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Yamamura S, Kanai M, Takeuchi Y, Okita N, Kondo T, Yoshioka M, Matsubara J, Matsumoto S, Muto M. Response to capmatinib in a patient with neuroendocrine carcinoma of the gallbladder origin harboring MET amplification. Int Cancer Conf J 2024; 13:83-87. [PMID: 38524646 PMCID: PMC10957854 DOI: 10.1007/s13691-023-00643-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 11/26/2023] [Indexed: 03/26/2024] Open
Abstract
Neuroendocrine carcinoma (NEC) of the gallbladder origin is particularly rare, accounting for only 0.38% of primary malignancies of the gallbladder, and standard therapies are limited. The MET gene encodes the tyrosine kinase receptor, c-Met. Pathogenic variants of MET, such as MET exon 14 skipping and MET amplification, result in excessive downstream signaling that promotes tumor progression. A MET inhibitor, capmatinib, blocks signaling of c-Met and has been approved by the Food and Drug Administration for non-small cell lung cancer with MET exon 14 skipping. The effectiveness of capmatinib has been reported in other cancers with MET amplification, but NEC with MET variants has not been reported. Here, we present a case of a 72-year-old woman with NEC of the gallbladder with multiple liver and lymph node metastases, who was resistant to conventional chemotherapy including carboplatin plus etoposide as first-line treatment and irinotecan as second-line treatment, but she responded to capmatinib. After 6 weeks of treatment, CT scan showed a partial response (80% reduction in size), but after 13 weeks, regrowth of liver metastasis was observed. Herein, we report a meaningful efficacy of capmatinib to the patient of NEC of the gallbladder origin with MET amplification.
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Affiliation(s)
- Shogo Yamamura
- Department of Clinical Oncology, Kyoto University Hospital, Kyoto, Japan
| | - Masashi Kanai
- Department of Clinical Oncology, Kyoto University Hospital, Kyoto, Japan
| | - Yasuhide Takeuchi
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
| | - Natsuko Okita
- Clinical Research Support Office, National Cancer Center Hospital, Tokyo, Japan
| | - Tomohiro Kondo
- Department of Clinical Oncology, Kyoto University Hospital, Kyoto, Japan
| | - Masahiro Yoshioka
- Department of Clinical Oncology, Kyoto University Hospital, Kyoto, Japan
| | - Junichi Matsubara
- Department of Clinical Oncology, Kyoto University Hospital, Kyoto, Japan
| | - Shigemi Matsumoto
- Department of Clinical Oncology, Kyoto University Hospital, Kyoto, Japan
| | - Manabu Muto
- Department of Clinical Oncology, Kyoto University Hospital, Kyoto, Japan
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Matsumoto T, Ikoma T, Yamamura S, Miura K, Tsuduki T, Watanabe T, Nagai H, Takatani M, Yasui H. Author Correction: Regorafenib is suitable for advanced colorectal cancer patients who have previously received trifluridine/tipiracil plus bevacizumab. Sci Rep 2023; 13:11935. [PMID: 37488181 PMCID: PMC10366119 DOI: 10.1038/s41598-023-39009-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/26/2023] Open
Affiliation(s)
- Toshihiko Matsumoto
- Department of Clinical Oncology, Kobe City Medical Center General Hospital, 2‑1‑1, Minatojima Minamimachi, Chuo‑Ku, Kobe, Hyogo, 6500047, Japan.
- Cancer Treatment Center, Kansai Medical University, 2‑3‑1, Hirakatashinmachi, Hirakata, Osaka, 573‑1191, Japan.
| | - Tatsuki Ikoma
- Department of Clinical Oncology, Kobe City Medical Center General Hospital, 2‑1‑1, Minatojima Minamimachi, Chuo‑Ku, Kobe, Hyogo, 6500047, Japan
| | - Shogo Yamamura
- Department of Clinical Oncology, Kobe City Medical Center General Hospital, 2‑1‑1, Minatojima Minamimachi, Chuo‑Ku, Kobe, Hyogo, 6500047, Japan
| | - Kou Miura
- Department of Internal Medicine, Himeji Red Cross Hospital, 1‑12‑1, Shimoteno, Himeji, Hyogo, 6708540, Japan
| | - Takao Tsuduki
- Department of Internal Medicine, Himeji Red Cross Hospital, 1‑12‑1, Shimoteno, Himeji, Hyogo, 6708540, Japan
| | - Takanori Watanabe
- Department of Surgery, Himeji Red Cross Hospital, 1‑12‑1, Shimoteno, Himeji, Hyogo, 6708540, Japan
| | - Hiroki Nagai
- Department of Clinical Oncology, Kobe City Medical Center General Hospital, 2‑1‑1, Minatojima Minamimachi, Chuo‑Ku, Kobe, Hyogo, 6500047, Japan
| | - Masahiro Takatani
- Department of Internal Medicine, Himeji Red Cross Hospital, 1‑12‑1, Shimoteno, Himeji, Hyogo, 6708540, Japan
| | - Hisateru Yasui
- Department of Clinical Oncology, Kobe City Medical Center General Hospital, 2‑1‑1, Minatojima Minamimachi, Chuo‑Ku, Kobe, Hyogo, 6500047, Japan
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Matsumoto T, Ikoma T, Yamamura S, Miura K, Tsuduki T, Watanabe T, Nagai H, Takatani M, Yasui H. Regorafenib is suitable for advanced colorectal cancer patients who have previously received trifluridine/tipiracil plus bevacizumab. Sci Rep 2023; 13:2433. [PMID: 36765099 PMCID: PMC9918455 DOI: 10.1038/s41598-023-29706-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 02/09/2023] [Indexed: 02/12/2023] Open
Abstract
Regorafenib is a standard salvage line therapy used for advanced colorectal cancer (CRC). Recently, trifluridine/tipiracil (TFTD) plus bevacizumab also showed promising efficacy as a salvage line therapy for advanced CRC. However, the efficacy and safety of regorafenib for patients with advanced CRC who have previously received TFTD plus bevacizumab is unclear. We retrospectively collected clinicopathologic data from patients with advanced CRC who received regorafenib after TFTD plus bevacizumab in multiple institutions between April 2017 and June 2020.Thirty-four advanced CRC patients who received regorafenib were analyzed. The median age was 66.5 (range 43-81 years), 11 patients were male, and all had an ECOG performance status(PS) of 0 or 1. Twenty-two patients had left-sided tumors, 18 patients had RAS mutants, and 1 patient had a BRAF V600E mutation. The response rate was 0%, and the disease control rate was 31%. The median progression-free survival was 70 days (95% CI: 56-91), and the overall survival was 233 days (95% CI: 188-324). Treatment was discontinued in 32 patients, and 28 (82%) discontinued treatment due to progressive disease. The major grade 3 and4 toxicities were proteinurea (29%), hypertension (26%), hand-foot syndrome(15%), and platelet decrease (6%). Regorafenib after TFTD plus bevacizumab showed efficacy similar to that of the previous study, and no new adverse events were observed.
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Affiliation(s)
- Toshihiko Matsumoto
- Department of Clinical Oncology, Kobe City Medical Center General Hospital, 2-1-1, Minatojima Minamimachi, Chuo-Ku, Kobe, Hyogo, 6500047, Japan.
- Cancer Treatment Center, Kansai Medical University, 2-3-1, Hirakatashinmachi, Hirakata, Osaka, 573-1191, Japan.
| | - Tatsuki Ikoma
- Department of Clinical Oncology, Kobe City Medical Center General Hospital, 2-1-1, Minatojima Minamimachi, Chuo-Ku, Kobe, Hyogo, 6500047, Japan
| | - Shogo Yamamura
- Department of Clinical Oncology, Kobe City Medical Center General Hospital, 2-1-1, Minatojima Minamimachi, Chuo-Ku, Kobe, Hyogo, 6500047, Japan
| | - Kou Miura
- Department of Internal Medicine, Himeji Red Cross Hospital, 1-12-1, Shimoteno, Himeji, Hyogo, 6708540, Japan
| | - Takao Tsuduki
- Department of Internal Medicine, Himeji Red Cross Hospital, 1-12-1, Shimoteno, Himeji, Hyogo, 6708540, Japan
| | - Takanori Watanabe
- Department of Surgery, Himeji Red Cross Hospital, 1-12-1, Shimoteno, Himeji, Hyogo, 6708540, Japan
| | - Hiroki Nagai
- Department of Clinical Oncology, Kobe City Medical Center General Hospital, 2-1-1, Minatojima Minamimachi, Chuo-Ku, Kobe, Hyogo, 6500047, Japan
| | - Masahiro Takatani
- Department of Internal Medicine, Himeji Red Cross Hospital, 1-12-1, Shimoteno, Himeji, Hyogo, 6708540, Japan
| | - Hisateru Yasui
- Department of Clinical Oncology, Kobe City Medical Center General Hospital, 2-1-1, Minatojima Minamimachi, Chuo-Ku, Kobe, Hyogo, 6500047, Japan
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Matsumoto T, Yamamura S, Ikoma T, Kurioka Y, Doi K, Yasuda T, Boku S, Kawai T, Shibata N, Nagai H, Tsuduki T, Shimada T, Matsumoto Y, Tsumura T, Takatani M, Yasui H, Satake H. Real-World Data of Trifluridine/Tipiracil for Patients With Advanced Gastric Cancer: A Multi-Institutional Retrospective Study. Clin Med Insights Oncol 2022; 16:11795549221137135. [PMID: 36408335 PMCID: PMC9666830 DOI: 10.1177/11795549221137135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 10/19/2022] [Indexed: 11/16/2022] Open
Abstract
Background: A trial with trifluridine/tipiracil (FTD/TPI) versus placebo in patients with
heavily pretreated metastatic gastric cancer showed that FTD/TPI is
effective with manageable toxicity in these patients. However, real-world
data on the effects of FTD/TPI in patients with advanced gastric cancer
(AGC) are limited. Methods: We retrospectively collected and analyzed the clinicopathological data of
patients with AGC who received FTD/TPI monotherapy at our institutions (Kobe
City Medical Center General Hospital, Osaka Red Cross Hospital, Himeji Red
Cross Hospital, and Kansai Medical University Hospital) between September
2019 and July 2021. Tumor responses were evaluated based on the Response
Evaluation Criteria in Solid Tumors, version 1.1. Overall survival (OS) and
progression-free survival were estimated using the Kaplan-Meier method. Results: A total of 53 patients were included in the study. The median age was 70
(range, 37-85) years; 39 patients (74%) were men; the numbers of patients
with Eastern Cooperative Oncology Group performance status scores of 0, 1,
and 2 were 10 (19%), 39 (74%), and 4 (8%), respectively; and 27 patients
(51%) had diffuse-type histology. A total of 29 patients (56%) had ascites.
Prior nivolumab therapy was administered to 49 patients (92%). The response
rate and disease control rate (DCR) were 2% and 35%, respectively. The
median progression-free survival was 2.4 months, and OS was 5.8 months.
Patients with ascites exhibited significantly shorter OS (8.6 vs 4.7 months,
P = .0291) than those without ascites, and DCR (54% vs
18%, P = .0055) was significantly worse in patients with
ascites. There was no significant difference in the frequency of adverse
events of grade 3 or higher between patients with and without ascites. Conclusion: In a real-world setting, FTD/TPI has similar effectiveness as late-line
chemotherapy for patients with AGC, including those who previously had
received nivolumab.
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Affiliation(s)
- Toshihiko Matsumoto
- Department of Medical Oncology, Kobe City Medical Center General Hospital, Kobe, Japan
- Department of Internal Medicine, Japanese Red Cross Society Himeji Hospital, Himeji, Japan
- Cancer Treatment Center, Kansai Medical University, Hirakata, Japan
| | - Shogo Yamamura
- Department of Medical Oncology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Tatsuki Ikoma
- Cancer Treatment Center, Kansai Medical University, Hirakata, Japan
- Department of Clinical Oncology, Osaka Red Cross Hospital, Osaka, Japan
| | - Yusuke Kurioka
- Department of Internal Medicine, Japanese Red Cross Society Himeji Hospital, Himeji, Japan
- Department of Medical Oncology, Kochi Medical School, Nankoku, Japan
| | - Keitaro Doi
- Department of Clinical Oncology, Osaka Red Cross Hospital, Osaka, Japan
| | - Tomoyo Yasuda
- Cancer Treatment Center, Kansai Medical University, Hirakata, Japan
| | - Shogen Boku
- Cancer Treatment Center, Kansai Medical University, Hirakata, Japan
| | - Takashi Kawai
- Department of Surgery, Japanese Red Cross Society Himeji Hospital, Himeji, Japan
| | - Nobuhiro Shibata
- Cancer Treatment Center, Kansai Medical University, Hirakata, Japan
| | - Hiroki Nagai
- Department of Medical Oncology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Takao Tsuduki
- Department of Internal Medicine, Japanese Red Cross Society Himeji Hospital, Himeji, Japan
| | - Takanobu Shimada
- Department of Clinical Oncology, Osaka Red Cross Hospital, Osaka, Japan
| | - Yusuke Matsumoto
- Department of Surgery, Japanese Red Cross Society Himeji Hospital, Himeji, Japan
| | - Takehiko Tsumura
- Department of Clinical Oncology, Osaka Red Cross Hospital, Osaka, Japan
| | - Masahiro Takatani
- Department of Internal Medicine, Japanese Red Cross Society Himeji Hospital, Himeji, Japan
| | - Hisateru Yasui
- Department of Medical Oncology, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Hironaga Satake
- Department of Medical Oncology, Kobe City Medical Center General Hospital, Kobe, Japan
- Department of Medical Oncology, Kochi Medical School, Nankoku, Japan
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Tomita Y, Sueta D, Kakiuchi Y, Saeki S, Saruwatari K, Sakata S, Jodai T, Migiyama Y, Akaike K, Hirosako S, Fujisue K, Yamamura S, Miyazaki S, Takashio S, Izumiya Y, Nakamura K, Tsujita K, Ichiyasu H, Fujii K. Acute coronary syndrome as a possible immune-related adverse event in a lung cancer patient achieving a complete response to anti-PD-1 immune checkpoint antibody. Ann Oncol 2017; 28:2893-2895. [PMID: 28651328 DOI: 10.1093/annonc/mdx326] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Affiliation(s)
- Y Tomita
- Department of Respiratory Medicine.
| | - D Sueta
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | | | - S Saeki
- Department of Respiratory Medicine
| | | | - S Sakata
- Department of Respiratory Medicine
| | - T Jodai
- Department of Respiratory Medicine
| | | | - K Akaike
- Department of Respiratory Medicine
| | | | - K Fujisue
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - S Yamamura
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - S Miyazaki
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - S Takashio
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Y Izumiya
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | | | - K Tsujita
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | | | - K Fujii
- Department of Respiratory Medicine
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Bucay N, Sekhon K, Yang T, Majid S, Shahryari V, Hsieh C, Mitsui Y, Deng G, Tabatabai ZL, Yamamura S, Calin GA, Dahiya R, Tanaka Y, Saini S. MicroRNA-383 located in frequently deleted chromosomal locus 8p22 regulates CD44 in prostate cancer. Oncogene 2016; 36:2667-2679. [PMID: 27893706 PMCID: PMC5426972 DOI: 10.1038/onc.2016.419] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 08/30/2016] [Accepted: 09/30/2016] [Indexed: 12/13/2022]
Abstract
A major genomic alteration in prostate cancer (PCa) is frequent loss of chromosome (chr) 8p with a common region of loss of heterozygosity (LOH) at chr8p22 locus. Genomic studies implicate this locus in the initiation of clinically significant PCa and with progression to metastatic disease. However, the genes within this region have not been fully characterized to date. Here we demonstrate for the first time that a microRNA component of this region –miR-383- is frequently downregulated in prostate cancer, plays a critical role in determining tumor initiating potential and is involved in prostate cancer metastasis via direct regulation of CD44, a ubiquitous marker of PCa tumor initiating cells (TICs)/ stem cells. Expression analyses of miR-383 in PCa clinical tissues established that low miR-383 expression is associated with poor prognosis. Functional data suggests that miR-383 regulates PCa tumor initiating/ stem-like cells via CD44 regulation. Ectopic expression of miR-383 inhibited tumor initiating capacity of CD44+ PCa cells. Also, ‘anti-metastatic’ effects of ectopic miR-383 expression were observed in a PCa experimental metastasis model. In view of our results, we propose that frequent loss of miR-383 at chr8p22 region leads to tumor initiation and prostate cancer metastasis. Thus, we have identified a novel finding that associates a long observed genomic alteration to PCa stemness and metastasis. Our data suggests that restoration of miR-383 expression may be an effective therapeutic modality against PCa. Importantly, we identified miR-383 as a novel PCa tissue diagnostic biomarker with a potential that outperforms that of serum PSA.
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Affiliation(s)
- N Bucay
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - K Sekhon
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - T Yang
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - S Majid
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - V Shahryari
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - C Hsieh
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - Y Mitsui
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - G Deng
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - Z L Tabatabai
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - S Yamamura
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - G A Calin
- Department of Experimental Therapeutics, Non-Coding RNA Center, MD Anderson Cancer Center, University of Texas, Houston, TX, USA
| | - R Dahiya
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - Y Tanaka
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
| | - S Saini
- Department of Urology, Veterans Affairs Medical Center, San Francisco and University of California San Francisco, San Fransisco, CA, USA
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Kawai M, Kirkness JP, Yamamura S, Imaizumi K, Yoshimine H, Oi K, Ayuse T. Increased phosphatidylcholine concentration in saliva reduces surface tension and improves airway patency in obstructive sleep apnoea. J Oral Rehabil 2013; 40:758-66. [DOI: 10.1111/joor.12094] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2013] [Indexed: 11/27/2022]
Affiliation(s)
- M. Kawai
- Department of Clinical Physiology; Nagasaki University Graduate School of Biomedical Science; Nagasaki Japan
| | - J. P. Kirkness
- Division of Pulmonary and Critical Care Medicine; The Johns Hopkins School of Medicine; Johns Hopkins Sleep Disorders Center; Baltimore MD USA
| | | | | | - H. Yoshimine
- Department of Internal Medicine; Inoue Hospital; Nagasaki Japan
| | - K. Oi
- Department of Clinical Physiology; Nagasaki University Graduate School of Biomedical Science; Nagasaki Japan
| | - T. Ayuse
- Department of Clinical Physiology; Nagasaki University Graduate School of Biomedical Science; Nagasaki Japan
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Kakehashi R, Tokai N, Kohno T, Nakatsuji Y, Yamamura S, Karlsson G. Protonation behavior and solution properties of amine oxide surfactants containing a pyridyl group. J Oleo Sci 2013; 62:123-32. [PMID: 23470439 DOI: 10.5650/jos.62.123] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Hydrogen bonding between surfactant molecules plays an important role in self-assembly formation. For long alkyl chain amine oxide surfactants, the specific protonation degree dependence of some solution properties has been considered to be due to hydrogen bonding between protonated and deprotonated species. In addition to this type of hydrogen bonding, we introduced a pyridyl group into an alkylamine oxide molecule as a new hydrogen-bonding site. The pyridyl group has three different structural isomers based on the position of the substituent. An amine oxide group in pyridylamine oxides was preferentially protonated. In addition, protonation of the pyridyl group revealed a pronounced substituent position effect on the critical micelle concentration, micellar size, and solubilization of oil-soluble dye into micelles. The intermolecular or intramolecular hydrogen bond formation could be controlled by altering the substituent position.
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Affiliation(s)
- R Kakehashi
- Organic Materials Research Division, Osaka Municipal Technical Research Institute, 1-6-50 Morinomiya, Joto-ku, Osaka 836-8553, Japan.
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Itatani R, Oda S, Utsunomiya D, Funama Y, Honda K, Katahira K, Morishita S, Yamamura S, Namimoto T, Yamashita Y. Reduction in radiation and contrast medium dose via optimization of low-kilovoltage CT protocols using a hybrid iterative reconstruction algorithm at 256-slice body CT: phantom study and clinical correlation. Clin Radiol 2012; 68:e128-35. [PMID: 23245269 DOI: 10.1016/j.crad.2012.10.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 10/15/2012] [Accepted: 10/26/2012] [Indexed: 12/19/2022]
Abstract
AIM To optimize low-kilovoltage (kV) computed tomography (CT) protocols using a hybrid iterative reconstruction (HIR) algorithm at 256-detector-row body CT. MATERIALS AND METHODS Based on preliminary phantom studies, three different tube voltage protocols with an equal contrast-to-noise ratio (CNR) were developed. They were a conventional 120 kV protocol with filtered back-projection (FBP), an 80 kV protocol with HIR (a 160% increase in the tube current-time product and a 40% reduction in the contrast medium dose), and a 100 kV protocol with HIR (a 20% reduction in the tube current-time product and the contrast medium dose). The clinical study included 70 patients (34 women, 36 men; mean age 70.5 ± 9.1 years, range 44-92 years) who had undergone CT at 120 kV a mean of 148 ± 137 days before undergoing low kV contrast-enhanced body CT (80 kV with HIR, n = 35; 100 kV with HIR, n = 35). The estimated effective radiation dose (ED), image noise, and CNR were calculated and the visual image quality was scored on a four-point scale. RESULTS Mean ED was 12.3, 8.4, and 15.4 mSv for the 80, 100, and 120 kV protocol, respectively, and significantly lower using the low kV protocols. There was no significant difference in the image noise and CNR between the low kV protocols with HIR and the 120 kV protocol with FBP, or in the visual scores among the three protocols. CONCLUSION Without ensuing image-quality degradation, the radiation and contrast medium dose can be reduced with optimal contrast-enhanced CT protocols using a low kV technique and an HIR algorithm.
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Affiliation(s)
- R Itatani
- Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, Japan
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Sugawara Y, Ootaki M, Yamamura S, Endo S, Nakasako M. Humidity-induced phase transition of xylose isomerase. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311086764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Miura K, Osaka K, Yamamura S, Sugawara Y. Noble humidity control system for in situX-ray powder diffraction at SPring-8. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311094001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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12
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Yamamura S, Sugawara Y. Freezing of disordered hydrogen-bonding networks observed in nucleotide hydrates. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311080822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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13
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Kiyotani T, Ida T, Yamamura S, Sugawara Y. Crystal structures and humidity-dependent phase transitions of Gly- L-Tyr hydrates. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311093196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Yamamura S, Matsumura N, Mandai M, Huang Z, Oura T, Baba T, Hamanishi J, Yamaguchi K, Kang HS, Okamoto T, Abiko K, Mori S, Murphy SK, Konishi I. The activated transforming growth factor-beta signaling pathway in peritoneal metastases is a potential therapeutic target in ovarian cancer. Int J Cancer 2011; 130:20-8. [PMID: 21503873 DOI: 10.1002/ijc.25961] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Accepted: 12/20/2010] [Indexed: 11/07/2022]
Abstract
Peritoneal dissemination including omental metastasis is the most frequent route of metastasis and an important prognostic factor in advanced ovarian cancer. We analyzed the publicly available microarray dataset (GSE2109) using binary regression and found that the transforming growth factor (TGF)-beta signaling pathway was activated in omental metastases as compared to primary sites of disease. Immunohistochemical analysis of TGF-beta receptor type 2 and phosphorylated SMAD2 indicated that both were upregulated in omental metastases as compared to primary disease sites. Treatment of the mouse ovarian cancer cell line HM-1 with recombinant TGF-β1 promoted invasiveness, cell motility and cell attachment while these were suppressed by treatment with A-83-01, an inhibitor of the TGF-β signaling pathway. Microarray analysis of HM-1 cells treated with TGF-β1 and/or A-83-01 revealed that A-83-01 efficiently inhibited transcriptional changes that are induced by TGF-β1. Using gene set enrichment analysis, we found that genes upregulated by TGF-β1 in HM-1 cells were also significantly upregulated in omental metastases compared to primary sites in the human ovarian cancer dataset, GSE2109 (false discovery rate (FDR) q = 0.086). Therapeutic effects of A-83-01 in a mouse model of peritoneal dissemination were examined. Intraperitoneal injection of A-83-01 (150 μg given three times weekly) significantly improved survival (p = 0.015). In summary, these results show that the activated TGF-β signaling pathway in peritoneal metastases is a potential therapeutic target in ovarian cancer.
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Affiliation(s)
- Shogo Yamamura
- Department of Gynecology and Obstetrics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Matsumura N, Mandai M, Okamoto T, Yamaguchi K, Yamamura S, Oura T, Baba T, Hamanishi J, Kang HS, Matsui S, Mori S, Murphy SK, Konishi I. Sorafenib efficacy in ovarian clear cell carcinoma revealed by transcriptome profiling. Cancer Sci 2010; 101:2658-63. [PMID: 21040214 DOI: 10.1111/j.1349-7006.2010.01736.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The purpose of this study was to investigate a new modality of therapy against ovarian clear cell carcinoma (OCCC), a chemoresistant subtype of ovarian cancer. Microarray datasets of ovarian cancer cell lines and cancer tissues were analyzed using bioinformatic tools. The gene expression profile of OCCC was similar to that of renal cell carcinoma (RCC). This similarity was at least partially due to hepatocyte nuclear factor 1 pathway activation common to both malignancies. In addition, oncogenic pathway alterations were characteristic of OCCC including hypoxia inducible factor 1 alpha subunit and relatively high Ras activities. Therefore, we predicted that the multi-kinase inhibitor sorafenib, which is approved for RCC and suppresses Ras activity, would also be effective against OCCC. Orally administered sorafenib (40 mg/kg per day) significantly inhibited tumor growth in nude mice when it was given after inoculation with the OCCC cell line RMG-2 (P = 0.002). Furthermore, sorafenib significantly reduced tumor size when it was administered to established RMG-2 tumors (P = 0.0002), while intraperitoneal injection of cisplatin (5 mg/kg per week) did not. In conclusion, the prominent anti-tumor effect of sorafenib against OCCC indicates that sorafenib is a promising candidate drug and supports the need for clinical trials using sorafenib against OCCC. This report demonstrates a method to utilize genome-wide information to facilitate translational research for treatments against less common subtypes of cancers.
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Affiliation(s)
- Noriomi Matsumura
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Suzuki T, Kikuchi H, Yamamura S, Terada K, Yamamoto K. The change in characteristics of microcrystalline cellulose during wet granulation using a high-shear mixer. J Pharm Pharmacol 2010; 53:609-16. [PMID: 11370700 DOI: 10.1211/0022357011775938] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
The objective of this study was to investigate the mechanism of hard granule formation and to demonstrate the applicability of X-ray diffraction methods for studying the polymeric pharmaceutical excipients. Using a high-shear mixer, microcrystalline cellulose (MCC) was granulated with water as the granulating liquid. The hardness of the MCC granules increased with granulation time and the amount of water added. The specific surface area measured by the N2 adsorption method was reduced during the process. Crystallite size of cellulose, calculated by Scherrer's equation adapted for wide angle X-ray diffraction method, decreased with granulation time and with increasing amounts of water added. Debye plots for X-ray small scattering patterns suggested that the average magnitude of the continuous solid region in MCC granules became significantly greater, whereas the specific surface area of the MCC granules, calculated from Debye plots, became smaller in comparison with that of intact MCC. These findings suggested that the long-chain structures in MCC were disrupted, resulting in smaller units with shorter chain lengths due to the strong shear force of the impeller. These smaller units then form a network within the granules. Thus, MCC granules are strengthened with longer granulation time and greater amounts of water, resulting in a more intricate network. The change in MCC chain length and physical structure can be experimentally detected using the small-angle X-ray scattering and wide-angle powder X-ray diffraction methods.
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Affiliation(s)
- T Suzuki
- Pharmaceutical Formulation Research Laboratory, Daiichi Pharmaceutical Co., Ltd., Tokyo, Japan.
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Yamamura S, Ohoyama K, Nagase H, Okada M. Zonisamide enhances delta receptor-associated neurotransmitter release in striato-pallidal pathway. Neuropharmacology 2009; 57:322-31. [PMID: 19482038 DOI: 10.1016/j.neuropharm.2009.05.005] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Revised: 05/17/2009] [Accepted: 05/19/2009] [Indexed: 11/26/2022]
Abstract
A recent randomized control study demonstrated that zonisamide (ZNS), an antiepileptic drug, is effective in Parkinson's disease at the lower than the therapeutic doses against epilepsy (25-50 mg/day); however, the detailed mechanism of antiparkinsonian effects of ZNS remains to be clarified. To determine the mechanism of antiparkinsonian effect of ZNS, we investigated the effects of ZNS on extracellular levels of dopamine in the striatum (STR), glutamate in substantia nigra pars reticulata (SNr), GABA in globus pallidus (GP), subthalamic nucleus (STN) and SNr, using multiple microdialysis probes. Striatal perfusion of 1000 microM ZNS (within therapeutic-relevant concentration against epilepsy) increased extracellular levels of dopamine in STR, whereas 100 microM ZNS (lower than the therapeutic-relevant concentration against epilepsy but within the therapeutic rage against Parkinson's disease) did not affect it. Striatal perfusion of ZNS (100 and 1000 microM) decreased the extracellular levels of GABA in STN and glutamate in SNr, but decreased extracellular GABA level in GP without affecting GABA level in SNr. These concentration-dependent effects of ZNS on extracellular neurotransmitter levels were independent of dopamine and delta(2) receptors; however, blockade of delta(1) receptor inhibited the effects of ZNS. Furthermore, activation of delta(1) receptor enhanced the effects of ZNS on neurotransmitter level. These results suggest that ZNS does not affect the direct pathway but inhibits the indirect pathway, which is mediated by delta(1) receptor. Therefore, the antiparkinsonian effects of ZNS seem to be mediated through the interaction between lower than therapeutically-relevant concentration against epilepsy of ZNS (100 microM) and delta(1) receptor.
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Affiliation(s)
- S Yamamura
- Department of Psychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
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Yamamura S, Ohoyama K, Hamaguchi T, Nakagawa M, Suzuki D, Matsumoto T, Motomura E, Tanii H, Shiroyama T, Okada M. Effects of zotepine on extracellular levels of monoamine, GABA and glutamate in rat prefrontal cortex. Br J Pharmacol 2009; 157:656-65. [PMID: 19371334 DOI: 10.1111/j.1476-5381.2009.00175.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE The atypical antipsychotic drug, zotepine, is effective in treatment of schizophrenia and acute mania, but the incidence of seizures during treatment is higher than with other antipsychotics. In addition, the mechanisms underlying the clinical actions of zotepine remain uncharacterized. EXPERIMENTAL APPROACH The effects of intraperitoneal administration of zotepine and haloperidol on the extracellular levels of noradrenaline, dopamine, 5-HT, GABA, and glutamate in the medial prefrontal cortex (mPFC) were compared. Neuronal activities induced by each drug in the ventral tegmental area (VTA), locus coeruleus (LC), dorsal raphe nucleus (DRN) and mediodorsal thalamic nucleus (MTN) were also analysed. KEY RESULTS Haloperidol did not affect extracellular neurotransmitter levels in the mPFC. In contrast, zotepine activated neuronal activities in all nuclei and increased the extracellular levels of noradrenaline, dopamine, GABA, and glutamate in the mPFC, but not 5-HT levels. The zotepine-stimulated neuronal activity in the VTA, LC, DRN and MTN enhanced the release of dopamine, noradrenaline, 5-HT, glutamate and GABA in the mPFC, although the enhanced GABAergic transmission possibly inhibited noradrenaline, dopamine and 5-HT release. The other afferent to mPFC, which releases dopamine and noradrenaline, was partially insensitive to GABAergic inhibition, but possibly received stimulatory AMPA/glutamatergic regulation from the MTN. CONCLUSIONS AND IMPLICATIONS Our results indicated that the positive interaction between prefrontal catecholaminergic transmission and AMPA/glutamatergic transmission from MTN might explain the regulatory effects of zotepine on neurotransmitter release. A mechanism is suggested to account for the pharmacological profile of this atypical antipsychotic and for its pro-convulsive action.
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Affiliation(s)
- S Yamamura
- Department of Psychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Mie, Japan
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Takusagawa H, Yamamura S, Endo S, Ida K, Sugawara Y. Analysis of crystal growth of trigonal ribonuclease A from bovine pancreas. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hasegawa K, Ootaki M, Yamamura S, Sugawara Y. Crystal morphology and surface microtopograph of disodium inosine 5′-monophosphate octahydrate. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Yamamura S, Yamamoto A, Maruyama T, Nishi R, Sugiyama A, Sugawara Y. Polymorphs and humidity-induced transition of a serotonin receptor antagonist, C 29H 33N 3O 2·HCl· xH 2O. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308085528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Nishikawa S, Yamamura S, Sugawara Y, Matsushita M, Sugawara T. Temperature-dependent disordered structure of (BEDT-TTF) 3Cl 2·5H 2O. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308084845] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sugawara T, Matsushita M, Komatsu H, Yamamura S, Sugawara Y. Genuine organic crystal exhibiting giant negative magnetoresistance. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308083384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Yamamura S, Morishima H, Kumano-go T, Suganuma N, Matsumoto H, Adachi H, Sigedo Y, Mikami A, Kai T, Masuyama A, Takano T, Sugita Y, Takeda M. The effect of Lactobacillus helveticus fermented milk on sleep and health perception in elderly subjects. Eur J Clin Nutr 2007; 63:100-5. [PMID: 17851460 DOI: 10.1038/sj.ejcn.1602898] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To study the effect of Lactobacillus helveticus fermented milk on sleep and health perception in elderly healthy subjects. SUBJECTS The study included 29 healthy elderly subjects aged 60-81 years. METHODS Prospective, randomized, double-blind and placebo-controlled, with a crossover design. The study included two intervention periods of 3 weeks each, separated by a 3-week washout period. Subjects took 100 g of fermented milk drink or a placebo drink (artificially acidified milk) daily in the first supplementary period and the other drink in the second supplementary period. For each period, we measured sleep quality by means of actigraphy and a sleep questionnaire, and assessed the quality of life (QOL) by SF-36 health survey. RESULTS There was a significant improvement in sleep efficiency (P=0.03) and number of wakening episodes (P=0.007) in actigraph data after intake of fermented milk, whereas no significant changes were observed for the placebo. Fermented milk did not improve the SF-36 scores significantly from the baseline period. In the GH domain (general health perception) of the SF-36, however, there was marginal improvement as compared to the baseline period. Although the difference between fermented milk and placebo was not statistically significant for any of the sleep or QOL parameters, fermented milk produced slightly greater mean values for many parameters. CONCLUSION This short-term (3-week) intervention study indicates that Lactobacillus helveticus fermented milk may have a more favorable effect on improving sleep in healthy elderly people as compared with placebo.
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Affiliation(s)
- S Yamamura
- Psychiatry, Department of Integrated Medicine, Division of Internal Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
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Payne S, Day J, Cottrell S, deVos T, Yamamura S, Lograsso J, Sarroza D, O'Campo Y, Morotti A, Sledziewski A. 4009 POSTER Urine is the preferred remote body fluid for early identification of prostate cancer using real-time PCR detection of DNA methylation markers. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71077-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Suganuma N, Kikuchi T, Yanagi K, Yamamura S, Morishima H, Adachi H, Kumano-go T, Mikami A, Sugita Y, Takeda M. P0109 Media use increases sleep disturbance and obesity whereas insomnia associates eating habits. Sleep Med 2007. [DOI: 10.1016/s1389-9457(07)70364-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Suganuma N, Kikuchi T, Yanagi K, Yamamura S, Morishima H, Adachi H, Kumano-go T, Mikami A, Sugita Y, Takeda M. P0049 Media use before sleep can curtail sleep time and increase sleep complaints. Sleep Med 2007. [DOI: 10.1016/s1389-9457(07)70308-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Lei S, Tero R, Misawa N, Yamamura S, Wan L, Urisu T. AFM characterization of gramicidin-A in tethered lipid membrane on silicon surface. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.07.091] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Yamamura S, Moriguchi T, Yoneda S, Sugawara Y. Bifurcation and metastable states in phase transitions of nucleotide hydrates. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305086095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hatakeyama N, Yamazaki M, Shibuya N, Yamamura S, Momose Y. Effects of ketamine on voltage-dependent calcium currents and membrane potentials in single bullfrog atrial cells. J Anesth 2005; 15:149-53. [PMID: 14566513 DOI: 10.1007/s005400170017] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PURPOSE This study was undertaken to assess the effect of ketamine on L-type calcium channel current (I(Ca)) and membrane action potential in the bullfrog single atrial myocyte. METHODS Bullfrog single atrial myocytes were prepared by enzymatic dispersion. Whole-cell voltage-clamp technique and current clamp technique were used to monitor I(Ca), membrane resting potential, and action potential. RESULTS Ketamine (10(-5)-10(-3) M) showed dose-dependent inhibition of I(Ca) in a reversible manner. The 50% inhibitory concentration (IC(50)) of ketamine on I(Ca) was estimated to be 0.92 x 10(-5) M. Use-dependent block of I(Ca) was not observed. The resting membrane potential was depolarized at a high concentration (10(-4) M) of ketamine. Reduction of the plateau phase and prolonged duration of the action potential were observed in the presence of a high concentration of ketamine (10(-4) M). CONCLUSION Ketamine has an inhibitory effect on I(Ca) in the bullfrog single atrial myocyte, and a high dose (10(-4) M) of ketamine prolonges the duration of the action potential. The mechanism of inhibition of I(Ca) seems to be a direct effect on the L-type calcium channel, not like an open channel blocker.
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Affiliation(s)
- N Hatakeyama
- Department of Anesthesiology, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Toyama 930-0194, Japan
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Yamamura S, Takehira R, Kawada K, Nishizawa K, Katayama S, Hirano M, Momose Y. Application of artificial neural network modelling to identify severely ill patients whose aminoglycoside concentrations are likely to fall below therapeutic concentrations. J Clin Pharm Ther 2004; 28:425-32. [PMID: 14632968 DOI: 10.1046/j.0269-4727.2003.00514.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Identification of ICU patients whose concentrations are likely to fall below therapeutic concentrations using artificial neural network (ANN) modelling and individual patient physiologic data. METHOD Data on indicators of disease severity and some physiologic data were collected from 89 ICU patients who received arbekacin (ABK) and 61 who received amikacin (AMK). Three-layer ANN modelling and multivariate logistic regression analysis were used to predict the plasma concentrations of the aminoglycosides (ABK and AMK) in the severely ill patients. RESULTS Predictive performance analysis showed that the sensitivity and specificity of ANN modelling was superior to multivariate logistic regression analysis. For accurate modelling, a predictable range should be inferred from the data structure before the analysis. Restriction of the predictable region, based on the data structure, increased predictive performance. CONCLUSION ANN analysis was superior to multivariate logistic regression analysis in predicting which patients would have plasma concentrations lower than the minimum therapeutic concentration. To improve predictive performance, the predictable range should be inferred from the data structure before prediction. When applying ANN modelling in clinical settings, the predictive performance and predictable region should be investigated in detail to avoid the risk of harm to severely ill patients.
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Affiliation(s)
- S Yamamura
- School of Pharmaceutical Sciences, Toho University, Funabashi, Chiba, Japan.
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Sugiura H, Yamamura S, Sato K, Katagiri H, Nishida Y, Nakashima H, Yamada Y. Remodelling and healing process of moderately heat-treated bone grafts after wide resection of bone and soft-tissue tumors. Arch Orthop Trauma Surg 2003; 123:514-20. [PMID: 12844230 DOI: 10.1007/s00402-003-0556-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2002] [Indexed: 11/29/2022]
Abstract
INTRODUCTION In the reconstruction of extensive bone defects after massive resection of malignant musculoskeletal tumors, the clinical results of moderately heat-treated autogenous bone graft have rarely been documented. We evaluated the remodelling and healing process of moderately heat-treated autogenous bone graft by means of imaging features. MATERIALS AND METHODS The subjects of this study were 19 patients with bone and soft-tissue tumors treated by heat-treated bone graft at our institution between 1992 and 2001, the mean follow-up period was 4.8+/-2.8 years (range 1-9 years). The remodelling and healing process of heat-treated bone graft was evaluated by means of radiography, bone scintigraphy, and MRI. RESULTS The mean period to obtain bone union between host bone and grafted bone was 9.4 months. Infection was noted in 1 patient, and fracture was present in 2 patients. In 6 patients, pseudoarthrosis was found. Bone scintigraphy showed an increased uptake at the host-graft junction in the period between 3 and 36 months (median 10.7 months) postoperatively. A gradually increased diffuse uptake on the grafted side was evident at an average of 29.1 months (range 19-41 months) postoperatively. High signal intensity on T2-weighted images was observed in the early period after surgery, and iso-intense or low signal intensity became evident after an average of 28.3 months. A gradually increased diffuse uptake on scintigraphy and iso-intense or low signal intensity on T2-weighted images indicated remodelling of the grafted bone. CONCLUSION Bone union of a moderately heat-treated autogenous bone graft was noted at about 9 months, and its remodelling was proceeding at about 30 months. This method will be useful for bone defects after massive resection of soft-tissue and bone tumors.
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Affiliation(s)
- H Sugiura
- Orthopaedic Department, Aichi Cancer Center, 1-1 Kanokoden, Chikusa-ku, 464-8681, Nagoya, Japan.
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Abstract
Celecoxib, a poorly water-soluble drug, was converted into a glassy state by melt quenching. The properties of glassy celecoxib were studied using infrared (IR) spectroscopy, differential scanning calorimetry (DSC), X-ray powder diffraction (XRPD), intrinsic dissolution rate (IDR), and thin-layer-chromatography (TLC). Glass transition occurred at 51.8 degrees C. Infrared spectrum of glass has revealed significant changes due to H-bonding. Celecoxib glass shows around 15 times faster dissolution as compared with the crystalline state. Heckel plot analysis has shown better compressibility in glassy state. Unpulverized glass remained stable for 3 months, whereas after pulverization about 70% crystallinity was gained in 100 hours. Further attempts may be carried out to stabilize the glass.
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Affiliation(s)
- A R Paradkar
- Department of Pharmaceutics, Poona College of Pharmacy, Bharati Vidyapeeth Deemed University, Erandwane, Pune, Maharashtra State, India.
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Yamamura S, Sugawara Y, Terao H, Sugawara T. Structural phase transition and dielectric behavior of o-phenylenebis(squaric acid) salt. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302090980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
Most people are familiar with the sight of a young seedling bending towards a window or the brightest source of light to which it is exposed. This directional growth response is known as phototropism, which is caused by a lateral growth-promoting auxin in the bending organ (Cholodny-Went theory, cited in high school textbook). Recently, however, Bruinsma et al., Weiler et al., and Hasegawa et al. independently found that the shaded half did not contain more auxin than the illuminated one. Instead it was found that the even distribution of auxin was accompanied by a lateral gradient of growth inhibiting substances during phototropic curvature (Bruinsma-Hasegawa theory). We have isolated some photo-induced growth inhibitory substances related to phototropism, benzoxazolinones from light-grown maize shoots (Zea mays L.), raphanusanins from radish hypocotyl (Raphanus sativus var. hortensis f. gigantissimus M.), indolyacetonitrile from light-grown shoots (Brassica oleacea L.), 8-epixanthatin from sunflower hypocotyl (Helianthus annus L.), and quite recently uridine from oat coleoptile (Avena sativa L.). Chemical analyses have shown phototropic stimulations to cause curvature by inducing a local unequal distribution of growth-inhibiting substances that antagonize auxin in its cell-elongating activity. Finally, a model is presented for further studies on phototropism.
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Affiliation(s)
- S Yamamura
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
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Tashiro H, Sonoda K, Ohshiro T, Ohta M, Yamamura S, Ishikawa T, Itasaka H, Matsusaka T, Kume K. [Treatment outcomes with vinorelbine for metastatic breast cancer patients previously treated with both doxorubicin and docetaxel]. Gan To Kagaku Ryoho 2001; 28:1397-401. [PMID: 11681247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
The purpose of this study was to evaluate the efficacy and toxicity of weekly vinorelbine (VNB) in patients with metastatic breast cancer previously treated with both adriamycin (ADM) and docetaxel (TXT). VNB was administered weekly at the dose 20 mg/m2 by i.v. infusion over 20 minutes followed by flushing the vein with 100 ml of normal saline. From June 1999 to August 2000, ten patients were enrolled in this study. Patient characteristics were that the cumulative doses (median) of previous ADM and TXT were 300 mg (range, 120-880 mg), 560 mg (range, 120-960 mg) respectively. The median number of metastatic sites was four, with poor performance status (ECOG 1-2: 40%, 3-4: 60%). The median cycles of weekly VNB were seven (range: 2-12). Two of 10 assessable patients obtained partial response, with an overall response rate of 20%. The main toxicity (NCI grade 4) was leukopenia in 10% of 10 patients. Phlebitis (grade 2) was observed in 4 of 10 patients (40%). VNB is an active agent against metastatic breast cancer pretreated with both ADM and TXT, possessing no severe toxicities.
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Affiliation(s)
- H Tashiro
- Dept. of Surgery, Matsuyama Red Cross Hospital
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38
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Ogose A, Hotta T, Inoue Y, Sakata S, Takano R, Yamamura S. Myxoid liposarcoma metastatic to the thoracic epidural space without bone involvement: report of two cases. Jpn J Clin Oncol 2001; 31:447-9. [PMID: 11689600 DOI: 10.1093/jjco/hye094] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Myxoid liposarcoma can frequently metastasize to extrapulmonary sites. We present two cases of myxoid liposarcoma metastatic to the epidural space. Both patients complained of back pain, but plain radiography revealed no abnormality. MR imaging clearly demonstrated metastatic tumors in the epidural space, but no involvement of vertebra. When patients with myxoid liposarcoma complain of back pain, metastasis in the epidural space should be considered even in patients without bone involvement.
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Affiliation(s)
- A Ogose
- Department of Orthopedic Surgery, Niigata University School of Medicine, Niigata, Japan.
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39
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Sugiura H, Katagiri H, Yonekawa M, Sato K, Yamamura S, Iwata H. Walking ability and activities of daily living after limb salvage operations for malignant bone and soft-tissue tumors of the lower limbs. Arch Orthop Trauma Surg 2001; 121:131-4. [PMID: 11262776 DOI: 10.1007/s004020000192] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
We evaluated the number of steps, activities of daily life (ADL) score, Enneking score, active range of motion and muscle strength by muscle manual testing for function in lower limbs after reconstructive procedures in surgical treatment of tumors. The 56 patients with 20 malignant bone tumors and 36 malignant soft-tissue tumors averaged 7119 +/- 3563 steps per day, or 69.8% of the control group. The average ADL score of patients was 14.0 +/- 4.1 points (70.0%), and the average Enneking score 20.4 +/- 6.0 points (68.0%). The scores of the bone tumor group were lower than those of the soft-tissue tumor group. These scores were not correlated with the range of motion. The number of steps and ADL score were correlated with Enneking score (coefficient 0.52 and 0.84, respectively). The number of steps and the ADL score appear to be useful, as is Enneking score.
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Affiliation(s)
- H Sugiura
- Orthopaedic Department, Nagoya University School of Medicine, Tsurumai 65, Showaku, Nagoya 466-8550, Japan
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40
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Itoh H, Yamamura S, Ware JA, Zhuang S, Mii S, Liu B, Kent KC. Differential effects of protein kinase C on human vascular smooth muscle cell proliferation and migration. Am J Physiol Heart Circ Physiol 2001; 281:H359-70. [PMID: 11406504 DOI: 10.1152/ajpheart.2001.281.1.h359] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Vascular smooth muscle cell (SMC) migration and proliferation contribute to intimal hyperplasia, and protein kinase C (PKC) may be required for both events. In this report, we investigated the role of PKC in proliferation and migration of SMC derived from the human saphenous vein. Activation of PKC by phorbol-12,13-dibutyrate (PDBu) or (-)-indolactam [(-)-ILV] increases SMC proliferation. Downregulation of PKC activity by prolonged incubation with phorbol ester or inhibition of PKC with chelerythrine in SMC diminished agonist-stimulated proliferation. In contrast, stimulation of PKC with PDBu or (-)-ILV inhibited basal and agonist-induced SMC chemotaxis. Moreover, downregulation of PKC or inhibition with chelerythrine accentuated migration. We postulated that the inhibitory effect of PKC on SMC chemotaxis was mediated through cAMP-dependent protein kinase (protein kinase A, PKA). In support of this hypothesis, we found that activation of PKC in SMC stimulated PKA activity. The cAMP agonist forskolin significantly inhibited SMC chemotaxis. Furthermore, the inhibitory effect of PKC on SMC chemotaxis was completely reversed by cAMP or PKA inhibitors. In search of the PKC isotype(s) underlying these differential effects of PKC in SMC, we identified eight isotypes expressed in human SMC. Only PKC-alpha, -beta I, -delta, and -epsilon were eliminated by downregulation, suggesting that one or more of these four enzymes facilitate the observed phorbol ester-dependent effects of PKC in SMC. In summary, we found that PKC activation enhances proliferation but inhibits migration of human vascular SMC. These differential effect of PKC on vascular cells appears to be mediated through PKC-alpha, -beta I, -delta, and/or -epsilon.
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Affiliation(s)
- H Itoh
- Division of Vascular Surgery, New York Hospital and Cornell University Medical Center, New York 10021, USA
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41
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Taniuchi S, Yamamura S, Tsuji S, Hasui M, Ohtani T, Nomura S, Kobayashi Y. A convenient method of granulocyte transfusion using a hydroxylethyl starch (HESPAN) containing a bag. Pediatr Hematol Oncol 2001; 18:299-301. [PMID: 11400657 DOI: 10.1080/088800101750238630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- S Taniuchi
- Department of Pediatrics, Kansai Medical University, Fumizonocho 10-15, Moriguchi, Osaka 570-8506, Japan.
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42
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Lu Y, Onda M, Uchida E, Yamamura S, Yanagi K, Matsushita A, Kobayashi T, Fukuhara M, Aida K, Tajiri T. The cytotoxic effects of bile acids in crude bile on human pancreatic cancer cell lines. Surg Today 2001; 30:903-9. [PMID: 11059730 DOI: 10.1007/s005950070042] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Pancreatic cancer frequently causes extrahepatic cholestasis. To identify the direct effects of bile acids in jaundiced serum on pancreatic cancer, the proliferation of PANC-1 and MIA PaCa-2 cells as well as the ultrastructural alteration of PANC-1 cells cultured in crude bile modified media were studied. The growth of these cells in the RPMI-1640 media with or without 1%, 2%, and 4% of the refined crude bile was assessed after 48 and 96 h of incubation. The ultrastructure of PANC-1 cells was investigated by scanning and transmission electron microscopy after 24 and 48 h of incubation. The proliferation of both cell lines in the bile-treated media was greatly inhibited. The inhibitory rates of bile on PANC-1 ranged from 24.1% +/- 3.3% to 66.9% +/- 6.6% (P < 0.01) and those on MIA PaCa-2 ranged from 16.7% +/- 3.8% to 50.7% +/- 5.5%. (P < 0.01). When the bile-added media were replaced, the cells were able to restore their proliferating ability. The PANC-1 cells incubated in the bile-supplied media indicated that the mirovilli, mitochondria, and other organelles had thus been injured. These results suggest that bile acids appear to inhibit the proliferation of PANC-1 and MIA PaCa-2 cells, and the probable inhibitory mechanism is mainly considered to be due to the cytotoxicity of such bile acids.
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Affiliation(s)
- Y Lu
- First Department of Surgery, Nippon Medical School, Tokyo, Japan
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43
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Ohno S, Tomita-Yokotani K, Kosemura S, Node M, Suzuki T, Amano M, Yasui K, Goto T, Yamamura S, Hasegawa K. A species-selective allelopathic substance from germinating sunflower (Helianthus annuus L.) seeds. Phytochemistry 2001; 56:577-581. [PMID: 11281135 DOI: 10.1016/s0031-9422(00)00416-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
From the exudate of germinating sunflower (Helianthus annuus L.) seeds was isolated a stereoisomer of diversifolide, 4, 15-dinor-3-hydroxy-1(5)-xanthene-12,8-olide (designated sundiversifolide) as determined by analysis of its IR, APCI-, ESI- and HR-MS and 13C and 1H NMR spectra. This substance inhibited shoot and root growth of cat's-eyes by about 50% at a concentration of 30 ppm. It also showed species-selective activity on the shoot and root growth of tested plants. When cat's-eyes seeds were incubated together with sunflower seeds, the cat's-eyes growth was inhibited. Furthermore, it was detected from an extract of river sand when sunflower seeds were incubated on the sand. These results indicate that sundiversifolide has an allelopathic function in sunflower plants.
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Affiliation(s)
- S Ohno
- College of Agrobiological Resources, University of Tsukuba, Ibaraki, Japan
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44
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Saitoh H, Kiba A, Nishihara M, Yamamura S, Suzuki K, Terauchi R. Production of antimicrobial defensin in Nicotiana benthamiana with a potato virus X vector. Mol Plant Microbe Interact 2001; 14:111-5. [PMID: 11204773 DOI: 10.1094/mpmi.2001.14.2.111] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A recombinant plasmid, pTXS.TH, was constructed to express the gene-encoding wasabi (Wasabia japonica) defensin with the potato virus X (PVX) vector. pTXS.TH allows the expression of defensin in the host Nicotiana benthamiana, and the defensin protein WT1 can be purified from virus-infected leaves by heat treatment and affinity chromatography. WT1 exhibits strong antifungal activity toward the phytopathogenic fungi Magnaporthe grisea (50% inhibitory concentration [IC50] = 5 microg/ml) and Botrytis cinerea (IC50 = 20 microg/ml) but is weakly active against the phytopathogenic bacterium Pseudomonas cichorii. This virus-mediated expression system is a rapid and efficient method to produce and characterize antimicrobial proteins in plants. It is particularly useful for the study of proteins that are difficult to produce with other expression systems.
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Affiliation(s)
- H Saitoh
- Iwate Biotechnology Research Center, Kitakami, Japan.
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45
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Yamamura S, Momose Y. Quantitative analysis of crystalline pharmaceuticals in powders and tablets by a pattern-fitting procedure using X-ray powder diffraction data. Int J Pharm 2001; 212:203-12. [PMID: 11165078 DOI: 10.1016/s0378-5173(00)00605-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A pattern-fitting procedure for quantitative analysis of crystalline pharmaceuticals in solid dosage forms using X-ray powder diffraction data is described. This method is based on a procedure for pattern-fitting in crystal structure refinement, and observed X-ray scattering intensities were fitted to analytical expressions including some fitting parameters, i.e. scale factor, peak positions, peak widths and degree of preferred orientation of the crystallites. All fitting parameters were optimized by the non-linear least-squares procedure. Then the weight fraction of each component was determined from the optimized scale factors. In the present study, well-crystallized binary systems, zinc oxide-zinc sulfide (ZnO-ZnS) and salicylic acid-benzoic acid (SA-BA), were used as the samples. In analysis of the ZnO-ZnS system, the weight fraction of ZnO or ZnS could be determined quantitatively in the range of 5-95% in the case of both powders and tablets. In analysis of the SA-BA systems, the weight fraction of SA or BA could be determined quantitatively in the range of 20-80% in the case of both powders and tablets. Quantitative analysis applying this pattern-fitting procedure showed better reproducibility than other X-ray methods based on the linear or integral intensities of particular diffraction peaks. Analysis using this pattern-fitting procedure also has the advantage that the preferred orientation of the crystallites in solid dosage forms can be also determined in the course of quantitative analysis.
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Affiliation(s)
- S Yamamura
- School of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, 274-8510, Chiba, Japan.
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Abstract
Fracture-dislocation of the tarsal navicular is rare injury because of strong ligamentous support on both its plantar and dorsal sides. The authors report a case of a twenty-five-year-old man who sustained bilateral isolated tarsal navicular fracture-dislocations, treated by open reduction and internal fixation combined with external fixation. The patient reported no difficulty in activities of daily living, but T1-weighted magnetic resonance imaging showed a low-intensity area in right tarsal navicular, raising suspicion of osteonecrosis when he was last seen two year three months after operation.
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Affiliation(s)
- N Yoshino
- Department of Orthopaedic Surgery, Kyoto Prefectural University of Medicine, Japan
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47
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Saito Y, Chaicharoenpong C, Ohno O, Ichikawa E, Yamamura S, Kato K, Nakamura M, Ohno T, Umezawa K. Synthesis and anti-HIV activity of unusual nucleoside oxanosine derivatives. Nucleic Acids Symp Ser 2000:19-20. [PMID: 10780358 DOI: 10.1093/nass/42.1.19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A series of the oxanosine and carbocyclic oxanosine derivatives were synthesized to evaluate for their anti-HIV activity. Compound 1, 7 and 9 showed weak anti-HIV activities.
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Affiliation(s)
- Y Saito
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Japan
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48
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Ichikawa E, Yamamura S, Kato K. Synthesis and biological activity of unusual nucleosides having 3,4-bis(hydroxymethyl) thietane ring as a sugar moiety. Nucleic Acids Symp Ser 2000:5-6. [PMID: 10780351 DOI: 10.1093/nass/42.1.5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The enantiomerically pure synthesis of 9-[(2'S, 3'S)-bis(hydroxymethyl)thietan-1'-yl]adenine 2,3'-thio analog of oxetanocin A, was achieved via coupling of silylated 6-chloropurine and sulfoxide 16 under Pummerer reaction conditions.
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Affiliation(s)
- E Ichikawa
- Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama, Japan
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49
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Hasegawa T, Yamada K, Kosemura S, Yamamura S, Hasegawa K. Phototropic stimulation induces the conversion of glucosinolate to phototropism-regulating substances of radish hypocotyls. Phytochemistry 2000; 54:275-279. [PMID: 10870181 DOI: 10.1016/s0031-9422(00)00080-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The distribution of natural growth inhibitors, the raphanusanins (isomers of 3-(methylthio)methylene-2-pyrrolidinethione) and their precursors (4-methylthio-3-butenyl glucosinolate (MTBG) and 4-methylthio-3-butenyl isothiocyanate (MTBI), between illuminated and shaded halves of radish hypocotyls during phototropic curvature was analyzed using a physicochemical assay. Phototropic stimulation rapidly decreased MTBG content, and abruptly increased contents of MTBI and raphanusanins in the illuminated halves of radish hypocotyls within 30 min after the onset of unilateral illumination. Content in the shaded halves was similar to that in dark controls. When MTBG, MTBI, and raphanusanins at endogenous levels were applied unilaterally to etiolated hypocotyls, MTBI and raphanusanins caused hypocotyls to bend but MTBG showed no activity. Blue illumination promoted myrosinase (thioglucosidase) activity, which releases MTBI from MTBG, in hypocotyls after 10 min, although enzyme activity in dark controls did not change. These results suggest that phototropic stimulation promotes myrosinase activity in the illuminated side of radish hypocotyls, releasing bioactive MTBI from inactive MTBG and simultaneously producing bioactive raphanusanins.
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Affiliation(s)
- T Hasegawa
- Institute of Applied Biochemistry, University of Tsukuba, Ibaraki, Japan
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50
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Ishikawa T, Matsusaka T, Wakasugi K, Tashiro H, Yanaga K, Yamamura S, Sonoda K, Kume K. [Efficacy of UFT in the treatment of para-aortic lymph node metastasis following gastric cancer surgery: case report]. Gan To Kagaku Ryoho 2000; 27:745-8. [PMID: 10832445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
The patient was a 68-year-old man who underwent pyloric gastrectomy for advanced stomach cancer on December 6, 1996. The histopathological diagnosis was poorly differentiated adenocarcinoma, ss, ly3, v1, n2 (+), and stage IIIa. Postoperative adjuvant chemotherapy consisted of short-term intravenous infusion of 5-FU, 320 mg/m2/day (= 480 mg/body) for 5 days beginning on postoperative day (POD) 1, and oral 5-FU, 200 mg/day, for 1 year beginning on POD 14. The preoperative CEA value was 316.2 ng, but it fluctuated below 10 ng postoperatively. About one year after the operation, the patient began to complain of epigastric pain, loss of appetite, and general malaise. CT of the upper abdomen revealed a 1.5-cm para-aortic lymph node, and the CEA value of 319.0 ng was abnormally high. 5-FU was stopped, oral UFT at 300 mg/day was started, and the patient's course was followed. Three months after the start of UFT, the lymph node had shrunk on CT (shrinkage rate: 66.7%), and the CEA value had decreased to 14.3 ng. As though corresponding to these changes there was a gradual decrease in the epigastric pain, general malaise, etc., and the patient's appetite also returned. There were no subsequent elevations in the CEA values or increases in the size of the para-aortic lymph nodes, and the patient's general condition was favorably maintained. UFT appeared to be effective against the lymph node metastasis around the aorta in this case.
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Affiliation(s)
- T Ishikawa
- Dept. of Surgery, Matsuyama Red Cross Hospital
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