Abstract:
:We previously reported that MX2, a new morpholino anthracycline, showed marked effects on pleiotropic drug-resistant sublines of murine P388 leukemia in vivo as well as in vitro. In this study we examine the in vitro cytotoxicity against pleiotropic drug-resistant sublines of human tumor cell lines. MX2 was effective against multidrug-resistant sublines of four human tumor cell lines; these cells, having a 4.8- to 200-fold cross-resistance to Adriamycin (ADM) showed only a 0.7- to 2.3-fold resistance to MX2 compared with the sensitive cells. To elucidate the mechanism by which MX2 overcomes multidrug resistance, the intracellular pharmacology of MX2 in human myelogenous leukemia K562 and its ADM-resistant subline (K562/ADM) was examined. Both K562 and K562/ADM cells accumulated MX2 more easily than ADM, and the intracellular accumulation of MX2 attained a steady state in both cell lines within 30 min of incubation at 37 degrees C. The amount of MX2 that accumulated in K562/ADM at a steady state was only 1.3 times lower than that in K562. However, ADM was accumulated slowly in both cell lines compared with MX2, and the intercellular concentration reached a steady state in K562/ADM after 90 min of incubation and in K562 after more than 120 min. K562/ADM cells accumulated a 3.3-fold lower concentration of ADM than K562 after 120 min of exposure. The steady-state concentration of ADM in K562/ADM was 8.3 times lower than that of MX2. In addition, greater than 70% of MX2 was retained in both cell lines after 150 min of incubation in the absence of this drug. Verapamil, a calcium antagonist, hardly augmented the cytotoxicity of MX2 against K562/ADM, and no distinct effect of this drug on both the time course and the maximal level of accumulation of MX2 was observed. Interestingly, MX2 effectively inhibited ATP/Mg2(+)-dependent [3H]vincristine binding to K562/ADM membrane preparations, indicating that MX2 could be transported outside the cell by an active efflux pump. The high intracellular accumulation and retention of MX2 in K562/ADM through the rapid influx of the drug into the cells may be one of the reasons why MX2 circumvents pleiotropic drug resistance.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Watanabe M,Komeshima N,Naito M,Isoe T,Otake N,Tsuruo Tsubject
Has Abstractpub_date
1991-01-01 00:00:00pages
157-61issue
1eissn
0008-5472issn
1538-7445journal_volume
51pub_type
杂志文章相关文献
CANCER RESEARCH文献大全abstract::This report describes an early and direct action of oncogenic agents and its apparent consequences. Chemical carcinogen has been found to interact principally with a specific polypeptide in livers of normal rats. Short-term ingestion of carcinogen causes marked reductions in the concentrations of both the carcinogen:p...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1980-12-01 00:00:00
abstract::cis- and trans-diamminedichloroplatinum(II) (PDD) produced a DNA cross-linking effect in mouse leukemia L1210 cells, which was demonstrable after subtoxic treatments with the DNA alkaline elution technique. Cross-linking effects developed following treatments with concentrations as low as 1 micron for cis-PDD and 5 mi...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1978-06-01 00:00:00
abstract::LMO2 is a transcription regulator involved in human T-cell leukemia, including some occurring in X-SCID gene therapy trials, and in B-cell lymphomas and prostate cancer. LMO2 functions in transcription complexes via protein-protein interactions involving two LIM domains and causes a preleukemic T-cell development bloc...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-08-4774
更新日期:2009-06-01 00:00:00
abstract::The effects of sodium butyrate, dimethyl sulfoxide (DMSO), and retinoic acid on the growth, morphology, carcinoembryonic antigen content, cell surface membrane-associated enzyme activities, and glycoprotein profiles of a human rectal adenocarcinoma cell line (HRT-18) in culture were compared. All three agents reversib...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1982-03-01 00:00:00
abstract::Elevated expression of Bmi-1 is associated with many cancers, including breast cancer. Here, we examined the oncogenic potential of Bmi-1 in MCF10A cells, a spontaneously immortalized, nontransformed strain of human mammary epithelial cells (HMEC). Bmi-1 overexpression alone in MCF10A cells did not result in oncogenic...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-07-1636
更新日期:2007-11-01 00:00:00
abstract::The ubiquitin proteasome system is responsible for the proteolysis of important cell cycle and apoptosis-regulatory proteins. In this paper we report that the dipeptidyl proteasome inhibitor, phthalimide-(CH2)8CH-(cyclopentyl) CO-Arg(NO2)-Leu-H (CEP1612), induces apoptosis and inhibits tumor growth of the human lung c...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2001-02-15 00:00:00
abstract::Neoplasms in fish normally show poor abilities for metastasis, and there are no reports on intestinal cancer with metastasis to other organs. In aquaculture production, carnivorous salmonids in Northern Europe receive commercial feeds with plant ingredients. Such contents have been shown to cause chronic intestinal in...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-08-4877
更新日期:2009-05-15 00:00:00
abstract::We studied the conditions required for eradication by immunization of occult lymph node metastases which remained after surgical removal of an intradermally transplanted cavian hepatoma. Guinea pigs that received no postsurgical treatment all died with progressively growing lymph node metastases. The growth of these m...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1980-11-01 00:00:00
abstract::Although African-American (AA) patients with prostate cancer tend to develop greater therapeutic resistance and faster prostate cancer recurrence compared with Caucasian-American (CA) men, the molecular mechanisms of this racial prostate cancer disparity remain undefined. In this study, we provide the first comprehens...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-18-2383
更新日期:2019-04-01 00:00:00
abstract::The pharmacological properties of garlic and its derivatives are long known, and their underling mechanisms are being extensively investigated. In this study we have addressed the effects of diallyl disulfide (DADS), an oil-soluble garlic molecule, on cell growth of neuroblastoma cell SH-SY5Y, focusing on the redox ev...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2003-09-15 00:00:00
abstract::Continued monitoring of a family for new malignant tumors has revealed diverse immunological and neoplastic disorders during a 15-year period. In 1966, the proband developed lymphoma. In 1975, his antibody titers to Epstein-Barr virus (EBV) became elevated, and again, he developed a malignant lymphoma. He also had bor...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1981-11-01 00:00:00
abstract::Verapamil has been shown to enhance immunotoxin activity but only at concentrations that are too high for in vivo use. Therefore, four structural analogues of verapamil (D792, D595, D528, and Sz45) were evaluated for their ability to enhance the in vitro activity of immunotoxins made with either ricin A chain or Pseud...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1989-09-01 00:00:00
abstract::: Cancer cells in quiescence (G0 phase) are resistant to death, and re-entry of quiescent cancer cells into the cell-cycle plays an important role in cancer recurrence. Here we show that two p53-responsive miRNAs utilize distinct but complementary mechanisms to promote cancer cell quiescence by facilitating stabilizat...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-18-1886
更新日期:2018-12-01 00:00:00
abstract::N-[4-(5-Nitro-2-furyl)-2-thiazolyl]acetamide (NFTA) metabolism was examined in vitro using microsomes prepared from rat liver and renal cortex and from rabbit liver and renal cortex and outer and inner medulla. NFTA nitroreduction was observed with each tissue. Three mol of NADPH were used per mol of NFTA reduced. Sub...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1985-01-01 00:00:00
abstract::PRL-3, an oncogenic dual-specificity phosphatase, is overexpressed in 50% of acute myelogenous leukemia (AML) and associated with poor survival. We found that stable expression of PRL-3 confers cytokine independence and growth advantage of AML cells. However, how PRL-3 mediates these functions in AML is not known. To ...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-13-2321
更新日期:2014-06-01 00:00:00
abstract::In a study of human breast carcinomas in short-term organ culture, in which plasminogen activator modulation by estrogen was used as a test of estrogen sensitivity (R. Mira-y-Lopez and L. Ossowski, Cancer Res., 47: 3558-3564, 1987), we found that the number of estrogen and progesterone receptor-positive cancers showin...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1990-01-01 00:00:00
abstract::The inactivation of p53 functions enhances the efficiency and decreases the latency of producing induced pluripotent stem cells (iPSC) in culture. The formation of iPSCs in culture starts with a rapid set of cell divisions followed by an epigenetic reprogramming of the DNA and chromatin. The mechanisms by which the p5...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-12-1451
更新日期:2012-11-01 00:00:00
abstract::Chinese hamster V-79 cells were treated with high cytotoxic or low noncytotoxic concentrations of the highly carcinogenic and mutagenic (-)-(1R,2S,3S,4R)-3,4-dihydroxy-1, 2-epoxy-1,2,3,4-tetrahydrobenzo[c]phenanthrene [(-)-B[c]PhDE; fjord-region diol epoxide] or its biologically less active (+)-(1S,2R,3R,4S) enantiome...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1996-08-15 00:00:00
abstract::Metastatic prostate cancer continues to pose a difficult therapeutic challenge. Prostate cancer progression is associated with aberrant O-glycosylation of cancer cell surface receptors, but the functional impact of such events is uncertain. Here we report spontaneous metastasis of human prostate cancer xenografts that...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-16-0641
更新日期:2016-10-01 00:00:00
abstract::Emerging technologies allow broad profiling of the cancer genome for differential DNA methylation relative to benign cells. Herein, bisulfite-modified DNA from lymph nodes with either reactive hyperplasia or follicular lymphoma (FL) were analyzed using a commercial C/UpG genotyping assay. Two hundred fifty-nine differ...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-08-2984
更新日期:2009-02-01 00:00:00
abstract::Murine sarcoma virus (Moloney strain) (MSV-M)-induced tumors are unusual in that they regularly appear less than 2 weeks after virus inoculation, progress for 1 to 2 weeks, and are rejected by normal adult BALB/c mice. Rejectio leaves the animals immune to tumor induction. In the present study, presensitization of nor...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1976-12-01 00:00:00
abstract::A transplanted rat lymphosarcoma (SGT-4), induced by Gross virus and inoculated s.c. into the foot of a normal syngeneic rat, initially grew but ultimately regressed. The tumor cells metastasized to the regional popliteal, lumbar, and inguinal lymph nodes and formed massive metastatic foci there. These lymph node meta...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1975-07-01 00:00:00
abstract::Clinical response of liver metastases treated by high-dose intraarterial chemotherapy (HDIAC) delivered via the hepatic artery was predicted by a modification of the human tumor colony-forming assay (HTCFA) originally described by Hamburger and Salmon [Science (Wash. DC), 197:461-463, 1977. In a first set of experimen...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1986-09-01 00:00:00
abstract::Angiogenesis is one of the crucial events for cancer development and growth. Two members of the vascular endothelial growth factor (VEGF) family, VEGF-A and placental growth factor (PlGF), which are able to heterodimerize if coexpressed in the same cell, are both required for pathologic angiogenesis. We have generated...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-09-2609
更新日期:2010-03-01 00:00:00
abstract::In order to determine the potential role of sex steroid and 1,25-dihydroxyvitamin D3 in the spreading of colorectal cancer, previously hypothesized from epidemiological and experimental data, specific androgen (AR, n = 94), estrogen (ER, n = 60), progesterone (PGR, n = 50), and 1,25-dihydroxyvitamin D3 receptors (VDR,...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1991-02-15 00:00:00
abstract::Heat stress may enhance the effect of apoptosis-inducing agents in resistant tumor cells. One such agent is the tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), which has attracted intense interest for its ability to induce apoptosis in tumors without affecting nonmalignant cells. We therefore tested w...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-06-3871
更新日期:2007-03-15 00:00:00
abstract::Telomerase activity (TA) is detected in most human cancers but, with few exceptions, not in normal somatic cells. Little is known about TA in soft tissue tumors. We have examined a series of benign and malignant soft tissue tumors for TA using the telomerase repeat amplification protocol assay. Analysis of the express...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1999-07-01 00:00:00
abstract::Although significant advances in radiotherapy have increased its effectiveness in many cancer settings, general strategies to widen the therapeutic window between normal tissue toxicity and malignant tumor destruction would still offer great value. CD47 blockade has been found to confer radioprotection to normal tissu...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-14-0037-T
更新日期:2014-12-01 00:00:00
abstract::The fate of circulating tumor cells is an important determinant of their ability to form distant metastasis. Here, we demonstrate the use of in vivo flow cytometry as a powerful new method for detecting quantitatively circulating cancer cells. We specifically examine the circulation kinetics of two prostate cancer cel...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-04-1058
更新日期:2004-08-01 00:00:00
abstract::Polyglutamyl derivatives of methotrexate (MTX) and 10-deazaaminopterin (10-DAM) containing a total of one through six glutamate residues (Glu residues) were tested as inhibitors of dihydrofolate reductase (DHFR) derived from sheep, chicken, and beef liver. The ability of dihydropteroylpentaglutamate to antagonize the ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1986-10-01 00:00:00