletion. We propose that the combination of these genetic defects may have exceeded the threshold for the manifestation of schizophrenia.
Collapse
Affiliation(s)
- M Toyosima
- Laboratory for Molecular Psychiatry RIKEN Brain Science Institute, 2-1 Hirosawa, Wako-city, Saitama 351-0198, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Maekawa M, Ito C, Toyama Y, Suzuki-Toyota F, Fujita E, Momoi T, Toshimori K. Localisation of RA175 (Cadm1), a cell adhesion molecule of the immunoglobulin superfamily, in the mouse testis, and analysis of male infertility in the RA175-deficient mouse. Andrologia 2011; 43:180-8. [PMID: 21486398 DOI: 10.1111/j.1439-0272.2010.01049.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
RA175, a member of the immunoglobulin superfamily, plays an important role in cell adhesion, and RA175 gene-deficient mice (RA175(-/-) ) show oligoastheno-teratozoospermia. To understand the function of RA175, location in the testis and the morphological features of its spermatogenic cells in RA175(-/-) mice were investigated. Immunohistochemical studies revealed that RA175 immunoreactivity was observed on the cell surface of the spermatogenic cells at specific stages. A strong reaction was detected from type A spermatogonia to pachytene spermatocytes at stage IV and from step 6 to step 16 spermatids during spermatogenesis. From pachytene spermatocytes at stage VI to step 4 spermatids, the reaction was not detected by the enzyme-labelled antibody method and was faintly detected by the indirect immunofluorescence method. Abnormal vacuoles in the seminiferous epithelium, showing exfoliation of germ cells, and ultrastructural abnormality of the elongate spermatids were revealed in the RA175(-/-) testes. Other members of the immunoglobulin superfamily such as basigin, nectin-2 and nectin-3, which have an important role in spermatogenesis, were immunohistochemically detected in the RA175(-/-) testis. These observations indicate a unique expression pattern of RA175 in the testis and provide clues regarding the mechanism of male infertility in the testis.
Collapse
Affiliation(s)
- M Maekawa
- Department of Anatomy and Developmental Biology, Graduate School of Medicine, Chiba University, Japan.
| | | | | | | | | | | | | |
Collapse
|
30
|
Hoshiba T, Maekawa M, Hirabuki S, Sasaki H, Asamoto A. Retroperitoneoscopic and Laparoscopic Resection of Para-Aortic Lymphnode Metastasis after Previous Abdominal Lymphadenectomy in Ovarian Cancer. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
31
|
Ito C, Akutsu H, Yao R, Kyono K, Suzuki-Toyota F, Toyama Y, Maekawa M, Noda T, Toshimori K. Oocyte activation ability correlates with head flatness and presence of perinuclear theca substance in human and mouse sperm. Hum Reprod 2009; 24:2588-95. [DOI: 10.1093/humrep/dep241] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
32
|
Takeshita A, Yamakage N, Shinjo K, Ono T, Hirano I, Nakamura S, Shigeno K, Tobita T, Maekawa M, Kiyoi H, Naoe T, Ohnishi K, Sugimoto Y, Ohno R. Erratum: CMC-544 (inotuzumab ozogamicin), an anti-CD22 immuno-conjugate of calicheamicin, alters the levels of target molecules of malignant B-cells. Leukemia 2009. [DOI: 10.1038/leu.2009.115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
33
|
Abstract
We investigated saccade performance and prefrontal hemodynamics in basketball players with different skill levels. Subjects were 27 undergraduate basketball players and 13 non-athlete undergraduates (control group: CON). The players were divided into two groups: those who had played in the National Athletic Meet during high school or played regularly (n=13, elite group: ELI) and those who were bench warmers (n=14, skilled group: SKI). Horizontal eye movement and oxy-, deoxy-, and total-hemoglobin (Hb) concentration in the prefrontal cortex during pro- and anti-saccade were measured using electro-oculography and near-infrared spectroscopy, respectively. Only error rate in anti-saccade was less in ELI (4.8+/-4.0%) than SKI (13.7+/-12.6%) and CON (13.9+/-8.3%) (p<0.05). In ELI alone, oxy- (-0.15+/-0.18 mmol*mm) and total-Hb (-0.12+/-0.15 mmol*mm) during anti-saccade decreased significantly compared with that during rest (p<0.05), while those in CON significantly increased (oxy-Hb: 0.17+/-0.15 mmol*mm, total-Hb: 0.14+/-0.14 mmol*mm) (p<0.05). These results suggest that inhibition of eye movement to a visual target changes from voluntary to automatic through the motor learning of basketball.
Collapse
Affiliation(s)
- K Fujiwara
- Department of Human Movement and Health, Kanazawa University, Japan.
| | | | | | | | | | | |
Collapse
|
34
|
Maekawa M, Kikuchi J, Kotani K, Nagao K, Odgerel T, Ueda K, Kawano M, Furukawa Y, Sakurabayshi I. Abstract: P367 A NOVEL MISSENSE MUTATION OF ABCA1 IN TRANSMEMBRANE ALPHA-HELIX IN A JAPANESE PATIENT WITH TANGIER DISEASE. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70662-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
35
|
Yuasa J, Toyama Y, Miyauchi T, Maekawa M, Yuasa S, Ito H. Specific localization of the basigin protein in human testes from normal adults, normal juveniles, and patients with azoospermia. Andrologia 2009. [DOI: 10.1111/j.1439-0272.2001.tb01499.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
36
|
Takeshita A, Yamakage N, Shinjo K, Ono T, Hirano I, Nakamura S, Shigeno K, Tobita T, Maekawa M, Kiyoi H, Naoe T, Ohnishi K, Sugimoto Y, Ohno R. CMC-544 (inotuzumab ozogamicin), an anti-CD22 immuno-conjugate of calicheamicin, alters the levels of target molecules of malignant B-cells. Leukemia 2009; 23:1329-36. [PMID: 19369961 DOI: 10.1038/leu.2009.77] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We studied the effect of CMC-544, the calicheamicin-conjugated anti-CD22 monoclonal antibody, used alone and in combination with rituximab, analyzing the quantitative alteration of target molecules, that is, CD20, CD22, CD55 and CD59, in Daudi and Raji cells as well as in cells obtained from patients with B-cell malignancies (BCM). Antibody inducing direct antiproliferative and apoptotic effect, complement-dependent cytotoxicity (CDC) and antibody-dependent cellular cytotoxicity (ADCC) were tested separately. In Daudi and Raji cells, the CDC effect of rituximab significantly increased within 12 h following incubation with CMC-544. The levels of CD22 and CD55 were significantly reduced (P<0.001 in both cells) after incubation with CMC-544, but CD20 level remained constant or increased for 12 h. Similar results were obtained in cells from 12 patients with BCM. The antiproliferative and apoptotic effect of CMC-544 were greater than that of rituximab. The ADCC of rituximab was not enhanced by CMC-544. Thus, the combination of CMC-544 and rituximab increased the in vitro cytotoxic effect in BCM cells, and sequential administration for 12 h proceeded by CMC-544 was more effective. The reduction of CD55 and the preservation of CD20 after incubation with CMC-544 support the rationale for the combined use of CMC-544 and rituximab.
Collapse
Affiliation(s)
- A Takeshita
- Department of Laboratory Medicine, Hamamatsu University School of Medicine, Higashi-ku, Hamamatsu, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Maekawa M, Hoshiba T, Hirabuki S. Laparoscopic Treatment of the Lymphocyst Infection after Retroperitoneoscopic Lymphadenectomy. J Minim Invasive Gynecol 2008. [DOI: 10.1016/j.jmig.2008.09.398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
38
|
Maekawa M, Matsumata M, Owada Y, Kontani M, Hara Y, Kawashima H, Kiso Y, Yuasa S, Osumi N. Polyunsaturated fatty acids promote proliferation of neural progenitor cells in the hippocampal dentate gyrus. Neurosci Res 2007. [DOI: 10.1016/j.neures.2007.06.334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
39
|
Takeshita A, Shinjo K, Naito K, Matsui H, Sahara N, Shigeno K, Horii T, Shirai N, Maekawa M, Ohnishi K, Naoe T, Ohno R. Efficacy of gemtuzumab ozogamicin on ATRA- and arsenic-resistant acute promyelocytic leukemia (APL) cells. Leukemia 2005; 19:1306-11. [PMID: 15920495 DOI: 10.1038/sj.leu.2403807] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Acute promyelocytic leukemia (APL) cells express a considerable level of CD33, which is a target of gemtuzumab ozogamicin (GO), and a significantly lower level of P-glycoprotein (P-gp). In this study, we examined whether GO was effective on all-trans retinoic acid (ATRA)- or arsenic trioxide (ATO)-resistant APL cells. Cells used were an APL cell line in which P-gp was undetectable (NB4), ATRA-resistant NB4 (NB4/RA), NB4 and NB4/RA that had been transfected with MDR-1 cDNA (NB4/MDR and NB4/RA/MDR, respectively), ATO-resistant NB4 (NB4/As) and blast cells from eight patients with clinically ATRA-resistant APL including two patients with ATRA- and ATO-resistant APL. The efficacy of GO was analyzed by (3)H-thymidine incorporation, the dye exclusion test and cell cycle distribution. GO suppressed the growth of NB4, NB4/RA and NB4/As cells in a dose-dependent manner. GO increased the percentage of hypodiploid cells significantly in NB4, NB4/RA and NB4/As cells, and by a limited degree in NB4/MDR and NB4/RA/MDR cells. Similar results were obtained using blast cells from the patients with APL. GO is effective against ATRA- or ATO-resistant APL cells that do not express P-gp, and the mechanism of resistance to GO is not related to the mechanism of resistance to ATRA or ATO in APL cells. Leukemia (2005) 19, 1306-1311. doi:10.1038/sj.leu.2403807; published online 26 May 2005.
Collapse
MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/analysis
- Aminoglycosides/pharmacology
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal, Humanized
- Arsenic Trioxide
- Arsenicals/pharmacology
- Cell Cycle
- Cell Proliferation/drug effects
- Drug Resistance, Neoplasm
- Gemtuzumab
- Humans
- Leukemia, Promyelocytic, Acute/drug therapy
- Leukemia, Promyelocytic, Acute/pathology
- Oxides/pharmacology
- Treatment Outcome
- Tretinoin/pharmacology
- Tumor Cells, Cultured
Collapse
Affiliation(s)
- A Takeshita
- Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Ohmichi K, Matsuno Y, Kadota T, Koda M, Maekawa M, Toyama Y, Komiyama M, Todaka E, Fukata H, Tatsugi Y, Kohno T, Mori C. [Relationship between exposure to formaldehyde and symptoms of irritation during human-dissection course at Chiba University]. Kaibogaku Zasshi 2004; 79:95-100. [PMID: 15532611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
|
41
|
Aizawa H, Sato Y, Maekawa M, Fujisawa H, Hirata T, Yuasa S. Development of the amygdalohypothalamic projection in the mouse embryonic forebrain. ACTA ACUST UNITED AC 2004; 208:249-64. [PMID: 15232736 DOI: 10.1007/s00429-004-0399-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/2004] [Indexed: 11/29/2022]
Abstract
The amygdalohypothalamic projection, a major component of the stria terminalis, is involved in the conduction of emotional and olfactory information integrated in the amygdala to the hypothalamus to elicit emotional reactions. Despite the extensive studies on functional aspects of the amygdaloid complex, developmental mechanisms of the amygdala and related structures are still poorly understood. To investigate the development of the amygdalohypothalamic projection in the mouse embryonic brain, carbocyanine dye was applied to the amygdala to label the growing axons anterogradely and to the hypothalamus to label the amygdaloid neurons retrogradely. The initial outgrowth of the stria terminalis was found to be as early as E11.5. The pathway crossed in a saddle over the internal capsule, another prominent connection in the developing forebrain of the mammalian embryo. Bipolar immature neurons were distributed along the stria terminalis at the telencephalo-diencephalic boundary, and the internal capsule was also surrounded by these cells. These cells expressed immunoreactivities to calretinin and the lot-1 antigen which has been shown to be involved in guidance of the developing lateral olfactory tract. Ultrastructural analysis revealed an adherens-like junction between the stria terminalis and the apposed cells, implying contact-mediated guidance. These results suggest that, in the development of the stria terminalis, the axonal outgrowth is guided by a mechanism similar to that of the developing lateral olfactory tract, a major amygdalopetal connection.
Collapse
Affiliation(s)
- H Aizawa
- Department of Anatomy and Developmental Biology, Chiba University Graduate School of Medicine, Chiba, Japan.
| | | | | | | | | | | |
Collapse
|
42
|
Matsuno Y, Kadota T, Koda M, Komiyama M, Maekawa M, Toyama Y, Tatsugi Y, Kohno T, Mori C. [The introduction of teaching assistant system by medical students during educational human dissection tour at Chiva University]. Kaibogaku Zasshi 2004; 79:35-9. [PMID: 15101176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
|
43
|
Takeshita A, Uehara A, Shinjo K, Naito K, Sahara N, Yamazaki K, Katoh H, Kamikawa T, Ohnishi K, Maekawa M, Hayashi H, Ohno R. Impairment of heart rate variability control during arsenic trioxide treatment for acute promyelocytic leukemia. Leukemia 2003; 18:647-8. [PMID: 14671633 DOI: 10.1038/sj.leu.2403248] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
44
|
Taguchi N, Kawabata M, Maekawa M, Maruo T, Dewata L. Influence of socio-economic background and antenatal care programmes on maternal mortality in Surabaya, Indonesia. Trop Med Int Health 2003; 8:847-52. [PMID: 12950671 DOI: 10.1046/j.1365-3156.2003.01101.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine the risk factors, such as socio-economic background, quality of antenatal care and availability of family planning, responsible for high maternal mortality in Surabaya, Indonesia. METHODS The study used a case-control design. Descriptive, bivariate and multivariate analyses were carried out, comparing 59 maternal deaths and 177 women survivors in the referral hospital, from 1996 to 1999. RESULTS The risk factors for maternal mortality were: living outside of Surabaya [odds ratio (OR) = 11.7, 95% confidence interval (CI) = 5.0-29.2], unemployment (OR = 4.4, 95% CI = 1.7-13.8), unavailability of toilet facilities (OR = 2.9, 95% CI = 1.0-7.7), <4 antenatal visits (OR = 2.5, 95% CI = 1.1-5.5) and initial visit to antenatal care facilities after the fourth month of pregnancy (OR = 3.0, 95% CI = 1.3-7.0). There was no significant association between maternal mortality and the availability of family planning. CONCLUSION Low socio-economic background and the availability of antenatal care have a significant influence on maternal mortality in Surabaya, Indonesia.
Collapse
Affiliation(s)
- N Taguchi
- International Center for Medical Research, Kobe University School of Medicine, Kobe, Japan.
| | | | | | | | | |
Collapse
|
45
|
Takeshita A, Shinjo K, Naito K, Matsui H, Shigeno K, Nakamura S, Horii T, Maekawa M, Kitamura K, Naoe T, Ohnishi K, Ohno R. P-glycoprotein (P-gp) and multidrug resistance-associated protein 1 (MRP1) are induced by arsenic trioxide (As(2)O(3)), but are not the main mechanism of As(2)O(3)-resistance in acute promyelocytic leukemia cells. Leukemia 2003; 17:648-50. [PMID: 12646961 DOI: 10.1038/sj.leu.2402851] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/biosynthesis
- ATP Binding Cassette Transporter, Subfamily B, Member 1/drug effects
- Antineoplastic Agents/pharmacology
- Arsenic Trioxide
- Arsenicals/pharmacology
- Drug Resistance, Neoplasm
- Gene Expression Regulation/drug effects
- Humans
- Leukemia, Promyelocytic, Acute/drug therapy
- Leukemia, Promyelocytic, Acute/metabolism
- Leukemia, Promyelocytic, Acute/pathology
- Oxides/pharmacology
- Tumor Cells, Cultured
Collapse
|
46
|
Horii T, Morita M, Kameno Y, Kanno T, Maekawa M. Comparison of a new system (Compactdry SCD) with conventional methods for quantitative urine cultures. Lett Appl Microbiol 2003; 35:499-503. [PMID: 12460432 DOI: 10.1046/j.1472-765x.2002.01236.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS Compactdry SCD, a new quantitative, ready-to-use and self-diffusible dry medium sheet urine culture system, was compared with conventional methods to evaluate the results of quantitative urine cultures. METHODS & RESULTS Compactdry SCD was tested on 25 urine specimens, and results compared with those of traditional culture methods. The results from Compactdry SCD analysis correlated well with those from the standard plate count (SPC) method. In fact, the correlation was stronger than that dipslide systems and SPC. Even low-count bacteriuria (< 103 cfu ml(-1) and mixed bacteriuria were detected by Compactdry SCD. CONCLUSIONS The Compactdry SCD system provides results comparable to those obtained by SPC: simple interpretation, ease of use, long-term storage and good sensitivity. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report suggesting that the Compactdry SCD system has many advantages over traditional quantitative urine culture methods and that it is both appropriate and practical for clinical use.
Collapse
Affiliation(s)
- T Horii
- Department of Laboratory Medicine and Group of Infection Control Research, Hamamatsu University School of Medicine, 1-20-1 Handa-yama, Hamamatsu 431-3192, Japan.
| | | | | | | | | |
Collapse
|
47
|
Hosoi I, Toyama Y, Maekawa M, Ito H, Yuasa S. Development of the blood-testis barrier in the mouse is delayed by neonatally administered diethylstilbestrol but not by beta-estradiol 3-benzoate. Andrologia 2002; 34:255-62. [PMID: 12220234 DOI: 10.1046/j.1439-0272.2002.00502.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A group of newborn mice were treated with 1 micro g dose-1 individual-1 of diethylstilbestrol (DES) on alternate days, from days 1 to 11 postnatally. Another group of mice were treated similarly with 125 ng dose-1 individual-1 of beta-estradiol 3-benzoate (E2B). The testes were sequentially examined up to 84 days of age using light and electron microscopy. Spermatogenic cells in the DES-treated mice differentiated normally from birth until 17 days of age, when they differentiated into pachytene spermatocytes and remained at this meiotic prophase for the next 10 days approximately. The cells then began to differentiate further, ultimately forming spermatozoa by 49 days of age. Confocal and electron microscopy showed that the blood-testis barrier did not form until 28 days of age in the DES-treated mice, and a delay in the functional maturation of this structure, as the blood-testis barrier, was confirmed by intercellular tracer experiments. The arrest of spermatogenesis at the meiotic prophase may have been attributable to the DES-induced defective formation of the blood-testis barrier. No delay of the blood-testis barrier formation was detected in the E2B-treated mice. Thus, DES and E2B, both of which are known as potent oestrogenic compounds, had different effects on the Sertoli cells.
Collapse
Affiliation(s)
- I Hosoi
- Graduate School of Medicine, Chiba University, Chiba, Japan
| | | | | | | | | |
Collapse
|
48
|
Horii T, Suzuki Y, Kimura T, Kanno T, Maekawa M. Intravenous catheter-related septic shock caused by Staphylococcus sciuri and Escherichia vulneris. Scand J Infect Dis 2002; 33:930-2. [PMID: 11868769 DOI: 10.1080/00365540110076750] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Staphylococcus sciuri and Escherichia vulneris were isolated concurrently in a blood sample from a patient with septic shock, which was probably associated with an indwelling catheter. Our results also showed that S. sciuri is an important reservoir of genetic determinants of beta-lactam resistance as a human pathogen carrying the mecA and beta-lactamase genes.
Collapse
Affiliation(s)
- T Horii
- Department of Laboratory Medicine, Hamamatsu University School of Medicine, Japan
| | | | | | | | | |
Collapse
|
49
|
Beauchemin KA, Maekawa M, Christensen DA. Effect of diet and parity on meal patterns of lactating dairy cows. Can J Anim Sci 2002. [DOI: 10.4141/a01-080] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Four multiparous and four primiparous lactating dairy cows housed in stalls were used in a double 4 × 4 Latin square to determine the effect of parity and diet on meal patterns. Cows were fed one of four diets: three total mixed rations containing 40, 50, or 60% barley silage on a dry matter (DM) basis, and a diet in which forage and concentrate were allocated separately (SI) containing 50% concentrate. Dry matter intake was similar for all diets (18.2 ± 0.6 kg d-1), as were the number of meals per day (10 ± 1 meals d-1) and meal duration (35 ± 3 min meal-1). Meal size was larger (5.2 vs. 1.1 or 1.9 kg DM meal-1), and eating rate was faster (0.265 vs. 0.053 or 0.034 kg DM min-1) when cows consumed concentrate, compared with silage or TMR, respectively. Meal size of TMR, silage or concentrate was positively related to DM intake (r = 0.82, 0.76, and 0.98; respectively). For cows consuming TMR, the number of meals per day was negatively related to DM intake (r = -0.41). Dry matter intake increased when meal size increased, primarily as a result of longer meals and, to a lesser extent, faster eating rate. Feeding management had little effect on meal patterns. Multiparous cows tended to eat more in each meal compared with primiparous cows, but both groups spent the same amount of time eating per meal. Key words: Cows, parity, meal patterns, feeding management
Collapse
|
50
|
Maekawa M, Beauchemin KA, Christensen DA. Effect of concentrate level and feeding management on chewing activities, saliva production, and ruminal pH of lactating dairy cows. J Dairy Sci 2002; 85:1165-75. [PMID: 12086052 DOI: 10.3168/jds.s0022-0302(02)74179-9] [Citation(s) in RCA: 172] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Eight ruminally cannulated lactating Holstein cows were used in a double 4 x 4 Latin square to determine the effects of 1) proportion of barley silage [40, 50, and 60% of dry matter (DM)] in the diet, and 2) feeding a total mixed ration (TMR) compared with separate ingredients (SI) on chewing activities, saliva production, and ruminal pH. Although cows fed SI were offered a diet containing 50% silage, they actually consumed a diet containing 43% silage (DM basis). Dry matter intake and milk yield were similar for all diets (18.2 kg of DM/d and 27.2 kg/d, respectively). Cows fed the 40% silage TMR spent more time eating than cows fed SI (243 vs. 198 min/d), but rumination time was similar (546 min/d). Eating time was similar among the TMR diets, but rumination time increased from 498 to 516 and 584 min/d as silage in the TMR increased from 40 to 50, and then to 60%, respectively. The secretion of saliva per gram of feed was 4.43, 3.18, and 1.19 ml/g of DM with consumption of silage, TMR, and concentrate, respectively. Resting salivation rate was similar for all diets (101 ml/min). Regardless of the diet, cows secreted 239 +/- 17 L/d of saliva, and ruminal pH was below 5.8 for 10 h/d. Results indicated increased chewing time did not increase total daily saliva secretion because increased eating and ruminating saliva was associated with decreased resting saliva. Feeding SI increased the risk of acidosis, because cows ate a higher proportion of concentrate than intended.
Collapse
Affiliation(s)
- M Maekawa
- Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Canada
| | | | | |
Collapse
|