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In vitro transcription of capped mRNA with modified nucleotides and Poly(A) tail
TSA (Tyramide Signal Amplification), used for signal amplification of ISH, IHC and IC etc.
Separation of phosphorylated and non-phosphorylated proteins without phospho-specific antibody
A convenient and sensitive way for cell proliferation assay and cytotoxicity assay
Protect the integrity of proteins from multiple proteases and phosphatases for different applications.
Sitagliptin phosphate monohydrate is the phosphate salt of its active component, sitagliptin, with one molecule of water. Sitagliptin is a potent inhibitor of dipeptidyl peptidase 4 (DPP-4), an enzyme catalyzing the cleavage of peptides with an N-terminal alanine or proline amino acid residue, that selectively inhibits DPP-4 with 50% inhibition concentration IC50 value of 18 nM and shows no affinity towards other DDP enzymes (such as DDP-8 and DDP-9). The inhibition of DPP4 by sitagliptin has been found to be mediated by increasing levels of two DPP-4 substrates, including glucagon-like peptide-1 (GLP-1) and gastric inhibitory polypeptide (GIP). Sitagliptin is currently being investigated in the treatment of type II diabetes.
Reference
Gallwitz B. Review of sitagliptin phosphate: a novel treatment for type 2 diabetes. Vasc Health Risk Manag. 2007;3(2):203-10.
Cell lines
Endothelial progenitor cells (EPCs) and bone marrow mesenchymalstem cells(MSC)
Preparation method
The solubility of this compound in DMSO is >10 mM. General tips for obtaining a higher concentration: Please warm the tube at 37 °C for 10 minutes and/or shake it in the ultrasonic bath for a while.Stock solution can be stored below -20°C for several months.
Reaction Conditions
14 d; 25 μmol/L
Applications
To determine whether sitagliptin treatment participated in enhancing the differentiation of EPCs and MSCs and cells expressing its ligand, SDF-1α, adipose tissues were co-cultured with sitagliptin (25 μmol/L) in M199 culture medium for 14 d and examined by flow cytometric analysis. The results show that compared with the 7 d cell culture, the numbers of EPCs [CD31/Sca-1+(double-stained) and CXCR4+ (single-stained)] were remarkably higher at day 14 in both the non-sitagliptin-treated (Si-T) group and the Si-T group
Animal models
ApoE−/−mice with the C57BL/6 genetic background
Dosage form
200 mg/kg/day; oral taken
In ApoE−/−mice, the sitagliptin group showed fewer atherosclerotic plaques than in controls (7.64±1.98% [range 4.62–10.13%] vs 12.91±1.15% [range 11.55–14.37%], p
Other notes
Please test the solubility of all compounds indoor, and the actual solubility may slightly differ with the theoretical value. This is caused by an experimental system error and it is normal.
References:
[1] Chua S, Sheu J J, Chen Y L, et al. Sitagliptin therapy enhances the number of circulating angiogenic cells and angiogenesis—evaluations< i> in vitroand in the rat critical limb ischemia model[J]. Cytotherapy, 2013, 15(9): 1148-1163.
[2] Zeng Y, Li C, Guan M, et al. The DPP-4 inhibitor sitagliptin attenuates the progress of atherosclerosis in apolipoprotein-E-knockout mice via AMPK-and MAPK-dependent mechanisms[J]. Cardiovascular diabetology, 2014, 13(1): 32.