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Yamamoto S, Sanefuji M, Suzuki M, Sonoda Y, Hamada N, Kato W, Ono H, Oba U, Nakashima K, Ochiai M, Kusuhara K, Koga Y, Ohga S. Pediatric leukemia and maternal occupational exposure to anticancer drugs: the Japan Environment and Children's Study. Blood 2024; 143:311-319. [PMID: 37788408 DOI: 10.1182/blood.2023021008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 08/22/2023] [Accepted: 09/04/2023] [Indexed: 10/05/2023] Open
Abstract
ABSTRACT Occupational exposure to medical agents and ionizing radiation has been suggested as a possible risk factor for childhood cancer. However, the relationship between such exposure and pediatric malignant neoplasms has not yet been comprehensively studied. This cohort study aimed to investigate the association between parental occupational exposure to hazardous medical agents or ionizing radiation and the risk of childhood cancer in offspring. Data from a large birth cohort in Japan, which included 104 062 fetuses, were analyzed. The primary outcome was the development of leukemia or brain tumors diagnosed by community physicians during the first 3 years after birth. Exposure factors were medical agents, including anticancer agents, ionizing radiation, and anesthetics, handled by mothers during pregnancy or by fathers for 3 months before conception. The incidence of leukemia, but not of brain tumors, was higher in mothers exposed to anticancer drugs. Multivariable regression analysis showed that maternal exposure to anticancer drugs was associated with an increased risk of leukemia in offspring older than 1 year (adjusted relative risk, 7.99 [95% confidence interval, 1.98-32.3]). Detailed information obtained from medical certificates of patients with identified leukemia revealed no infant leukemia but acute lymphoblastic leukemias in the exposed group. Our findings suggest that maternal occupational exposure to anticancer drugs may be a potential risk factor for acute lymphoblastic leukemia in offspring older than 1 year. Effective prevention methods may be necessary to prevent maternal exposure to anticancer drugs and to reduce the risk of childhood malignant neoplasms.
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Affiliation(s)
- Shunsuke Yamamoto
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masafumi Sanefuji
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Pediatrics, Faculty of Medicine, Saga University, Saga, Japan
| | - Maya Suzuki
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yuri Sonoda
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Norio Hamada
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Wakako Kato
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hiroaki Ono
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Utako Oba
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kentaro Nakashima
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Pediatrics, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Masayuki Ochiai
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Koichi Kusuhara
- Department of Pediatrics, University of Occupational and Environmental Health, Kitakyushu, Japan
- Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yuhki Koga
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Perinatal and Pediatric Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shouichi Ohga
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Kikuchi K, Michikawa T, Morokuma S, Hamada N, Suetsugu Y, Ikeda S, Nakahara K, Kato K, Ochiai M, Shibata E, Tsuji M, Shimono M, Kawamoto T, Ohga S, Kusuhara K. Sleep quality and temperament in association with autism spectrum disorder among infants in Japan. Commun Med (Lond) 2023; 3:82. [PMID: 37328542 DOI: 10.1038/s43856-023-00314-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 06/05/2023] [Indexed: 06/18/2023] Open
Abstract
BACKGROUND Sleep problems and irritable temperaments are common among infants with autism spectrum disorder (ASD). The prospective association between such sleep problems and irritable temperaments and ASDs needs to be determined for elucidating the mechanism and exploring the future intervention study. Thus, in this study, we investigated whether sleep quality and temperament in 1-month-old infants are associated with the onset of ASD in 3-year-old children. We also assessed its sex-stratified associations. METHODS We conducted a longitudinal study using data from 69,751 mothers and infants from a large-cohort study, the Japan Environment and Children's Study. We examined the prospective association between infant sleep quality and temperament at 1 month of age and ASD diagnosis by 3 years of age. RESULTS Here we show infants with longer daytime sleep have a higher risk of later ASD than those with shorter daytime sleep (risk ratio [RR]: 1.33, 95% confidence interval [CI]: 1.01-1.75). Infants who experienced intense crying have a higher risk of ASD than those who did not (RR: 1.31, 95% CI: 1.00-1.72). There is a difference in sex in the association between a bad mood and later ASD. In particular, female infants experiencing bad moods have a higher risk of ASD than others (RR: 3.59, 95% CI: 1.91-6.75). CONCLUSIONS The study findings provide important information for future intervention to reduce the risk of future ASD.
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Affiliation(s)
- Kimiyo Kikuchi
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takehiro Michikawa
- Department of Environmental and Occupational Health, School of Medicine, Toho University, Tokyo, Japan
| | - Seiichi Morokuma
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan.
| | - Norio Hamada
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yoshiko Suetsugu
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Subaru Ikeda
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kazushige Nakahara
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kiyoko Kato
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masayuki Ochiai
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Eiji Shibata
- Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan
- Department of Obstetrics and Gynecology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Mayumi Tsuji
- Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan
- Department of Environmental Health, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Masayuki Shimono
- Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
| | - Toshihiro Kawamoto
- Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Shouichi Ohga
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Koichi Kusuhara
- Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
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Iwaya Y, Sanefuji M, Nishiyama K, Sonoda Y, Hamada N, Suga R, Ochiai M, Shimono M, Kusuhara K, Ohga S. Prenatal metal levels and congenital anomalies of the kidney and urinary tract: The Japan Environment and Children's Study. Sci Total Environ 2023; 890:164356. [PMID: 37230340 DOI: 10.1016/j.scitotenv.2023.164356] [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: 02/09/2023] [Revised: 05/18/2023] [Accepted: 05/18/2023] [Indexed: 05/27/2023]
Abstract
BACKGROUND Prenatal exposure to metal elements has been reported as a potential risk factor for congenital malformation. However, studies on the relationship with congenital anomalies of the kidney and urinary tract (CAKUT) are very scarce. METHODS Participants of a prospective cohort from the Japan Environment and Children's Study, conducted at 15 research centers, were recruited between January 2011 and March 2014. The exposure factors were concentrations of lead (Pb), cadmium (Cd), mercury (Hg), selenium (Se), and manganese (Mn) measured from maternal whole blood in the second or third trimester. The primary outcome was CAKUT diagnosed during the first three years of life, which was classified into isolated cases and complicated cases accompanied by extrarenal congenital defects. To conduct a nested case-control design within the cohort, we selected 351 isolated cases with 1404 matched controls, and 79 complicated cases with 316 matched controls. RESULTS A logistic regression model was used to examine the associations between individual metal concentrations and each subtype of CAKUT. A higher level of Se was associated with an increased risk of isolated CAKUT (adjusted odds ratio [95 % confidence interval]: 3.22 [1.33-7.77]). Meanwhile, higher levels of Pb and Mn were associated with a reduced risk of the complicated subtype (0.46 [0.24-0.90] and 0.33 [0.15-0.73], respectively). A Bayesian kernel machine regression model accounting for mixed effects of multiple metals further demonstrated that a higher level of Mn alone was significantly associated with a reduced occurrence of the complicated subtype. CONCLUSIONS Using a stringent statistical approach, the present study demonstrated that a higher Mn concentration in the maternal blood was associated with a lower risk of complicated CAKUT in offspring. Further cohort and experimental studies are needed to verify the clinical impact of this finding.
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Affiliation(s)
- Yuka Iwaya
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masafumi Sanefuji
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Department of Pediatrics, Faculty of Medicine, Saga University, Saga, Japan.
| | - Kei Nishiyama
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
| | - Yuri Sonoda
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan.
| | - Norio Hamada
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan; Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
| | - Reiko Suga
- Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan.
| | - Masayuki Ochiai
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan.
| | - Masayuki Shimono
- Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan; Department of Pediatrics, University of Occupational and Environmental Health, Kitakyushu, Japan.
| | - Koichi Kusuhara
- Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan; Department of Pediatrics, University of Occupational and Environmental Health, Kitakyushu, Japan.
| | - Shouichi Ohga
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan.
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Murakami K, Hamazaki N, Hamada N, Nagamatsu G, Okamoto I, Ohta H, Nosaka Y, Ishikura Y, Kitajima TS, Semba Y, Kunisaki Y, Arai F, Akashi K, Saitou M, Kato K, Hayashi K. Generation of functional oocytes from male mice in vitro. Nature 2023; 615:900-906. [PMID: 36922585 DOI: 10.1038/s41586-023-05834-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 02/13/2023] [Indexed: 03/18/2023]
Abstract
Sex chromosome disorders severely compromise gametogenesis in both males and females. In oogenesis, the presence of an additional Y chromosome or the loss of an X chromosome disturbs the robust production of oocytes1-5. Here we efficiently converted the XY chromosome set to XX without an additional Y chromosome in mouse pluripotent stem (PS) cells. In addition, this chromosomal alteration successfully eradicated trisomy 16, a model of Down's syndrome, in PS cells. Artificially produced euploid XX PS cells differentiated into mature oocytes in culture with similar efficiency to native XX PS cells. Using this method, we differentiated induced pluripotent stem cells from the tail of a sexually mature male mouse into fully potent oocytes, which gave rise to offspring after fertilization. This study provides insights that could ameliorate infertility caused by sex chromosome or autosomal disorders, and opens the possibility of bipaternal reproduction.
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Affiliation(s)
- Kenta Murakami
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Nobuhiko Hamazaki
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Norio Hamada
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Go Nagamatsu
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Ikuhiro Okamoto
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiroshi Ohta
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yoshiaki Nosaka
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yukiko Ishikura
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Tomoya S Kitajima
- Laboratory for Chromosome Segregation, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Yuichiro Semba
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yuya Kunisaki
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Fumio Arai
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Koichi Akashi
- Department of Medicine and Biosystemic Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Mitinori Saitou
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Kiyoko Kato
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Katsuhiko Hayashi
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
- Department of Genome Biology, Graduate School of Medicine, Osaka University, Suita, Japan.
- Graduate School of Frontier Biosciences, Osaka University, Suita, Japan.
- Premium Research Institute for Human Metaverse Medicine (WPI-PRIMe), Osaka University, Suita, Japan.
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Yagi H, Onoyama I, Asanoma K, Kawakami M, Maenohara S, Kodama K, Matsumura Y, Hamada N, Hori E, Hachisuga K, Yasunaga M, Ohgami T, Okugawa K, Yahata H, Kato K. Tumor-derived ARHGAP35 mutations enhance the Gα 13-Rho signaling axis in human endometrial cancer. Cancer Gene Ther 2023; 30:313-323. [PMID: 36257976 DOI: 10.1038/s41417-022-00547-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 09/26/2022] [Accepted: 10/06/2022] [Indexed: 11/08/2022]
Abstract
Dysregulated G protein-coupled receptor signaling is involved in the formation and progression of human cancers. The heterotrimeric G protein Gα13 is highly expressed in various cancers and regulates diverse cancer-related transcriptional networks and cellular functions by activating Rho. Herein, we demonstrate that increased expression of Gα13 promotes cell proliferation through activation of Rho and the transcription factor AP-1 in human endometrial cancer. Of interest, the RhoGTPase activating protein (RhoGAP), ARHGAP35 is frequently mutated in human endometrial cancers. Among the 509 endometrial cancer samples in The Cancer Genome Atlas database, 108 harbor 152 mutations at 126 different positions within ARHGAP35, representing a somatic mutation frequency of 20.2%. We evaluated the effect of 124 tumor-derived ARHGAP35 mutations on Gα13-mediated Rho and AP-1 activation. The RhoGAP activity of ARHGAP35 was impaired by 55 of 124 tumor-derived mutations, comprised of 23 nonsense, 15 frame-shift, 15 missense mutations, and two in-frame deletions. Considering that ARHGAP35 is mutated in >2% of all tumors, it ranks among the top 30 most significantly mutated genes in human cancer. Our data suggest potential roles of ARHGAP35 as an oncogenic driver gene, providing novel therapeutic opportunities for endometrial cancer.
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Affiliation(s)
- Hiroshi Yagi
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
| | - Ichiro Onoyama
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kazuo Asanoma
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Minoru Kawakami
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shoji Maenohara
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Keisuke Kodama
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yumiko Matsumura
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Norio Hamada
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Emiko Hori
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kazuhisa Hachisuga
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masafumi Yasunaga
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Tatsuhiro Ohgami
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kaoru Okugawa
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hideaki Yahata
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kiyoko Kato
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Nishiyama K, Sanefuji M, Kurokawa M, Iwaya Y, Hamada N, Sonoda Y, Ogawa M, Shimono M, Suga R, Kusuhara K, Ohga S. Maternal Chronic Disease and Congenital Anomalies of the Kidney and Urinary Tract in Offspring: A Japanese Cohort Study. Am J Kidney Dis 2022; 80:619-628.e1. [PMID: 35439592 DOI: 10.1053/j.ajkd.2022.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 03/01/2022] [Indexed: 02/02/2023]
Abstract
RATIONALE & OBJECTIVE Several maternal chronic diseases have been reported as risk factors for congenital anomalies of the kidney and urinary tract (CAKUT) in offspring. However, these investigations used case-control designs, and cases with isolated genitourinary CAKUT were not distinguished from cases in which CAKUT were present with extrarenal congenital anomalies (complicated CAKUT). We examined the association of maternal diseases with isolated and complicated CAKUT in offspring using data from a prospective cohort study. STUDY DESIGN A nationwide prospective birth cohort study. SETTING & PARTICIPANTS 100,239 children enrolled in the Japan Environment and Children's Study between January 2011 and March 2014 at 15 research centers. Physicians' diagnoses in mothers and children were collected from medical record transcripts and questionnaires. EXPOSURES Medical histories of maternal noncommunicable diseases, including obesity, hypertension, diabetes mellitus, kidney disease, hyperthyroidism, hypothyroidism, psychiatric disease, epilepsy, cancer, and autoimmune disease. OUTCOMES CAKUT diagnosed during the first 3 years of life, classified as isolated or complicated. ANALYTICAL APPROACH Multivariable Poisson regression with generalized estimating equations accounting for clustering by clinical center. RESULTS Among the 100,239 children, 560 (0.6%) had CAKUT, comprising 454 (81%) isolated and 106 (19%) complicated forms. The risk of isolated CAKUT was increased in children of mothers who experienced kidney disease (adjusted risk ratio [RR], 1.80 [95% CI, 1.12-2.91]) or cancer (RR, 2.11 [95% CI, 1.15-3.86]). Furthermore, the risk of complicated CAKUT was increased in children of mothers with diabetes mellitus (RR, 3.04 [95% CI, 1.64-5.61]). LIMITATIONS Lack of standardization or prespecification of clinical definitions, diagnostic criteria, measurements, and testing. Genetic testing was not performed. CONCLUSIONS Isolated CAKUTs and complicated CAKUTs were associated with different maternal diseases. The results may inform clinical management of pregnancy and highlight potential differences in the genesis of isolated and complicated forms of CAKUT.
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Affiliation(s)
- Kei Nishiyama
- Departments of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masafumi Sanefuji
- Departments of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan.
| | - Mari Kurokawa
- Department of Pediatrics, Fukuoka Higashi Medical Center, Koga, Fukuoka, Japan
| | - Yuka Iwaya
- Departments of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Norio Hamada
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yuri Sonoda
- Departments of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masanobu Ogawa
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masayuki Shimono
- Department of Pediatrics, University of Occupational and Environmental Health, Kitakyushu, Japan; Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Reiko Suga
- Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Koichi Kusuhara
- Department of Pediatrics, University of Occupational and Environmental Health, Kitakyushu, Japan; Regional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Shouichi Ohga
- Departments of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
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7
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Severino J, Bauer M, Mattimoe T, Arecco N, Cozzuto L, Lorden P, Hamada N, Nosaka Y, Nagaoka SI, Audergon P, Tarruell A, Heyn H, Hayashi K, Saitou M, Payer B. Controlled X-chromosome dynamics defines meiotic potential of female mouse in vitro germ cells. EMBO J 2022; 41:e109457. [PMID: 35603814 PMCID: PMC9194795 DOI: 10.15252/embj.2021109457] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 04/08/2022] [Accepted: 04/14/2022] [Indexed: 11/23/2022] Open
Abstract
The mammalian germline is characterized by extensive epigenetic reprogramming during its development into functional eggs and sperm. Specifically, the epigenome requires resetting before parental marks can be established and transmitted to the next generation. In the female germline, X‐chromosome inactivation and reactivation are among the most prominent epigenetic reprogramming events, yet very little is known about their kinetics and biological function. Here, we investigate X‐inactivation and reactivation dynamics using a tailor‐made in vitro system of primordial germ cell‐like cell (PGCLC) differentiation from mouse embryonic stem cells. We find that X‐inactivation in PGCLCs in vitro and in germ cell‐competent epiblast cells in vivo is moderate compared to somatic cells, and frequently characterized by escaping genes. X‐inactivation is followed by step‐wise X‐reactivation, which is mostly completed during meiotic prophase I. Furthermore, we find that PGCLCs which fail to undergo X‐inactivation or reactivate too rapidly display impaired meiotic potential. Thus, our data reveal fine‐tuned X‐chromosome remodelling as a critical feature of female germ cell development towards meiosis and oogenesis.
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Affiliation(s)
- Jacqueline Severino
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Moritz Bauer
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Tom Mattimoe
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Niccolò Arecco
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Luca Cozzuto
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Patricia Lorden
- CNAG-CRG, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - Norio Hamada
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yoshiaki Nosaka
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan.,Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - So I Nagaoka
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan.,Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Pauline Audergon
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Antonio Tarruell
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Holger Heyn
- CNAG-CRG, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Katsuhiko Hayashi
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Mitinori Saitou
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan.,Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan
| | - Bernhard Payer
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain
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8
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Nakahara K, Michikawa T, Morokuma S, Hamada N, Ogawa M, Kato K, Sanefuji M, Shibata E, Tsuji M, Shimono M, Kawamoto T, Ohga S, Kusuhara K, Kamijima M, Yamazaki S, Ohya Y, Kishi R, Yaegashi N, Hashimoto K, Mori C, Ito S, Yamagata Z, Inadera H, Nakayama T, Iso H, Shima M, Kurozawa Y, Suganuma N, Katoh T. Association of physical activity and sleep habits during pregnancy with autistic spectrum disorder in 3-year-old infants. Commun Med 2022; 2:35. [PMID: 35603288 PMCID: PMC9053216 DOI: 10.1038/s43856-022-00101-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 03/11/2022] [Indexed: 12/19/2022] Open
Abstract
Background: We hypothesized that maternal lifestyle factors, such as physical activity and sleep habits, may be associated with autism spectrum disorder (ASD) in infants. This study aimed to investigate the association between maternal physical activity and sleep before and during pregnancy with infant ASD diagnosed by the age of 3 years. Methods: We used the data from the Japan Environment and Children’s Study between 2011 and 2014. The study included 103,060 pregnant women, among which, 69,969 women were analyzed. Participants were asked about their physical activity and sleep before and during pregnancy using questionnaires during pregnancy. Maternal physical activity was estimated using the international physical activity questionnaire. Based on the levels of physical activity before or during pregnancy, the participants were divided into five groups. Maternal sleep was analyzed based on sleep duration and bedtime. The outcome was diagnosis of ASD in 3-year-old infants. Results: In mothers with higher physical activity levels during pregnancy, the risk ratios (RR) for ASD in their 3-year-old infants were lower (RR = 0.61, 95% confidence interval (CI) = 0.42–0.90). In contrast, too short (<6 h) and too long (>10 h) sleep durations during pregnancy were associated with higher risk ratios for ASD than 7–8 h sleep duration (too short: RR = 1.87, 95% CI = 1.21–2.90; too long: RR = 1.56, 95% CI = 1.00–2.48). These associations were not observed before pregnancy. Conclusion: Maternal physical activity and sleep duration during pregnancy may be associated with ASD in infants. Children with autism spectrum disorder (ASD) have difficulties with communication and can have problematic behavior. It is unclear whether lifestyle habits before and during pregnancy influence the chances of having a child with ASD. We investigated whether maternal physical activity and particular sleep habits before and during pregnancy increased the likelihood of 3-year-old infants having ASD. Mothers completed questionnaires asking about their physical activity, sleep habits, and any diagnosis of ASD in their child. The children of mothers with high levels of physical activity during pregnancy were less likely to have ASD. The children of mothers who had slept for less than 6 h or longer than 10 h a night were more likely to have ASD. Thus, improving sleep and increasing exercise during pregnancy might reduce the risk of ASD in their children. Nakahara, Michikawa et al determined the physical activity and sleep habits of women before and during pregnancy and compared these with diagnoses of autism spectrum disorder in their offspring. Abnormal sleep and reduced physical activity during pregnancy were associated with a diagnosis of autism spectrum disorder.
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9
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Nakahara K, Michikawa T, Morokuma S, Hamada N, Ogawa M, Kato K, Sanefuji M, Shibata E, Tsuji M, Shimono M, Kawamoto T, Ohga S, Kusuhara K. Association of maternal hemoglobin levels during pregnancy with sleep and developmental problems in 1‐year‐old infants: A cohort study. Health Sci Rep 2022; 5:e552. [PMID: 35308415 PMCID: PMC8907744 DOI: 10.1002/hsr2.552] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 12/28/2021] [Accepted: 01/06/2022] [Indexed: 11/11/2022] Open
Abstract
Background and Aims Maternal hemoglobin concentration during pregnancy is reported to be associated with various perinatal outcomes and may also be associated with infant development. This study aims to investigate the association between maternal hemoglobin levels during early or mid‐pregnancy and sleep and developmental problems in 1‐year‐old infants. Methods We used the data of 66,935 pregnant women who were participants of the Japan Environment and Children's Study, a nationwide cohort study in Japan, between 2011 and 2014. Maternal hemoglobin level was examined at recruitment (mean gestational age, 15.3 weeks; SD, 2.85 weeks; range, 6–22 weeks). Information on infant sleep and development at the age of 1 year was acquired using a questionnaire. Infant development was evaluated using the Ages and Stages Questionnaire (ASQ). Results The mean (SD) maternal hemoglobin level was 12.0 (1.0) g/dl. Maternal hemoglobin levels were not associated with the majority of infant sleep and developmental outcomes. In the group with maternal hemoglobin <10.0 g/dl, the risk ratio (RR) for sleep at 22:00 or later was higher than that in the reference group with 11.0 g/dl ≤ hemoglobin < 14.0 g/dl (RR 1.12, 95% confidence interval = 1.00–1.25). In the analysis with maternal hemoglobin level as a continuous variable, both high and low hemoglobin levels were associated with a higher RR of a late bedtime. In addition, a low maternal hemoglobin level was associated with a higher RR for abnormal fine motor skills in the ASQ. Conclusion Our results suggest that a low level of maternal hemoglobin during pregnancy is associated with late bedtime and abnormal fine motor skills in 1‐year‐old infants. Conversely, a high level of maternal hemoglobin may also be associated with the infant's late bedtime.
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Affiliation(s)
- Kazushige Nakahara
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
| | - Takehiro Michikawa
- Department of Environmental and Occupational Health, School of Medicine Toho University Tokyo Japan
| | - Seiichi Morokuma
- Department of Health Sciences, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
- Research Centre for Environment and Developmental Medical Sciences Kyushu University Fukuoka Japan
| | - Norio Hamada
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
- Research Centre for Environment and Developmental Medical Sciences Kyushu University Fukuoka Japan
| | - Masanobu Ogawa
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
- Research Centre for Environment and Developmental Medical Sciences Kyushu University Fukuoka Japan
| | - Kiyoko Kato
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
- Research Centre for Environment and Developmental Medical Sciences Kyushu University Fukuoka Japan
| | - Masafumi Sanefuji
- Research Centre for Environment and Developmental Medical Sciences Kyushu University Fukuoka Japan
- Department of Pediatrics, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
| | - Eiji Shibata
- Japan Environment and Children's Study, UOEH Subunit Centre University of Occupational and Environmental Health Kitakyushu Japan
- Department of Obstetrics and Gynecology, School of Medicine University of Occupational and Environmental Health Kitakyushu Japan
| | - Mayumi Tsuji
- Japan Environment and Children's Study, UOEH Subunit Centre University of Occupational and Environmental Health Kitakyushu Japan
- Department of Environmental Health, School of Medicine University of Occupational and Environmental Health Kitakyushu Japan
| | - Masayuki Shimono
- Japan Environment and Children's Study, UOEH Subunit Centre University of Occupational and Environmental Health Kitakyushu Japan
- Department of Pediatrics University of Occupational and Environmental Health Kitakyushu Japan
| | - Toshihiro Kawamoto
- Japan Environment and Children's Study, UOEH Subunit Centre University of Occupational and Environmental Health Kitakyushu Japan
| | - Shouichi Ohga
- Research Centre for Environment and Developmental Medical Sciences Kyushu University Fukuoka Japan
- Department of Pediatrics, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
| | - Koichi Kusuhara
- Japan Environment and Children's Study, UOEH Subunit Centre University of Occupational and Environmental Health Kitakyushu Japan
- Department of Pediatrics University of Occupational and Environmental Health Kitakyushu Japan
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10
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Campos CM, Desiderio GR, Martins RT, Hamada N. The Amazonian shredder caddisfly Phylloicus elektoros Prather, 2003 (Trichoptera: Calamoceratidae): description of the larva and pupa. Studies on Neotropical Fauna and Environment 2021. [DOI: 10.1080/01650521.2021.1933861] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- C. M. Campos
- Divisão do Curso em Entomologia (DiEnt), Instituto Nacional de Pesquisas da Amazônia (INPA), Coordenação de Pós-Graduação (COPOG), Manaus, Brazil
| | - G. R. Desiderio
- Divisão do Curso em Entomologia (DiEnt), Instituto Nacional de Pesquisas da Amazônia (INPA), Coordenação de Pós-Graduação (COPOG), Manaus, Brazil
| | - R. T. Martins
- Divisão do Curso em Entomologia (DiEnt), Instituto Nacional de Pesquisas da Amazônia–INPA, Coordenação de Biodiversidade–COBIO, Manaus, Brazil
| | - N. Hamada
- Divisão do Curso em Entomologia (DiEnt), Instituto Nacional de Pesquisas da Amazônia (INPA), Coordenação de Pós-Graduação (COPOG), Manaus, Brazil
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11
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Nicacio G, Cunha EJ, Hamada N, Juen L. How Habitat Filtering Can Affect Taxonomic and Functional Composition of Aquatic Insect Communities in Small Amazonian Streams. Neotrop Entomol 2020; 49:652-661. [PMID: 32440832 DOI: 10.1007/s13744-020-00780-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 04/28/2020] [Indexed: 06/11/2023]
Abstract
Responses in taxonomic and functional composition of communities were analysed in small Amazonian streams at the small and large scale (habitat patches, river segment scale, and catchment scale). We hypothesised that similar responses in community structure to local environmental factors were a correlation between taxonomic and functional composition. To evaluate the response of taxonomic composition to environmental variables, redundancy analysis (RDA) and RLQ analysis were performed to investigate the response of community abundance (L) as a function of the environment (R) and traits (Q). The fourth-corner analysis was applied to summarize specific interactions between environmental variables and traits. Then, community taxonomic composition was associated with models at multiple scales of habitat (i.e. riparian/channel, substrates, and water variables). Likewise, the fourth-corner tests and RLQ axes showed associations between trait composition and environmental variables related to variables, such as riparian cover and channel morphology followed by variation in substrate size and composition. Unexpectedly, these results did not show specific associations between unique environmental variables and traits. At last, results showed that local conditions of stream habitat regulated community structure and functional composition of aquatic insects. Thus, these findings indicate that the local environmental filtering appears to be strongly associated with selected species traits adapted to occur in a range of habitat conditions. Despite the low number of analysed streams, these results provide important information for understanding the simultaneous variation in functional trait composition and community composition of aquatic insect assemblages.
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Affiliation(s)
- G Nicacio
- Pós-Graduação em Zoologia, Instituto de Ciências Biológicas, Univ Federal do Pará, Rua Augusto Correia, Bairro Guamá, Belém, Pará, Brasil.
| | - E J Cunha
- Pós-Graduação em Zoologia, Instituto de Ciências Biológicas, Univ Federal do Pará, Rua Augusto Correia, Bairro Guamá, Belém, Pará, Brasil
| | - N Hamada
- Programa de Pós-graduação em Entomologia, Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, AM, Brasil
| | - L Juen
- Pós-Graduação em Zoologia, Instituto de Ciências Biológicas, Univ Federal do Pará, Rua Augusto Correia, Bairro Guamá, Belém, Pará, Brasil
- Instituto de Ciências Biológicas, Univ Federal do Pará, Belém, PA, Brasil
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12
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Hamada N, Hamazaki N, Shimamoto S, Hikabe O, Nagamatsu G, Takada Y, Kato K, Hayashi K. Germ cell-intrinsic effects of sex chromosomes on early oocyte differentiation in mice. PLoS Genet 2020; 16:e1008676. [PMID: 32214314 PMCID: PMC7138321 DOI: 10.1371/journal.pgen.1008676] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 04/07/2020] [Accepted: 02/17/2020] [Indexed: 12/13/2022] Open
Abstract
A set of sex chromosomes is required for gametogenesis in both males and females, as represented by sex chromosome disorders causing agametic phenotypes. Although studies using model animals have investigated the functional requirement of sex chromosomes, involvement of these chromosomes in gametogenesis remains elusive. Here, we elicit a germ cell-intrinsic effect of sex chromosomes on oogenesis, using a novel culture system in which oocytes were induced from embryonic stem cells (ESCs) harboring XX, XO or XY. In the culture system, oogenesis using XO and XY ESCs was severely disturbed, with XY ESCs being more strongly affected. The culture system revealed multiple defects in the oogenesis of XO and XY ESCs, such as delayed meiotic entry and progression, and mispairing of the homologous chromosomes. Interestingly, Eif2s3y, a Y-linked gene that promotes proliferation of spermatogonia, had an inhibitory effect on oogenesis. This led us to the concept that male and female gametogenesis appear to be in mutual conflict at an early stage. This study provides a deeper understanding of oogenesis under a sex-reversal condition.
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Affiliation(s)
- Norio Hamada
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Nobuhiko Hamazaki
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
| | - So Shimamoto
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Orie Hikabe
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Go Nagamatsu
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Yuki Takada
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Kiyoko Kato
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Katsuhiko Hayashi
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
- * E-mail:
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13
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Zhang F, Suzuki M, Kim IS, Kobayashi R, Hamada N, Sato F, Bhawal UK. Transcription factor DEC1 is required for maximal experimentally induced periodontal inflammation. J Periodontal Res 2018; 53:883-893. [DOI: 10.1111/jre.12578] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2018] [Indexed: 11/28/2022]
Affiliation(s)
- F. Zhang
- Department of Anesthesiology; Nihon University School of Dentistry at Matsudo; Chiba Japan
| | - M. Suzuki
- Department of Anesthesiology; Nihon University School of Dentistry at Matsudo; Chiba Japan
| | - I. S. Kim
- Department of Dental Hygiene; Honam University; Gwangju Korea
| | - R. Kobayashi
- Department of Microbiology and Immunology; Nihon University School of Dentistry at Matsudo; Chiba Japan
| | - N. Hamada
- Division of Microbiology; Department of Oral Science; Graduate School of Dentistry; Kanagawa Dental University; Yokosuka Japan
| | - F. Sato
- Department of Pathology; Wakayama Medical University School of Medicine; Wakayama Japan
| | - U. K. Bhawal
- Department of Biochemistry and Molecular Biology; Nihon University School of Dentistry at Matsudo; Chiba Japan
- Research Institute of Oral Health; Nihon University School of Dentistry at Matsudo; Chiba Japan
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14
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Held KD, Hamada N. Correction to: Held and Hamada, Summary of the Bill Morgan Memorial Symposium - part 1: biology, epidemiology and radiation protection. Int J Radiat Biol 2017; 93:x. [PMID: 28766988 DOI: 10.1080/09553002.2017.1359999] [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: 10/19/2022]
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15
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Ogino H, Fujimichi Y, Sasaki M, Hamada N, Iwasaki T, Yoshida K, Hattori T. Quantitative assessment of provability of radiation-related cancers considering unavoidable existence of unadjusted risk factors. J Radiol Prot 2016; 36:865-884. [PMID: 27739409 DOI: 10.1088/0952-4746/36/4/865] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The attribution of stochastic effects to exposure to ionizing radiation has been qualitatively discussed by introducing two distinct concepts of provability and probability. This study aims to develop a method of quantitatively assessing the provability of radiation-related cancers. To this end, the 'minimum provable dose' (MPD) was developed and applied to actual cancer mortality in Japan. The background lifetime risk of cancer mortality was calculated for the esophagus, stomach, colon, liver, lungs, skin, breasts, ovaries, bladder, and bone marrow as well as the age-specific risk coefficients reproducing those given in the 2007 Recommendations of the International Commission on Radiological Protection (ICRP). Comparing the relative ratio of MPDs, which was defined herein as the 'provability index' (PI), we quantitatively ranked radiation-related cancers for different tissues and organs predicated on provability for ages of 10, 30, 50, and 0-85+ years at exposure. We discuss the radiological protection of male emergency workers focusing on cancers highly prioritized according to the ranking (i.e. colon, bone marrow, and bladder). The present study proposed the system to quantitatively evaluate the level of radiological protection taking into account the variations of the background cancer risk on the provability of radiation-related cancers.
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Affiliation(s)
- H Ogino
- Radiation Safety Research Center, Nuclear Technology Research Laboratory, Central Research Institute of Electric Power Industry, 2-11-1, Iwado Kita, Komae-shi, Tokyo 201-8511, Japan
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16
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Nakamura R, Inagaki Y, Hata H, Hamada N, Umemura N, Kamimura T. Wide-bandgap nonlinear crystal LiGaS 2 for femtosecond mid-infrared spectroscopy with chirped-pulse upconversion. Appl Opt 2016; 55:9365-9369. [PMID: 27869834 DOI: 10.1364/ao.55.009365] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Femtosecond time-resolved mid-infrared (MIR) spectroscopy based on chirped-pulse upconversion is a promising method for observing molecular vibrational dynamics. A quantitative study on nonlinear media for upconversion is still essential for wide applications, particularly at the frequencies below 2000 cm-1. We evaluate wide-bandgap nonlinear crystals of Li-containing ternary chalcogenides based on their performance as the upconversion medium for femtosecond MIR spectroscopy. The upconversion efficiency is measured as a function of the MIR pulse frequency and the chirped pulse energy. LiGaS2 is found to be an efficient crystal for the upconversion of MIR pulses in a wide frequency range of 1100-2700 cm-1, especially below 2000 cm-1. By using LiGaS2 as an efficient upconversion crystal, we develop a MIR pump-probe spectroscopy system with a spectral resolution of 2.5 cm-1, a time resolution of 0.2 ps, and a probe window of 120 cm-1. Vibrational relaxation dynamics of CO stretching modes of Mn2(CO)10 in cyclohexane and bovine serum albumin in D2O are demonstrated with a high signal-to-noise ratio.
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17
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Hikabe O, Hamazaki N, Nagamatsu G, Obata Y, Hirao Y, Hamada N, Shimamoto S, Imamura T, Nakashima K, Saitou M, Hayashi K. Reconstitution in vitro of the entire cycle of the mouse female germ line. Nature 2016; 539:299-303. [PMID: 27750280 DOI: 10.1038/nature20104] [Citation(s) in RCA: 351] [Impact Index Per Article: 43.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 09/22/2016] [Indexed: 01/12/2023]
Abstract
The female germ line undergoes a unique sequence of differentiation processes that confers totipotency to the egg. The reconstitution of these events in vitro using pluripotent stem cells is a key achievement in reproductive biology and regenerative medicine. Here we report successful reconstitution in vitro of the entire process of oogenesis from mouse pluripotent stem cells. Fully potent mature oocytes were generated in culture from embryonic stem cells and from induced pluripotent stem cells derived from both embryonic fibroblasts and adult tail tip fibroblasts. Moreover, pluripotent stem cell lines were re-derived from the eggs that were generated in vitro, thereby reconstituting the full female germline cycle in a dish. This culture system will provide a platform for elucidating the molecular mechanisms underlying totipotency and the production of oocytes of other mammalian species in culture.
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Affiliation(s)
- Orie Hikabe
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan
| | - Nobuhiko Hamazaki
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan
| | - Go Nagamatsu
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yayoi Obata
- Department of Bioscience, Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Yuji Hirao
- NARO Institute of Livestock and Grassland Science, Ikenodai 2, Tsukuba 305-0901, Japan
| | - Norio Hamada
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan.,Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan
| | - So Shimamoto
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takuya Imamura
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kinichi Nakashima
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan
| | - Mitinori Saitou
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan.,Center for iPS Cell Research and Application, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.,Institute for Integrated Cell-Material Sciences, Kyoto University, Yoshida-Ushinomiya-cho, Sakyo-ku, Kyoto 606-8501, Japan.,JST, ERATO, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Katsuhiko Hayashi
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan.,JST, PRESTO, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan
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18
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Fukukura Y, Fujiyoshi F, Hamada H, Takao S, Aikou T, Hamada N, Yonezawa S, Nakajo M. Intraductal papillary mucinous tumors of the pancreas. Acta Radiol 2016; 44:464-71. [PMID: 14510751 DOI: 10.1080/j.1600-0455.2003.00111.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Purpose: To compare the effectiveness of thin-section helical CT and MR imaging with gadolinium-enhanced dynamic technique and MR cholangiopancreatography (MRCP) in the examination of patients with intraductal papillary mucinous tumors. Material and Methods: Helical CT, dynamic MR imaging, and MRCP of 25 intraductal papillary mucinous tumors were compared with ERCP and surgical findings. Results: The duodenal papilla was identified by helical CT and dynamic MR imaging in 11 (44%) and 20 (80%) of the 25 patients, respectively ( p<0.05). The main pancreatic duct was visualized on helical CT, dynamic MR imaging, and MRCP in all patients (100%): 25 (96.2%), 24 (92.3%), and 26 (100%) cystic lesions were depicted, respectively. A communicating duct between the main pancreatic duct and the cystic lesion was visualized on helical CT, dynamic MR imaging, and MRCP in 14 (53.8%), 11 (42.3%), and 15 (55.7%) lesions, respectively. The papillary projections corresponding to 3 mm or larger papillary neoplasms were depicted on helical CT and MR imaging in 7 patients (25%). Conclusion: MR imaging was equal or slightly superior to thin-section helical CT in the evaluation of intraductal papillary mucinous tumors.
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Affiliation(s)
- Y Fukukura
- Department of Radiology, Faculty of Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima City 890-8520, Japan.
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Hamada N, Silva JO, Pedroza MK. A new species of Enderleina Jewett (Plecoptera, Perlidae) from Amazonas State, Brazil. Zootaxa 2016; 4098:392-400. [PMID: 27394593 DOI: 10.11646/zootaxa.4098.2.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Indexed: 11/04/2022]
Abstract
Enderleina Jewett, 1960 is one of the least-known Perlidae genera in northern South America, including six species. During an aquatic insect survey of the northern portion of Amazonas State, Brazil, we collected a male Enderleina with a distinct pronotum pattern and genitalic morphology. The objectives of this study are to describe a new species of Enderleina based on male morphology. The new species can be distinguished from all other Enderleina species in the male by the presence of a paired thin dark band on the mesal region of pronotum and by the structure of the penial armature.
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Affiliation(s)
- N Hamada
- Instituto Nacional de Pesquisas da Amazônia - INPA, Coordenação de Biodiversidade- CBio, 69067-375, Manaus, AM, Brazil.;
| | - J O Silva
- Instituto Nacional de Pesquisas da Amazônia - INPA, Coordenação de Biodiversidade- CBio, 69067-375, Manaus, AM, Brazil.;
| | - M K Pedroza
- Instituto Nacional de Pesquisas da Amazônia - INPA, Coordenação de Biodiversidade- CBio, 69067-375, Manaus, AM, Brazil.;
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Matsuo T, Sugita T, Shimose S, Hamada N, Deie M, Urata Y. 367P Detecting circulating tumor cells by hTERT-specific replication-selective adenovirus in postoperative sarcoma patients. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv530.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Hisatake S, Koda Y, Nakamura R, Hamada N, Nagatsuma T. Terahertz balanced self-heterodyne spectrometer with SNR-limited phase-measurement sensitivity. Opt Express 2015; 23:26689-26695. [PMID: 26480182 DOI: 10.1364/oe.23.026689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Photonics-based frequency-domain terahertz (THz) wave measurement systems have received significant attention in both scientific and industrial fields due to their high-frequency resolution. Highly sensitive phase-measurement systems have been desired in the chemical, material, and biomedical sciences to facilitate microanalysis of materials. Here, we demonstrate a balanced self-heterodyne technique that, for the first time, simultaneously offers wide frequency tunability of more than 2.5 THz and high phase sensitivity, which is limited only by the signal-to-noise ratio (SNR) of the amplitude measurement. Using free-running lasers for THz wave generation and detection, the experimentally achieved minimum detectable optical path length change was 400±50 nm at 2 THz for a SNR of 37.7 ± 0.7 dB, even though the theoretically expected SNR-limited value was 310 ± 20 nm. The phase measurement sensitivity of our system is almost one order of magnitude better than that of the conventional systems in which limitations arise from phase instabilities in the optical components and/or laser linewidth.
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Hamada N, Tan Z, Kanematsu Y, Inazumi N, Nakamura R. Influence of a chromophore analogue in the protein cage of a photoactive yellow protein. Photochem Photobiol Sci 2015; 14:1722-8. [PMID: 26178816 DOI: 10.1039/c5pp00176e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Time-resolved spectra of a photoactive yellow protein (PYP) containing cyano-p-coumaric acid (CHCA) were recorded. To understand the mechanism of photo-isomerization, an electron-withdrawing CN group was introduced into the PYP to alter the C[double bond, length as m-dash]C double bond character. Free CHCA chromophores in aqueous solution underwent photo-isomerization whereas PYP with a bound CHCA (PYP-CN) exhibited no photocycle at acidic or alkaline pH or in urea and other solutions. Furthermore, no photocycle was observed with PYP mutants after illumination. This phenomenon cannot be fully explained by the electron-withdrawing properties of the CN group. We conclude that the CHCA chromophore in PYP was locked in the protein cage and that the CN group interacted with the protein residues.
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Affiliation(s)
- Norio Hamada
- Science & Technology Entrepreneurship Laboratory (e-square), Osaka University, 2-1 Yamadaoka, Suita, Osaka, Japan.
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Ahmed Z, McHugh S, Elmallah A, Hamada N, Colgan M, O'Callaghan A, O'Neill S, Madhavan P, Martin Z. Emergency Tansfer to Specialist Thoracic Endovascular Centre: A Safe and Feasaible Option. Eur J Vasc Endovasc Surg 2015. [DOI: 10.1016/j.ejvs.2015.06.102] [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]
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Leonel BF, Koroiva R, Hamada N, Ferreira-Keppler RL, Roque FO. Potential Effects of Climate Change on Ecological Interaction Outcomes Between Two Disease-Vector Mosquitoes: A Mesocosm Experimental Study. J Med Entomol 2015; 52:866-872. [PMID: 26336208 DOI: 10.1093/jme/tjv068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 08/13/2014] [Accepted: 05/24/2015] [Indexed: 06/05/2023]
Abstract
The objective of this study was to experimentally assess the effects of different climate change scenarios on the outcomes of interactions between Aedes aegypti (L.) and Culex quinquefasciatus (Say) (Diptera: Culicidae) larvae. The experimental design maintained a constant density of specimens while the proportion of the species in different experimental climate change scenarios varied. Our results indicate that survival of the two species was not affected, but larval development and pupation times decreased under elevated atmospheric CO(2) concentration and high air temperature. In climate change scenarios with both species together, the survival of Ae. aegypti increased and its larval development time decreased with increasing density of Cx. quinquefasciatus. This may be attributed to the effects of intraspecific competition being more significant than interspecific competition in Ae. aegypti. Our study also reveals that climatic changes may affect the patterns of interactions between Cx. quinquefasciatus and Ae. aegypti. Alterations in climatic conditions changed the response of context-dependent competition, indicating the importance of studies on how ecological interactions will be affected by projected future climatic change.
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Affiliation(s)
- B F Leonel
- Laboratório de Ecologia, CCBS, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS 79070-900, Brazil
| | - R Koroiva
- Programa de Pós-graduação em Ecologia e Conservação, CCBS, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS 79070-900, Brazil
| | - N Hamada
- Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, AM 69067-375, Brazil
| | - R L Ferreira-Keppler
- Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, AM 69067-375, Brazil
| | - F O Roque
- Laboratório de Ecologia, CCBS, Universidade Federal de Mato Grosso do Sul - UFMS, Campo Grande, MS 79070-900, Brazil.
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Roque FO, Escarpinati SC, Valente-Neto F, Hamada N. Responses of Aquatic Saproxylic Macroinvertebrates to Reduced-Impact Logging in Central Amazonia. Neotrop Entomol 2015; 44:345-350. [PMID: 26174960 DOI: 10.1007/s13744-015-0295-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Accepted: 03/28/2015] [Indexed: 06/04/2023]
Abstract
Reduced-impact logging (RIL) is an alternative land use because it reduces damage to forest cover in comparison with clear-cut practices. However, management practices adopted in RIL can affect wood availability and, consequently, fauna associated with dead wood during part of their life cycle (saproxylic). In this study, we evaluated whether aquatic saproxylic macroinvertebrates are affected by reduced-impact logging in Central Amazonia. We selected six streams in areas under reduced-impacted logging and six in primary forest areas and collected submerged woody debris. We did not find any differences in water pH, conductivity, and wood availability between reduced-impacted forest and primary forest streams. We found 248 saproxylic aquatic macroinvertebrates belonging to 37 taxa. We found five wood specialist (Dryops, Lutrochus, Stenochironomus, Oukuriella, and Endotribelos) and 32 generalists, totalling 98 and 150 individuals, respectively. In general, our results show that reduced-impact logging does not affect richness, abundance, and composition of saproxylic macroinvertebrates. The main explanation for this pattern is that management practices do not change important macroinvertebrate niche dimensions, including wood availability and the water's chemical and physical variables. Thus, controlled logging, such as applied in the area of the Central Amazonian streams studied, opens a new prospect for insect conservation and commercial exploitation of wood, which is not possible when clear-cut practices are adopted.
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Affiliation(s)
- F O Roque
- Centro de Ciências Biológicas e da Saúde, Univ Federal do Mato Grosso do Sul, Campo Grande, MS, 79804-970, Brasil
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Nakamura R, Hamada N. Vibrational Energy Flow in Photoactive Yellow Protein Revealed by Infrared Pump–Visible Probe Spectroscopy. J Phys Chem B 2015; 119:5957-61. [DOI: 10.1021/jp512994q] [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: 11/30/2022]
Affiliation(s)
- Ryosuke Nakamura
- Science
and Technology Entrepreneurship
Laboratory, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Norio Hamada
- Science
and Technology Entrepreneurship
Laboratory, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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Lacerda ACF, Gusmão GA, Hamada N. Tests of chronic and acute toxicity of crude oil on larvae of Chironomus kiiensis Tokunaga (Diptera: Chironomidae). BRAZ J BIOL 2015; 74:S70-7. [PMID: 25627368 DOI: 10.1590/1519-6984.24012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 06/07/2013] [Indexed: 11/22/2022] Open
Abstract
The Amazon region, known for its mega-biodiversity, also holds large reserves of petroleum and natural gas. The increasing exploitation of natural gas and crude oil in the Amazon has not been accompanied by studies evaluating the impact of these pollutants on local biological communities, particularly aquatic organisms. The aim of the present study was to determine the values of acute and chronic toxicity of crude oil from Urucu to larvae of Chironomus kiiensis Tokunaga, 1936. The LD5048h of crude oil for second-instar larvae of C. kiiensis was 26.5 mg/L, and mortality for the majority of concentrations tested was greatest during the first 24 hours of the experiment. The survival of eggs of C. kiiensis exposed to concentrations of crude oil was also evaluated but did not differ significantly among the treatments. Despite the high tolerance observed for the species in the experiments, there is a possibility that in the natural environment the oil interacts with other factors, leading to synergistic effects, so further studies are needed to assess the effects of this pollutant on aquatic insect species.
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Affiliation(s)
- A C F Lacerda
- Programa de Pós-Graduação em Ciências Biológicas (Zoologia), Departamento de Sistemática e Ecologia, Universidade Federal da Paraíba - UFPB, João Pessoa,, PB, Brazil
| | - G A Gusmão
- Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus,, AM, Brazil
| | - N Hamada
- Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus,, AM, Brazil
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Matsuo T, Hamada N, Hachisuka H, Hamasaki T, Izuta Y, Mori R, Okawa S, Harada T, Urata Y, Sugita T. Evaluation of Human Circulating Tumor Cells By Htert-Specific Replication-Selective Adenovirus in Soft Tissue Sarcoma. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu354.37] [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: 11/13/2022] Open
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Sultan S, Chua BYC, Hamada N, Hynes N. Preoperative vascular screening in the presence of aortic, carotid and peripheral pathology for patients undergoing their first arterial intervention: 18 month follow-up. INT ANGIOL 2013; 32:281-290. [PMID: 23711680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND The aim of this paper was to determine prevalence and incidence of intervention required for concomitant Asymptomatic Vascular Disease (AVD) on patients undergoing their first elective peripheral arterial intervention. METHODS This is a prospective observational study Data was obtained on patients undergoing peripheral revascularisation, abdominal aortic aneurysmal (AAA) repair or carotid procedure from 2006 to 2009. Of 542 complex arterial procedures, 328 patients had their first vascular intervention. (PAD=127, AAA=97, CAD=83, concomitant AAA and PAD=21). Primary endpoint is detection of any concomitant asymptomatic AAA, CAS or PAD. Secondary endpoints are need for intervention of AVD detected on screening, and major adverse clinical events during follow-up. RESULTS Prevalence of AVD detected was 13% PAD, 51% CAS and 8%AAA. Symptomatic and Asymptomatic PolyVasBed patients had 11.4- and 8.16-fold increased likelihood for detection of asymptomatic CAS respectively (P<0.0001) relative to the remaining study population. Asymptomatic PolyVasBed patients had 8.2 fold increased likelihood of asymptomatic AAA, P<0.0001, compared to the remaining study population. Likelihood for intervention in Asymptomatic PolyVasBed is OR 5.740 (P=0.044) and Symptomatic PolyVasBed is OR 4.500 (P<0.001). Asymptomatic AAA detected in both symptomatic and asymptomatic vascular disease patients, is the strongest predicting factor of intervention in 18 months follow-up. In Asymptomatic PolyVasBed patients, CAS and AAA have the highest prevalence. CONCLUSIONS Screening for AVD is mandatory prior to any vascular intervention.
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Affiliation(s)
- S Sultan
- Department of Vascular and Endovascular Surgery, Western Vascular Institute WVI, University College Hospital, Galway UCHG, Newcastle Road, Galway, Ireland.
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Nakamura R, Hamada N, Abe K, Yoshizawa M. Structural Evolution in Photoactive Yellow Protein Studied by Femtosecond Stimulated Raman Spectroscopy. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134107008] [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: 11/14/2022] Open
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Nakamura R, Hamada N, Abe K, Yoshizawa M. Ultrafast hydrogen-bonding dynamics in the electronic excited state of photoactive yellow protein revealed by femtosecond stimulated Raman spectroscopy. J Phys Chem B 2012; 116:14768-75. [PMID: 23210980 DOI: 10.1021/jp308433a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The ultrafast structural dynamics in the electronic excited state of photoactive yellow protein (PYP) is studied by femtosecond stimulated Raman spectroscopy. Stimulated Raman spectra in the electronic excited state, S(1), can be obtained by using a Raman pump pulse in resonance with the S(1)-S(0) transition. This is confirmed by comparing the experimental results with numerical calculations based on the density matrix treatment. We also investigate the hydrogen-bonding network surrounding the wild-type (WT)-PYP chromophore in the ground and excited states by comparing its stimulated Raman spectra with those of the E46Q-PYP mutant. We focus on the relative intensity of the Raman band at 1555 cm(-1), which includes both vinyl bond C═C stretching and ring vibrations and is sensitive to the hydrogen-bonding network around the phenolic oxygen of the chromophore. The relative intensity for the WT-PYP decreases after actinic excitation within the 150 fs time resolution and reaches a similar intensity to that for E46Q-PYP. These observations indicate that the WT-PYP hydrogen-bonding network is immediately rearranged in the electronic excited state to form a structure similar to that of E46Q-PYP.
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Affiliation(s)
- Ryosuke Nakamura
- Science and Technology Entrepreneurship Laboratory, Osaka University, Suita, Osaka, Japan.
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Hamada A, Akiyoshi R, Ishii J, Hamada N, Miyazaki C, Hamada T, Ohwaki Y, Ikeda R, Wada M, Nakashima K. Influence of calcium channel blockers in patients with gastrointestinal disease in Japanese community pharmacies. J Clin Pharm Ther 2012; 37:74-7. [DOI: 10.1111/j.1365-2710.2011.01253.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: 11/30/2022]
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Takashima Y, Fukui Y, Otsubo M, Hamada N, Yamaguchi H, Yamamoto H, Harada A. Emission properties of cyclodextrin dimers linked with perylene diimide—effect of cyclodextrin tumbling. Polym J 2012. [DOI: 10.1038/pj.2011.128] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hamada N, Mesquita L, Pereira I, Nakano E, Borrely S, Tallarico L. Avaliação Ecotoxicológica da Estação de Tratamento de Esgotos Suzano (São Paulo) Utilizando Daphnia similis e Vibrio fischeri. ACTA ACUST UNITED AC 2011. [DOI: 10.5132/jbse.2011.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Cruz PV, Belmont EL, Boldrini R, Hamada N. Leptohyphidae (Insecta: Ephemeroptera) from northeastern Brazil. Neotrop Entomol 2011; 40:682-688. [PMID: 23939275 DOI: 10.1590/s1519-566x2011000600008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Accepted: 07/26/2011] [Indexed: 06/02/2023]
Abstract
New records of Leptohyphidae for Northeastern Brazil are provided. Previously, only Tricorythopsis bahiensis Dias, Salles & Ferreira had been recorded in this region, but we now record one species of Amanahyphes Salles & Molineri, one of Leptohyphes Eaton, three of Traverhyphes Molineri, three of Tricorythodes Ulmer, and seven of Tricorythopsis Traver. Two of these species are recorded for the first time in Brazil. As all of these species are reported, the Northeastern Brazil became the second most diverse geographic region in Brazil in Leptohyphidae.
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Nishioka A, Ogawa Y, Suzuki Y, Miyatake K, Tadokoro M, Kariya S, Nogami M, Hamada N, Kubota K. 6540 POSTER The Impacts of Intraoperative Radiotherapy With Image-guided Enzyme Targeting Radiosensitization (KORTUC-IORT) for Stage IVa Pancreatic Cancer. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)71851-2] [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]
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Umemura S, Kiura K, Tsubouchi K, Takigawa N, Fujiwara K, Horita N, Segawa Y, Hamada N, Takata I, Tanimoto M. Clinical outcome of patients with leptomeningeal metastasis from non-small cell lung cancer: Okayama Lung Cancer Study Group. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.7544] [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: 11/20/2022] Open
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Ogawa Y, Kubota K, Tadokoro M, Yamanishi T, Hamada N, Kariya S, Nishioka A, Suzuki Y, Aoyama N, Nogami M, Yokota N, Sasaki T, Yaogawa S, Tsuzuki A, Akima R, Suzuki K, Tokuhiro S. 777 poster US-GUIDED & ENZYME-TARGETING RADIOSENSITIZATION TREATMENT (KORTUC II) WITHOUT ANY SURGERY FOR PATIENTS WITH BREAST CANCER OF STAGES I & II. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)70899-4] [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: 10/18/2022]
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Sakamoto K, Takashima Y, Hamada N, Ichida H, Yamaguchi H, Yamamoto H, Harada A. Selective Photoinduced Energy Transfer from a Thiophene Rotaxane to Acceptor. Org Lett 2011; 13:672-5. [DOI: 10.1021/ol102912g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuya Sakamoto
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Yoshinori Takashima
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Norio Hamada
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Hideki Ichida
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Hiroyasu Yamaguchi
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Hitoshi Yamamoto
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Akira Harada
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan, and Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
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Hamada N, Soylu E, Fahy A, Tawfick W, Sultan S. A 5 years parallel observation study of the use of sequential compression biomechanical device (SCBD) in critical limb ischaemia (CLI) patients with un-reconstructable peripheral vascular disease (PVD) vs primary amputation in a tertiary referral vascular centre. Int J Surg 2011. [DOI: 10.1016/j.ijsu.2011.07.322] [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: 10/17/2022]
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Nishioka A, Ogawa Y, Kariya S, Miyatake K, Tadokoro M, Ue H, Matsui R, Hamada N, Kubota K. Safety and Efficacy of New Enzyme Targeting Intraoperative Radiotherapy for Locally Advanced Pancreatic Cancer. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.750] [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: 11/25/2022]
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Sawada T, Yoshino F, Kimoto K, Takahashi Y, Shibata T, Hamada N, Sawada T, Toyoda M, Lee MC. ESR detection of ROS generated by TiO2 coated with fluoridated apatite. J Dent Res 2010; 89:848-53. [PMID: 20525961 DOI: 10.1177/0022034510370806] [Citation(s) in RCA: 21] [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: 11/15/2022] Open
Abstract
Specific materials used in the manufacture of dentures may enhance the removal of micro-organisms. The ultraviolet A (UVA) irradiation of acrylic resin containing titanium dioxide (TiO(2)) generates reactive oxygen species (ROS) by photocatalysis that shows antibacterial effects. In this study, we tested the hypothesis that TiO(2) coated with fluoridated apatite (FAp-TiO(2)) can generate ROS via photo-catalysis by using electron spin resonance (ESR), and that acrylic resin containing FAp-TiO(2) can show antifungal properties by measuring the viability of Candida albicans. We demonstrated that hydroxyl radicals (HO(*)) were generated through excitation of TiO(2), TiO(2) coated with apatite (HAp-TiO(2)), and FAp-TiO(2). The HO(*) generation through excitation of FAp-TiO(2) was higher than that of TiO(2) and HAp-TiO(2). Regarding antifungal activity, cell viability on acrylic resin containing FAp-TiO(2) was lower than that of TiO(2) and HAp-TiO(2). FAp-TiO(2) showed superior photocatalytic effects, and these characteristics may lead to novel methods for the clinical application of denture-cleaning treatments.
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Affiliation(s)
- Tomofumi Sawada
- Division of Removal Prosthetics, Department of Oral and Maxillofacial Rehabilitation, Kanagawa Dental College, Yokosuka, Kanagawa, Japan
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Nishioka A, Kariya S, Miyatake K, Tadokoro M, Tsuzuki K, Hamada N, Fukumoto M, Ogawa Y. 2038 Impact of PET-CT on radiotherapy planning and prediction of primary radiotherapy effects in non-small-cell lung cancer. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)70554-3] [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: 11/27/2022] Open
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Fournier C, Barberet P, Pouthier T, Ritter S, Fischer B, Voss KO, Funayama T, Hamada N, Kobayashi Y, Taucher-Scholz G. No evidence for DNA and early cytogenetic damage in bystander cells after heavy-ion microirradiation at two facilities. Radiat Res 2009; 171:530-40. [PMID: 19580488 DOI: 10.1667/rr1457.1] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The occurrence of bystander effects has challenged the evaluation of risk for heavy ions, mainly in the context of space exploration and the increasing application of carbon ions in radiotherapy. In the present study, we addressed whether heavy-ion-induced DNA and cytogenetic damage is detectable in bystander cells. The formation of gamma-H2AX foci, sister chromatid exchanges and micronuclei were used as markers of damage to DNA. Normal human fibroblasts were exposed to low fluences of carbon and uranium ions, and alternatively single cells were targeted with heavy ions using the GSI microbeam. We did not observe a significant increase in the bystander formation of gamma-H2AX foci, sister chromatid exchanges or micronuclei. In addition, we performed for the first time parallel experiments at two microbeam facilities (GSI, JAEA) using the same cell line, culture conditions and irradiation protocols. No significant enhancement of the micronucleus frequencies in bystander cells was detected after targeted carbon-ion irradiation, confirming the results. Details regarding the history, culture conditions or support of the cells might be affecting the detection of bystander effects. On the other hand, the potential X-ray- and heavy-ion-induced bystander effects investigated herein clearly do not exceed the experimental error and thus are either lacking or are less pronounced than the effects reported in the literature for similar end points after alpha-particle and X-ray exposure.
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Affiliation(s)
- C Fournier
- Department of Biophysics, Gesellschaft für Schwerionenforschung, 64291 Darmstadt, Germany.
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Hamada N, Miyata M, Eto H, Shirasawa T, Nagaki A, Tei C. Abstract: P166 TACROLIMUS-ELUTING STENT INHIBITS NEOINTIMAL HYPERPLASIA VIA CALCINEURIN/NFAT SIGNALING IN PORCINE CORONARY ARTERY MODEL. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70473-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ijiri H, Coulibaly F, Nishimura G, Nakai D, Chiu E, Takenaka C, Ikeda K, Nakazawa H, Hamada N, Kotani E, Metcalf P, Kawamata S, Mori H. Structure-based targeting of bioactive proteins into cypovirus polyhedra and application to immobilized cytokines for mammalian cell culture. Biomaterials 2009; 30:4297-308. [PMID: 19477509 DOI: 10.1016/j.biomaterials.2009.04.046] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2009] [Accepted: 04/28/2009] [Indexed: 12/13/2022]
Abstract
Certain insect viruses produce stable infectious micro-crystals called polyhedra which function to protect the virus after the death of infected larvae. Polyhedra form within infected cells and contain numerous virus particles embedded in a crystalline lattice of the viral protein polyhedrin. We have previously demonstrated that the N-terminal 75 amino acids of the Bombx mori cypovirus (BmCPV) turret protein (VP3) can function as a polyhedrin recognition signal leading to the incorporation of foreign proteins into polyhedra. Foreign proteins tagged with the VP3 polyhedrin recognition signal were incorporated into polyhedra by co-expression with polyhedrin in insect cells. We have used this method to encapsulate a wide variety of foreign proteins into polyhedra. The atomic structure of BmCPV polyhedrin showed that the N-terminal H1 alpha-helix of polyhedrin plays a significant role in cross-linking and stabilizing polyhedra. Here we show that the polyhedrin H1-helix can also function as a polyhedrin recognition signal and can be used like the VP3 N-terminal sequence to target foreign proteins into polyhedra. In addition, the two targeting methods can be used together to produce polyhedra containing both EGFP and Discosoma sp. Red Fluorescent Protein (DsRed). The modified polyhedra were imaged using dual-wavelength confocal microscopy showing that the two foreign proteins are uniformly incorporated into polyhedra at similar levels. We have investigated the biological and physiological properties of fibroblast growth factor-2 (FGF-2), FGF-7 and epidermal growth factor (EGF) immobilized on polyhedra with either the H1 or the VP3 tag. Growth factors produced by both methods were functional, inducing the growth of fibroblast cells and keratinocytes. The results demonstrate the utility and flexibility of modified polyhedra for encapsulating and stabilizing bioactive proteins.
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Affiliation(s)
- Hiroshi Ijiri
- Insect Biomedical Research Center, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Kim Y, Hamada N, Takahashi Y, Sasaguri K, Tsukinoki K, Onozuka M, Sato S. Cervical sympathectomy causes alveolar bone loss in an experimental rat model. J Periodontal Res 2009; 44:695-703. [PMID: 19453856 DOI: 10.1111/j.1600-0765.2008.01177.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND OBJECTIVE Periodontal disease, a pathological destructive inflammatory condition, is characterized by alveolar bone loss. Recent studies have suggested a correlation between the sympathetic nervous system and bone remodeling. To confirm the importance of the sympathetic nervous system in bone resorption, we investigated the effects of superior cervical ganglionectomy and oral challenge with Porphyromonas gingivalis on alveolar bone loss in rats. MATERIAL AND METHODS Rats were divided into three groups: group A underwent a sham operation as the control group; group B underwent superior cervical ganglionectomy; and group C underwent a sham operation and oral challenge with P. gingivalis. Horizontal alveolar bone loss was evaluated by measuring the distance between the cemento-enamel junction and the alveolar bone crest. Cytokine gene expression in the gingival tissues was assessed using reverse transcription-polymerase chain reaction analyses. The furcation areas of the mandibular molars were examined histologically. RESULTS Both superior cervical ganglionectomy and oral challenge with P. gingivalis resulted in accelerated alveolar bone loss. Gingival tissues in the superior cervical ganglionectomy group showed increased expression of the cytokines interleukin-1 alpha, tumor necrosis factor-alpha and interleukin-6. The density of neuropeptide Y-immunoreactive fibers was decreased following superior cervical ganglionectomy. Osteoclasts were observed in the superior cervical ganglionectomy and P. gingivalis-challenged groups. CONCLUSION Both superior cervical ganglionectomy and oral challenge with P. gingivalis induced alveolar bone loss. These results provide new information on the occurrence of alveolar bone loss, in that both oral challenge with P. gingivalis and superior cervical ganglionectomy are important accelerating factors for alveolar bone loss. Thus, we suggest that the sympathetic nervous system is linked with the prevention of alveolar bone loss.
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Affiliation(s)
- Y Kim
- Department of Craniofacial Growth and Development Dentistry, Division of Orthodontics, Kanagawa Dental College, Yokosuka, Japan
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Okamoto K, Hamada N, Sumi T, Okamura TA, Ueyama N, Yamamoto H. Investigation of the Effect of the NH···OC Hydrogen Bond from Cys69 to PYP Chromophore Using Novel Active-center Model Compound. CHEM LETT 2009. [DOI: 10.1246/cl.2009.456] [Citation(s) in RCA: 4] [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: 11/12/2022]
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Hamada A, Ishii J, Doi K, Hamada N, Miyazaki C, Hamada T, Ohwaki Y, Wada M, Nakashima K. Increased risk of exacerbating gastrointestinal disease among elderly patients following treatment with calcium channel blockers. J Clin Pharm Ther 2009; 33:619-24. [PMID: 19138239 DOI: 10.1111/j.1365-2710.2008.00958.x] [Citation(s) in RCA: 7] [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: 11/27/2022]
Abstract
BACKGROUND AND OBJECTIVE Calcium channel blockers (CCBs) have been widely used for the treatment of hypertension and angina pectoris. It is presumed that CCBs decrease the lower esophageal sphincter pressure and as a result, the risk of gastrointestinal disease may be increased. Since the prevalence of gastrointestinal diseases has increased in elderly patients, it is possible that treatment with CCBs may have contributed to this increase. Therefore, we considered that the risk of exacerbating gastrointestinal disease among elderly patients by CCBs can be estimated by using the prescription ratio of antisecretory drugs as an outcome. METHOD We hypothesized that patients who are prescribed CCBs would increase the use of antisecretory drugs involving H(2)-receptor antagonists and proton pump inhibitors (PPIs). From January 2001 to December 2005, a dynamic retrospective cohort study was performed at three community pharmacies in Nagasaki city, Japan, to assess the use of antisecretory drugs following treatment with CCBs among elderly patients. The correlation of initiation of antisecretory drugs treatment to maintenance therapy with PPIs was determined by the Cox proportional hazards model. RESULTS The proposed study includes 303 patients prescribed CCBs and 258 controls. During the study period, 138 patients prescribed CCBs and 66 controls were initiated by giving antisecretory drugs; the hazard ratio was 1.40 (95% confidence interval 1.21-1.63). Eighty two patients taking CCBs and 32 controls were initiated by the maintenance therapy with PPIs; the hazard ratio was 1.48 (95% confidence interval 1.21-1.83). CONCLUSION Patients who simultaneously initiated the use of antisecretory drugs with CCBs could not be found. Therefore, antisecretory drugs have not been used to prevent the gastrointestinal diseases caused by CCBs. The results obtained in this study suggest that the risk of gastrointestinal disease could be increased by long-term treatment with CCBs for elderly patients.
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Sakamoto M, Kumada H, Hamada N, Takahashi Y, Okamoto M, Bakir MA, Benno Y. Prevotella falsenii sp. nov., a Prevotella intermedia-like organism isolated from monkey dental plaque. Int J Syst Evol Microbiol 2009; 59:319-22. [DOI: 10.1099/ijs.0.002626-0] [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: 11/18/2022] Open
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