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| 1 | Urgent endoscopic ultrasound-guided choledochoduodenostomy for acute obstructive suppurative cholangitis-induced sepsis显示文摘Acute obstructive suppurative cholangitis(AOSC) due to biliary lithiasis is a life-threatening condition that requires urgent biliary decompression. Although endoscopic retrograde cholangiopancreatography(ERCP) with stent placement is the current gold standard for biliary decompression, it can sometimes be difficult because of failed biliary cannulation. In this retrospective case series, we describe three cases of successful biliary drainage with recovery from septic shock after urgent endoscopic ultrasound-guided choledochoduodenostomy(EUS-CDS) was performed for AOSC due to biliary lithiasis. In all three cases, technical success in inserting the stents was achieved and the patients completely recovered from AOSC with sepsis in a few days after EUS-CDS. There were no procedure-related complications. When initial ERCP fails, EUS-CDS can be an effective life-saving endoscopic biliary decompression procedure that shortens the procedure time and prevents post-ERCP pancreatitis, particularly in patients with AOSC-induced sepsis. | Kosuke Minaga Masayuki Kitano Hajime Imai Kentaro Yamao Ken Kamata Takeshi Miyata Shunsuke Omoto Kumpei Kadosaka Tomoe Yoshikawa Masatoshi Kudo | 2016 | World Journal of Gastroenterology2016，22，16： | 18 |
| 2 | Endoscopic ultrasound-guided gallbladder drainage for acute cholecystitis: Long-term outcomes after removal of a self-expandable metal stent显示文摘AIM To assess the long-term outcomes of this procedure after removal of self-expandable metal stent(SEMS). The efficacy and safety of endoscopic ultrasoundguided gallbladder drainage(EUS-GBD) with SEMS were also assessed.METHODS Between January 2010 and April 2015, 12 patients with acute calculous cholecystitis, who were deemed unsuitable for cholecystectomy, underwent EUSGBD with a SEMS. EUS-GBD was performed under the guidance of EUS and fluoroscopy, by puncturing the gallbladder with a needle, inserting a guidewire, dilating the puncture hole, and placing a SEMS. TheSEMS was removed and/or replaced with a 7-Fr plastic pigtail stent after cholecystitis improved. The technical and clinical success rates, adverse event rate, and recurrence rate were all measured.RESULTS The rates of technical success, clinical success, and adverse events were 100%, 100%, and 0%, respectively. After cholecystitis improved, the SEMS was removed without replacement in eight patients, whereas it was replaced with a 7-Fr pigtail stent in four patients. Recurrence was seen in one patient(8.3%) who did not receive a replacement pigtail stent. The median follow-up period after EUS-GBD was 304 d(78-1492).CONCLUSION EUS-GBD with a SEMS is a possible alternative treatment for acute cholecystitis. Long-term outcomes after removal of the SEMS were excellent. Removal of the SEMS at 4-wk after SEMS placement and improvement of symptoms might avoid migration of the stent and recurrence of cholecystitis due to food impaction. | Ken Kamata Mamoru Takenaka Masayuki Kitano Shunsuke Omoto Takeshi Miyata Kosuke Minaga Kentaro Yamao Hajime Imai Toshiharu Sakurai Tomohiro Watanabe Naoshi Nishida Masatoshi Kudo | 2017 | World Journal of Gastroenterology2017，23，4： | 15 |
| 3 | Diagnosis of pancreatic tumors by endoscopic ultrasonography显示文摘Pancreatic tumors are highly diverse, as they can be solid or cystic, and benign or malignant. Since their imaging features overlap considerably, it is often difficult to characterize these tumors. In addition, small pancreatic tumors, especially those less than 2 cm in diameter, are difficult to detect and diagnose. For characterizing pancreatic tumors and detecting small pancreatic tumors, endoscopic ultrasonography (EUS) is the most sensitive of the imaging procedures currently available. This technique also provides good results in terms of the preoperative staging of pancreatic tumors. EUS-guided fine needle aspiration (EUS-FNA) has also proved to be a safe and useful method for tissue sampling of pancreatic tumors. Despite these advantages, however, it is still difficult to differentiate between be-nign and malignant, solid or cystic pancreatic tumors, malignant neoplasms, and chronic pancreatitis using EUS, even when EUS-FNA is performed. Recently, contrast-enhanced EUS with Doppler mode (CE-EUS) employing ultrasound contrast agents, which indicate vascularization in pancreatic lesions, has been found to be useful in the differential diagnosis of pancreatic tumors, especially small pancreatic tumors. However, Doppler ultrasonography with contrast-enhancement has several limitations, including blooming artifacts, poor spatial resolution, and low sensitivity to slow flow. Consequently, an echoendoscope was developed recently that has a broad-band transducer and an imaging mode that was designed specifically for contrastenhanced harmonic EUS (CEH-EUS) with a secondgeneration ultrasound contrast agent. The CEH-EUS technique is expected to improve the differential diagnosis of pancreatic disease in the future. This review describes the EUS appearances of common solid and cystic pancreatic masses, the diagnostic accuracy of EUS-FNA, and the relative efficacies and advantages of CE-EUS and CEH-EUS along with their relative advantages and their complementary roles in clinical practice. | Hiroki Sakamoto Masayuki Kitano Ken Kamata Muhammad El-Masry Masatoshi Kudo | 2010 | World Journal of Radiology2010，2，4： | 11 |
| 4 | Biomarkers in autoimmune pancreatitis and immunoglobulin G4-related disease显示文摘Solitary organ autoimmune disorders,formerly known as autoimmune pancreatitis(AIP),autoimmune sialadenitis,and autoimmune sclerosing cholangitis,are now considered organ-specific manifestations of systemic immunoglobulin G4-related disease(IgG4-RD).AIP and IgG4-RD are characterized by elevated serum concentration of IgG4 antibody(Ab),accumulation of IgG4-expressing plasmacytes in the affected organs,and involvement of multiple organs.It is well established that enhanced IgG4 Ab responses are a hallmark of AIP and IgG4-RD for diagnosis and monitoring disease activity.However,a significant fraction of patients with AIP and IgG4-RD who develop chronic fibroinflammatory responses have normal serum concentrations of this IgG subtype.In addition,disease flare-up is sometimes seen even in the presence of normalized serum concentrations of IgG4 Ab after successful induction of remission by prednisolone.Therefore,it is necessary to identify new biomarkers based on the understanding of the pathophysiology of AIP and IgG4-RD.Recently,we found that activation of plasmacytoid dendritic cells producing both interferon-α(IFN-α)and interleukin-33(IL-33)mediate murine AIP and human IgG4-RD.More importantly,we provided evidence that serum concentrations of IFN-αand IL-33 could be useful biomarkers for the diagnosis and monitoring of AIP and IgG4-RD activity after induction of remission in these autoimmune disorders.In this Frontier article,we have summarized and discussed biomarkers of AIP and IgG4-RD,including Igs,autoAbs,and cytokines to provide useful information not only for clinicians but also for researchers. | Akane Hara Tomohiro Watanabe Kosuke Minaga Tomoe Yoshikawa Ken Kamata Masatoshi Kudo | 2021 | World Journal of Gastroenterology2021，27，19： | 8 |
| 5 | Contrast-enhanced harmonic endoscopic ultrasonography for assessment of lymph node metastases in pancreatobiliary carcinoma显示文摘AIM: To assess the usefulness of contrast-enhanced harmonic endoscopic ultrasonography(CH-EUS) for lymph node metastasis in pancreatobiliary carcinoma.METHODS: All patients suspected of pancreatobiliary carcinoma with visible lymph nodes after standard EUS between June, 2009 and January, 2012 were enrolled.In the primary analysis, patients with successful EUSfine needle aspiration(FNA) were included. The lymph nodes were assessed by several standard EUS variables(short and long axis lengths, shape, edge characteristic and echogenicity), color Doppler EUS variable [central intranodal blood vessel(CIV) presence] and CH-EUS variable(heterogeneous/homogeneous enhancement patterns). The diagnostic accuracy relative to EUSFNA was calculated. In the second analysis, N-stage diagnostic accuracy of CH-EUS was compared with EUS-FNA in patients who underwent surgical resection.RESULTS: One hundred and nine patients(143 lymph nodes) fulfilled the criteria. The short axis cutoff ≥ 13 mm predicted malignancy with a sensitivity and specificity of 72% and 85%, respectively. These values were 72% and 63% for the long axis cut-off ≥ 20 mm, 62% and 75% for the round shape variable, 81% and 30% for the sharp edge variable, 66% and 61% for the hypoechogenicity variable, 70% and 72% for the CIV-absent variable, and 83% and 91% for the heterogeneous CH-EUS-enhancement variable, respectively. CH-EUS was more accurate than standard and color Doppler EUS, except the short axis cut-off. Notably, three patients excluded because of EUS-FNA failure were correctly N-staged by CH-EUS.CONCLUSION: CH-EUS complements standard and color Doppler EUS and EUS-FNA for assessment of lymph node metastases. | Takeshi Miyata Masayuki Kitano Shunsuke Omoto Kumpei Kadosaka Ken Kamata Hajime Imai Hiroki Sakamoto Naoshi Nisida Yogesh Harwani Takamichi Murakami Yoshifumi Takeyama Yasutaka Chiba Masatoshi Kudo | 2016 | World Journal of Gastroenterology2016，22，12： | 7 |
| 6 | Evaluation of a strawberry-harvesting robot in a field test显示文摘 | Shigehiko Hayashi Kenta Shigematsu Satoshi Yamamoto Ken Kobayashi Yasushi Kohno Junzo Kamata Mitsutaka Kurita | 2009 | Biosystems Engineering2009，，2： | 4 |
| 7 | Small invasive ductal carcinoma of the pancreas distinct from branch duct intraductal papillary mucinous neoplasm显示文摘Endoscopic ultrasonography(EUS)is a highly sensitive diagnostic method for the detection of small pancreatic carcinomas.Recently,there have been some reports describing the utility of contrast-enhanced harmonic EUS(CEH-EUS)which uses sonographic contrast agent for differentiation of a pancreatic mass.This report describes a case of small adenocarcinoma of the pancreas distinct from branch duct intraductal papillary mucinous neoplasm(IPMN)in which investigation by EUS took place every 6 mo and diagnosis was made accurately by additional CEH-EUS during the follow- up of the branch duct IPMN.A 68-year-old female was admitted to our hospital because of a branch duct IPMN in the pancreatic body.She had been followedup by EUS every 6 mo.However,after 2 years EUSdemonstrated a low echoic area distinct from the branch duct IPMN which was vaguely discernible by EUS,and accurate sizing and differential diagnosis were considered difficult on the EUS imaging.CHEUS with Sonazoid revealed a hypovascular tumor and we suspected small pancreatic carcinoma.The histopathological diagnosis was adenocarcinoma (10 mm)in the pancreatic tail,distinct from the branch duct IPMN of the pancreatic body.EUS and CEH-EUS may play an important role in the correct diagnosis of small pancreatic tumors,including synchronous and metachronous occurrence of IPMN and ductal adenocarcinoma of the pancreas. | Hiroki Sakamoto Masayuki Kitano Takamitsu Komaki Hajime Imai Ken Kamata Masatomo Kimura Yoshifumi Takeyama Masatoshi Kudo | 2009 | World Journal of Gastroenterology2009，15，43： | 2 |
| 8 | Characterization of intra-abdominal lesions of undetermined origin by contrast-enhanced harmonic EUS (with videos)显示文摘 | Yu Xia Masayuki Kitano Masatoshi Kudo Hajime Imai Ken Kamata Hiroki Sakamoto Takamitsu Komaki | 2010 | Gastrointestinal Endoscopy2010，，3： | 2 |
| 9 | Modified single transluminal gateway transcystic multiple drainage technique for a huge infected walled-off pancreatic necrosis: A case report显示文摘We report a successful endoscopic ultrasonographyguided drainage of a huge infected multilocular walledoff necrosis(WON) that was treated by a modified single transluminal gateway transcystic multiple drainage(SGTMD) technique. After placing a widecaliber fully covered metal stent, follow-up computed tomography revealed an undrained subcavity of WON. A large fistula that was created by the wide-caliber metal stent enabled the insertion of a forward-viewing upper endoscope directly into the main cavity, and the narrow connection route within the main cavity to the subcavity was identified with a direct view, leading to the successful drainage of the subcavity. This modified SGTMD technique appears to be useful for seeking connection routes between subcavities of WON in some cases. | Kosuke Minaga Masayuki Kitano Hajime Imai Kentaro Yamao Ken Kamata Takeshi Miyata Tomohiko Matsuda Shunsuke Omoto Kumpei Kadosaka Tomoe Yoshikawa Masatoshi Kudo | 2016 | World Journal of Gastroenterology2016，22，21： | 2 |
| 10 | Nucleotide-binding oligomerization domain 1 and Helicobacter pylori infection: A review显示文摘Nucleotide-binding oligomerization domain 1(NOD1) is an intracellular innate immune sensor for small molecules derived from bacterial cell components. NOD1 activation by its ligands leads to robust production of pro-inflammatory cytokines and chemokines by innate immune cells, thereby mediating mucosal host defense systems against microbes. Chronic gastric infection due to Helicobacter pylori(H. pylori) causes various upper gastrointestinal diseases, including atrophic gastritis, peptic ulcers, and gastric cancer. It is now generally accepted that detection of H. pylori by NOD1 expressed in gastric epithelial cells plays an indispensable role in mucosal host defense systems against this organism. Recent studies have revealed the molecular mechanism by which NOD1 activation caused by H. pylori infection is involved in the development of chronic gastritis and gastric cancer. In this review, we have discussed and summarized how sensing of H. pylori by NOD1 mediates the prevention of chronic gastritis and gastric cancer. | Kosuke Minaga Tomohiro Watanabe Ken Kamata Naoki Asano Masatoshi Kudo | 2018 | World Journal of Gastroenterology2018，24，16： | 1 |
| 11 | Evaluation of a strawberry-harvesting robot in a field test显示文摘 | Shigehiko Hayashi Kenta Shigematsu Satoshi Yamamoto Ken Kobayashi Yasushi Kohno Junzo Kamata Mitsutaka Kurita | 2009 | Biosystems Engineering2009，，2： | 1 |
| 12 | Estimation of malignant potential of GI stromal tumors by contrast-enhanced harmonic EUS (with videos)显示文摘 | Hiroki Sakamoto Masayuki Kitano Shigenaga Matsui Ken Kamata Takamitsu Komaki Hajime Imai Kensaku Dote Masatoshi Kudo | 2011 | Gastrointestinal Endoscopy2011，，2： | 1 |
| 13 | Characterization of intra-abdominal lesions of undetermined origin by contrast-enhanced harmonic EUS (with videos)显示文摘 | Yu Xia Masayuki Kitano Masatoshi Kudo Hajime Imai Ken Kamata Hiroki Sakamoto Takamitsu Komaki | 2010 | Gastrointestinal Endoscopy2010，，3： | 1 |
| 14 | Contrast‐enhanced harmonic endoscopic ultrasonography for pancreatobiliary diseases显示文摘 | Masayuki Kitano Ken Kamata Hajime Imai Takeshi Miyata Satoru Yasukawa Akio Yanagisawa Masatoshi Kudo | 2015 | Digestive Endoscopy2015，，： | 1 |
| 15 | Estimation of malignant potential of GI stromal tumors by contrast-enhanced harmonic EUS (with videos)显示文摘 | Hiroki Sakamoto Masayuki Kitano Shigenaga Matsui Ken Kamata Takamitsu Komaki Hajime Imai Kensaku Dote Masatoshi Kudo | 2011 | Gastrointestinal Endoscopy2011，，2： | 1 |
| 16 | Alterations of autophagic and innate immune responses by the Crohn’s disease-associated ATG16L1 mutation显示文摘Crohn’s disease(CD)is driven by the loss of tolerance to intestinal microbiota and excessive production of pro-inflammatory cytokines.These pro-inflammatory cytokines are produced by macrophages and dendritic cells(DCs)upon sensing the intestinal microbiota by the pattern recognition receptors(PRRs).Impaired activation of PRR-mediated signaling pathways is associated with chronic gastrointestinal inflammation,as shown by the fact that loss-of-function mutations in the nucleotide-binding oligomerization domain 2 gene increase the risk of CD development.Autophagy is an intracellular degradation process,during which cytoplasmic nutrients and intracellular pathogens are digested.Given that impaired reaction to intestinal microbiota alters signaling pathways mediated by PRRs,it is likely that dysfunction of the autophagic machinery is involved in the development of CD.Indeed,the loss-of-function mutation T300A in the autophagy related 16 like 1(ATG16L1)protein,a critical regulator of autophagy,increases susceptibility to CD.Recent studies have provided evidence that ATG16L1 is involved not only in autophagy,but also in PRR-mediated signaling pathways.ATG16L1 negatively regulates pro-inflammatory cytokine responses of macrophages and DCs after these cells sense the intestinal microbiota by PRRs.Here,we discuss the molecular mechanisms underlying the development of CD in the T300A ATG16L1 mutation by focusing on PRR-mediated signaling pathways. | Natsuki Okai Tomohiro Watanabe Kosuke Minaga Ken Kamata Hajime Honjo Masatoshi Kudo | 2022 | World Journal of Gastroenterology2022，28，26： | 1 |
| 17 | Evaluation of anti-migration properties of biliary covered self-expandable metal stents显示文摘AIM: To assess anti-migration potential of six biliary covered self-expandable metal stents(C-SEMSs) by using a newly designed phantom model. METHODS: In the phantom model, the stent was placed in differently sized holes in a silicone wall and retracted with a retraction robot. Resistance force to migration(RFM) was measured by a force gauge on the stent end. Radial force(RF) was measured with a RF measurement machine. Measured flare structure variables were the outer diameter, height, and taper angle of the flare(ODF, HF, and TAF, respectively). Correlations between RFM and RF or flare variables were analyzed using a linear correlated model.RESULTS: Out of the six stents, five stents were braided, the other was laser-cut. The RF and RFM of each stent were expressed as the average of five replicate measurements. For all six stents, RFM and RF decreased as the hole diameter increased. For all six stents, RFM and RF correlated strongly when the stent had not fully expanded. This correlation was not observed in the five braided stents excluding the laser cut stent. For all six stents, there was a strong correlation between RFM and TAF when the stent fully expanded. For the five braided stents, RFM after full stent expansion correlated strongly with all three stent flare structure variables(ODF, HF, and TAF). The laser-cut C-SEMS had higher RFMs than the braided C-SEMSs regardless of expansion state.CONCLUSION: RF was an important anti-migration property when the C-SEMS did not fully expand. Once fully expanded, stent flare structure variables plays an important role in anti-migration. | Kosuke Minaga Masayuki Kitano Hajime Imai Yogesh Harwani Kentaro Yamao Ken Kamata Takeshi Miyata Shunsuke Omoto Kumpei Kadosaka Toshiharu Sakurai Naoshi Nishida Masatoshi Kudo | 2016 | World Journal of Gastroenterology2016，22，30： | 1 |
| 18 | Evaluation of a strawberry-harvesting robot in a field test显示文摘 | Shigehiko Hayashi Kenta Shigematsu Satoshi Yamamoto Ken Kobayashi Yasushi Kohno Junzo Kamata Mitsutaka Kurita | 2009 | Biosystems Engineering2009，，2： | 1 |
| 19 | 在为胆汁管癌症的内视镜的胆汁的 stenting 以后的肝的动脉 pseudoaneurysm显示文摘 We report a case of a pseudoaneurysm of the right hepatic artery observed 9 mo after the endoscopic placement of a Wallstent,for bile duct stenosis,which was treated with transcatheter arterial embolization.The patient presented with obstructive jaundice and was diagnosed with inoperable common bile duct cancer.A plastic stent was inserted endoscopically to drain the bile,and chemotherapy was initiated.Abdominal pain and jaundice appeared approximately 6 mo after the beginning of chemotherapy.A diagnosis of stent occlusion and cholangitis was made,and the plastic stent was removed and substituted with a self-expandable metallic stent(SEMS) endoscopically.Nine months after SEMS insertion,contrast-enhanced computed tomography showed a pseudoaneurysm of the right hepatic artery protruding into the common bile duct lumen and in contact with the SEMS.The shape and size of the pseudoaneurysm and diameter of its neck was determined by contrast-enhanced ultrasonography using Sonazoid.A micro-catheter was led into the pseudoaneurysm in the right hepatic artery,GDC Detachable Coils were placed,and IDC Detachable Coils were then placed in the right hepatic artery on the distal and proximal sides of the pseudoaneurysm using the isolation method.There have been a few reports on pseudoaneurysm associated with stent placement in the biliary tract employing percutaneous transhepatic procedures,however,reports of pseudoaneurysms associated with endoscopic SEMS placement are very rare. | Manabu Watanabe Kazue Shiozawa Takahiko Mimura Ken Ito Itaru Kamata Yui Kishimoto Koichi Momiyama Yoshinori Igarashi Yasukiyo Sumino | 2012 | World Journal of Radiology2012，4，3： | 0 |
| 20 | Actuation and blocking force of stacked nanocarbon polymer actuators显示文摘We have developed stacked nanocarbon polymer actuators that are composed of several nanocarbon polymer actuator films using nonwoven fabric as insulation layers.The nonwoven fabric prepared through electrospinning methods has extremely-low-density structures,which do not significantly prevent the motions of each nanocarbon actuator layer.Therefore,stacking several thin nanocarbon polymer actuators using nonwoven fabric as insulation layers is expected to increase generated force without decreasing the displacement of a one-layer actuator.We have prepared stacked actuators with one,two,three,four,and seven layers using this method.The displacement and blocking force of these actuators are measured and compared with those of one-layer actuators of different thicknesses.Displacement is weakly dependent on the thickness of the actuator films of the stacked actuators.On the contrary,it decreases considerably as the thickness of the actuator film of the one-layer actuator increases.In both cases,blocking force is proportional to the thickness of actuator films.We have developed a stacked actuator model based on a trilayer actuator model and confirmed the experimental results using the model. | Ken Mukai Masahiro Yamamura Junko Kamata Hirosato Monobe Kinji Asaka | 2018 | International Journal of Smart and Nano Materials2018，9，3： | 0 |
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