101
|
Ishiko T, Taguchi T, Takeguchi M, Saito H, Nanri K. [Case of Wernicke's encephalopathy and subacute combined degeneration of the spinal cord due to vitamin deficiency showing changes in the bilateral corpus striatum and cardiac arrest due to beriberi heart disease]. BRAIN AND NERVE = SHINKEI KENKYU NO SHINPO 2009; 61:1069-1073. [PMID: 19803406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A 52-year-old woman was admitted to the hospital because of appetite loss, unsteadiness, psychogenic symptoms, ataxia, and consciousness disturbance as a result of the ingestion of a diet restricted to only carbohydrates for a long term. Laboratory examination indicated the presence of pancytopenia with macrocytic anemia; further, decreased vitamin B1 and B12 levels were detected in her serum. Magnetic resonance imaging fluid attenuated inversion recovery (FLAIR), revealed high-signal intensity in the bilateral corpus striatum, third ventricle circumference, and cerebellar cortex. Thereafter, she received drip infusion that did not include vitamin B1 or B12 and subsequently suffered a cardiac arrest due to the aggravation of cardiac insufficiency; consequently, she was transferred to our hospital. Upon admission the patient was diagnosed to have obvious cardiomegaly with pleural effusion; further, a negative T-wave was obtained on the electrocardiogram. A diagnosis of beriberi heart disease was made because of thiamine deficiency. She was treated by thiamine administration, following which the cardiac symptoms improved immediately. Various neurological symptoms caused by encephalopathy, peripheral neuropathy and subacute combined spinal cord degeneration improved by treatment with thiamine and cyanocobalamine administration; however, some of these symptoms still remained. General awareness of the fact that neurological symptoms can be caused by vitamin deficiency is essential.
Collapse
|
102
|
Nakayama T, Masuda N, Yamamura J, Kamigaki S, Taguchi T, Hatta M, Sakamoto J. Phase I study of combination therapy with weekly paclitaxel and cyclophosphatamide for advanced or recurrent breast cancer. Breast Cancer Res 2009. [PMCID: PMC4284903 DOI: 10.1186/bcr2300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
103
|
Nakao R, Matuo Y, Mishima F, Taguchi T, Nishijima S. Study on magnetic separation of nanosized ferromagnetic particles. ACTA ACUST UNITED AC 2009. [DOI: 10.1088/1742-6596/156/1/012032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
104
|
Shimazu K, Tamaki Y, Taguchi T, Noguchi S. 0176 Sentinel lymph node biopsy for patients with breast cancer treated with neoadjuvant chemotherapy. Breast 2009. [DOI: 10.1016/s0960-9776(09)70199-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|
105
|
Nanri K, Otsuka T, Takeguchi M, Taguchi T, Ishiko T, Mitoma H, Koizumi K. [A case of anti-gliadin-antibody-positive cerebellar ataxia effectively treated with intravenous immunoglobulin in which voxel-based morphometry and FineSRT were diagnostically useful]. Rinsho Shinkeigaku 2009; 49:37-42. [PMID: 19227895 DOI: 10.5692/clinicalneurol.49.37] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We present the case of a 51-year-old man with a 5-year history of slowly progressive gait ataxia and dysarthria who showed a wide-based gait requiring assistance. The patient's score on the Revised Hasegawa Dementia Scale (HDS-R) was 22/30 and constructional apraxia was also evident. Cerebrospinal fluid analysis showed 3 cells/microl, and the protein concentration was 58 mg/dl. Brain MRI showed no evidence of cerebellar atrophy, and SPECT-eZIS showed no decrease in cerebellar blood flow. However, voxel based morphometry (VBM) and FineSRT revealed cortical cerebellar atrophy and reduced cerebellar blood flow. In addition, the patient tested positive for anti-gliadin (IgA) and anti-SS-A/Ro antibodies, and was thus diagnosed as having autoimmune cerebellar ataxia. The patient showed positive response to intravenous immunoglobulins (IVIg) and regained the ability to walk unassisted. The HDS-R score also improved to 27/30. If cortical cerebellar atrophy can be diagnosed in the early stages in patients with progressive cerebellar ataxia by imaging techniques such as MRI-VBM and FineSRT, and if such patients test positive for anti-gliadin, anti-GAD or anti-thyroid antibodies, it is possible that they have autoimmune cerebellar ataxia. The commencement of immunotherapy including IVIg should be considered in such
Collapse
|
106
|
Masuda N, Nakayama T, Matsunami N, Kashiwaba M, Kamigaki S, Yamamura J, Anami S, Takeda M, Yasumura Y, Taguchi T. Phase II trial of neoadjuvant 5-fluorouracil, epirubicin and cyclophosphamide (FEC100) followed by weekly paclitaxel and trastuzumab (PH) for HER2 positive breast cancer (Kinki Multidisciplinary Breast Oncology Group; KMBOG-0402). Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-3160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Abstract #3160
Background: Achievement of pathological complete response (pCR) by primary systemic chemotherapy (PST) correlates with improved disease-free survival in operable breast cancer patients. Based on data of the higher pCR rate with concomitant chemotherapy and trastuzumab (H) presented by the randomized prospective trial (Buzdar AU, et al: JCO 23:3676-85; 2005), we performed a multi-center, prospective phase II study to assess the addition of H to primary systemic chemotherapy in HER2+ pts in Japan.
 Methods: Generally, the concomitant combination therapy with anthracycline-containing regimens and H is not recommended because of the increasing rate of cardiac toxicity. This study was designed to evaluate the efficacy and safety of PST for the operable breast cancer with HER2+ phenotype. PST is the sequential chemotherapy with 4 cycles of FEC100 followed by 12 times in combination with weekly paclitaxel (P) 80mg/m2 and H 2mg/kg (PH x 12).. The inclusion criteria is pts with histopathologically confirmed invasive breast carcinoma, T1-3N+M0/T2-3N0M0, HER2 positive by FISH or immunohistochemistry (IHC) 3+, PS=0-1, adequate hematologic, renal, hepatic and cardiac function and a written informed consent. The study was designed to detect a pCR rate of >43% in at least 42 pts. The evaluation of pathological response was carried out on all the surgical specimens sliced every 5 mm interval.
 Results: From Dec 2004 to Dec 2007, 43 pts were enrolled. Pre-reviewed data is now available for all pts: median age 56 [26-75 years]; 15 (35%) pre-menopausal; median clinical tumor size 40 mm [15-80]; 14 (33%) were ER-positive phenotype. All pts had a normal cardiac function before entry and after FEC→PH. No episodes of serious adverse events were reported. Febrile neutropenia was observed on 5 pts (12%). Grade 2 or 3 neuropathy was limited to 4 pts (9%). Other grade 3 non-hematological toxicities were not observed. Two pts requested to stop the treatment with P after 6 times of infusion because of neuropathy, edema and hyperpigmentation on the face, however, they had completed 12 times of H infusion. After PST, breast conservative surgery was done in 38 patients (88%) and mastectomy in 5 (12%). The overall pCR rate was 60% (26/43), and 6 of 26 pts had only component of DICS.
 Conclusions: In HER2+ pts, PST with FEC100x4 followed by PHx12 was active and promising, achieving high pathological complete response without significant toxicity.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 3160.
Collapse
|
107
|
Nishizawa Y, Tomimori R, Tawa K, Kiyosue K, Taguchi T, Nakaoki T. The Detection of Antigen-Antibody Recognition on an Array Chip by Surface Plasmon Field-Enhanced Fluorescence Imaging (SPFI). ACTA ACUST UNITED AC 2009. [DOI: 10.14723/tmrsj.34.213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
108
|
Nanri K, Okita M, Takeguchi M, Taguchi T, Ishiko T, Saito H, Otsuka T, Mitoma H, Koizumi K. Intravenous immunoglobulin therapy for autoantibody-positive cerebellar ataxia. Intern Med 2009; 48:783-90. [PMID: 19443972 DOI: 10.2169/internalmedicine.48.1802] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE It has been reported that autoimmune cerebellar ataxias, such as anti-glutamic acid decarboxylase (GAD)-antibody-positive cerebellar ataxia and gluten ataxia, are treatable. Here, we examined the therapeutic efficacy of intravenous immunoglobulin (IVIg) on autoantibody-positive cerebellar ataxia. PATIENTS AND METHODS IVIg therapy was administered in seven autoantibody-positive cerebellar ataxia patients. Therapeutic efficacy was examined in terms of its effects on clinical symptoms and changes in brain perfusion using single photon emission computed tomography (SPECT). RESULTS Treatment was effective in four cerebellar cortical atrophy patients (two anti-GAD antibody-positive and two anti-gliadin antibody-positive) and in one anti-thyroid antibody-positive spinocerebellar ataxia type 3 (SCA3) patient, but not in two multiple system atrophy (MSA) patients. All four IVIg effective patients who underwent SPECT showed apparent increases in cerebellar perfusion. CONCLUSION If cerebellar ataxia with an autoimmune mechanism is suspected and radiological findings do not reveal MSA, it is worth considering immunotherapy including IVIg.
Collapse
|
109
|
Miwa I, Chen AS, Taguchi T. Glyceraldehyde is present in rat lens and its level is increased in diabetes mellitus. Ophthalmic Res 2008; 41:98-101. [PMID: 19122471 DOI: 10.1159/000187626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2007] [Accepted: 10/27/2007] [Indexed: 11/19/2022]
Abstract
PURPOSE OP-lysine, a glycation product of lysine residues of proteins, has been reported to be formed with glyceraldehyde and glycolaldehyde as precursors in the lens, and has been suggested to play a role in senile cataracts. However, there has been no reliable information regarding the content of glyceraldehyde in tissues. This study determined the glyceraldehyde levels in the lenses of normal and diabetic rats. METHODS Glyceraldehyde was derivatized to a fluorescent compound, and the compound was then quantified by high-performance liquid chromatography. RESULTS The lens glyceraldehyde levels in normal and diabetic rats were 0.75 +/- 0.06 and 1.26 +/- 0.21 nmol/g wet weight (means +/- standard deviations of 6 animals, p < 0.01), respectively. Isolated rat lenses accumulated a higher level of glyceraldehyde when cultured for 6 days in 25.5 mM glucose than when cultured in 5.5 mM glucose. CONCLUSIONS Glyceraldehyde was found to be present in the lens and was increased in diabetes mellitus. OP-lysine is thus likely to be a potential risk factor for senile and diabetic cataracts.
Collapse
|
110
|
Muramatsu K, Ihara K, Kato Y, Yoshida Y, Taguchi T. Intrasacral schwannoma: clinical presentation, diagnosis and management. Br J Neurosurg 2008; 22:790-2. [PMID: 19085364 DOI: 10.1080/02688690802108798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Intrasacral schwannoma is a very rare lesion. We report here three cases of intrasacral schwannoma originating within the sacrum and discuss their clinical presentation, diagnosis and management. Complete excision would appear to be the treatment of choice, but conservative treatment is an option provided the tumour causes no serious symptoms.
Collapse
|
111
|
DeLuca S, Sitara D, Kang K, Marsell R, Jonsson K, Taguchi T, Erben RG, Razzaque MS, Lanske B. Amelioration of the premature ageing-like features of Fgf-23 knockout mice by genetically restoring the systemic actions of FGF-23. J Pathol 2008; 216:345-55. [PMID: 18729070 DOI: 10.1002/path.2409] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Genetic ablation of fibroblast growth factor 23 from mice (Fgf-23(-/-)) results in a short lifespan with numerous abnormal biochemical and morphological features. Such features include kyphosis, hypogonadism and associated infertility, osteopenia, pulmonary emphysema, severe vascular and soft tissue calcifications, and generalized atrophy of various tissues. To determine whether these widespread anomalies in Fgf-23(-/-) mice can be ameliorated by genetically restoring the systemic actions of FGF-23, we generated Fgf-23(-/-) mice expressing the human FGF-23 transgene in osteoblasts under the control of the 2.3 kb alpha1(I) collagen promoter (Fgf-23(-/-) /hFGF-23-Tg double mutants). This novel mouse model is completely void of all endogenous Fgf-23 activity, but produces human FGF-23 in bone cells that is subsequently released into the circulation. Our results suggest that lack of Fgf-23 activities results in extensive premature ageing-like features and early mortality of Fgf-23(-/-) mice, while restoring the systemic effects of FGF-23 significantly ameliorates these phenotypes, with the resultant effect being improved growth, restored fertility, and significantly prolonged survival of double mutants. With regard to their serum biochemistry, double mutants reversed the severe hyperphosphataemia, hypercalcaemia, and hypervitaminosis D found in Fgf-23(-/-) littermates; rather, double mutants show hypophosphataemia and normal serum 1,25-dihydroxyvitamin D(3) levels similar to pure FGF-23 Tg mice. These changes were associated with reduced renal expression of NaPi2a and 1 alpha-hydroxylase, compared to Fgf-23(-/-) mice. FGF-23 acts to prevent widespread abnormal features by acting systemically to regulate phosphate homeostasis and vitamin D metabolism. This novel mouse model provides us with an in vivo tool to study the systemic effects of FGF-23 in regulating mineral ion metabolism and preventing multiple abnormal phenotypes without the interference of native Fgf-23.
Collapse
|
112
|
Taguchi T, Yamamoto H, Shamoto S. The synthesis and structure of suspended ultra-thin Si(3)N(4) nanosheets. NANOTECHNOLOGY 2008; 19:485601. [PMID: 21836302 DOI: 10.1088/0957-4484/19/48/485601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Suspended Si(3)N(4) nanosheets at least 4 µm in width and ranging from 1.5 to 4 nm in thickness were successfully synthesized for the first time. Several of those nanosheets had scrolled edges due to being ultra-thin. According to transmission electron microscopy (TEM) and atomic force microscopy (AFM) observations, the Si(3)N(4) nanosheets exhibit microscopic corrugations in the range of several tens of nanometres. In addition, the directions of the microscopic corrugations were not random, but instead parallel to specific crystal orientations.
Collapse
|
113
|
Tatsuta K, Tanaka S, Tajiri T, Shibata S, Komaru A, Ueda Y, Inoue M, Hasegawa M, Suita S, Sueishi K, Taguchi T, Yonemitsu Y. Complete elimination of established neuroblastoma by synergistic action of γ-irradiation and DCs treated with rSeV expressing interferon-β gene. Gene Ther 2008; 16:240-51. [DOI: 10.1038/gt.2008.161] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
114
|
Hosoya Y, Taguchi T, Arita S, Tay FR. Clinical evaluation of polypropylene glycol-based caries detecting dyes for primary and permanent carious dentin. J Dent 2008; 36:1041-7. [PMID: 18938022 DOI: 10.1016/j.jdent.2008.08.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 08/29/2008] [Accepted: 08/29/2008] [Indexed: 10/21/2022] Open
Abstract
OBJECTIVE The aim of this study was to compare the clinical efficacy of new caries detecting dye Caries Check Blue (CCB) with Caries Check (CC) and Caries Detector (CD) using a laser fluorescence device (DIAGNOdent). METHOD Primary and permanent teeth with dentin caries were stained with polypropylene glycol (MW=300) based new caries detecting dyes CCB, CC, or propylene glycol (MW=76) based CD. In the CCB and CC groups, stained dentin was completely removed. In the CD groups, pink-stained dentin was retained according to the manufacturers' instructions. Cavities before and after caries removal were measured with the DIAGNOdent. Data were analyzed using ANOVA and Fisher's PLSD multiple comparison test at alpha=0.05. Regression analyses were performed between DIAGNOdent readings and scores obtained from the clinical parameters. RESULTS The DIAGNOdent readings after caries removal were: primary-CCB (13.2+/-10.4), primary-CC (14.3+/-16.7), primary-CD (9.0+/-5.2), permanent-CCB (22.7+/-13.4), permanent-CC (10.6+/-6.8) and permanent-CD (9.7+/-9.0). Significant differences were identified between the permanent-CCB and all other groups. Correlation coefficients between DIAGNOdent readings and clinical parameters were low. CONCLUSIONS When dentin stained with Caries Check Blue or Caries Check was completely removed, the DIAGNOdent readings were higher than those recorded when palely-stained pink dentin was retained with the Caries Detector, with significant difference observed for the permanent-CCB group. Caries Check Blue may be used clinically to avoid excessive removal of caries-affected or sound dentin in permanent teeth but not in primary teeth.
Collapse
|
115
|
Nishioka H, Taguchi T, Nanri K, Ikeda Y. Transient hemiballism caused by a small lesion of the subthalamic nucleus. J Clin Neurosci 2008; 15:1416-8. [PMID: 18842415 DOI: 10.1016/j.jocn.2007.05.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2007] [Revised: 05/28/2007] [Accepted: 05/29/2007] [Indexed: 11/19/2022]
Abstract
Hemiballism is most commonly caused by ischemic stroke and most cases have a favorable prognosis. Lesions directly involving the subthalamic nucleus (STN) are the cause of a minority of cases but are usually associated with poor prognosis. We report two patients with a small STN lesion who presented with transient hemiballism. A small lesion confined to and only focally affecting the STN may cause hemiballism yet may have excellent outcome. Precise evaluation of the affected region with MRI is useful in predicting the prognosis.
Collapse
|
116
|
Onimaru Y, Tsukasaki K, Murata K, Imaizumi Y, Choi YL, Hasegawa H, Sugahara K, Yamada Y, Hayashi T, Nakashima M, Taguchi T, Mano H, Kamihira S, Tomonaga M. Autocrine and/or paracrine growth of aggressive ATLL cells caused by HGF and c-Met. Int J Oncol 2008; 33:697-703. [PMID: 18813782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
Adult T-cell leukemia/lymphoma (ATLL) is a neoplasia characterized by the massive invasion of various organs by tumor cells. Previously, we found that expression of the gene for c-Met, a receptor tyrosine kinase for hepatocyte growth factor (HGF), was specific to the acute type among 41 patients with ATLL by microarray. First in the present study, we analyzed the survival of the patients in relation to expression of c-Met and HGF in ATLL cells. Expression of the former but not the latter was associated with poor prognosis. Then, we analyzed the growth of ATLL cells caused by HGF and c-Met. c-Met was expressed in 0/7 chronic ATLLs, 12/14 acute ATLLs, 1/1 IL-2-independent ATLL cell line and 1/7 IL-2-dependent ATLL cell lines as assessed by flow cytometry. HGF induced the proliferation of primary cells from most acute cases examined as well as the c-Met-positive KK1 cell line in contrast to c-Met-negative cells. HGF induced autophosphorylation of c-Met in c-Met-positive cells from an acute case and KK1 cells. The plasma level of HGF was elevated in acute as compared to chronic cases. The levels of HGF and/or IL-6 which induces the production of HGF by stromal cells, were elevated in the supernatant of short-term cultured cells from certain patients with acute or chronic disease. Finally, infiltrated ATLL cells and adjacent stromal cells in liver were shown to be positive for c-Met/HGF and HGF, respectively, in acute cases. Autocrine and/or paracrine growth caused by HGF and c-Met was suggested in aggressive ATLL cells secreting HGF and/or IL-6, respectively.
Collapse
|
117
|
Taguchi T, Matsuo R, Mitsunaga T, Broennimann C, Eikenberry E. Novel pixel detector for in-house XRD applications. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308093860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
118
|
Igawa N, Taguchi T, Fukazawa H, Yamauchi H, Ishii Y, Utsumi W. Motion of inclusion gas molecules in clathrate hydrate observed by neutron powder diffraction. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308084997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
119
|
Shamoto S, Kodama K, Iikubo S, Taguchi T. Atomic pair distribution function analysis on nanomaterials. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308097651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
120
|
Cooley S, Dolbier W, Haufe G, Taguchi T, Winfield J. Emeritus Professor J.C. (Colin) Tatlow (1923–2008). J Fluor Chem 2008. [DOI: 10.1016/j.jfluchem.2008.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
121
|
Arai T, Miyoshi Y, Kim SJ, Akazawa K, Maruyama N, Taguchi T, Tamaki Y, Noguchi S. Association of GSTP1 expression with resistance to docetaxel and paclitaxel in human breast cancers. Eur J Surg Oncol 2008; 34:734-8. [PMID: 17764884 DOI: 10.1016/j.ejso.2007.07.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2007] [Accepted: 07/16/2007] [Indexed: 11/18/2022] Open
Abstract
AIMS It has been reported that glutathione S-transferase P1 (GSTP1) expression is implicated in resistance to taxanes (docetaxel and paclitaxel) in human breast cancer cells in vitro. In the study presented here, we examine whether GSTP1 expression is associated with resistance to docetaxel or paclitaxel in human breast cancers. We also investigated the relationship between GSTP1 methylation status and response to these taxanes. MATERIAL AND METHODS Sixty two primary breast cancer patients were treated with docetaxel or paclitaxel as primary systemic treatment (PST). GSTP1 expression was detected immunohistochemically and the hypermethylation status GSTP1 gene was identified with a methylation specific primer assay. RESULTS The mean tumor reduction rate for all patients (n=62) was significantly (p<0.001) higher in GSTP1 negative (0.73+/-0.04; mean+/-standard error) than GSTP1 positive (0.31+/-0.09) tumors. The subset analysis showed that the mean reduction rate was significantly (p=0.005) higher in GSTP1 negative (0.59+/-0.06) than GSTP1 positive (0.11+/-0.13) tumors in the docetaxel group as well as in the paclitaxel group (p=0.006; GSTP1 negative tumors: 0.84+/-0.05; GSTP1 positive tumors: 0.56+/-0.08). On the other hand, GSTP1 methylation showed no significant association with the reduction rate. CONCLUSION Our present study has suggested that GSTP1 protein expression, but not GSTP1 methylation status, might be associated with response to docetaxel and paclitaxel. This suggests that GSTP1 immunohistochemical expression might be a potentially clinically useful predictive factor for response to docetaxel and paclitaxel.
Collapse
|
122
|
Willems AR, Tahlan K, Taguchi T, Zhang K, Lee ZZ, Ichinose K, Junop MS, Nodwell JR. Crystal structures of the Streptomyces coelicolor TetR-like protein ActR alone and in complex with actinorhodin or the actinorhodin biosynthetic precursor (S)-DNPA. J Mol Biol 2008; 376:1377-87. [PMID: 18207163 DOI: 10.1016/j.jmb.2007.12.061] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2007] [Revised: 12/19/2007] [Accepted: 12/21/2007] [Indexed: 11/24/2022]
Abstract
Actinorhodin, an antibiotic produced by Streptomyces coelicolor, is exported from the cell by the ActA efflux pump. actA is divergently transcribed from actR, which encodes a TetR-like transcriptional repressor. We showed previously that ActR represses transcription by binding to an operator from the actA/actR intergenic region. Importantly, actinorhodin itself or various actinorhodin biosynthetic intermediates can cause ActR to dissociate from its operator, leading to derepression. This suggests that ActR may mediate timely self-resistance to an endogenously produced antibiotic by responding to one of its biosynthetic precursors. Here, we report the structural basis for this precursor-mediated derepression with crystal structures of homodimeric ActR by itself and in complex with either actinorhodin or the actinorhodin biosynthetic intermediate (S)-DNPA [4-dihydro-9-hydroxy-1-methyl-10-oxo-3-H-naphtho-[2,3-c]-pyran-3-(S)-acetic acid]. The ligand-binding tunnel in each ActR monomer has a striking hydrophilic/hydrophobic/hydrophilic arrangement of surface residues that accommodate either one hexacyclic actinorhodin molecule or two back-to-back tricyclic (S)-DNPA molecules. Moreover, our work also reveals the strongest structural evidence to date that TetR-mediated antibiotic resistance may have been acquired from an antibiotic-producer organism.
Collapse
|
123
|
Kim S, Nakayama S, Miyoshi Y, Taguchi T, Tamaki Y, Matsushima T, Torikoshi Y, Tanaka S, Yoshida T, Ishihara H, Noguchi S. Determination of the specific activity of CDK1 and CDK2 as a novel prognostic indicator for early breast cancer. Ann Oncol 2008; 19:68-72. [DOI: 10.1093/annonc/mdm358] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
124
|
Muramatsu K, Hashimoto T, Seto S, Gondo T, Ihara K, Taguchi T. Low-grade central osteosarcoma mimicking fibrous dysplasia: a report of two cases. Arch Orthop Trauma Surg 2008; 128:11-5. [PMID: 17203284 DOI: 10.1007/s00402-006-0280-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2006] [Indexed: 01/13/2023]
Abstract
Low-grade central osteosarcoma is an unusual variant of conventional osteosarcoma. We present here two rare cases of low-grade central osteosarcoma resembling fibrous dysplasia. A 24-year-old woman diagnosed as fibrous dysplasia was treated with intra-lesional excision and curettage of the tumor but tumor recurred at 4 months after surgery. Distal femoral en-bloc resection was performed followed by arthroplasty with mega-prosthesis of the knee. A 57-year-old man diagnosed as central osteosarcoma was treated with wide excision of the tumor, followed by reconstruction with the vascularized fibula graft combined with an autogenous irradiated bone graft. Because of the difficulty in distinguishing low-grade central osteosarcoma from a benign lesion, open biopsy is needed to obtain a large tumor sample. Careful clinical and pathological evaluation is required to obtain a definite diagnosis. The treatment of low-grade central osteosarcoma is en-block resection with wide surgical margins.
Collapse
|
125
|
Matsunaga T, Shigetomi M, Hashimoto T, Suzuki H, Gondo T, Tanaka H, Sugiyama T, Taguchi T. Effects of bisphosphonate treatment on bone repair under immunosuppression using cyclosporine A in adult rats. Osteoporos Int 2007; 18:1531-40. [PMID: 17492246 DOI: 10.1007/s00198-007-0387-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2006] [Accepted: 04/17/2007] [Indexed: 11/29/2022]
Abstract
UNLABELLED The effect of cyclosporine A on bone turnover remains unclear. Using adult rats with vascularized bone transplantation, we show that long-term cyclosporine A administration increases bone turnover and zoledronic acid treatment enhances the reconstruction of cyclosporine A-administered skeleton. Bisphosphonates might be efficacious in human bone repair under immunosuppression using cyclosporine A. INTRODUCTION Bisphosphonate treatment effectively prevents bone loss after transplantation. However, recent evidence from gain- and loss-of-function experiments has indicated that calcineurin inhibitors, such as cyclosporine A (CsA), reduce bone turnover, and severely suppressed bone turnover might delay the union of human fractured bone. The purpose of this study was to investigate the effects of bisphosphonate treatment on the repair of CsA-administered skeleton. METHODS After skeletal reconstruction by vascularized tibial grafting, adult recipient rats were treated with intramuscular CsA (10 mg/kg/day) and low-dose (0.2 microg/kg/week) or high-dose (2 microg/kg/week) subcutaneous zoledronic acid alone or in combination for 8 weeks. Biochemical parameters were measured in blood and urine. The reconstructed skeleton was analyzed using soft X-ray, histology, dual energy X-ray absorptiometry, and three-point bending test. RESULTS CsA induced mild renal dysfunction, hyperparathyroidism and high bone turnover. High-dose zoledronic acid delayed cortical bone union at the distal host-graft junction, but its combination with CsA did not cause such a delay. High-dose zoledronic acid prevented CsA-induced bone loss and bone fragility in the reconstructed skeleton. CONCLUSION In this rat model, long-term CsA administration increases bone turnover, at least partly, through hyperparathyroidism and high-dose zoledronic acid treatment does not impair the union of CsA-administered bone.
Collapse
|