Citrates
They play a vital role in the citric acid cycle, a key metabolic pathway involved in cellular energy production.
Citrates also have numerous industrial and commercial applications, such as in food preservation, pharmaceuticals, and cleaning products.
This MeSH term provides a comprehensive overview of the diverse functions and uses of citrates in scientific research and real-world applications.
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Most cited protocols related to «Citrates»
An intensity score of 0 to 3 was assigned for the intensity of tumour cells (0, none; 1, weak; 2, intermediate; 3, strong). A proportional score was given by the estimated proportion of positive tumour cells in percentage. To assess the average degree of staining within a tumour, multiple regions were analyzed, and at least 100 tumour cells were assessed. The cytoplasmic expression was assessed by H-score system [22 (link)]. The formula for the H-score is: Histoscore = ∑(I × Pi), where I = intensity of staining and Pi = percentage of stained tumour cells, producing a cytoplasmic score ranging from 0 to 300. The scoring was independently assessed by two assessors (AWHC and JHMT) who were not aware of the clinical outcomes.
groups: control group (CON2), model
group 5 (DM5), and model group 6 (DM6); control group was fed with regular
chow, and other two groups were given high-fat diet for 4 weeks; two model
groups were
injected IP with a low dose of STZ (STZ was injected twice, DM5: 25 mg/kg; DM6: 30 mg/kg). After one
week, FBG was measured, the rats with FBG < 7.8 mmol/L were injected with STZ again (DM5: 25 mg/kg;
DM6: 30 mg/kg), while the control rats were given vehicle citrate buffer (pH
4.4) in a dose volume of 0.25 mL/kg, IP, respectively. The body weight and food
intake were recorded every week. After 8 weeks of STZ injection, all the rats
were fasted for 12 hours, FBG was carried out. The successful rate was calculated. Intraperitoneal glucose tolerance test
(IPGTT) and insulin tolerance test (ITT) were carried out in control and
highest successful rate model group.
Most recents protocols related to «Citrates»
Example 8
The free cysteine on hu4D5Fabv8-(V110C) ThioFab was modified by the bis-maleimido reagent BM(PEO)3 (Pierce Chemical), leaving an unreacted maleimido group on the surface of the antibody. This was accomplished by dissolving BM(PEO)4 in a 50% ethanol/water mixture to a concentration of 10 mM and adding a tenfold molar excess of BM(PEO)3 to a solution containing hu4D5Fabv8-(V110C) ThioFab in phosphate buffered saline at a concentration of approximately 1.6 mg/ml (10 micromolar) and allowing it to react for 1 hour. Excess BM(PEO)3 was removed by gel filtration (HiTrap column, Pharmacia) in 30 mM citrate, pH 6 with 150 mM NaCl buffer. An approximate 10 fold molar excess DM1 dissolved in dimethyl acetamide (DMA) was added to the hu4D5Fabv8-(LC V110C) ThioFab-BMPEO intermediate. Dimethylformamide (DMF) may also be employed to dissolve the drug moiety reagent. The reaction mixture was allowed to react overnight before gel filtration or dialysis into PBS to remove unreacted drug. Gel filtration on 5200 columns in PBS was used to remove high molecular weight aggregates and furnish purified hu4D5Fabv8-(LC V110C) ThioFab-BMPEO-DM1.
By the same protocol, hu4D5Fabv8 (HC A121C) ThioFab-BMPEO-DM1 was prepared.
Example 1
Whole blood were collected from volunteer donors must be performed by personal trained in phlebotomy/venipuncture using a double blood bag system (about 50 ml) (TerumoBCT, Japan) with anticoagulant (1 ml of Anticoagulant Citrate Dextrose (ACD) Solution Formula/per 10 ml of blood). After blood collection, gently mix the blood by inverting the tube several times to ensure thorough mixing with anticoagulant. For thorough mixing of blood collected into citrate tubes, it is recommended to invert the tube 3-4 times, while ACD tubes should be inverted eight times. Blood samples should be maintained at temperate conditions (20-24° C.) and centrifuged within 4 hours of blood collection. To separate the plasma, centrifuge the blood samples at 1200×g for 10 minutes at 22° C. If needed, RCF for a centrifuge can be calculated. After centrifugation, the plasma layer will be the upper layer of the separated blood and appear a clear, straw-yellow colored fluid.
Example 4
The midpoint of transition for the thermal unfolding of the tested constructs was determined by Differential Scanning Fluorimetry (DSF), essentially as described by Niesen (Niesen et al., Nat Protoc. 2 (2007) 2212-21). The DSF assay is performed in a qPCR machine (e.g. MX3005p, Agilent Technologies). The samples were diluted in buffer (citrate-phosphate pH 6.4, 0.25 M NaCl) containing a final concentration of 5×SYPRO orange in a total volume of 25 μL. Samples were measured in triplicates and a temperature ramp from 25-96° C. programmed. The fluorescence signal was acquired and the raw data was analyzed with the GraphPad Prism (GraphPad Software Inc.).
Example 14
To measure in vitro expression of human OTC in HeLa cells, those cells were seeded on 12-well plates (BD Biosciences, San Jose, USA) one day prior to transfection. mRNA formulations comprising human OTC or a GFP control was transfected using 800 ng mRNA and 2 μL Lipofectamin 2000 in 60 μL OPTI-MEM per well and incubated.
After 24 hours, the cells in each well were lysed using a consistent amount of lysis buffer. Appropriate controls were used, including citrate synthesase, a mitochondrial marker. Protein concentrations of each were determined using a BCA assay according to manufacturer's instructions. To analyze OTC expression, equal loads of each lysate (24 μg) were prepared in a loading buffer and subjected to standard Western blot analysis. For detection of OTC, a commercial anti-OTC antibody was used according to the manufacturer's instructions. The mRNA expressed OTC was compared to loaded recombinant human OTC protein (10, 5, and 2.5 ng).
For the TEM experiments, two fresh skin samples (1cm×1cm) per color morph from the Asian vine snake were collected. The samples were then cut into small pieces (1 mm3) in fixative. The tissue blocks were transferred to an Eppendorf tube with fresh TEM fixative for further fixation, then washed using 0.1 M PB (pH 7.4) three times (15 min each). The samples were dehydrated in an increasing ethanol series at room temperature, followed by two changes of acetone and transfer to resin for embedding. The resin blocks were cut to 60–80-nm slices on an ultra-microtome (Leica, UC7), and the ultra-thin sections were put onto the 150-mesh cuprum grids. The cuprum grids were then stained with 2% uranium acetate-saturated alcohol solution and 2.6% lead citrate, respectively. Finally, the cuprum grids were observed under a TEM (Hitachi, HT7800/HT7700) and imaged.
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More about "Citrates"
These versatile molecules have a diverse range of applications, from food preservation and pharmaceuticals to cleaning products.
Synonyms for citrates include tricarballylate, tricarballylic acid, and citric acid salts.
Related terms include the citric acid cycle (also known as the Krebs cycle or tricarboxylic acid cycle), tricarboxylic acids, and tricarboxylic acid anions.
The abbreviation for citrates is often 'cit.' Subtopics within the realm of citrates include their involvement in cellular respiration and ATP synthesis, their use as pH buffers and chelating agents, and their applications in the food industry (e.g., as preservatives, flavoring agents, and emulsifiers) and the pharmaceutical industry (e.g., as drug formulation excipients).
To expand on the related terms, STZ (streptozotocin) is a compound used to induce diabetes in animal models, while H-7650 is a specific citrate-based buffer solution.
EM UC7 and HT7700 are ultramicrotomes used for sample preparation in electron microscopy, and the EM UC6 ultramicrotome is another instrument in this category.
JEM-1400 is a transmission electron microscope, and glutaraldehyde is a common fixative used in electron microscopy.
Bovine serum albumin is a protein often used in biological experiments.
By understanding the diverse functions and applications of citrates, researchers can optimize their citrate-related studies and unlock new discoveries.
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OtherTerms: tricarballylate, tricarballylic acid, citric acid salts, citric acid cycle, Krebs cycle, tricarboxylic acid cycle, tricarboxylic acids, tricarboxylic acid anions, cit, cellular respiration, ATP synthesis, pH buffers, chelating agents, food preservation, pharmaceuticals, electron microscopy, streptozotocin, H-7650, EM UC7, HT7700, EM UC6, JEM-1400, glutaraldehyde, bovine serum albumin