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Yamada T, Kawakami S, Yoshida Y, Kawamura H, Ohta S, Abe K, Hamada H, Dohi S, Ichizuka K, Takita H, Baba Y, Matsubara S, Mochizuki J, Unno N, Maegawa Y, Maeda M, Inubashiri E, Akutagawa N, Kubo T, Shirota T, Oda Y, Yamada T, Yamagishi E, Nakai A, Fuchi N, Masuzaki H, Urabe S, Kudo Y, Nomizo M, Sagawa N, Maeda T, Kamitomo M, Kawabata K, Kataoka S, Shiozaki A, Saito S, Sekizawa A, Minakami H. Influenza 2014–2015 among pregnant Japanese women: primiparous vs multiparous women. Eur J Clin Microbiol Infect Dis 2016; 35:665-71. [DOI: 10.1007/s10096-016-2585-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 01/13/2016] [Indexed: 11/28/2022]
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Arai M, Kudo Y, Miki N. Electroencephalogram measurement from the hairy part of the scalp using polymer-based dry microneedle electrodes. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2015:3165-8. [PMID: 26736964 DOI: 10.1109/embc.2015.7319064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper reports a successful electroencephalogram (EEG) measurement from the hairy part of the scalp using a polymer-based dry microneedle electrode. The electrode consists of 25 pillars, each of which has a sharp microneedle on the top. Hairs are collected into the gaps of the pillars and the microneedles can reach the scalp surface. Since the microneedles can penetrate through the stratum corneum, no conductive gel is necessary to acquire high quality EEG. We experimentally investigated the pillar diameters in EEG measurement from the occipital region with hairs. The fabricated electrodes successfully measured EEG without any skin preparation or conductive gel.
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Arai M, Kudo Y, Miki N. Electroencephalogram measurement from the hairy part of the scalp using polymer-based dry microneedle electrodes. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2015:3165-3168. [PMID: 26736964 DOI: 10.7567/jjap.54.06fp14] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This paper reports a successful electroencephalogram (EEG) measurement from the hairy part of the scalp using a polymer-based dry microneedle electrode. The electrode consists of 25 pillars, each of which has a sharp microneedle on the top. Hairs are collected into the gaps of the pillars and the microneedles can reach the scalp surface. Since the microneedles can penetrate through the stratum corneum, no conductive gel is necessary to acquire high quality EEG. We experimentally investigated the pillar diameters in EEG measurement from the occipital region with hairs. The fabricated electrodes successfully measured EEG without any skin preparation or conductive gel.
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Kudo Y, Abe A, Ito K, Cho Y, Yotsu-Yamashita M, Konoki K. Expression of recombinant alpha and beta tubulins from the yew Taxus cuspidata and analysis of the microtubule assembly in the presence of taxol. Biosci Biotechnol Biochem 2014; 78:1887-94. [PMID: 25070196 DOI: 10.1080/09168451.2014.940837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Taxol was originally isolated from the yew Taxus brevifolia. Because taxol inhibits the depolymerization of microtubules, the presence of a self-resistance mechanism in Taxus spp. was hypothesized. The cloning of the cDNA for alpha and beta tubulins from Taxus cuspidata and those from the human embryonic kidney cell line HEK293T revealed that the (26)Asp, (359)Arg, and (361)Leu residues in the human beta tubulin, which are important for taxol binding, were replaced with Glu, Trp, and Met in the beta tubulin of T. cuspidata, respectively. The microtubule assembly of the recombinant alpha and beta tubulins was monitored turbidimetrically, and the results clearly demonstrated that the microtubule from T. cuspidata is less sensitive to taxol than that from HEK293T cells. The Taxus microtubule composed of the wild-type alpha tubulin and the beta tubulin with the E26D mutation restored the sensitivity to taxol. We thus postulated that the mutation identified in the beta tubulin of T. cuspidata plays a role in the self-resistance of this species against taxol.
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Funato M, Ono Y, Baba K, Kudo Y. Evaluation of the non-functional tooth contact in patients with temporomandibular disorders by using newly developed electronic system. J Oral Rehabil 2014; 41:170-6. [PMID: 24447128 PMCID: PMC4263305 DOI: 10.1111/joor.12129] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2013] [Indexed: 11/28/2022]
Abstract
The aims of this study were to introduce a novel electronic system for reliable evaluation of the non-functional tooth contact in patients with temporomandibular disorders (TMDs) and investigate the possible associations between the non-functional tooth contact and some characteristics of the patients with TMD. We designed and installed a software program to send emails regarding the non-functional tooth contact to the subjects' preregistered cellular phones at intervals of 20 ± 9 min daily for 10 consecutive days. Twelve patients with TMD and 12 gender- and age-matched healthy subjects responded via emails to one of 3 choices: no tooth contact, tooth contact during oral functions or tooth contact not associated with oral functions. The influence of subjective stress, anxiety, depression, personality and daily activities on tooth contact was then assessed. The frequency of the non-functional tooth contact was significantly higher in the patients with TMD than in the healthy subjects (35·0% vs. 9·6%, P < 0·001), while no significant group difference was found for the frequency of functional tooth contact, the stress, anxiety, depression and personality.
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Shikama Y, Ishimaru N, Kudo Y, Bando Y, Aki N, Hayashi Y, Funaki M. Effects of free fatty acids on human salivary gland epithelial cells. J Dent Res 2013; 92:540-6. [PMID: 23603335 DOI: 10.1177/0022034513487378] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Obesity and type 2 diabetes (T2D) are characterized by decreased insulin sensitivity and higher concentrations of free fatty acids (FFAs) in plasma. Among FFAs, saturated fatty acids (SFAs), such as palmitate, have been proposed to promote inflammatory responses. Primary Sjögren's syndrome (SS) is an autoimmune disease characterized by inflammatory mononuclear cell infiltration and destruction of epithelial cells in the salivary and lacrimal glands. IL-6 production and α-fodrin degradation are increased in salivary gland epithelial cells of patients with primary SS. Although previous studies have shown a link between SS and either dyslipidemia or T2D, little is known about the clinical significance of FFAs in primary SS. Here we report that SFAs, but not unsaturated fatty acids, induced IL-6 production via NF-κB and p38 MAPK activation in human salivary gland epithelial cells. Moreover, palmitate induced apoptosis and α-fodrin degradation by caspase-3 activation. Unlike salivary gland epithelial cells, induction of IL-6 production and the degradation of α-fodrin in response to palmitate were undetectable in squamous carcinoma cells and keratinocytes. Taken together, SFAs induced IL-6 production and α-fodrin degradation in salivary gland epithelial cells, implicating a potential link between the pathogenesis of primary SS and SFAs level in plasma.
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Kudo Y. The theme of the meeting was "Dissecting the placenta: the scientist's and obstetrician's points of view". Preface. Placenta 2012; 34 Suppl:S2. [PMID: 23218890 DOI: 10.1016/j.placenta.2012.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 11/08/2012] [Accepted: 11/12/2012] [Indexed: 11/26/2022]
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Ogawa I, Takata T, Miyauchi M, Ito H, Zhao M, Kudo Y, Nikai H. nm23-H1 expression in salivary adenoid cystic carcinoma in relation to metastasis and survival. Oncol Rep 2012; 4:707-11. [PMID: 21590125 DOI: 10.3892/or.4.4.707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The expression of nm23-H1, product of putative metastasis suppressor gene, was evaluated immunohistochemically in 31 cases of adenoid cystic carcinoma (ACC) of salivary glands and correlated with their clinicopathologic features. All benign salivary gland tumors of various types, which were used as a non-metastatic control, showed obvious nm23-H1 expression. The immunoreactivity of tumor cells was stronger than that of normal salivary gland components, although the distribution patterns of positive cells considerably varied between tumor types. In ACC, 16 cases (52%) showed the reduction of nm23-H1 immunoreactivity either in positive cell frequency or staining intensity. These cases were referred to as negative cases. The incidence of negative cases was 67% (10/15) and 38% (6/16) of the cases with and without metastasis, respectively. Furthermore, metastatic tumors showed decreased immunoreactivity of this protein compared with their primary tumors. The prognosis of patients with a nm23 negative tumor was generally poorer than that with a positive tumor. These results may suggest that the reduction of nm23-H1 protein has an implication for metastasis of ACC.
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Hatano H, Kudo Y, Ogawa I, Shimasue H, Shigeishi H, Ohta K, Higashikawa K, Takechi M, Takata T, Kamata N. Establishment of mesenchymal cell line derived from human developing odontoma. Oral Dis 2012; 18:756-62. [DOI: 10.1111/j.1601-0825.2012.01942.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Villemagne VL, Furumoto S, Fodero-Tavoletti M, Mulligan R, Jones G, Piguet O, Hodges J, Kudo Y, Masters C, Yanai K, Rowe C, Okamura N. 81 In vivo tau imaging with PET. Neurobiol Aging 2012. [DOI: 10.1016/j.neurobiolaging.2012.01.099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Johkura K, Nakae Y, Kudo Y, Yoshida TN, Kuroiwa Y. Early diffusion MR imaging findings and short-term outcome in comatose patients with hypoglycemia. AJNR Am J Neuroradiol 2012; 33:904-9. [PMID: 22268090 DOI: 10.3174/ajnr.a2903] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The relationship between the MR imaging features and clinical outcomes in patients with hypoglycemic encephalopathy has always been evaluated retrospectively. The aim of this study was to prospectively evaluate whether MR imaging features of patients presenting with hypoglycemic coma are predictive of short-term (1-week) outcomes. MATERIALS AND METHODS Subjects were 36 consecutive patients with hypoglycemia who were in a comatose state on arrival at our hospital from April 2006 to March 2010. MR imaging findings on arrival in relation to the patients' clinical course after glucose infusion were evaluated. RESULTS Thirteen of the 36 patients showed no MR imaging abnormalities on arrival. DWI revealed focal lesions involving the internal capsule in 13 patients and lesions involving bilateral hemispheric white matter in 10 patients. After glucose administration, the patients without lesions and patients with focal internal capsule lesions recovered completely within 1 day. However, patients with diffuse white matter lesions did not recover even within 1 week despite glucose administration. There was no statistical difference in the initial blood glucose levels among patients with the various types of MR imaging findings. CONCLUSIONS On early MR imaging, hypoglycemic brain injury may first appear in the internal capsule and then spread into the hemispheric white matter. The absence of a lesion or the presence of a focal internal capsule lesion may suggest a good outcome. However, diffuse hemispheric white matter lesions may indicate a poor 1-week outcome.
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Chihara I, Kudo Y, Tsuboi S, Sadakane A, Aoyama Y, Ae R, Enkh-Oyun T, Kotani K, Uehara R, Nakamura Y. SP3-30 Characteristics of attempted suicide patients presenting to secondary and tertiary emergency rooms, Tochigi prefecture, Japan. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976o.30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Terashita Y, Sugimura S, Kudo Y, Amano R, Hiradate Y, Sato E. Improving the Quality of Miniature Pig Somatic Cell Nuclear Transfer Blastocysts: Aggregation of SCNT Embryos at the Four-cell Stage. Reprod Domest Anim 2011; 46:189-96. [DOI: 10.1111/j.1439-0531.2010.01614.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fujii R, Fujimoto M, Kuga M, Kudo Y, Suzuki H, Haki K, Nishimon S, Nakane J. The current status of forensic psychiatry in japan. Eur Psychiatry 2011. [DOI: 10.1016/s0924-9338(11)72484-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
In 2005, the Medical Treatment and Supervision (MTS) Act was enacted in Japan to hospitalize the criminally insane and to promote a self-supporting lifestyle after deinstitutionalization. As of October 2010, 490 patients remain hospitalized in 23 highly secure forensic hospitals. Most patients are diagnosed with chronic schizophrenia and exhibit symptoms of drug resistance. Battering is the most common criminal act they have committed.The increased prevalence of the combination of criminal insanity with drug dependence is a common problem in other countries as well. It is a serious problem that diversity in prison medical care has not been achieved.A characteristic feature of care for criminally insane patients in Japan is that they must live in a residential district where a public health center is located and close to forensic hospitals after deinstitutionalization. Although there may be concerns about social prejudice against psychiatric disorders, this limited area would help support rehabilitation of patients because medical staff can easily know the whereabouts, psychiatric condition and aspects, of daily life for each patient through frequent reports obtained from home-visiting nurses. As a result, patients who have been successfully deinstitutionalized lead a self-supporting lifestyle without treatment interruption or repetition of similar criminal acts.In this presentation, we will show the current status of forensic care in Japan, analyze its characteristics and problems described above, and make suggestions for the treatment of the criminally insane in countries with a small national land area such as Japan.
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Fujiwara H, Takayama S, Iwasaki K, Tabuchi M, Yamaguchi T, Sekiguchi K, Ikarashi Y, Kudo Y, Kase Y, Arai H, Yaegashi N. Yokukansan, a traditional Japanese medicine, ameliorates memory disturbance and abnormal social interaction with anti-aggregation effect of cerebral amyloid β proteins in amyloid precursor protein transgenic mice. Neuroscience 2011; 180:305-13. [PMID: 21303686 DOI: 10.1016/j.neuroscience.2011.01.064] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 01/28/2011] [Accepted: 01/31/2011] [Indexed: 10/18/2022]
Abstract
The deposition of amyloid β protein (Aβ) is a consistent pathological hallmark of Alzheimer's disease (AD) brains. Therefore, inhibition of Aβ aggregation in the brain is an attractive therapeutic and preventive strategy in the development of disease-modifying drugs for AD. An in vitro study demonstrated that yokukansan (YKS), a traditional Japanese medicine, inhibited Aβ aggregation in a concentration-dependent manner. An in vivo study demonstrated that YKS and Uncaria hook (UH), a constituent of YKS, prevented the accumulation of cerebral Aβ. YKS also improved the memory disturbance and abnormal social interaction such as increased aggressive behavior and decreased social behavior in amyloid precursor protein transgenic mice. These results suggest that YKS is likely to be a potent and novel therapeutic agent to prevent and/or treat AD, and that this may be attributed to UH.
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Al-Khan A, Aye IL, Barsoum I, Borbely A, Cebral E, Cerchi G, Clifton VL, Collins S, Cotechini T, Davey A, Flores-Martin J, Fournier T, Franchi AM, Fretes RE, Graham CH, Godbole G, Hansson SR, Headley PL, Ibarra C, Jawerbaum A, Kemmerling U, Kudo Y, Lala PK, Lassance L, Lewis RM, Menkhorst E, Morris C, Nobuzane T, Ramos G, Rote N, Saffery R, Salafia C, Sarr D, Schneider H, Sibley C, Singh AT, Sivasubramaniyam TS, Soares MJ, Vaughan O, Zamudio S, Lash GE. IFPA Meeting 2010 Workshops Report II: Placental pathology; trophoblast invasion; fetal sex; parasites and the placenta; decidua and embryonic or fetal loss; trophoblast differentiation and syncytialisation. Placenta 2011; 32 Suppl 2:S90-9. [PMID: 21236487 DOI: 10.1016/j.placenta.2010.12.025] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 12/21/2010] [Accepted: 12/21/2010] [Indexed: 11/29/2022]
Abstract
Workshops are an important part of the IFPA annual meeting. At IFPA Meeting 2010 diverse topics were discussed in twelve themed workshops, six of which are summarized in this report. 1. The placental pathology workshop focused on clinical correlates of placenta accreta/percreta. 2. Mechanisms of regulation of trophoblast invasion and spiral artery remodeling were discussed in the trophoblast invasion workshop. 3. The fetal sex and intrauterine stress workshop explored recent work on placental sex differences and discussed them in the context of whether boys live dangerously in the womb.4. The workshop on parasites addressed inflammatory responses as a sign of interaction between placental tissue and parasites. 5. The decidua and embryonic/fetal loss workshop focused on key regulatory mediators in the decidua, embryo and fetus and how alterations in expression may contribute to different diseases and adverse conditions of pregnancy. 6. The trophoblast differentiation and syncytialisation workshop addressed the regulation of villous cytotrophoblast differentiation and how variations may lead to placental dysfunction and pregnancy complications.
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Fushimi M, Shimizu T, Saito S, Kudo Y, Seki M, Murata K. Prevalence of and risk factors for psychological distress among employees in Japan. Public Health 2010; 124:713-5. [DOI: 10.1016/j.puhe.2010.07.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 06/10/2010] [Accepted: 07/26/2010] [Indexed: 10/18/2022]
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Fujimoto J, Tanigawa K, Kudo Y, Makino H, Watanabe K. Identification and quantification of viable Bifidobacterium breve strain Yakult in human faeces by using strain-specific primers and propidium monoazide. J Appl Microbiol 2010; 110:209-17. [PMID: 21029276 DOI: 10.1111/j.1365-2672.2010.04873.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
AIMS To develop a quick and accurate PCR-based method to evaluate viable Bifidobacterium breve strain Yakult (BbrY) in human faeces. METHODS AND RESULTS The number of BbrY in faeces was detected by using strain-specific quantitative real-time PCR (qPCR) derived from a randomly amplified polymorphic DNA analysis. And using propidium monoazide (PMA) treatment, which combined a DNA-intercalating dye for covalently linking DNA in dead cells and photoactivation, only viable BbrY in the faeces highly and significantly correlated with the number of viable BbrY added to faecal samples within the range of 10(5) -10(9) cells per g of faeces was enumerated. After 11 healthy subjects ingested 10·7 log CFU of BbrY daily for 10 days, 6·9 (± 1·5) log CFU g(-1) [mean (± SD)] of BbrY was detected in faeces by using strain-specific transgalactosylated oligosaccharide-carbenicillin (T-CBPC) selective agar medium. Viable BbrY detected by qPCR with PMA treatment was 7·5 (± 1·0) log cells per g and the total number (viable and dead) of BbrY detected by qPCR without PMA treatment was 8·1 (± 0·8) log cells per g. CONCLUSIONS Strain-specific qPCR with PMA treatment evaluated viable BbrY in faeces quickly and accurately. SIGNIFICANCE AND IMPACT OF THE STUDY Combination of strain-specific qPCR and PMA treatment is useful for evaluating viable probiotics and its availability in humans.
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Yamaoka N, Kaneko K, Kudo Y, Aoki M, Yasuda M, Mawatari K, Nakagomi K, Yamada Y, Yamamoto T. Analysis of purine in purine-rich cauliflower. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2010; 29:518-21. [PMID: 20544547 DOI: 10.1080/15257771003741372] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Purine is a general term for purine nucleotides, nucleosides, bases, and nucleic acid. The amount of purine nucleotides, nucleosides, and bases in purine-rich cauliflower was determined with the use of LC-MS and HPLC, and the ratio of these molecules were compared with in raw and in heated condition. Total purine content of raw and heated cauliflower was 42.6 and 43.2 mg/100 g, respectively. Nucleotide content was increased from 0.02 to 50.8 micromol/100 g, and nucleoside content was decreased from 12.4 to 7.7 micromol/100 g, by heating.
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Asakawa H, Tsunoda M, Kaido T, Hosokawa M, Sugaya C, Inoue Y, Kudo Y, Satoh T, Katagiri H, Akita H, Saji M, Wakasa M, Negishi T, Tashiro T, Aizawa Y. Enhanced inhibitory effects of TBT chloride on the development of F1 rats. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2010; 58:1065-1073. [PMID: 19937321 DOI: 10.1007/s00244-009-9421-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2009] [Accepted: 11/03/2009] [Indexed: 05/28/2023]
Abstract
Neurotoxicity is one of the major effects of tributyltin (TBT). The effects on the next generation of F(1) rats exposed to TBT via the placenta and their dams' milk may be stronger than those on adults. Pregnant Wister rats were exposed to TBT at 0 and 125 ppm in their food. Half of the female F(1) rats in both groups were exposed to TBT at 125 ppm in their food from 9 to 15 weeks of age. Female F(1) rats were divided into the following groups: the control-control (CC) group, with no exposure; the TBT-control (TC) group, exposed to TBT via the placenta and their dams' milk; the control-TBT (CT) group, exposed to TBT via their food from 9 to 15 weeks of age; and the TBT-TBT (TT) group, exposed to TBT via the placenta, their dams' milk, and their food (n = 10/group). After administration, an open-field test and prepulse inhibition (PPI) test were performed at 15 weeks of age. The mean body weights of the TC and TT groups were significantly lower than that of the CC group from 9 to 15 weeks of age. The mean relative thymus weight of the TC and TT groups was significantly lower than that of the CC group. In the open-field test, a marked decrease in the total locomotion distance was observed in the TT group. The mean values in the TT and TC groups were significantly lower than that in the CC group. For the locomotion distance between 15 and 20 min, the mean values in the CT, TC, and TT groups were significantly lower than that in the CC group. The mean locomotor distance between 25 and 30 min in the TT group was significantly lower than that in the CC and TC groups. The mean values of instances of wall rearing in the TC, CT, and TT groups were significantly lower than that in the CC group. The mean value of face washing or body washing in the TT group was significantly lower than that in the CT group. There were no significant differences in indexes of the PPI test. Exposure to TBT via the placenta and their dams' milk inhibited the development of F(1) rats, which continued after weaning. Inhibition of the rats' activity induced by exposure to TBT via the placenta and their dams' milk and/or via their food was suggested. The effects were most evident in the TT group.
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Lash GE, Burton GJ, Chamley LW, Clifton VL, Constancia M, Crocker IP, Dantzer V, Desoye G, Drewlo S, Hemmings DG, Hiendleder S, Kalionis B, Keelan JA, Kudo Y, Lewis RM, Manuelpillai U, Murthi P, Natale D, Pfarrer C, Robertson S, Saffery R, Saito S, Sferruzzi-Perri A, Sobrevia L, Waddell BJ, Roberts CT. IFPA Meeting 2009 workshops report. Placenta 2010; 31 Suppl:S4-20. [PMID: 20064659 DOI: 10.1016/j.placenta.2009.12.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Revised: 12/07/2009] [Accepted: 12/08/2009] [Indexed: 10/20/2022]
Abstract
Workshops are an important part of the annual meeting of the International Federation of Placenta Associations (IFPA). At IFPA Meeting 2009 diverse topics were discussed in twelve themed workshops. Topics covered included: immune response to pregnancy; signaling between fetus and placenta; bioactive lipids in placenta; placenta in agricultural species; epigenetics and placentation; trophoblast deportation; glucocorticoids and placental function; endothelium; placental transport; genes and placenta; uteroplacental blood flow and placental stem cells. This report is a full summary of the various topics covered.
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Watanabe K, Fujimoto J, Tomii Y, Sasamoto M, Makino H, Kudo Y, Okada S. Lactobacillus kisonensis sp. nov., Lactobacillus otakiensis sp. nov., Lactobacillus rapi sp. nov. and Lactobacillus sunkii sp. nov., heterofermentative species isolated from sunki, a traditional Japanese pickle. Int J Syst Evol Microbiol 2009; 59:754-60. [DOI: 10.1099/ijs.0.004689-0] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Taguchi A, Ohtsuka M, Nakamoto T, Suei Y, Kudo Y, Tanimoto K, Bollen AM. Detection of post-menopausal women with low bone mineral density and elevated biochemical markers of bone turnover by panoramic radiographs. Dentomaxillofac Radiol 2008; 37:433-7. [DOI: 10.1259/dmfr/85235532] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Yoshida N, Yamada K, Uchino S, Sun X, Nakamura T, Kudo Y, Hisatsune T, Kaminogawa S. Glutamate triggers elevation of intracellular Ca(2+) concentration in neural precursor cells. Cytotechnology 2008; 33:157-65. [PMID: 19002823 DOI: 10.1023/a:1008102621059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Both neurons and glial cells are derived from neuralprecursor cells in the ventricular zone during braindevelopment. The fate of the neural precursor cells isaffected by neurotransmitters such as glutamate. Inthis study, we examined glutamate-triggeredintracellular Ca(2+) signaling in neural precursorcell lines by the calcium digital imaging method. Whenimmortalized primary-cultured neural precursor cellswere treated with glutamate, a subpopulation of thesecells showed an increase in intracellular Ca(2+)concentration. In an effort to determine the role ofthe glutamate-triggered intracellular Ca(2+) signalin neural precursor cells, we tried to cultureimmortalized basal ganglial and hippocampal neuralprecursor cell lines in glutamate-free medium. Thehippocampal (MHP-2) cells became adapted to theglutamate-free medium, and when treated with glutamatethe adapted subline (MHP-2-E1) showed an increase inintracellular Ca(2+) concentration. In contrast,the basal ganglial neural precursor cell lines failedto become adapted to the glutamate-free medium. Theseresults suggest that hippocampal and basal ganglialneural precursor cells differ in their cellularresponse to glutamate as an exogenous stimulus.
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Kaneko K, Kudo Y, Yamanobe T, Mawatari K, Yasuda M, Nakagomi K, Fujimori S. Purine contents of soybean-derived foods and selected Japanese vegetables and mushrooms. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2008; 27:628-30. [PMID: 18600517 DOI: 10.1080/15257770802138681] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Purine contents of soybean-derived food and various other Japanese foods were quantitatively determined by high-performance liquid chromatography (HPLC). Purine contents were as follows: soybean-derived foods, 21.9-172.5 mg/100 g or 100 mL; Japanese vegetables, 2.3-171.8 mg/100 g; Japanese mushrooms, 9.5-142.3 mg/100 g. Since purine levels in these foods did not exceed 200 mg/100 g, we recommend that eating of them should be adopted and good dietary habits followed.
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