Abstract:
BACKGROUND:Multidrug resistance (MDR) is one of the major obstacles limiting the efficacy of cancer chemotherapy. Through screening a series of natural products, we have previously identified six naturally occurring bisbenzylisoquinoline alkaloids (BBIs) that possess potent activity to reverse P-glycoprotein (gp)-mediated drug resistance. In this study, we characterized one of these compounds, termed tetrandrine, and evaluated its reversal activity on P-gp-mediated drug resistance to paclitaxel in vitro and in vivo. MATERIALS AND METHODS:Using the human MDR tumor cell line KBv200 and its drug sensitive parental cell line, the reversal activity of tetrandrine on P-gp-mediated resistance to paclitaxel and docetaxel were determined by MTT and other in vitro drug evaluation assays. Further, through establishment of xenograft models bearing the intrinsically resistant KBv200 tumor, we also examined the effect of tetrandrine on potentiating the antitumor activity of paclitaxel in vivo. RESULTS:In vitro studies showed that co-administration of tetrandrine at 2.5 microM, which has little cytotoxicity alone, reversed the sensitivity of KBv200 cells to paclitaxel and docetaxel around 10-fold. In vivo experiments also demonstrated that tetrandrine significantly potentiated the antitumor activity of paclitaxel in xenograft models bearing the intrinsically resistant KBv200 tumors. In addition, accumulation and efflux studies with [3H]-paclitaxel indicated that tetrandrine increases the intracellular accumulation of [3H]-paclitaxel in MDR cells through inhibition of P-gp-mediated drug efflux. CONCLUSION:The present in vitro and in vivo studies demonstrated that tetrandrine possesses potent and specific activity in reversing P-gp-mediated drug resistance. This naturally occurring compound may be used as a chemosensitizer in the treatment of P-gp-mediated MDR cancers.
journal_name
Anticancer Resjournal_title
Anticancer researchauthors
Zhu X,Sui M,Fan Wsubject
Has Abstractpub_date
2005-05-01 00:00:00pages
1953-62issue
3Beissn
0250-7005issn
1791-7530journal_volume
25pub_type
杂志文章abstract::Cancer patients suffer from cancer-induced bone pain, hypercalcemia, and reduced quality of life caused by pathological fractures. Many of these complications related to cancer can be treated, or at least controlled, using new anticancer agents. Recently, two agents used initially to treat osteoporosis demonstrated di...
journal_title:Anticancer research
pub_type: 杂志文章,评审
doi:
更新日期:2013-08-01 00:00:00
abstract::The cytosol hormone receptors were extracted from rabbit uteri and human tumors with tris buffer systems for three consecutive homogenization and centrifugation processes to obtain three cytosols C-1, C-2, and C-3. The assay results evaluated revealed that minimal to tremendous amounts of receptor activities were pres...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1985-07-01 00:00:00
abstract:BACKGROUND/AIM:We evaluated patients undergoing salvage hysterectomy after brachytherapy (BT) following concomitant chemoradiation (CRT) for locally advanced cervical cancers (LACC), when residual disease was suspected. PATIENTS AND METHODS:From 2004 to 2013, 29 patients had a radical hysterectomy at the Gustave Rouss...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.13421
更新日期:2019-06-01 00:00:00
abstract:BACKGROUND:Glioblastoma responds poorly to standard chemotherapy agents. The expression of a mutant, constitutively-active EGF receptor (EGFRvIII) is common in glioblastoma and contributes to chemotherapy resistance. We have assessed the cytotoxicity of an inhibitor of atypical protein kinase C on glioblastoma cells ex...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2002-03-01 00:00:00
abstract::Telomerase activity is associated with most malignant tumors. To evaluate the role of telomerase reactivation as a diagnostic and prognostic marker in oral carcinogenesis activity was investigated in mortal and immortal cell lines in eight oral leukoplakias (OL) and 46 oral squamous cell carcinomas (OSCC). Activity wa...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2001-03-01 00:00:00
abstract::It was the aim of this study to compare drug-resistant sublines of the murine P388 in relation to resistance markers, the resistant phenotype and immunogenicity. Resistance to drugs either belonging to the MDR type (Doxorubicin, Vincristine, Mitoxantrone) or to the non-MDR type (Methotrexate) was generated in vivo in ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1994-09-01 00:00:00
abstract::Sprague-Dawley male rats, 24 days of age, were placed on diets based on a balanced ration as such and supplemented with Brazilian A rabica green coffee bean oil (0.10%), silymarin flavonolignans (0.10%), porcine trypsin (2429 mu/g ration) and ferrous sulfate (0.24% Fe) for a period of 32 weeks. A portion of the contro...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1994-05-01 00:00:00
abstract:BACKGROUND/AIM:SATB2 (special AT-rich sequence-binding protein 2) is a DNA-binding protein that is involved in transcriptional regulation and chromatin remodeling. SATB2 protein has been described as a promising novel marker in several human cancers. PATIENTS AND METHODS:This study compared SATB2 expression in tumor a...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.12292
更新日期:2018-02-01 00:00:00
abstract:BACKGROUND/AIM:Recent studies implied a significant role of hypoxia-inducible factor-1α (HIF1α) in cell transformation. This study aimed to assess the effects of HIF1α on the epithelial-to-mesenchymal transition (EMT) and tumorigenesis of lung adenocarcinoma cells. MATERIALS AND METHODS:Invasion, migration and colony ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.12986
更新日期:2018-11-01 00:00:00
abstract:BACKGROUND:Pleomorphic rhabdomyosarcomas of the uterus, mainly occurring in postmenopausal women with leading symptoms of vaginal bleeding and abdominal pain, are very rare malignant tumors of the female genital tract. Due to the inefficiency of the adjuvant therapy, the outcome remains poor in the majority of the repo...
journal_title:Anticancer research
pub_type: 杂志文章,评审
doi:10.21873/anticanres.11592
更新日期:2017-05-01 00:00:00
abstract:BACKGROUND:Basal cell carcinomas (BCCs) are the most common cutaneous tumors, accounting for approximately 70% of all malignant skin tumors. A morphometric analysis was performed to evaluate whether morphometric parameters of the nuclei of BCC tumor cells may serve as predictors for biological behavior like recurrence ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2003-05-01 00:00:00
abstract::We describe the case of an 80-year-old man with hepatocellular carcinoma (HCC) who developed tracheal obstruction due to peritracheal lymph node metastasis. A metastatic tumor that protruded into the airway was ablated using a neodymium yttrium-aluminium-garnet laser and then a self-expandable metallic stent (SEMS) wa...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2013-04-01 00:00:00
abstract::Eighty one patients with breast cancer stages I, II and III (T3a) were given adjuvant treatment with tamoxifen (Nolvadex), chemotherapy, or both. Most patients had estrogen and progesterone receptors measurement. Twenty one (63.6%) patients of the tamoxifen group were node positive, all 25 (100%) of the chemotherapy p...
journal_title:Anticancer research
pub_type: 临床试验,杂志文章
doi:
更新日期:1996-03-01 00:00:00
abstract:BACKGROUND:Mitoxantrone resistance has been related to the expression of a drug efflux pump breast cancer resistance pump (BCRP) but little is known of the intracellular protein changes. In this work, differential protein expression in a squamous lung carcinoma cell line, DLKP, and its mitoxantrone-resistant variant (D...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2007-05-01 00:00:00
abstract:BACKGROUND/AIM:Pancreatic neuroendocrine tumors (pNETs) are rare pancreatic neoplasms, and therapeutic options for pNETs are limited. Metformin is an anti-hypoglycemic drug that appears to have anticancer effects. However, little is known about the effect of metformin on pNETs. In this study, we investigated the anti-p...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.13933
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND/AIM:Radiotherapy (RT) with adjuvant hormone therapy (HT) improves prognosis in prostate cancer (PC) patients. Gonadotrophin-releasing hormone agonist (GnRHa) with luteinizing hormone-releasing hormone (LH-RH) analogues is the standard HT. High-dose antiandrogen therapy also improves survival in patients with...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.13850
更新日期:2019-11-01 00:00:00
abstract:BACKGROUND:One of the major changes in the new TNM classification (5th edition, 1997) for gastric cancer was made in the classification of N category: the 5th edition employs the number of involved nodes and a minimum of 15 examined nodes is required for N0 classification. The validity of the new TNM classification was...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2003-01-01 00:00:00
abstract:UNLABELLED:The aim of the study was to evaluate the prognostic value of vascular endothelial growth factor C (VEGF-C) and VEGF-D expression in stage II, grade 2 and 3, ductal breast cancer patients. PATIENTS AND METHODS:The immunohistochemical staining of 98 tumor samples and 5- and 10-year overall (OS) and disease-fr...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2007-07-01 00:00:00
abstract:BACKGROUND:A case control association study was carried out to investigate polymorphisms in genes CYP1A1 (3801T > C), GSTM1, and GSTT1 (null genotypes) and oral squamous cell carcinoma (OSCC), including a correlation with some histopathological findings (tumor size, lymph node invasion and degree of tumor differentiati...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2008-03-01 00:00:00
abstract::Bax, bcl-2 and their homologues regulate a distal step in an evolutionary very well conserved pathway of apoptotic cell death. It plays a crucial role in the balance between proliferation rate and cell viability. Thus in the last years the attention of the scientific community towards these proteins has remarkably inc...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1999-01-01 00:00:00
abstract:PURPOSE:Effectiveness of a new device inserted within the common cellulose acetate cigarette filter (named hypobaric chamber tar-removing system, HCTRS) to remove tar and its carcinogenic compounds from mainstream cigarette smoke (MCS). METHODS:Eighty HCTRS prototypes were mounted inside the cellulose acetate filter o...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2001-03-01 00:00:00
abstract:OBJECTIVE:To investigate the role of body composition and oxidative stress measured by total thiol groups (TTG) levels in prostate specimens of patients affected by benign prostatic hyperplasia (BPH) or prostate cancer (PCa). PATIENTS AND METHODS:From January 2011 to January 2013, a cohort of 150 consecutive male pati...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2014-09-01 00:00:00
abstract::We describe the case of a patient with terminal adenocarcinoma of the lung with no response to lymphokine-activated killer (LAK) cell therapy alone who distinctly responded clinically to a combination of high-dose glucocorticoids (GC) and LAK cell therapy, administered by chance. However, after decreasing the dose of ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2010-08-01 00:00:00
abstract:BACKGROUND/AIM:We previously identified that promoter DNA methylation of cysteine dioxygenase type 1 (CDO1) and homeobox only protein homeobox (HOPX) were both cancer specific, and have a clinical potential as prognostic biomarkers in breast cancer (BC). The present study compared the differential prognostic relevance ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.13345
更新日期:2019-05-01 00:00:00
abstract:BACKGROUND:Calpains (CAPN) are intracellular, non-lysosomal cytoplasmic cysteine endopeptidases and they are expressed ubiquitously. Their endogenous specific inhibitor is calpastatin. When calcium is present, calpastatin and calpain attach to each other, inhibiting the protease. The calpain system plays an important r...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2010-07-01 00:00:00
abstract:OBJECTIVE:To analyze the prognostic value of DNA multiploidy in a prospective study on frozen surgical tissue samples from primary colorectal cancer. SUMMARY BACKGROUND DATA:Survival data from eleven prospective studies collectively comprising about thirteen hundred patients showed that aneuploidy correlated with a 5-...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1998-05-01 00:00:00
abstract:BACKGROUND:The p53 tumor suppressor gene is altered in up to 70% of colorectal cancers. MATERIALS AND METHODS:We infected the colorectal cancer cell lines SW620 and KM12L4, in which p53 is mutated, with the replication-defective adenovirus Ad5/CMV/p53 to evaluate the effects of adenovirus-mediated wild-type p53 gene t...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1996-11-01 00:00:00
abstract::F16 is a plant-derived pharmacologically active fraction extracted from Eurycoma longifolia Jack. Previously, we have reported that F16 inhibited the proliferation of MCF-7 human breast cancer cells by inducing apoptotic cell death while having some degree of cytoselectivity on a normal human breast cell line, MCF-10A...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2007-09-01 00:00:00
abstract:BACKGROUND:Hypoxia represents an important tumor-specific target for cancer therapy. We have reported that hypoxic cytotoxins, such as TX-1102, tirapazamine (TPZ) and TX-402, selectively induced tumor cells to p53-independent apoptosis under hypoxic conditions and inhibited angiogenesis. MATERIALS AND METHODS:We inves...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2003-11-01 00:00:00
abstract:BACKGROUND:The objective of the present study was to investigate how oxidative status influences the effectiveness of cytotoxicity of artemisinin towards cancer cells. It is hypothesized that antioxidants would reduce, whereas pro-oxidants would enhance, cytotoxicity. MATERIALS AND METHODS:Molt-4 human leukemia cells ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2015-04-01 00:00:00