keyword
MENU ▼
Read by QxMD icon Read
search

l-asparaginase

keyword
https://www.readbyqxmd.com/read/27908241/molecular-cloning-biochemical-characterization-and-antitumor-properties-of-a-novel-l-asparaginase-from-synechococcus-elongatus-pcc6803
#1
R Kebeish, A El-Sayed, H Fahmy, A Abdel-Ghany
L-asparaginase (EC 3.5.1.1), which catalyzes the deamidation of L-asparagine to L-aspartic acid and ammonia, has been widely used as a key therapeutic tool in the treatment of tumors. The current commercially available L-asparaginases, produced from bacteria, have signs of toxicity and hypersensitivity reactions during the course of tumor therapy. Therefore, searching for L-asparaginases with unique biochemical properties and fewer adverse effects was the objective of this work. In this study, cyanobacterial strain Synechococcus elongatus PCC6803 was found as a novel source of L-asparaginase...
October 2016: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/27902457/tfdp3-confers-chemoresistance-in-minimal-residual-disease-within-childhood-t-cell-acute-lymphoblastic-leukemia
#2
Ming Chu, Kailin Yin, Yujun Dong, Pingzhang Wang, Yun Xue, Peng Zhou, Yuqi Wang, Yuedan Wang
Acquired drug resistance in childhood T-cell acute lymphoblastic leukemia (T-ALL) remains a significant clinical problem. In this study, a novel gene therapy target for childhood T-ALL to overcome chemoresistance was discovered: TFDP3 increased in the minimal residual disease (MRD) positive childhood T-ALL patients. Then, we established a preclinical model of resistance to induction therapy to examine the functional relevance of TFDP3 to chemoresistance in MRD derived from Jurkat/E6-1. Jurkat xenografts in NOD/SCID mice were exposed to a four drug combination (VXLD) of vincristine (VCR), dexamethasone (DEX), L-asparaginase (L-asp) and daunorubicin (DNR)...
November 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27895780/curcumin-potentiates-the-effect-of-chemotherapy-against-acute-lymphoblastic-leukemia-cells-via-downregulation-of-nf-%C3%AE%C2%BAb
#3
Helia Judith Pimentel-Gutiérrez, Lucina Bobadilla-Morales, César Cenobio Barba-Barba, Citlalli Ortega-De-La-Torre, Fernando Antonio Sánchez-Zubieta, Jorge Román Corona-Rivera, Betsy Annel González-Quezada, Juan S Armendáriz-Borunda, Rocío Silva-Cruz, Alfredo Corona-Rivera
Acute lymphoblastic leukemia (ALL) accounts for 30% of all pediatric cancers. Currently available treatments exhibit toxicity and certain patients may develop resistance. Thus, less toxic and chemoresistance-reversal agents are required. In the present study, the potential effect of curcumin, a component of Curcuma longa, as a pharmacological co-adjuvant of several chemotherapeutic agents against ALL, including prednisone, 6-mercaptopurine, dexamethasone, cyclophosphamide, l-asparaginase, vincristine, daunorubicin, doxorubicin, methotrexate and cytarabine, was investigated in the REH ALL cell line cultures treated in combination with chemotherapeutic agents and curcumin...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27885727/growth-inhibitory-and-proapoptotic-effects-of-l-asparaginase-from-fusarium-culmorum-asp-87-on-human-leukemia-cells-jurkat
#4
Anil Kumar Meghavarnam, Maryam Salah, Meenakshisundaram Sreepriya, Savitha Janakiraman
The objective of this study was to evaluate the anticancer properties of L-asparaginase purified from fungal isolate Fusarium culmorum ASP-87 against human T-cell leukemia cell line (Jurkat). The growth inhibitory and proapoptotic effects of purified L-asparaginase on Jurkat cell lines were investigated by determining its influence on cell viability, colony formation, DNA fragmentation and cell cycle progression. The results revealed that purified L- asparaginase showed significant decrease in cell survival with IC50 value of 90μg/ml(9 IU/ml)...
November 25, 2016: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/27866936/current-applications-and-different-approaches-for-microbial-l-asparaginase-production
#5
REVIEW
Jorge Javier Muso Cachumba, Felipe Antonio Fernandes Antunes, Guilherme Fernando Dias Peres, Larissa Pereira Brumano, Júlio César Dos Santos, Silvio Silvério Da Silva
l-asparaginase (EC 3.5.1.1) is an enzyme that catalysis mainly the asparagine hydrolysis in l-aspartic acid and ammonium. This enzyme is presented in different organisms, such as microorganisms, vegetal, and some animals, including certain rodent's serum, but not unveiled in humans. It can be used as important chemotherapeutic agent for the treatment of a variety of lymphoproliferative disorders and lymphomas (particularly acute lymphoblastic leukemia (ALL) and Hodgkin's lymphoma), and has been a pivotal agent in chemotherapy protocols from around 30 years...
October 27, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/27863173/heterologous-expression-and-purification-of-active-l-asparaginase-i-of-saccharomyces-cerevisiae-in-escherichia-coli-host
#6
João H P M Santos, Iris M Costa, João V D Molino, Mariana S M Leite, Marcela V Pimenta, João A P Coutinho, Adalberto Pessoa, Sónia P M Ventura, André M Lopes, Gisele Monteiro
L-asparaginase (ASNase) is a biopharmaceutical widely used to treat child leukemia. However, it presents some side effects, and in order to provide an alternative biopharmaceutical, in this work, the genes encoding ASNase from Saccharomyces cerevisiae (Sc_ASNaseI and Sc_ASNaseII) were cloned in the prokaryotic expression system Escherichia coli. In the 93 different expression conditions tested, the Sc_ASNaseII protein was always obtained as an insoluble and inactive form. However, the Sc_ASNaseI (His)6 -tagged recombinant protein was produced in large amounts in the soluble fraction of the protein extract...
November 14, 2016: Biotechnology Progress
https://www.readbyqxmd.com/read/27849183/contribution-of-asparagine-catabolism-to-salmonella-virulence
#7
Patrick A McLaughlin, Michael McClelland, Hee-Jeong Yang, Steffen Porwollik, Lydia Bogomolnaya, Juei-Suei Chen, Helene Andrews-Polymenis, Adrianus W M van der Velden
Salmonellae are pathogenic bacteria that cause significant morbidity and mortality in humans worldwide. Salmonellae establish infection and avoid clearance by the immune system by mechanisms that are not well understood. We previously showed that L-Asparaginase II produced by Salmonella enterica serovar Typhimurium (S Typhimurium) inhibits T cell responses and mediates virulence. In addition, we previously showed that asparagine deprivation such as that mediated by L-Asparaginase II of S Typhimurium causes suppression of activation-induced T cell metabolic reprogramming...
November 14, 2016: Infection and Immunity
https://www.readbyqxmd.com/read/27844015/l-asparaginase-production-in-the-pseudomonas-pseudoalcaligenes-strain-jhs-71-isolated-from-jooshan-hot-spring
#8
Arastoo Badoei-Dalfard
L-asparaginase has lots of medical and industrial applications. Ever since L-asparaginase anti-tumor activity was first demonstrated, its production using microbial systems has attracted considerable attention owing to their cost-effective and eco-friendly nature. The aim of this study is to obtain L-asparaginase producing bacteria and determining the enzyme activity. Samples were picked up from Jooshan hot springs located in the Sirch, Kerman. The L-asparaginase producing bacteria were screened on the agar medium supplied with L-asparagine and phenol red indicator dye (pH-7...
March 2016: Molecular Biology Research Communications
https://www.readbyqxmd.com/read/27824095/recombinant-l-asparaginase-1-from-saccharomyces-cerevisiae-an-allosteric-enzyme-with-antineoplastic-activity
#9
Iris Munhoz Costa, Leonardo Schultz, Beatriz de Araujo Bianchi Pedra, Mariana Silva Moreira Leite, Sandra H P Farsky, Marcos Antonio de Oliveira, Adalberto Pessoa, Gisele Monteiro
L-asparaginase (L-ASNase) (EC 3.5.1.1) is an important enzyme for the treatment of acute lymphoblastic leukaemia. Currently, the enzyme is obtained from bacteria, Escherichia coli and Erwinia chrysanthemi. The bacterial enzymes family is subdivided in type I and type II; nevertheless, only type II have been employed in therapeutic proceedings. However, bacterial enzymes are susceptible to induce immune responses, leading to a high incidence of adverse effects compromising the effectiveness of the treatment...
November 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27813440/amino-acid-deprivation-using-enzymes-as-a-targeted-therapy-for-cancer-and-viral-infections
#10
H S Fernandes, C S Silva Teixeira, P A Fernandes, M J Ramos, N M F S A Cerqueira
INTRODUCTION: Amino acid depletion in the blood serum is currently being exploited and explored for therapies in tumors or viral infections that are auxotrophic for a certain amino acid or have a metabolic defect and cannot produce it. The success of these treatments is because normal cells remain unaltered since they are less demanding and/or can synthesize these compounds in sufficient amounts for their needs by other mechanisms. AREAS COVERED: This review is focused on amino acid depriving enzymes and their formulations that have been successfully used in the treatment of several types of cancer and viral infections...
November 4, 2016: Expert Opinion on Therapeutic Patents
https://www.readbyqxmd.com/read/27797224/glutaraldehyde-mediated-synthesis-of-asparaginase-bound-maghemite-nanocomposites-cytotoxicity-against-human-colon-adenocarcinoma-cells
#11
G Baskar, Garrick Bikku George
Drugs processed using nanobiotechnology may be more biocompatible, with sustainable and stabilised release or action. L-asparaginase produced from fungi has many advantages for treatment of lymphocytic leukemia with lesser side effect. In the present work, maghemite nanobiocomposites of fungal asparaginase were produced using glutaraldehyde-pretreated colloidal magnetic nanoparticles. Formation of nanobiocomposites was observed using laser light scattering and confirmed by UV-visible spectrophotometry with the absorption peak at 497 nm...
2016: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/27796436/enhanced-extracellular-production-of-l-asparaginase-from-bacillus-subtilis-168-by-b-subtilis-wb600-through-a-combined-strategy
#12
Yue Feng, Song Liu, Yun Jiao, Hui Gao, Miao Wang, Guocheng Du, Jian Chen
L-asparaginase (EC 3.5.1.1, ASN) exhibits great commercial value due to its uses in the food and medicine industry. In this study, we reported the enhanced expression of type II ASN from Bacillus subtilis 168 in B. subtilis WB600 through a combined strategy. First, eight signal peptides (the signal peptide of the ASN, ywbN, yvgO, amyE, oppA, vpr, lipA, and wapA) were used for ASN secretion in B. subtilis by using Hpa II promoter, respectively. The signal peptide wapA achieved the highest extracellular ASN activity (28...
October 28, 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27789644/genome-sequence-of-the-multiple-protease-producing-strain-geobacillus-thermoleovorans-n7-a-thermophilic-bacterium-isolated-from-paniphala-hot-spring-west-bengal-india
#13
Sucharita Bose, Trinetra Mukherjee, Urmimala Sen, Chayan Roy, Moidu Jameela Rameez, Wriddhiman Ghosh, Subhra Kanti Mukhopadhyay
Here, we present the draft genome sequence of Geobacillus thermoleovorans strain N7 (MCC 3175), isolated from Paniphala Hot Spring, West Bengal, India, which contains genes that encode several industrially and medically important thermostable enzymes like neutral protease, xylose isomerase, rhamnogalacturonan acetylesterase, nitrate and nitrite reductase, l-asparaginase, glutaminase, and RNase P.
October 27, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27770857/marine-microorganism-an-underexplored-source-of-l-asparaginase
#14
A A Prihanto, M Wakayama
l-Asparaginase (EC 3.5.1.1) is an enzyme that catalyzes the hydrolysis of l-asparagine to l-aspartic acid. This enzyme has an important role in medicine and food. l-Asparaginase is a potential drug in cancer therapy. Furthermore, it is also applied for reducing acrylamide, a carcinogenic compound in baked and fried foods. Until now, approved l-asparaginases for both applications are few due to their lack of appropriate properties. As a result, researchers have been enthusiastically seeking new sources of enzyme with better performance...
2016: Advances in Food and Nutrition Research
https://www.readbyqxmd.com/read/27767437/a-randomized-controlled-trial-of-the-effect-of-prednisone-omission-from-a-multidrug-chemotherapy-protocol-on-treatment-outcome-in-dogs-with-peripheral-nodal-lymphomas
#15
Michael O Childress, José A Ramos-Vara, Audrey Ruple
OBJECTIVE To determine the effect of prednisone omission from a multidrug chemotherapy protocol on outcome in dogs with peripheral nodal lymphomas. DESIGN Single-center, nonblinded, parallel-group, randomized, controlled trial. ANIMALS 40 client-owned dogs with a histopathologically confirmed diagnosis of peripheral nodal lymphoma and an expected survival time of > 4 weeks with treatment. PROCEDURES Treatment consisted of a combination of L-asparaginase, cyclophosphamide, doxorubicin, vincristine, and prednisone (L-CHOP) or an identical protocol except for the omission of prednisone (L-CHO)...
November 1, 2016: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/27764698/metabolic-alterations-caused-by-kras-mutations-in-colorectal-cancer-contribute-to-cell-adaptation-to-glutamine-depletion-by-upregulation-of-asparagine-synthetase
#16
Kosuke Toda, Kenji Kawada, Masayoshi Iwamoto, Susumu Inamoto, Takehiko Sasazuki, Senji Shirasawa, Suguru Hasegawa, Yoshiharu Sakai
A number of clinical trials have shown that KRAS mutations of colorectal cancer (CRC) can predict a lack of responses to anti-epidermal growth factor receptor-based therapy. Recently, there have been several studies to elucidate metabolism reprogramming in cancer. However, it remains to be investigated how mutated KRAS can coordinate the metabolic shift to sustain CRC tumor growth. In this study, we found that KRAS mutation in CRC caused alteration in amino acid metabolism. KRAS mutation causes a marked decrease in aspartate level and an increase in asparagine level in CRC...
October 17, 2016: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/27754445/l-asparaginase-isolated-from-phaseolus-vulgaris-seeds-exhibited-potent-anti-acute-lymphoblastic-leukemia-effects-in-vitro-and-low-immunogenic-properties-in-vivo
#17
Saleh A Mohamed, Mohamed F Elshal, Taha A Kumosani, Alia M Aldahlawi, Tasneem A Basbrain, Fauziah A Alshehri, Hani Choudhry
Escherichia coli-derived L-asparaginases have been used in the treatment of acute lymphoblastic leukemia (ALL), however, clinical hypersensitivity reactions and silent inactivation due to antibodies against E. coli-asparaginase, lead to inactivation of these preparations in most cases.Therefore, this study was aimed to investigate the cytotoxicity and antitumor effects ofa novel L-asparaginaseenzyme, isolated from Phaseolus vulgaris seeds (P-Asp) on the ALL cell line (Jurkat). The immunogenicity of the enzyme was also evaluated in-vivo and results were compared to commercially available enzymes of microbial sources...
October 14, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27752167/-retrospective-analyses-of-chope-plus-l-asparaginase-regimen-in-treatment-of-t-cell-lymphoma
#18
W L Wan, J Wang, M X Zhu, W Zhang, X Y Ke
OBJECTIVE: To investigate prognostic factors of the T-cell non-Hodgkin's lymphoma (T-NHL), and to study the clinical efficacy of CHOPE plus L-asparaginase(L-ASP) regimen for T-NHL. METHODS: Retrospective analyses were made of 61 T-NHL patients who were treated from July 2007 to August 2013. Randomly divided into two groups CHOPE and CHOPE+L group(Based on CHOPE, added with L-ASP on the 1st, 3rd, 5th, 7th, 9th and 11th day). RESULTS: Of the 61 patients evaluatd with the median survival was 22 (3-65) months,the complete remission rate was 52...
October 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/27748760/glutamine-activates-stat3-to-control-cancer-cell-proliferation-independently-of-glutamine-metabolism
#19
A Cacace, M Sboarina, T Vazeille, P Sonveaux
Cancer cells can use a variety of metabolic substrates to fulfill the bioenergetic and biosynthetic needs of their oncogenic program. Besides bioenergetics, cancer cell metabolism also directly influences genetic, epigenetic and signaling events associated with tumor progression. Many cancer cells are addicted to glutamine, and this addiction is observed in oxidative as well as in glycolytic cells. Although both oxidative and bioreductive glutamine metabolism can contribute to cancer progression and glutamine can further serve to generate peptides (including glutathione) and proteins, we report that glutamine promotes the proliferation of cancer cells independently of its use as a metabolic fuel or as a precursor of glutathione...
October 17, 2016: Oncogene
https://www.readbyqxmd.com/read/27743763/-fatal-central-nervous-system-hemorrhage-during-acute-lymphoblastic-leukemia-induction
#20
P Pardes-Chavanes, M Afanetti, C Boyer, M Poirée
Intracerebral hemorrhage (ICH) remains a cause of death in hematologic malignancies. Asparaginase represents a key agent in the treatment of acute lymphoblastic leukemia (ALL). The toxicity of asparaginase includes coagulopathy such as thrombotic or bleeding tendency. We report a case of fatal cerebral hemorrhage in a 12-year-old girl treated for ALL. Cerebral hemorrhage occurred after three injections of L-asparaginase. The patient presented with hypofibrinogenemia (0.36g/L), associated with thrombocytopenia (24,000/mm(3))...
October 12, 2016: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
keyword
keyword
41625
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"