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Fibroblasts induce epithelial to mesenchymal transition in breast tumor cells which is prevented by fibroblasts treatment with histamine in high concentration.

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Epithelial to mesenchymal transition (EMT) of cancer cells is an essential process in cancer progression. Cancer cells that undergone EMT loose cell-cell contacts, acquire mesenchymal properties and develop migratory and invasive abilities. In previous studies we have demonstrated that histamine may

Histamine, mast cells and tumour cell proliferation in breast cancer: does preoperative cimetidine administration have an effect?

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Endogenous histamine has been shown to effect growth mechanisms in experimental mammary carcinomas via H2 membrane receptors (Cricco et al, 1994). Both H1 and H2 binding sites are present in human mammary glands but only 75% malignant carcinomas express H2 receptors (Lemos et al, 1995). The presence

Histamine prevents radiation-induced mesenchymal changes in breast cancer cells.

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Radiotherapy is a prime option for treatment of solid tumors including breast cancer though side effects are usually present. Experimental evidence shows an increase in invasiveness of several neoplastic cell types through conventional tumor irradiation. The induction of epithelial to mesenchymal

Histamine synthesis and content in benign and malignant breast tumours. Its effects on other host tissues.

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We studied 100 patients: 40 with breast cancer, 41 with benign breast tumours and 19 non-cancer-bearing cholecystectomy patients, in order to measure the histidine decarboxylase activity and histamine content in benign and malignant breast tumours, and to determine whether the histamine metabolism

Changes in histamine synthesis, tissue content and catabolism in human breast cancer.

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The present study in 10 breast cancer patients supports the concept that newly synthetized, nascent histamine is involved in tumour growth. Histidine decarboxylase (HDC) activity is increased in mammary tumour tissue compared to healthy mammary gland-, skin- and muscle tissue in all but one patient

[Histamine-receptor sensitivity of lymphocytes in patients with early and advanced stage breast cancer].

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It is established that histamine in the concentration of 10(-4)-10(-5) M possesses an inhibitory effect in the lymphocyte adherence inhibition test in patients with breast cancer. Using specific antagonists (H1-blocker dimedrol and H2-blocker cimetidine) it is shown that the revealed histaminergic

Histamine in human breast cancer.

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BACKGROUND Histamine inhibits lymphocyte function in vitro at concentrations of greater than 10(-6) mol/l. The aim of this study was to determine whether histamine concentrations in breast cancers were sufficient to produce an immunological effect. METHODS Tumour and adjacent normal breast content

Histamine-functionalized copolymer micelles as a drug delivery system in 2D and 3D models of breast cancer.

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Histamine functionalized block copolymers based on poly(allyl glycidyl ether)-b-poly(ethylene oxide) (PAGE-b-PEO) were prepared with different ratios of histamine and octyl or benzyl groups using UV-initiated thiol-ene click chemistry. At neutral pH, the histamine units are uncharged and

Histamine H4 receptor agonists induce epithelial-mesenchymal transition events and enhance mammosphere formation via Src and TGF-β signaling in breast cancer cells

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Epithelial-mesenchymal transition (EMT) contributes to cell invasion and metastasis during the progression of epithelial cancers. Though preclinical evidence suggests a role for histamine H4 receptor (H4R) in breast cancer growth, its function in the EMT is less known. In this study we proposed to

Lack of Association between rs2067474 Polymorphism in Histamine Receptor H2 Gene and Breast Cancer in Chinese Han Population.

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Histamine H2 receptor (HRH2) was previously suggested to affect the proliferation of breast cancer cells and disease-free survival of breast cancer patients. Furthermore, a common polymorphism, rs2067474, was identified in an enhancer element of the HRH2 gene promoter and was reported to be

Associations of polymorphisms in histidine decarboxylase, histamine N-methyltransferase and histamine receptor H3 genes with breast cancer.

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We previously found that genetic polymorphisms in gene coding for histamine H4 receptors were related to the risk and malignant degree of breast cancer. The roles of polymorphisms in other histamine-related genes, such as histidine decarboxylase (HDC), histamine N-methyltransferase (HNMT) and

The intracellular histamine antagonist, N,N-diethyl-2-[4-(phenylmethyl)phenoxy] ethamine.HCL, may potentiate doxorubicin in the treatment of metastatic breast cancer: Results of a pilot study.

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N,N-diethyl-2-[4-(phenylmethyl)phenoxy] ethanamine.HCl (DPPE) is a diphenylmethane analog of tamoxifen that antagonizes the intracellular binding of histamine to growth-regulatory sites, a proportion of which represents P450 enzymes, in microsomes and nuclei. We previously reported increased

Metabolome Analysis Reveals Dermal Histamine Accumulation in Murine Dermatitis Provoked by Genetic Deletion of P-Glycoprotein and Breast Cancer Resistance Protein.

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P-glycoprotein (P-gp) and breast cancer resistance protein (BCRP) are xenobiotic transporters which pump out variety types of compounds, but information on their interaction with endogenous substrates in the skin is limited. The purpose of the present study was to clarify possible

Concentration of histamine in serum and tissues of the primary ductal breast cancers in women.

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The aim of this study was to evaluate the concentration of histamine (HA) and the activities of their enzymes, namely histidine decarboxylase (HDC) and diaminooxydase (DAO) in 95 women with ductal breast cancer and in healthy women. The control group comprised 60 women without any pathological

Metabolism of histamine in tissues of primary ductal breast cancer.

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Histamine performs an important role in the pathologic and physiologic aspects of the breast gland. Among monoamines, histamine demonstrates the greatest proliferative activity in breast cancer. The aim of the study was to evaluate histamine concentration in plasma and tissues of breast cancer

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