Abstract:
:Gastrin is mitogenic for several colon cancers and is postulated as an autocrine growth factor for colon cancer cells. In the present study we report the development of a simple competitive polymerase chain reaction (PCR) method for measuring relative abundance of gastrin gene expression in colon cancer cells. Primers flanking exons 2 and 3 of the gastrin gene were utilized for co-amplification of cDNA and genomic DNA. The amplification of genomic DNA was distinguished from that of cDNA by the presence of the 130 bp intron sequence which was resolved by electrophoresis on agarose gels. A standard reaction of competitive PCR, using known concentrations of genomic DNA and cDNA, was first established. The steady state levels of gastrin mRNA were next quantitated in three human colon cancer cell lines (HCT-116, Colo-205 and DLD-1) by competitive PCR. Gastrin mRNA levels in these cell lines ranged from approximately 0.1 to 1.0 fmoles/mg total RNA (approximately 2-25 copies of gastrin mRNA per cell). Thus low to moderate levels of gastrin were expressed by human colon cancer cell lines which may function as autocrine growth factors for colon cancers.
journal_name
Life Scijournal_title
Life sciencesauthors
Xu Z,Dai B,Dhruva B,Singh Pdoi
10.1016/0024-3205(94)00550-8subject
Has Abstractpub_date
1994-01-01 00:00:00pages
671-8issue
10eissn
0024-3205issn
1879-0631pii
0024-3205(94)00550-8journal_volume
54pub_type
杂志文章相关文献
LIFE SCIENCES文献大全abstract:AIMS:slc26a proteins are responsible for a large number of functions either in normal physiology or in human disease. We have previously reported that proximal tubular epithelial (PTE) cells immortalized from spontaneously hypertensive rats (SHRs) were endowed with increased Cl(-)/HCO3(-) exchanger activity and slc26a6...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2013.07.026
更新日期:2013-10-06 00:00:00
abstract:AIMS:To potentiate the well-documented tumor protecting ability of paullones, literatures demand for rational modifications in paullone ring structure and exploration of a precise mechanism underlying their antitumor effects. Thus, recently we synthesized novel paullone-like scaffold, 5H-benzo [2, 3][1,4]oxazepino[5,6-...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2018.02.029
更新日期:2018-05-15 00:00:00
abstract::Neuropathic pain syndromes respond poorly to opioid treatment. In our previous studies, we found that intrathecal (i.t.) injection of pertussis toxin (PTX) produces thermal hyperalgesia, which is poorly responsive to morphine and is accompanied by an increase in cerebrospinal fluid (CSF) levels of excitatory amino aci...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2005.08.020
更新日期:2006-03-13 00:00:00
abstract::Several recent reports indicate that patients with Huntington's Disease (HD) may manifest membrane abnormalities in a wide variety of cells including peripheral blood lymphocytes. In this study, flow cytometry is used in conjunction with the fluorescent membrane probe, 8-anilino-1-naphthalene sulfonate (ANS), to exami...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(85)90165-1
更新日期:1985-02-18 00:00:00
abstract::The effects of unilateral intracarotid administration of MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine) in sheep were studied with the goal of producing a non-primate, large animal model of Parkinson's Disease. Adult female sheep were given an acute (over 30 min) or chronic (over 1 week) injection of MPTP (0.4-5....
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(94)00406-4
更新日期:1994-01-01 00:00:00
abstract:AIMS:Amino acids, especially branched chain amino acids (BCAAs), have important regulatory roles in protein synthesis. Recently studies revealed that BCAAs protect against ischemia/reperfusion (I/R) injury. We studied the signaling pathway and mitochondrial function affecting a cardiac preconditioning of BCAAs. MAIN M...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2020.117368
更新日期:2020-03-15 00:00:00
abstract::Embryonic heart development is a very complicated process regulated precisely by a network composed of many genes and signaling pathways in time and space. Forkhead box (Fox, FOX) proteins are a family of transcription factors characterized by the presence of an evolutionary conserved "forkhead"or "winged-helix" DNA-b...
journal_title:Life sciences
pub_type: 杂志文章,评审
doi:10.1016/j.lfs.2015.12.001
更新日期:2016-01-01 00:00:00
abstract:AIMS:Asymmetric dimethylarginine (ADMA), an endogenous nitric oxide synthase inhibitor, has been reported to be a novel marker for the progression of chronic kidney disease (CKD). We have recently found that accumulation of ADMA could trigger peritubular capillary loss, thus contributing to tubulointerstitial ischemia ...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2009.03.018
更新日期:2009-06-05 00:00:00
abstract::The time course of regional mouse brain distribution of radioactivity after i.v. injection of a tracer dose of [11C]tetrabenazine ([11C]TBZ) has been determined. Radiotracer uptake into brain is rapid, with 3.2% injected dose in the brain at 2 min. Egress from the brain is also very rapid, with only 0.21% of the injec...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(92)90228-h
更新日期:1992-01-01 00:00:00
abstract::Effects of hexamethonium (C6) on the excitability of sympathetic ganglion cells were examined by means of intracellular recording. When DC currents were injected, high concentrations of C6 significantly augmented the repetitive firing of the cells without any change in threshold voltage for initiation of the spike. Th...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(85)90324-8
更新日期:1985-06-17 00:00:00
abstract::Metabolic flux through the purine salvage pathway appears to modulate superoxide secretion by elicited macrophages. Exogenous adenosine, the first substrate of this pathway, stimulates superoxide secretion, and Allopurinol, a specific inhibitor of xanthine oxidase, inhibits superoxide secretion. The effects of these a...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(83)90811-1
更新日期:1983-03-21 00:00:00
abstract::Convulsive seizures are a potential side effect of antidepressant drug treatment and can be produced by all classes of antidepressants. It is also known that some convulsant and anticonvulsant drug actions are mediated by the GABA-receptor chloride-ionophore complex. Drugs acting at this complex appear to induce convu...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(88)90107-5
更新日期:1988-01-01 00:00:00
abstract::Excessive fibrosis and extracellular matrix deposition resulting from upregulation of target genes expression mediated by transforming growth factor-beta (TGF-β)/SMAD and hypoxia inducible factor-1 (HIF-1) signaling pathways are the main mechanisms that drive keloid formation. Sumoylation is a protein posttranslationa...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2020.117859
更新日期:2020-08-15 00:00:00
abstract:AIMS:Oxidative stress is involved in cholestasis-induced hepatic damage. Therefore, antioxidant therapy is a recommended therapeutic strategy. Studies have illustrated that chromium can enhance antioxidative capacity leading to a resolution of oxidative stress. The aim of this study was to assess whether chromium has p...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2009.02.003
更新日期:2009-04-24 00:00:00
abstract:AIMS:Enhanced aerobic glycolysis is an essential hallmark of malignant cancer. Blocking the glycolytic pathway has been suggested as a therapeutic strategy to impair the proliferation of tumor cells. Metformin, a widely used anti-diabetes drug, exhibits anti-tumor properties. However, the underlying molecular mechanism...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2019.116966
更新日期:2019-12-15 00:00:00
abstract::We investigated whether calcium channel antagonists would alter the induction of nitric oxide (NO) synthesis by bacterial lipopolysaccharide (LPS) alone or in combination with interferon-gamma (IFN gamma) in cultured J774 macrophages, rat vascular smooth muscle cells, rat renal mesangial cells, and rat cardiac myocyte...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(95)02163-d
更新日期:1995-01-01 00:00:00
abstract::Clinical studies of cholinergic pharmacotherapy, together with the putative role of the muscarinic receptor system in the neurophysiology of human behavior, support a possible muscarinic cholinergic involvement in schizophrenia. The present study has measured the density of [3H]AF-DX 384 labelled receptors (muscarinic...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(99)00114-9
更新日期:1999-01-01 00:00:00
abstract::Contractile responses to norepinephrine (NE), and the population of beta-adrenoceptors, were determined in gastric fundus smooth muscle from rats with diabetes induced by streptozotocin (STZ), and age-matched controls. Relaxation and/or contraction of fundus strips of controls and diabetics were induced by 10(-5)M NE....
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(91)90505-6
更新日期:1991-01-01 00:00:00
abstract:AIMS:To investigate the effects of high doses of pentazocine on antinociception induced by a high dose of morphine and the role of the kappa-opioid receptors (KORs) in these effects in mice. MAIN METHODS:Sixty-six C57BL/6J mice were pretreated with a KOR antagonist, nor-binaltorphimine (nor-BNI) (10mg·kg(-1)), or a no...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2015.02.023
更新日期:2015-06-01 00:00:00
abstract::Recent studies have shown that acyl-CoA:cholesterol acyltransferase (ACAT) plays an important role in the initiation of diabetes-associated hypercholesterolemia. To confirm this hypothesis, effects of a potent ACAT inhibitor, FR145237, on diet-induced hypercholesterolemia were examined in streptozotocin (STZ)-induced ...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(96)00658-3
更新日期:1997-01-01 00:00:00
abstract:OBJECTIVE:To explore the correlation of the viscus fat area (VFA) with the Framingham 10-year general cardiovascular disease risk in patients with type 2 diabetes mellitus (T2DM). METHODS:A total of 202 patients with T2DM were divided into two groups based on VFA (a VFA ≥ 100 cm2 group and a VFA < 100 cm2 group), or f...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2019.01.036
更新日期:2019-03-01 00:00:00
abstract::In adult male Wistar rats submitted to a standardized noise stress, intravenous TRH induced a prolactin (PRL) secretory response. Prior IV naloxone administration not only lowered plasma PRL levels in those stressed rats but abolished also the stimulatory action of TRH. This effect was further studied by superfusion e...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(87)90756-9
更新日期:1987-06-22 00:00:00
abstract:AIM:This study aimed to evaluate the effects of Wortmannin, an inhibitor of phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt), on aortic hyporeactivity to Phenylephrine (Phe) and nitric oxide bioavailability associated with pregnancy in hypertensive rats. MAIN METHODS:The intact aortic rings of pregnant and ...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2014.12.014
更新日期:2015-02-01 00:00:00
abstract::This paper describes a new formulation for triggered delivery of insulin which consisted of magnetic particles dispersed in alginate spheres. When magnetic field was applied to that system, the release rate of insulin was about 50 times higher than in the absence of magnetic field. The influence of oscillating magneti...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(88)90009-4
更新日期:1988-01-01 00:00:00
abstract:AIMS:Endothelin A receptor (ET(A)R) and epidermal growth factor receptor (EGFR) cross-talk enhances the metastatic potential of epithelial ovarian cancer (EOC) cells activating different pathways, including β-catenin signalling. Here, we evaluated β-catenin as one of ET(A)R/EGFR downstream pathway in the invasive behav...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2012.03.023
更新日期:2012-10-15 00:00:00
abstract::The effect of gamma-aminobutyric acid (GABA) on the binding of PK 8165, a quinoline derivative, and CGS 8216, a pyrazoloquinoline, was assessed in two different regions of the rat brain. PK 8165, a compound with reported anxiolytic properties, inhibited [3H]-propyl beta-carboline-3-carboxylate labeled receptors in the...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(82)90403-9
更新日期:1982-07-05 00:00:00
abstract::Intravenous (IV) administration of 10 ug/kg of morphine sulfate increased the firing rate of Type A dopamine neurons but decreased the extracellular activity of Type B dopamine cells in the substantia nigra pars compacta and ventral tegmental area of anesthetized male rats. The morphine-produced increase in Type A cel...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(82)90153-9
更新日期:1982-11-15 00:00:00
abstract:AIMS:The study investigated the antidepressant-like effect and acute toxicity of 4-phenyl-1-(phenylselanylmethyl)-1,2,3-triazole (Se-TZ), an organoselenium-containing heterocycle compound in mice. MAIN METHODS:The antidepressant-like effect of Se-TZ (1-50mg/kg) and its mechanism of action, was analyzed in the tail sus...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2013.07.024
更新日期:2013-09-17 00:00:00
abstract::Histidine decarboxylase (HDC) activity and histamine content were measured in endoscopic gastric biopsy specimens of 19 control subjects with normogastrinemia and 6 patients with hypergastrinemia. In controls, the HDC activity was 3 fold higher in fundic mucosa (120 +/- 13 fmol/min/mg protein, mean +/- S.E.) than in a...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(91)90424-a
更新日期:1991-01-01 00:00:00
abstract::The systemic administration of neurotensin (NT) dose-dependently increased plasma adrenocorticotropin (ACTH) concentration in rats, and this effect was annulled by (alpha-helical)-CRH9-41, an antagonist of corticotropin-releasing hormone (CRH). The systemic administration of [D-Trp11]-neurotensin (NT-A), a specific NT...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(92)90250-s
更新日期:1992-01-01 00:00:00