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Baba Y, Kohase H, Oono Y, Fujii-Abe K, Arendt-Nielsen L. Effects of dexmedetomidine on conditioned pain modulation in humans. Eur J Pain 2012; 16:1137-47. [PMID: 22392567 DOI: 10.1002/j.1532-2149.2012.00129.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2012] [Indexed: 01/23/2023]
Abstract
BACKGROUND Systemic administration of dexmedetomidine (DEX; selective α(2) -adrenoceptor agonist) is found to inhibit diffuse noxious inhibitory control in rats, now referred to as conditioned pain modulation (CPM) in humans. The present study was designed to investigate the effect of intravenous administration of DEX on CPM in humans. METHODS There were two sequential sessions in this double blind, randomized study. The first session was the control with normal saline infusion (N(1st), L(1st), H(1st)). During the second session, three types of agents were infused: normal saline (N(2nd)); a low plasma concentration of DEX (0.04 ng/mL; L(2nd)); and a high plasma concentration of DEX (0.08 ng/mL; H(2nd)). The amplitude of somatosensory evoked potentials (ampSEP)s and the visual analogue scale of tooth pain (VASt) induced by electrical tooth stimulation were evaluated with and without conditioning CO(2) laser stimulation of the hand. The inhibition rate (% inhibition) was calculated [= (1-[ampSEP or VASt with conditioning stimuli]/[ampSEP or VASt without conditioning stimuli]) × 100] to compare the magnitude of the DEX effects on CPM. RESULTS The inhibition rates of ampSEPs and VASt in Types N, L and H varied significantly, demonstrating a dose-dependent reduction of CPM effects of ampSEP and VASt during randomized DEX administration, consistent with results from animal studies. CONCLUSIONS The present study shows that systemic administration of an α(2) -adrenoceptor agonist (DEX), less than the clinical dose, inhibited CPM in humans. These results may provide some mechanistic insight into why many chronic pain patients show impaired CPM.
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Baba Y, Hayashi S, Ikeda S, Higashi M, Nakajo M. Abstract No. 144: Effectiveness of endovascular embolization with collagen type 1: an animal experimental study. J Vasc Interv Radiol 2012. [DOI: 10.1016/j.jvir.2011.12.188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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103
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Naoi Y, Tanei T, Kishi K, Tsunashima R, Tominaga N, Baba Y, Nakayama T, Shimazu K, Kim S, Tamaki Y, Noguchi S. 70-Gene classifier for differentiation between paclitaxel- and docetaxel-sensitive breast cancers. Cancer Lett 2012; 314:206-12. [DOI: 10.1016/j.canlet.2011.09.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 09/22/2011] [Accepted: 09/23/2011] [Indexed: 02/03/2023]
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104
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Baba Y. 3.1.3 PHARMACOLOGICAL TREATMENT FOR DYSTONIA. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70697-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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105
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Baba Y, Kurosaki T. Impact of Ca2+ signaling on B cell function. Trends Immunol 2011; 32:589-94. [DOI: 10.1016/j.it.2011.09.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 08/26/2011] [Accepted: 09/09/2011] [Indexed: 10/16/2022]
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Baba Y. [Function of store-operated calcium entry in immune cells]. Nihon Yakurigaku Zasshi 2011; 137:202-6. [PMID: 21558669 DOI: 10.1254/fpj.137.202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Baba Y, Higuchi MA, Fukuyama K, Abe H, Uehara Y, Inoue T, Yamada T. Effect of chronic kidney disease on excessive daytime sleepiness in Parkinson disease. Eur J Neurol 2011; 18:1299-303. [PMID: 21435111 DOI: 10.1111/j.1468-1331.2011.03391.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND PURPOSES Excessive daytime sleepiness (EDS) is a common sleep disorder in patients with Parkinson disease (PD). Non-ergot dopamine agonists increase the risk of unanticipated sleep episodes. OBJECTIVE We aimed to assess the influence of renal function on EDS in patients with PD. METHODS Sixty-two patients treated with ropinirole or pramipexole were recruited for this study. We evaluated the historical and clinical characteristics including the motor symptom rating scales, Epworth Sleepiness Scale (ESS), and estimated glomerular filtration rate (eGFR). An ESS score of 10 or greater was defined as EDS. Participants with eGFR < 60 ml/min/1.73 m(2) were determined to have chronic kidney disease (CKD). Multiple logistic regression analysis was performed to determine the predictive factors of EDS. RESULTS Chronic kidney disease was found to be a significant predictive factor for EDS in all patients (P = 0.014). We observed a negative correlation between the severity of daytime sleepiness and renal function in patients treated with pramipexole alone (r(s) = -0.637, P < 0.001). CONCLUSIONS Chronic kidney disease may be a risk factor for EDS, especially in patients treated with pramipexole, which is directly excreted in the urine.
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Nagao K, Yamamoto Y, Hara T, Komatsu H, Inoue R, Matsuda K, Matsumoto H, Hara T, Sakano S, Baba Y, Matsuyama H. Ki67 and BUBR1 May Discriminate Clinically Insignificant Prostate Cancer in the PSA Range <4 ng/ml. Jpn J Clin Oncol 2011; 41:555-64. [DOI: 10.1093/jjco/hyq233] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Matsui T, Ogawa H, Yamada N, Baba Y, Nomoto M, Omori K. Outcome of cochlear implantation in children with congenital cytomegalovirus infection and GJB2 mutation in relation to developmental disorder. Laryngoscope 2011. [DOI: 10.1002/lary.22282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Iwata H, Sato K, Tatewaki K, Yokota N, Inoue M, Baba Y, Shibamoto Y. Hypofractionated Stereotactic Radiotherapy using the CyberKnife for Non-functioning Pituitary Adenoma. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Baba Y, Kuroiwa Y, Ikeda Y, Ootaka T, Kawashima M, Inoe M, Sugita H. P24-16 An EEG study on healthy human subjects while watching the 3D video contents on the 3D display. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61013-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Uematsu E, Kishida H, Iwahashi Y, Koyano S, Baba Y, Kuroiwa Y. P5-4 Electrophysiological analysis of Myerson sign in Parkinson's disease. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60526-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hawkins BJ, Irrinki KM, Mallilankaraman K, Lien YC, Wang Y, Bhanumathy CD, Subbiah R, Ritchie MF, Soboloff J, Baba Y, Kurosaki T, Joseph SK, Gill DL, Madesh M. S-glutathionylation activates STIM1 and alters mitochondrial homeostasis. ACTA ACUST UNITED AC 2010; 190:391-405. [PMID: 20679432 PMCID: PMC2922639 DOI: 10.1083/jcb.201004152] [Citation(s) in RCA: 180] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Oxidant stress induces constitutive calcium entry by tacking glutathiones onto the Orai CRAC channel activator STIM1. Oxidant stress influences many cellular processes, including cell growth, differentiation, and cell death. A well-recognized link between these processes and oxidant stress is via alterations in Ca2+ signaling. However, precisely how oxidants influence Ca2+ signaling remains unclear. Oxidant stress led to a phenotypic shift in Ca2+ mobilization from an oscillatory to a sustained elevated pattern via calcium release–activated calcium (CRAC)–mediated capacitive Ca2+ entry, and stromal interaction molecule 1 (STIM1)– and Orai1-deficient cells are resistant to oxidant stress. Functionally, oxidant-induced Ca2+ entry alters mitochondrial Ca2+ handling and bioenergetics and triggers cell death. STIM1 is S-glutathionylated at cysteine 56 in response to oxidant stress and evokes constitutive Ca2+ entry independent of intracellular Ca2+ stores. These experiments reveal that cysteine 56 is a sensor for oxidant-dependent activation of STIM1 and demonstrate a molecular link between oxidant stress and Ca2+ signaling via the CRAC channel.
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Kurosaki T, Baba Y. Ca2+ signaling and STIM1. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2010; 103:51-8. [PMID: 20226808 DOI: 10.1016/j.pbiomolbio.2010.02.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Revised: 01/16/2010] [Accepted: 02/18/2010] [Indexed: 01/29/2023]
Abstract
An increase in the intracellular calcium ion concentration ([Ca(2+)]) impacts a diverse range of cell functions, including adhesion, motility, gene expression and proliferation. Elevation of intracellular calcium ion (Ca(2+)) regulates various cellular events after the stimulation of cells. Initial increase in Ca(2+) comes from the endoplasmic reticulum (ER), intracellular storage space. However, the continuous influx of extracellular Ca(2+) is required to maintain the increased level of Ca(2+) inside cells. Store-operated Ca(2+) entry (SOCE) manages this process, and STIM1, a newly discovered molecule, has a unique and essential role in SOCE. STIM1 can sense the exhaustion of Ca(2+) in the ER, and activate the SOC channel in the plasma membrane, leading to the continuous influx of extracellular Ca(2+). STIM1 senses the status of the intracellular Ca(2+) stores via a luminal N-terminal Ca(2+)-binding EF-hand domain. Dissociation of Ca(2+) from this domain induces the clustering of STIM1 to regions of the ER that lie close to the plasma membrane, where it regulates the activity of the store-operated Ca(2+) channels/entry (calcium-release-activated calcium channels/entry). In this review, we summarize the mechanism by which STIM1 regulates SOCE, and also its role in the control of mast cell functions and allergic responses.
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Baba Y, Hayashi S, Senokuchi T, Shinmura K, Nakajo M. Abstract No. 222: Intra-arterial infusion chemotherapy combined with radiotherapy for oral cancer: Review of 93 patients. J Vasc Interv Radiol 2010. [DOI: 10.1016/j.jvir.2009.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Ishigaki T, Asai Y, Nakahata Y, Shimada H, Baba Y, Toda K. Evacuation of aged persons from inundated underground space. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2010; 62:1807-1812. [PMID: 20962396 DOI: 10.2166/wst.2010.455] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Underground is an important space that supports function of cities, such as subways, shopping malls and basement parking. However in consequence a new type of disaster, the "urban flood" menaces these spaces. In the last decade, urban floods struck Tokyo, Nagoya and Fukuoka. When underground inundation occurs, people must evacuate to the ground as soon as possible. But, when such an inundation situation happens, aged persons may not be able to evacuate quickly to ground level. In this paper, the method of safety assessment for aged persons is discussed on the experimental results and flood simulation data in an underground space. As a criterion of the safety evacuation, the specific force per unit width is used in this study. From the result of experiments, it is difficult to implement safety evacuation when the specific force per unit width is over 0.100 m(2) for the aged male.
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Higuchi MA, Baba Y, Fukuyama K, Abe H, Onozawa R, Inoue T, Yamada T. P2.135 The effect of subthalamic nucleus stimulation on nonmotor symptoms in Parkinson's disease. Parkinsonism Relat Disord 2009. [DOI: 10.1016/s1353-8020(09)70486-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Baba Y, Higuchi MA, Onozawa R, Yamada T. P2.116 Switching to ropinirole reduces the severity of daytime sleepiness associated with pramipexole therapy in Parkinson's disease with renal dysfunction. Parkinsonism Relat Disord 2009. [DOI: 10.1016/s1353-8020(09)70467-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Onozawa R, Baba Y, Higuchi MA, Fukuyama K, Abe H, Inoue T, Yamada T. P2.151 Anticholinergics for axial symptoms in Parkinson's disease with subthalamic nucleus stimulation. Parkinsonism Relat Disord 2009. [DOI: 10.1016/s1353-8020(09)70502-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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120
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Baba Y, Kurosaki T. Physiological function and molecular basis of STIM1-mediated calcium entry in immune cells. Immunol Rev 2009; 231:174-88. [PMID: 19754897 DOI: 10.1111/j.1600-065x.2009.00813.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Calcium signals in immune cells regulate a variety of physiological responses such as cell activation, differentiation, gene transcription, and effector functions. Surface receptor stimulation induces an increase in the concentration of cytosolic calcium ions (Ca2+), which are derived mainly from two sources, intracellular endoplasmic reticulum (ER) Ca2+ stores and the extracellular space. The major cascade for Ca2+ entry in immune cells is through store-operated Ca2+ entry (SOCE) and Ca2+ release-activated Ca2+ (CRAC) channels. Activation of SOCE is triggered by depletion of intracellular ER Ca2+ stores, but the molecular mechanism was a long-standing issue. With the recent molecular identification of the ER Ca2+ sensor [stromal interacting molecule-1 (STIM1)] and a pore-forming subunit of the CRAC channel (Orai1), our understanding of the SOCE activation pathway has increased dramatically. These advances have now made it possible to shed some light on important questions: what is the physiological significance of SOCE, and what is its molecular basis? This review focuses on the recent progress in the field and the exciting opportunities for understanding how SOCE influences diverse immune functions.
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Abstract
Antigen receptors on the surface of B lymphocytes trigger adaptive immune responses after encountering their cognate antigens but also control a series of antigen-independent checkpoints during B cell development. These physiological processes are regulated by the expression and function of cell surface receptors, intracellular signaling molecules, and transcription factors. The function of these proteins can be altered by a dynamic array of post-translational modifications, using two interconnected mechanisms. These modifications can directly induce an altered conformational state in the protein target of the modification itself. In addition, they can create new binding sites for other protein partners, thereby contributing to where and when such multiple protein assemblies are activated within cells. As a new type of post-transcriptional regulator, microRNAs have emerged to influence the development and function of B cells by affecting the expression of target mRNAs.
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Hayashi N, Mima K, Nagai Y, Baba Y, Imamura Y, Hiyoshi Y, Nakamura T, Yoshida N, Toyama E, Miyanari N, Watanabe M, Baba H. Submucosal tumour in a young girl. Gut 2009; 58:1040, 1090. [PMID: 19592684 DOI: 10.1136/gut.2008.160051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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Morita T, Tanimura A, Baba Y, Kurosaki T, Tojyo Y. A Stim1-dependent, noncapacitative Ca2+-entry pathway is activated by B-cell-receptor stimulation and depletion of Ca2+. J Cell Sci 2009; 122:1220-8. [PMID: 19339554 DOI: 10.1242/jcs.041640] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The depletion of intracellular Ca(2+) stores activates capacitative Ca(2+) entry (CCE), which is a Ca(2+)-selective and La(3+)-sensitive entry pathway. Here, we report a novel mechanism of La(3+)-resistant Ca(2+) entry that is synergistically regulated by B-cell-receptor (BCR) stimulation and Ca(2+) store depletion. In DT40 cells, stimulation of BCRs with anti-IgM antibodies induced Ca(2+) release and subsequent Ca(2+) entry in the presence of 0.3 microM La(3+), a condition in which CCE is completely blocked. This phenomenon was not observed in inositol 1,4,5-trisphosphate receptor-deficient DT40 (IP3R-KO) cells. However, in response to thapsigargin pretreatment, BCR stimulation induced La(3+)-resistant Ca(2+) entry into both wild-type and IP3R-KO cells. These results indicate that BCR stimulation alone does not activate Ca(2+) entry, whereas BCR stimulation and depleted Ca(2+) stores (either due to IP3R-mediated Ca(2+) release or Ca(2+) uptake inhibition) work in concert to activate La(3+)-resistant Ca(2+) entry. This Ca(2+) entry was inhibited by genistein. In addition, BCR-mediated Ca(2+) entry was completely abolished in Stim1-deficient DT40 cells and was restored by overexpression of YFP-Stim1, but was unaffected by double knockdown of Orai1 and Orai2. These results demonstrate a unique non-CCE pathway, in which Ca(2+) entry depends on Stim1- and BCR-mediated activation of tyrosine kinases.
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Baba Y, Kawamukai H, Matsui Y, Igarashi T, Nakamura F, Shibata M. No. 4 �Vol. 42, No. 3, pp. 226-230, 2008 �Development of longwearing lipstick using inorganic-organic hybrid aggregate. Int J Cosmet Sci 2009. [DOI: 10.1111/j.1468-2494.2009.00509_4.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Takihara H, Ishizu K, Ueno T, Isoyama R, Baba Y, Sakatoku J. Pathogenesis of Varicocele: Experimental Study Using Flow Cytometric DNA Analysis: Zur Pathogenese der Varikocele: Experimentelle Studie unter Verwendung der Flow-Cytometrie-DNA-Analyse. Andrologia 2009. [DOI: 10.1111/j.1439-0272.1990.tb01953.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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