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Hasegawa M, Asano Y, Endo H, Fujimoto M, Goto D, Ihn H, Inoue K, Ishikawa O, Kawaguchi Y, Kuwana M, Muro Y, Ogawa F, Sasaki T, Takahashi H, Tanaka S, Takehara K, Sato S. Investigation of prognostic factors for skin sclerosis and lung function in Japanese patients with early systemic sclerosis: a multicentre prospective observational study. Rheumatology (Oxford) 2011; 51:129-33. [DOI: 10.1093/rheumatology/ker333] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Raut V, Takaori K, Kawaguchi Y, Mizumoto M, Kawaguchi M, Koizumi M, Kodama S, Kida A, Uemoto S. Laparoscopic common hepatic artery ligation and staging followed by distal pancreatectomy with en bloc resection of celiac artery for advanced pancreatic cancer. Asian J Endosc Surg 2011; 4:199-202. [PMID: 22776310 DOI: 10.1111/j.1758-5910.2011.00105.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Adeno-carcinomas of pancreatic body are usually asymptomatic and progress to advanced stage with involvement of major arteries. Resection of advanced cancer along with en bloc resection of a common hepatic artery and celiac trunk enables a "curative" resections and only possible treatment. However, the celiac axis resection always has a risk of compromising blood supply to liver, resulting in the hepatic insufficiency. We evaluated practicability of a two-stage procedure for the advanced pancreases body cancer, laparoscopic clamping of a common hepatic artery followed by open distal pancreatectomy with en bloc celiac arterial resection to prevent the hepatic insufficiency. MATERIALS AND SURGICAL TECHNIQUE Seventy-five-year-old woman diagnosed with a 50-mm pancreatic body mass, invading splenic artery, common hepatic artery, splenic vein, and portal vein at the confluence. STAGE-1: At laparoscopy, after confirming absence of the peritoneal, superficial liver metastases and negative peritoneal cytology; we approached the common hepatic artery through the lesser sac and ligated. STAGE-2: Her liver function tests were normal after 2 weeks, and CT angiography showed complete blockage of the common hepatic artery with sufficient collateral circulation to the liver through inferior pancreatico-duodenal artery and gastro-duodenal artery. We performed an open distal pancreatectomy with en bloc resection of celiac artery. Histopathology examination confirmed R0 resection. DISCUSSION The celiac axis resection with distal pancreatectomy improves the chance of R0 resection and potentially, survival of the patient. Preoperative laparoscopic ligation of the common hepatic artery is a safe, effective, and in-expensive technique to prevent postoperative hepatic insufficiency and improves the safety of en bloc celiac artery resection with a distal pancreatectomy. Also these patients have high risk of peritoneal dissemination. Diagnostic laparoscopy is useful to detect occult metastasis, which are missed by per-operative CT scan.
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Otani K, Kawaguchi Y, Nishiyama K, Suzuki O, Nakamura S, Inaji H. Radiation-induced Organizing Pneumonia after Breast-conserving Therapy: Is Corticosteroid Necessary? Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Nakashima R, Nishiyama K, Kawaguchi Y, Suzuki O, Nakamura S, Yoshino K. Definitive Radiotherapy for Supraglottic Laryngeal Carcinoma: A Single Institutional Experience. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Kawaguchi Y, Teramoto T, Fujikawa Y, Kurogi K, Soejima M, Adachi R, Nakanishi Y, Mishiro-Sato E, Liu MC, Sakakibara Y, Suiko M, Kimura M, Kakuta Y. Crystal structure of human tyrosylprotein sulfotransferase. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311089227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Pham TAV, Ueno M, Zaitsu T, Takehara S, Shinada K, Lam PH, Kawaguchi Y. Clinical trial of oral malodor treatment in patients with periodontal diseases. J Periodontal Res 2011; 46:722-9. [DOI: 10.1111/j.1600-0765.2011.01395.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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NAKAMURA S, Kawaguchi Y, Suzuki O, Nishiyama K. 918 poster RENAL FUNCTION AFTER PREOPERATIVE CHEMORADIATION FOR T3-PANCREATIC CANCER. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)71040-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Takegawa H, Nakamura S, Miyagi K, Kawaguchi Y, Suzuki O, Nishiyama K. 818 poster AN INVESTIGATION OF SEQUENTIAL BOOST IMRT VERSUS SIB IMRT FOR HEAD AND NECK CANCER. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)70940-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zaima C, Kanai M, Ishikawa S, Kawaguchi Y, Masui T, Mori Y, Nishimura T, Matsumoto S, Yanagihara K, Chiba T, Mimori T. A case of progressive digital ischemia after early withdrawal of gemcitabine and S-1 in a patient with systemic sclerosis. Jpn J Clin Oncol 2011; 41:803-6. [PMID: 21478179 DOI: 10.1093/jjco/hyr045] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The safety of chemotherapy for patients with systemic sclerosis is unclear, and there are few published reports documenting the side effects of chemotherapy in patients with this condition. Here, we report the case of a patient with systemic sclerosis who developed severe digital ischemia during combination gemcitabine/S-1 chemotherapy for pancreatic cancer. In spite of aggressive treatment, the digital ischemia progressively worsened and gangrenous changes developed in multiple fingers and toes. In this patient, the systemic sclerosis had been well controlled, with no digital ischemic symptoms for the previous 6 years, so this progressive clinical course in spite of aggressive treatment strongly suggests that the chemotherapy triggered or aggravated the digital necrosis. To the best of our knowledge, this is only the third reported case of a patient with systemic sclerosis developing digital necrosis after gemcitabine-based chemotherapy. The incidence of digital necrosis during chemotherapy in patients with systemic sclerosis is unknown, and the mechanism by which it occurs is unclear, but the three reports published to date, including the present case, suggest that physicians should be very cautious about administering gemcitabine-based chemotherapy to patients with systemic sclerosis. Any resulting digital ischemia might be refractory to treatment and worsen progressively, even if chemotherapy is withdrawn in the early stages of digital ischemia.
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Yamamoto S, Ishihara R, Motoori M, Kawaguchi Y, Takeuchi Y, Higashino K, Uedou N, Yano M, Nakamura S, Iishi H. Comparison of definitive chemoradiotherapy and esophagectomy for stage I esophageal squamous cell carcinoma. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.4_suppl.67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
67 Background: Chemoradiotherapy (CRT) of esophageal cancer has been proposed as an alternative to esophagectomy given the favourable survival rate and mild toxicity. However, no comparative study is reported between esophagectomy and CRT in stage I esophageal squamous cell carcinoma. Methods: A total of 54 patients treated by definitive CRT and 116 patients treated by esophagectomy at out institution between February 1995 and August 2008 were included in the analysis. Overall survival and recurrence rates were evaluated. Results: Of 170 patients who had clinical stage I esophageal squamous cell carcinoma and treated by definitive CRT or esophagectomy, 169 patients (99%) were completely followed up. CRT mainly consisted of two cycles of cisplatin and fluorouracil with concurrent radiotherapy of 60 Gy in 30 fractions. Median (range) observation period was 67 (10–171) months in SURG group and 30 (4–77) months in CRT group. In CRT group grade 3 or grade 4 hematological or non-hematological adverse effects were seen in 24 (44.4%) patients. 1-year and 3-year overall survival rates were 97.4% and 85.5% in the SURG group and 98.1% and 88.7% in the CRT group (P = 0.78). By using Cox proportional hazards modelling, overall survival was comparable between the 2 groups after adjusting for age, sex, and size of cancer. Hazard ratio of CRT for overall survival was 0.95 (95% CI: 0.37-2.47). The incidence or local recurrence including metachronous esophageal cancer was significantly higher in the CRT group than the SURG group (P < 0.0001). All recurrences were intramucosal carcinomas and all of them were cured after the salvage treatment mainly using endoscopy. Conclusions: Overall survival rate of CRT was comparable with esophagectomy despite high local recurrence rate. Local recurrent carcinoma is endoscopically treatable in all patients without influence on overall survival. CRT appears to be a reasonable alternative to esophagectomy in patients with stage I esophageal cancer. No significant financial relationships to disclose.
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Gono T, Kawaguchi Y, Kaneko H, Nishimura K, Hanaoka M, Kataoka S, Okamoto Y, Katsumata Y, Yamanaka H. Anti-NR2A antibody as a predictor for neuropsychiatric systemic lupus erythematosus. Rheumatology (Oxford) 2011; 50:1578-85. [DOI: 10.1093/rheumatology/keq408] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Kawaguchi Y, Nakamura S, Miyagi K, Nakajima A, Suzuki O, Nishiyama K. Patterns of Failure in Patients with Clinical Stage IA Thoracic Esophageal Cancer treated with Definitive Radiotherapy Using Localized Field. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Watanabe M, Kono K, Kawaguchi Y, Mizukami Y, Mimura K, Maruyama T, Izawa S, Fujii H. NK cell dysfunction with down-regulated CD16 and up-regulated CD56 molecules in patients with esophageal squamous cell carcinoma. Dis Esophagus 2010; 23:675-81. [PMID: 20545975 DOI: 10.1111/j.1442-2050.2010.01073.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
NK cells can be divided into two subsets, CD56(dim) and CD56(bright) NK cells, based on their expression of CD56 and CD16. In the present study, we analyzed NK cell dysfunction in patients with esophageal squamous cell carcinoma (ESCC), with a particular focus on the expression of CD16 and CD56 molecules. Expression of CD16 and CD56, and the distribution of CD56(dim) or CD56(bright) NK cells gated on CD56(+)CD3(-) NK cells were compared between ESCC patients (n= 40) and healthy donors (n= 38). Purified NK cells were evaluated for Cetuximab-mediated antibody-dependent cellular cytotoxicity (ADCC) against epidermal growth factor receptor (EGFR)-expressing ESCC cell lines. Although there were no significant differences in the distribution of CD56(dim) and CD56(bright) NK cells between ESCC patients and healthy donors, down-regulated CD16 and up-regulated CD56 were significantly observed on NK cells of ESCC patients, paralleling the impairment of Cetuximab-mediated ADCC, in comparison with healthy donors. After patients received curative resections of ESCC, the down-regulated CD16 and up-regulated CD56 were significantly restored to the levels of healthy donors. Moreover, TGF-beta1 partially contributed to down-regulation of CD16 on NK cells. Down-regulated CD16 and up-regulated CD56 molecules on NK cells were observed in ESCC patients, resulting in NK cell dysfunction.
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Miyagi K, Nakajima A, Kawaguchi Y, Suzuki O, Nakamura S, Nishiyama K. Radiotherapy for the Second Lung Mass after Surgical Resection of the First Lung Cancer. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Nakazawa T, Kondo T, Niu D, Ma D, Mochizuki K, Kawasaki T, Kawaguchi Y, Kono K, Fujii H, Katoh R. Giant oesophageal liposarcoma mimicking spindle cell liposarcoma and containing eosinophilic cells with rhabdomyoblastic differentiation. J Clin Pathol 2010; 63:469. [PMID: 20418237 DOI: 10.1136/jcp.2010.075523] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Maruyama T, Mimura K, Sato E, Watanabe M, Mizukami Y, Kawaguchi Y, Ando T, Kinouchi H, Fujii H, Kono K. Inverse correlation of HER2 with MHC class I expression on oesophageal squamous cell carcinoma. Br J Cancer 2010; 103:552-9. [PMID: 20628381 PMCID: PMC2939777 DOI: 10.1038/sj.bjc.6605772] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND As HER2 is expressed in 30% of oesophageal squamous cell carcinomas (ESCCs), T-cell-based immunotherapy and monoclonal antibodies targeted against HER2 are attractive, novel approaches for ESCCs. However, it was shown that there is an inverse correlation between HER2 and MHC class I expression on tumours. Thus, the correlation between HER2 and MHC class I expressions on ESCC was evaluated. METHODS Expressions of MHC class I and HER2 in ESCC tissues (n=80) and cell lines were assessed by immunohistochemistry, fluorescence in situ hybridisation (FISH), and flow cytometry. We investigated whether HER2 downregulation with small interfering RNA (siRNA) in ESCC cell lines could upregulate the expression of MHC class I and the antigen presentation machinery components, and could increase their sensitivity for tumour antigen-specific CTLs. RESULTS There was an inverse correlation between HER2 and MHC class I expressions in both tumour tissues and cell lines. Downregulation of HER2 with siRNA resulted in the upregulation of MHC class I expression, leading to increased CTL recognition by tumour antigen-specific CTLs. CONCLUSION HER2-overexpressing ESCC tumour cells showed a reduced sensitivity for CTLs through the downregulation of MHC class I.
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Maruyama T, Kono K, Izawa S, Mizukami Y, Kawaguchi Y, Mimura K, Watanabe M, Fujii H. CCL17 and CCL22 chemokines within tumor microenvironment are related to infiltration of regulatory T cells in esophageal squamous cell carcinoma. Dis Esophagus 2010; 23:422-9. [PMID: 20002703 DOI: 10.1111/j.1442-2050.2009.01029.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
It has been reported that an increased population of regulatory T cells (T-regs) is one of the reasons for impaired anti-tumor immunity. We investigated the frequency of Foxp3(+) T-regs in tumor-infiltrating lymphocytes (TILs) and peripheral blood lymphocytes (PBLs) of patients with esophageal squamous cell carcinoma (ESCC). Furthermore, in order to elucidate the mechanisms behind T-regs accumulation within tumors, we evaluated the relationship between CCL17 or CCL22 expression and the frequency of Foxp3(+) T-regs. CD4(+)CD25(+)Foxp3(+) T-regs as a percentage of CD4(+) cells were counted by flow cytometry. The frequency of CCL17(+) or CCL22(+) cells among CD14(+) cells in tumors was also evaluated by flow cytometry. Moreover, an in vitro migration assay using T-regs derived from ESCC was performed in the presence of CCL17 or CCL22. The frequency of Foxp3(+) T-regs in TILs was significantly higher than that in the normal esophageal mucosa (24.6 +/- 10.0 vs 7.1 +/- 5.9%, P < 0.01). The frequency of Foxp3(+) T-regs in PBLs of ESCC patients was significantly higher than that in normal healthy donors (7.0 +/- 4.2 vs 2.5 +/- 1.0%, P < 0.01). Furthermore, the frequency of CCL17(+) or CCL22(+) cells among CD14(+) cells within tumors was significantly higher than that of normal esophageal mucosa, and there was a significant correlation between the frequency of CCL17(+) or CCL22(+) cells and Foxp3(+) T-regs in TILs. In addition, the in vitro migration assay indicated that T-regs were significantly induced to migrate by CCL17 or CCL22. In conclusion, CCL17 and CCL22 within the tumor are related to the increased population of Foxp3(+) T-regs in ESCC.
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Morimoto M, Nishiyama K, Nakamura S, Suzuki O, Kawaguchi Y, Nakajima A, Imai A, Ishihara R, Uemura H, Fujii T, Yoshino K, Tomita Y. Significance of Endoscopic Screening and Endoscopic Resection for Esophageal Cancer in Patients with Hypopharyngeal Cancer. Jpn J Clin Oncol 2010; 40:938-43. [DOI: 10.1093/jjco/hyq068] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Egawa H, Ozawa K, Takada Y, Teramukai S, Mori A, Ogawa K, Kaido T, Fujimoto Y, Kawaguchi Y, Hatano E, Sato H, Ono M, Takai K, Tanaka K, Uemoto S. Coupled regulation of interleukin-12 receptor beta-1 of CD8+ central memory and CCR7-negative memory T cells in an early alloimmunity in liver transplant recipients. Clin Exp Immunol 2010; 160:420-30. [PMID: 20345976 DOI: 10.1111/j.1365-2249.2010.04117.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
This study investigated how CD8(+) T cell subsets respond to allo- and infectious immunity after living donor liver transplantation (LDLT). Early alloimmunity: 56 recipients were classified into three types according to the post-transplant course; type I demonstrated uneventful post-transplant course, type II developed severe sepsis leading to multiple organ dysfunction syndrome or retransplantation and type III with acute rejection. In 23 type I recipients, the interleukin (IL)-12 receptor beta-1 (R beta 1)(+) cells of central memory T cells (Il-12R beta 1(+) T(CM)) were increased above the pretransplant level. In 16 type II recipients, IL-12R beta 1(+) T(CM) was decreased markedly below the pretransplant level on postoperative day (POD) 5. In 17 type III recipients, IL-12R beta 1(+) T(CM) was decreased for a more prolonged period until POD 10. Along with down-regulation of IL-12R beta 1(+) T(CM), the IL-12R beta 1(+) cells of CCR7-negative subsets (CNS) as well as perforin, interferon (IFN)-gamma and tumour necrosis factor (TNF)-alpha decreased gradually, resulting in the down-regulation of effectors and cytotoxicity. The down-regulation of IL-12R beta 1(+) T(CM) was suggested to be due to the recruitment of alloantigen-primed T cells into the graft, and then their entry into the secondary lymphoid organ, resulting in graft destruction. Infectious immunity: immunocompetent memory T cells with the capacity to enhance effectors and cytotoxicity were generated in response to post-transplant infection along with both up-regulation of the IL-12R beta 1(+) T(CM) and an increase in the CNS showing the highest level of IL-12R beta 1(+) cells. In conclusion, this work demonstrated that the IL-12R beta 1(+) cells of T(CM) and CNS are regulated in a tightly coupled manner and that expression levels of IL-12R beta 1(+) T(CM) play a crucial role in controlling allo- and infectious immunity.
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Hirata M, Takao S, Okamoto Y, Yamashita S, Kawaguchi Y, Takami M, Furusawa H, Abe C, Sakamoto J, Yoshimoto M. 472 A phase II trial of oral combination chemotherapy with capecitabine and cyclophosphamide (XC) in metastatic breast cancer. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70493-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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121
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Kanai M, Matsumoto S, Nishimura T, Matsumura Y, Hatano E, Mori A, Masui T, Kawaguchi Y, Nakamura E, Tada S, Kitano T, Ishiguro H, Yanagihara K, Chiba T. Premedication with 20 mg dexamethasone effectively prevents relapse of extensive skin rash associated with gemcitabine monotherapy. Ann Oncol 2010; 21:189-90. [PMID: 19889615 DOI: 10.1093/annonc/mdp513] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Sugiura N, Baba Y, Kawaguchi Y, Iwatani T, Suzuki K, Kusakabe T, Yamagishi K, Kimata K, Kakuta Y, Watanabe H. Glucuronyltransferase activity of KfiC from Escherichia coli strain K5 requires association of KfiA: KfiC and KfiA are essential enzymes for production of K5 polysaccharide, N-acetylheparosan. J Biol Chem 2009; 285:1597-606. [PMID: 19915003 DOI: 10.1074/jbc.m109.023002] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Heparan sulfate is a ubiquitous glycosaminoglycan in the extracellular matrix of most animals. It interacts with various molecules and exhibits important biological functions. K5 antigen produced by Escherichia coli strain K5 is a linear polysaccharide N-acetylheparosan consisting of GlcUA beta1-4 and GlcNAc alpha1-4 repeating disaccharide, which forms the backbone of heparan sulfate. Region 2, located in the center of the K5-specific gene cluster, encodes four proteins, KfiA, KfiB, KfiC, and KfiD, for the biosynthesis of the K5 polysaccharide. Here, we expressed and purified the recombinant KfiA and KfiC proteins and then characterized these enzymes. Whereas the recombinant KfiC alone exhibited no GlcUA transferase activity, it did exhibit GlcUA transferase and polymerization activities in the presence of KfiA. In contrast, KfiA had GlcNAc transferase activity itself, which was unaffected by the presence of KfiC. The GlcNAc and GlcUA transferase activities were analyzed with various truncated and point mutants of KfiA and KfiC. The point mutants replacing aspartic acid of a DXD motif and lysine and glutamic acid of an ionic amino acid cluster, and the truncated mutants deleting the C-terminal and N-terminal sites, revealed the essential regions for GlcNAc and GlcUA transferase activity of KfiC and KfiA, respectively. The interaction of KfiC with KfiA is necessary for the GlcUA transferase activity of KfiC but not for the enzyme activity of KfiA. Together, these results indicate that the complex of KfiA and KfiC has polymerase activity to synthesize N-acetylheparosan, providing a useful tool toward bioengineering of defined heparan sulfate chains.
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Imai H, Egawa H, Kajiwara M, Nakajima A, Ogura Y, Hatano E, Ueda M, Kawaguchi Y, Kaido T, Takada Y, Uemoto S. Resolution of Preoperative Portal Vein Thrombosis After Administration of Antithrombin III in Living Donor Liver Transplantation: Case Report. Transplant Proc 2009; 41:3931-3. [DOI: 10.1016/j.transproceed.2008.10.104] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2008] [Accepted: 10/06/2008] [Indexed: 01/19/2023]
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Yanagisawa T, Ueno M, Shinada K, Ohara S, Wright FAC, Kawaguchi Y. Relationship of smoking and smoking cessation with oral health status in Japanese men. J Periodontal Res 2009; 45:277-83. [PMID: 19744265 DOI: 10.1111/j.1600-0765.2009.01233.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND OBJECTIVE Smoking has been associated with the number of natural teeth a person has and with the likelihood of periodontitis. The purpose of this study was to determine the relationships between the number of teeth present and periodontal diseases with smoking habits in a cohort of Japanese men. MATERIAL AND METHODS The study group comprised 1088 men, 40-75 years of age. Oral examinations were conducted in dental clinics. Information on smoking status and on oral health behavior was collected from self-administered questionnaires. The relationship between oral health status and smoking status was estimated using adjusted odds ratios. RESULTS Compared with those whom had never smoked, the odds ratios of having more than eight missing teeth and having periodontitis, among current smokers, were 1.67 and 1.74, respectively. In those who had stopped smoking for 11 years or longer, there was no increase in the odds ratio of having more than eight missing teeth and periodontitis, compared with those whom had never smoked. CONCLUSION Smoking has a positive association with missing teeth and periodontitis. However, smoking cessation is beneficial for oral health. The odds of having more than eight missing teeth, or of having periodontitis, in those who had never smoked was similar to that of individuals who reported that they had stopped smoking for 11 years or more.
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Hirasawa K, Jun HS, Maeda K, Kawaguchi Y, Itagaki S, Mikami T, Baek HS, Doi K, Yoon JW. Role of macrophage-derived cytokines and oxygen free radicals in the pathogenesis of encephalomyocarditis virus-induced diabetes in mice. Exp Clin Endocrinol Diabetes 2009. [DOI: 10.1055/s-0029-1211818] [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: 10/20/2022]
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