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l isoleucine/krebs
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14 Ergebnisse
[The difference of drug sensitivity of tumor cells on N-ethyloxycarbonylaminomethyl-L-isoleucine (A-145 (author's transl)].
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N-Ethyloxycarbonylaminomehyl-L-isoleucine (A-145), a novel antitumor amino acid derivative, is an anti-tumor agent effect in cases of Ehrlich ascites rather than against Sarcoma-180. The chemotherapeutic index of A-145 was 14.9 for Ehrlich ascites carcinoma and 4.2 for ascites Sarcoma-180.
Lack of carcinogenicity of L-isoleucine in F344/DuCrj rats.
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The carcinogenic potential of L-isoleucine, used as a food fortifier, was examined in both sexes of F344 rats. Groups of 50 female and 50 male animals were given diet containing L-isoleucine at concentrations of 0%, 2.5% or 5.0%. No treatment-related changes in the survival rate, general condition,
Detection of amino acids as possible promoters of bladder cancer in rats by measuring their enhancement of agglutination of bladder cells by concanavalin A.
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The effects of amino acids on the enhanced agglutinability of bladder cells with concanavalin A induced by subcarcinogenic treatment with N-butyl-N-(4-hydroxybutyl)nitrosamine were examined. The amino acids examined were L-alanine, L-arginine, L-asparagine, L-aspartic acid, L-cysteine, L-glutamic
The accumulation of amino acids by mouse ascites-tumour cells. Dependence on but lack of equilibrium with the sodium-ion electrochemical gradient.
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1. The fluorescent dye 3,3'-dipropyloxadicarbocyanine was used to show that the tumour cells absorbed 2-aminoisobutyrate, glycine, L-leucine and L-isoleucine and certain other amino acids electrogenically. The Km values with respect to amino acid concentration ([A]o), obtained from the fluorescence
Injectable delivery system of 2-methoxyestradiol for breast cancer therapy using biodegradable thermosensitive poly(organophosphazene) hydrogel.
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2-Methoxyestradiol (2-ME) has been reported to have antiangiogenic and antitumor activity. Its biomedical application is limited due to its poor water solubility resulting in its low bioavailability. Poly(organophosphazenes) containing l-isoleucine ethyl ester, ethyl-2-(O-glycyl)lactate, and
Antitumor activity of selected amino acid derivatives against various tumor systems.
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We have previously reported that from 350 amino acid (A-A) derivatives five were selected after the primary in vivo and in vitro screening tests. The five compounds which were found to possess potential antitumor activity against Ehrlich ascites carcinoma are as follows:
Doxorubicin-polyphosphazene conjugate hydrogels for locally controlled delivery of cancer therapeutics.
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Poly(organophosphazene)-doxorubicin (DOX) conjugate bearing hydrophobic L-isoleucine ethyl ester (IleOEt) and hydrophilic alpha-amino-omega-methoxy-poly(ethylene glycol) with molecular weight of 550 Da (AMPEG 550) along with carboxylic acid as a functional group was synthesized to create a drug
Effects of dietary L-isoleucine on laying performance and immunomodulation of laying hens.
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Isoleucine may be a limiting amino acid for laying hens fed diets with a lowered protein level. An experiment was conducted to examine laying performance and the immune function of laying hens provided diets varying in digestible isoleucine levels during the peak production period. A total number of
Metabolic changes in rats after intragastric administration of MGCD0103 (Mocetinostat), a HDAC class I inhibitor.
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MGCD0103, an isotype-selective HDACi, has been clinically evaluated for the treatment of hematologic malignancies and advanced solid tumors, alone and in combination with standard-of-care agents. In this study, we developed a serum metabolomic method based on gas chromatography-mass spectrometry
Fanconi Anemia complementation group C protein in metabolic disorders.
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Given importance of 22-Fanconi Anemia (FA) proteins together to act in a signaling pathway in preventing deleterious clinical symptoms, e.g. severe bone marrow failure, congenital defects, an early onset of aging and cancer, studies on each FA protein become increasingly attractive. However, an
Biosynthesis of trioxacarcin revealing a different starter unit and complex tailoring steps for type II polyketide synthase.
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Trioxacarcins (TXNs) are highly oxygenated, polycyclic aromatic natural products with remarkable biological activity and structural complexity. Evidence from 13C-labelled precursor feeding studies demonstrated that the scaffold was biosynthesized from one unit of l-isoleucine and nine units of
Antitumor activity of amino acid derivatives in the primary screening.
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Approximately 350 amino acid derivatives were synthesized and tested for antitumor activity in four tumor systems. The effect on life prolongation and tumor growth was examined using mouse leukemia SR-61, Ehrlich ascites carcinoma, ascites sarcoma-180, and rat ascites hepatoma (AH-60C). Among these
The SARP Family Regulator Txn9 and Two-Component Response Regulator Txn11 are Key Activators for Trioxacarcin Biosynthesis in Streptomyces bottropensis.
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Trioxacarcin A is a polyoxygenated, structurally complex antibiotic produced by Streptomyces spp., which possesses high anti-bacterial, anti-malaria, and anti-tumor activities. The trioxacarcin biosynthetic pathway involves type II polyketide synthases (PKSs) with L-isoleucine as a unique starter
Human antimicrobial peptides in ocular surface defense.
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Sight depends on the passage of light through the transparent cornea and being focused on the fovea. Its exposed position renders it vulnerable to microbial infection. The cornea has developed a wide array of defense mechanisms against infection, of which endogenous antimicrobial peptides (AMPs) are
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