Abstract：
BACKGROUND/AIM:Failure of cancer chemotherapy caused by multidrug resistance (MDR) of tumor cells is mediated by ABC transporters that reduce the uptake of cytotoxic agents. Similar transporters are responsible for amyloid clearance in nerve cells in Alzheimer's disease (AD). The aim of this study was to compare the biological effects of amyloid complexes of some known ABC transporter inhibitors e.g. disiloxanes. One of the most active fragments of the pathological "endogen" substrate responsible for AD was investigated in the presence of amyloid-beta fragment on the reversal of multidrug resistance and apoptosis induction on multidrug-resistant tumor cells in model experiments. MATERIALS AND METHODS:The efflux pump activity of the cells treated with amyloid-beta complexes was studied by Rhodamin-123 accumulation. Apoptosis induction was measured by staining of treated cells by Annexin-V and propidium iodine. The fluorescent activity FL-1 and FL-2 of the cells was measured and analyzed on a PARTEC FACScan instrument. RESULTS:The resistance modifiers: disiloxanes and memantine complexed with amyloid-beta 1-42 reduced the activity of ABC transporter in MDR tumor cells. Early apoptosis was moderately increased by amyloid-beta complexes. Late apoptosis and the number of total viable cells were not changed. CONCLUSION:Amyloid-beta and its complexes inactivate the efflux pump of tumor cells resulting in accumulation of amyloid. It is supposed that reduced membrane transport can explain the lower incidence of cancer in AD.
journal_name
Anticancer Resjournal_title
Anticancer researchauthors
Molnar J,Ocsovszki I,Pusztai Rdoi
10.21873/anticanres.12608subject
Has Abstractpub_date
2018-06-01 00:00:00pages
3407-3410issue
6eissn
0250-7005issn
1791-7530pii
38/6/3407journal_volume
38pub_type
杂志文章abstract：:Tumor cell invasion was studied using the 9-day chick embryo skin (CES). The invasion process was broken down into 4 sequential events: adhesion, penetration, proliferation and colonization. Tumor cells used in this study included cells from various human and canine solid tumors, tumor cell lines from human and animal...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1989-01-01 00:00:00
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journal_title：Anticancer research
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更新日期：2000-11-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1995-07-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2014-07-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2006-03-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1982-11-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：10.21873/anticanres.11510
更新日期：2017-04-01 00:00:00
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pub_type： 杂志文章
doi：
更新日期：2013-04-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章,评审
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更新日期：2017-10-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2013-04-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2006-01-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2005-03-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1997-11-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1986-03-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1992-03-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2001-05-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2004-05-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1983-05-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：10.21873/anticanres.14653
更新日期：2020-11-01 00:00:00
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journal_title：Anticancer research
pub_type： 临床试验,杂志文章
doi：
更新日期：2003-03-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2008-09-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1997-03-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2011-12-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：10.21873/anticanres.13790
更新日期：2019-11-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：10.21873/anticanres.14327
更新日期：2020-06-01 00:00:00
abstract：:The proteasome inhibitor, bortezomib, is known to be effective in the therapy of various neoplasms. The objective of this study was the analysis of the ex vivo activity of bortezomib in paediatric acute lymphoblastic leukaemia (ALL), in comparison to paediatric acute myeloid leukaemia (AML). A total of 159 patients en...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2010-06-01 00:00:00
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journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2015-11-01 00:00:00
abstract：:The quest for immunotherapies against cancer has been ongoing for many years, and a greater understanding of the normal mechanisms involved in developing immune responses has now led to clinically effective therapies. With the licensing of Ipilimumab and Sipuleucel-T, immunotherapeutic strategies are taking their plac...
journal_title：Anticancer research
pub_type： 杂志文章,评审
doi：
更新日期：2012-07-01 00:00:00
abstract：:EGF/TGF-alpha and progesterone were measured in the urine of 74 ovarian carcinoma patients, 21 postmenopausal women with non-gynecological disseminated cancer, 20 premenopausal and 20 postmenopausal controls. Radically operated women excreted significantly less EGF/TGF-alpha into urine than women with residual tumour ...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1994-09-01 00:00:00
abstract：BACKGROUND:The combined effects of Human papillomavirus (HPV) and Herpes simplex type 1 (HSV-1) infections and their effects on cancer cell radioresistance are unexplored. MATERIALS AND METHODS:An HPV16-positive hypopharyngeal carcinoma cell line (UD-SCC-2) was infected with wt-HSV-1 at low multiplicity of infection (...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2016-02-01 00:00:00
