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Guangshuo Zhu et al.
Hypertension (Dallas, Tex. : 1979), 65(2), 385-392 (2014-12-03)
Nitroxyl (HNO), the reduced and protonated form of nitric oxide (NO·), confers unique physiological effects including vasorelaxation and enhanced cardiac contractility. These features have spawned current pharmaceutical development of HNO donors as heart failure therapeutics. HNO interacts with selective redox...
Lu Luo et al.
Biomedical materials (Bristol, England), 10(5), 055011-055011 (2015-09-24)
Bioreactors that subject cell seeded scaffolds or hydrogels to biophysical stimulation have been used to improve the functionality of tissue engineered cartilage and to explore how such constructs might respond to the application of joint specific mechanical loading. Whether a...
Zhao-Yun Cao et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 976-977, 19-26 (2014-12-02)
Analysis of biothiols is still problematic, due to their high polarity, oxidation sensitivity and time-consuming sample preparation. In this paper, a direct, rapid and sensitive method was developed for simultaneous quantification of unbound cysteine (Cys), glutathione (GSH) and phytochelatins (PCs)...
Yipin Wu et al.
American journal of physiology. Regulatory, integrative and comparative physiology, 309(7), R747-R756 (2015-08-01)
Inwardly rectifying potassium channels play essential roles in renal physiology across phyla. Barium-sensitive K(+) conductances are found on the basolateral membrane of a variety of insect Malpighian (renal) tubules, including Drosophila melanogaster. We found that barium decreases the lumen-positive transepithelial...
Voin Petrović et al.
Journal of inorganic biochemistry, 140, 228-235 (2014-09-01)
Na(+)/K(+)-ATPase is in charge of maintaining the ionic and osmotic intracellular balance by using ATP as an energy source to drive excess Na(+) ions out of the cell in exchange for K(+) ions. We explored whether three representative cytotoxic gold(III)...
S Martín et al.
International journal for parasitology, 45(13), 831-840 (2015-08-05)
The limitations associated with the use of anthelmintic drugs in the control of gastrotintestinal nematodosis, such as the emergence of anthelmintic resistance, have stimulated the study of the immunological control of many parasites. In the case of Haemonchus contortus, several...
Yoshio Takeuchi et al.
Bioorganic & medicinal chemistry letters, 18(23), 6202-6205 (2008-10-28)
In order to investigate crystallographically the mechanism of inhibition of cysteine protease by alpha-methyl-gamma,gamma-diphenylallenecarboxylic acid ethyl ester 3, a cysteine protease inhibitor having in vivo stability, we synthesized N-(alpha-methyl-gamma,gamma-diphenylallenecarbonyl)-L-phenylalanine ethyl ester 4. Reaction of 4 with thiophenol, the SH group...
Masaru Wada et al.
Applied microbiology and biotechnology, 73(1), 48-54 (2006-10-06)
L-Cysteine is an important amino acid both biologically and commercially. Although most amino acids are commercially produced by fermentation, cysteine is mainly produced by protein hydrolysis. However, synthetic or biotechnological products have been preferred in the market. Biotechnological processes for...
N M Kredich et al.
Ciba Foundation symposium, (72)(72), 87-99 (1979-01-01)
In Salmonella typhimurium and Escherichia coli the biosynthesis of L-cysteine from L-serine and inorganic sulphate proceeds along a branched convergent pathway along one arm of which sulphate is reduced to sulphide, while on the other L-serine is acetylated to O-acetyl-L-serine....
Tobias Piroth et al.
Cell transplantation, 23(8), 995-1007 (2013-05-03)
Restorative cell therapy concepts in neurodegenerative diseases are aimed at replacing lost neurons. Despite advances in research on pluripotent stem cells, fetal tissue from routine elective abortions is still regarded as the only safe cell source. Progenitor cells isolated from...
Roomina Jahroomishirazi et al.
Cells, tissues, organs, 200(2), 141-152 (2015-05-23)
Mesenchymal stem cells (MSCs) have great promise in the field of regenerative medicine due to their differentiation potential into several lineages. Besides the bone marrow, MSCs can be obtained from the dermis, which represents a large stem cell reservoir in...
Valerio Leoni et al.
Clinical chemistry and laboratory medicine, 42(2), 186-191 (2004-04-06)
24S-Hydroxycholesterol (24OHC) and 27-hydroxycholesterol (27OHC) are two structurally similar oxysterols of different origins--the former almost exclusively formed in the brain and the latter formed to a lesser extent in the brain than in most other organs. HYPOTHESIS TO BE TESTED:...
Joanna Czarnecka et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 822(1-2), 85-90 (2005-07-05)
New method of qualitative and quantitative analysis of nucleotides in human cerebrospinal fluid (CSF), based on the combination of extraction of purines and pyrimidines to the solid phase (SPE) and high-performance liquid chromatography (HPLC), was proposed. Use of SPE and...
Kolsoom Parvaneh et al.
BioMed research international, 2015, 897639-897639 (2015-09-15)
Probiotics are live microorganisms that exert beneficial effects on the host, when administered in adequate amounts. Mostly, probiotics affect the gastrointestinal (GI) tract of the host and alter the composition of gut microbiota. Nowadays, the incidence of hip fractures due...
R Janáky et al.
Neurochemical research, 25(9-10), 1397-1405 (2000-11-04)
We review here the possible mechanisms of neuronal degeneration caused by L-cysteine, an odd excitotoxin. L-Cysteine lacks the omega carboxyl group required for excitotoxic actions via excitatory amino acid receptors, yet it evokes N-methyl-D-aspartate (NMDA) -like excitotoxic neuronal death and...
Melissa A Badding et al.
PloS one, 9(6), e101310-e101310 (2014-07-01)
Welding processes that generate fumes containing toxic metals, such as hexavalent chromium (Cr(VI)), manganese (Mn), and nickel (Ni), have been implicated in lung injury, inflammation, and lung tumor promotion in animal models. While federal regulations have reduced permissible worker exposure...
Pedro L Martinez-Espinosa et al.
eLife, 4 (2015-11-13)
Two mammalian genes, Kcnt1 and Kcnt2, encode pore-forming subunits of Na(+)-dependent K(+) (KNa) channels. Progress in understanding KNa channels has been hampered by the absence of specific tools and methods for rigorous KNa identification in native cells. Here, we report...
L Zhang et al.
Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society, 27(9), 1274-1281 (2015-06-20)
The aim of the present study was to investigate whether the synthesis of endogenous hydrogen sulfide (H2 S) was altered in achalasia patients and to determine the effects of H2 S on esophageal motility. (1) Tissue samples in lower esophageal...
Marta Siernicka et al.
Immunology, 146(1), 173-183 (2015-06-23)
Natural killer (NK) cells are considered critical components of the innate and adaptive immune responses. Deficiencies in NK cell activity are common, such as those that occur in cancer patients, and they can be responsible for dysfunctional immune surveillance. Persistent...
Larissa Staurengo-Ferrari et al.
Pharmacological reports : PR, 66(4), 691-698 (2014-06-21)
Several lines of evidence have indicated that nitric oxide (NO) plays complex and diverse roles in modulation of pain/analgesia. However, the roles of charged and uncharged congeners of NO are less well understood. In the present study, the antinociceptive effect...
Emmanuelle Boll et al.
Organic letters, 17(1), 130-133 (2014-12-17)
The use of the N-acetoacetyl protecting group for N-terminal cysteine residue enabled creation of an efficient and mild one-pot native chemical ligation/SEA ligation sequence giving access to large cyclic peptides.
Jennifer Bridwell-Rabb et al.
Biochemistry, 53(30), 4904-4913 (2014-06-28)
Iron-sulfur clusters are ubiquitous protein cofactors with critical cellular functions. The mitochondrial Fe-S assembly complex, which consists of the cysteine desulfurase NFS1 and its accessory protein (ISD11), the Fe-S assembly protein (ISCU2), and frataxin (FXN), converts substrates l-cysteine, ferrous iron...
Yoshiaki Nishiya et al.
Bioscience, biotechnology, and biochemistry, 69(11), 2244-2246 (2005-11-25)
We have developed a new enzymatic assay for determining L-cysteine concentration. The method involves the use of betaC-S lyase from Streptococcus anginosus, which catalyzes the alpha,beta-elimination of L-cysteine to hydrogen sulfide, pyruvate, and ammonia. The production of pyruvate is measured...
Nour Mammari et al.
PloS one, 9(6), e98491-e98491 (2014-06-03)
The severity of toxoplasmic infection depends mainly on the immune status of the host, but also on the Toxoplasma gondii strains, which differ by their virulence profile. The relationship between the human host and T. gondii has not yet been...
Daniel L Turman et al.
Proceedings of the National Academy of Sciences of the United States of America, 112(18), 5697-5701 (2015-04-23)
The Fluc family is a set of small membrane proteins forming F(-)-specific electrodiffusive ion channels that rescue microorganisms from F(-) toxicity during exposure to weakly acidic environments. The functional channel is built as a dual-topology homodimer with twofold symmetry parallel...
Mahesh Kumar Verma et al.
SpringerPlus, 3, 251-251 (2014-06-18)
Apart from elevated glucose, triglyceride and cholesterol, elevated levels of serum free-fatty acid (FFA) are observed in diabetic patients. Increased FFA load can cause multiple dysregulation which are collectively known as lipotoxicity. Impacts of FFA induced lipotoxicity were evaluated on...
John M Pryor et al.
Proceedings of the National Academy of Sciences of the United States of America, 112(33), E4537-E4545 (2015-08-05)
Nonhomologous end joining (NHEJ) repairs chromosome breaks and must remain effective in the face of extensive diversity in broken end structures. We show here that this flexibility is often reliant on the ability to direct DNA synthesis across strand breaks...
Oluwasesan Adegoke et al.
Talanta, 146, 780-788 (2015-12-24)
Environmental pollutants, such as the polycyclic aromatic hydrocarbons (PAHs), become widely distributed in the environment after emission from a range of sources, and they have potential biological effects, including toxicity and carcinogenity. In this work, we have demonstrated the analytical...
Joshua K Crowell et al.
Biochemistry, 53(48), 7541-7548 (2014-11-12)
Cysteine dioxygenase (CDO) is a non-heme mononuclear iron enzyme that catalyzes the O2-dependent oxidation of l-cysteine (Cys) to produce cysteine sulfinic acid (CSA). This enzyme catalyzes the first committed step in Cys catabolism; thus, it is central to mammalian sulfur...
Thomas F Palmberger et al.
International journal of pharmaceutics, 491(1-2), 318-322 (2015-06-23)
Recently, the cationic polymer thiolated chitosan has been reported to modulate drug absorption by inhibition of intestinal efflux pumps. The objective of this study was to evaluate in vitro and in vivo whether thiolated anionic biopolymers also show an efflux...
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