24 results on '"S. Oikawa"'
Search Results
2. ChemInform Abstract: Epitaxial Growth Mechanism of Diamond Crystal in CH4-H2 Plasma
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M. Nakajima, M. Tsuda, and S. Oikawa
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Chemical physics ,Chemistry ,General Medicine ,Plasma ,Epitaxy ,Mechanism (sociology) ,Diamond crystal - Published
- 1987
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3. ChemInform Abstract: AB INITIO THEORETICAL RESEARCH ON PERFLUOROCHEMICALS AS OXYGEN CARRIERS
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S. Oikawa, Minoru Tsuda, and K. Nagayama
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Chemistry ,Computational chemistry ,Ab initio ,chemistry.chemical_element ,Theoretical research ,General Medicine ,Oxygen - Published
- 1984
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4. ChemInform Abstract: PHOTOLYSIS OF ORGANIC AZIDES. III. FORMATION OF BENZ(CD)INDAZOLE BY LOW-TEMPERATURE PHOTOLYSIS OF 1,8-DIAZIDONAPHTHALENE IN A RIGID MATRIX
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Koichi Honda, Akira Yabe, Minoru Tsuda, and S. Oikawa
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Indazole ,chemistry.chemical_compound ,Matrix (mathematics) ,Chemistry ,Photodissociation ,General Medicine ,Photochemistry ,Combinatorial chemistry - Published
- 1977
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5. ChemInform Abstract: PREFULVENE AS A STABLE INTERMEDIATE AT THE POTENTIAL ENERGY SURFACE MINIMUM OF THE BENZENE ⇌ BENZVALENE ISOMERIZATION PROCESS
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S. OIKAWA, M. TSUDA, Y. OKAMURA, and T. URABE
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General Medicine - Published
- 1985
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6. Characteristics of drawing deficits in people with aphasia: Differences between symbolic and realistic drawn objects.
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Komori N, Hashimoto R, Jinushi C, Uechi M, Oikawa S, and Hirano E
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- Humans, Male, Female, Middle Aged, Aged, Semantics, Adult, Pattern Recognition, Visual physiology, Symbolism, Aphasia psychology
- Abstract
Background: Pictures drawn by people with aphasia (PWA) are often more challenging to understand than those drawn by healthy people. There are two types of objects: those that tend to be drawn symbolically (symbolically drawn objects-SOs) and those that are likely to be drawn realistically (realistically drawn objects-ROs)., Aims: To compare the identification rate and number of misunderstanding types between SOs and ROs drawn by PWA and healthy controls (HCs). To reveal trends in the misunderstandings of drawings by PWA, and to identify the language or cognitive abilities related to the identification rate of pictures drawn by PWA., Methods & Procedures: We designed a drawing task involving SOs and ROs. A total of 18 PWA and 30 HCs completed the task, and respondents identified the drawings. The identification rate and number of misunderstandings were analysed with two-way analysis of variance (ANOVA) including group (PWA and HCs) and object type (SOs and ROs). The misunderstandings were divided into four categories varying in semantic and morphological similarity; these ratios were examined with a chi-square test. The relationships of language and cognitive abilities with the identification rate were investigated with multiple regression analyses., Outcomes & Results: There was a significant effect of the interaction between group and object type on the identification rate (F(1.1387) = 3.90, Mean Squared Error (MSE) = 4139.67, p = 0.04): the identification rates for ROs were lower in the PWA than in the HCs. For the number of misunderstanding types, an interaction was observed between group and object type (F(1.56) = 8.26, MSE = 26.93, p < 0.01): the number of misunderstanding types for ROs in the PWA was greater than that in the HCs. The misunderstanding patterns differed between ROs and SOs (χ
2 (3) = 694.30, p < 0.001, V = 0.37). ROs were semantically related, whereas SOs were morphologically related. The identification rates of ROs and SOs were correlated only with Kanji writing scores (ROs: β = 3.66, p = 0.01; SOs: β = 6.57, p < 0.01)., Conclusions & Implications: In drawings by the PWA, SOs had a higher identification rate, while ROs had a lower identification rate and a greater variety of misunderstandings. SOs may increase drawing motivation. Interventions to improve the identifiability of SOs and ROs should reflect each character. Identification rates were correlated only with Kanji writing scores. The PWA, whose native language was Japanese and had preserved Kanji writing abilities, and their communication abilities may be increased through drawing., What This Paper Adds: What is already known on the subject PWA often have impaired drawing abilities and draw pictures that third parties misinterpret. Some objects tend to be drawn symbolically, and some are drawn realistically. However, it is not clear whether there is a difference between these types of drawings depicted by PWA in identifiability and the tendency to be misunderstood by ordinary people. In addition, the relationships between language or cognitive abilities and the identification rate of drawn pictures are not clear. What this paper adds to the existing knowledge The identification rate differed between SOs and ROs. In drawings by PWA, SOs had a higher identification rate, while ROs had a lower identification rate and the greatest variety of misunderstandings. Approximately half of the misunderstandings were related to the target object. SOs tended to be confused with morphologically related objects, while ROs tended to be confused with semantically related objects. Identification rates were correlated only with Kanji writing scores. What are the potential or actual clinical implications of this work? To motivate PWA's drawing, it is suitable to begin with SOs. Examining drawing ability from the perspective of SOs and ROs increases the chance of identifying drawing ability. PWA whose native language is Japanese and have preserved Kanji writing abilities may be able to increase their communication abilities through drawing., (© 2023 Royal College of Speech and Language Therapists.)- Published
- 2024
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7. Effects of starch content of calf starter on rumen properties and blood concentrations of metabolites and hormones in dairy calves under a high plane of milk feeding.
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Satoh H, Fukumori R, Kumano R, Kamata M, Shimada K, Izumi K, and Oikawa S
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- Animals, Cattle, Male, Female, Insulin-Like Growth Factor I metabolism, Propionates metabolism, Rumen metabolism, Milk metabolism, Body Weight, Animal Feed analysis, Weaning, Hormones metabolism, Diet veterinary, Starch metabolism
- Abstract
The objective of this study was to investigate the effects of calf starters with different starch content on rumen and blood properties in calves fed under a high plane of nutrition program. Twenty-seven Holstein calves (14 female, 13 male) were assigned to one of three starter treatment groups in a randomized block design: high-starch (41.8%) (n = 9), H; medium-starch (31.9%) (n = 9), M; low-starch (22.0%) (n = 9), L. Milk replacer on powder basis was fed up to 1.2 kg/day as fed, gradually reduced from 6 weeks of age; calves were weaned at 8 weeks of age. Each starter (up to 3.5 kg/day as fed) and chopped hay were provided ad libitum from 5 days of age. Blood was collected from 4 to 13 weeks of age. Rumen fluid was collected at 6, 8, 10, and 13 weeks of age. Serum urea nitrogen concentration after weaning was the lowest in H. Plasma IGF-1 concentrations were higher in H than in L. Ruminal pH was not different, but the molar proportion of ruminal propionate was higher in H than in L throughout the study period. In summary, a high-starch starter may increase propionate production and microbial protein synthesis in the rumen, inducing higher plasma IGF-1 concentrations., (© 2024 Japanese Society of Animal Science.)
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- 2024
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8. Effects of starch content of calf starter on feed intake, growth performance, and fecal properties in dairy calves under a high plane of milk replacer feeding.
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Satoh H, Fukumori R, Osada T, Shimada K, Oikawa S, and Izumi K
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- Animals, Cattle, Animal Feed analysis, Body Weight, Eating, Milk, Weaning, Diet veterinary, Starch
- Abstract
The objective of this study was to investigate the effects of different starch contents in calf starter on the growth, feed intake, and fecal characteristics in dairy calves fed under a high plane of nutrition. Twenty-seven Holstein calves were assigned equally to one of three calf starter treatment groups in a randomized block design: high (H) starch (41.8%); medium (M) starch (31.9%); and low (L) starch (22.0%). Milk replacer was fed up to 1.2 kg/day as fed, gradually reduced from 6 weeks of age; calves were weaned at 8 weeks of age. Each starter (up to 3.5 kg/day as fed) and chopped hay were provided ad libitum from 5 days of age. Fecal samples, along with body measurements, were collected from 4 to 13 weeks of age. The average daily gain after weaning was greater in the H group than in the L group. The average starter intake for 3 days before weaning was not different among treatments but was greater after weaning in the H group than in the L group. Starter starch content did not affect the number of days with diarrhea or fecal starch concentration. The high-starch starter had no adverse effects during the weaning transition., (© 2023 Japanese Society of Animal Science.)
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- 2023
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9. Recovery of respiratory muscle strength, physical function, and dyspnoea after lobectomy in lung cancer patients undergoing pulmonary rehabilitation: A retrospective study.
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Ichikawa T, Yokoba M, Horimizu Y, Yamaguchi S, Kawakami A, Oikawa S, Takeichi H, Katagiri M, and Toyokura M
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- Humans, Retrospective Studies, Muscle Strength, Respiratory Muscles, Dyspnea etiology, Lung Neoplasms surgery, Carcinoma, Non-Small-Cell Lung surgery
- Abstract
Objective: To characterise changes in respiratory muscle strength, physical function, and dyspnoea in patients who underwent pre- and post-operative exercise intervention following lobectomy for non-small-cell lung cancer (NSCLC)., Methods: This retrospective study included NSCLC patients who underwent lobectomy via video-assisted thoracoscopic surgery (VATS) or posterolateral thoracotomy (PLT) and pre- and post-operative exercise intervention consisting of breathing, flexibility, resistance, aerobic exercises, coughing/huffing techniques, and early mobilisation. Maximum mouth inspiratory (Pimax) and expiratory pressures (Pemax), 6-min walk distance (6MWD), quadriceps force (QF), and modified Medical Research Council (mMRC) dyspnoea scale were evaluated preoperatively, at hospital discharge, and post-lobectomy 1 and 3 months., Results: Data from 41 patients were analysed. At hospital discharge, the Pimax, Pemax, 6MWD, and mMRC dyspnoea scores were lower than pre-operatively; QF remained unchanged; Pimax and 6MWD recovered to pre-operative values at post-lobectomy 1 month; and Pemax and mMRC dyspnoea scores recovered at 3 months. During sub-analysis, Pimax and mMRC dyspnoea scores in the VATS (n = 24) and PLT groups (n = 17) recovered to pre-operative values at post-lobectomy 1 and 3 months., Conclusion: After lobectomy, respiratory muscle strength, physical function, and dyspnoea in patients who underwent exercise intervention returned to pre-operative values at post-lobectomy 3 months., (© 2022 John Wiley & Sons Ltd.)
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- 2022
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10. Sodium butyrate administration modulates the ruminal villus height, inflammation-related gene expression, and plasma hormones concentration in dry cows fed a high-fiber diet.
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Fukumori R, Doi K, Mochizuki T, Oikawa S, Gondaira S, Iwasaki T, and Izumi K
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- Cattle, Animals, Female, Butyric Acid pharmacology, Gene Expression, Hormones, Diet veterinary
- Abstract
The objectives of this study were to evaluate the effects of sodium butyrate on the ruminal villus morphology, mRNA expression associated with nutrient metabolism and inflammation in the ruminal epithelium, and plasma concentrations of metabolites and hormones in non-lactating cows fed a high-fiber diet. Four Holstein cows with a rumen cannula were assigned to two treatments in a crossover design. The treatments were ruminal administration of sodium butyrate premix or control premix before feeding to cows fed the same total mixed ration mainly composed of glass silage once a day. Sodium butyrate was provided at a butyrate dose of 0.04% per kg body weight. The control premix was made by replacing sodium-butyrate with wheat bran. The plasma β-hydroxybutyrate concentration increased 3 to 6 h after the butyrate premix administration but returned to a concentration similar to that of the control before feeding. After continuous administration, increases in the ruminal villus height and plasma concentration of glucagon-like peptide-2, and lower gene expression of TNF-α, IL-1β, and TLR-2 in the rumen epithelium were observed in cows supplied with the butyrate premix. These results showed that sodium butyrate affects rumen epithelial morphology and plasma concentrations of hormones even under a low fermentable diet., (© 2022 Japanese Society of Animal Science.)
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- 2022
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11. The effect of sodium butyrate supplementation on ruminal and fecal pH and serum lipopolysaccharide-binding protein after ruminal acidosis challenge in nonlactating cows.
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Fukumori R, Ikeno R, Izumi K, Doi K, Otsuka M, Suzuki K, and Oikawa S
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- Acute-Phase Proteins, Animals, Body Weight, Butyric Acid metabolism, Carrier Proteins, Cattle, Diet veterinary, Dietary Supplements, Endotoxins metabolism, Female, Fermentation, Hydrogen-Ion Concentration, Lactation, Membrane Glycoproteins, Rumen metabolism, Sodium metabolism, Starch metabolism, Acidosis veterinary, Cattle Diseases metabolism
- Abstract
The objective of this study was to evaluate effects of sodium-butyrate supplementation on gastrointestinal function and the inflammatory response to ruminal acidosis (RA) challenge in cows. Four nonlactating cows with a rumen cannula were assigned to two treatments in a crossover design. Treatments were ruminal administration of sodium-butyrate (BUT) or control (CON). Sodium-butyrate was provided as Gustor BP70 and administered at a butyrate dose of 0.04% per kg body weight. The CON premix was made by replacing sodium-butyrate with wheat bran. Experimental periods were 28 days long with 21-day washout period separating the treatments. On Day 25 of each period, corn starch was ruminally administered at 0.7% per kg body weight as RA challenge. After RA challenge, ruminal pH was lower, and endotoxin concentration was higher for cows provided with BUT than those with CON, but the increase in fecal starch and the decrease in fecal pH were attenuated by BUT. The effect of butyrate supplementation on serum lipopolysaccharide-binding protein after RA challenge was not found. From these findings, butyrate supplementation mitigated rectal acidosis by reducing the flux of fermentable carbohydrate into the large intestine. An anti-inflammatory effect of butyrate was not observed, possibly due to lower pH and higher endotoxin concentration in the rumen., (© 2021 Japanese Society of Animal Science.)
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- 2021
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12. Three-dimensional computed tomography confirmed that the meniscal root attachments and meniscofemoral ligaments are morphologically consistent.
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Tanifuji K, Tajima G, Yan J, Maruyama M, Sugawara A, Oikawa S, Oikawa R, Kikuchi S, and Doita M
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- Aged, Aged, 80 and over, Bone and Bones, Cadaver, Female, Humans, Imaging, Three-Dimensional, Knee Joint diagnostic imaging, Ligaments, Articular diagnostic imaging, Male, Middle Aged, Tibia anatomy & histology, Tomography, X-Ray Computed, Knee Joint anatomy & histology, Ligaments, Articular anatomy & histology, Menisci, Tibial anatomy & histology
- Abstract
Purpose: To clarify the characteristic features of the meniscal root attachments, meniscofemoral ligaments (MFLs), and related osseous landmarks on three-dimensional images using computed tomography., Methods: Twenty-eight non-paired, formalin-fixed human cadaveric knees were evaluated in this study. The meniscal root attachments were identified and marked. Three-dimensional images were obtained after applying a contrast agent to the entire meniscal surfaces and MFLs, then the morphology of the meniscal root attachments and MFLs, and their positional relationships with osseous landmarks, were analyzed., Results: Parsons' knob divided the medial meniscal anterior root attachment and lateral meniscal anterior root attachment on the anterior portion of the tibial plateau. The medial meniscal posterior root attachment was near the medial intercondylar tubercle. The lateral meniscal posterior root attachment (LMPRA) was closer to the lateral intercondylar tubercle. Both root attachments were near the posterior intercondylar fossa. The positional relationships between the meniscal root attachments and related osseous landmarks were consistent in all specimens. The MFLs originated from the lateral meniscus posterior horn, and the anterior MFL was closer to the LMPRA than the posterior MFL. The posterior MFL originated at approximately the midpoint between the LMPRA and the most posterior margin of the lateral meniscus., Conclusion: This study showed that the relationships between the characteristic features of the meniscal root attachments, MFLs, and related osseous landmarks were consistent. The clinical relevance of this study is that it improved understanding of the anatomy of the meniscal root attachments and MFLs.
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- 2020
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13. Taurine Attenuates Carcinogenicity in Ulcerative Colitis-Colorectal Cancer Mouse Model.
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Wang G, Ma N, He F, Kawanishi S, Kobayashi H, Oikawa S, and Murata M
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- Animals, Apoptosis drug effects, Azoxymethane, Body Weight drug effects, Carcinogenesis drug effects, Cell Proliferation drug effects, Colitis, Ulcerative pathology, Colon drug effects, Colon pathology, Colorectal Neoplasms pathology, Dextran Sulfate, Disease Models, Animal, Feces, Ki-67 Antigen metabolism, Male, Mice, Inbred C57BL, PTEN Phosphohydrolase metabolism, Tumor Burden drug effects, Carcinogenesis pathology, Colitis, Ulcerative complications, Colorectal Neoplasms complications, Taurine pharmacology
- Abstract
Taurine (2-aminoethane-sulfonic acid) is a type of amino acids and has numerous physiological and therapeutic functions, including anti-inflammation. However, there are few studies on the anticancer action of taurine. Our previous studies have demonstrated that taurine exhibits an apoptosis-inducing effect on human nasopharyngeal carcinoma cells in vitro . In this study, we have investigated whether taurine has an anticancer effect, using azoxymethane (AOM)/sulfate sodium (DSS)- induced mouse model for colon carcinogenesis. All mice, except those in control group, received a single intraperitoneal injection of AOM and DSS in the drinking water for 7 days twice, with 1-week interval. After the first DSS treatment, mice were given distilled water (model group) or taurine in the drinking water (taurine group) ad libitum. No tumor was observed in the control group. Taurine significantly suppressed AOM+DSS-induced tumor formation. Histopathological examination revealed AOM/DSS treatment induced colon cancer in all mice (8/8, 100%), and taurine significantly inhibited the progression of colon cancer (4/9, 44.4%). Taurine significantly attenuated cell proliferation in cancer tissues detected by Ki-67 staining. Taurine significantly increased the levels of an apoptosis marker cleaved caspase-9 and tumor suppressor protein PTEN. This is the first study that demonstrated that taurine significantly reduced carcinogenicity in vivo using AOM/DSS-induced colon cancer mouse model., Competing Interests: The authors declare that there is no conflict of interest regarding the publication of this paper., (Copyright © 2020 Guifeng Wang et al.)
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- 2020
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14. Characteristic features of the insertions of the distal tibiofibular ligaments on three-dimensional computed tomography- cadaveric study.
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Kikuchi S, Tajima G, Sugawara A, Yan J, Maruyama M, Oikawa S, Saigo T, Oikawa R, and Doita M
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Purpose: The purpose of this study was to clarify the insertion sites of the anterior inferior tibiofibular ligament (AITFL) and posterior inferior tibiofibular ligament (PITFL) and related osseous landmarks on three-dimensional computed tomography images., Methods: Twenty-nine non-paired, formalin-fixed human cadaveric ankles were evaluated. The tibial and fibular insertion sites of the AITFL and PITFL were identified. The morphology and location of the insertion sites and their positional relationships with osseous structures were analyzed on three-dimensional computed tomography images., Results: The AITFL had a trapezoidal shape, with fibers that ran obliquely lateral from a wider insertion at the lateral distal tibia to the medial distal fibula. The PITFL had a similar shape to the AITFL; however, it ran more horizontally, with fibers running in the same direction. In the tibia, the anterior capsular ridge and the Chaput's and Volkmann's tubercles were useful osseous landmarks for the insertion sites. In the fibula, the centers of the insertion sites of the AITFL and PITFL were located on the edges of the distal anterior and posterior fibula, which were useful osseous landmarks. The mean distances between the center points of the tibial and fibular insertion sites of the AITFL and PITFL were 10.1 ± 2.4 mm and 11.7 ± 2.6 mm, respectively., Conclusions: The relationships between the characteristic features of the distal tibia and fibula and the insertions of the AITFL and PITFL were consistent. The present findings improve the understanding of the anatomy of the insertions of the distal tibiofibular syndesmotic joint.
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- 2020
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15. Overexpression of CD44 Variant 9: A Novel Cancer Stem Cell Marker in Human Cholangiocarcinoma in Relation to Inflammation.
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Suwannakul N, Ma N, Thanan R, Pinlaor S, Ungarreevittaya P, Midorikawa K, Hiraku Y, Oikawa S, Kawanishi S, and Murata M
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- Adult, Calcium-Binding Proteins metabolism, Cholangiocarcinoma immunology, Cyclooxygenase 2 metabolism, Female, Humans, Hyaluronan Receptors genetics, Inflammation immunology, Liver metabolism, Liver pathology, Male, Neoplasm Proteins metabolism, Neoplastic Stem Cells immunology, Cholangiocarcinoma metabolism, Hyaluronan Receptors metabolism, Inflammation metabolism, Neoplastic Stem Cells metabolism
- Abstract
Various CD44 isoforms are expressed in several cancer stem cells during tumor progression and metastasis. In particular, CD44 variant 9 (CD44v9) is highly expressed in chronic inflammation-induced cancer. We investigated the expression of CD44v9 and assessed whether CD44v9 is a selective biomarker of human cholangiocarcinoma (CCA). The expression profile of CD44v9 was evaluated in human liver fluke Opisthorchis viverrini -related CCA (OV-CCA) tissues, human CCA (independent of OV infection, non-OV-CCA) tissues, and normal liver tissues. CD44v9 overexpression was detected by immunohistochemistry (IHC) in CCA tissues. There was a higher level of CD44v9 expression and IHC score in OV-CCA tissues than in non-OV-CCA tissues, and there was no CD44v9 staining in the bile duct cells of normal liver tissues. In addition, we observed significantly higher expression of inflammation-related markers, such as S100P and COX-2, in OV-CCA tissues compared to that in non-OV and normal liver tissues. Thus, these findings suggest that CD44v9 may be a novel candidate CCA stem cell marker and may be related to inflammation-associated cancer development.
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- 2018
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16. Inconsistent intraspecific pattern in leaf life span along nitrogen-supply gradient.
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Oikawa S, Suno K, and Osada N
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- Asteraceae metabolism, Asteraceae physiology, Ecosystem, Models, Biological, Species Specificity, Xanthium metabolism, Xanthium physiology, Carbon metabolism, Nitrogen metabolism, Plant Leaves metabolism, Soil chemistry
- Abstract
Premise of the Study: Leaf life span (LLS) has long been hypothesized to plastically increase with decreasing nitrogen (N) supply from soil to maximize N retention, carbon assimilation, and fitness; however, accumulating evidence shows no consistent trend. The apparent inconsistencies are explained by a recent model that assumes LLS has a hump-shaped quadratic response to the N-supply gradient. The available evidence mostly originates from comparisons of LLS at only two levels of N availability, and the hypothesis remains unanswered., Methods: We investigated LLS of two asteraceous forbs ( Adenocaulon himalaicum and Xanthium canadense ) experimentally grown at eight levels of N supply, which covered a range of N supply in their natural habitats. We additionally conducted a literature search to retrieve studies reporting LLS response along an N-supply gradient., Key Results: The LLS of neither species showed a hump-shaped response along the N-supply gradient. Past studies examining the LLS of an aquatic forb and terrestrial shrubs and trees along the N-supply gradient (more than four levels of N supply) also refuted the hypothesis., Conclusions: The LLS of a single species exhibited neither an increase nor a hump-shaped response to decreased N supply in a variety of life forms. Comparisons at only a few N levels are misleading with regard to LLS response to N supply., (© 2017 Botanical Society of America.)
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- 2017
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17. Inflammation-Related DNA Damage and Cancer Stem Cell Markers in Nasopharyngeal Carcinoma.
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Wang S, Ma N, Zhao W, Midorikawa K, Kawanishi S, Hiraku Y, Oikawa S, Zhang Z, Huang G, and Murata M
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- Aldehyde Dehydrogenase metabolism, Aldehyde Dehydrogenase 1 Family, Blotting, Western, Carcinoma, Cell Line, Tumor, Flow Cytometry, Humans, Hyaluronan Receptors metabolism, Nasopharyngeal Carcinoma, Retinal Dehydrogenase, Biomarkers, Tumor metabolism, DNA Damage genetics, Inflammation physiopathology, Nasopharyngeal Neoplasms genetics, Neoplastic Stem Cells metabolism
- Abstract
Nitrative and oxidative DNA damage plays an important role in inflammation-related carcinogenesis. To investigate the involvement of stem cells in Epstein-Barr virus infection-related nasopharyngeal carcinoma (NPC), we used double immunofluorescence staining to examine several cancer stem/progenitor cell markers (CD44v6, CD24, and ALDH1A1) in NPC tissues and NPC cell lines. We also measured 8-nitroguanine formation as an indicator of inflammation-related DNA lesions. The staining intensity of 8-nitroguanine was significantly higher in cancer cells and inflammatory cells in the stroma of NPC tissues than in chronic nasopharyngitis tissues. Expression levels of CD44v6 and ALDH1A1 were significantly increased in cancer cells of primary NPC specimens in comparison to chronic nasopharyngitis tissues. Similarly, more intense staining of CD44v6 and ALDH1A1 was detected in an NPC cell line than in an immortalized nasopharyngeal epithelial cell line. In the case of CD24 staining, there was no significant difference between NPC and chronic nasopharyngitis tissues. 8-Nitroguanine was detected in both CD44v6- and ALDH1A1-positive stem cells in NPC tissues. In conclusion, CD44v6 and ALDH1A1 are candidate stem cell markers for NPC, and the increased formation of DNA lesions by inflammation may result in the mutation of stem cells, leading to tumor development in NPC.
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- 2016
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18. Relationships of alpha-SMA-positive fibroblasts and SDF-1-positive tumor cells with neoangiogenesis in nasopharyngeal carcinoma.
- Author
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Wang S, Ma N, Kawanishi S, Hiraku Y, Oikawa S, Xie Y, Zhang Z, Huang G, and Murata M
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- Adult, China epidemiology, Female, Fibroblasts pathology, Humans, Male, Middle Aged, Nasopharyngeal Neoplasms epidemiology, Nasopharyngeal Neoplasms pathology, Neovascularization, Pathologic epidemiology, Neovascularization, Pathologic pathology, Actins metabolism, Chemokine CXCL12 metabolism, Fibroblasts metabolism, Nasopharyngeal Neoplasms metabolism, Neoplasm Proteins metabolism, Neovascularization, Pathologic metabolism
- Abstract
Nasopharyngeal carcinoma (NPC) is one of the most prevalent malignant tumors with poor prognosis in Southern China and Southeast Asia. Angiogenesis-related molecules can be promising therapeutic targets in NPC. To investigate the relationships of cancer-associated fibroblasts (CAFs) and chemokine-related molecules with neoangiogenesis, we compared immunohistochemical analyses of alpha-smooth-muscle actin (α-SMA), stroma-derived factor-1 (SDF-1), and its receptor CXCR4 in primary NPC specimens and chronic nasopharyngitis tissues. In addition, we examined the expression of vascular endothelial growth factor (VEGF-A), and CD133- and VEGF- receptor-2 (VEGFR-2) double positive cells, as endothelial progenitor cells (EPCs). We also assessed CD34-positive microvessels. Significantly higher expression of α -SMA was observed in fibroblasts in NPC stroma. The immunoreactive intensities of SDF-1 and CXCR4 were significantly higher in NPC cells. CXCR4-positive cells and CD133/VEGFR-2- double positive cells were observed in the stroma surrounding cancer nests, and VEGF was detected in both cancer and stromal cells. Microvessel density was significantly higher in the stroma of NPC tissues compared to chronic nasopharyngitis tissues. Our data suggest that CAFs and NPC tumor cells may enhance neoangiogenesis in a VEGF- and SDF-1-dependent manner by recruiting EPCs from the bone marrow into tumor stroma.
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- 2014
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19. The multicomponent anthropometric model for assessing body composition in a male pediatric population: a simultaneous prediction of fat mass, bone mineral content, and lean soft tissue.
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Machado D, Oikawa S, and Barbanti V
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- Absorptiometry, Photon, Adipose Tissue, Adolescent, Child, Cross-Sectional Studies, Humans, Male, Reproducibility of Results, Skinfold Thickness, Anthropometry, Body Composition, Bone Density, Models, Biological
- Abstract
The aim of this study was to propose and cross-validate an anthropometric model for the simultaneous estimation of fat mass (FM), bone mineral content (BMC), and lean soft tissue (LST) using DXA as the reference method. A total of 408 boys (8-18 years) were included in this sample. Whole-body FM, BMC, and LST were measured by DXA and considered as dependent variables. Independent variables included thirty-two anthropometrics measurements and maturity offset determined by the Mirwald equation. From a multivariate regression model ((n)Y(m) = (n)x(r + 1)(r + 1)β(m) + (n)ε(m)), a matrix analysis was performed resulting in a multicomponent anthropometric model. The cross-validation was executed through the sum of squares of residuals (PRESS) method. Five anthropometric variables predicted simultaneously FM, BMC, and LST. Cross-validation parameters indicated that the new model is accurate with high R(PRESS)(2) values ranging from 0.94 to 0.98 and standard error of estimate ranging from 0.01 to 0.09. The newly proposed model represents an alternative to accurately assess the body composition in male pediatric ages.
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- 2013
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20. Nuclear localization of COX-2 in relation to the expression of stemness markers in urinary bladder cancer.
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Thanan R, Murata M, Ma N, Hammam O, Wishahi M, El Leithy T, Hiraku Y, Oikawa S, and Kawanishi S
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- Animals, Cell Differentiation, Cell Proliferation, Humans, Hyaluronan Receptors biosynthesis, Immunohistochemistry methods, Inflammation, Microscopy, Fluorescence methods, Octamer Transcription Factor-3 metabolism, Schistosoma haematobium metabolism, Schistosomiasis complications, Stem Cells cytology, Up-Regulation, Urinary Bladder Neoplasms complications, Cell Nucleus enzymology, Cyclooxygenase 2 biosynthesis, Gene Expression Regulation, Enzymologic, Gene Expression Regulation, Neoplastic, Urinary Bladder Neoplasms enzymology
- Abstract
Inflammation may activate stem cells via prostaglandin E2 (PGE2) production mediated by cyclooxygenase-2 (COX-2) expression. We performed an immunohistochemical analysis of the expression of stemness markers (Oct3/4 and CD44v6) and COX-2 in urinary bladder tissues obtained from cystitis and cancer patients with and without Schistosoma haematobium infections. Immunoreactivity to Oct3/4 was significantly higher in S. haematobium-associated cystitis and cancer tissues than in normal tissues. CD44v6 expression was significantly higher in bladder cancer without S. haematobium than in normal tissues. COX-2 was located in the cytoplasmic membrane, cytoplasm, and nucleus of the cancer cells. Interestingly, the nuclear localization of COX-2, which was reported to function as a transcription factor, was significantly associated with the upregulation of Oct3/4 and CD44v6 in bladder cancer tissues with and without S. haematobium infection, respectively. COX-2 activation may be involved in inflammation-mediated stem cell proliferation/differentiation in urinary bladder carcinogenesis.
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- 2012
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21. Etiology of hypercholesterolemia in patients with anorexia nervosa.
- Author
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Ohwada R, Hotta M, Oikawa S, and Takano K
- Subjects
- Adolescent, Adult, Apolipoproteins blood, Cholesterol Ester Transfer Proteins blood, Cholesterol, HDL blood, Cholesterol, LDL blood, Female, Humans, Hypercholesterolemia blood, Incidence, Ketone Bodies blood, Triglycerides blood, Anorexia Nervosa epidemiology, Hypercholesterolemia epidemiology, Hypercholesterolemia etiology
- Abstract
Objective: Hypercholesterolemia is common in patients with anorexia nervosa (AN) despite emaciation. The objective of this study was to clarify the mechanism of hypercholesterolemia in AN., Method: We measured serum lipids in 39 patients with AN and analyzed serum lipid profiles in the 24 patients in comparison with five age-matched controls., Results: Mean serum levels of total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), ketone bodies, apolipoprotein (apo)-A1, B, C2, C3, E, and cholesterol ester transfer protein (CETP) activity were significantly higher in patients with AN than in controls. No significant difference in serum free fatty acid (FFA) levels was observed between patients with AN and controls. CETP was accelerated in patients with AN with hypercholesterolemia. No correlation was apparent between serum levels of cholesterol and thyroid hormones., Conclusion: Serum levels of cholesterol, CETP, and apolipoproteins decreased after weight gain, indicating that cholesterol metabolism is accelerated in patients with AN with normal serum levels of FFA., ((c) 2006 by Wiley Periodicals, Inc.)
- Published
- 2006
- Full Text
- View/download PDF
22. Ultrasonographic diagnosis of omasal leiomyoma in a cow.
- Author
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Mohamed T, Oikawa S, Koiwa M, Sato H, and Kurosawa T
- Subjects
- Animals, Cattle, Female, Gastrointestinal Neoplasms diagnostic imaging, Leiomyoma diagnostic imaging, Ultrasonography, Cattle Diseases diagnostic imaging, Gastrointestinal Neoplasms veterinary, Leiomyoma veterinary, Omasum diagnostic imaging
- Published
- 2004
- Full Text
- View/download PDF
23. Participation of mitogen-activated protein kinase in thapsigargin- and TPA-induced histamine production in murine macrophage RAW 264.7 cells.
- Author
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Shiraishi M, Hirasawa N, Kobayashi Y, Oikawa S, Murakami A, and Ohuchi K
- Subjects
- Animals, Blotting, Western, Calcium-Calmodulin-Dependent Protein Kinases antagonists & inhibitors, Cell Line, Flavonoids pharmacology, Imidazoles pharmacology, Macrophages drug effects, Mice, Mitogen-Activated Protein Kinase 1 antagonists & inhibitors, Mitogen-Activated Protein Kinases antagonists & inhibitors, Phosphorylation drug effects, Pyridines pharmacology, RNA, Messenger biosynthesis, Reverse Transcriptase Polymerase Chain Reaction, p38 Mitogen-Activated Protein Kinases, Enzyme Inhibitors pharmacology, Histamine Release drug effects, Macrophages metabolism, Mitogen-Activated Protein Kinases metabolism, Tetradecanoylphorbol Acetate pharmacology, Thapsigargin pharmacology
- Abstract
1. Stimulation of the murine macrophage cell line RAW 264.7 with thapsigargin, an endomembrane Ca(2+)-ATPase inhibitor, induced histamine production in a time- and concentration-dependent manner. 2. The protein kinase C activator, 12-O-tetradecanoylphorbol 13-acetate (TPA), also enhanced histamine production. 3. alpha-Fluoromethylhistidine, a suicide substrate of L-histidine decarboxylase (HDC), suppressed the thapsigargin (30 nM)- and TPA (30 nM)-induced histamine production. 4. Both thapsigargin (30 nM) and TPA (30 nM) induced phosphorylation of p44/p42 MAP kinase and p38 MAP kinase. 5. PD98059, a specific inhibitor of MEK-1 which phosphorylates p44/p42 MAP kinase, strongly suppressed both the thapsigargin (30 nM)- and TPA (30 nM)-induced histamine production, whereas SB203580, a specific inhibitor of p38 MAP kinase, inhibited them only partially. 6. The other MEK-1 inhibitor, U-0126, also inhibited both the thapsigargin- and TPA-induced histamine production in a concentration-dependent manner. 7. Thapsigargin (30 nM) and TPA (30 nM) increased the levels of HDC mRNA at 4 h, but PD98059 suppressed both the thapsigargin- and TPA-induced increases in the HDC mRNA level. 8. These findings indicate that thapsigargin and TPA induce histamine production in RAW 264.7 cells by increasing the level of HDC mRNA, and that both the thapsigargin- and TPA-induced histamine production are regulated largely by p44/p42 MAP kinase and partially by p38 MAP kinase.
- Published
- 2000
- Full Text
- View/download PDF
24. Determination of lipid hydroperoxides in low density lipoprotein from human plasma using high performance liquid chromatography with chemiluminescence detection.
- Author
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Miyazawa T, Fujimoto K, and Oikawa S
- Subjects
- Adolescent, Adult, Aged, Arteriosclerosis blood, Humans, Hyperlipidemias blood, Lipid Peroxides analysis, Lipoproteins, LDL analysis, Middle Aged, Chromatography, High Pressure Liquid methods, Lipid Peroxides blood, Lipoproteins, LDL blood, Luminescent Measurements
- Abstract
A high performance liquid chromatographic system with chemiluminescence detection (HPLC-CL) was used for determining phospholipid hydroperoxides in human plasma low density lipoprotein (LDL). This system involved separation of phospholipids from LDL-total lipids with normal phase silica gel HPLC and post-column detection of hydroperoxide-dependent chemiluminescence produced by luminol oxidation during the reaction of hydroperoxide with cytochrome c-haeme. By using HPLC-CL, we could detect phosphatidylcholine hydroperoxide (PCOOH) in human plasma LDL, and the LDL-PCOOH concentration was significantly higher in patients with atherosclerosis and hyperlipidemia than that of healthy volunteers. The LDL-PCOOH level was proportional to the plasma total cholesterol concentration.
- Published
- 1990
- Full Text
- View/download PDF
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