l asparagine/سرطان

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Efficacy of natural L-asparagine in the complex therapy for malignant tumors in experimental studies.

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OBJECTIVE To study the influence of natural L-asparagine on the efficacy of cytostatic therapy for malignant tumors in experimental investigations. METHODS Female C57B1/6 mice weighing 18-20 g were selected for the experiments. Lewis' lung carcinoma (LLC) and melanoma B16 cells were used in the

In vivo evaluation of poly-l-asparagine nanocapsules as carriers for anti-cancer drug delivery.

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Here, we report the in vivo proof of-concept of a novel nanocarrier, poly-l-asparagine (PASN) nanocapsules, as an anticancer targeted drug delivery system. The nanocapsules were loaded with the fluorescent marker DiD (1,1'-dioctadecyl-3,3,3',3'-tetramethylindodicarbocyanine perchlorate) and also

Pancreatic tumor sensitivity to plasma L-asparagine starvation.

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OBJECTIVE In this study, our aim was to test whether asparagine synthetase (ASNS) deficiency in pancreatic malignant cells can lead to sensitivity to asparagine starvation. We also investigated, in tumor-bearing mice, the efficacy of L-asparaginase entrapped in red blood cells (RBCs), a safe

Anti-tumour activity of carbobenzoxy-L-asparagine.

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Inhibitors of L-asparagine synthetase, in vitro.

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A systematic search has been made for inhibitors of L-asparagine synthetase (L-glutamine hydrolyzing, EC 6.3.5.4) from leukemia 5178Y/AR, a rodent neoplasm resistant to the oncolytic enzyme L-asparaginase (EC 3.5.1.1), The classes of chemicals examined in this search included substrate and product

Tumor inhibitory and non-tumor inhibitory L-asparaginases from Pseudomonas geniculata.

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Two enzymes that catalyze the hydrolysis of l-asparagine have been isolated from extracts of Pseudomonas geniculata. After initial salt fractionation, the enzymes were separated by chromatography on diethylaminoethyl-Sephadex and purified to homogeneity by gel filtration, ion-exchange

Bacterial l-asparaginases for cancer therapy: Current knowledge and future perspectives.

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l-Asparaginases hydrolyzing plasma l-asparagine and l-glutamine has attracted tremendous attention in recent years owing to remarkable anticancer properties. This enzyme is efficiently used for acute lymphoblastic leukemia (ALL) and lymphosarcoma and emerged against ALL in children, neoplasia, and

A phase I and pharmacodynamic evaluation of polyethylene glycol-conjugated L-asparaginase in patients with advanced solid tumors.

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OBJECTIVE To evaluate the in vitro activity of polyethylene glycol-conjugated L-asparaginase (PEG-Lasparaginase) against fresh human tumor specimens, using the human tumor clonogenic assay (HTCA), and to perform a phase I dose-escalation clinical trial of PEG-L-asparaginase. The goal of the clinical

Analogs of L-aspartic acid in chemotherapy for cancer.

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The interaction of analogs of L-aspartic acid with adenylosuccinic acid synthetase, L-asparagine synthetase, and L-aspartic acid transcarbamylase is discussed. Each of these enzymes is of critical importance in the economy of certain types of tumor cells. L-Alanosine, a new antitumor antibiotic, is

Poly-L-asparagine nanocapsules as anticancer drug delivery vehicles.

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This work presents for the first time the development of novel poly-L-asparagine (PASN) nanocapsules and the in vitro evaluation of their potential as anticancer drug delivery systems. The design of PASN nanocapsules was inspired by the well-known avidity of cancer cells for the amino acid

l-asparaginase induces intrinsic mitochondrial-mediated apoptosis in human gastric adenocarcinoma cells and impedes tumor progression.

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l-asparagine essentially regulates growth and proliferation of cancer cells. l-asparaginase is an anti-cancer enzyme that deprives the cancer cells of l-asparagine. The purpose of this study was to explore the mechanism of a novel l-asparaginase from Pseudomonas fluorescens on l-asparagine

Optimizing the dosing schedule of l-asparaginase improves its anti-tumor activity in breast tumor-bearing mice.

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Proliferation of acute lymphoblastic leukemic cells is nutritionally dependent on the external supply of asparagine. l-asparaginase, an enzyme hydrolyzing l-asparagine in blood, is used for treatment of acute lymphoblastic leukemic and other related blood cancers. Although previous studies

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

pH sensitive core-shell magnetic nanoparticles for targeted drug delivery in cancer therapy.

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In the last decade, nanobiotechnology has evolved rapidly with an extensive impact on biomedical area. In order to improve bioavailability and minimize adverse effects, drug delivery systems based on magnetic nanocomposites are under development mainly for cancer imaging and antitumor therapy. In

Penetration into Cancer Cells via Clathrin-Dependent Mechanism Allows L-Asparaginase from Rhodospirillum rubrum to Inhibit Telomerase

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The anticancer effect of L-asparaginases (L-ASNases) is attributable to their ability to hydrolyze L-asparagine in the bloodstream and cancer cell microenvironment. Rhodospirillum rubrum (RrA) has dual mechanism of action and plays a role in the suppression of telomerase activity. The aim of

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