Abstract:
:A human stomach-adenocarcinoma cell line (MKN-45) was selected for resistance to Adriamycin by stepwise exposure to increasing concentrations of this agent. The resulting cell line (MKN/ADR) exhibited a high level of cross-resistance to topoisomerase II (topo II)-targeted drugs such as Adriamycin, mitoxantrone, and etoposide but showed no cross-resistance to other chemotherapeutic agents such as cisplatin, carboplatin, 5-fluorouracil, or mitomycin-C. P-glycoprotein encoded by the mdr-1 gene was not overexpressed in the MKN/ADR cell line. The doubling time of the MKN/ADR cell line (2.1 days) increased only slightly as compared with that of the MKN cell line (1.7 days). The patterns of cross-resistance to various chemotherapeutic agents led us to examine the cellular contents of topo II in both the drug-sensitive and the drug-resistant cells. Extractable topo II enzyme activity was 3-fold lower in MKN/ADR cells as compared with the parental MKN cells. Levels of topoisomerase I (topo I) catalytic activity were similar in both wild-type MKN and drug-resistant MKN/ADR cells. Southern-blot analysis of genomic DNA probed with topo IIalpha or IIbeta showed no sign of either gene rearrangement or hypermethylation. Northern-blot analysis revealed that both topo IIalpha and topo IIbeta mRNA transcripts were essentially identical in the MKN and MKN/ADR cells. In contrast, Western-blot analysis revealed an approximately 20-fold lower level of topo IIalpha in drug-resistant cells as compared with drug-sensitive cells, whereas topo IIbeta levels were similar in both lines. Moreover, the amount of in vivo topo IIalpha-DNA covalent complexes formed in the presence of etoposide was also approximately 20-fold lower in drug-resistant cells. No mutation was detected in the promoter region of the topo IIalpha gene in resistant cells as compared with sensitive cells. Thus, low levels of topo IIalpha polypeptide cannot be ascribed to changes in the mRNA levels. Collectively, the data suggest that a quantitative reduction in topo IIalpha may contribute to the resistance of MKN cells to Adriamycin and other topo II-targeted drugs.
journal_name
Cancer Chemother Pharmacoljournal_title
Cancer chemotherapy and pharmacologyauthors
Son YS,Suh JM,Ahn SH,Kim JC,Yi JY,Hur KC,Hong WS,Muller MT,Chung IKdoi
10.1007/s002800050751subject
Has Abstractpub_date
1998-01-01 00:00:00pages
353-60issue
5eissn
0344-5704issn
1432-0843journal_volume
41pub_type
杂志文章abstract:PURPOSE:This study aimed at investigating the anti-tumor effect of arsenic sulfide (As2S2) against liver cancer both in vivo and in vitro and to elucidate its underlying mechanisms. METHODS:Cell viability of the human hepatocellular carcinoma cell lines SMMC-7721, BEL-7402, HepG2 were measured by CCK-8 assay. The effe...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-018-3755-9
更新日期:2019-03-01 00:00:00
abstract::We have studied the effects of the chemotherapeutic drug cis-diamminedichloroplatinum(II) (cis-platin) on three human ovarian carcinoma cell lines - one sensitive to the drug (CH1), one with acquired resistance (CH1cisR) and one with intrinsic resistance (SKOV-3). Previous work has shown that the 50% inhibitory concen...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s002800050413
更新日期:1996-01-01 00:00:00
abstract::Copovithane is an uncharged, water-soluble, synthetic polymer with an average molecular weight of 5800 daltons. It demonstrates antitumor activity in vivo against a variety of tumors in animal models but is inactive in vitro. This agent has been found to have immunorestorative activity in man. In concert with its phas...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/BF00273396
更新日期:1986-01-01 00:00:00
abstract::We treated 101 patients with advanced (stage III and IV) lymphosarcoma and reticulosarcoma at first presentation of the disease or in relapse according to a protocol combining initial chemotherapy, complementary radiotherapy on icebergs, supplementary chemotherapy, and, finally, active immunotherapy. The overall compl...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/BF00257149
更新日期:1978-01-01 00:00:00
abstract::BS compounds, a series of new dihydropyridines, successfully overcame multidrug resistance in P388/ADR cells in vitro. These agents synergistically potentiated the cytotoxicity of Adriamycin to P388/ADR cells at a concentration of 1-2 microM, whereas they showed hardly any synergistic effect in the parental cell line ...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/BF00257444
更新日期:1989-01-01 00:00:00
abstract:PURPOSE:ABT-888 inhibits poly(ADP-ribose) polymerase (PARP) and may enhance the efficacy of chemotherapy and radiation in CNS tumors. We studied the plasma and cerebrospinal fluid (CSF) pharmacokinetics (PK) of ABT-888 in a non-human primate (NHP) model that is highly predictive of human CSF penetration. METHODS:ABT-8...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-009-1044-3
更新日期:2010-02-01 00:00:00
abstract:PURPOSE:In patients with epidermal growth factor receptor (EGFR)-mutated, advanced, non-small cell lung cancer (NSCLC), common gefitinib-sensitive EGFR mutations that predict a greater response to therapy include the exon 19 deletion and L858R point mutation. The objective of this study was to evaluate whether body sur...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-016-3232-2
更新日期:2017-03-01 00:00:00
abstract:PURPOSE:Epigenetic silencing of tumor suppressor genes (TSGs) by aberrant DNA methylation and chromatin deacetylation provides interesting targets for chemotherapeutic intervention by inhibitors of these events. 5-Aza-2'-deoxycytidine (decitabine, 5AZA-CdR) is a potent demethylating agent, which can reactivate TSGs sil...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-006-0225-6
更新日期:2006-11-01 00:00:00
abstract::While N-phosphonacetyl-L-aspartic acid (PALA), an inhibitor of de novo pyrimidine biosynthesis, demonstrated a unique spectrum of activity during preclinical drug evaluation, multiple clinical trials have shown it to possess minimal clinical activity. One explanation for the disappointing results is the possibility th...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/BF00296262
更新日期:1987-01-01 00:00:00
abstract::In this review of the management of invasive carcinoma of the bladder the results of primary and systemic therapies are evaluated in the light of the natural history of the disease. The clinical and pathological causes of treatment failure are assessed in an attempt to identify new approaches that may be used in the f...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章,评审
doi:10.1007/BF00254978
更新日期:1979-01-01 00:00:00
abstract:PURPOSE:To compare the in vitro cytotoxicity of nedaplatin, an investigational platinum analog, with that of the standard platinum agents, cisplatin and carboplatin, against fresh human, epithelial ovarian cancers. METHODS:The Hamburger-Salmon human tumor colony-forming assay (HTCA) was used to measure the chemosensit...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s002800050604
更新日期:1997-01-01 00:00:00
abstract:PURPOSE:This study aimed at evaluating if pharmacokinetic and pharmacodynamic data from the first few patients treated with an investigational monoclonal antibody in a dose-escalation study can be used to guide the early initiation of potentially more efficacious combination regimens. METHODS:Emerging pharmacokinetic ...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章,多中心研究
doi:10.1007/s00280-017-3328-3
更新日期:2017-06-01 00:00:00
abstract::Anthracyclines are powerful cytotoxic agents, used as first-line treatment of leukemias and many other tumors, but host-tissue toxicity is their main dose-limiting factor. However, their therapeutic effects depend not only on the toxicity, hence on the dose, but also on drug resistance. Among the mechanisms that can a...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-005-0043-2
更新日期:2006-04-01 00:00:00
abstract::A 44-year-old man who had achieved a complete remission of malignant peritoneal mesothelioma after the intraperitoneal administration of 25 mg/m2 mitoxantrone presented with clinical and radiological signs of intestinal obstruction suggestive of recurrent disease at about 2 years following the initial treatment. Howev...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/BF00686012
更新日期:1992-01-01 00:00:00
abstract:PURPOSE:The prognosis of gastroesophageal cancer is poor, and current regimens are associated with limited efficacy. The purpose of this study was to explore the safety and preliminary efficacy of docetaxel, oxaliplatin plus capecitabine for advanced cancer of the stomach or the gastroesophageal junction (GEJ). Seconda...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章,多中心研究
doi:10.1007/s00280-015-2872-y
更新日期:2015-12-01 00:00:00
abstract:PURPOSE:This phase I trial was initiated to evaluate the safety, pharmacokinetics (PK) and maximum tolerated dose (MTD) of the glycolytic inhibitor, 2-deoxy-D-glucose (2DG) in combination with docetaxel, in patients with advanced solid tumors. METHODS:A modified accelerated titration design was used. 2DG was administe...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-012-2045-1
更新日期:2013-02-01 00:00:00
abstract::The intestinal absorption of 6-mercaptopurine and its nucleoside 6-mercaptopurine riboside has been studied in the rat with the in situ dual luminal and vascular perfusion. 6-Mercaptopurine is an inactive prodrug that requires intestinal absorption, cellular uptake and intracellular anabolism for cytotoxic activity. V...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/BF00689198
更新日期:1995-01-01 00:00:00
abstract::Pretreatment of the human lymphoblastoid cell line CCRF-CEM with 0.02 microM arabinosyl cytosine (ara C) enhances both the cytotoxic and the DNA-damaging effects of etoposide. This concentration of ara C is itself non-cytotoxic and results in no detectable DNA damage as measured by alkaline elution. Ara C pretreatment...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/BF00685101
更新日期:1992-01-01 00:00:00
abstract:PURPOSE:Oral administration of 9-nitrocamptothecin (9NC), and the formation of its metabolite 9-aminocamptothecin (9AC), may be associated with high interpatient and intrapatient variability. Therefore, we evaluated the plasma pharmacokinetics and urine recovery of 9NC administered on three different schedules as part ...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/s00280-004-0835-9
更新日期:2004-12-01 00:00:00
abstract:PURPOSE:The purpose of this investigation was to synthesize a series of carbonate and carbamate derivatives of 4-demethylpenclomedine (DM-PEN), the major plasma non-toxic metabolite of penclomedine (PEN) seen in patients. DM-PEN has been observed to be an active antitumor agent in mouse human xenograft tumor models and...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-009-0933-9
更新日期:2009-09-01 00:00:00
abstract:PURPOSE:Platinum-based chemotherapy is the recognized first-line treatment for metastatic nasopharyngeal carcinoma (NPC). However, no standard treatment regimens have been established. This phase II study was designed to evaluate the efficacy and safety of a paclitaxel, cisplatin and 5-FU combination in metastatic and/...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-012-2020-x
更新日期:2013-02-01 00:00:00
abstract:OBJECTIVE:To characterize the population pharmacokinetics of plitidepsin (Aplidin) in cancer patients. METHODS:A total of 283 patients (552 cycles) receiving intravenous plitidepsin as monotherapy at doses ranging from 0.13 to 8.0 mg/m(2) and given as 1- or 24-h infusions every week; 3- or 24-h infusion biweekly; or 1...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章,meta分析
doi:10.1007/s00280-008-0841-4
更新日期:2009-06-01 00:00:00
abstract:PURPOSE:M30 and M65 ELISAs are proposed as surrogate biomarkers of tumour cell death in patients and are being applied increasingly in the pharmacodynamic (PD) evaluation of anticancer drugs during clinical trials. In the absence of such data, we have studied the long-term stability of the antigens of both assays in pl...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-007-0437-4
更新日期:2007-11-01 00:00:00
abstract::Breast cancer is presently the most predominant tumor type and the second leading cause of tumor-related deaths among women. Although advancements in diagnosis and therapeutics have momentously improved, chemoresistance remains an important challenge. Tumors oppose chemotherapeutic agents through a variety of mechanis...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章,评审
doi:10.1007/s00280-020-04222-w
更新日期:2021-01-09 00:00:00
abstract::To evaluate the antiemetic efficacy of high-dose methylprednisolone (MP) in previously untreated cancer patients receiving cisplatin (CPDD) for the first time, we performed a randomized double blind study. MP or a placebo (PLB) was administered six times during each course of chemotherapy. The first dose was 500 mg an...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF00258123
更新日期:1985-01-01 00:00:00
abstract:PURPOSE:This phase I study was undertaken to evaluate the safety and tolerability of prolonged infusional etoposide, and to evaluate its pharmacokinetic/pharmacodynamic profile in patients with advanced cancer. METHODS:A group of 17 patients received a 7-day infusion of etoposide (schedule A) every 21 days at doses fr...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/s002800050511
更新日期:1996-01-01 00:00:00
abstract:INTRODUCTION:Niraparib (Zejula™) is a poly(ADP-ribose) polymerase inhibitor recently approved by the US Food and Drug Administration for the maintenance treatment of patients with recurrent platinum-sensitive epithelial ovarian, fallopian tube, or primary peritoneal cancer who are in a complete or partial response to p...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-017-3455-x
更新日期:2018-01-01 00:00:00
abstract:PURPOSE:Since there is a growing interest in preclinical research on interactions between radiation and cytotoxic agents, this study focused on the development of an alternative to the very laborious clonogenic assay (CA). METHODS:The colorimetric sulforhodamine B (SRB) assay was compared to the clonogenic assay for r...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-002-0557-9
更新日期:2003-03-01 00:00:00
abstract::Etoposide is a widely used cytotoxic drug that requires complex formulation for both the i.v. and oral preparation to ensure drug stability. Data on the stability of the i.v. formulation when diluted in infusion fluids are contradictory, and there is little information on the stability of the oral preparation in gastr...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/BF00685638
更新日期:1995-01-01 00:00:00
abstract:PURPOSE:Pharmacokinetic analyses estimate the mean concentration of drug within a given tissue as a function of time, but do not give information about the spatial distribution of drugs within that tissue. Here, we compare the time-dependent spatial distribution of three anticancer drugs within tumors, heart, kidney, l...
journal_title:Cancer chemotherapy and pharmacology
pub_type: 杂志文章
doi:10.1007/s00280-013-2176-z
更新日期:2013-07-01 00:00:00