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tryptamine/рак
Врската е зачувана во таблата со исечоци
Страница 1 од 47 резултати
Cancer as the main aging factor for humans: the fundamental role of 5-methoxy-tryptamine in reversal of cancer-induced aging processes in metabolic and immune reactions by non-melatonin pineal hormones.
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Aging and advanced cancer are characterized by similar neuroendocrine and immune deficiencies; the most important of them consist of diminished nocturnal production of the pineal hormone melatonin (MLT) and decreased production of IL-2. At present, however, it is known that the pineal gland may
Tryptamine and dimethyltryptamine inhibit indoleamine 2,3 dioxygenase and increase the tumor-reactive effect of peripheral blood mononuclear cells.
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Indoleamine 2,3-dioxygenase (IDO) is an interferon-γ (IFN-γ)-induced tryptophan-degrading enzyme, producing kynurenine (KYN) that participates in the mechanism of tumor immune tolerance. Thus, IDO inhibition has been considered a strategy for anticancer therapy. The aim of this study was to identify
Bioinspired radical cyclization of tryptamines: synthesis of peroxypyrroloindolenines as potential anti-cancer agents.
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Inspired by the heme iron-catalyzed radical insertion of dioxygen to the tryptophan indole ring, herein we utilize alkylperoxy radical species as a coupling partner to trigger a peroxycyclization of readily accessible tryptophan derivatives and enable the first synthesis of peroxypyrroloindolenines.
Selective drug-induced reduction of blood flow in tumor transplants.
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The effect of a calcium antagonist and a physiologic amine on tumor and muscle perfusion was investigated with the aim of improving the preconditions for external hyperthermia treatment of cancer. Nisoldipine (0.04-4.0 mg/kg) and 5-hydroxy tryptamine (5-HT) (0.2-8.0 mg/kg) were administered i.p. in
[Effect of moxibustion on prevention and treatment of nausea and vomiting caused by cisplatin in lung cancer].
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OBJECTIVE
To observe the clinical effects between moxibustion combined with 5-hydroxy tryptamine (5-HT) receptor antagonist and simple 5-HT receptor antagonist in the prevention and treatment of nausea and vomiting caused by cisplatin chemotherapy in patients with lung cancer.
METHODS
Fifty-eight
Overexpression of a tryptophan decarboxylase cDNA in Catharanthus roseus crown gall calluses results in increased tryptamine levels but not in increased terpenoid indole alkaloid production.
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The enzyme tryptophan decarboxylase (TDC) (EC 4.1.1.28) catalyses a key step in the biosynthesis of terpenoid indole alkaloids in C. roseus by converting tryptophan into tryptamine. Hardly any tdc mRNA could be detected in hormone-independent callus and cell suspension cultures transformed by the
Simultaneous exposure to nicotine and hyperoxia causes tumors in hamsters.
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BACKGROUND
We have shown that the nicotine-derived nitrosamine 4-(methyl-nitrosamino)-3-(pyridyl)-1-butanone (NNK) causes a high incidence of neuroendocrine lung tumors in male Syrian golden hamsters when administered to animals maintained in an atmosphere of 60% hyperoxia. In vitro studies with
A longevity study with enhancer substances (selegiline, BPAP) detected an unknown tumor-manifestation-suppressing regulation in rat brain.
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OBJECTIVE
First proof to show that (-)-deprenyl/selegiline (DEP), the first selective inhibitor of MAO-B, later identified as the first β-phenylethylamine (PEA)-derived synthetic catecholaminergic activity enhancer (CAE) substance and (2R)-1-(1-benzofuran-2-yl)-N-propylpentane-2-amine (BPAP), the
A Review on Melatonin’s Effects in Cancer: Potential Mechanisms
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This systematic review aims to elucidate the role of melatonin (N-acetyl-5-metoxy-tryptamine) (MLT) in the prevention and treatment of cancer. MLT is a pineal gland secretory product, an evolutionarily highly conserved molecule; it is also an antioxidant and an impressive protector of mitochondrial
Tryptamine derived amides and acetogenins from the seeds of Rollinia mucosa.
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Bioactivity-directed fractionation of a CHCl(3)-MeOH (1:1) extract prepared from the seeds of Rollinia mucosa led to the isolation of a mixture of eight novel tryptamine amides. Extensive HPLC allowed the isolation of the major component of the mixture, which was characterized as
Naphthoindole-based analogues of tryptophan and tryptamine: synthesis and cytotoxic properties.
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The efficacy of anthracycline based anticancer drugs is limited by pleiotropic drug resistance of tumor cells. Aiming at the design of anthracyclinone congeners capable of circumventing drug resistance, we synthesized naphthoindole containing derivatives of tryptophan and tryptamine. In doing so we
New 3-tetrazolyl-β-carbolines and β-carboline-3-carboxylates with anti-cancer activity.
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The synthesis and in vitro anticancer activity of novel β-carbolines is reported. New tryptamines have been prepared via hetero-Diels-Alder reaction of nitrosoalkenes with indoles and used to prepare functionalized β-carbolines by the Pictet-Spengler approach. These included
Indole-3-acetic acid (IAA) biosynthesis in the smut fungus Ustilago maydis and its relevance for increased IAA levels in infected tissue and host tumour formation.
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Infection of maize (Zea mays) plants with the smut fungus Ustilago maydis is characterized by excessive host tumour formation. U. maydis is able to produce indole-3-acetic acid (IAA) efficiently from tryptophan. To assess a possible connection to the induction of host tumours, we investigated the
Melatonin is an appropriate candidate for breast cancer treatment: Based on known molecular mechanisms.
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Breast cancer is the most prevalent cancer and one of the most important causes of death in women throughout the world. Breast cancer risk factors include smoking, alcohol consumption, personal and family history, hypertension, and hormone therapy, long-term use of nonsteroidal anti-inflammatory
Design, synthesis and biological evaluation of tryptamine salicylic acid derivatives as potential antitumor agents.
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A series of tryptamine salicylic acid derivatives were synthesized and their antiproliferative activity against MGC-803, MCF-7, HepG2, A549 and HeLa cell lines was evaluated. The structure-activity relationship (SAR) study revealed that different substitutions of the C5 and C3'-C5' positions have
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