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Lactic acid ldh

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https://www.readbyqxmd.com/read/29306548/disrupting-the-warburg-effect-re-routes-cancer-cells-to-oxphos-offering-a-vulnerability-point-via-ferroptosis-induced-cell-death
#1
REVIEW
Maša Ždralević, Milica Vučetić, Boutaina Daher, Ibtissam Marchiq, Scott K Parks, Jacques Pouysségur
The evolution of life from extreme hypoxic environments to an oxygen-rich atmosphere has progressively selected for successful metabolic, enzymatic and bioenergetic networks through which a myriad of organisms survive the most extreme environmental conditions. From the two lethal environments anoxia/high O2, cells have developed survival strategies through expression of the transcriptional factors ATF4, HIF1 and NRF2. Cancer cells largely exploit these factors to thrive and resist therapies. In this review, we report and discuss the potential therapeutic benefit of disrupting the major Myc/Hypoxia-induced metabolic pathway, also known as fermentative glycolysis or "Warburg effect", in aggressive cancer cell lines...
December 28, 2017: Advances in Biological Regulation
https://www.readbyqxmd.com/read/29298541/chitosan-poly-lactic-acid-coated-piceatannol-nanoparticles-exert-an-in-vitro-apoptosis-activity-on-liver-lung-and-breast-cancer-cell-lines
#2
Jeevitha Dhanapal, Malathy Balaraman Ravindrran
The aim of the study was to synthesize nanoparticles (NPs) with chitosan (CS), and poly (lactic acid) (PLA) as a carrier for the drug piceatannol (PIC). The synthesized nanoparticles form the composite of polymeric-drug nanoparticles (CS/PLA-PIC NPs) by dropping method. The preliminary and stability studies were determined for the polymers drug-loading capacity and encapsulation efficiencies. The in vitro drug release study showed that NPs provided a continuous release of the entrapped PIC. The NPs found to be a good scavenger for DPPH, SOD and NO radicals...
January 3, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29288635/foxd3-inhibits-scn2a-gene-transcription-in-intractable-epilepsy-cell-models
#3
Jun Xiang, Fang Wen, Lingyun Zhang, Yu Zhou
The expression of sodium voltage-gated channel alpha subunit 2 (SCN2A) is closely related to the development of epilepsy. This study investigated regulatory element of the SCN2A gene involved in epilepsy. An intractable epilepsy cell model was constructed using hippocampal primary neurons and the SH-SY5Y cell line. SCN2A protein and gene expression in cells as well as the level of lactic acid dehydrogenase (LDH) in the cell culture supernatants was detected. Potential regulatory factors of SCN2A and its upstream regulatory elements were identified using the dual-luciferase reporter assay...
December 27, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29223591/mild-hypothermia-protects-hippocampal-neurons-from-oxygen-glucose-deprivation-injury-through-inhibiting-caspase-3-activation
#4
Tianen Zhou, Hui Lin, Longyuan Jiang, Tao Yu, Chaotao Zeng, Juanhua Liu, Zhengfei Yang
Mild hypothermia (MH) is thought to be one of the most effective therapeutic methods to treat hypoxic-ischemic encephalopathy (HIE) after cardiac arrest (CA). However, its precise mechanisms remain unclear. In this research, hippocampal neurons were cultured and treated with mild hypothermia and Ac-DEVD-CHO after oxygen-glucose deprivation (OGD). The activity of caspase-3 was detected, in order to find the precise concentration of Ac-DEVD-CHO with the same protective role in OGD injury as MH treatment. Western blot and immunofluorescence staining were conducted to analyze the effects of MH and Ac-DEVD-CHO on the expressions of caspase-3, caspase-8, and PARP...
December 6, 2017: Cryobiology
https://www.readbyqxmd.com/read/29208409/direct-fermentation-of-jerusalem-artichoke-tuber-powder-for-production-of-l-lactic-acid-and-d-lactic-acid-by-metabolically-engineered-kluyveromyces-marxianus
#5
Jung-Hoon Bae, Hyun-Jin Kim, Mi-Jin Kim, Bong Hyun Sung, Jae-Heung Jeon, Hyun-Soon Kim, Yong-Su Jin, Dae-Hyuk Kweon, Jung-Hoon Sohn
An efficient production system for optically pure l- and d-lactic acid (LA) from Jerusalem artichoke tuber powder (JAP) was developed by metabolic engineering of Kluyveromyces marxianus. To construct LA-producing strains, the ethanol fermentation pathway of K. marxianus was redirected to LA production by disruption of KmPDC1 and expression of l- and d-lactate dehydrogenase (LDH) genes derived from Lactobacillus plantarum under the control of the K. marxianus translation elongation factor 1α promoter. To further increase the LA titer, the l-LA and d-LA consumption pathway of host strains was blocked by deletion of the oxidative LDH genes KmCYB2 and KmDLD1...
December 2, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/29196919/the-combined-efficiency-of-dietary-isomaltooligosaccharides-and-bacillus-spp-on-the-growth-hemato-serological-and-intestinal-microbiota-indices-of-caspian-brown-trout-salmo-trutta-caspius-kessler-1877
#6
Maryam Aftabgard, Alireza Salarzadeh, Mahmoud Mohseni, Amir Houshang Bahri Shabanipour, Mohammad Ebrahim Jalil Zorriehzahra
The combined effects of a commercial probiotic, BetaPlus®, and a prebiotic, isomaltooligosaccharides (IMOS) on the growth, survival rate, intestinal microbiota, and hemato-immunological parameters were evaluated in Caspian brown trout (Salmo trutta caspius Kessler, 1877). Caspian brown trout fingerlings (~ 9 g) were fed a control diet (basal diet) or a synbiotic diet (the basal diet + 2 g kg-1 IMOS + 1 g kg-1 BetaPlus®) for 7 weeks. At the end of this trial, fish fed the synbiotic diet showed significant improvements in body weight increase, feed conversion ratio, and survival rate compared with fish fed the control diet (P < 0...
December 1, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/29188185/metabolic-engineering-of-schizosaccharomyces-pombe-via-crispr-cas9-genome-editing-for-lactic-acid-production-from-glucose-and-cellobiose
#7
Aiko Ozaki, Rie Konishi, Chisako Otomo, Mayumi Kishida, Seiya Takayama, Takuya Matsumoto, Tsutomu Tanaka, Akihiko Kondo
Modification of the Schizosaccharomyces pombe genome is often laborious, time consuming due to the lower efficiency of homologous recombination. Here, we constructed metabolically engineered S. pombe strains using a CRISPR-Cas9 system and also demonstrated D-lactic acid (D-LA) production from glucose and cellobiose. Genes encoding two separate pyruvate decarboxylases (PDCs), an L-lactic acid dehydrogenase (L-LDH), and a minor alcohol dehydrogenase (SPBC337.11) were disrupted, thereby attenuating ethanol production...
December 2017: Metabolic Engineering Communications
https://www.readbyqxmd.com/read/29178877/non-sterilized-fermentation-of-high-optically-pure-d-lactic-acid-by-a-genetically-modified-thermophilic-bacillus-coagulans-strain
#8
Caili Zhang, Cheng Zhou, Nilnate Assavasirijinda, Bo Yu, Limin Wang, Yanhe Ma
BACKGROUND: Optically pure D-lactic acid (≥ 99%) is an important precursor of polylactic acid. However, there are relatively few studies on D-lactic acid fermentation compared with the extensive investigation of L-lactic acid production. Most lactic acid producers are mesophilic organisms. Optically pure D-lactic acid produced at high temperature not only could reduce the costs of sterilization but also could inhibit the growth of other bacteria, such as L-lactic acid producers. RESULTS: Thermophilic Bacillus coagulans is an excellent producer of L-lactic acid with capable of growing at 50 °C...
November 25, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/29142539/values-of-magnetic-resonance-imaging-and-cerebrospinal-fluid-analysis-in-the-diagnosis-of-central-nervous-system-associated-infectious-diseases
#9
Dongfeng Zhang
Objective: To discuss the roles of magnetic resonance imaging (MRI) and cerebrospinal fluid analysis in the identification of central nervous system associated infection and provide a reference for the diagnosis and treatment of central nervous system associated infectious diseases. Methods: Seventy-six patients who developed central nervous system infection and were admitted into the Henan People's Hospital between June 2014 and October 2015 were randomly selected as an observation group...
September 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29122406/sensitive-skin-is-highly-frequent-in-extrinsic-atopic-dermatitis-and-correlates-with-disease-severity-markers-but-not-necessarily-with-skin-barrier-impairment
#10
Tsuyoshi Yatagai, Takatoshi Shimauchi, Hayato Yamaguchi, Jun-Ichi Sakabe, Masahiro Aoshima, Shigeki Ikeya, Kazuki Tatsuno, Toshiharu Fujiyama, Taisuke Ito, Toshiyuki Ojima, Yoshiki Tokura
BACKGROUND: Sensitive skin is a condition of cutaneous hypersensitivity to environmental factors. Lactic acid stinging test (LAST) is commonly used to assess sensitive skin and composed of four distinct sensations (pain, burning sensation, itch, and crawly feeling). A link between sensitive skin and barrier dysfunction has been proposed in atopic dermatitis (AD) patients. However, clinical and laboratory factors that are associated with sensitive skin remain unelucidated. OBJECTIVE: To investigate relationship between sensitive skin and AD-associated markers...
November 2, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29118438/substrate-specificity-and-allosteric-regulation-of-a-d-lactate-dehydrogenase-from-a-unicellular-cyanobacterium-are-altered-by-an-amino-acid-substitution
#11
Shoki Ito, Masahiro Takeya, Takashi Osanai
Lactate/lactic acid is an important chemical compound for the manufacturing of bioplastics. The unicellular cyanobacterium Synechocystis sp. PCC 6803 can produce lactate from carbon dioxide and possesses D-lactate dehydrogenase (Ddh). Here, we performed a biochemical analysis of the Ddh from this cyanobacterium (SyDdh) using recombinant proteins. SyDdh was classified into a cyanobacterial clade similar to those from Gram-negative bacteria, although it was distinct from them. SyDdh can use both pyruvate and oxaloacetate as a substrate and is activated by fructose-1,6-bisphosphate and repressed by divalent cations...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29108621/in-vitro-biosynthesis-of-3-mercaptolactate-by-lactate-dehydrogenases
#12
Christina Andreeßen, Natalie Wolf, Benedikt Cramer, Hans-Ulrich Humpf, Alexander Steinbüchel
3-Mercaptolactate (3ML) is an interesting mercapto compound with special regard to the biosynthesis of new polythioesters (PTEs). Unfortunately, this thioester analog of lactic acid is currently not commercially available. For this reason, we developed an in vitro biosynthesis pathway to convert cysteine to 3-mercaptopyruvate (3MPy), which is then rapidly and efficiently converted to 3ML by suitable lactate dehydrogenases (LDHs). As liver LDH from Rattus norvegicus (LDHRn) was previously described to Exhibit 3MPy reduction activity, in silico studies based on homology to LDHRn were performed and led to the identification of four potentially suitable bacterial LDH candidates from Escherichia coli (LDHEc), Corynebacterium glutamicum (LDHCg), Bacillus cereus (LDHBc) and Gloeobacter violaceus (LDHGv)...
January 2018: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/29102604/fluorometric-determination-of-d-lactate-in-biological-fluids
#13
Torben Larsen
OBJECTIVE: D-lactic acid in the mammalian body is mainly of microbiological origin and is often located somewhere along the digestive tract. Surgical, extensive re-sectioning of the small bowel may be one of the risk factors for altered balance in the microbiological environment. Higher levels in the body may lead to D-lactate acidosis and neurotoxicity; consequently, the possibility of diagnosis of this condition is important. Several analytical procedures for D-lactate have been introduced, but it is absolutely mandatory to distinguish this metabolite from the much more abundant and naturally occurring stereoisomer L-lactate...
November 3, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/29096743/cardioprotective-effect-of-pycnogenol-in-ischemic-reperfusion-injury-iri-in-rats
#14
P Xiao, K Zhang, Z Tao, N Liu, B Ge
Oxidative stress plays a critical task in the biochemical and pathological alteration linked with myocardial ischemic-reperfusion injury (IRI). This warrants identifying agents with a potential for preventing such damage in an effective way. A novel plant based product, Pycnogenol, obtained from the French maritime pine (Pinus pinaster ssp. atlantica) bark extract was known for its tremendous antioxidant potential (both in vivo, in vitro). It was able to attenuate the symptoms of immune dysfunction through restoring a cellular antioxidant status in low micronutrient-induced immune deficient mice...
October 26, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/29039545/grape-seed-proanthocyanidins-protect-cardiomyocytes-against-hypoxia-reoxygenation-injury-by-attenuating-endoplasmic-reticulum-stress-through-perk-eif2%C3%AE-pathway
#15
Xin Wang, Dalin Jia, Juncheng Zhang, Wei Wang
The aim of the present study was to observe the protective effect of grape seed proanthocyanidins (GSPs) against endoplasmic reticulum (ER) stress‑mediated apoptosis caused by hypoxia/reoxygenation (H/R) injury in H9C2 cardiomyocytes along with its potential mechanisms. H9C2 cardiomyocytes underwent hypoxia for 3 h followed by reoxygenation for 3 h. Different doses of GSPs (50, 100 and 200 µg/ml) were administered 30 min before hypoxia. Cell viability was assessed, as well as lactic dehydrogenase (LDH) activity, cell apoptosis rate, expression levels of glucose‑regulated protein 78 (GRP78), C/EBP‑homologous protein (CHOP), protein kinase RNA‑like ER kinase (PERK), and eukaryotic translation initiation factor‑2 (eIF2α) mRNA and protein...
December 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29038973/production-of-ethylene-glycol-or-glycolic-acid-from-d-xylose-in-saccharomyces-cerevisiae
#16
Laura Salusjärvi, Mervi Toivari, Maija-Leena Vehkomäki, Outi Koivistoinen, Dominik Mojzita, Klaus Niemelä, Merja Penttilä, Laura Ruohonen
The important platform chemicals ethylene glycol and glycolic acid were produced via the oxidative D-xylose pathway in the yeast Saccharomyces cerevisiae. The expression of genes encoding D-xylose dehydrogenase (XylB) and D-xylonate dehydratase (XylD) from Caulobacter crescentus and YagE or YjhH aldolase and aldehyde dehydrogenase AldA from Escherichia coli enabled glycolic acid production from D-xylose up to 150 mg/L. In strains expressing only xylB and xylD, 29 mg/L 2-keto-3-deoxyxylonic acid [(S)-4,5-dihydroxy-2-oxopentanoic acid] (2K3DXA) was produced and D-xylonic acid accumulated to ca...
October 16, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28986980/metabolic-engineering-of-bacillus-subtilis-for-production-of-d-lactic-acid
#17
Deepika Awasthi, Liang Wang, Mun S Rhee, Qingzhao Wang, Diane Chauliac, Lonnie O Ingram, Keelnatham T Shanmugam
Poly lactic acid (PLA) based plastics is renewable, bio-based, and biodegradable. Although present day PLA is composed of mainly L-LA, an L- and D- LA copolymer is expected to improve the quality of PLA and expand its use. To increase the number of thermotolerant microbial biocatalysts that produce D-LA, a derivative of Bacillus subtilis strain 168 that grows at 50°C was metabolically engineered. Since B. subtilis lacks a gene encoding D-lactate dehydrogenase (ldhA), five heterologous ldhA genes (B. coagulans ldhA and gldA101, and ldhA from three Lactobacillus delbrueckii) were evaluated...
October 7, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28983299/deletion-of-the-l-lactate-dehydrogenase-gene-ldh-in-streptococcus-pyogenes-leads-to-a-loss-of-speb-activity-and-a-hypovirulent-phenotype
#18
Sonja Oehmcke-Hecht, Leif E Nass, Jan B Wichura, Stefan Mikkat, Bernd Kreikemeyer, Tomas Fiedler
Streptococcus pyogenes uses lactic acid fermentation for the generation of ATP. Here, we analyzed the impact of a deletion of the L-lactate dehydrogenase gene ldh on the virulence of S. pyogenes M49. While the ldh deletion does not cause a general growth deficiency in laboratory media, the growth in human blood and plasma is significantly hampered. The ldh deletion strain is furthermore less virulent in a Galleria mellonella infection model. We show that the ldh deletion leads to a decrease in the activity of the cysteine protease SpeB, an important secreted virulence factor of S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28959005/machine-perfusion-at-20%C3%A2-c-prevents-ischemic-injury-and-reduces-hypoxia-inducible-factor-1%C3%AE-expression-during-rat-liver-preservation
#19
Clarissa Berardo, Laura Giuseppina Di Pasqua, Veronica Siciliano, Vittoria Rizzo, Plinio Richelmi, Andrea Ferrigno, Mariapia Vairetti
BACKGROUND Ischemic cholangitis is the main cause of liver failure after transplantation and subnormothermic machine perfusion may represent a better strategy than conventional cold storage, minimizing preservation injury. We compared livers preserved by machine perfusion at 20°C (MP20) or by cold storage at 4°C (CS4) with regard to hypoxia-inducible factor (HIF)-1α mRNA expression and protein stabilization in hypoxic conditions. MATERIAL AND METHODS Livers from male Wistar rats were stored on ice at 4°C in UW solution (CS4) or perfused with oxygenated Krebs-Henseleit buffer at 20°C (MP20) for six hours...
September 29, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28923649/hypothermic-machine-perfusion-s-protection-on-porcine-kidney-graft-uncovers-greater-akt-erk-phosphorylation
#20
N He, J-H Li, J-J Jia, K-D Xu, Y-F Zhou, L Jiang, H-H Lu, S-Y Yin, H-Y Xie, L Zhou, S-S Zheng
BACKGROUND: To investigate the potential mechanisms of hypothermic machine perfusion (HMP)'s beneficial effects on kidney graft over static cold storage (SCS) in vitro. METHODS: Ten kidneys of 5 Bama miniature male pigs were paired into 2 groups: SCS group and HMP group. Preservation solutions were taken at 0, 1, 3, and 6 hours for the measurement of K(+), Na(+), Cl(-), blood urea nitrogen (BUN), creatinine (Cr), and lactate dehydrogenase (LDH) using the standard laboratory methods...
October 2017: Transplantation Proceedings
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