144 results on '"Yutaka SANO"'
Search Results
2. The medial tangent of the proximal tibia is a suitable extra-articular landmark in determining the tibial anteroposterior axis
- Author
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Hyunho Lee, Takanobu Sumino, Takashi Suzuki, Yutaka Sano, Noriyuki Endo, Yingshih Chang, Hirohisa Fujimaki, Keinosuke Ryu, and Kazuyoshi Nakanishi
- Subjects
Tibia ,Rotation ,Reference ,Total knee arthroplasty ,Joint revision ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Abstract Background Tibial rotational alignment in total knee arthroplasty (TKA) is generally determined based on intra-articular structure, and can be difficult to ascertain in some cases. The aim of this study was to investigate whether the medial tangent angle of the tibia (MTAT) could be useful in determining the anteroposterior axis of the tibia. Methods This study was performed on 103 lower limbs in 53 patients who underwent primary total hip arthroplasty. The selection criteria for our study were based on the assumption that knees in patients undergoing THA exhibit fewer degenerative changes than knees in patients undergoing TKA. Using computed tomography images, the MTAT, comprising the medial tangent of the proximal tibia and the anteroposterior (AP) axis of the tibia, was measured on three horizontal planes: at the distal edge of the tibial tubercle (A), at 5 cm distally (B), and at 10 cm further distally (C). The tibial medial surface was grouped into three classes according to shape: valley type, flat type, and hill type. The percentage at which these shapes were observed in each group was also calculated. Measurement reliability was calculated using the intraclass correlation coefficient. Results The angles were 45.2° (interquartile range: IR 43.0–47.7) at A, 42.7° (IR 38.7–45.9) at B, and 42.4° (IR 38.2–45.9) at C. Intra-rater reliability and inter-rater reliability was 0.982 and 0.974 at A, 0.810 and 0.411 at B, and 0.940 and 0.811 at C, respectively. Regarding the tibial medial surface, the valley type was observed in all cases at A, and the hill type was observed in the highest percentage of cases at B and C. Conclusions The MTAT was approximately 45° at level A, and reproducibility was the highest among the three groups. The two points forming the valley on the tibial medial surface were bony ridges. Therefore, the medial tangent of the tibia at level A could be easily determined. Because the distal edge of the tibial tubercle exists at the surgical area and the extra-articular area, it can be a suitable intraoperative, extra-articular landmark in determining the tibial AP axis, even for revision TKA.
- Published
- 2021
- Full Text
- View/download PDF
3. Higher PGD2 production by synovial mast cells from rheumatoid arthritis patients compared with osteoarthritis patients via miR-199a-3p/prostaglandin synthetase 2 axis
- Author
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Shintaro Mishima, Jun-ichi Kashiwakura, Shota Toyoshima, Tomomi Sasaki-Sakamoto, Yutaka Sano, Kazuyoshi Nakanishi, Kenji Matsumoto, and Yoshimichi Okayama
- Subjects
Medicine ,Science - Abstract
Abstract We previously reported that synovial mast cells (MCs) from patients with rheumatoid arthritis (RA) produced TNF-α in response to immune complexes via FcγRI and FcγRIIA. However, the specific functions of synovial MCs in RA remain unclear. This study aimed to elucidate those functions. Synovial tissues and fluid were obtained from RA and osteoarthritis (OA) patients undergoing joint replacement surgery. Synovium-derived, cultured MCs were generated by culturing dispersed synovial cells with stem cell factor. We performed microarray-based screening of mRNA and microRNA (miRNA), followed by quantitative RT-PCR-based verification. Synovial MCs from RA patients showed significantly higher prostaglandin systhetase (PTGS)1 and PTGS2 expression compared with OA patients’ MCs, and they produced significantly more prostaglandin D2 (PGD2) following aggregation of FcγRI. PGD2 induced IL-8 production by human group 2 innate lymphoid cells, suggesting that PGD2-producing MCs induce neutrophil recruitment into the synovium of RA patients. PTGS2 mRNA expression in RA patients’ MCs correlated inversely with miRNA-199a-3p expression, which down-regulated PTGS2. RA patients’ synovial fluid contained significantly more PGD2 compared with OA patients’ fluid. Synovial MCs might regulate inflammation in RA through hyper-production of PGD2 following FcRγ aggregation. Our findings indicate functional heterogeneity of human MCs among diseases.
- Published
- 2021
- Full Text
- View/download PDF
4. The medial tangent of the proximal tibia is a suitable extra-articular landmark in determining the tibial anteroposterior axis
- Author
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Takashi Suzuki, Yutaka Sano, Keinosuke Ryu, Takanobu Sumino, Kazuyoshi Nakanishi, Yingshih Chang, Hyunho Lee, Noriyuki Endo, and Hirohisa Fujimaki
- Subjects
musculoskeletal diseases ,medicine.medical_specialty ,Reference ,Knee Joint ,Rotation ,Intraclass correlation ,Total knee arthroplasty ,Diseases of the musculoskeletal system ,Proximal tibia ,03 medical and health sciences ,0302 clinical medicine ,Rheumatology ,Humans ,Medicine ,Orthopedics and Sports Medicine ,In patient ,Tibia ,Rotational alignment ,030222 orthopedics ,business.industry ,Reproducibility of Results ,Tangent ,030229 sport sciences ,Anatomy ,Osteoarthritis, Knee ,musculoskeletal system ,RC925-935 ,Joint revision ,Orthopedic surgery ,business ,Research Article - Abstract
BackgroundTibial rotational alignment in total knee arthroplasty (TKA) is generally determined based on intra-articular structure, and can be difficult to ascertain in some cases. The aim of this study was to investigate whether the medial tangent angle of the tibia (MTAT) could be useful in determining the anteroposterior axis of the tibia.MethodsThis study was performed on 103 lower limbs in 53 patients who underwent primary total hip arthroplasty. The selection criteria for our study were based on the assumption that knees in patients undergoing THA exhibit fewer degenerative changes than knees in patients undergoing TKA. Using computed tomography images, the MTAT, comprising the medial tangent of the proximal tibia and the anteroposterior (AP) axis of the tibia, was measured on three horizontal planes: at the distal edge of the tibial tubercle (A), at 5 cm distally (B), and at 10 cm further distally (C). The tibial medial surface was grouped into three classes according to shape: valley type, flat type, and hill type. The percentage at which these shapes were observed in each group was also calculated. Measurement reliability was calculated using the intraclass correlation coefficient.ResultsThe angles were 45.2° (interquartile range: IR 43.0–47.7) at A, 42.7° (IR 38.7–45.9) at B, and 42.4° (IR 38.2–45.9) at C. Intra-rater reliability and inter-rater reliability was 0.982 and 0.974 at A, 0.810 and 0.411 at B, and 0.940 and 0.811 at C, respectively. Regarding the tibial medial surface, the valley type was observed in all cases at A, and the hill type was observed in the highest percentage of cases at B and C.ConclusionsThe MTAT was approximately 45° at level A, and reproducibility was the highest among the three groups. The two points forming the valley on the tibial medial surface were bony ridges. Therefore, the medial tangent of the tibia at level A could be easily determined. Because the distal edge of the tibial tubercle exists at the surgical area and the extra-articular area, it can be a suitable intraoperative, extra-articular landmark in determining the tibial AP axis, even for revision TKA.
- Published
- 2021
5. Higher PGD2 production by synovial mast cells from rheumatoid arthritis patients compared with osteoarthritis patients via miR-199a-3p/prostaglandin synthetase 2 axis
- Author
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Jun-ichi Kashiwakura, Yutaka Sano, Tomomi Sasaki-Sakamoto, Shota Toyoshima, Kazuyoshi Nakanishi, Yoshimichi Okayama, Shintaro Mishima, and Kenji Matsumoto
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0301 basic medicine ,Science ,Prostaglandin ,Inflammation ,Osteoarthritis ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Medicine ,Synovial fluid ,Multidisciplinary ,business.industry ,Innate lymphoid cell ,medicine.disease ,humanities ,030104 developmental biology ,chemistry ,Synovial Cell ,030220 oncology & carcinogenesis ,Rheumatoid arthritis ,Immunology ,Prostaglandin D2 ,medicine.symptom ,business - Abstract
We previously reported that synovial mast cells (MCs) from patients with rheumatoid arthritis (RA) produced TNF-α in response to immune complexes via FcγRI and FcγRIIA. However, the specific functions of synovial MCs in RA remain unclear. This study aimed to elucidate those functions. Synovial tissues and fluid were obtained from RA and osteoarthritis (OA) patients undergoing joint replacement surgery. Synovium-derived, cultured MCs were generated by culturing dispersed synovial cells with stem cell factor. We performed microarray-based screening of mRNA and microRNA (miRNA), followed by quantitative RT-PCR-based verification. Synovial MCs from RA patients showed significantly higher prostaglandin systhetase (PTGS)1 and PTGS2 expression compared with OA patients’ MCs, and they produced significantly more prostaglandin D2 (PGD2) following aggregation of FcγRI. PGD2 induced IL-8 production by human group 2 innate lymphoid cells, suggesting that PGD2-producing MCs induce neutrophil recruitment into the synovium of RA patients. PTGS2 mRNA expression in RA patients’ MCs correlated inversely with miRNA-199a-3p expression, which down-regulated PTGS2. RA patients’ synovial fluid contained significantly more PGD2 compared with OA patients’ fluid. Synovial MCs might regulate inflammation in RA through hyper-production of PGD2 following FcRγ aggregation. Our findings indicate functional heterogeneity of human MCs among diseases.
- Published
- 2021
6. Higher PGD
- Author
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Shintaro, Mishima, Jun-Ichi, Kashiwakura, Shota, Toyoshima, Tomomi, Sasaki-Sakamoto, Yutaka, Sano, Kazuyoshi, Nakanishi, Kenji, Matsumoto, and Yoshimichi, Okayama
- Subjects
Male ,Histamine Release ,Dinoprostone ,Article ,Arthritis, Rheumatoid ,Osteoarthritis ,Synovial Fluid ,Humans ,Lymphocytes ,Mast Cells ,RNA, Messenger ,Rheumatoid arthritis ,Cells, Cultured ,Aged ,Aged, 80 and over ,Prostaglandin D2 ,Gene Expression Profiling ,Interleukin-8 ,Receptors, IgG ,Synovial Membrane ,Fibroblasts ,Middle Aged ,humanities ,Immunity, Innate ,MicroRNAs ,Gene Expression Regulation ,Cyclooxygenase 2 ,Cyclooxygenase 1 ,Female ,Signal Transduction - Abstract
We previously reported that synovial mast cells (MCs) from patients with rheumatoid arthritis (RA) produced TNF-α in response to immune complexes via FcγRI and FcγRIIA. However, the specific functions of synovial MCs in RA remain unclear. This study aimed to elucidate those functions. Synovial tissues and fluid were obtained from RA and osteoarthritis (OA) patients undergoing joint replacement surgery. Synovium-derived, cultured MCs were generated by culturing dispersed synovial cells with stem cell factor. We performed microarray-based screening of mRNA and microRNA (miRNA), followed by quantitative RT-PCR-based verification. Synovial MCs from RA patients showed significantly higher prostaglandin systhetase (PTGS)1 and PTGS2 expression compared with OA patients’ MCs, and they produced significantly more prostaglandin D2 (PGD2) following aggregation of FcγRI. PGD2 induced IL-8 production by human group 2 innate lymphoid cells, suggesting that PGD2-producing MCs induce neutrophil recruitment into the synovium of RA patients. PTGS2 mRNA expression in RA patients’ MCs correlated inversely with miRNA-199a-3p expression, which down-regulated PTGS2. RA patients’ synovial fluid contained significantly more PGD2 compared with OA patients’ fluid. Synovial MCs might regulate inflammation in RA through hyper-production of PGD2 following FcRγ aggregation. Our findings indicate functional heterogeneity of human MCs among diseases.
- Published
- 2020
7. Activation of inflammation and resolution pathways of lipid mediators in synovial fluid from patients with severe rheumatoid arthritis compared with severe osteoarthritis
- Author
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Shota Toyoshima, Yutaka Sano, Yoshimi Miki, Yoshimichi Okayama, Yoshitaka Taketomi, Hyunho Lee, Shu Saito, Mana Ito, and Makoto Murakami
- Subjects
Pathology ,medicine.medical_specialty ,Inflammation ,Dermatology ,Osteoarthritis ,Protectin D1 ,030207 dermatology & venereal diseases ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Oxidized fatty acid ,medicine ,Immunology and Allergy ,Synovial fluid ,Rheumatoid arthritis ,Specialized pro-resolving lipid mediator ,Liquid chromatography-tandem mass spectrometry/mass spectrometry ,biology ,business.industry ,Lipid signaling ,medicine.disease ,030228 respiratory system ,chemistry ,Lipid mediator ,biology.protein ,Arachidonic acid ,Original Article ,Cyclooxygenase ,medicine.symptom ,business - Abstract
Background The upregulation of the cyclooxygenase and lipoxygenase pathways of arachidonic acid is thought to be involved in the development of rheumatoid arthritis. Recently, the presence of specialized pro-resolving lipid mediators in synovial tissues from patients with osteoarthritis has been reported. Objective To clarify the quantitative and qualitative changes in lipid mediators in the synovium of severe rheumatoid arthritis patients, we compared the profiles of lipid mediators in synovial fluid obtained from patients with severe rheumatoid arthritis and from those with severe osteoarthritis. Methods We enrolled 18 patients with rheumatoid arthritis and 26 patients with osteoarthritis. All the patients had undergone total knee replacement surgery. Synovial fluid samples had been obtained during the surgery. Lipid profiling in the synovial fluid from these patients was performed using liquid chromatography-tandem mass spectrometry/mass spectrometry. Results Among the 150 oxidized fatty acids examined so far, 119 were substantially detected in synovial fluid from the patients. Not only the concentrations of pro-inflammatory lipid mediators such as prostaglandins and leukotrienes, but also those of specialized pro-resolving lipid mediators such as lipoxins, resolvins, and protectin D1 were significantly higher in synovial fluid obtained from rheumatoid arthritis patients than from synovial fluid obtained from osteoarthritis patients. Conclusion The activation of both inflammation and resolution pathways of lipid mediators might be a fatty acid signature in the synovial fluid of patients with severe rheumatoid arthritis. Inflammatory, anti-inflammatory and pro-resolving mediators in synovial fluid could be good biomarkers for differentiating between severe rheumatoid arthritis and severe osteoarthritis.
- Published
- 2020
8. Treatment of cloth with a fabric softener ameliorates skin dryness
- Author
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Ikuo Sugano, Keiichi Yamanaka, Tomomi Yamada, Hitoshi Mizutani, Takashi Kitahara, Koji Umeda, Yutaka Takagi, Yutaka Sano, Ken-ichi Isoda, and Kumi Umeda-Togami
- Subjects
Transepidermal water loss ,medicine.medical_specialty ,integumentary system ,Erythema ,business.industry ,Fabric softener ,Dermatology ,General Medicine ,Atopic dermatitis ,medicine.disease ,Visual grading ,medicine.anatomical_structure ,Dry skin ,medicine ,Stratum corneum ,Dryness ,medicine.symptom ,business - Abstract
Dry skin is a condition characterized by impaired skin barrier function including atopic dermatitis and senile eczemas. Fabric softening chemicals (FSC) smoothens the surface of fabrics and thus decreases friction with the skin. Scientific evaluation of fabric softener on skin dryness is very limited. We evaluated the effectiveness and safety of FSC-treated T-shirts in subjects with dry skin. This is a randomized double-blind control study that included 40 male volunteers with apparent dry skin. Subjects were randomly divided into two groups: 20 men received 28 pieces of FSC-treated T-shirts wearing them for 4 weeks, and another 20 men received non-treated T-shirts. The effect of trial was evaluated by visual grading, subjective symptom, stratum corneum water content (SCWC), transepidermal water loss (TEWL), and dermoscopic skin surface analysis on days 0, 7, 14 and 28. A significant improvement of SCWC was observed in the skin of the shoulder (days 7-28) and lateral abdomen (day 14) wearing the treated T-shirts, but not in the non-treated T-shirts. In a stratified analysis of the low and high SCWC group, significant improvement was identified in the low SCWC groups but not in high SCWC groups. The visual grading of the shoulder improved significantly in the treated T-shirts group. No significant improvement was found in TEWL, dermoscopic analysis and subjective symptom in both groups. No remarkable side-effect was identified throughout this investigation. Addition of a fabric softener during clothes laundering is a potent preventive tool for dry skin.
- Published
- 2010
9. Laser Bending of Thin Metal Plate
- Author
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Yutaka Sano, Tsuyoshi Tokunaga, Yoshihiro Tanaka, Tadashi Misu, Shunro Yoshioka, and Toshiyuki Miyazaki
- Subjects
Materials science ,Thin metal ,Composite material ,Laser bending - Abstract
バックリングモードによるレーザ曲げ加工では, 板がどちら側に曲がるか予測できないことが実用化の大きな障害となっている. 試料の寸法や形状が曲げ特性に与える影響について検討し, 初期弾性変形を与えることにより曲げ方向が制御できることを見出し, レーザ照射条件と曲げ角度の実験式を導いた.
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- 2005
10. Treatment of cloth with a fabric softener ameliorates skin dryness
- Author
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Kenichi, Isoda, Yutaka, Takagi, Takashi, Kitahara, Yutaka, Sano, Ikuo, Sugano, Kumi, Umeda-Togami, Koji, Umeda, Keiichi, Yamanaka, Tomomi, Yamada, and Hitoshi, Mizutani
- Subjects
Adult ,Male ,Pruritus ,Textiles ,Middle Aged ,Skin Diseases ,Clothing ,Dermatitis, Atopic ,Young Adult ,Body Water ,Double-Blind Method ,Erythema ,Humans ,Organic Chemicals ,Aged ,Laundering - Abstract
Dry skin is a condition characterized by impaired skin barrier function including atopic dermatitis and senile eczemas. Fabric softening chemicals (FSC) smoothens the surface of fabrics and thus decreases friction with the skin. Scientific evaluation of fabric softener on skin dryness is very limited. We evaluated the effectiveness and safety of FSC-treated T-shirts in subjects with dry skin. This is a randomized double-blind control study that included 40 male volunteers with apparent dry skin. Subjects were randomly divided into two groups: 20 men received 28 pieces of FSC-treated T-shirts wearing them for 4 weeks, and another 20 men received non-treated T-shirts. The effect of trial was evaluated by visual grading, subjective symptom, stratum corneum water content (SCWC), transepidermal water loss (TEWL), and dermoscopic skin surface analysis on days 0, 7, 14 and 28. A significant improvement of SCWC was observed in the skin of the shoulder (days 7-28) and lateral abdomen (day 14) wearing the treated T-shirts, but not in the non-treated T-shirts. In a stratified analysis of the low and high SCWC group, significant improvement was identified in the low SCWC groups but not in high SCWC groups. The visual grading of the shoulder improved significantly in the treated T-shirts group. No significant improvement was found in TEWL, dermoscopic analysis and subjective symptom in both groups. No remarkable side-effect was identified throughout this investigation. Addition of a fabric softener during clothes laundering is a potent preventive tool for dry skin.
- Published
- 2011
11. Distribution of the endogenous digitalis-like substance (EDLS)-containing neurons labeled by digoxin antibody in hypothalamus and three circumventricular organs of dog and macaque
- Author
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Manabu Yoshimura, Norihiko Ihara, Hisao Yamada, Hakuo Takahashi, and Yutaka Sano
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Male ,Digoxin ,medicine.medical_specialty ,animal structures ,Central nervous system ,Hypothalamus ,Radioimmunoassay ,Biology ,Macaque ,Supraoptic nucleus ,Infundibulum ,Dogs ,Species Specificity ,Internal medicine ,biology.animal ,medicine ,Animals ,Molecular Biology ,Circumventricular organs ,Neurons ,musculoskeletal, neural, and ocular physiology ,General Neuroscience ,Blood Proteins ,Saponins ,musculoskeletal system ,Immunohistochemistry ,Subfornical organ ,Cardenolides ,Endocrinology ,medicine.anatomical_structure ,nervous system ,Macaca ,Female ,Neurology (clinical) ,Sodium-Potassium-Exchanging ATPase ,Supraoptic Nucleus ,tissues ,Nucleus ,Subfornical Organ ,Developmental Biology - Abstract
Endogenous digitalis-like substance (EDLS) is a newly discovered humoral agent which causes sodium-diuresis. EDLS is well known to have inhibitory activity to Na+,K(+)-ATPase and cross-immunoreactivity to digoxin antibody; however, its precise chemical structure has not yet been determined. We had previously developed a histochemical technique for EDLS, i.e., digoxin-immunohistochemistry, and demonstrated that EDLS was produced in the hypothalamic neurons. In the present study, the distribution of EDLS-containing neurons in the hypothalamus of dog and macaque was investigated using this technique, because anti-EDLS antibody cannot be obtained yet. In both species, EDLS neuronal somata were mainly localized in the paraventricular nucleus and the supraoptic nucleus and its accessory nuclei. A number of somata were also scattered in the other hypothalamic areas. The processes of these neurons ran from the area where the somata were located, through the lateral and basal area of the hypothalamus, to the infundibulum. These nerve fibers with varicosities were associated with the primary capillaries of hypophysial portal veins. A few immunopositive nerve fibers were also seen in the pituitary posterior lobe of both species. Intensive immunoreactivities were observed in the subfornical organ and organum vasculosum laminae terminalis. There were no differences between dog and macaque.
- Published
- 1992
12. Immunohistochemical study on gastrin-releasing peptide-containing peripheral nerve fibers in rat, macaque and human
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Masahiro Kato, Yutaka Sano, Mitsuhiro Kawata, Masaharu Takeyama, Shigeki Hitomi, Haruaki Yajima, and Hisao Yamada
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Male ,Physiology ,Respiratory System ,Nerve fiber ,Biology ,digestive system ,Jejunum ,Nerve Fibers ,Heart Conduction System ,Gastrin-releasing peptide ,Adventitia ,Gastrins ,medicine ,Animals ,Humans ,Peripheral Nerves ,Esophagus ,Aged ,Aged, 80 and over ,Lamina propria ,Lung ,General Neuroscience ,Anatomy ,Immunohistochemistry ,Rats ,medicine.anatomical_structure ,Gastrin-Releasing Peptide ,Peripheral nervous system ,Macaca ,Female ,Neurology (clinical) ,Peptides ,Digestive System ,hormones, hormone substitutes, and hormone antagonists - Abstract
Distribution of gastrin-releasing peptide (GRP)-containing peripheral nerve fibers in the respiratory organs, digestive tracts and hearts of rat, monkey and human was studied with immunohistochemical method. In the trachea, GRP-immunoreactive nerve fibers were observed in the lamina propria and surrounded ducts and acini of tracheal serous glands with a basket-like appearance. In the lung, immunoreactive nerve fibers were scattered in the lamina propria of bronchi and bronchioles, and also the adventitia of veins. In the digestive organs, such as esophagus, duodenum and jejunum, numerous GRP-immunoreactive nerve fibers were distributed in the lamina propria and muscle layer; especially in the former layer where they were seen running up to the apical part of villi. GRP-containing nerve bundles and branched fibers were also observed in the atrial muscle layer. These results gave a morphological basis to future studies of the functional significance of GRP on autonomic mechanisms.
- Published
- 1991
13. Collateral sprouting of serotonergic fibers in the cingulate cortex and the septum following cortical-hippocampal lesions
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Mitsuhiro Kawata, Shuichi Ueda, and Yutaka Sano
- Subjects
Male ,Cingulate cortex ,Serotonin ,Posterior parietal cortex ,Hippocampus ,Hippocampal formation ,Serotonergic ,Gyrus Cinguli ,Nerve Fibers ,medicine ,Animals ,Molecular Biology ,business.industry ,General Neuroscience ,Septal nuclei ,Rats, Inbred Strains ,Anatomy ,Collateral sprouting ,Immunohistochemistry ,Nerve Regeneration ,Rats ,medicine.anatomical_structure ,Forebrain ,Septum Pellucidum ,Neurology (clinical) ,business ,Neuroscience ,Developmental Biology - Abstract
The parietal cortex and dorsal hippocampus of adult rats were unilaterally ablated. One and 3 months after this operation, changes in serotonergic fiber distribution in the forebrain were studied immunohistochemically. At 1 month, increased numbers of serotonergic fibers were seen in the cingulate cortex and the medial and lateral septal nuclei of the lesioned side. This increase continued to 3 months in the ipsilateral cingulate cortex. In the present study, two different processes of serotonergic fiber collateral sprouting were noted. Plastic changes in serotonergic fibers in the ipsilateral septal nuclei and cingulate cortex may be attributable to the collateral sprouting underlying reactive synaptogenesis and the pruning effect, respectively.
- Published
- 1991
14. Localization and regulation of mRNAs in the nervous tissue as revealed by in situ hybridization
- Author
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Yutaka Sano, Kazunari Yuri, and Mitsuhiro Kawata
- Subjects
Nervous system ,Immunology ,Neuropeptide ,Nerve Tissue Proteins ,In situ hybridization ,Biology ,Nervous System ,chemistry.chemical_compound ,medicine ,Animals ,Humans ,Tissue Distribution ,RNA, Messenger ,Neurotransmitter ,Receptor ,Pharmacology ,Messenger RNA ,Nervous tissue ,Neuropeptides ,Nucleic Acid Hybridization ,Cell biology ,medicine.anatomical_structure ,chemistry ,Neuroglia ,Neuroscience - Abstract
1. In situ hybridization histochemistry permits the study of specific mRNAs of neuropeptides, enzymes involved in the synthesis of neurotransmitters, receptors and proteins associated with glial cells in nervous tissue. 2. The central and peripheral nervous systems are composed of heterogeneous elements and specific regulatory mechanisms occur in specific cells. 3. This review will focus on the localization and regulation of different mRNAs in the nervous system from Drosophila to human, as revealed by in situ hybridization histochemistry.
- Published
- 1991
15. Quantitativein situ hybridization to measure single-cell changes in vasopressin and oxytocin mRNA levels after osmotic stimulation
- Author
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Yutaka Sano, Joseph T. McCabe, Mitsuhiro Kawata, Robert A. Desharnais, and Donald W. Pfaff
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Hypothalamo-Hypophyseal System ,medicine.medical_specialty ,Vasopressin ,Osmotic shock ,Vasopressins ,Population ,Neuropeptide ,In situ hybridization ,Biology ,Oxytocin ,Supraoptic nucleus ,Cellular and Molecular Neuroscience ,Internal medicine ,medicine ,Animals ,RNA, Messenger ,education ,Saline Solution, Hypertonic ,education.field_of_study ,Nucleic Acid Hybridization ,Rats, Inbred Strains ,Cell Biology ,General Medicine ,Water-Electrolyte Balance ,Rats ,Endocrinology ,Gene Expression Regulation ,Hypothalamus ,Female ,medicine.drug - Abstract
1. The measurement of cellular mRNA content by quantitativein situ hybridization is a valuable approach to the study of gene expression in brain since this tissue exhibits a high degree of phenotypic heterogeneity. 2. The cellular content of vasopressin and oxytocin mRNA in hypothalamo-neurohypophysial system neurons was altered by maintaining rats for 24 hr on 2% sodium chloride water. 3. Statistical and graphical techniques were then used to analyze cell by cell how mRNA levels were altered as a result of osmotic stimulation. We propose that the negative binomial probability distribution is a suitable model to describe how mRNA content varies across a defined cell population. For both measures of oxytocin and vasopressin mRNA levels, maximum-likelihood estimation indicated that this model adequately described empirical findings obtained from rats drinking tap water or salt water. 4. Both graphical and statistical analyses suggested how the defined neural system responds to osmotic stimulation: mRNA content was altered as a multiplicative function of “initial state.” The utility and limitations of the quantitative approach are discussed.
- Published
- 1990
16. Rearrangement of serotonin-immunoreactive fibers in the denervated rat suprachiasmatic nucleus after transplantation of fetal raphe tissue
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Yutaka Sano, Toshikuni Tanabe, Shuichi Ueda, and Norihiko Ihara
- Subjects
Male ,Serotonin ,endocrine system ,medicine.medical_specialty ,Histology ,Biology ,Serotonergic ,Pathology and Forensic Medicine ,Internal medicine ,medicine ,Animals ,Raphe ,Suprachiasmatic nucleus ,Graft Survival ,Rats, Inbred Strains ,Cell Biology ,Immunohistochemistry ,Rats ,Transplantation ,Endocrinology ,medicine.anatomical_structure ,nervous system ,Hypothalamus ,Raphe Nuclei ,Suprachiasmatic Nucleus ,Raphe nuclei ,Brain Stem ,Reinnervation - Abstract
Pieces of fetal midbrain raphe tissue were transplanted into the third ventricle or the ventral hypothalamic region near the suprachiasmatic nucleus (SCN) of adult host rats that had previously been denervated by treatment with 5,6-dihydroxytryptamine. The ability of grafted serotonin neurons to reinnervate the SCN in the host rats was studied by means of immunohistochemistry 1 and 3 months after transplantation. In both the intraventricular and intraparenchymal transplant experiments, reinnervation by outgrowing serotonin fibers was observed in the hypothalamus of host rats at 1 and 3 months after surgery. At both survival periods, there was no abundant arborization of serotonin fibers in the SCN, while the preoptic and periventricular areas of the host rats displayed a pattern of serotonergic innervation resembling that in normal (untreated) rats. It is suggested that within the SCN the regenerating serotonin fibers may be exposed to an inhibitory environment.
- Published
- 1990
17. 707 Thermoelastic Finite Element Stress Analysis in Two-Dimensional Functionally Graded Material Nose Cone to Thermal Stress Relaxation
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Yutaka Sano, Yoshiiro Sugano, and Masato Wakeda
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Materials science ,Thermoelastic damping ,Relaxation (physics) ,Composite material ,Finite element stress analysis ,Functionally graded material ,Nose cone - Published
- 2010
18. Forming of Metal Thin Plate with Diode Laser
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Yutaka Sano, Toshiyuki Miyazaki, Shunro Yoshioka, Tuyosi Tokunaga, and Tadashi Misu
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Metal ,Materials science ,law ,business.industry ,visual_art ,visual_art.visual_art_medium ,Optoelectronics ,Laser ,business ,Vertical-cavity surface-emitting laser ,law.invention ,Diode - Published
- 2003
19. Transplantation of fetal mesencephalic and medullary raphe tissues into the cerebellum of denervated adult rats--an immunohistochemical study
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Yutaka Sano, Norihiko Ihara, Shuichi Ueda, and Toshikuni Tanabe
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Male ,Cerebellum ,Serotonin ,Tyrosine 3-Monooxygenase ,Biology ,Serotonergic ,Laminar organization ,Cerebellar Cortex ,Dorsal raphe nucleus ,Fetal Tissue Transplantation ,Mesencephalon ,medicine ,Animals ,Brain Tissue Transplantation ,Molecular Biology ,Neurons ,Medulla Oblongata ,Raphe ,General Neuroscience ,Serotonergic cell groups ,Rats, Inbred Strains ,Anatomy ,Denervation ,Immunohistochemistry ,Rats ,Transplantation ,surgical procedures, operative ,medicine.anatomical_structure ,nervous system ,Cerebellar cortex ,Neurology (clinical) ,5,6-Dihydroxytryptamine ,Developmental Biology - Abstract
Pieces of mesencephalic and medullary raphe tissues were transplanted into the cerebella of 5,6-dihydroxytryptamine-treated adult rats. The extent of axonal outgrowth of serotonergic and dopaminergic neurons in the grafts was immunohistochemically studied. At 3 months after transplantation, numerous dopaminergic neurons with many processes extending within the graft were detected in the mesencephalic raphe graft, but not in the medullary raphe graft. In contrast, both the mesencephalic and medullary raphe grafts contained numerous serotonergic neurons and a dense plexus of their fibers. The outgrowing serotonergic fibers from the mesencephalic raphe graft showed a hyperinnervation pattern in the cerebellar cortex adjacent to the graft. Furthermore, a glomerulus-like accumulation of serotonergic fibers was observed in the granular layer. In the cases of medullary raphe grafts, the relatively abundant outgrowing serotonergic fibers showed a laminar organization in the cerebellar cortex near the graft, which was similar to the normal distributional pattern. These results indicate that serotonergic and dopaminergic neurons located within the mesencephalic raphe graft clearly differed from each other in their ability to extend their processes into the host cerebellum, which provides further evidence for the existence of specific interactions between outgrowing serotonergic fibers and their terminal fields (targets).
- Published
- 1991
20. Localization and regulation of mRNAs in the nervous tissue as revealed by in situ hybridization
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Mitsuhiro, Kawata, primary, Kazunari, Yuri, additional, and Yutaka, sano, additional
- Published
- 1991
- Full Text
- View/download PDF
21. Effects of Preparing Conditions on the Recording Properties of Double-layered Perpendicular Rigid Disk
- Author
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Yoshihisa Nakamura, Isao Watanabe, Yutaka Sano, and Hiroaki Muraoka
- Subjects
Materials science ,Double layered ,Perpendicular ,Electrical and Electronic Engineering ,Composite material ,Condensed Matter Physics ,Instrumentation ,Electronic, Optical and Magnetic Materials - Published
- 1994
22. Distribution of estrogen receptor in the brain of normal, ovariectomized, and castrated rat
- Author
-
Mitsuhiro Kawata, Yutaka Sano, and Kazunari Yuri
- Subjects
medicine.medical_specialty ,Estrogen-related receptor alpha ,Endocrinology ,Chemistry ,Internal medicine ,medicine ,Ovariectomized rat ,Estrogen receptor ,Distribution (pharmacology) ,General Medicine ,Estrogen receptor alpha ,Estrogen receptor beta - Published
- 1990
23. Histochemical studies on 'neurosteroids'
- Author
-
Yutaka Sano and Hisao Yamada
- Subjects
Neuroactive steroid ,General Medicine - Published
- 1990
24. Distribution of peptides and 5-HT containing neurons in the porcine spinal cord
- Author
-
Mitsuhiro Kawata, Kenzo Kumamoto, Yutaka Sano, and Makoto Hirakawa
- Subjects
medicine.anatomical_structure ,Chemistry ,Biophysics ,medicine ,Distribution (pharmacology) ,General Medicine ,Spinal cord ,5-HT receptor - Published
- 1990
25. Immunohistochemical identification of serotonin, FMRFamide, and vasotocin in the abdominal ganglion of Aplysia kurodai
- Author
-
Shuichi Ueda, Mitsuhiro Kawata, Yutaka Sano, and Chikafusa Bessho
- Subjects
medicine.medical_specialty ,Vasotocin ,General Medicine ,Biology ,chemistry.chemical_compound ,Endocrinology ,chemistry ,Abdominal ganglion ,Internal medicine ,medicine ,Immunohistochemistry ,Identification (biology) ,Serotonin ,FMRFamide ,Aplysia kurodai - Published
- 1990
26. [Untitled]
- Author
-
Yutaka SANO, Mitsuo SUGAWARA, and Izumi ITO
- Published
- 1986
27. Ontogenesis of the central serotonin neuron system of the rat — An immunohistochemical study
- Author
-
Yutaka Sano and Motoko Goto
- Subjects
Central Nervous System ,Serotonin ,medicine.medical_specialty ,Ontogeny ,Central nervous system ,Gestational Age ,Biology ,Internal medicine ,medicine ,Animals ,Adult stage ,Neurons ,Fetus ,Histocytochemistry ,Immunochemistry ,General Neuroscience ,fungi ,food and beverages ,Rats, Inbred Strains ,Embryo ,General Medicine ,Paramedian pontine reticular formation ,Embryo, Mammalian ,Rats ,Endocrinology ,medicine.anatomical_structure ,Animals, Newborn ,Metencephalon - Abstract
The peroxidase-antiperoxidase technique was used to study the ontogenesis of serotonin-containing neurons in fetal, neonatal and adult rats. Serotonin-containing neurons were first detected in a rat embryo of crown-rump length (CRL) 5 mm, bilaterally distributed in the ventral metencephalon near the isthmus rhombencephali. Serotonin fibers were first detected in CRL 6 mm embryos. There was a rapid increase in serotonin-immunoreactive neurons of embryos of 7–8 mm CRL. Serotonin neurons appeared initially as independent, bilateral groups of neurons, but as early as CRL 16 mm, the adult mid-line distribution was present, while the neurons that occurred as single groups in the adult already existed as single groups or at least were only partially connected across the mid-line. A continuous distribution of serotonin neurons was observed in the mesencephalic and pontine reticular formation from CRL 13 mm to the adult stage. It is suggested that the rapid increase in serotonin neurons at 7 and 8 mm CRL is associated with the completion of mitosis which occurs at this time.
- Published
- 1984
28. RAPID COMMUNICATION
- Author
-
Yutaka Sano, Hisao Yamada, and Norihiko Ihara
- Subjects
Kidney ,medicine.medical_specialty ,biology ,Adrenal gland ,digestive, oral, and skin physiology ,Central nervous system ,General Engineering ,Endogeny ,Macaque ,Infundibulum ,Endocrinology ,medicine.anatomical_structure ,Hypothalamus ,biology.animal ,Internal medicine ,medicine ,Immunohistochemistry - Abstract
Morphological investigation of the endogenous digitals-like substance (EDLS) characterized as a natriuretic humoral agent has not been carried out to date; but EDLS can be detected indirectly by immunohistochemistry using cross-reactivity with digoxin-antibody. In this report, the brain and other organs of the rat and macaque were immunostained using commercially supplied digoxin-specific antibodies. The immunoreactive substances were mainly observed in the neurons of hypothalamic paraventricular and supraoptic nuclei, and varicose fibers in some areas of the hypothalamus and infundibulum. No immunopositive substances were detected in the pituitary anterior lobe, adrenal gland, or kidney of the rat.
- Published
- 1987
29. Contents, Vol. 132, 1988
- Author
-
Teen-Meei Wang, Silvia Lucrecia Dahinten, Minoru Nomoto, Shuichi Ueda, Felix R. Moreno, W. Lierse, Fatma A. Moustafa, Yuichi Kato, Mitsuhiro Kawata, Shinichiro Miyake, Akira Ikeda, P. Tonner, Yuji Yaku, N. Umeda, Elizabeth M. Hill, Carole S. Wink, J. Arroyo-Guijarro, C. Costa-Llobet, Toshio Yoshihara, Ann M.C. Burgess, Toshio Kaneko, Tai-Hua Lo, Héctor M. Pucciarelli, Yutaka Sano, A. Ikeda, Robert J. Wordinger, Norihiko Ihara, Kazuo Ikeda, Mark D. Sherman, Alberto Prats-Galino, Chung Shih, Andrzej W. Fryczkowski, Chung-Fu Chao, Sugio Hayama, D. Ruano-Gil, Takashi Kanda, and Hiroshi Nagata
- Subjects
Histology ,Anatomy - Published
- 1988
30. Immunohistochemical Study on the Distribution of Serotonin-Containing Cell Bodies in the Brain Stem of the Dog
- Author
-
Yutaka Sano, Yoshihiro Takeuchi, Munekado Kojima, and M. Goto
- Subjects
Male ,Serotonin ,Pathology ,medicine.medical_specialty ,Histology ,CATS ,Anatomy ,Biology ,Serotonergic ,Immunoenzyme Techniques ,Dogs ,Cell bodies ,medicine ,Animals ,Raphe Nuclei ,Distribution (pharmacology) ,Immunohistochemistry ,Female ,Raphe nuclei ,Brain Stem - Abstract
The distribution of serotonin-containing neurons in the brain of the dog was studied by use of PAP immunohistochemistry. The lower brain stem was endowed with extensively scattered serotonergic cell bodies, a large portion of which was located in the raphe nuclei. At the same time, prominent distribution of serotonergic neurons in lateral areas outside the raphe nuclei was also demonstrated. Our observations on the brain stem were, in principle, consistent with those on rats, cats and monkeys, with only minor differences.
- Published
- 1983
31. Two Types of Oxytocin and Vasopressin Nerve Fibers in the Intra- and Extrahypothalamic Neuronal Systems as Revealed by Immunohistochemistry
- Author
-
Shuichi Ueda, Mitsuhiro Kawata, and Yutaka Sano
- Subjects
Male ,Hypothalamo-Hypophyseal System ,medicine.medical_specialty ,Vasopressin ,Histology ,Swine ,Vasopressins ,Guinea Pigs ,Neurotransmission ,Biology ,Oxytocin ,Dogs ,Nerve Fibers ,Internal medicine ,medicine ,Animals ,Mammals ,Histocytochemistry ,Neuronal somata ,Immunochemistry ,Rats, Inbred Strains ,Haplorhini ,Rats ,Endocrinology ,nervous system ,Cats ,Immunohistochemistry ,Female ,Rabbits ,Anatomy ,Neuroscience ,hormones, hormone substitutes, and hormone antagonists ,medicine.drug - Abstract
The oxytocin and vasopressin nerve fibers in the intra- and extrahypothalamic neuronal systems of several mammalian brains are immunohistochemically demonstrated using a modified peroxidase-antiperoxidase technique. The axonal processes of these peptidergic neurons are classified into thick and thin beaded fibers. Thick beaded fibers were preferentially distributed in the hypothalamo-neurohypophysial tract and in some circum-ventricular organs, with termination on the blood vessels. Thin beaded fibers were found in various extrahypothalamic areas and these terminals were in the vicinity of the neuronal somata of such areas. This report suggests that there are at least two different functions concerning neurotransmission in the oxytocin and vasopressin neuronal system.
- Published
- 1983
32. Genital Paget's Disease: A Histological Study of the Tumor Margin
- Author
-
Shizuo Sato, Hideaki Saeki, Tohru Hara, Michiko Tasaki, Mitsuo Sugawara, Izumi Ito, Hideo Sakuma, and Yutaka Sano
- Subjects
Male ,Pathology ,medicine.medical_specialty ,Skin Neoplasms ,Dermatology ,Lesion ,Depigmentation ,Tumor margin ,Biopsy ,medicine ,Humans ,Sex organ ,Aged ,medicine.diagnostic_test ,business.industry ,General Medicine ,medicine.disease ,Anus ,Paget s disease ,Paget Disease, Extramammary ,medicine.anatomical_structure ,Genital Neoplasms, Male ,Scrotum ,medicine.symptom ,business ,Infiltration (medical) - Abstract
The lesion of genital Paget's disease usually shows pigmentation, depigmentation, erosion and tumor formation. Skin surrounding the lesion looks normal macroscopically. We call this junction between the resion and surrounding skin the macroscopic margin. The mapping of 3 male cases of genital Paget's disease showed complicated infiltration patterns on the skin surface. We classified these infiltration patterns into 3 types. From a study of preparations according to this classification, we found the recommendable to make a wide excision of the tumor, including the surrounding area reaching more than 3 to 5 cm from the macroscopic margin, since this margin is not reliable in deciding the optimal extent of resection. Moreover, it is recommended that unnecessary resection should be avoided by performing close biopsy preoperatively, especially when there is infiltration around the anus, and that histological examination of the whole margin of the resected tissue be made.
- Published
- 1987
33. Serotonin distribution in the circumventricular organs of the rat
- Author
-
Yoshihiro Takeuchi and Yutaka Sano
- Subjects
Male ,Nialamide ,Serotonin ,Embryology ,Pathology ,medicine.medical_specialty ,Biology ,Immunoenzyme Techniques ,medicine ,Animals ,Distribution (pharmacology) ,Circumventricular organs ,Histocytochemistry ,Area postrema ,Rats, Inbred Strains ,Cell Biology ,Neurosecretory Systems ,Subfornical organ ,Rats ,medicine.anatomical_structure ,Immunohistochemistry ,Subcommissural Organ ,Anatomy ,Subcommissural organ ,Subfornical Organ ,Developmental Biology ,medicine.drug - Abstract
Serotonin-immunoreactive structures in the circumventricular organs (organum vasculosum laminae terminalis, subfornical organ, subcommisural organ and area postrema) of the rat were demonstrated using a modified peroxidase-antiperoxidase immunohistochemical method. Various densities of serotonin fibers were demonstrated in all four circumventricular organs; however, serotonin-positive cells were evident in the area postrema only after nialamide treatment. Serotonergic supraependymal fibers were observed on the surface of the organum vasculosum laminae terminalis and that of the subfornical organ, but not on the subcommissural organ and area postrema. The organ, but not on the subcommissural organ and area postrema. The serotonergic plexus of the basal portion of the subcommisural organ was considered to be continuous with the supraependymal plexus.
- Published
- 1983
34. THE INFLUENCE OF 6-OHDA UPON IMMATURE DOPAMINE CONTAINING NEURON OF THE CENTRAL NERVOUS SYSTEM OF THE RAT
- Author
-
Yutaka Sano, Tadao Matsuura, Yasuhiko Ibata, Yoshiaki Nojyo, and Takashi Inoue
- Subjects
medicine.medical_specialty ,animal structures ,Histology ,Physiology ,Dopaminergic ,Central nervous system ,Caudate nucleus ,Substantia nigra ,Cell Biology ,Anatomy ,Biology ,Biochemistry ,Pathology and Forensic Medicine ,Endocrinology ,medicine.anatomical_structure ,nervous system ,Dopamine ,Internal medicine ,medicine ,Immunohistochemistry ,Neuron ,medicine.drug - Abstract
The influence of 6-OHDA on the nigro-neostriatal dopaminergic system of the rat from birth to 45 days after birth was investigated with respect to the completion of the BBB to DA. The caudate nucleus and substantia nigra of infant rats were examined by Falck-Hillarp's fluorescence histochemistry and electron microscopy. The most pronounced decrease of DA fluorescence was detected in rats in whom 6-OHDA was repeatedly administered between the end of the first week to the middle of the second week after birth. DA fluorescence also began to decrease gradually in rats after administration of 6-OHDA in the middle of the second week. No further change, however, occurred in DA neurons of rats treated with 6-OHDA at the end of the second post natal week. It was determined that the BBB to DA began to be constituted from the middle of the second week after birth. We also conjectured that 6-OHDA had no potentiality to produce irreversible degeneration of DA neurons in infant animals, since DA fluorescence recovered to the same level as the controls in rats surviving for 4 to 6 weeks after administration of 6-OHDA during the first and second weeks after birth.
- Published
- 1974
35. Ultrastructure of the serotonergic nerve terminals in the suprachiasmatic and interpeduncular nuclei of rat brains
- Author
-
Yutaka Sano and Yoshiaki Nojyo
- Subjects
Male ,Serotonin ,Interpeduncular nucleus ,General Neuroscience ,Hypothalamus ,Dendrites ,Anatomy ,Biology ,Serotonin metabolism ,Serotonergic ,Axons ,Rats ,Mesencephalon ,Nerve Degeneration ,Ultrastructure ,Animals ,Synaptic Vesicles ,Neurology (clinical) ,Supraoptic Nucleus ,Molecular Biology ,Neuroscience ,5,6-Dihydroxytryptamine ,Developmental Biology - Published
- 1978
36. Serotonergic innervation on the motoneurons in the mammalian brainstem
- Author
-
Yutaka Sano, Tadao Matsuura, Yoshihiro Takeuchi, and Munekado Kojima
- Subjects
Male ,Serotonin ,Embryology ,Pathology ,medicine.medical_specialty ,Guinea Pigs ,Population ,Extraocular muscles ,Serotonergic ,Mice ,Dogs ,biology.animal ,medicine ,Animals ,Primate ,education ,Motor Neurons ,Nucleus ambiguus ,education.field_of_study ,biology ,Histocytochemistry ,Cranial nerves ,Cranial Nerves ,Dendrites ,Cell Biology ,Anatomy ,Rats ,Microscopy, Electron ,medicine.anatomical_structure ,Oculomotor Muscles ,Cats ,Macaca ,Brainstem ,Brain Stem ,Developmental Biology - Abstract
A comparative study of serotonergic innervation on motoneurons in the brainstem of various mammals (mouse, rat, guinea pig, dog, cat and monkey) was carried out using a sensitive immunohistochemical method. Except for the extraocular muscle nuclei, the motor nuclei of the cranial nerves received rich inputs from serotonin neurons, in all species examined--rodent, carnivore and primate. The motoneurons of the monkey were innervated by varicose serotonin fibers, in a manner different from that of other species, i.e. their cell bodies and proximal dendrites were tightly encircled by a large number of serotonin-containing varicose fibers. At the ultrastructural level, a predominant population of axosomatic contacts was confirmed in the cranial motor nuclei of the monkey, particularly in the nucleus ambiguus.
- Published
- 1983
37. Distribution of serotonin nerve cells in the rabbit brain - Immunohistochemistry by the two-step ABC technique using biotin-labeled rabbit serotonin-antibody
- Author
-
Hisao Yamada and Yutaka Sano
- Subjects
Male ,Serotonin ,medicine.medical_specialty ,Interpeduncular nucleus ,Pathology ,Histology ,Biotin ,Biology ,Reticular formation ,Immunoenzyme Techniques ,Internal medicine ,medicine ,Animals ,Brain Mapping ,Raphe ,Area postrema ,Medial lemniscus ,Brain ,Endocrinology ,nervous system ,Hypothalamus ,Female ,Rabbits ,Anatomy ,Raphe nuclei - Abstract
The distribution of serotonin neuronal somata in the brain of the rabbit was demonstrated by use of immunoperoxidase technique. The serotonin antibody obtained from a rabbit was applied with the two-step ABC (avidin-biotin-peroxidase complex) method after biotinylation of this antibody. The location, shape, size and immunoreactivity of these somata were clarified in our permanent preparations without non-specific and background staining. These perikarya were distributed in the raphe nuclei, linear nuclei and interpeduncular nucleus, within and around the medial lemniscus, in the mesencephalic periaqueductal grey lateral to the raphe dorsalis, and in the reticular formation of the brain stem. However the so-called "masked indolamine cells" were not observed in the hypothalamus or the area postrema, as our experimental animals were not given any pharmacological pretreatment. These results were essentially similar to those from other mammalian species, especially the rat.
- Published
- 1985
38. Histological and Cytological Studies on the Liquor Contacting Peptidergic Neurons in the Preoptic Nucleus of the Japanese Eel (Anguilla japonica)
- Author
-
Mitsuhiro Kawata and Yutaka Sano
- Subjects
Histology ,Ependymal Cell ,Tight junction ,Cell ,Anatomy ,Biology ,biology.organism_classification ,Cell biology ,Preoptic area ,Cell nucleus ,medicine.anatomical_structure ,nervous system ,Cytoplasm ,medicine ,Japanese eel ,Neuron - Abstract
Liquor contacting peptidergic neurons (LCPNs) in the preoptic nucleus of the Japanese eel (Anguilla japonica), are investigated submacroscopically, light microscopically, electron microscopically (transmission and scanning) and histochemically. LCPNs appear in 8--13 per cent of all neurons constituting the preoptic nucleus and their cytoplasm contains many secretory granules stained by aldehyde-thionin or chrome hematoxylin. LCPNs have an epithelial cell-like polarity and their cytoplasmic organella shift to the supranuclear region. LCPNs are classified into three types (A, B, C) according to the liquor contacting portion of the cell: Granular type A neuron (40--50 x 40--50 microns 2), the cell of which is in contact with the cerebrospinal fluid (CSF), is the most common type and distributed in the ventral portion of the preoptic nucleus; this neuron is not connected with the neighboring ependymal cells by tight junctions. Bipolar type B neuron (60 x 30 micron 2), contacts the CSF with the tip of it cell process and is scattered throughout the preoptic nucleus; the cell is connected with the surrounding ependymal cells by tight junction. Bipolar type C neuron (60 x 30 micron 2) possesses a cell process protruded into the third ventricle and is distributed in the dorsal portion of the preoptic nucleus; this also is connected with the adjacent ependymal cells by tight junction. Regardless of type, all LCPNs exhibit a positive acetylcholinesterase and a negative ATPase reaction. Numerous fluorescent varicosities of monoaminergic nerve terminals are closely associated with the cell bodies of the LCPN. LCPNs are likely regulated by monoaminergic fibers.
- Published
- 1979
39. Direct Projection from the Medial Preoptic Area to the Median Eminence of the Cat
- Author
-
Yasuhiko Ibata, Yoshiaki Nojyo, Yutaka Sano, and Kiminao Mizukawa
- Subjects
Male ,Hypothalamo-Hypophyseal System ,Hypothalamus ,Efferent Pathways ,Gonadotropin-Releasing Hormone ,Lesion ,Catecholamines ,Endocrinology ,Projection (mathematics) ,medicine ,Animals ,Dense cored vesicles ,Nerve Endings ,Chemistry ,Median Eminence ,General Engineering ,Anatomy ,Preoptic Area ,Medial preoptic area ,Preoptic area ,nervous system ,Median eminence ,Nerve Degeneration ,Cats ,Female ,medicine.symptom ,Free nerve ending - Abstract
The projection from the medial preoptic area to the median eminence of the cat was clarified by electron microscopy. After placing the electrolytic lesion in the preoptic area several kinds of degenerating neuronal processes and terminals were observed in the external layer of the median eminence. The one was dark shrunk terminals containing dense cored vesicles, the other was the dark ones containing myeline figure-like structure. The relationship between catecholamine-containing nerve endings and RH/IH-containing endings in the external layer of the median eminence was discussed.
- Published
- 1977
40. Immunohistochemical studies on the processes of serotonin neurons and their ramification in the central nervous system-with regard to the possibility of the existence of golgi's rete nervosa diffusa
- Author
-
Yutaka Sano, Tadao Matsuura, Yoshihiro Takeuchi, Motoko Goto, Munekado Kojima, Shuichi Ueda, Mitsuhiro Kawata, Hiroshi Kimura, and Hisao Yamada
- Subjects
Serotonin ,Carps ,Histology ,Central nervous system ,Biology ,Cerebral Ventricles ,symbols.namesake ,Nerve Fibers ,medicine ,Animals ,Axon ,Brain Chemistry ,Neurons ,Plexus ,Dendrites ,Haplorhini ,Anatomy ,Golgi apparatus ,Axons ,Rats ,medicine.anatomical_structure ,nervous system ,Reticular connective tissue ,Cats ,symbols ,Neuron ,Raphe nuclei ,Chickens ,Brain Stem - Abstract
Using various vertebrates from teleost to macacus, we studied, by the modified PAP method, the serotonin neurons that are distributed mainly in the raphe nuclei area, focussing on their process ramifications, and obtained the following results. 1. The shapes of serotonin neurons were varied. They were multipolar with many long, thick dendrites. In most of the neurons, more than two axons originated either from the stem of a dendrite or from its tip. 2. The axons contained spherical or spindle-shaped varicosities of varied sizes (diameter 0.5-6 micron). On a few occasions, they became large, Herring body-like droplets. 3. The axons were classified into four groups according to the shape and size of the varicosities they contained: stem fibers, A-fibers (tract fibers), B-fibers (branching fibers) and C-fibers (ground fibers). 4. The axon not only branched frequently, but formed a true network by way of frequent anastomosis at the level of B- and C-fibers. Serotonin fibers do not have endings that correspond to telodendrons, but conduct impulses through "en passant" type synapses. 5. A supraependymal plexus is formed over large areas of the ventricular system. This vast network is considered to be formed by the syncytial continuity of axonal reticulum of many serotonin neurons. 6. Serotonin neurons, and probably noradrenaline neurons as well, should be classified as a third type of neuron, which belong to neither the Deiters type nor the Golgi type neuron. Their characteristic feature is the long, reticular axons, and it is highly probable that this neuron system forms the "rete nervosa diffusa" proposed by GOLGI.
- Published
- 1982
41. GENERAL SESSION
- Author
-
Kazuya Abbey, Hayato Kawakami, Takeo Kobayashi, Hiroshi Hirano, Hiromichi ABE, Yasunobu TOMIDA, Junzo OCHI, Morimi SHIMADA, Kazuharu IENAGA, Hiroshi KIMURA, Junko Akiyama, Koh Kawagoe, Takashi Kawana, Masaya Araki, Kouichiro Umemoto, Nobukazu ARAKI, Masao LEE, Yoichiro TAKASHIMA, Kazuo OGAWA, Tsutomu Araki, Akira Yamamoto, Youko Asaka, Jun Watanabe, Kazuo Kanai, Shinsuke Kanamura, T. DAIMON, K. KAWAI, K. UCHIDA, Naoto Doi, Nobuo Moriyama, Eiji Higashihara, Isao Murahashi, Yoshio Aso, Osamu FUJIMORI, Azuma TSUKISE, Kazuyori YAMADA, Akimune FUKUSHIMA, Toshihiko IZUTSU, Morimasa MATSUDA, Teruo KAGABU, Iwao NISHIYA, Sadayuki FUNATSUMARU, Nobuhisa YONEMITSU, Hajime SUGIHARA, Yasushi Furuta, Toshiya Shinohara, Kimiaki Sano, Mizuho Meguro, Kazuo Nagashima, HAN Minghu, PIAO Yingjie, Makoto HARA, Yoshinobu HOSHINO, Nobuo MORIYAMA, Masayuki HARA, Kayoko YAMASHITA, Yumi ISHIGE, Takuro SUZUKI, Hideaki HASEGAWA, Hideo TSUKAMOTO, Keiichi WATANABE, Hiroshi HIKITA, Keizo KAGAWA, Takeshi DEGUCHI, Takayuki TAKEUCHI, Hisashi TADA, Kazuo SAKABE, Masayuki MIZUMO, Masafumi MATSUMOTO, Takeshi OKANOUE, Kei KASHIMA, Tsukasa ASHIHARA, Tomoko HIRABAYASHI, Kazunori ISHIMURA, Hideaki TSURI, Hisao FUJITA, Makoto HIRAKAWA, Mitsuhiro KAWATA, Yutaka SANO, Yoshiaki HIRAYAMA, Tsugio AMEMIYA, Tajimi HIROHATA, Tetsuzo KUMAMOTO, Yohei HOSOKAWA, Kazushi ISETANI, Kazuhiko TOKITA, Shoji MITSUFUJI, Toshio TANI, Kyohei MARUYAMA, Tadashi KODAMA, Yasunari TSUCHIHASHI, H. Ichimal, T. Makita, Yukio ICHTANI, Sadatsugu MURAKAMI, Hitoshi OKAMURA, Ikuko NAGATSU, Noboru YANAIHARA, Yasuhiko IBATA, Hiroaki IGARASHI, Kenichirou INOMATA, Kaori IHIDA, Shinichiro TSUYAMA, Fusayoshi MURATA, Takuo IKEDA, Sakon NORIKI, Norio MIYOSHI, Hisataka KATO, Yoshiaki IMAMURA, Kazuo NAKANISHI, Kazuo MIYAZAWA, Toru HIROSE, Shirou KIMURA, Masaru FUKUDA, Kikuko Imamoto, Hiroyuki SUGIHARA, Toshihiko INUI, Yuji NAKA, Tetsuji SHOJI, Yoshio IZUNO, Airo TSUBURA, Sotokichi MORII, Keiko ISHIII, Takayuki HONDA, Tsutomu KATSUYAMA, Atsuko ITO, Masamichi ITO, Nobuaki ITO, Katsuji NISHI, Mitsuru NAKAJIMA, Yoshiro OKAMURA, Tadaomi HIROTA, Masaki IWAI, Motomu KASHIWADANI, Megumi Iwano, E-iti Yokomura, Hirohiko IWATSUKI, Kazushige UEDA, Masayuki MIZUNO, and Yoko KAMEDA
- Subjects
Histology ,Physiology ,Cell Biology ,Biochemistry ,Pathology and Forensic Medicine - Published
- 1989
42. DIFFERENT ONTOGENESIS OF α-ENDORPHIN POSITIVE CELLS IN THE ANTERIOR AND THE INTERMEDIATE LOBES OF RAT HYPOPHYSIS
- Author
-
Naoki Sakura, Yasuhiko Ibata, Yutaka Sano, Chizuko Yanaihara, Minoru Tanaka, Noboru Yanaihara, H.L. Obata, and Kenji Watanabe
- Subjects
medicine.medical_specialty ,Histology ,Endocrinology ,Rat Hypophysis ,Physiology ,Chemistry ,Internal medicine ,Ontogeny ,medicine ,Cell Biology ,Biochemistry ,Pathology and Forensic Medicine - Published
- 1980
43. Immunohistochemical Demonstration of Serotonin-Containing Nerve Fibers in the Mammalian Hippocampal Formation
- Author
-
Shuichi Ueda, Yutaka Sano, Norihiko Ihara, and Mitsuhiro Kawata
- Subjects
Male ,Serotonin ,medicine.medical_specialty ,Histology ,Central nervous system ,Hamster ,Hippocampus ,Rhinencephalon ,Biology ,Hippocampal formation ,Immunoenzyme Techniques ,chemistry.chemical_compound ,Dogs ,Nerve Fibers ,Cricetinae ,Internal medicine ,biology.animal ,medicine ,Animals ,Neurotransmitter ,Mesocricetus ,Sciuridae ,Rats, Inbred Strains ,Immunohistochemistry ,Rats ,Cell biology ,Chipmunk ,medicine.anatomical_structure ,Endocrinology ,nervous system ,chemistry ,Cats ,Macaca ,Anatomy - Abstract
The distributional pattern of serotonin-immunoreactive nerve fibers in the hippocampal formation of six different mammalian species (rat, chipmunk, hamster, cat, dog and monkey) was studied in detail by means of a modified peroxidase-antiperoxidase immunohistochemical method, using a specific serotonin antiserum. Furthermore, the density of varicosities distributed in each layer of the hippocampus was semiquantitatively analyzed. In all species investigated, the routes of serotonin fibers entering the hippocampal formation were found to be almost the same. These fibers were extensively distributed throughout the hippocampal formation, and had a characteristic arrangement corresponding to the laminar structure of this region. A dense innervation by varicose serotonin fibers was found in the stratum lacunosum-moleculare, but a few serotonin fibers were also distributed in the stratum lucidum of the CA2 and CA3 fields. The stratum pyramidale and the granule cell layer of the dentate gyrus contained a small number of serotonin fibers. The concentration and the direction of serotonin fibers were different in each area of each animal. Two peculiar observations should be stressed: (1) in the rat, the strata oriens and radiatum of CA2 and CA3 as well as the stratum lacunosum-moleculare displayed abundant serotonin fibers; (2) in the dog, abundant serotonin fibers were diffusely distributed in the CA1 field except for the stratum pyramidale and the most dense concentratioi > of serotonin fibers was seen in the stratum oriens of CA3.The present study provides a morphological basis for further study of the functional significance of serotonin in the limbic system.
- Published
- 1988
44. Brain natriuretic peptide in the porcine spinal cord: an immunohistochemical investigation of its localization and the comparison with atrial natriuretic peptide, substance p, calcitonin gene-related peptide, and enkephalin
- Author
-
K. Kangawa, H. Matsuo, Makoto Hirakawa, N. Minamino, Kenzo Kumamoto, Yutaka Sano, and Mitsuhiro Kawata
- Subjects
Male ,medicine.medical_specialty ,Swine ,medicine.drug_class ,Calcitonin Gene-Related Peptide ,Central nervous system ,Neuropeptide ,Nerve Tissue Proteins ,Substance P ,Calcitonin gene-related peptide ,Atrial natriuretic peptide ,Internal medicine ,Natriuretic Peptide, Brain ,medicine ,Natriuretic peptide ,Animals ,Chemistry ,General Neuroscience ,Neuropeptides ,Enkephalins ,Spinal cord ,Brain natriuretic peptide ,medicine.anatomical_structure ,Endocrinology ,Spinal Cord ,Calcitonin ,Atrial Natriuretic Factor - Abstract
Immunohistochemistry was used to localize brain natriuretic peptide in the porcine spinal cord and to compare it with that of atrial natriuretic peptide, substance P, calcitonin gene-related peptide and [Met]enkephalin. Brain natriuretic peptide-immunoreactive varicose fibers were observed in lamina I and the inner portion of lamina II of the dorsal horn. Semiquantitative analysis showed that the highest density of brain natriuretic peptide-immunoreactive varicosities was in the lumbosacral and coccygeal segments. The distributional pattern of brain natriuretic peptide-immunoreactive nerve fibers in the spinal cord was unique and quite distinct from that of the other neuropeptides studied. These neuroanatomical findings suggest that brain natriuretic peptide may play a role in the regulation of nociceptive processing in the spinal cord, either alone or with bioactive substances.
- Published
- 1989
45. DECAY MECHANISM OF THE 1-HYDRO-4-PHENYLPYRIDINYL RADICAL
- Author
-
Shozo Tero-Kubota, Osamu Ito, Yusaku Ikegami, and Yutaka Sano
- Subjects
Chemistry ,General Chemistry ,Photochemistry ,Mechanism (sociology) - Abstract
Intermediate formation of radical pair has been proposed in the dimerization of 1-hydro-4-phenylpyridinyl radical from the observation of two-step decay of the radical, in which the fast step is represented by second-order and the slow step is first-order. The activation parameters were determined.
- Published
- 1982
46. JAPAN SOCIETY OF HISTOCHEMISTRY AND CYTOCHEMISTRY, THIRTETH ANNIVERSARY LECTURES
- Author
-
Kenjiro Yasuda, Akira Mizutani, Kazuo Ogawa, and Yutaka Sano
- Subjects
Histology ,Physiology ,Chemistry ,Cytochemistry ,Cell Biology ,Anatomy ,Biochemistry ,Pathology and Forensic Medicine - Published
- 1989
47. Distribution of LH-RH nerve endings in the median eminence of proestrus female rats: fluorescence and peroxidase anti-peroxidase(PAP) immunohistochemistry
- Author
-
Kenichi Imagawa, S. Sin, Yasuhiko Ibata, Yutaka Sano, K. Watanabe, Hiroshi Kimura, and Etsuro Hashimura
- Subjects
Hypothalamo-Hypophyseal System ,Fluorescent Antibody Technique ,Gonadotropin-Releasing Hormone ,Immunoenzyme Techniques ,Infundibulum ,Endocrinology ,Pregnancy ,medicine ,Animals ,Nerve Endings ,biology ,Median Eminence ,General Engineering ,Anatomy ,Sulcus ,Rats ,medicine.anatomical_structure ,Monoamine neurotransmitter ,Hypothalamus ,Median eminence ,biology.protein ,Immunohistochemistry ,Female ,Proestrus ,Free nerve ending ,Peroxidase - Abstract
The morphological distribution of the nerve terminals containing LH-RH in the hypothalamus especially in the median eminence of the proestrus female rat was demonstrated by immunohistochemistry, using FITC and peroxidase antibody. The terminals containing LH-RH were classified into four groups on the topographic relationship. LH-RH nerve processes terminated mainly in the infurdibular radix within an elliptical zone surrounding the bases of the infundibular recessus. The heaviest concentration of LH-RH terminals immunohistochemically demonstrated lay on each side of the region extending from the dorsal part of tuberoinfundibular sulcus to the lateral part of the external layer of the superior labium of the infundibulum. We were unable to detect any neuronal soma with the immunoreactivity to LH-RH in the hypothalamic gray matter. The distributional patterns of LH-RH, GH-RIH and monoamine in the median eminence as well as their relationships were briefly discussed.
- Published
- 1978
48. Studies on the Neurosecretory Cells in the Silkworm, Bombyx mori (Lepidoptera : Bombycidae) : III. Ultrastructural Differences of Neurosecretory Cells in Brains of Male and Female Pupae
- Author
-
Yutaka Sano and Masaji Nishimura
- Subjects
Pupa ,Lepidoptera genitalia ,Bombycidae ,biology ,Bombyx mori ,Insect Science ,Ultrastructure ,biology.organism_classification ,Molecular biology - Published
- 1981
49. In memoriam Wolfgang BARGMANN (1906-1978)
- Author
-
Yutaka Sano
- Subjects
Histology ,Philosophy ,Anatomy - Published
- 1979
50. GENERAL SESSION
- Author
-
Akio TANAKA, Kimiya SUGIMURA, Akira MIZUTANI, Masayuki Baba, Goyo Koya, Tsugio AMEMIYA, Hidehiko YOSHIDA, Masako YOSHIDA, Fumie Sasaki, Sachiko KAKUTA, Kouhei MORIMOTO, Yasukazu NAGATO, Toshio SUZUKI, Yasunari TSUCHIHASHI, Tadahisa KITAMURA, Setsuya FUJITA, Masaki Fujimura, S.T. Chen, Takayoshi Tobe, Haruaki Yajima, I. NAGATSU, S. INAGAKI, Y. KONDO, T. KATO, T. NAGATSU, Koji KAMI, Tadao MITSUI, Akira KAWAOI, Tadao OKANO, Toshio SHIKATA, Kazuyoshi DOBASHI, Shigeo TAKAGI, Kenji WATANABE, Seiichi KUBO, Yasuhiko IBATA, Yutaka SANO, R.Y. Osamura, E. Nakahashi, K. Watanabe, Tetsuro ONO, Yasuhiro SAKAI, Noboru YAMAMOTO, Kenjiro YASUDA, Naoyuki MARUO, Takuji ISEMURA, Masaru FUKUDA, Yoshiaki NOJYO, Kiminao MIZUKAWA, Tadao MATSUURA, Keizo YAMAMOTO, Akira TAKAKUSU, Masakazu YAMADA, Hiroshi MATSUBARA, Masaoki YAMADA, Fusayoshi MURATA, Keizo YOSHIDA, Yuriko MOMOSE, Shinichi OHNO, Tetsuji NAGATA, Akiko OKADA, Kazuto NOKUBI, Morio KATO, Vinci Mizuhira, Michiko Shiihashi, Masao Yokoyama, Fumiaki Nishiyama, Hiroshi Hirano, Norio Kawai, Hajime SUGIURA, Hideki WATANABE, Kazuyo USHIKI, Takuro SUZUKI, Tamio NISHIMURA, Takuji OHKURA, Hirohiko IWATSUKI, Yoshiki SHIBA, Yoshinobu KANNO, Tsutomu KATSUYAMA, Tsuyoshi NASU, Masanori TSUKAHARA, Fujio NUMANO, Hidenori MAEZAWA, Genzoh ISOMURA, Takehiko HIDA, Nobuo SHIMIZU, Hisanobu KAIYA, Tsuyoshi IWATA, Masuyuki NAMBA, Akira KASHIBA, Hisashi HASHIMOTO, Hiroshi KIMURA, Toshihiro MAEDA, Shigetoyo AMANO, Kikuko IMAMOTO, Haruo KINOSHITA, K. YAMAMOTO, T. SAKUMOTO, K. SATOH, Y. KIMOTO, Y. TAKAHASHI, M. TOHYAMA, N. SHIMIZU, Michiyasu AWAI, Mikio NARASAKI, Yasuhiro YAMANOI, Satimaru SENO, Yasuo KISHINO, Satoru MORIGUCHI, Tetsuo ISHII, Katsuko KATAOKA, Keisuke SHIMIZU, Junzo OCHI, Hiroki KAJIHARA, Soichi IIJIMA, Chiharu SUEMATSU, Tetsuzo KUMAMOTO, Mitsunori SAITO, Masanori TOMONAGA, Yoko UCHIDA, Kazushi FUJIMOTO, Takashi MAKITA, Hiromi SAKURADA, Shigeto KANDA, Nagayasu OTSUKA, T. Daimon, K. Uchida, V. Mizuhira, Tetsuo HAMADA, Takeshi Tsuru, Kazuko SATO, Teruo IWAMASA, Tadao TAKEUCHI, Harumichi IMAI, Kunio NAKAI, Tohru ITAKURA, Kei-ichi HIRAI, Mitsuaki YAMAUCHI, Hanspeter WITSCHI, Michel G. COTE, Reiko Nishi, Shinji Sawada, Osamu Midorikawa, S. NOZAWA, S. IZUMI, H. OHTA, S. HAYASHI, S. NAGAI, S. KURIHARA, N. KOMATSU, K. WATANABE, Shinichi Izumi, Nobuhiko Komatsu, Atsushi Ozawa, Nobuhiko Onishi, Etsuko Nakahashi, Keiichi Watanabe, Akio TOMINAGA, Yoichiro TAKASHIMA, Hidetoshi FUKUNAGA, Mitsuhiro OSAME, Masaru KAWABUCHI, Akihiro IGATA, Ken Fujimori, Masa-oki Yamada, Keizo Yamamoto, Shohei YAMASHINA, Kazuhiro KAWAI, Takeo KUSUMOTO, Hisatoshi HARADA, Tadami KUMAZAWA, Sotokichi MORII, I. KAMEI, Jiro Tateiwa, Junko Toki, Kotaro Osawa, Kazuo NAKANISHI, S. OHNO, F. MURATA, K. YOSHIDA, S. FURUTA, T. NAGATA, R. SENDA, Y. AKAGI, Y. SANO, F. Sasaki, Tutomu KATSUYAMA, Tetsuo Hamada, Teruo Iwamasa, Tadao Takeuchi, Noriyuki Komatsu, Shinichi Yoshimura, M. KIMURA, K. NOKUBI, M. KATO, M. KISO, S. OTSUKA, Shigeru TAKIGAMI, Emiyo MACHINAKA, Katsuhiko YOSHITOKI, Votaro Osnwa, Ryuei Haeda, Isao Iirime, Ryokei Ogawa, and Hasuta Hori
- Subjects
Histology ,Physiology ,Cell Biology ,Biochemistry ,Pathology and Forensic Medicine - Published
- 1978
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