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Eriksson Y, Nakamoto M, Orita H, Miyahira T, Aoyama H, Hokama A. Early Gastric Cancer Concurrent with Gastritis Cystica Profunda Resembling Advanced Cancer. Chonnam Med J 2024; 60:87-88. [PMID: 38304123 PMCID: PMC10828076 DOI: 10.4068/cmj.2024.60.1.87] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 09/26/2023] [Indexed: 02/03/2024] Open
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Koishi M, Tomota K, Nakamoto M, Yoshida H. Direct Suzuki‐Miyaura Coupling of Naphthalene‐1,8‐diaminato (dan)‐Substituted Cyclopropylboron Compounds. Adv Synth Catal 2023. [DOI: 10.1002/adsc.202300059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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Kaku H, Toyonaga T, Tanaka S, Takihara H, Baba S, Tsubouchi E, Ikeda Y, Orita H, Nakamoto M, Horikawa Y, Chiba H, Ban H, Furumoto Y, Morita R, Kodama Y. Endoscopic Submucosal Dissection Using EndoTrac, a Novel Traction Device. Digestion 2021; 102:714-721. [PMID: 33352560 DOI: 10.1159/000511731] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 09/20/2020] [Indexed: 02/04/2023]
Abstract
BACKGROUND Endoscopic submucosal dissection (ESD) is recognized as a minimally invasive and curative treatment for superficial gastrointestinal (GI) cancers. However, ESD is still challenging and time-consuming with a high risk of adverse events such as bleeding and perforation. Various traction methods have been explored for maintaining good visualization of the submucosal layer during ESD. We developed a novel traction device (the EndoTrac) which can easily tie the thread and has the ability to change the towing direction. The aim of this study is to evaluate safety and feasibility of ESD using the EndoTrac for GI neoplasms. PATIENTS AND METHODS We retrospectively analyzed 44 patients (45 lesions) with esophageal, gastric, duodenal, and colorectal neoplasms who had undergone ESD using the EndoTrac device between June 2018 and May 2019. Primary outcome measures were preparation time, procedural success using the EndoTrac device, and ease of ability to change towing direction. RESULTS Mean preparation time was 2 (2-5) min in esophagus, 3 (1-5) min in stomach, 6 (5-9) min in duodenum, and 4 (2-8) min in colorectum. The procedural success rate was 100% (8/8) in esophagus, 100% (21/21) in stomach, 100% (4/4) in duodenum, and 100% (12/12) in colorectum. The rate of successful towing to both proximal and distal sides was 100% (8/8) in esophagus, 100% (21/21) in stomach, 0% (0/4) in duodenum, and 100% (12/12) in colorectum. CONCLUSIONS Use of the EndoTrac device appears to be a feasible approach to ESD for GI neoplasms.
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Kirita K, Sugiyama E, Togashi Y, Udagawa H, Irie T, Iida S, Nakamoto M, Nomura S, Ikeda T, Zenke Y, Matsumoto S, Yoh K, Niho S, Sato A, Nishikawa H, Goto K. Clinical utility of precision immunoprofiling and monitoring of the tumour microenvironment using flow cytometry and CyTOF in patients with advanced NSCLC treated with atezolizumab: Results from a phase II study for biomarker analysis (EPOC1702). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz253.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Toyonaga T, Ohara Y, Baba S, Takihara H, Nakamoto M, Orita H, Okuda J. Peranal endoscopic myectomy (PAEM) for rectal lesions with severe fibrosis and exhibiting the muscle-retracting sign. Endoscopy 2018; 50:813-817. [PMID: 29883977 DOI: 10.1055/a-0602-3905] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Although endoscopic submucosal dissection has enabled complete tumor resection and accurate pathological assessment in a manner that is less invasive than surgery, the complete resection of lesions with severe fibrosis in the submucosal layer and exhibiting the muscle-retracting sign is often difficult. We have devised a new method, peranal endoscopic myectomy (PAEM), for rectal lesions with severe fibrosis, in which dissection is performed between the inner circular and outer longitudinal muscles, and have examined the usefulness and safety of this new technique. METHODS All of the patients who underwent PAEM in our hospital and affiliated hospitals between July 2015 and June 2017 were retrospectively reviewed. RESULTS 10 rectal lesions were treated with PAEM. En bloc resection with a negative vertical margin was achieved in eight patients (80 %), whose lesions were mucosal (n = 2), shallow submucosal (n = 1), deep submucosal (n = 4), and muscle invasive (n = 1). The clinical course of all patients after PAEM was favorable. In patients who underwent additional surgery, anus preservation was achieved on the basis of the pathological results from PAEM. CONCLUSIONS PAEM for lesions with severe fibrosis exhibiting the muscle-retracting sign appears to be both safe and useful.
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Yoshikawa Y, Nakamoto M, Hoshi T, Nakamura M, Imai S, Kawase Y, Matsuo H, Saito N. P1788A novel software for on-site estimation of fractional flow reserve using coronary computed tomography images. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Koizumi N, Kajitani H, Matsui K, Hemmi T, Yamane M, Ando S, Nakamoto M, Takano K. Series production of ITER toroidal field coil double pancakes in Japan. FUSION ENGINEERING AND DESIGN 2017. [DOI: 10.1016/j.fusengdes.2017.03.083] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Yoshino T, Kuboki Y, Nishina T, Shinozaki E, Yamazaki K, Shitara K, Okamoto W, Kajiwara T, Matsumoto T, Tsushima T, Mochizuki N, Fukutani M, Nakamoto M, Hasegawa H, Sugama A, Nomura S, Sato A, Ohtsu A. PD-013 Final survival results of a multicenter phase I/II study of TAS-102 with bevacizumab for metastatic colorectal cancer patients refractory to standard therapies (C-TASK FORCE). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw200.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Otsuka R, Kato Y, Nishita Y, Tange C, Tomida M, Nakamoto M, Imai T, Ando F, Shimokata H. Age-related Changes in Energy Intake and Weight in Community-dwelling Middle-aged and Elderly Japanese. J Nutr Health Aging 2016; 20:383-90. [PMID: 26999237 DOI: 10.1007/s12603-016-0715-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE This study attempts to describe trends in energy intake and weight change over 12 years according to age at first participation in the study. DESIGN Prospective cohort study. SETTING The National Institute for Longevity Sciences - Longitudinal Study of Aging (NILS-LSA), a community-based study. PARTICIPANTS Participants included 922 men and 879 women who participated in the first study-wave (age 40-79 years) and also participated in at least one study-wave from the second to seventh study-wave. Each study-wave was conducted biennially. For individuals, the entire follow-up period was 12 years. MEASUREMENTS Energy intake was calculated from 3-day dietary records with photographs. Weight and height were measured under a fasting state. To estimate linear changes in energy intake and weight over 12 years according to age at first study-wave, we used the mixed-effects model. RESULTS Mean (SD) follow-up time and number of study-wave visits were 9.5 (3.7) years and 5.4 (1.8) times, respectively. The fixed effect of the interaction of age and time in energy intake and weight was statistically or marginally statistically significant both in men (p<0.01) and in women (p<0.06). In men, when energy intake was estimated according to age, the rate of decrease in energy intake increased from -6.8 to -33.8 kcal/year for ages 40-79 years. In women, the rate of decrease in energy intake slightly increased in older age groups (-9.1 to -16.7 kcal/year for ages 40-79 years). Weight increased in males in their 40s (0.07 kg/year from age 40) and started to decline by age 53. In women, weight started to decline around age 47 (-0.04 kg/year). CONCLUSION Twelve-year longitudinal data showed energy intake declined both in men and women in their 40s, and the rate of decrease increased in older males. Weight started to decline in men in their mid-50s and women in their late 40s. Further studies that focus on energy intake and weight reduction are needed to prevent weight loss or underweight in an increasingly aging society.
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Hirosue A, Nakamoto M, Yamamoto T, Matsuoka Y, Nakamura C, Kawahara K, Yoshida R, Hiraki A, Nakayama H, Shinohara M. Epigenetic alterations in chemoresistance and radioresistance of oral squamous cell carcinoma. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Imaeda N, Wakai K, Goto C, Kamano SK, Nanri H, Hosono S, Oze I, Watanabe M, Fukuda N, Yamaguchi M, Nakamoto M, Nakahata NT, Tanaka H, Group JMS. Optimal Food Consumption among Japanese Adults with Adequate Nutritional Intake According to the Dietary Reference Intakes for Japanese. Int J Epidemiol 2015. [DOI: 10.1093/ije/dyv096.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Nahar S, Nakamoto M, Hokama A, Kobashigawa C, Kaida M, Kinjo T, Hirata T, Kinjo N, Saio M, Yoshimi N, Ohtsuki Y, Fujita J. Peritoneal Malignant Mesothelioma with Epithelioid Type, Demonstrating High Serum and Ascitic KL-6 Levels: Immunohistochemical Analyses. Rare Tumors 2015; 7:5947. [PMID: 26500734 PMCID: PMC4600996 DOI: 10.4081/rt.2015.5947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 06/14/2015] [Indexed: 11/22/2022] Open
Abstract
We report a case of KL-6 producing peritoneal malignant mesothelioma. A 56-year-old woman was referred to our hospital on November 2005 with severe abdominal distention. Peritoneal malignant mesothelioma with epithelioid type was diagnosed by clinical symptoms, laboratory investigations, imaging studies, and immunohistochemical examination of known tumor markers. In addition, high serum and ascitic KL-6 levels were observed and the immunostaining of the tumor for KL-6 was evident. We thus consider KL-6 to be a potential novel marker for peritoneal malignant mesothelioma with epithelioid type.
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Yamazaki K, Kuboki Y, Nishina T, Shinozaki E, Shitara K, Okamoto W, Kajiwara T, Matsumoto T, Tsushima T, Mochizuki N, Fukutani M, Nakamoto M, Hasegawa Y, Sugama A, Nomura S, Sato A, Ohtsu A, Yoshino T. 2116 A multicenter phase I/II study of TAS-102 with bevacizumab for metastatic colorectal cancer refractory to standard therapies (C-TASK FORCE). Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31038-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Yamashita Y, Yakiwara H, Asano Y, Shimizu H, Uchida K, Hirano S, Umakoshi K, Miyamachi H, Nakamoto M, Fukui M, Kamizono M, Kanehara H, Yamada T, Shinohara M, Obara K. Migrating tremor off southern Kyushu as evidence for slow slip of a shallow subduction interface. Science 2015; 348:676-9. [DOI: 10.1126/science.aaa4242] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 03/30/2015] [Indexed: 11/02/2022]
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Paul-Prasanth B, Bhandari RK, Kobayashi T, Horiguchi R, Kobayashi Y, Nakamoto M, Shibata Y, Sakai F, Nakamura M, Nagahama Y. Erratum: Estrogen oversees the maintenance of the female genetic program in terminally differentiated gonochorists. Sci Rep 2015. [PMCID: PMC3892714 DOI: 10.1038/srep03787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Hirosue A, Nakamura C, Nakamoto M, Kawahara K, Muta A, Hirayama M, Yoshida R, Nagata M, Nakayama H, Hiraki A, Shinohara M. Epigenetic alterations in the drug resistance of oral squamous cell carcinoma. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Van Compernolle B, Bortnik J, Pribyl P, Gekelman W, Nakamoto M, Tao X, Thorne RM. Direct detection of resonant electron pitch angle scattering by whistler waves in a laboratory plasma. PHYSICAL REVIEW LETTERS 2014; 112:145006. [PMID: 24765981 DOI: 10.1103/physrevlett.112.145006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Indexed: 06/03/2023]
Abstract
Resonant interactions between energetic electrons and whistler mode waves are an essential ingredient in the space environment, and in particular in controlling the dynamic variability of Earth's natural radiation belts, which is a topic of extreme interest at the moment. Although the theory describing resonant wave-particle interaction has been present for several decades, it has not been hitherto tested in a controlled laboratory setting. In the present Letter we report on the first laboratory experiment to directly detect resonant pitch angle scattering of energetic (∼keV) electrons due to whistler mode waves. We show that the whistler mode wave deflects energetic electrons at precisely the predicted resonant energy, and that varying both the maximum beam energy, and the wave frequency, alters the energetic electron beam very close to the resonant energy.
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Otsuka R, Kato Y, Nishita Y, Tange C, Nakamoto M, Tomida M, Imai T, Ando F, Shimokata H. Cereal Intake Increases and Dairy Products Decrease Risk of Cognitive Decline among Elderly Female Japanese. JPAD-JOURNAL OF PREVENTION OF ALZHEIMERS DISEASE 2014; 1:160-167. [PMID: 29251743 DOI: 10.14283/jpad.2014.29] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND If cognitive decline can be prevented through changes in daily diet with no medical intervention, it will be highly significant for dementia prevention. OBJECTIVES This longitudinal study examined the associations of different food intakes on cognitive decline among Japanese subjects. DESIGN Prospective cohort study. SETTING The National Institute for Longevity Sciences - Longitudinal Study of Aging, a community-based study. PARTICIPANTS Participants included 298 males and 272 females aged 60 to 81 years at baseline who participated in the follow-up study (third to seventh wave) at least one time. MEASUREMENTS Cognitive function was assessed with the Mini-Mental State Examination (MMSE) in all study waves. Nutritional intake was assessed using a 3-day dietary record in the second wave. Cumulative data among participants with an MMSE >27 in the second wave were analyzed using a generalized estimating equation. Multivariate adjusted odds ratios (OR) and 95% confidence intervals (CI) for an MMSE score ≤27 in each study wave according to a 1 standard deviation (SD) increase of each food intake at baseline were estimated, after adjusting for age, follow-up time, MMSE score at baseline, education, body mass index, annual household income, current smoking status, energy intake, and history of diseases. RESULTS In men, after adjusting for age, and follow-up period, MMSE score at baseline, the adjusted OR for a decline in MMSE score was 1.20 (95% CI, 1.02-1.42; p=0.032) with a 1-SD increase in cereal intake. After adjusting for education and other confounding variables, the OR for a decrease in MMSE score did not reach statistical significance for this variable. In women, multivariate adjusted OR for MMSE decline was 1.43 (95% CI, 1.15-1.77; p=0.001) with a 1-SD increase in cereal intake and 0.80 (95% CI, 0.65-0.98; p=0.034) with a 1-SD increase in milk and dairy product intake. CONCLUSIONS This study indicates that a 1-SD (108 g/day) decrease in cereal intake and a 1-SD (128 g/day) increase in milk and dairy product intake may have an influence of cognitive decline in community-dwelling Japanese women aged 60 years and older. Further studies are needed in order to explore the potential causal relationship.
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Uemura H, Katsuura-Kamano S, Yamaguchi M, Nakamoto M, Hiyoshi M, Arisawa K. Abundant daily non-sedentary activity is associated with reduced prevalence of metabolic syndrome and insulin resistance. J Endocrinol Invest 2013; 36:1069-75. [PMID: 23886980 DOI: 10.3275/9066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Non-exercise activity thermogenesis has recently drawn attention because of its potential to prevent weight gain. AIM This study evaluated the relationships between the duration of daily non-sedentary activities and the prevalence of metabolic syndrome and insulin resistance (IR) in the Japanese population. MATERIAL/SUBJECTS AND METHODS A total of 518 eligible subjects (380 men and 138 women) who attended the Tokushima Prefectural General Health Checkup Center and participated in the baseline survey of a cohort study conducted in Tokushima Prefecture, Japan were analyzed. Information about lifestyle characteristics including leisure-time exercise and daily non-exercise activities was obtained from a questionnaire. Logistic and multiple linear regression analyses were performed to evaluate the associations between the duration of daily non-exercise non-sedentary activities (beyond sitting) and prevalence of metabolic syndrome (and its components) and IR. RESULTS Subjects with longer duration of daily non-sedentary activities had significantly lower adjusted odds ratios for metabolic syndrome (p for trend =0.024), abdominal obesity (p for trend =0.023), and low HDLcholesterol levels (p for trend =0.002), after adjustment for sex, age, and other probable covariates including leisure-time exercise. Longer duration of daily non-sedentary activities was further associated with lower homeostasis model of assessment- IR (HOMA-IR) values (p for trend =0.009). CONCLUSIONS Our results suggest that abundant daily non-sedentary activity might be associated with a lower prevalence of metabolic syndrome, especially for the components of central obesity and low HDL-cholesterol levels, and with a lower prevalence of IR, independent of leisure-time exercise.
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Kodani M, Igishi T, Sakamoto T, Touge H, Izumi H, Ito S, Kurai J, Yamaguchi K, Nakamoto M, Shimizu E. Rechallenge with EGFR-TKI after a Drug Holiday, Retrospective Study in Single Institution. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.60] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Paul-Prasanth B, Bhandari RK, Kobayashi T, Horiguchi R, Kobayashi Y, Nakamoto M, Shibata Y, Sakai F, Nakamura M, Nagahama Y. Estrogen oversees the maintenance of the female genetic program in terminally differentiated gonochorists. Sci Rep 2013; 3:2862. [PMID: 24096556 PMCID: PMC3791451 DOI: 10.1038/srep02862] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 09/12/2013] [Indexed: 11/09/2022] Open
Abstract
The sexual plasticity of the gonads is not retained after the completion of sex differentiation in vertebrates, except in some hermaphroditic species. Here, we report that the depletion of estradiol-17β (E2) by aromatase inhibitors (AI) for up to six months resulted in a functional female-to-male sex reversal in sexually-mature adults of two gonochoristic fish species, Nile tilapia and medaka. The sex-reversed fish showed a typical male pattern of E2 and androgen levels, secondary sexual characteristics, and male-like sex behavior, producing fertile sperm. Conversely, co-treatment of E2 inhibited AI-induced sex reversal. In situ hybridization of medaka gonads during AI-induced sex reversal indicated that cysts on the dorsal side of the adult ovaries are the origin of germ cells and Sertoli cells in the newly formed testicular tissue. Gonochoristic fish maintain their sexual plasticity until adulthood and E2 plays a critical role in maintaining the female phenotype.
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Iraha A, Chinen H, Hokama A, Yonashiro T, Kinjo T, Kishimoto K, Nakamoto M, Hirata T, Kinjo N, Higa F, Tateyama M, Kinjo F, Fujita J. Fucoidan enhances intestinal barrier function by upregulating the expression of claudin-1. World J Gastroenterol 2013; 19:5500-5507. [PMID: 24023493 PMCID: PMC3761103 DOI: 10.3748/wjg.v19.i33.5500] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 07/07/2013] [Accepted: 07/25/2013] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the protective effects of fucoidan on oxidative stress-induced barrier disruption in human intestinal epithelial cells.
METHODS: In Caco-2 cell monolayer models, the disruption of barrier function by oxidative stress is mediated by H2O2. The integrity of polarized Caco-2 cell monolayers was determined by measuring the transepithelial resistance (TER) and permeability was estimated by measuring the paracellular transport of FITC-labeled 4-kDa dextran (FD4). The protective effects of fucoidan on epithelial barrier functions on polarized Caco-2 cell monolayers were evaluated by TER and FD4 flux. The expression of tight junction (TJ) proteins was assessed using reverse-transcription polymerase chain reaction (RT-PCR) and immunofluorescence staining.
RESULTS: Without H2O2 treatment, fucoidan significantly increased the TER compared to control (P < 0.05), indicating a direct enhancement of intestinal epithelial barrier function. Next, H2O2 disrupted the epithelial barrier function in a time-dependent manner. Fucoidan prevented the H2O2-induced destruction in a dose-dependent manner. Fucoidan significantly decreased H2O2-induced FD4 flux (P < 0.01), indicating the prevention of disruption in paracellular permeability. RT-PCR showed that Caco-2 cells endogenously expressed claudin-1 and -2, and occludin and that H2O2 reduced the mRNA expression of these TJ proteins. Treatment with fucoidan attenuated the reduction in the expressions of claudin-1 and claudin-2 but not occludin. Immunofluorescence staining revealed that the expression of claudin-1 was intact and high on the cell surface. H2O2 disrupted the integrity of claudin-1. Treatment with fucoidan dramatically attenuated the expression of claudin-1.
CONCLUSION: Fucoidan enhanced intestinal epithelial barrier function by upregulating the expression of claudin-1. Thus, fucoidan may be an appropriate therapy for the treatment of inflammatory bowel diseases.
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Ohira T, Hokama A, Kinjo N, Nakamoto M, Kobashigawa C, Kise Y, Yamashiro S, Kinjo F, Kuniyoshi Y, Fujita J. Detection of active bleeding from gastric antral vascular ectasia by capsule endoscopy. World J Gastrointest Endosc 2013; 5:138-140. [PMID: 23515703 PMCID: PMC3600552 DOI: 10.4253/wjge.v5.i3.138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 10/29/2012] [Accepted: 01/07/2013] [Indexed: 02/05/2023] Open
Abstract
Gastric antral vascular ectasia (GAVE) has been recognized as one of the important causes of occult and obscure gastrointestinal bleeding. The diagnosis is typically made based on the characteristic endoscopic features, including longitudinal row of flat, reddish stripes radiating from the pylorus into the antrum that resemble the stripes on a watermelon. These appearances, however, can easily be misinterpreted as moderate to severe gastritis. Although it is believed that capsule endoscopy (CE) is not helpful for the study of the stomach with its large lumen, GAVE can be more likely to be detected at CE rather than conventional endoscopy. CE can be regarded as “physiologic” endoscopy, without the need for gastric inflation and subsequent compression of the vasculature. The blood flow of the ecstatic vessels may be diminished in an inflated stomach. Therefore, GAVE may be prominent in CE. We herein describe a case of active bleeding from GAVE detected by CE and would like to emphasize a possibility that CE can improve diagnostic yields for GAVE.
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Ihama Y, Hokama A, Hibiya K, Kishimoto K, Nakamoto M, Hirata T, Kinjo N, Cash HL, Higa F, Tateyama M, Kinjo F, Fujita J. Diagnosis of intestinal tuberculosis using a monoclonal antibody to Mycobacterium tuberculosis. World J Gastroenterol 2012; 18:6974-80. [PMID: 23322996 PMCID: PMC3531682 DOI: 10.3748/wjg.v18.i47.6974] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 07/19/2012] [Accepted: 07/28/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the utility of immunohistochemical (IHC) staining with an antibody to Mycobacterium tuberculosis (M. tuberculosis) for the diagnosis of intestinal tuberculosis (TB).
METHODS: We retrospectively identified 10 patients (4 males and 6 females; mean age = 65.1 ± 13.6 years) with intestinal TB. Clinical characteristics, including age, gender, underlying disease, and symptoms were obtained. Chest radiograph and laboratory tests, including sputum Ziehl-Neelsen (ZN) staining, M. tuberculosis culture, and sputum polymerase chain reaction (PCR) for tubercle bacilli DNA, as well as Tuberculin skin test (TST) and QuantiFERON-TB gold test (QFT), were examined. Colonoscopic records recorded on the basis of Sato’s classification were also reviewed, in addition to data from intestinal biopsies examined for histopathological findings, including hematoxylin and eosin staining, and ZN staining, as well as M. tuberculosis culture, and PCR for tubercle bacilli DNA. For the present study, archived formalin-fixed paraffin-embedded (FFPE) intestinal tissue samples were immunohistochemically stained using a commercially available species-specific monoclonal antibody to the 38-kDa antigen of the M. tuberculosis complex. These sections were also stained with the pan-macrophage marker CD68 antibody.
RESULTS: From the clinical data, we found that no patients were immunocompromised, and that the main symptoms were diarrhea and weight loss. Three patients displayed active pulmonary TB, six patients (60%) had a positive TST, and 4 patients (40%) had a positive QFT. Colonoscopic findings revealed that all patients had type 1 findings (linear ulcers in a circumferential arrangement or linear ulcers arranged circumferentially with mucosa showing multiple nodules), all of which were located in the right hemicolon and/or terminal ileum. Seven patients (70%) had concomitant healed lesions in the ileocecal area. No acid-fast bacilli were detected with ZN staining of the intestinal tissue samples, and both M. tuberculosis culture and PCR for tubercle bacilli DNA were negative in all samples. The histopathological data revealed that tuberculous granulomas were present in 4 cases (40%). IHC staining in archived FFPE samples with anti-M. tuberculosis monoclonal antibody revealed positive findings in 4 patients (40%); the same patients in which granulomas were detected by hematoxylin and eosin staining. M. tuberculosis antigens were found to be mostly intracellular, granular in pattern, and primarily located in the CD68+ macrophages of the granulomas.
CONCLUSION: IHC staining with a monoclonal antibody to M. tuberculosis may be an efficient and simple diagnostic tool in addition to classic examination methods for the diagnosis of intestinal TB.
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Hokama A, Kishimoto K, Ihama Y, Kobashigawa C, Nakamoto M, Hirata T, Kinjo N, Higa F, Tateyama M, Kinjo F, Iseki K, Kato S, Fujita J. Endoscopic and radiographic features of gastrointestinal involvement in vasculitis. World J Gastrointest Endosc 2012; 4:50-6. [PMID: 22442741 PMCID: PMC3309893 DOI: 10.4253/wjge.v4.i3.50] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Revised: 11/04/2011] [Accepted: 03/01/2012] [Indexed: 02/05/2023] Open
Abstract
Vasculitis is an inflammation of vessel walls, followed by alteration of the blood flow and damage to the dependent organ. Vasculitis can cause local or diffuse pathologic changes in the gastrointestinal (GI) tract. The variety of GI lesions includes ulcer, submucosal edema, hemorrhage, paralytic ileus, mesenteric ischemia, bowel obstruction, and life-threatening perforation.The endoscopic and radiographic features of GI involvement in vasculitisare reviewed with the emphasis on small-vessel vasculitis by presenting our typical cases, including Churg-Strauss syndrome, Henoch-Schönlein purpura, systemic lupus erythematosus, and Behçet’s disease. Important endoscopic features are ischemic enterocolitis and ulcer. Characteristic computed tomographic findings include bowel wall thickening with the target sign and engorgement of mesenteric vessels with comb sign. Knowledge of endoscopic and radiographic GI manifestations can help make an early diagnosis and establish treatment strategy.
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