theophylline/cancer mamar

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Effect of aminoglutethimide on antipyrine, theophylline, and digitoxin disposition in breast cancer.

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The influence of aminoglutethimide (AG) on antipyrine, theophylline, and digitoxin kinetics was examined. Antipyrine was given as a single test dose before and after 3 mo of AG treatment, whereas theophylline and digitoxin kinetics were investigated at steady state in patients receiving these drugs

Effects of theophylline on radioiodide uptake in MCF-7 breast cancer and NIS gene-transduced SNU-C5 colon cancer cells.

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BACKGROUND We investigated whether theophylline has the potential to increase radioiodide uptake in nonthyroidal cancer cells. METHODS MCF-7 cells that express endogenous sodium/iodide symporter (NIS) and SNU-C5 cells adenovirally transduced with the human NIS gene (SNU-C5/NIS) were treated with

Antimitotic and cytotoxic effects of theophylline in MDA-MB-231 human breast cancer cells.

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A variety of cancer cell lines, including MDA-MB-231 human breast cancer cells, exhibit mitotic inhibition by cAMP. In earlier work, we found that the phosphodiesterase inhibitor, theophylline, reduced the number of cells and altered cellular morphology. In the current study, we evaluated the

Synergy of theophylline reduces necrotic effect of berberine, induces cell cycle arrest and PARP, HMGB1, Bcl-2 family mediated apoptosis in MDA-MB-231 breast cancer cells.

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Berberine, is a plant alkaloid, proved to have anticancer effect on various cancers. Theophylline (TH), a natural product, is widely used in the treatment of respiratory difficulties. The present study designed to elucidate the effects of theophylline and berberine combination on breast cancer cells

The disposition of theophylline in patients with lung and breast cancer.

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The influence of extrahepatic neoplastic disease on the biotransformation of theophylline was assessed by comparing the pharmacokinetic and metabolic profile of the drug in six patients with advanced breast or bronchial carcinoma, without detectable liver metastases, and in six appropriately matched

Theophylline exhibits anti-cancer activity via suppressing SRSF3 in cervical and breast cancer cell lines.

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Caffeine, theophylline, and theobromine are the most well-known members of methylxanthines. Caffeine-induced serine/arginine-rich splicing factor 2, SRSF2, and SRSF3 are required for the alternative splicing of a subset of cancer-associated genes. However, it remains to be investigated whether and

Effect of prolactin on growth and the estrogen receptor level of human breast cancer cells (MCF-7).

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The intracellular specific 17beta-estradiol binding in the human breast cancer cell line, MCF-7, was shown to be modified by prolactin. Both ovine and human prolactin doubled the estradiol receptor (E2R) level, but the latter was at least 10 times more stimulatory on a concentration basis. Most of

8-alkylthio-6-thio-substituted theophylline analogues as selective noncompetitive progesterone receptor antagonists.

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The progesterone receptor (PR) plays a key role in reproduction and is important in cancers of the reproductive tract. Current PR antagonists usually compete for progestin binding in the PR ligand-binding pocket and often exhibit cross-binding with other members of the steroid receptor family. Using

Prostaglandins as mediators of bone resorption in renal and breast tumours.

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Amounts of prostaglandin E and prostaglandin F have been measured by radioimmunoassay in extracts of renal cortical carcinoma and benign and malignant breast tumours after solvent extraction and column chromatography. 2. Substantial amounts of prostaglandin E were found in extracts of benign and

The pharmacologic effects of recombinant, human colony-stimulating factors and their modulation by theophylline.

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OBJECTIVE To investigate the effect of colony-stimulating factors (CSFs) on drug metabolism using theophylline as a substrate (phase I), and to evaluate the influence of theophylline on endogenous serum cytokine concentrations (phase II). METHODS Open-label, prospective study. METHODS The bone

Short-chain fatty acids exert opposite effects on the expression and function of p-glycoprotein and breast cancer resistance protein in rat intestine

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P-glycoprotein (P-gp) and breast cancer resistance protein (BCRP) are involved in intestinal barrier. Short-chain fatty acids (SCFAs) play important roles in maintaining intestinal barrier. In this study we explored how SCFAs affected the expression and function of intestinal P-gp and BCRP in rats.

Beta-adrenoceptor signaling and its control of cell replication in MDA-MB-231 human breast cancer cells.

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MDA-MB-231 human breast cancer cells express high beta-adrenoceptor levels, predominantly the beta2 subtype. Receptor stimulation by isoproterenol evoked immediate reductions in DNA synthesis which were blocked completely by propranolol and were of the same magnitude as effects elicited by high

Adenosine A2B receptor blockade slows growth of bladder and breast tumors.

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The accumulation of high levels of adenosine in tumors activates A(2A) and A(2B) receptors on immune cells and inhibits their ability to suppress tumor growth. Deletion of adenosine A(2A) receptors (A(2A)ARs) has been reported to activate antitumor T cells, stimulate dendritic cell (DC) function,

Generation of reactive oxygen species by xanthine derivatives in MDA-MB-231 human breast cancer cells.

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Theophylline reduces cell number in MDA-MB-231 cells through mechanisms over and above phosphodiesterase inhibition. In the current study, we used an intracellular fluorescent dye to show that theophylline and, to a much greater extent, 3-isobutyl-1-methylxanthine, evoke the generation of reactive

[Comparative study of the lymphocyte surface receptors isolated from the blood and tissue of malignant tumors].

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Comparative investigation of subpopulations and functional properties of lymphocytes isolated from the tumour tissue (TTL) as well as of lymphocytes of the peripheral blood (PBL) of 11 lung cancer patients and 18 breast cancer patients has shown that an increase in the quantity of

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