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Nagoya A, Kanzaki R, Ose N, Kanou T, Funaki S, Minami M, Shintani Y, Okumura M. P3.15-22 Validation of Eurolung Risk Models in a Japanese Population: A Retrospective Single-Center Analysis of 612 Cases. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1898] [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: 10/28/2022]
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Shigaki S, Fikri MR, Hernandez Reyes C, Sakurai T, Ando N, Kurabayashi D, Kanzaki R, Sezutsu H. Animal-in-the-loop system to investigate adaptive behavior. Adv Robot 2018. [DOI: 10.1080/01691864.2018.1511473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- S. Shigaki
- Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan
| | - M. R. Fikri
- Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan
| | | | - T. Sakurai
- The University of Tokyo, Meguro-ku, Tokyo, Japan
| | - N. Ando
- The University of Tokyo, Meguro-ku, Tokyo, Japan
| | | | - R. Kanzaki
- The University of Tokyo, Meguro-ku, Tokyo, Japan
| | - H. Sezutsu
- National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan
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Kimura K, Kanzaki R, Ose N, Kawamura T, Funaki S, Shintani Y, Minami M, Okumura M. MA 16.08 Surgery for Pleural Dissemination of Thymoma; A 20-Year Experience. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.602] [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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Fujiwara A, Shintani Y, Funaki S, Kawamura T, Kanzaki R, Fukui E, Minami M, Okumura M. P1.02-068 Effects of Pirfenidone Targeting EMT and Tumor-Stroma Interaction as Novel Treatment for Non-Small Cell Lung Cancer. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.801] [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: 11/17/2022]
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Kanzaki R, Naito H, Eino D, Kawamura T, Ose N, Funaki S, Shintani Y, Minami M, Okumura M, Takakura N. P3.16-050 Stromal PDGFR-β Expression Influences Postoperative Survival of NSCLC Patients Receiving Preoperative Chemo- or Chemo-Radiotherapy. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1857] [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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Funaki S, Shintani Y, Ose N, Kawamura T, Kanzaki R, Minami M, Okumura M. P1.17-013 Prognostic Impact of Programmed Cell Death-1 (PD-1) and PD-Ligand 1 (PD-L1) Expression in Thymic Cancer. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1095] [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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Maniwa T, Shintani Y, Okami J, Ohta M, Takeuchi Y, Takami K, Yokouchi H, Kurokawa E, Kanzaki R, Sakamaki Y, Shiono H, Iwasaki T, Nishioka K, Kodama K, Okumura M. MA 17.04 Initial Surgery in Patients with Clinical N2 Non-Small Cell Lung Cancer: A Multi-Institution Retrospective Study. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.612] [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: 11/29/2022]
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Shintani Y, Funaki S, Kawamura T, Ose N, Kanzaki R, Kimura K, Yamamoto Y, Minami M, Okumura M. P1.17-002 Clinicopathological Significance of Epithelial Mesenchymal Transition in Thymic Cancer. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1084] [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: 11/29/2022]
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Funaki S, Shintani Y, Fukui E, Kawamura T, Kimura T, Kanzaki R, Minami M, Okumura M. The regulation of PD-L1 in non small cell lung cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw362.17] [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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Sumitani M, Sakurai T, Kasashima K, Kobayashi S, Uchino K, Kanzaki R, Tamura T, Sezutsu H. Establishment of a specific cell death induction system in Bombyx mori by a transgene with the conserved apoptotic regulator, mouse Bcl-2-associated X protein (mouse Bax). Insect Mol Biol 2015; 24:671-680. [PMID: 26426866 DOI: 10.1111/imb.12192] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The induction of apoptosis in vivo is a useful tool for investigating the functions and importance of particular tissues. B-cell leukaemia/lymphoma 2-associated X protein (Bax) functions as a pro-apoptotic factor and induces apoptosis in several organisms. The Bax-mediated apoptotic system is widely conserved from Caenorhabditis elegans to humans. In order to establish a tissue-specific cell death system in the domestic silkworm, Bombyx mori, we constructed a transgenic silkworm that overexpressed mouse Bax (mBax) in particular tissues by the Gal4-upstream activation sequence system. We found that the expression of mBax induced specific cell death in the silk gland, fat body and sensory cells. Fragmentation of genomic DNA was observed in the fat body, which expressed mBax, thereby supporting apoptotic cell death in this tissue. Using this system, we also demonstrated that specific cell death in sensory cells attenuated the response to the sex pheromone bombykol. These results show that we successfully established a tissue-specific cell death system in vivo that enabled specific deficiencies in particular tissues. The inducible cell death system may provide useful means for industrial applications of the silkworm and possible utilization for other species.
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Affiliation(s)
- M Sumitani
- Genetically Modified Organism Research Center, National Institute of Agrobiological Sciences, Owashi, Tsukuba, Ibaraki, Japan
| | - T Sakurai
- Research Center for Advanced Science and Technology, University of Tokyo, Komaba, Meguro-Ku, Tokyo, Japan
| | - K Kasashima
- Division of Functional Biochemistry Department of Biochemistry, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - S Kobayashi
- Genetically Modified Organism Research Center, National Institute of Agrobiological Sciences, Owashi, Tsukuba, Ibaraki, Japan
| | - K Uchino
- Genetically Modified Organism Research Center, National Institute of Agrobiological Sciences, Owashi, Tsukuba, Ibaraki, Japan
| | - R Kanzaki
- Research Center for Advanced Science and Technology, University of Tokyo, Komaba, Meguro-Ku, Tokyo, Japan
| | - T Tamura
- Genetically Modified Organism Research Center, National Institute of Agrobiological Sciences, Owashi, Tsukuba, Ibaraki, Japan
| | - H Sezutsu
- Genetically Modified Organism Research Center, National Institute of Agrobiological Sciences, Owashi, Tsukuba, Ibaraki, Japan
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Takahashi H, Tokushige H, Shiramatsu T, Noda T, Kanzaki R. Covariation of pupillary and auditory cortical activity in rats under isoflurane anesthesia. Neuroscience 2015; 300:29-38. [DOI: 10.1016/j.neuroscience.2015.05.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 04/30/2015] [Accepted: 05/01/2015] [Indexed: 11/29/2022]
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Shiinoki T, Kawamura S, Hanazawa H, Uehara T, Yuasa Y, Park S, Koike M, Kanzaki R, Shibuya K. EP-1611: 4D dose calculation for SBRT using deformable image registration and probability density function of lung tumor. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31729-1] [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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Sawabata N, Kanzaki R, Sakamoto T, Kusumoto H, Kimura T, Nojiri T, Kawamura T, Susaki Y, Funaki S, Nakagiri T, Shintani Y, Inoue M, Minami M, Okumura M. Clinical predictor of pre- or minimally invasive pulmonary adenocarcinoma: possibility of sub-classification of clinical T1a. Eur J Cardiothorac Surg 2013; 45:256-61. [DOI: 10.1093/ejcts/ezt329] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Sawabata N, Sakamoto T, Kusumoto H, Kimura T, Kanzaki R, Mojiri T, Kawamura T, Susaki Y, Funaki S, Nakagiri T, Shintani Y, Inoue M, Minami M, Okumura M. P-133CLINICAL PREDICTOR OF PRE- OR MINIMALLY-INVASIVE PULMONARY ADENOCARCINOMA: A PROPOSAL FOR SUB-CLASSIFICATION OF CLINICAL T1a. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt288.133] [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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Abstract
The reconstruction of mechanisms behind odour-tracking behaviours of animals is expected to enable the development of biomimetic robots capable of adaptive behaviour and effectively locating odour sources. However, because the behavioural mechanisms of animals have not been extensively studied, their behavioural capabilities cannot be verified. In this study, we have employed a mobile robot driven by a genuine insect (insect-controlled robot) to evaluate the behavioural capabilities of a biological system implemented in an artificial system. We used a male silkmoth as the 'driver' and investigated its behavioural capabilities to imposed perturbations during odour tracking. When we manipulated the robot to induce the turning bias, it located the odour source by compensatory turning of the on-board moth. Shifting of the orientation paths to the odour plume boundaries and decreased orientation ability caused by covering the visual field suggested that the moth steered with bilateral olfaction and vision to overcome the bias. An evaluation of the time delays of the moth and robot movements suggested an acceptable range for sensory-motor processing when the insect system was directly applied to artificial systems. Further evaluations of the insect-controlled robot will provide a 'blueprint' for biomimetic robots and strongly promote the field of biomimetics.
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Affiliation(s)
- N Ando
- Research Center for Advanced Science and Technology, The University of Tokyo, Japan.
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Takahashi H, Yokota R, Funamizu A, Kose H, Kanzaki R. Learning-stage-dependent, field-specific, map plasticity in the rat auditory cortex during appetitive operant conditioning. Neuroscience 2011; 199:243-58. [PMID: 21985937 DOI: 10.1016/j.neuroscience.2011.09.046] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [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: 08/12/2011] [Revised: 09/21/2011] [Accepted: 09/21/2011] [Indexed: 01/28/2023]
Abstract
Cortical reorganizations during acquisition of motor skills and experience-dependent recovery after deafferentation consist of several distinct phases, in which expansion of receptive fields is followed by the shrinkage and use-dependent refinement. In perceptual learning, however, such non-monotonic, stage-dependent plasticity remains elusive in the sensory cortex. In the present study, microelectrode mapping characterized plasticity in the rat auditory cortex, including primary, anterior, and ventral/suprarhinal auditory fields (A1, AAF, and VAF/SRAF), at the early and late stages of appetitive operant conditioning. We first demonstrate that most plasticity at the early stage was tentative, and that long-lasting plasticity after extended training was able to be categorized into either early- or late-stage-dominant plasticity. Second, training-induced plasticity occurred both locally and globally with a specific temporal order. Conditioned-stimulus (CS) frequency used in the task tended to be locally over-represented in AAF at the early stage and in VAF/SRAF at the late stage. The behavioral relevance of neural responses suggests that the local plasticity also occurred in A1 at the early stage. In parallel, the tone-responsive area globally shrank at the late stage independently of CS frequency, and this shrinkage was also correlated with the behavioral improvements. Thus, the stage-dependent plasticity may commonly underlie cortical reorganization in the perceptual learning, yet the interactions of local and global plasticity have led to more complicated reorganization than previously thought. Field-specific plasticity has important implications for how each field subserves in the learning; for example, consistent with recent notions, A1 should construct filters to better identify auditory objects at the early stage, while VAF/SRAF contribute to hierarchical computation and storage at the late stage.
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Affiliation(s)
- H Takahashi
- Research Center for Advanced Science and Technology, The University of Tokyo, Komaba 4-6-1, Meguro-ku, Tokyo 153-8904, Japan.
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Kodama K, Okami J, Maeda J, Tokunaga T, Kanzaki R, Fujiwara A, Higashiyama M. [Complete resection of Pancoast tumor following induction chemoradiotherapy improves survival]. Kyobu Geka 2010; 63:9-15. [PMID: 20077826] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE Pancoast tumors are some of the most challenging thoracic malignant diseases to treat because of their proximity to vital structures at the thoracic inlet. We retrospectively analyzed 23 patients with pT3-4, N0-3 Pancoast tumors who underwent combined chest wall resection including the 1st rib, and discuss the anatomical considerations, assessment of induction therapy, and surgical approaches for these cancers. METHODS Between 1983 and 2006, 23 patients with Pancoast tumors underwent combined resection of the 1st rib at our institute. Of those, 21 were male and 2 were female, with an average age of 58 years. There were 10 each of squamous cell carcinoma and adenocarcinoma, 2 large cell carcinoma, and 1 adenosquamous carcinoma. Over the past decade, induction chemoradiotherapy (>40Gy) was employed before surgery. RESULTS A posterior approach was employed in 14 patients, an anterior approach in 7, and a combined anterior and posterior approach in 2. Sixteen patients underwent complete resection. One of 7 patients undergoing incomplete resection (4.3%) died on the 45th postoperative day. The 3- and 5-year survival rates were 50 and 22%, respectively, for patients with complete resection. No case survived for more than 8 months out of the 7 patients with incomplete resection. Fourteen patients with pN0 showed significantly better survival than those with pN1-3 (p = 0.0053). CONCLUSION Recent literature and our results suggest that patients with pN0 and/or a pathological complete response (pCR) after induction chemoradiotherapy could achieve long-term survival after complete resection.
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Affiliation(s)
- Ken Kodama
- Department of Thoracic Surgery, Osaka Medical Center for Cancer and Cardiovascular Diseases, Japan
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Suzurikawa J, Nakao M, Jimbo Y, Kanzaki R, Takahashi H. Light-Addressed Stimulation Under $\hbox{Ca}^{\bf 2+}$ Imaging of Cultured Neurons. IEEE Trans Biomed Eng 2009; 56:2660-5. [DOI: 10.1109/tbme.2009.2024314] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Chen R, Kanzaki H, Chiba M, Nishimura M, Kanzaki R, Igarashi K. Local osteoprotegerin gene transfer to periodontal tissue inhibits lipopolysaccharide-induced alveolar bone resorption. J Periodontal Res 2007; 43:237-45. [PMID: 18086145 DOI: 10.1111/j.1600-0765.2007.01021.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [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
BACKGROUND AND OBJECTIVE Osteoclastogenesis is primarily activated by receptor activator of nuclear factor kappaB ligand (RANKL) and is inhibited by osteoprotegerin (OPG). A previous study demonstrated that local OPG gene transfer to periodontal tissue inhibited RANKL-mediated osteoclastogenesis and experimental tooth movement. In the present study, we tested the hypothesis that local OPG gene transfer to the periodontium can neutralize RANKL activity induced by lipopolysaccharide injection, thereby inhibiting osteoclastogenesis and diminishing alveolar bone resorption in experimental periodontal disease. MATERIAL AND METHODS Seven-week-old male Wistar rats received an injection of lipopolysaccharide or phosphate-buffered saline in the palatal gingiva of the upper first molars on both the right and left sides. An inactivated haemagglutinating virus of Japan (HVJ) envelope vector containing a mouse OPG expression plasmid [pcDNA3.1(+)-mOPG] or mock vector was injected periodically into the palatal periodontal tissue of the upper first molars. RESULTS Lipopolysaccharide injection induced severe periodontal bone resorption. Local OPG gene transfer induced OPG production, and osteoclastogenesis was inhibited. Local OPG gene transfer significantly decreased alveolar bone resorption. CONCLUSION Osteoprotegerin gene transfer to periodontal tissue inhibited osteoclastogenesis and alveolar bone resorption in lipopolysaccharide-induced experimental periodontal disease.
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Affiliation(s)
- Rui Chen
- Division of Oral Dysfunction Science, Department of Oral Health and Developmenet Sciences, Graduate School of Dentistry, Tohoku University, Sendai, Japan
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Yokota R, Takahashi H, Funamizu A, Uchihara M, Suzurikawa J, Kanzaki R. Auditory cortical plasticity induced by intracortical microstimulation under pharmacological blockage of inhibitory synapses. Conf Proc IEEE Eng Med Biol Soc 2007; 2006:4929-32. [PMID: 17946661 DOI: 10.1109/iembs.2006.260281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Electrical stimulation that can reorganize our neural system has a potential for promising neurorehabilitation. We previously demonstrated that temporally controlled intracortical microstimulation (ICMS) could induce the spike time-dependant plasticity and modify tuning properties of cortical neurons as desired. A 'pairing' ICMS following tone-induced excitatory post-synaptic potentials (EPSPs) produced potentiation in response to the paired tones, while an 'anti-pairing' ICMS preceding the tone-induced EPSPs resulted in depression. However, the conventional ICMS affected both excitatory and inhibitory synapses, and thereby could not quantify net excitatory synaptic effects. In the present work, we evaluated the ICMS effects under a pharmacological blockage of inhibitory inputs. The pharmacological blockage enhanced the ICMS effects, suggesting that inhibitory inputs determine a plastic degree of the neural system. Alternatively, the conventional ICMS had an inadequate timing to control excitatory synaptic inputs, because inhibitory synapse determined the latency of total neural inputs.
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Affiliation(s)
- R Yokota
- Graduate Sch. of Inf. Sci. & Technol., Tokyo Univ., Meguro-ku, Tokyo, Japan.
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Konno Y, Daimaruya T, Iikubo M, Kanzaki R, Takahashi I, Sugawara J, Sasano T. Morphologic and hemodynamic analysis of dental pulp in dogs after molar intrusion with the skeletal anchorage system. Am J Orthod Dentofacial Orthop 2007; 132:199-207. [PMID: 17693370 DOI: 10.1016/j.ajodo.2005.07.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [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: 04/12/2005] [Revised: 07/11/2005] [Accepted: 07/18/2005] [Indexed: 11/17/2022]
Abstract
INTRODUCTION We have successfully treated skeletal open bite by intruding posterior teeth with the skeletal anchorage system. Our aim in this study was to morphologically and hemodynamically evaluate the changes in pulp tissues when molars are radically intruded. METHODS The mandibular fourth premolars of 9 adult beagle dogs were divided into 3 groups: a sham operated group (n = 6, 3 dogs), 4-month intrusion group (n = 6, 3 dogs), and a further 4-month retention group (n = 6, 3 dogs). We evaluated the morphological changes of the pulp and dentin-the amount of vacuolar degeneration in the odontoblast layer, the predentin width and nervous continuity in the pulp tissue, and the pulpal blood-flow response evoked by electrical stimulation in the dental pulp. RESULTS Extreme molar intrusion with the skeletal anchorage system caused slight degenerative changes in the pulp tissue, followed by recovery after the orthodontic force was released. Circulatory system and nervous functions were basically maintained during the intrusion, although a certain level of downregulation was observed. These morphologic and functional regressive changes in the pulp tissue after molar intrusion improved during the retention period. CONCLUSIONS Histologic changes and changes in pulpal blood flow and function are reversible, even during radical intrusion of molars.
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Affiliation(s)
- Yuichi Konno
- Division of Orthodontics and Dentofacial Orthopedics, Department of Oral Health and Development Sciences, Graduate School of Dentistry, Tohoku University, Sendai, Japan.
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Sakurai T, Yamagata T, Uchino K, Sezutsu H, Tamura T, Kanzaki R. 2.P2. Molecular cloning and expression pattern of elav-like genes from silkmoth, Bombyx mori. Comp Biochem Physiol A Mol Integr Physiol 2007. [DOI: 10.1016/j.cbpa.2007.06.023] [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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Kanzaki R, Emoto S, Minegishi E, Toriihara S, Kurabayashi D, Ando N, Takahashi H. 8.2. Insect–machine hybrid systems for analyzing adaptive behaviors. Comp Biochem Physiol A Mol Integr Physiol 2007. [DOI: 10.1016/j.cbpa.2007.06.081] [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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Kanzaki R, Daimaruya T, Takahashi I, Mitani H, Sugawara J. Remodeling of alveolar bone crest after molar intrusion with skeletal anchorage system in dogs. Am J Orthod Dentofacial Orthop 2007; 131:343-51. [PMID: 17346589 DOI: 10.1016/j.ajodo.2006.04.025] [Citation(s) in RCA: 17] [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: 11/01/2004] [Revised: 04/01/2006] [Accepted: 04/01/2006] [Indexed: 10/23/2022]
Abstract
INTRODUCTION The aim of this study was to clarify the influence of supra-alveolar fibers on alveolar bone crest remodeling when several teeth are intruded simultaneously. METHODS The skeletal anchorage system was used to bilaterally intrude the second and third premolars of 10 beagles; supracrestal fiberotomies were performed on 1 side only. RESULTS The amount of intrusion was greater and the amount of alveolar bone resorption was smaller in the fiberotomy group compared with the nonfiberotomy group. The health status (pocket depth <3 mm) of the dentogingival unit was maintained in the nonfiberotomy group during the experimental period. In the fiberotomy group, the number of osteoclasts on the marginal alveolar crest was less than in the nonfiberotomy group. The dense fiber bundles connecting the second and third premolars and the gingival attachments were maintained in the nonfiberotomy group. CONCLUSIONS Pressure from the supra-alveolar fibers generated by segmental molar intrusion with the skeletal anchorage system induced alveolar bone crest resorption and remodeling, and, as a result, it prevented deepening of the gingival pocket. Periodontal status was good during tooth intrusion.
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Affiliation(s)
- Reiko Kanzaki
- Division of Orthodontics and Dentofacial Orthopedics, Department of Oral Health and Development Sciences, Graduate School of Dentistry, Tohoku University, Sendai, Japan.
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Sugawara J, Kanzaki R, Takahashi I, Nagasaka H, Nanda R. Distal movement of maxillary molars in nongrowing patients with the skeletal anchorage system. Am J Orthod Dentofacial Orthop 2006; 129:723-33. [PMID: 16769490 DOI: 10.1016/j.ajodo.2005.08.036] [Citation(s) in RCA: 123] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2004] [Revised: 08/09/2005] [Accepted: 08/17/2005] [Indexed: 11/16/2022]
Abstract
INTRODUCTION It is now possible to predictably move maxillary molars distally in nongrowing patients with the skeletal anchorage system (SAS) and to improve malocclusions without having to extract the premolars and regardless of the patient's compliance. The purposes of this study were to investigate the amount of distal movement of the maxillary first molars, the type of movement, the difference between actual and predicted amounts of distalization, and the relationship between the amount of distalization and age. METHODS Twenty-five nongrowing patients (22 female, 3 male) successfully treated with the SAS were the subjects in this study. The amount and the type of distalization, the difference between predicted and resulting amounts of distalization, and the relationship between the patient's age and the amount of distalization were analyzed with wide-opening cephalometric radiographs. RESULTS The average amount of distalization of the maxillary first molars was 3.78 mm at the crown level and 3.20 mm at the root level. The amount of distalization at the crown level was significantly correlated with the average value of treatment goals (3.60 mm). CONCLUSIONS The maxillary molars were predictably distalized in accordance with the individualized treatment goals without regard to patient age and extraction of the third or second molars. The SAS is a viable noncompliance modality to move maxillary molars for distally correcting maxillary protrusions and malocclusions characterized by maxillary incisor crowding.
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Affiliation(s)
- Junji Sugawara
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, Sendai, Japan.
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Hiyama A, Ebe K, Kanzaki R, Tsukamoto K, Tsukuda T, Taguchi K, Mukae H, Tanaka N, Awaya H, Miura G, Matsumoto T, Matsunaga N. 3D Set-up Accuracy for Moving Pulmonary Tumors on a CT-on-Rails System Evaluated with Fluoroscopic Real-Time Tumor-Tracking System. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.843] [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: 10/25/2022]
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Ebe K, Shirato H, Hiyama A, Kanzaki R, Tsukamoto K, Ariga M, Karino Y, Mukae H, Matsumoto T, Matsunaga N. Integration of fluoroscopic real-time tumor-tracking system and tomographic scanner on the rail in the treatment room. Int J Radiat Oncol Biol Phys 2004. [DOI: 10.1016/j.ijrobp.2004.07.608] [Citation(s) in RCA: 3] [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: 10/26/2022]
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Ando N, Shimoyama I, Kanzaki R. A dual-channel FM transmitter for acquisition of flight muscle activities from the freely flying hawkmoth, Agrius convolvuli. J Neurosci Methods 2002; 115:181-7. [PMID: 11992669 DOI: 10.1016/s0165-0270(02)00013-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Moths can perform various flight maneuvers by the contraction of some direct and indirect flight muscles. Multi-channel recording from these flight muscles and analysis of their interaction is very important for understanding insect flight motor system. In this study, we developed a dual-channel FM transmitter for acquisition of muscle potentials, with which a male hawkmoth (Agrius convolvuli) could fly freely and perform pheromone triggered zigzag flight in a wind tunnel. The transmitter weighs only 0.25 g including single battery, has a 5 m receivable range and works for more than 30 min. Doubling channels was achieved by providing two oscillators (the carrier frequencies were 82 and 85 MHz), and interference between them was overcome by buffer amplifiers and independent reference electrodes for each channel. With this transmitter, we could acquire muscle potentials from some direct and indirect muscles during free flight. Combined with simultaneous high-speed video analysis, we observed distinct changes of motor patterns during takeoff. Our radio-telemetric system allows acquisition of actual information from freely flying moths; such information will lead to further progress in the study of insect flight.
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Affiliation(s)
- N Ando
- Institute of Biological Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan
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Abstract
Odor-induced oscillatory signals have been reported in odor discrimination in various insects. To understand dynamic olfactory coding in the first order olfactory center, the antennal lobe, localization of oscillatory signals was investigated using an optical recording technique with a voltage-sensitive dye. We present here the first report of visualization of the spatial distribution pattern of odor-induced oscillations in the bumblebee antennal lobe. Analysis of the odor-induced optical responses by a maximum entropy method allowed visualization of oscillatory regions in the antennal lobe. The oscillatory signals were usually localized to regions corresponding to a single or several glomerular structures. Our results suggest that glomerular structures may be functional units of odor processing from the viewpoint of odor-induced population responses, the oscillations.
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Affiliation(s)
- K Okada
- Institute of Biological Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
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31
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Shin M, Umebayashi Y, Kanzaki R, Ishiguro S. Formation of Copper(II) Thiocyanato and Cadmium(II) Iodo Complexes in Micelles of Nonionic Surfactants with Varying Poly(ethylene oxide) Chain Lengths. J Colloid Interface Sci 2000; 225:112-118. [PMID: 10767151 DOI: 10.1006/jcis.2000.6722] [Citation(s) in RCA: 11] [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: 11/22/2022]
Abstract
Formation of copper(II) thiocyanato and cadminum(II) iodo complexes in micelles of poly(ethylene oxide) (PEO)-type nonionic surfactants with varying PEO chain lengths of 9.5 (Triton X-100), 30 (Triton X-305), and 40 (Triton X-405) has been studied by titration spectrophotometry and calorimetry at 298 K. In a given surfactant solution, all data obtained were analyzed by assuming formation of ternary complexes MX(n)Y(m)((2-n)+) (M = Cu(II),Cd(II); X = SCN(-), I(-); Y = surfactant), and the complexes thus form in aqueous phase (m = 0) or in micelles (m = 1). In the Cu(II)-SCN(-) system, spectrophotometric data obtained by varying concentrations of the surfactant can be explained well in terms of formation of Cu(NCS)(2)Y in micelles and Cu(NCS)(+) and Cu(NCS)(2) in an aqueous phase, and it turned out that formation constant of Cu(NCS)(2)Y increases with increasing PEO chain length. In the Cd(II)-I(-) system, the formation of CdI(3)Y(-) and CdI(4)Y(2-) is concluded in micelles, and that of CdI(+), CdI(3)(-), and CdI(4)(2-) in an aqueous phase. Interestingly, formation enthalpies of CdI(3)Y(-) and CdI(4)Y(2-) become significantly less negative with increasing PEO chain length. This suggests that transfer of the complexes from aqueous solution to a hydrophobic octylphenyl (OP) moiety in micelles is significantly more exothermic than that to a hydrophilic PEO one. Thermodynamic parameters of transfer of CdI(3)(-) and CdI(4)(2-) from aqueous solution to the OP and PEO moieties of micelles have been evaluated. Copyright 2000 Academic Press.
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Affiliation(s)
- M Shin
- Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, 812-8581, Japan
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Abstract
In order to investigate the relation between situs asymmetry and functional asymmetry of the human brain, a consonant-vowel syllable dichotic listening test known as the Standard Dichotic Listening Test (SDLT) was administered to nine subjects with situs inversus (SI) that ranged in age from 6 to 46 years old (mean of 21.8 years old, S.D. = 15.6); the four males and five females all exhibited strong right-handedness. The SDLT was also used to study twenty four age-matched normal subjects that were from 6 to 48 years old (mean 21.7 years old, S.D. = 15.3); the twelve males and twelve females were all strongly right-handed and served as a control group. Eight out of the nine subjects (88.9%) with SI more often reproduced the sounds from the right ear than sounds from the left ear; this is called right ear advantage (REA). The ratio of REA in the control group was almost the same, i.e., nineteen out of the twenty-four subjects (79.1%) showed REA. Results of the present study suggest that the left-right reversal in situs inversus does not involve functional asymmetry of the brain. As such, the system that produces functional asymmetry in the human brain must independently recognize laterality from situs asymmetry.
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Affiliation(s)
- S Tanaka
- Department of Psychology, Kyoto University and Okatani Hospital, Nara, Japan.
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Ai H, Okada K, Hill ES, Kanzaki R. Spatio-temporal activities in the antennal lobe analyzed by an optical recording method in the male silkworm moth Bombyx mori. Neurosci Lett 1998; 258:135-8. [PMID: 9885949 DOI: 10.1016/s0304-3940(98)00863-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Optical recordings with a voltage-sensitive dye showed that the spatio-temporal pattern of depolarizing responses evoked by electrical stimulation of antennal nerve (AN) was non-homologously distributed in the antennal lobe (AL) of the male silkworm moth, Bombyx mori. Time courses of postsynaptic activities and GABAergic inhibitory potentials of AL neurons were individually demonstrated by pharmacological experiments, i.e. Ca2+ free and bicuculline conditions. GABAergic inhibitory potentials began with a ca. 3 ms delay from the beginning of the postsynaptic activities. Intensity of the postsynaptic activities and GABAergic inhibitory potentials were non-homologously distributed in the AL. Relatively strong postsynaptic activities and GABAergic inhibitory potentials were consistently observed in some parts of the macroglomerular complex (MGC) and/or in some ordinary glomeruli (Gs) in the medial and ventral part of the AL.
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Affiliation(s)
- H Ai
- Institute of Biological Sciences, University of Tsukuba, Ibaraki, Japan
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Mishima T, Kanzaki R. Coordination of flipflopping neural signals and head turning during pheromone-mediated walking in a male silkworm moth Bombyx mori. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 1998. [DOI: 10.1007/s003590050255] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
We have developed an improved optical recording technique with high spatio-temporal resolution to investigate neural activity from an in vivo insect brain. Optical images were acquired from hawk moth antennal lobe (AL) neurons. When activity was elicited by electrical stimulation of the antennal nerve using a stereoscopic microscope, depolarization followed by hyperpolarization was consistently recorded in the AL. When gamma-aminobutyric acid (GABA)-mediated synaptic transmission was blocked by the picrotoxin, the typical hyperpolarization was greatly reduced while no changes were observed in the depolarization. This suggests that the hyperpolarization results from inhibitory postsynaptic potentials (IPSPs) originating from GABA-sensitive chloride channels on the AL neurons.
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Affiliation(s)
- K Okada
- Research Development Corporation of Japan, Kawachi Millibioflight Project, Komaba Meguro, Japan.
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Abstract
Intracellular recording and staining with Lucifer yellow were used to characterize the responses and structure of pheromone-processing bilateral neurons in the protocerebrum of the brain of the male silkworm moth Bombyx mori. Numerous olfactory bilateral neurons innervated a particular neuropil region lateral to the central body, the lateral accessory lobe (LAL). The LALs are linked to each other by bilateral neurons with arborizations in each LAL. The LAL appears to be important for collecting the olfactory information from both sides of the brain. Many of the bilateral neurons showed a characteristic long-lasting excitation (LLE) that outlasted the olfactory stimuli (1.5 s). In some preparations, the LLE lasted more than 20 s and the firing gradually decreased to the background level.
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Affiliation(s)
- R Kanzaki
- Institute of Biological Sciences, University of Tsukuba, Ibaraki, Japan
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Kanzaki R, Arbas EA, Hildebrand JG. Physiology and morphology of descending neurons in pheromone-processing olfactory pathways in the male moth Manduca sexta. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 1991; 169:1-14. [PMID: 1941713 DOI: 10.1007/bf00198168] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
1. We have characterized the responses and structure of olfactory descending neurons (DNs) that reside in the protocerebrum (PC) of the brain of male sphinx moths Manduca sexta and project toward thoracic ganglia. 2. Excitatory responses of DNs to pheromone blends were of two general types: (a) brief excitation (BE) that recovered to background in less than 1 s after the stimulus, and (b) long-lasting excitation (LLE) that outlasted the stimulus by greater than or equal to 1 s and, in many cases, as long as 30 s. Individual pheromone components were ineffective in eliciting LLE. 3. Some neurons showing LLE also exhibited state-dependent responses to pheromonal stimuli. When such neurons were in a state of low background firing, stimulation with pheromone blend elicited LLE. When they were in a state of LLE, an identical stimulus reduced firing for 5-10 s after which firing gradually increased to the initial higher level. 4. Thirteen stained DNs were reconstructed from serial sections for detailed analysis of their morphology in the brain. DNs exhibiting LLE had neurites concentrated in the lateral accessory lobes (LALs) in the protocerebrum and adjacent neuropil. Most DNs exhibiting only BE to pheromonal stimuli and other DNs showing responses only to visual or mechanosensory stimuli did not have branches in the LALs.
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Affiliation(s)
- R Kanzaki
- Arizona Research Laboratories, Division of Neurobiology, University of Arizona, Tucson 85721
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Kanzaki R, Arbas EA, Hildebrand JG. Physiology and morphology of protocerebral olfactory neurons in the male moth Manduca sexta. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 1991; 168:281-98. [PMID: 2066906 DOI: 10.1007/bf00198348] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
1. We have used intracellular recording and staining with Lucifer Yellow, followed by reconstruction from serial sections, to characterize the responses and structure of olfactory neurons in the protocerebrum (PC) of the brain of the male sphinx moth Manduca sexta. 2. Many olfactory protocerebral neurons (PCNs) innervate a particular neuropil region lateral to the central body, the lateral accessory lobe (LAL), which appears to be important for processing olfactory information. 3. Each LAL is linked by its constituent neurons to the ipsilateral lateral PC, where projection neurons from the antennal lobe terminate, as well as to other regions of the PC. The LALs are also linked to each other by bilateral neurons with arborizations in each LAL. 4. Some PC neurons showed long-lasting excitation (LLE) that outlasted the olfactory stimuli by greater than or equal to 1 s, and as long as 30 s in some preparations. LLE was more frequently elicited by the sex-pheromone blend than by individual pheromone components. All bilateral neurons that showed LLE had arborizations in the LALs. LLE responses were also recorded in a single local neuron innervating the mushroom body. 5. In some other PC neurons, pheromonal stimuli elicited brief excitations that recovered to background firing rates less than 1 s after stimulation.
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Affiliation(s)
- R Kanzaki
- Arizona Research Laboratories, Division of Neurobiology, University of Arizona, Tucson 85721
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Kanzaki R, Arbas EA, Strausfeld NJ, Hildebrand JG. Physiology and morphology of projection neurons in the antennal lobe of the male moth Manduca sexta. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 1989; 165:427-53. [PMID: 2769606 DOI: 10.1007/bf00611233] [Citation(s) in RCA: 156] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
1. We have used intracellular recording and staining, followed by reconstruction from serial sections, to characterize the responses and structure of projection neurons (PNs) that link the antennal lobe (AL) to other regions of the brain of the male sphinx moth Manduca sexta. 2. Dendritic arborizations of the AL PNs were usually restricted either to ordinary glomeruli or to the male-specific macroglomerular complex (MGC) within the AL neuropil. Dendritic fields in the MGC appeared to belong to distinct partitions within the MGC. PNs innervating the ordinary glomeruli had arborizations in a single glomerulus (uniglomerular) or in more than one ordinary glomerulus of one AL (multiglomerular) or in one case, in single glomeruli in both ALs (bilateral-uniglomerular). One PN innervated the MGC and many or all ordinary glomeruli of the AL. 3. PNs with dendritic arborizations in the ordinary glomeruli and PNs associated with the MGC typically projected both to the calyces of the ipsilateral mushroom body and to the lateral protocerebrum, but some differences in the patterns of termination in those regions have been noted for the two classes of PNs. One PN conspicuously lacked branches in the calyces but did project to the lateral protocerebrum. The PN innervating the MGC and many ordinary glomeruli projected to the calyces of the ipsilateral mushroom body and the superior protocerebrum. 4. Crude sex-pheromone extracts excited all neurons with arborizations in the MGC, although some were inhibited by other odors. One P(MGC) was excited by crude sex-pheromone extract and by a mimic of one component of the pheromone blend but was inhibited by another component of the blend. 5. PNs with dendritic arborizations in ordinary glomeruli were excited or inhibited by certain non-pheromonal odors. Some of these PNs also responded to mechanosensory stimulation of the antennae. 6. The PN with dendritic arborizations in the MGC and many ordinary glomeruli was excited by crude sex-pheromone extracts and non-pheromonal odors and also responded to mechanosensory stimulation of the antenna.
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Affiliation(s)
- R Kanzaki
- Arizona Research Laboratories, Division of Neurobiology, University of Arizona, Tucson 85721
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40
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Abstract
Descending protocerebral neurons in the male silkworm moth brain responding to the sexual pheromone (Bombykol) were identified. The neurons responded well with a tonic type of response and the high-frequency spikes evoked continued even after the end of the stimulus. Characteristics of the dose-response curves of the neurons to the pheromone remarkably resembled those of the wing vibration which is one of the mating behavioral components of the male moths.
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Nakano M, Kanzaki R, Hayakawa M, Adachi M, Kawai M, Imadaka K, Takizuka H, Okayama K, Katsu M, Nose N, Notoya T, Takeda N. [Clinical studies of miloxacin for acute intestinitis (author's transl)]. Kansenshogaku Zasshi 1981; 55:819-25. [PMID: 6801153 DOI: 10.11150/kansenshogakuzasshi1970.55.819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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42
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Okayama K, Kanzaki R, Adachi M, Sohma T, Kawai M, Fujii T, Takizuka H, Nakano M, Katsu M, Okui S, Imadaka K. [Lung cavity associated with Mycoplasma pneumoniae infection (author's transl)]. Kansenshogaku Zasshi 1980; 54:836-840. [PMID: 6788865 DOI: 10.11150/kansenshogakuzasshi1970.54.836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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