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Ito M, Yurube T, Kakutani K, Maeno K, Takada T, Terashima Y, Kakiuchi Y, Takeoka Y, Miyazaki S, Kuroda R, Nishida K. Selective interference of mTORC1/RAPTOR protects against human disc cellular apoptosis, senescence, and extracellular matrix catabolism with Akt and autophagy induction. Osteoarthritis Cartilage 2017; 25:2134-2146. [PMID: 28888905 DOI: 10.1016/j.joca.2017.08.019] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 08/11/2017] [Accepted: 08/30/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that integrates nutrients to execute cell growth and protein synthesis. We hypothesized that mTOR is essential for the intervertebral disc, the largest avascular, low-nutrient organ. Our objective was to elucidate roles of mTOR signaling in human disc cells. DESIGN The mTOR exists in two complexes: mTORC1 containing the regulatory-associated protein of mTOR (RAPTOR) and mTORC2 containing the rapamycin-insensitive companion of mTOR (RICTOR). To analyze their functions in human disc nucleus pulposus cells, RNA interference (RNAi) of mTOR targeting mTORC1 and mTORC2, RAPTOR targeting mTORC1, or RICTOR targeting mTORC2 or rapamycin, a pharmacological mTORC1 inhibitor, was applied. First, mTOR signaling including Akt, p70/ribosomal S6 kinase (p70/S6K), and autophagy were assessed. Then, apoptosis, senescence, and matrix metabolism were evaluated under pro-inflammatory interleukin-1 beta (IL-1β) stimulation. RESULTS Western blotting showed significant decreases in specific proteins by each RNAi (all P < 0.0001). In mTOR signaling, RNAi of mTOR and RICTOR decreased p70/S6K and Akt phosphorylation, whereas RAPTOR RNAi decreased p70/S6K but increased Akt phosphorylation. All RNAi treatments increased light chain 3 (LC3)-II and decreased p62/sequestosome 1 (p62/SQSTM1), indicating enhanced autophagy. In apoptosis, IL-1β-induced terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL)-positive cells and poly (ADP-ribose) polymerase (PARP) and caspase-9 cleavage decreased by RAPTOR RNAi. In senescence, IL-1β-induced senescence-associated beta-galactosidase (SA-β-gal)-positive cells and p16/INK4A expression also decreased by RAPTOR RNAi. In matrix metabolism, RAPTOR RNAi reduced IL-1β-induced catabolic matrix metalloproteinase (MMP) release and activation and up-regulated anabolic gene expression. These findings were all consistent with rapamycin administration. Additional disc-tissue analysis detected expression and phosphorylation of mTOR-signaling molecules in varying ages. CONCLUSION Selective interference of mTORC1/RAPTOR protects against inflammation-induced apoptosis, senescence, and matrix catabolism possibly through Akt and autophagy induction in human disc cells.
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Nishida K, Sawada D, Kawai T, Kuwano Y, Fujiwara S, Rokutan K. Para‐psychobiotic
Lactobacillus gasseri
CP
2305 ameliorates stress‐related symptoms and sleep quality. J Appl Microbiol 2017; 123:1561-1570. [DOI: 10.1111/jam.13594] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 07/27/2017] [Accepted: 09/20/2017] [Indexed: 12/20/2022]
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Yamashita W, Nishida K, Kawada S, Mori K, Usui S, Oyama J, Toriihara A, Tateishi U. Hooking intestine sign: a typical diagnostic CT finding of Petersen's hernia. Jpn J Radiol 2017; 35:718-723. [PMID: 29039111 DOI: 10.1007/s11604-017-0691-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 09/29/2017] [Indexed: 01/06/2023]
Abstract
PURPOSE To clarify typical diagnostic computed tomography (CT) findings of Petersen's hernia for differentiation from other causes of internal hernia observed in patients having undergone gastrectomy with Roux-en-Y gastric bypass. METHODS We retrospectively reviewed CT findings of internal hernia in patients who had undergone both gastrectomy and Roux-en-Y reconstruction and a second surgery for bowel obstruction. Thirteen patients with Petersen's hernia and 6 with internal hernia other than Petersen's hernia were investigated. Six CT findings, viz. whirl sign, mesenteric fat haziness, intestinal distension in the upper abdomen, herniated intestinal loop above the gastric level, middle/distal ileum courses downwards from the left hypochondrium, and hooking intestine sign, which means two or more intestines pass through the inner side of J-shaped vessels consisting of mesenteric vessels of the elevated jejunum, were scored and evaluated regarding their diagnostic performance. RESULTS The hooking intestine sign showed the highest sensitivity, specificity and accuracy (100%, 100% and 100%). We could detect J-shaped vessels in all Petersen's hernia patients. Inside the J-shaped vessels there were two or more intestinal tracts passing through in the Petersen's hernia group. There was only transverse colon inside the J-shaped vessels in the control group. CONCLUSION The hooking intestine sign may be useful for diagnosing Petersen's hernia on CT.
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Kawasaki M, Tsujino M, Sato F, Sakurada M, Nishida K, Kise T, Hijioka Y, Ishizawa M, Enatsu K, Ogawa Y. IgG4-related Hypophysitis with Subtle Hypopituitarism in an Elderly Diabetic Patient: Is Treatment or Observation Preferable? Intern Med 2017; 56:2733-2738. [PMID: 28924128 PMCID: PMC5675934 DOI: 10.2169/internalmedicine.8851-17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
A 70-year-old man with diabetes mellitus presented with an enlarged pituitary stalk in 2014. IgG4-related parotitis and submandibular sialoadenitis were diagnosed in 2012. He denied any symptoms related to a pituitary mass. His visual field was intact, and his hypopituitarism was subtle. The serum IgG4 level was elevated. A lip biopsy revealed strong fibrosis and hyper-infiltration of IgG4-positive plasma cells. Based on these findings, IgG4-related hypophysitis was diagnosed. The patient was carefully followed without specific intervention. His clinical condition showed no change until December 2016, suggesting a stable, natural course. Care should be taken when considering glucocorticoid therapy, especially for elderly diabetic patients, given possible side effects.
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Todo H, Nishida K, Fukuda A, Ogawa G, Ando R, Nishimoto K, Yamasaki H, Kawamoto K, Mitani M, Futamura N, Omote J, Fukunaga M, Kouyama K. Nocturnal hypoglycemia was revealed by continuous glucose monitoring in nondiabetic patients with advanced movement disorders under enteral nutrition. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Busch C, Koh S, Oie Y, Ichii M, Kanakura Y, Nishida K. Increased corneal densitometry as a subclinical corneal change associated with multiple myeloma. Eye (Lond) 2017; 31:1745-1746. [PMID: 28707673 DOI: 10.1038/eye.2017.132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Nobutani K, Sawada D, Fujiwara S, Kuwano Y, Nishida K, Nakayama J, Kutsumi H, Azuma T, Rokutan K. The effects of administration of the Lactobacillus gasseri strain CP2305 on quality of life, clinical symptoms and changes in gene expression in patients with irritable bowel syndrome. J Appl Microbiol 2017; 122:212-224. [PMID: 27761980 DOI: 10.1111/jam.13329] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/30/2016] [Accepted: 10/15/2016] [Indexed: 12/12/2022]
Abstract
AIMS To clarify the effects of Lactobacillus gasseri CP2305 (CP2305) on quality of life and clinical symptoms and its functional mechanisms in patients with irritable bowel syndrome (IBS). METHODS AND RESULTS After the patients were administered CP2305 daily for 4 weeks, the IBS-severity index score was significantly improved compared with that of the placebo group, and this improvement was accompanied by a reduction in health-related worry and changes in intestinal microbiota. The gene expression profiling of the peripheral blood leucocytes showed that CP2305 treatment significantly up-regulated genes related to eukaryotic initiation factor 2 (EIF2) signalling. Eighty-two genes were down-regulated in IBS patients compared with healthy controls. The expression of 23 of these genes exhibited a CP2305-dependent increase associated with an improvement in IBS severity. The majority of the restored genes were related to EIF2 signalling. CONCLUSIONS CP2305 administration is a potential candidate therapeutic option for patients with IBS. SIGNIFICANCE AND IMPACT OF THE STUDY Although probiotics have been proposed to benefit IBS patients, objective clinical evidence and elucidation of the functional mechanism remain insufficient. Our study demonstrated that CP2305 administration beneficially influences IBS patients in both subjective and objective evaluations, and gene expression profiling provided insights into the functional mechanism.
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Nishida K, Tenjimbayashi Y, Tasaka N, Shikama A, Sakuraiv M, Nakao S, Ochi H, Minaguchi T, Satoh T. Possible de novo clear cell carcinoma in the contralateral ovary 9 years after fertility-sparing surgery for Stage IA clear cell ovarian carcinoma. Int Cancer Conf J 2016; 6:50-54. [PMID: 31149470 PMCID: PMC6498281 DOI: 10.1007/s13691-016-0271-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 11/13/2016] [Indexed: 11/28/2022] Open
Abstract
A patient who underwent fertility-sparing surgery for Stage IA clear cell carcinoma may have developed de novo clear cell carcinoma in the contralateral ovary 9 years later. She underwent fertility-sparing surgery and postoperative adjuvant chemotherapy for right ovarian carcinoma at 33 years of age (when endometriosis was observed in the contralateral ovary). At the age of 41 years, a tumor was discovered in the left ovary. This was diagnosed pathologically as clear cell carcinoma with clear cell adenofibroma, which may have developed de novo. A consensus is currently taking shape that although fertility-sparing surgery is a therapeutic option for patients with Stage IA clear cell carcinoma, long-term outpatient monitoring is advised to watch for its recurrence or de novo development in the contralateral ovary.
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van Nieukerken EJ, Doorenweerd C, Nishida K, Snyers C. New taxa, including three new genera show uniqueness of Neotropical Nepticulidae (Lepidoptera). Zookeys 2016:1-63. [PMID: 27917037 PMCID: PMC5126387 DOI: 10.3897/zookeys.628.9805] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 08/25/2016] [Indexed: 11/20/2022] Open
Abstract
After finding distinct clades in a molecular phylogeny for Nepticulidae that could not be placed in any known genera and discovering clear apomorphic characters that define these clades, as well as a number of Neotropical species that could be placed in known genera but were undescribed, three new genera and nine new species are here described from the Neotropics: Stigmellagallicola van Nieukerken & Nishida, sp. n. reared from galls on Hampeaappendiculata (Malvaceae) in Costa Rica, representing the first example of a gall making Stigmella; Stigmellaschinivora van Nieukerken, sp. n. reared from leafmines on Schinusterebinthifolia (Anacardiaceae) in Argentina, Misiones; Stigmellacostaricensis van Nieukerken & Nishida, sp. n. and Stigmellaintronia van Nieukerken & Nishida, sp. n. each from a single specimen collected the same night in Costa Rica, Parque Nacional Chirripó; Stigmellamolinensis van Nieukerken & Snyers, sp. n. reared from leafmines on Salixhumboldtiana, Peru, Lima, the first Neotropical species of the Stigmellasalicis group sensu stricto; Ozadelpha van Nieukerken, gen. n. with type species Ozadelphaconostegiae van Nieukerken & Nishida, sp. n., reared from leafmines on Conostegiaoerstediana (Melastomataceae) from Costa Rica; Neotrifurcula van Nieukerken, gen. n. with type species Neotrifurculagielisorum van Nieukerken, sp. n. from Chile; Hesperolyra van Nieukerken, gen. n.. with type species Fomoriadiskusi Puplesis & Robinson, 2000; Hesperolyrasaopaulensis van Nieukerken, sp. n., reared from an unidentified Myrtaceae, Sao Paulo, Brasil; and Acalyptrisjanzeni van Nieukerken & Nishida, sp. n. from Costa Rica, Guanacaste. Five new combinations are made: Ozadelphaovata (Puplesis & Robinson, 2000), comb. n. and Ozadelphaguajavae (Puplesis & Diškus, 2002), comb. n., Hesperolyradiskusi (Puplesis & Robinson, 2000), comb. n., Hesperolyramolybditis (Zeller, 1877), comb. n. and Hesperolyrarepanda (Puplesis & Diškus, 2002), comb. n. Three specimens are briefly described, but left unnamed: Ozadelpha specimen EvN4680, Neotrifurcula specimen EvN4504 and Neotrifurcula specimen RH2.
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Nishida K, Takagi R. Teleseismic S wave microseisms. Science 2016; 353:919-21. [DOI: 10.1126/science.aaf7573] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 07/25/2016] [Indexed: 11/02/2022]
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61
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Kono M, Nishida K, Takeichi T, Sugiura K, Akiyama M. Ripple-pattern lichen amyloidosis in a case of ichthyosis vulgaris with a novelFLGmutation. J Eur Acad Dermatol Venereol 2016; 31:e130-e132. [DOI: 10.1111/jdv.13877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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62
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Nishida K, Sogabe Y, Makihara A, Senoo A, Morimoto H, Takeuchi M, Gion Y, Yoshino T, Sato Y. Ocular adnexal marginal zone lymphoma arising in a patient with IgG4-related ophthalmic disease. Mod Rheumatol 2016; 29:383-387. [PMID: 27686866 DOI: 10.1080/14397595.2016.1216733] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A 41-year-old man was diagnosed with immunoglobulin G4-related disease (IgG4-RD) in both eyelids 4 years ago and exhibited good response to steroid therapy. However, rapid swelling of the right eyelid lesion was recently observed. As IgG4-RD progression was suspected, biopsy was performed. Although the histology was consistent with IgG4-RD, the infiltrating large atypical lymphoid cells showed immunoglobulin light-chain restriction and IgH gene rearrangement. Consequently, he was diagnosed with extranodal marginal zone lymphoma with abundant IgG4-positive cells.
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63
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Takada M, Nishida K, Kataoka-Kato A, Gondo Y, Ishikawa H, Suda K, Kawai M, Hoshi R, Watanabe O, Igarashi T, Kuwano Y, Miyazaki K, Rokutan K. Probiotic Lactobacillus casei strain Shirota relieves stress-associated symptoms by modulating the gut-brain interaction in human and animal models. Neurogastroenterol Motil 2016; 28:1027-36. [PMID: 26896291 DOI: 10.1111/nmo.12804] [Citation(s) in RCA: 152] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 01/24/2016] [Indexed: 02/08/2023]
Abstract
BACKGROUND This study aimed to examine the effects of Lactobacillus casei strain Shirota (LcS) on gut-brain interactions under stressful conditions. METHODS Three double-blind, placebo-controlled trials were conducted to examine the effects of LcS on psychological and physiological stress responses in healthy medical students under academic examination stress. Subjects received LcS-fermented milk or placebo daily for 8 weeks prior to taking a national standardized examination. Subjective anxiety scores, salivary cortisol levels, and the presence of physical symptoms during the intervention were pooled and analyzed. In the animal study, rats were given feed with or without LcS for 2 weeks, then submitted to water avoidance stress (WAS). Plasma corticosterone concentration and the expression of cFos and corticotropin releasing factor (CRF) in the paraventricular nucleus (PVN) were measured immediately after WAS. In an electrophysiological study, gastric vagal afferent nerve activity was monitored after intragastric administration of LcS to urethane-anesthetized rats. KEY RESULTS Academic stress-induced increases in salivary cortisol levels and the incidence rate of physical symptoms were significantly suppressed in the LcS group compared with the placebo group. In rats pretreated with LcS, WAS-induced increases in plasma corticosterone were significantly suppressed, and the number of CRF-expressing cells in the PVN was reduced. Intragastric administration of LcS stimulated gastric vagal afferent activity in a dose-dependent manner. CONCLUSIONS & INFERENCES These findings suggest that LcS may prevent hypersecretion of cortisol and physical symptoms under stressful conditions, possibly through vagal afferent signaling to the brain and reduced stress reactivity in the PVN.
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Kojima T, Ishikawa H, Nishida K, Tanaka S, Haga N, Yukioka M, Miyahara H, Hashimoto J, KImura T, Oda H, Niki Y, Liu M, Kojima M, Ishiguro N. FRI0102 Characteristics of Functional Impairment in Patients with Long-Standing Rheumatoid Arthritis Based on Range of Motion of Joints: Multicenter Prospective Cohort Study for Evaluation of Joint Surgery on Physical Function. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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65
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Takeshita A, Kaneda D, Horita M, Machida T, Nakahara R, Nasu Y, Hashizume K, Nishida K, Ozaki T. AB0172 Usefulness of The Japanese Version of The Patient-Rated Elbow Evaluation in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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66
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Horita M, Kaneda D, Takeshita A, Machida T, Nakahara R, Nasu Y, Hashizume K, Nishida K, Ozaki T. AB0281 Body Image Disturbance in Patients with Rheumatoid Arthritis Who Requires Surgical Intervention. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.4798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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67
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Hashizume K, Nishida K, Nasu Y, Nakahara R, Machida T, Horita M, Takeshita A, Kaneda D, Natsumeda M, Ezawa K, Ozaki T. AB1014 Comparison between Arashi Score and Modified Total Sharp Score in The Evaluation of Large Joints Destruction in Patients with Rheumatoid Arthritis under Disease Control of Biologic Disease Modifying Anti-Rheumatic Drugs. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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68
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Kaneda D, Ohashi H, Takeshita A, Horita M, Machida T, Nakahara R, Nasu Y, Hashizume K, Nishida K, Ozaki T. AB0177 Patient-Reported Outcome of Upper Extremity Surgery for Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.4512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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69
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Tanaka Y, Takada S, Iizasa H, Hatzigeorgiou A, Miyazawa SI, Furumatsu T, Nishida K, Asahara H. THU0028 Microrna-381 Ameliorates Arthritis by Controlling Functions of Fibroblast-like Synoviocytes, Which Are Affected by A To I RNA Editing. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Taniguchi H, Katano T, Nishida K, Kinoshita H, Matsuda T, Ito S. Elucidation of the mechanism of suppressed steroidogenesis during androgen deprivation therapy of prostate cancer patients using a mouse model. Andrology 2016; 4:964-71. [PMID: 27230983 DOI: 10.1111/andr.12213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 04/05/2016] [Accepted: 04/06/2016] [Indexed: 11/30/2022]
Abstract
Androgen deprivation therapy (ADT) is the standard medical approach to the management of prostate cancer. Patients switched from a GnRH antagonist to a GnRH agonist, did not experience a testosterone surge in spite of the occurrence of luteinizing hormone (LH) surge in our protocol of clinical study. To clarify this observation, male mice pre-treated with two different doses of the GnRH antagonist degarelix for 28 days were further administered the GnRH agonist leuprolide or chorionic gonadotropin, and testosterone production of the mice was studied. Serum LH and testosterone levels, the size of Leydig cells, and expression level of steroidogenesis-related genes in the testis were analyzed. Treatment of mice with a high dose of degarelix (0.1 μg/mouse; HDG), but not a low dose (0.05 μg/mouse; LDG), for 28 days reproduced declined steroidogenesis observed in prostate cancer patients during ADT switched from a GnRH antagonist to a GnRH agonist. The size of the Leydig cells in the HDG mice was not significantly different from that in naive mice. Although expression levels of StAR, P450scc, and 17β HSD increased significantly in the LDH testis, those in the HDG testis did not change. Treatment of mice with a high dose of degarelix for 28 days reproduced the decline in steroidogenesis observed in prostate cancer patients during ADT. In this animal model, we demonstrated that initial ADT may inhibit the ability of Leydig cells to produce testosterone by suppressing the expression of genes involved in steroidogenesis, such as StAR, P450scc, and 17βHSD.
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Taniguchi H, Katano T, Nishida K, Yao I, Morimoto Y, Matsuda T, Ito S. Expression of hOvol2 in the XY body of human spermatocytes. Andrologia 2016; 49. [DOI: 10.1111/and.12599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2016] [Indexed: 11/30/2022] Open
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Kato-Kataoka A, Nishida K, Takada M, Suda K, Kawai M, Shimizu K, Kushiro A, Hoshi R, Watanabe O, Igarashi T, Miyazaki K, Kuwano Y, Rokutan K. Fermented milk containing Lactobacillus casei strain Shirota prevents the onset of physical symptoms in medical students under academic examination stress. Benef Microbes 2016; 7:153-6. [DOI: 10.3920/bm2015.0100] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This pilot study investigated the effects of the probiotic Lactobacillus casei strain Shirota (LcS) on psychological, physiological, and physical stress responses in medical students undertaking an authorised nationwide examination for promotion. In a double-blind, placebo-controlled trial, 24 and 23 healthy medical students consumed a fermented milk containing LcS and a placebo milk, respectively, once a day for 8 weeks until the day before the examination. Psychophysical state, salivary cortisol, faecal serotonin, and plasma L-tryptophan were analysed on 5 different sampling days (8 weeks before, 2 weeks before, 1 day before, immediately after, and 2 weeks after the examination). Physical symptoms were also recorded in a diary by subjects during the intervention period for 8 weeks. In association with a significant elevation of anxiety at 1 day before the examination, salivary cortisol and plasma L-tryptophan levels were significantly increased in only the placebo group (P<0.05). Two weeks after the examination, the LcS group had significantly higher faecal serotonin levels (P<0.05) than the placebo group. Moreover, the rate of subjects experiencing common abdominal and cold symptoms and total number of days experiencing these physical symptoms per subject were significantly lower in the LcS group than in the placebo group during the pre-examination period at 5-6 weeks (each P<0.05) and 7-8 weeks (each P<0.01) during the intervention period. Our results suggest that the daily consumption of fermented milk containing LcS may exert beneficial effects preventing the onset of physical symptoms in healthy subjects exposed to stressful situations.
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Liu L, Nishida K, Dohi K, Nomoto A, Soneda N, Murakami K, Li Z, Chen D, Sekimura N. Effects of solute elements on hardening and microstructural evolution in neutron-irradiated and thermally-aged reactor pressure vessel model alloys. J NUCL SCI TECHNOL 2016. [DOI: 10.1080/00223131.2015.1136902] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lettry J, Aguglia D, Alessi J, Andersson P, Bertolo S, Briefi S, Butterworth A, Coutron Y, Dallocchio A, David N, Chaudet E, Faircloth D, Fantz U, Fink DA, Garlasche M, Grudiev A, Guida R, Hansen J, Haase M, Hatayama A, Jones A, Koszar I, Lallement JB, Lombardi AM, Machado C, Mastrostefano C, Mathot S, Mattei S, Moyret P, Nisbet D, Nishida K, O'Neil M, Paoluzzi M, Scrivens R, Shibata T, Steyaert D, Thaus N, Voulgarakis G. Linac4 H⁻ ion sources. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:02B139. [PMID: 26932021 DOI: 10.1063/1.4936120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
CERN's 160 MeV H(-) linear accelerator (Linac4) is a key constituent of the injector chain upgrade of the Large Hadron Collider that is being installed and commissioned. A cesiated surface ion source prototype is being tested and has delivered a beam intensity of 45 mA within an emittance of 0.3 π ⋅ mm ⋅ mrad. The optimum ratio of the co-extracted electron- to ion-current is below 1 and the best production efficiency, defined as the ratio of the beam current to the 2 MHz RF-power transmitted to the plasma, reached 1.1 mA/kW. The H(-) source prototype and the first tests of the new ion source optics, electron-dump, and front end developed to minimize the beam emittance are presented. A temperature regulated magnetron H(-) source developed by the Brookhaven National Laboratory was built at CERN. The first tests of the magnetron operated at 0.8 Hz repetition rate are described.
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Shibata T, Nishida K, Mochizuki S, Mattei S, Lettry J, Hatayama A, Ueno A, Oguri H, Ohkoshi K, Ikegami K, Takagi A, Asano H, Naito F. Numerical study of plasma generation process and internal antenna heat loadings in J-PARC RF negative ion source. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:02B128. [PMID: 26932010 DOI: 10.1063/1.4931787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A numerical model of plasma transport and electromagnetic field in the J-PARC (Japan Proton Accelerator Research Complex) radio frequency ion source has been developed to understand the relation between antenna coil heat loadings and plasma production/transport processes. From the calculation, the local plasma density increase is observed in the region close to the antenna coil. Electrons are magnetized by the magnetic field line with absolute magnetic flux density 30-120 Gauss which leads to high local ionization rate. The results suggest that modification of magnetic configuration can be made to reduce plasma heat flux onto the antenna.
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