Paprotrain

Paprotrain
Cat. No. : CS-6861 CAS No. : 57046-73-8
M. Wt. : 245.2786
Size Stock Price Quantity Add to Cart Quotation Online
5mg In-stock $50.0
10mg In-stock $70.0
25mg In-stock $120.0
50mg In-stock $190.0
100mg In-stock $340.0
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  • Data Sheet

  • Introduction

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  • COA & Spectra

Name: Paprotrain; 
Cat. No. : CS-6861
CAS No. : 57046-73-8
Formula: C16H11N3
M. Wt. : 245.2786
Solubility: DMSO: ≥100 mg/mL

Activity:

Paprotrain is a cell-permeable inhibitor of the kinesin MKLP-2 and shows a moderate inhibition activity on DYRK1A with an IC50 of 5.5 μM. IC50 & Target: IC50: 5.5 μM (DYRK1A)[1] In Vitro: Paprotrain has been screened on a panel of CNS kinases. While inactive (IC50 >10 μM) on CDK5 and GSK3, it has shown a moderate activity on DYRK1A (IC50=5.5 μM)[1]. Time-lapse microscopy shows that disrupting MKlp2 expression with paprotrain results in polar body extrusion failure. This could be rescued after rescuing oocytes from paprotrain in fresh medium. Cell cycle analysis shows that most oocytes are arrested at metaphase I or telophase I. However, oocyte spindle structure and chromosome alignment are not disrupted after the inhibition of MKlp2 by paprotrain[2]. Paprotrain-treated porcine oocytes suffer failure of nuclear maturation. The number of oocytes arrested at early MI stage increase in a dose-dependent manner after KIF20A activity inhibition, while the percentage of oocytes that reach ATI and MII stages decrease after treatment[3].

Protocol:

Kinase Assay: [1]Kinase activities for each enzyme are assayed in the presence of 15 μM ATP in a final volume of 30 μL. After 30 min incubation at 30°C, the reaction is stopped by harvesting, using a FilterMate harvester, onto P81 phosphocellulose papers which are washed in 1% phosphoric acid. 20 μL of scintillation fluid are added and the incorporated radioactivity measured in a Packard counter. Blank values are subtracted and activities calculated as pmoles of phosphate incorporated during the 30 min incubation. Controls are performed with appropriate dilutions of DMSO. Kinase activities are expressed in % of maximal activity, i.e. in the absence of inhibitors (Paprotrain). IC50 values are obtained from the dose-response curves[1]. Cell Assay: Paprotrain is diluted to50 mM stock solution in dimethyl sulfoxide (DMSO) and stored at −20°C. At the beginning of each culture, the stock solution is diluted with TCM199 to reach final concentrations of 10, 20 and 50 µM[3].[3] COCs or denuded oocytes (DOs) are cultured in the presence/absence of Paprotrain in vitro. The control groups are performed with pure DMSO at the same concentration. COCs are denuded of their cumulus cells by gentle pipetting with 0.1% (w/v) hyaluronidase. Oocytes with clearly extruded polar bodies are judged to be matured oocytes. After cultured for 44 h, the polar body extrusion rate of matured oocytes is observed using a microscope. Furthermore, chromosomal alignments and the cell cycle of oocytes treated with inhibitor are examined using laser scan confocal microscopy[3].

References:

Labrière C, et al. Further investigation of Paprotrain: Towards the conception of selective and multi-targeted CNS kinase inhibitors. Eur J Med Chem. 2016 Nov 29;124:920-934.

Zhang Y, et al. KIF20A regulates porcine oocyte maturation and early embryo development.

Liu J, et al. MKlp2 inhibitor paprotrain affects polar body extrusion during mouse oocyte maturation. Reprod Biol Endocrinol. 2013 Dec 21;11:117.

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