Abstract:
:We examined the expression of the estrogen and epidermal growth factor (EGF) receptors in a drug-resistant subline of MCF-7 cells in order to study potential alterations in hormone dependence or in the growth factor pathway that could be related to the development of drug resistance in human breast cancer. The drug-resistant subline was derived from MCF-7 cells by selection with Adriamycin in the presence of the P-glycoprotein antagonist, verapamil, to prevent acquisition of the classical multidrug resistance phenotype. The Adriamycin-resistant cells retain estrogen-binding, estrogen-responsive monolayer growth, and estrogen-dependent tumorigenesis. Estrogen-binding studies demonstrate 1.4 x 10(6) sites per cell with unaltered affinity when compared to parental MCF-7 cells, which have 2.7 x 10(5) sites per cell. An increase in expression of EGF receptor, eight to 12-fold, occurred early in the selection for drug resistance, and appears to be unrelated to verapamil exposure, since cells maintained in Adriamycin without verapamil also have increased EGF receptor expression. Partially drug-sensitive revertants carried a verapamil, but out of Adriamycin, demonstrate a decline in EGF receptor expression. We postulate that activation of growth factor pathways in drug-resistant cells may enhance mechanisms of drug resistance, or provide mitogenic stimuli for cells to recover after damage by drug exposure.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Dickstein B,Valverius EM,Wosikowski K,Saceda M,Pearson JW,Martin MB,Bates SEdoi
10.1002/jcp.1041570115subject
Has Abstractpub_date
1993-10-01 00:00:00pages
110-8issue
1eissn
0021-9541issn
1097-4652journal_volume
157pub_type
杂志文章abstract::Several proteases and their specific inhibitors modulate the interdependent processes of cell migration and matrix proteolysis as part of the global program of trauma repair. Expression of plasminogen activator inhibitor type-1 (PAI-1), a serine protease inhibitor (SERPIN) important in the control of barrier proteolys...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.20016
更新日期:2004-08-01 00:00:00
abstract::A method, based on the differing capacities of cells to adhere to a column of polyester fibres, has been described for separating human bone marrow cells into a nonadherent and an adherent fraction. The effect of this cell separation procedure on colony formation by erythroid progenitor cells was investigated. In cont...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1040910108
更新日期:1977-04-01 00:00:00
abstract::The mitogenic effect of recombinant human erythropoietin (rHuEpo) on primary cultures of neonatal rat cardiac myocytes was observed. rHuEpo triggered a dose-dependent increase in myocyte proliferation. The hormone effect over optimally grown control culture 1 day after addition was maximum with 0.5 U/ml and was inhibi...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4652(199606)167:3<461::AID-JCP1
更新日期:1996-06-01 00:00:00
abstract::Integrins are heterodimeric transmembrane proteins that play important roles in various biological processes. Most integrins serve as adhesion molecules and transmit bidirectional signaling across the cell membrane through global conformational changes from the bent closed to the extended open conformation. However, i...
journal_title:Journal of cellular physiology
pub_type: 杂志文章,评审
doi:10.1002/jcp.30242
更新日期:2020-12-27 00:00:00
abstract::Clones of Chinese hamster ovary (CHO) cells were isolated by single-step selection for resistance to killing Concanavalin A (ConA) and certain cellular and membrane properties were examined. The ConA-resistant isolates were only about 2-fold more resistant than wild type cells to the selecting lectin, but exhibited pl...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041000105
更新日期:1979-07-01 00:00:00
abstract::T lymphocytes from aged donors function poorly, but the biochemical basis for the defect remains uncertain. We tested the hypothesis that T cells from old mice had a diminished ability to transmit extracellular signals into the cytoplasm, by measuring intracellular free calcium concentrations (Cai) in T cells stimulat...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041320220
更新日期:1987-08-01 00:00:00
abstract::Pathological calcification represents an event that consequently leads to a distinct elevation in the morbidity and mortality of patients with chronic kidney disease (CKD) in addition to strengthening its correlation with hyperphosphatemia. Epigenomic regulation by specific microRNAs (miRNAs) is reported to be involve...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.28130
更新日期:2019-08-01 00:00:00
abstract::Rat thyroid follicles in both the normal and the inverted configuration have been cultured in suspension. It has been found that normal follicles (i.e., those having a structural organization similar to the follicles in vivo) express most functional properties of the thyroid gland. They trap iodide, synthesize, secret...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041260113
更新日期:1986-01-01 00:00:00
abstract::The loss of pancreatic islet β-cell function represents the classical feature in the pathogenesis of type 2 diabetes mellitus (T2DM). Previous evidence has highlighted the involvement of the activated JNK pathway in relation to islet β-cell apoptosis. Hence, during the present study a streptozotocin-induced DM mice mo...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.26569
更新日期:2018-09-01 00:00:00
abstract::The increasing rate of mortality and morbidity because of cardiac diseases has called for efficient therapeutic needs. With the advancement in cell-based therapies, stem cells are abundantly studied in this area. Nearly, all sources of stem cells are experimented to treat cardiac injuries. Tissue engineering has also ...
journal_title:Journal of cellular physiology
pub_type: 杂志文章,评审
doi:10.1002/jcp.28330
更新日期:2019-02-27 00:00:00
abstract::Reduced sperm motility (asthenospermia) and resulting infertility arise from deletion of the Plasma Membrane Ca2+ -ATPase 4 (Pmca4) gene which encodes the highly conserved Ca2+ efflux pump, PMCA4. This is the major Ca2+ clearance protein in murine sperm. Since the mechanism underlying asthenospermia in PMCA4's absence...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.25882
更新日期:2018-01-01 00:00:00
abstract::Normal human keratinocytes (NHK) were cultured in serum-free medium, containing low (0.1 mM) or high (2 mM) calcium, to obtain proliferating and differentiating cultures, respectively. Proteoglycan (PG) synthesis of proliferating and differentiating NHK was investigated. Cultures were labeled with 35S-sulfate, and the...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041400113
更新日期:1989-07-01 00:00:00
abstract::Focal adhesion kinase (FAK), MAP kinases and the nuclear transcription factor Elk-1 have been reported to be implicated in the same cellular processes, however, their direct or indirect interaction and potential function(s) has not been documented. Here, we explored the association of FAK with Elk-1, the implication o...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.21390
更新日期:2008-07-01 00:00:00
abstract:BACKGROUND:Acute kidney injury (AKI) shows several kinds of disorders, which acutely harm the kidney. However, the current medical methods have limited therapeutic effects. The present study aimed to find out the molecular mechanism of AKI pathogenesis, which may provide new insights for future therapy. METHODS:Bioinf...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.28118
更新日期:2019-08-01 00:00:00
abstract::Impaired cardiac control of intracellular diastolic Ca(2+) gives rise to arrhythmias. Whereas exercise training corrects abnormal cyclic Ca(2+) handling in heart failure, the effect on diastolic Ca(2+) remains unstudied. Here, we studied the effect of exercise training on the generation and propagation of spontaneous ...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.22771
更新日期:2012-01-01 00:00:00
abstract::Cardiac fibroblast (CF) differentiation to myofibroblasts expressing α-smooth muscle actin (α-SMA) plays a key role in cardiac fibrosis. Therefore, a study of the mechanism regulating α-SMA expression is a means to understanding the mechanism of fibroblast differentiation and cardiac fibrosis. Previous studies have sh...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.27471
更新日期:2019-05-01 00:00:00
abstract::A previously described chondrocyte alkaline phosphatase induction factor (CAP-IF) for chicken epiphyseal growth plate chondrocytes has been purified to SDS-PAGE homogeneity from fetal bovine serum by ammonium sulfate precipitation and by dye-ligand affinity (Affi-Gel Blue and Reactive Green-19 agarose) and hydroxyapat...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041490208
更新日期:1991-11-01 00:00:00
abstract::Long-chain fatty acid (LCFA) movement into skeletal muscle involves a highly mediated process in which lipid rafts are utilized in the cellular membrane, involving numerous putative plasma membrane-associated LCFA transport proteins. The process of LCFA uptake and oxidation is of particular metabolic significance both...
journal_title:Journal of cellular physiology
pub_type: 杂志文章,评审
doi:10.1002/jcp.25281
更新日期:2016-08-01 00:00:00
abstract::Quercetin has potentially beneficial effects on disease prevention, including cancer. An intriguing issue regarding the mechanisms of action of quercetin is the ability of this drug to modulate estrogen receptor (ER) activities. In a previous study, we demonstrated that quercetin elicited apoptosis through an ERα-depe...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.22917
更新日期:2012-05-01 00:00:00
abstract::A new system for studying growth of normal human mammary epithelial cells in an in vivo environment using athymic nude mice is described. Human mammary epithelial cells dissociated from reduction mammoplasty specimens were embedded within collagen gels and subsequently transplanted subcutaneously into nude mice. Histo...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041630107
更新日期:1995-04-01 00:00:00
abstract::The mechanisms of agonist-induced calcium entry (ACE) following depletion of intracellular calcium stores have not been fully established. We report here that calcium-independent phospholipase A (iPLA(2)) is required for robust Ca(2+) entry in HaCaT keratinocytes following ATP or UTP stimulation. Lysophosphatidic acid...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.20993
更新日期:2007-06-01 00:00:00
abstract::Endothelial cells play a wide variety of critical roles in the control of vascular function. Indeed, since the early 1980s, the accumulating knowledge of the endothelial cell structure as well as of the functional properties of the endothelial cells shifted their role from a passive membrane or barrier to a complex ti...
journal_title:Journal of cellular physiology
pub_type: 杂志文章,评审
doi:10.1002/jcp.10333
更新日期:2003-09-01 00:00:00
abstract::Restenosis after angioplasty or stent is a major clinical problem. While long noncoding RNAs (lncRNAs) are implicated in a variety of diseases, their role in restenosis is not well understood. This study aims to investigate how dysregulated lncRNAs and messenger RNAs (mRNAs) contribute to restenosis. By microarray ana...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.28284
更新日期:2019-02-10 00:00:00
abstract::Estrogen has been shown to protect osteoblastic cells from apoptosis. Similarly, estrogen treatment preceding heat shock elevates heat shock protein 27 (hsp27) expression and increases thermoresistance in the murine estrogen receptor-transformed SMER14 osteoblastic cell line. Forced expression of hsp27 expression in o...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/1097-4652(200012)185:3<401::AID-JCP10>3.0.
更新日期:2000-12-01 00:00:00
abstract::The single-copy gene of human basic fibroblast growth factor (bFGF) encodes four co-expressed isoforms, with an apparent molecular weight (M(r)) of 24 kD, 22.5 kD, 22 kD, and 18 kD, co-translated from a single mRNA. As a tool for the study of the role exerted by the different bFGF isoforms in the biology of endothelia...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041610118
更新日期:1994-10-01 00:00:00
abstract::To determine if Chinese Hamster Ovary (CHO) cells in culture are able to metabolize steroids, CHO cells were incubated in defined medium with [14C]pregnenolone. As shown, [14C]pregnenolone is metabolized to progesterone and other delta 53 beta steroids; this steroidogenic response is appreciably enhanced upon exposure...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041080103
更新日期:1981-07-01 00:00:00
abstract::Runx2 and Runx3 are known to be expressed in the growth plate during endochondral bone formation. Here we addressed the functional role of Runx3 as distinct from Runx2 by using two models of postnatal bone repair: fracture healing that proceeds by an endochondral process and marrow ablation that proceeds by only an in...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.24396
更新日期:2013-11-01 00:00:00
abstract::Apoptosis constitutes a response of organisms to various physiological or pathological stimuli, and to different stresses. The ability of thermotolerance induced at a mild temperature of 40 degrees C to protect against activation of the apoptotic cascade by heat shock was investigated. When Chinese hamster ovary and h...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.20386
更新日期:2005-10-01 00:00:00
abstract::The biological actions of retinoids are mediated by nuclear retinoic acid receptors (RARs) and retinoid X receptors (RXRs). We have recently reported that decreased expression of RARα and RXRα has an important role in high glucose (HG)-induced cardiomyocyte apoptosis. However, the regulatory mechanisms of HG effects o...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.23005
更新日期:2012-06-01 00:00:00
abstract::The molecular weight of rat basic fibroblast growth factor is predicted to be 18 kDa when the amino acid sequence is read from the single AUG initiation codon found in the cDNA. DNA sequencing upstream of this AUG codon indicated, however, that there was an extended open reading frame. In vitro translation of the rat ...
journal_title:Journal of cellular physiology
pub_type: 杂志文章
doi:10.1002/jcp.1041480204
更新日期:1991-08-01 00:00:00