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Maekawa N, Yokoi H, Sotome K, Matsuura K, Tanaka C, Endo N, Nakagiri A, Ushijima S. Athelia termitophila sp. nov. is the teleomorph of the termite ball fungus Fibularhizoctonia sp. MYCOSCIENCE 2020. [DOI: 10.1016/j.myc.2020.08.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abe T, Kitayuguchi J, Okuyama K, Okada S, Nabika T, Tanaka C. Environmental factors and physical activity among youth in rural Japan: a 1-year prospective study. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Although moderate-to-vigorous physical activity (MVPA) has multiple health benefits, current global activity levels among children are quite low. Environmental influences on MVPA levels among children and adolescents in rural areas are unclear. The present study examined if environmental factors were associated with MVPA in children and adolescents in rural Japan.
Methods
Two school-based serial surveys were conducted in 2017 and 2018 for 1,461 children and adolescents (10-14 years old) in Unnan City, Japan. If meeting the WHO recommended MVPA levels: at least 60 minutes/day was assessed via the Japanese translation of the WHO Health Behaviour in School-aged Children survey questionnaire. Environmental factors, namely habitable land area, population size, and population density were calculated for each individuals' residential town, and categorized into three levels (small, medium, and large). Logistic regression was used to determine odds ratios (OR) and 95% confidence intervals (CI) of engaging in the recommended level of MVPA after 1 year by each environmental factor, adjusting for sex, school grades, body mass index, screen time, preference for PA, and MVPA level at baseline.
Results
Only 22.4% of children and adolescents were engaging in the recommended MVPA levels in 2018. Engaging in the recommended level of MVPA after 1 year was significantly associated with medium (OR = 1.63; 95%CI, 1.08-2.46) and large (OR = 1.69; 95%CI, 1.15-2.47) compared to small habitable areas, and with medium (OR = 1.01; 95%CI, 0.61-1.67) and large (OR = 1.75; 95%CI, 1.09-2.81) compared to small population size. Population density was not associated with MVPA.
Conclusions
This prospective study found that habitable area and population size were positively associated with MVPA at 1-year follow-up in rural Japan. In rural areas, habitable land areas and population size itself may be a better predictor for MVPA among children than population density.
Key messages
Habitable area and population size was positively associated with physical activity among children and adolescents in rural Japan. Population density as an environmental factor was not associated with physical activity.
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Ando Y, Hayashi T, Shiouchi H, Tanaka C, Ito K, Nishibe S, Miyata N, Horiba R, Yanagi H, Fujii T, Kawada K, Ikeda Y, Yamada S. Effect of Obesity on Hematotoxicity Induced by Carboplatin and Paclitaxel Combination Therapy in Patients with Gynecological Cancer. Biol Pharm Bull 2020; 43:669-674. [PMID: 32037352 DOI: 10.1248/bpb.b19-00916] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Despite in vivo studies suggesting that obesity increases carboplatin (CBDCA) bone marrow toxicity, the American Society of Clinical Oncology recommends that full weight-based cytotoxic chemotherapy doses be used to treat obese patients with cancer. Accordingly, the present study retrospectively investigated the effect of body mass index (BMI) on bone marrow toxicity in patients with gynecological cancer who underwent paclitaxel and carboplatin (TC) therapy after eliminating the effect of the target area under the curve (AUC). Risk factors for CBDCA bone marrow toxicity were also identified. A total of 110 patients with primary gynecological cancer or gynecological cancer of unknown primary origin who underwent TC therapy with a target AUC of 5-6 were included herein. Patients with a BMI of ≥25 and <25 kg/m2 were assigned to the obesity and control groups, respectively, and evaluated according to changes in hematological test values (platelet, white blood cell, and hemoglobin counts) starting from initial TC therapy administration until 21 d after the second treatment course. The obesity group had a significantly higher thrombocytopenia rate than the control group. Risk factors for thrombocytopenia ≥ grade 2 included BMI ≥25 kg/m2. Among patients with primary gynecological cancer or gynecological cancer of unknown primary origin who had a BMI of ≥25 kg/m2, those receiving CBDCA may be at increased risk for thrombocytopenia ≥ grade 2 when the dosage is calculated using the Calvert formula with the creatinine clearance level.
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Miwa N, Tanaka C, Ishida S, Hirata G, Song J, Torigoe T, Kuninobu Y, Nishikata T. Copper-Catalyzed Tertiary Alkylative Cyanation for the Synthesis of Cyanated Peptide Building Blocks. J Am Chem Soc 2020; 142:1692-1697. [PMID: 31939289 DOI: 10.1021/jacs.9b11349] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In this paper, we report efficient cyanation of various peptides containing the α-bromocarbonyl moiety using a Cu-catalyzed radical-based methodology employing zinc cyanide as the cyanide source. Mechanistic studies revealed that in situ formed CuCN was a key intermediate during the catalytic cycle. Our method could be useful for the synthesis of modified peptides containing quaternary carbons.
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Takenaka D, Ohno Y, Tanaka C, Matsushiro E, Higashida A, Hashimoto T, Maeda H, Sakamoto S, Satouchi M. EP1.01-50 Quantitative Assessment of Subsegmental Bronchi on Thin-Section CT for Pulmonary Lymphangitis Carcinomatosa. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2023] [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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Nakamura N, Tanaka C, Takeuchi-Kaneko Y. Recombination and local population structure of the root endophytic fungus Glutinomyces brunneus based on microsatellite analyses. FUNGAL ECOL 2019. [DOI: 10.1016/j.funeco.2019.03.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sato B, Kanda M, Ito S, Teramoto H, Mochizuki Y, Ishigure K, Murai T, Asada T, Ishiyama A, Matsushita H, Tanaka C, Kobayashi D, Fujiwara M, Kodera Y. Proposal of optimal cut-off of preoperative serum tumor marker levels to predict postoperative recurrences of gastric cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.173] [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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Oda T, Tanaka C, Tsuda M. Amanita imazekii—a new species in Amanita section Caesareae. Mycologia 2019. [DOI: 10.1080/00275514.2001.12063257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kitade Y, Sumita T, Izumitsu K, Tanaka C. Cla4 PAK-like kinase is required for pathogenesis, asexual/sexual development and polarized growth in Bipolaris maydis. Curr Genet 2019; 65:1229-1242. [DOI: 10.1007/s00294-019-00977-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/10/2019] [Accepted: 04/16/2019] [Indexed: 12/23/2022]
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Nagata N, Maeda H, Ishibashi K, Hirata K, Makiyama A, Iwamoto S, Takemoto H, Imasato M, Yoshida Y, Munemoto Y, Tanaka C, Morita Y, Hotta Y, Toyofuku A, Nagasaka T, Morita S, Sakamoto J, Mishima H. Multicenter open-label randomized phase II study of second-line panitumumab and irinotecan with or without fluoropyrimidines in patients with KRAS wild-type metastatic colorectal cancer (PACIFIC study). Med Oncol 2019; 36:46. [PMID: 31020480 DOI: 10.1007/s12032-019-1254-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 02/11/2019] [Indexed: 12/29/2022]
Abstract
This phase II clinical trial compared the efficacy and safety of second-line irinotecan and panitumumab treatment (IRI + Pmab) with that of irinotecan, fluoropyrimidines and panitumumab treatment (control) in patients with KRAS wild-type mCRC. The primary endpoint was progression-free survival. In addition, early predictive markers of treatment efficacy were explored. Eighty patients were planned to be recruited. Due to a slow accrual rate, only 48 patients were recruited from 2012 to 2016, of which 23 were allocated to the control group and 25 were allocated to the IRI + Pmab group. The median progression-free survival was 254 days (95% confidence interval, 159-306) for control, and 190 days (95% confidence interval, 159-213) for IRI + Pmab (log-rank test, P = 0.26). The response rate without confirmation was 21.7% (5/23) for control and 40.0% (10/25) for IRI + Pmab. Neutropenia, leukopenia, and anorexia were the most common Grade 3/4 adverse events, and several early drop-outs from the treatment protocol were observed in the control group. As for the biomarkers, carcinoembryonic antigen and lactate dehydrogenase (LDH) smoothly declined immediately after the initial dosing in patients with a partial response or stable disease. After starting treatment, LDH-1 and - 2 increased, while LDH-4 and - 5 decreased, irrespective of tumor response. However, exceptions were frequent. In conclusion, this study failed to prove the safety and efficacy of irinotecan and panitumumab treatment due to insufficient patient accrual. Although LDH and its isozymes changed after initiation of treatment, their ability to predict the tumor response may not surpass that of carcinoembryonic antigen levels.The University Hospital Medical Information Network Clinical Trial Registry: UMIN000007658.
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Nakamura N, Tanaka C, Takeuchi-Kaneko Y. Transmission of antibiotic-resistance markers by hyphal fusion suggests partial presence of parasexuality in the root endophytic fungus Glutinomyces brunneus. Mycol Prog 2019. [DOI: 10.1007/s11557-018-1455-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Tanioka H, Honda M, Tanaka C, Morita Y, Ishibashi K, Kato T, Matsuda C, Kataoka M, Satake H, Munemoto Y, Kobayashi K, Takahashi M, Nakata K, Sakamoto J, Oba K, Mishima H. Biweekly S-1 plus oxaliplatin (SOX) reintroduction in previously treated metastatic colorectal cancer patients (ORION 2 study): a phase II study to evaluate the efficacy and safety. Int J Clin Oncol 2019; 24:836-841. [DOI: 10.1007/s10147-019-01414-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 02/06/2019] [Indexed: 11/29/2022]
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Matsuoka H, Morise Z, Tanaka C, Hayashi T, Ikeda Y, Maeda K, Masumori K, Koide Y, Katsuno H, Tanahashi Y, Nakajima S, Hanai T, Kato Y, Sugioka A, Uyama I. Repeat hepatectomy with systemic chemotherapy might improve survival of recurrent liver metastasis from colorectal cancer-a retrospective observational study. World J Surg Oncol 2019; 17:33. [PMID: 30770753 PMCID: PMC6377761 DOI: 10.1186/s12957-019-1575-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 02/08/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Although hepatectomy for metastatic colorectal cancer (mCRC) prolongs survival in up to 40% of people, recurrence rates approach 70%. We used a multidisciplinary approach to treat recurrent liver metastases, including chemotherapy, surgery, and palliative care. On the other hand, development of chemotherapeutic agents is remarkable and improves long-term survival. However, whether chemotherapy and repeat hepatectomy combination therapy improve survival or not is still unclear. The aim of this study was to analyze the outcomes of repeat hepatectomy with systemic chemotherapy for mCRC. METHODS Following Institutional Review Board approval, we reviewed the records of all patients who underwent hepatectomy for mCRC between 1974 and 2015 at Fujita Health University Hospital. We used the Kaplan-Meier method to estimate overall survival from the first and last hepatectomy in multi hepatectomy cases after 2005 and compared outcomes between groups using the log-rank test. RESULTS A total of 426 liver resections were performed for mCRC; of these, 236 cases were performed after 2005 (late group). In 118 (50%) cases, the site of recurrence was the liver, 59 (50%) underwent repeat hepatectomy, and 14 cases had ≥ 2 repeat hepatectomies. Overall survival (OS) before and after 2005 was 42.2 and 64.1 months, respectively, with the late group having better OS compared to the early (1974-2004) group. OS for single hepatectomy cases was 83.2 months, for two hepatectomies was 42.9 months, and for three hepatectomies was 35.3 months. In total, 59 patients did not undergo surgery after recurrence with an OS of 28.7 months. Mortality of the second and third repeat hepatectomy was 1.7% and 15.3%, respectively. CONCLUSION Repeat hepatectomy with systemic chemotherapy for mCRC is feasible and might achieve improved survival in carefully selected patients.
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Takahashi T, Sunami E, Kusumoto T, Ota M, Sakamoto Y, Tomita N, Maeda A, Tejima J, Okabe M, Tanaka C, Yamauchi J, Itabashi M, Kotake K, Takahashi K, Baba H, Boku N, Aiba K, Ishiguro M, Morita S, Sugihara K. A randomized phase III trial of S-1/oxaliplatin (SOX) versus UFT/leucovorin as adjuvant chemotherapy for high-risk stage III colon cancer: The ACTS-CC 02 trial. J Clin Oncol 2019. [DOI: 10.1200/jco.2019.37.4_suppl.484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
484 Background: The ACTS-CC 02 trial was designed to verify the superiority of postoperative adjuvant chemotherapy with S-1/oxaliplatin (SOX) over UFT/leucovorin (LV), one of the standard oral fluoropyrimidine regimens in Japan, in terms of disease-free survival (DFS) in patients (pts) with high-risk stage III colon cancer (any T, N2, or positive nodes around the origin of the feeding arteries). The results of the safety analysis have been reported previously (Clin Colorectal Cancer, 2018). We now present the 3-year DFS results as the primary endpoint. Methods: Pts who underwent curative resection for pathologically confirmed high-risk stage III colon cancer were randomly assigned to receive either UFT/LV (300–600 mg/day of UFT according to body surface area [BSA] and 75 mg/day of LV on days 1-28, every 35 days, 5 courses) or SOX (100 mg/m2 of oxaliplatin on day 1 and 80–120 mg/day of S-1 according to BSA on days 1-14, every 21 days, 8 courses). The primary endpoint was DFS. Results: From April 2010 through October 2014, a total of 966 pts were enrolled at 260 institutions. The full analysis set, excluding pts who withdrew informed consent before protocol treatment, comprised 478 and 477 pts in the UFT/LV group and SOX group, respectively. The median age was 65.0 years. The ECOG PS was 0 in 94.0%, and the disease stage was IIIA/IIIB/IIIC in 1.3%/50.2%/48.6%. The 3-year DFS rate was 60.6% in the UFT/LV group and 62.7% in the SOX group (HR: 0.90; 95% CI: 0.74-1.09; p = 0.28); the superiority of SOX was not demonstrated. In stage IIIB, the 3-year DFS rate was 69.3% and 68.5% in the UFT/LV group and SOX group, respectively (HR: 1.01; 95% CI: 0.74-1.37; p = 0.95). In Stage IIIC, the 3-year DFS rate was 50.6% and 55.8% in the UFT/LV group and SOX group, respectively (HR: 0.82, 95% CI: 0.63-1.06; p = 0.12). Notably, in the N2b subgroup, the 3-year DFS rate was 46.0% and 54.7% in the UFT/LV group and SOX group, respectively (HR: 0.76, 95% CI: 0.55-1.05; p = 0.10). Conclusions: SOX was not shown to be superior to UFT/LV in pts with high-risk stage III colon cancer. However, the oxaliplatin-based regimen was suggested to be more effective in advanced disease, such as stage IIIC and N2b. Clinical trial information: JapicCTI-101073.
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Sunakawa Y, Usher J, Satake H, Jaimes Y, Miyamoto Y, Nakamura M, Kataoka M, Shiozawa M, Takagane A, Terazawa T, Watanabe T, Ishigure K, Tanaka C, Sekikawa T, Takeuchi M, Fujii M, Danenberg K, Danenberg P, Lenz HJ, Ichikawa W. Gene mutation status in circulating tumor DNA (ctDNA) and first-line FOLFOXIRI plus bevacizumab (bev) in metastatic colorectal cancer (mCRC) harboring RAS mutation. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.089] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Honda M, Matsuda C, Tanaka C, Kondo K, Takahashi T, Kosugi C, Tokunaga Y, Takemoto H, Kim H, Sakamoto J, Oba K, Mishima H. A phase II study of bevacizumab and irinotecan plus alternate-day S-1 as a second-line therapy for colorectal cancer: The AIRS study. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.027] [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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Kanda M, Shimizu D, Tanaka H, Tanaka C, Kobayashi D, Hayashi M, Takami H, Niwa Y, Yamada S, Fujii T, Sugimoto H, Kodera Y. Synaptotagmin XIII expression and peritoneal metastasis in gastric cancer. Br J Surg 2018; 105:1349-1358. [PMID: 29741294 DOI: 10.1002/bjs.10876] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 02/11/2018] [Accepted: 03/16/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Peritoneal metastasis is a frequent cause of death in patients with gastric cancer. The aim of this study was to identify molecules responsible for mediating peritoneal metastasis of gastric cancer. METHODS Transcriptome and bioinformatics analyses were conducted to identify molecules associated with peritoneal metastasis. The therapeutic effects of intraperitoneally administered small interfering (si) RNA were evaluated using mouse xenograft models. Expression of mRNA and protein was determined in gastric tissues from patients with gastric cancer. RESULTS Synaptotagmin XIII (SYT13) was expressed at significantly higher levels in patients with peritoneal recurrence, but not in those with hepatic or distant lymph node recurrence. Inhibition of SYT13 expression in a gastric cancer cell line transfected with SYT13-specific siRNA (siSYT13) was associated with decreased invasion and migration ability of the cells, but not with proliferation and apoptosis. Intraperitoneal administration of siSYT13 significantly inhibited the growth of peritoneal nodules and prolonged survival in mice. In an analysis of 200 patients with gastric cancer, SYT13 expression in primary gastric cancer tissues was significantly greater in patients with peritoneal recurrence or metastasis. A high level of SYT13 expression in primary gastric cancer tissues was an independent risk factor for peritoneal recurrence. CONCLUSION SYT13 expression in gastric cancer is associated with perioneal metatases and is a potential target for treatment.
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Matsuda C, Honda M, Tanaka C, Kondo K, Takahashi T, Kosugi C, Tokunaga Y, Takemoto H, Kim HM, Sakamoto J, Oba K, Mishima H. A phase II study of bevacizumab and irinotecan plus alternate-day S-1 as a second-line therapy in patients with metastatic colorectal cancer: the AIRS study. Cancer Chemother Pharmacol 2018; 81:1035-1041. [PMID: 29644459 DOI: 10.1007/s00280-018-3568-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 03/22/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND The aim of this single-arm phase II clinical trial was to evaluate whether the alternate-day administration of S-1 plus irinotecan would reduce the incidence of severe diarrhea in comparison to consecutive-day S-1 administration (standard IRIS regimen) in second-line treatment for patients with metastatic colorectal cancer. METHODS Patients with metastatic colorectal cancer after failure with first-line treatment of oxaliplatin and fluoropyrimidine were enrolled. Irinotecan (150 mg/m2) and bevacizumab (5 mg/kg) were given intravenously on day 1. Oral S-1 was administered on alternate days at a dose of 40-60 mg twice a day. Cycles were repeated every 2 weeks. The primary endpoint was the incidence of grade ≥ 3 diarrhea. Our hypothesis set 21% as a threshold incidence and 10% as an expected incidence from previous studies with one-sided alpha 0.05. The secondary endpoints included the relative dose intensity, progression-free survival, overall survival and other adverse events. RESULTS A total of 51 patients were enrolled. The incidence of grade ≥ 3 diarrhea was 15.7% (8/51). Other common grade ≥ 3 adverse events were neutropenia, anemia, thrombocytopenia and fatigue were 13.7% (7/51), 5.9% (3/51), 2.0% (1/51) and 5.9% (3/51), respectively. The relative dose intensities of irinotecan, bevacizumab, and S-1 were 80.0, 86.8, and 77.7%, respectively. The median progression-free survival and overall survival were 8.4 months (5.8-9.8) and 17.1 months (11.8-22.3). CONCLUSIONS The alternate-day S-1 administration does not have significant effectiveness to reduce diarrhea in patients who received second-line treatment for metastatic colorectal cancer.
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Kimura Y, Tanaka C, Oka M. Identification of Major Enzymes Involved in the Synthesis of Diadenosine Tetraphosphate and/or Adenosine Tetraphosphate in Myxococcus xanthus. Curr Microbiol 2018; 75:811-817. [PMID: 29468302 DOI: 10.1007/s00284-018-1452-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 02/08/2018] [Indexed: 01/13/2023]
Abstract
Myxococcus xanthus generates diadenosine tetraphosphates (Ap4A) and diadenosine pentaphosphates (Ap5A) under various stress conditions. M. xanthus lysyl-tRNA synthetase (LysS) efficiently synthesizes Ap4A from ATP, Ap5A from ATP and adenosine tetraphosphate (Ap4), and Ap4 from ATP and triphosphate. To identify other M. xanthus enzymes that can catalyze Ap4A and Ap4 synthesis, 15 M. xanthus aminoacyl-tRNA synthetases (aaRSs), four acyl-CoA synthetases (Acys), three acetyl-CoA synthetases (Aces), phosphoglycerate kinase (Pgk), and adenylate kinase (Adk) were expressed in Escherichia coli and examined for Ap4A or Ap4 synthetase activity using ATP or ATP and triphosphate as substrates. Among the tested enzymes, LysS had the highest Ap4A synthetase activity. AlaRS, SerRS, and LeuRS1 showed high ADP synthetase activity with ATP as a substrate in the presence of pyrophosphatase, and also demonstrated the ability to produce Ap4 from ATP and triphosphate in the absence of pyrophosphatase. Ap4 formation by AlaRS, SerRS, and LeuRS1 was approximately 4- to 13-fold higher compared with that of Ap4A, suggesting that these enzymes prefer triphosphate over ATP as a substrate in the second reaction. Some of the recombinant M. xanthus Acys and Aces also synthesized Ap4 from ATP and triphosphate. However, Pgk was capable of catalyzing the production of Ap4 from ATP and 3-phosphoglycerate in the presence of Mg2+ and did not require triphosphate, suggesting that this enzyme is mainly responsible for Ap4 synthesis in M. xanthus.
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Iwata Y, Tanaka C, Komori S, Nagao N, Kawai M, Yoshida K, Kunieda K. Lobulated esophageal schwannoma resected with concurrent approach from the thorax and cervix. World J Surg Oncol 2018; 16:29. [PMID: 29439724 PMCID: PMC5812219 DOI: 10.1186/s12957-018-1334-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 02/05/2018] [Indexed: 12/16/2022] Open
Abstract
Background Esophageal schwannomas are rare esophageal submucosal tumors. We herein report a case of a lobulated esophageal schwannoma resected with concurrent approach from the thorax and cervix. Case presentation A 74-year-old woman visited our hospital with complaint of loss of consciousness, and a lobulated mediastinal tumor was discovered by chance in computed tomography. Upper gastrointestinal endoscopy showed a smooth elevated lesion at a position of 23–28 cm from the incisor teeth. A hypermetabolic appearance was noted on positron emission tomography. Based on these data, a gastrointestinal stromal tumor was suspected. The tumor was enucleated at the thoracic cavity while being pushed from the cervical incision. Pathological examination showed an esophageal schwannoma. Conclusions We experienced a case of lobulated esophageal schwannoma with fluorodeoxyglucose accumulation. We resected the tumor with concurrent approach from the thorax and cervix.
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Tanaka C, Itoh T, Iwasaki Y, Mizuno N, Nasuda S, Murai K. Direct interaction between VRN1 protein and the promoter region of the wheat FT gene. Genes Genet Syst 2018; 93:25-29. [DOI: 10.1266/ggs.17-00041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Sunakawa Y, Satake H, Usher JL, Jaimes YS, Miyamoto Y, Nakamura M, Nakayama H, Sugano N, Takagane A, Gotoh M, Watanabe T, Ishigure K, Tanaka C, Takeuchi M, Fujii M, DANENBERG KATHLEEN, Lenz HJ, Sekikawa T, Ichikawa W. Initial therapy with FOLFOXIRI plus bevacizumab (bev) for RAS mutant metastatic colorectal cancer (mCRC) and gene mutations in circulating tumor DNA (ctDNA) as a predictive marker for the efficacy: JACCRO CC-11. J Clin Oncol 2018. [DOI: 10.1200/jco.2018.36.4_suppl.635] [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
635 Background: We have reported that modified (m)-FOLFOXIRI plus bev was feasible and had a good objective response rate (ORR) for Japanese patients (pts) in a phase II trial of the JACCRO CC-11 (ESMO 2017 #543P). In addition, a pre-planned research was performed to investigate if the change of gene mutations in ctDNA during therapy can serve as a predictor for clinical outcomes in RAS mutant mCRC. Methods: The efficacy of m-FOLFOXIRI (irinotecan 150 mg/m², oxaliplatin 85 mg/m², levofolinate 200 mg/m², and fluorouracil 2400 mg/m² repeated biweekly) plus bev was evaluated prospectively in 62 pts (median age 63, 55% male, 92% PS0, and 27% right-sided tumors) with mCRC harboring RAS mutation (mt). The primary endpoint was ORR. Progression-free survival (PFS), overall survival, early tumor shrinkage (ETS), depth of response (DpR), and safety were secondary endpoints. Plasma samples for extraction of ctDNA were collected at 3 points (pre-, 8w, and progression) and analyzed for specific KRAS, NRAS, BRAF, and PIK3CA variants with real-time PCR assays. Results: Updated median follow-up time was 10.2 months. ORR and disease control rate were 75.8% and 96.8%, respectively. ETS was 73.8%, and median DpR was 49.6%. Median PFS was 11.5 months (95%CI 9.5-14.0). KRAS/ NRAS mt from pre-treatment plasma was confirmed in 79% of pts. In 41 pts with RAS mt at pre-treatment, mt status at 8 weeks predicted clinical outcomes (Table). Moreover, combined assessment of mt in ctDNA and ETS served as a refined predictor for efficacy. Pts with PIK3CA mt at pre-treatment had a poor outcome (ORR, 43%; median PFS, 8.8 months). Conclusions: FOLFOXIRI plus bev regimen is active for RAS mutant mCRC. RAS mt in ctDNA and ETS evaluation might potentially be a useful on-treatment biomarker in mCRC pts with RAS mt. Clinical trial information: UMIN000015152. [Table: see text]
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Nakamura N, Tanaka E, Tanaka C, Takeuchi-Kaneko Y. Localization of helotialean fungi on ectomycorrhizae of Castanopsis cuspidata visualized by in situ hybridization. MYCORRHIZA 2018; 28:17-28. [PMID: 29046936 DOI: 10.1007/s00572-017-0803-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Accepted: 10/11/2017] [Indexed: 05/16/2023]
Abstract
Non-ectomycorrhizal fungi that associate with typical ectomycorrhizae often remain hidden, and their localization inside ectomycorrhizal (ECM) roots has remained uncharacterized. In this study, the fungal community associated with the ectomycorrhizae of Castanopsis cuspidata was investigated using a culture-dependent isolation technique. Additionally, the species composition and localization were determined using molecular techniques. The results of the isolation and identification of fungal species revealed the predominance of a few species belonging to the order Helotiales. Furthermore, the fungal community structures were significantly different depending on the taxa of the ectomycorrhiza-forming fungi. A taxon-specific probe was developed to analyze the localization of one dominant Hyaloscyphaceae (Helotiales) species in ECM tissues by in situ hybridization. Hybridization signals were detected on the surface of the fungal mantle and around the ECM fungal cells within the mantle. Hyphal penetration into ECM hyphal cells of fungal mantles was also observed. Signals were not detected in the Hartig net or plant tissues inside the mantle in healthy ectomycorrhizae. These findings suggest that the analyzed species interact not only with host plant as root endophyte but also directly with the ECM fungi.
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Pertuit D, Mitaine-Offer AC, Miyamoto T, Tanaka C, Delaude C, Lacaille-Dubois MA. New terpenoid glycosides from Eriocoelum microspermum. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608240] [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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Sumita T, Izumitsu K, Tanaka C. Characterization of the autophagy-related gene BmATG8 in Bipolaris maydis. Fungal Biol 2017; 121:785-797. [PMID: 28800850 DOI: 10.1016/j.funbio.2017.05.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 05/26/2017] [Accepted: 05/29/2017] [Indexed: 10/19/2022]
Abstract
Autophagy is involved in cellular development and the maintenance of viability under nutrient deprivation in a wide range of eukaryotes. A filamentous ascomycete Bipolaris maydis, responsible for southern corn leaf blight, is also studied as a model fungus for sexual reproduction in filamentous ascomycetes that form filiform ascospores. In order to clarify the roles of autophagy in various stages of the life cycle of B. maydis, we constructed null mutants of BmATG8, an orthologue of the Saccharomyces cerevisiae autophagy gene ATG8 in B. maydis. Deletion of BmATG8 impaired localization of cytosolic components to the vacuole under nitrogen starvation, suggesting that autophagy was deficient in the null mutants. Additionally, fluorescent microscopic observations on a eGFP-fused BmATG8 expressing strain showed that BmATG8 is associated with autophagy-related structures. In vegetative growth, ΔBmATG8 strains showed a reduction in conidiation and aerial mycelial growth. Interestingly, the mutant conidia indicated loss of the germination rate under starvation conditions and affected longevity. However, germinated mutant conidia were still capable of infecting the host plant via appressoria. In sexual reproduction, ascospores with ΔBmATG8 genetic background were aborted. Our results revealed that autophagy plays a crucial role in the function of conidia, not in host infection via appressoria in B. maydis. In addition, conservation of the importance of autophagy in ascospore development is suggested among ascomycetes including species that form bitunicate ascus.
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