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Cetuximab and panitumumab in a patient with colon cancer and concomitant chronic skin disease:A potential beneficial effect on psoriasis vulgaris

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World Journal of Gastroenterology 2015年第12期21卷 3746-3749页

作者： ken okamoto Hiromichi Maeda Takeo Shiga Mai Shiga ken Dabanaka Kazuhiro Hanazaki Michiya Kobayashi Department of Human Health and Medical Sciences Kochi Medical School Hospital Cancer Treatment Center Kochi Medical School Hospital Department of Dermatology Kochi Medical School Department of Surgery Kochi Medical School

Monoclonal antibodies against epidermal growth factor receptor(EGFR) are used in the treatment of advanced colorectal cancer. However, these agents can induce severe dermatological side effects that discourage their administration in patients with chronic dermatological disease. EGFR plays a key role in normal skin development and immunological function, and is expressed in various tissues and organs, although contrarily, it is overexpressed in psoriasis-related skin lesions. Thus, discussion is ongoing regarding the putative pathological role and therapeutic potential of this protein. We herein report on a patient with advanced colon cancer and concomitant long-standing psoriasis vulgaris who received antiEGFR antibody monotherapy as a third-line treatment for metastatic disease. One week after the initiation of treatment, the patient's skin lesions dramatically subsided and the improvement was sustained during therapy. Based on this case, we propose that anti-EGFR antibody therapy is not necessarily contraindicated in patients with psoriasis vulgaris. Moreover, the findings reaffirmed that EGFR is an important molecule in the pathology of psoriasis.

关键词： Psoriasis Cetuximab Panitumumab Epidermal growth f

Pharmacokinetic study of paclitaxel in malignant ascites from advanced gastric cancer patients

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World Journal of Gastroenterology 2006年第9期12卷 1412-1415页

作者： Michiya Kobayashi Junichi Sakamoto Tsutomu Namikawa ken okamoto Takehiro Okabayashi kengo Ichikawa Keijiro Araki Department of Tumor Surgery Kochi Medical School KohasuOko-choNankoku 783-8505Japan Department of Epidemiological & Clinical Research Information Management Kyoto University Graduate School of Medicine Yoshida Hon-machiSakyo-ku 606-8317Japan Department of Tumor Surgery Kochi Medical School Kohasu Oko-cho Nankoku 783-8505 Japan

AIM： To examine the paclitaxel concentrations in plasma and ascites after its intravenous administration in patients with ascites due to peritonitis carcinomatosa resulting from advanced gastric cancer. METHODS： Two patients with ascites due to peritonitis carcinomatosa resulting from gastric cancer were included in this study. The paclitaxel concentrations in plasma and ascites were investigated for 72 h in case 1 and 168 h in case 2 after intravenous administration. RESULTS： The paclitaxel concentration in plasma peaked immediately after administration, followed by rapid decrease below the threshold value of 0.1 μmol （85 ng/mL） within 24 h. In contrast, the paclitaxel concentration in ascites increased gradually for 24 h after administration to a level consistent with the level found in plasma. After 24 h the level of paclitaxel in ascites and plasma became similar, with the optimal level being maintained up to 72 h following administration. CONCLUSION： The concentration of paclitaxel in ascites is maintained within the optimal level for the treatment of cancer cells for up to 72 h after intravenous administration. Paclitaxel is a promising drug for the treatment of malignant ascites of gastric cancer.

关键词： Paclitaxel Chemotherapy Gastric cancer Peritoneal carcinomatosis Pharmacokinetic study Ascites

Nodular fasciitis in the mesentery, a differential diagnosis of peritoneal carcinomatosis

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World Journal of Gastroenterology 2014年第5期20卷 1361-1364页

作者： Mai Shiga ken okamoto Manabu Matsumoto Hiromichi Maeda ken Dabanaka Tsutomu Namikawa Sunao Uemura Masaya Munekage Michiya Kobayashi Kazuhiro Hanazaki Department of Surgery Kochi Medical School Cancer Treatment Center Kochi Medical School Laboratory of Diagnostic Pathology Kochi Medical School Hospital

Nodular fasciitis is a benign proliferative lesion composed of fibroblast-like cells that affects various sites in the *** describe a patient with nodular fasciitis in the mesentery,encountered during laparotomy for the treatment of ascending colon *** nodular fasciitis in our patient resembled peritoneal dissemination of malignancy on macroscopic *** the treatment options change with concomitant peritoneal dissemination of gastrointestinal tract malignancy,recognition of this rare condition and preparation for unexpected nodular lesions are crucial.

关键词： Colon cancer Digestive system cancer Laparoscopic surgery Soft tissue neoplasms Neoplasm metastasis Immunohistochemistry

Benefits of early postoperative jejunal feeding in patients undergoing duodenohemipancreatectomy

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World Journal of Gastroenterology 2006年第1期12卷 89-93页

作者： Takehiro Okabayashi Michiya Kobayashi Isao Nishimori Tekeki Sugimoto Toyokazu Akimori Tsutomu Namikawa ken okamoto Saburo Onishi Keijiro Araki Department of Tumor Surgery Kochi Medical SchoolNankokuKochi 783-8505Japan Department of Gastroenterology and Hepatology Kochi Medical SchoolNankokuKochi 783-8505Japan

AIM： To study whether early postoperative enteral nutrition reduces the incidence of complications and/or improves nutritional status following duodenohernipancre atectomy （DHP）. METHODS： We studied 39 patients who underwent DHP for a peri-ampullary mass. Twenty-three patients received total parental nutrition and then started to have an oral intake of nutrition between postoperative day （POD） 7 and 14 [late postoperative enteral nutrition （LPEN） group]. Sixteen patients started to have enteral feeding through a jejunostomy catheter the day after the operation [early postoperative enteral nutrition （EPEN） group]. The incidence of complications and laboratory data at the early postoperative stage were studied in comparison between LPEN and EPEN groups. RESULTS： Serum levels of albumin and total protein in the EPEN group were significantly higher than those in the LPEN group. The loss of body mass index was significantly suppressed in the EPEN group as compared to the LPEN group. The lymphocyte count decreased immediately after the operation was restored significantly faster in the EPEN group than in the LPEN group. The EPEN group showed significantly fewer incidences of postoperative pancreatic fistulas, as well as a significantly shorter length of hospitalization than the LPEN group. There were no significant differences in the incidences of other postoperative complications between the two groups, such as delayed gastric emptying, surgical site infection, cholangitis, and small bowel ***： EPEN is a safe and beneficiaopportunity for patients who have undergone DHP for a peri-ampullary mass.

关键词： Nutrition Postoperative jejunal feeding Pancreaticoduodenectomy Enteral nutrition

Is there diversity among UGT1A1 polymorphism in Japan?

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World Journal of Gastrointestinal Oncology 2012年第7期4卷 170-175页

作者： Michiya Kobayashi Shoichi Hazama kenichi Takahashi Koji Oba Naoko Okayama Mitsuaki Nishioka Yuji Hinoda Masaaki Oka ken okamoto Hiromichi Maeda Daisuke Nakamura Junichi Sakamoto Hideyuki Mishima Department of Human Health and Medical Sciences Kochi Medical School Nankoku 783-8505 Japan Department of Digestive Surgery and Surgical Oncology (Surgery Ⅱ) Yamaguchi University Graduate School of Medicine Ube Yamaguchi 755-8505 Japan Department of Surgery Aomori Prefectural Central Hospital Aomori 030-8553 Japan Translational Research and Clinical Trial Center Hok-kaido University Hospital Sapporo 060-8638 Japan Division of Laboratory Yamaguchi University Hospital Ube Yamaguchi 755-8505 Japan Department of Oncology and Laboratory Medicine Yamaguchi University Graduate School of Medicine Ube Yama-guchi 755-8505 Japan Tokai University School of Medicine Is-ehara Kanagawa 259-1131 Japan Young Leaders Program in Healthcare Administration Nagoya University Graduate School of Medicine Nagoya 466-8550 Japan Department of Surgery Osaka National Hos-pital Osaka 565-0871 Japan

AIM: To investigate into the diversity of UGT1A1 polymorphism across three different districts in Japan and highlight genetic differences among the population in Japan. METHODS: We enrolled 50 healthy volunteers from each of the Yamaguchi (western part of Japan), Kochi(southern part of Japan) and Akita (northern part of Japan) prefectures. Blood samples (7 mL) were collected from each participant and stored in EDTA for subsequent genotyping by fragment size analysis, direct sequencing and TaqMan assay of UGT1A1*28, UGT1A7*3/UGT1A9*22 and UGT1A1*93/UGT1A1*6/ UGT1A1*27/UGT1A1*60/UGT1A7 (-57), respectively. RESULTS: The only statistically significant differences in allele polymorphisms among the group examined were for UGT1A1*6. The Akita population showed more UGT1A1*6 heterozygosity (P = 0.0496). CONCLUSION: Our study revealed no regional diversity among UGT1A1, UGT1A7 or UGT1A9 polymorphisms in Japan.

关键词： UGT1A1 gene Polymorphism Diversity

Adult intussusception with cecal adenocarcinoma:Successful treatment by laparoscopy-assisted surgery following preoperative reduction

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World Journal of Gastrointestinal Surgery 2012年第5期4卷 131-134页

作者： Tsutomu Namikawa ken okamoto Takehiro Okabayashi Masamitsu Kumon Michiya Kobayashi Kazuhiro Hanazaki Department of Surgery Kochi Medical SchoolKohasuOkochoNankokuKochi 783-8505Japan Department of Human Health and Medical Sciences Kochi Medical SchoolKohasuOkochoNankokuKochi 783-8505Japan Department of Surgery Noichi Central HospitalNoichiKochi 781-5213Japan

We report a case of adult intussusception caused by cecal adenocarcinoma that was treated by laparoscopyassisted ileocecal resection following reduction by contrast enema and preoperative colonoscopy.A 68-yearold male with cecal cancer was admitted to our hospital because of colicky abdominal pain after taking a *** abdomen was distended,and a mass was palpable in the right upper quadrant,which appeared as a target-or sausage-shaped lesion by ultrasonograhpy and computed tomography.A contrast enema using water-soluble material showed a cup-shaped filling defect characterized by intussusception in the ascending *** round defect with a clear margin was pushed gradually back into the cecum by the enema ***-occurrence of the intussusception is easilyreleased by *** performed laparoscopyassisted ileocecal resection of a protruding tumor measuring 6.5 cm × 5.0 cm × 3.5 cm from the cecum,with D3 lymph node *** examination revealed a well-differentiated adenocarcinoma that had invaded the serosa without permeating the lymphatic or venous capillaries,as well as lymph node *** postoperative course was uneventful,and the patient has been well without evidence of disease recurrence for 5 years following the *** reduction of adult colonic intussusception before surgical resection is therefore an option in cases of an early and correct diagnosis of intussusception.

关键词： Adult intussusception Cecal cancer Enema reduction Colonoscopy Laparoscopy-assisted surgery

New aspects of a small GTPase RAB35 in brain development and function

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Neural Regeneration Research 2025年第7期20卷 1971-1980页

作者： Ikuko Maejima ken Sato Laboratory of Molecular Traffic Institute for Molecular and Cellular RegulationGunma UniversityMaebashiJapan

In eukaryotic cells,organelles in the secretory,lysosomal,and endocytic pathways actively exchange biological materials with each other through intracellular membrane trafficking,which is the process of transporting the cargo of proteins,lipids,and other molecules to appropriate compartments via transport vesicles or *** processes are strictly regulated by various small GTPases such as the RAS-like in rat brain(RAB)protein family,which is the largest subfamily of the RAS *** of membrane trafficking affects tissue homeostasis and leads to a wide range of diseases,including neurological disorders and neurodegenerative ***,it is important to understand the physiological and pathological roles of RAB proteins in brain ***35,a member of the RAB family,is an evolutionarily conserved protein in metazoans.A wide range of studies using cultured mammalian cells and model organisms have revealed that RAB35 mediates various processes such as cytokinesis,endocytic recycling,actin bundling,and cell ***35 is also involved in neurite outgrowth and turnover of synaptic *** generated brain-specific Rab35 knockout mice to study the physiological roles of RAB35 in brain development and *** mice exhibited defects in anxiety-related behaviors and spatial ***,RAB35 is required for the precise positioning of pyramidal neurons during hippocampal development,and thereby for normal hippocampal *** contrast,layer formation in the cerebral cortex occurred superficially,even in the absence of RAB35,suggesting a predominant role for RAB35 in hippocampal development rather than in cerebral cortex *** studies have suggested an association between RAB35 and neurodegenerative diseases,including Parkinson's disease and Alzheimer's *** this review,we provide an overview of the current understanding of subcellular functions of *** also provide insights into the phys

关键词： endocytosis endosomes hippocampal development neurodegenerative diseases RAB35

Exploring the novel role of oligodendrocyte precursor cells in phagocytosis:beyond myelinogenesis

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Neural Regeneration Research 2025年第2期20卷 473-474页

作者： Gen Hamanaka ken Arai Neuroprotection Research Laboratories Departments of Radiology and NeurologyMassachusetts General Hospital and Harvard Medical SchoolCharlestownMAUSA

Roles of oligodendrocyte precursor cells in the central nervous system:Oligodendrocyte precursor cells(OPCs)have long been recognized for their critical role as precursors to oligodendrocytes,the primary myelin-producing *** precursors,OPCs mature and differentiate into oligodendrocytes,which contribute significantly to the formation of myelin sheaths around *** myelination,which is critical for the conduction of salutatory nerve impulses in the cerebral white matter,underscores the classical role of oligodendrocytes in central nervous system(CNS)***,because oligodendrocytes are differentiated cells that cannot proliferate.

关键词： critical system conduction

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新型高速棒线轧机传动与控制系统

新型高速棒线轧机传动与控制系统