Abstract:
:In the present study, we report that the betel quid ingredient catechu, its extract and pure principle catechin were nonmutagenic in Salmonella typhimurium TA 100, TA 1535, TA 98, and TA 1538 assays with or without metabolic activation. They also exhibited dose-dependent decreases in mutagenicity of benzo(a)pyrene [B(a)P] and dimethylbenz(a)anthracene (DMBA) in strain TA 98 with metabolic activation. We further report that these compounds inhibited activities of cytochrome P-450 and had no effect on glutathione-S-transferase but increased the glutathione content in rat liver tissue. Simultaneous treatment of catechin prevented the mutagenic activity of B(a)P and DMBA metabolites in strain TA 98 in the absence of metabolic activation. Pre- and post-treatment of bacteria with catechin had no effect on the mutagenicity of B(a)P and DMBA metabolites. Catechin also inhibited the in vitro binding of 3H-B(a)P metabolites to calf thymus DNA. Catechu extract and catechin inhibited the nitrosation of methylurea by nitrite at pH 3.6 and 30 degrees C. The formation of nitrosomethylurea in the reaction mixture was monitored by measuring the histidine revertants of strain TA 1535 in the absence of metabolic activation. Pre- and post-treatment of catechu extract or catechin had no effect on the mutagenicity of nitrosomethylurea in TA 1535. The nitrosation inhibition by catechin was through scavenging of nitrite observed at pH 3.6. The above study indicates that catechu in betel quid may act as an antimutagen and may suppress the mutagenic potential of other betel quid mutagens.
journal_name
J Cancer Res Clin Oncoljournal_title
Journal of cancer research and clinical oncologyauthors
Nagabhushan M,Maru GB,Amonkar AJ,Nair UJ,Santhanam U,Ammigan N,D'Souza AV,Bhide SVdoi
10.1007/BF00417833subject
Has Abstractpub_date
1988-01-01 00:00:00pages
177-82issue
2eissn
0171-5216issn
1432-1335journal_volume
114pub_type
杂志文章abstract:PURPOSE:To analyse hepcidin serum and urine levels during radiotherapy for prostate cancer. METHODS:In 18 patients undergoing radiotherapy for prostate cancer, blood, plasma, and urine samples were taken before and during radiotherapy. Complete blood cell count, pro-hepcidin-, ferritin-, transferrin-, IL-1beta-, IL-6-...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-006-0170-0
更新日期:2007-05-01 00:00:00
abstract:PURPOSE:In our previous publication, we have shown that dihydroartemisinin could significantly inhibit the growth of CML K562 cells by its anti-proliferative and inducing apoptotic effects. Given the pivotal effect of Bcr/Abl tyrosine kinase and its downstream signal factors on CML cell proliferation and survival, we e...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-012-1292-1
更新日期:2012-12-01 00:00:00
abstract::Female wistar rats were fed on an Mg-deficient diet. After 8 to 10 weeks, the thymus glands were strongly degenerated and the number of lymphocytes was reduced, especially in the cortex. Thymus degeneration was associated with a decreased rate of DNA, RNA, and protein biosynthesis and necrosis and phagocytosis of lymp...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF00402054
更新日期:1982-01-01 00:00:00
abstract:PURPOSE:Cancer stem cells (CSCs) represent a population with tumour-initiating, self-renewal, and differentiation potential. This study aimed to evaluate the expression patterns and clinical significance of chemokine receptor type 4 (CXCR4) as a novel CSC marker in renal cell carcinoma (RCC). METHODS:The expression of...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-016-2239-8
更新日期:2017-01-01 00:00:00
abstract:PURPOSE:Based on the poor prognosis of drug resistance in pediatric acute lymphoblastic leukemia (ALL) and adverse effects of chemotherapy, this study was aimed to evaluate the effect of several herbal extracts on leukemic cells. METHODS:Two subtypes of T- and B-ALL cell lines, followed by ALL primary cells were treat...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-019-02949-5
更新日期:2019-08-01 00:00:00
abstract:BACKGROUND:Within hypoxic tumor regions anaerobic dissimilation of glucose is the sole source of energy generation. It yields only 5% of the ATP that is normally gained by means of oxidative glucose catabolism. The increased need for glucose may aggravate cancer cachexia. We investigated the impact of recombinant human...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-003-0526-7
更新日期:2004-04-01 00:00:00
abstract:PURPOSE:A growing body of evidence has shown the possible relevance of survivin -31G>C (rs9904341) promoter polymorphism to the genetic susceptibility of cancer. Because of the lack of available conclusive data, we performed a meta-analysis of all relevant available studies to derive a more precise estimation of the re...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章,评审
doi:10.1007/s00432-013-1524-z
更新日期:2014-02-01 00:00:00
abstract::Reversal of natural resistance to bouvardin (NSC 259968) has been attained in vitro and in vivo, by the calcium influx blocker verapamil in sarcoma 180 cells insensitive to bouvardin. Verapamil increased the in vitro lethality of the tumor cells following exposure with cells for 1 and 3 h as a result of the cytotoxic ...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF00399277
更新日期:1985-01-01 00:00:00
abstract::Coumarin (1,2-benzopyrone) is a natural substance that has shown antitumor activity in vivo. The major human metabolite of coumarin, 7-hydroxycoumarin (7-HC), is the active form of the drug. While the exact mechanism(s) of action of coumarin is unknown, it has been shown previously that this drug possesses immunomodul...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF01377114
更新日期:1994-01-01 00:00:00
abstract::The association of Epstein-Barr virus (EBV) with gastric medullary carcinoma with lymphoid infiltration (GMCL) was investigated. The presence of GMCL exhibited a 2/1 male-to-female ratio and a 1/2 early-to-advanced cancer ratio, predominantly located in the cardia and corpus of the stomach (90%). The presence of EBV D...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF01236388
更新日期:1994-01-01 00:00:00
abstract:PURPOSE:To evaluate the pattern of recurrence of breast cancer according to its biological subtype in a large cohort of patients treated with therapy representative of current practice. PATIENTS AND METHODS:Patients treated between 2000 and 2016 with known biological subtype were eligible. Data were prospectively coll...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-018-2644-2
更新日期:2018-07-01 00:00:00
abstract:PURPOSE:The epithelial cell adhesion molecule (Ep-CAM) is a clinically validated target for antibody-based therapy of cancer. The aim of this work was to evaluate the specific cytotoxic activity of a novel fully human Ep-CAM-specific IgG1 antibody, called MT201, against primary ovarian tumor cells and an ovarian tumor ...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-003-0438-6
更新日期:2003-06-01 00:00:00
abstract::Preoperative cytologic examinations were performed on bronchial material from 92 patients with postsurgical (pathologic) stage I (American Joint Committee) adenocarcinoma of the lung. All patients were followed up for at least 5 years or until death; thus, cases of adenocarcinoma metastatic to the lungs were virtually...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF00389247
更新日期:1986-01-01 00:00:00
abstract::The study shows inhibition of the antitumor effect of cyclophosphamide (CPA) on mammary carcinomas growing in mice prior-immunized by intragastric inoculations of the tumor. Immunization with tumor cells through this route produces under certain conditions factors able to modulate the antigenic determinants on tumor c...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF00411282
更新日期:1980-01-01 00:00:00
abstract:PURPOSE:Mucosal inflammation in the small intestine is a potentially hazardous side effect of abdominal irradiation. In an effort to develop a quantitative method of evaluating mucosal damage, the luminal release of brush border enzymes in response to ionizing radiation was examined using two investigational strategies...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s004320000174
更新日期:2001-02-01 00:00:00
abstract:PURPOSE:Protein inhibitors of activated STATs (PIAS) regulate the interferon-gamma (IFN-gamma) signaling pathway, which has numerous effects on tumor development and tumor cell biology. PIAS's also regulate STAT family members not directly involved in IFN-gamma signaling. This project was designed to assess PIAS1 expre...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-009-0570-z
更新日期:2009-09-01 00:00:00
abstract:PURPOSE:We compared laparoscopic approach with the conventional laparotomy approach for the treatment of patients with endometrial carcinoma in developing country. METHODS:Two hundred and seventy-two patients with endometrial carcinoma were enrolled in a prospective randomized trial and treated with laparoscopic or la...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00432-013-1504-3
更新日期:2013-11-01 00:00:00
abstract:PURPOSE:Survivin, an inhibitor of apoptosis protein and a cell cycle regulator, has been detected in the majority of human cancers. Five splice variants (survivin, survivin-2alpha, survivin-2B, survivin-3B, and survivin-DeltaEx3) have been identified; their expressions have been investigated here. METHODS:By means of ...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-008-0433-z
更新日期:2009-01-01 00:00:00
abstract:PURPOSE:The majority of patients with germ cell tumors are cured by multimodality therapy that consists of cisplatin-based chemotherapy and/or surgical resection. Serum tumor markers and conventional radiographs are utilized to stratify patients into treatment categories. Efforts to individualize chemotherapy or minimi...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s004320050026
更新日期:2000-03-01 00:00:00
abstract:AIM:To study the role of beta-catenin gene mutation and expression in hepatocellular carcinogenesis. METHOD:Thirty-four hepatocellular carcinoma (HCC) specimens and adjacent para-cancerous tissues, and four normal liver tissues were analyzed. Subcellular distribution of beta-catenin was examined by immunohistochemistr...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s004320100259
更新日期:2001-09-01 00:00:00
abstract:PURPOSE:The aim of this study was to investigate whether IL-12A, IL-12B, IL-12Rβ1, and IL-27 gene polymorphisms and serum levels of IL-12, IL-27 are associated with esophageal cancer. METHODS:We genotyped IL-12A gene rs568408, IL-12B gene rs3212227, IL-12Rβ1 gene 378 C/G, IL-27 gene rs153109, rs17855750, and rs181206 ...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-012-1269-0
更新日期:2012-11-01 00:00:00
abstract::A series of 191 female breast carcinomas (with long-term follow-up) were analysed immunohistochemically (with a monoclonal MIB1 antibody) for Ki-67 (a proliferation marker) expression with special reference to well-established prognostic factors and patient survival. Expression of Ki-67 was directly related to the S-p...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF01209033
更新日期:1996-01-01 00:00:00
abstract::To investigate further the presence of an autocrine proliferative loop involving gastrin in colorectal carcinomas and to clarify the receptor responsible, 102 human colorectal carcinomas and 10 hepatic metastases were investigated for the expression of the genes encoding gastrin, the gastrin/CCK-B receptor and the gas...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF01218524
更新日期:1995-01-01 00:00:00
abstract:PURPOSE:The purposes of our study were to elucidate the role of BRG1 in the development of human glioma and to determine the effect of BRG1 on glioma cell growth, migration and invasion. METHODS:Using tissue microarray and immunohistochemistry, we evaluated BRG1 staining in 190 glioma tissues, 8 normal brain tissues a...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-012-1172-8
更新日期:2012-06-01 00:00:00
abstract::The aim of the present studies was to elucidate the effects and optimal modulatory conditions of 5-ethyl-2'-deoxyuridine (EtdUrd) on the antitumour efficacy, pharmacokinetics and catabolism of 5-fluorouracil (5-FU) on Colon-26 and Colon-38 murine tumours. HPLC and GC-MS techniques were used to measure the concentratio...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s004320050333
更新日期:1999-12-01 00:00:00
abstract:PURPOSE:The gold standard of axillary sentinel lymph node biopsy (SLNB) in breast cancer is the combination of radioactive colloid and blue dye injection. Worldwide, numerous hospitals without access to radioactive tracers still perform a routine complete axillary lymph node dissection (ALND). We retrospectively analyz...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-007-0333-7
更新日期:2008-06-01 00:00:00
abstract::Extracts from mistletoe (Viscum album L.) are assumed to exert an antineoplastic activity through their toxicity at high doses or by immunomodulation by nanogram quantities of a lectin. They are used as an unconventional therapy modality in the management of a wide range of cancer diseases, although no anticancer pote...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s004320050138
更新日期:1998-01-01 00:00:00
abstract:BACKGROUND:Osteosarcoma (OS) is the most common primary malignant tumor of bone in children and adolescents. However, few biomarkers of diagnostic significance have been established. In recent years, high-throughput transcriptomic and metabolomic approaches make it possible for studying the levels of thousands of bioma...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-014-1719-y
更新日期:2014-10-01 00:00:00
abstract:PURPOSE:To assess risk factors of patients with oropharyngeal squamous cell carcinoma in the Munich area of Southern Germany in relation to human papillomavirus (HPV) association of the tumors. To demonstrate differences in tumor characteristics and their impact on adjuvant treatment. METHODS:Between November 2010 and...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-014-1631-5
更新日期:2014-06-01 00:00:00
abstract:BACKGROUND:Triple negative breast cancer (TNBC) harbors a heterogeneous group of carcinomas with poor prognosis and high genetic variability. As a potential aim for targeted therapy, genetic mutations leading to an activation of the phosphoinositide 3-kinase pathway in a catalytic subunit (PIK3CA) in breast cancer have...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-019-02968-2
更新日期:2019-08-01 00:00:00