Glicociência

The structure of GD2-oligosaccharide-sp-biotin (sodium salt) comprises (GalNAcβ1,4Galβ1,4Glc) with two sialic acids linked (β-2,3/β-2,8) to the central galactose residue and biotin attached to position 1 of the reducing glucose moiety. GD2 ganglioside is expressed at a low concentration in the central nervous system, nerves, skin melanocytes and stem cells in healthy adults. On the other hand, GD2 ganglioside is overexpressed in a number of tumors, including: neuroblastoma, melanoma, small cell lung carcinoma and brain tumors. Recently, it has been found in low concentrations on breast cancer stem cells (CSC) that possess: self-renewal properties (division without disrupting the undifferentiated state) and tumor-initiating capabilities. It has been suggested that GD2 ganglioside may be developed as an effective target antigen for CSC immunotherapy.

Laminaran is a polysaccharide that co-occurs with fucoidan and alginate in brown seaweeds such as Laminaria digitata, Laminaria cloustoni, Eisenia bicyclis and Thallus laminariae. It is a β-1,3-linked glucan which it is claimed stimulates the immune system in mammals and fish.
The image was kindly provided by Prof Mike Guiry from Cork who runs ‘The Seaweed Site’.

Sodium Trigalacturonate (α-1,4 sodium galacturonotriose) is derived from pectin or pectic acid, by enzymatic or partial acid hydrolysis (Combo, 2012). It is used in galacturonic acid metabolism research as a substrate to identify, differentiate, and characterize endo- and exopolygalacturonase(s), and gluconase(s) (Jayani, 2005). The addition of very short fragments of homogalacturonan, tri-galacturonate, and tetra-galacturonate oligosaccharides, restore development in dark-grown, de-etiolated seedling mutants, suggesting that they are unable to generate de-methylesterified pectin fragments. A model of spatiotemporally separated photoreceptive and signal-responsive cell types has been proposed, that contains overlapping subsets of the regulatory network of light-dependent seedling development (Sinclair, 2017).

O-(D-glucopyranosylidene)amino N-phenylcarbamate is a synthetic monosaccharide that is used in our laboratory as an intermediate for the synthesis of complex carbohydrates. It is also used in the modification of polysaccharides and glycosylations. This compound has been shown to be stable to hydrolysis, methylation, and oxidation. O-(D-glucopyranosylidene)amino N-phenylcarbamate has been shown to be a high purity product with a CAS number of 104012-84-2.

Dextran 2000 is a high molecular weight biocompatible polymer with transport properties. It is used in a variety of medical applications, such as red blood cell transfusions and the prevention of post-surgical adhesions. Dextran 2000 has been shown to be a safe and effective means of preventing hemolysis during red blood cell transfusion. This agent binds to amine groups on the surface of erythrocytes, which prevents complement activation and subsequent lysis. Additionally, dextran 2000 has been shown to exhibit low cytotoxicity against neuronal cells in vitro.

1,3,5-Tri-O-benzoyl-a-L-ribofuranose is a synthetic sugar with a complex carbohydrate structure. It is synthesized by the sequential addition of benzoyl groups to the alditol acetal of ribose. The molecular weight of this compound is 598.6 g/mol and its CAS number is 171866-30-1. 1,3,5-Tri-O-benzoyl-a-L-ribofuranose has been shown to be an excellent substrate for glycosylation and methylation reactions due to the presence of three reactive hydroxyl groups that can react with nucleophiles such as amines or thiols. Methylation reactions are typically carried out in the presence of sodium methoxide in methanol at room temperature for several hours. Glycosylation reactions require the use of activated glycosyl donors such as UDP glucose, UDP galactose

Ethyl 2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-b-D-thioglucopyranoside is a modified carbohydrate that has been synthesized by the click modification of an acetylated triose. This chemical was synthesized by reacting ethyl 2-(2'-deoxy-(1->4)-beta--D--glucopyranoside) with trimethylsilylacetamide and copper(I) chloride in dry tetrahydrofuran. This product has high purity and is used as a research tool for glycobiology.

Isosorbide dinitrate is used to treat chronic bronchitis and congestive heart failure. It dilates blood vessels, allowing more oxygen-rich blood to reach the heart. Isosorbide dinitrate is also used to relieve chest pain (angina) and reduce complications after a heart attack. Isosorbide dinitrate is a prodrug that is converted in vivo to its active form, isosorbide mononitrate, by the enzyme nitric oxide synthase in response to hypoxia. In addition, it has been shown that this drug reduces levels of low-density lipoprotein cholesterol (LDL-C) and may be useful for the treatment of high cholesterol.
The mechanism of action for reducing LDL-C levels is not known but may be due to increased clearance of LDL-C from plasma or decreased production of very low density lipoproteins (VLDL). This medication does not affect triglycerides or high density lip

Non-reducing storage and transport sugar in woody plants; used as a sweetener

The compound 1,4-dideoxy-1,4-imino-L-altritol is a synthetic carbohydrate that is made of a monosaccharide and an oligosaccharide. The monosaccharide is a simple sugar with the chemical formula C5H10O5. The oligosaccharide has the chemical formula C2n+1(C3H3O3)n. The monosaccharide has four carbons and one oxygen molecule. The oligosaccharide also has five carbon atoms, but it also has three oxygen molecules. The two sugars are linked by a glycosidic linkage.
The compound was created to be used in the synthesis of complex carbohydrates. It can be modified to have fluorine atoms added to it, methyl groups added to it, or both. It can also be modified to make it into an ester or an amide. It is soluble in water and alcohol

1,3,4,6-Tetra-O-acetyl-2-deoxy-2-trichloroacetamido-b-D-glucopyranose is a synthetic polysaccharide. It is a monosaccharide that has been custom synthesized and modified with methylation and fluorination. The chemical structure of this product is an oligosaccharide composed of six glucose units linked by acetal bonds. 1,3,4,6-Tetra-O-acetyl-2-deoxy-2-trichloroacetamido b D glucopyranose is available for sale as a research chemical in the US and Canada.
1,3,4,6 Tetra O Acetyl 2 Deoxy 2 Trichloroacetamido b D Glucopyranose (1)

D-Glucoheptonic acid-1,4-lactone is a chiral compound that can be used as an enantiomer of the natural sugar glucose. The human liver has been shown to metabolize this compound into proton and an analog of glucofuranose. This means that D-Glucoheptonic acid-1,4-lactone is able to be broken down by glycosidases. D-Glucoheptonic acid-1,4-lactone also inhibits α-L-rhamnosidase and other enzymes responsible for the breakdown of carbohydrates. This inhibition may lead to increased blood glucose levels in humans. D-Glucoheptonic acid-1,4-lactone has been shown to have inhibitory activities against both bacterial and mammalian enzymes. Hydrogen fluoride (HF) was used as a catalyst in the synthesis of this compound with benzylidene acetal

The interaction of 1,3,4,6-tetra-O-acetyl-2-deoxy-2-phthalimido-b-D-glucopyranoside with DNA is selective for the hydroxyl group and for the stacking of its glycosidic bonds. The data obtained from the spectra show that this compound interacts with the sugar moiety of nucleosides to yield a product with a lower melting point. The binding constants are high and the yields are low.

Intermediate for synthesis of N-acetyllactosaminic glycans

Trehalose-6,6'-dibehenate (TDB) is a novel synthetic lipid that has been shown to have beneficial effects in the treatment of inflammatory bowel disease. This compound may act as an anti-inflammatory agent by inhibiting toll-like receptor 4 (TLR4)-mediated signaling and TLR4-dependent production of proinflammatory cytokines. TDB also inhibits HIV infection by interfering with CD4+ T cell function and decreasing the number of CD4+ cells in the gut. In addition, TDB has been shown to be effective against lps-induced inflammatory response in cell culture.