DAPT

Catalog No.S2215 Batch:S221510

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Technical Data

Formula

C23H26F2N2O4
Molecular Weight 432.46 CAS No. 208255-80-5
Solubility (25°C)* In vitro DMSO 86 mg/mL (198.86 mM)
Ethanol 86 mg/mL (198.86 mM)
Water Insoluble
In vivo (Add solvents to the product individually and in order)
Clear solution
5%DMSO 40%PEG300 5%Tween80 50%ddH2O
0.55mg/ml Taking the 1 mL working solution as an example, add 50 μL of 11 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to make it clear; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results. 
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description DAPT is a novel γ-secretase inhibitor, which inhibits Aβ production with IC50 of 20 nM in HEK 293 cells. DAPT enhances the apoptosis of human tongue carcinoma cells and regulates autophagy.
Targets
Notch [1] Aβ [1]
(HEK 293 cells)
20 nM
In vitro In human primary neuronal cultures, DAPT also shows inhibitory effects on Aβ production with IC50 of 115 nM and 200 nM respectively for Aβ total and Aβ42, which is 5-10-fold lower than is observed in HEK 293 cells. [1] A recent study shows that DAPT inhibits the proliferation of SK-MES-1 cells in a concentration-dependent manner with IC50 of 11.3 μM. In addition, DAPT also induces caspase-dependent and caspase-independent apoptosis in lung squamous cell carcinoma cells by inhibiting Notch receptor signaling pathway. [2]
In vivo DAPT administration (100mg/kg) leads to a robust and sustained pharmacodynamic effect in PDAPP mice that DAPT levels in the brain exceeds 100 ng/g within 1 hour and persists up to 18 hours after administration, with peak levels of 490 ng/g observed after 3 hour. And during the period, DAPT (100 mg/kg) also reduces the cortical total Aβ and Aβ42 in a dose-dependent manner with a 50% reduction. [1] In rat cerebral cortexes, DAPT (40 mg/kg) suppresses the LPS-induced activity of γ-secretase and increases the cell apoptosis with the prolonged neuroinflammation. [3]

Protocol (from reference)

Kinase Assay:[1]
  • In vitro Aβ reduction assays

    Human embryonic kidney cells (American Type Culture Collection CRL-1573), transfected with the gene for APP751 (HEK 293) are used for routine Aβ reduction assays. Cells are plated in 96-well plates and allowed to adhere overnight in Dulbecco's modified Eagle medium (DMEM) supplemented with 10% heat-inactivated fetal bovine serum. DAPT are diluted from stock solutions in dimethylsulfoxide (DMSO) to yield a final concentration equal to 0.1% DMSO in media. Cells are pre-treated for 2 hours at 37 °C with DAPT, media are aspirated off and fresh compound solutions applied. After an additional 2-hour treatment period, conditioned media is drawn off and analyzed by a sandwich ELISA (266–3D6) specific for total Aβ. Reduction of Aβ production is measured relative to control cells treated with 0.1% DMSO and expressed as a percentage inhibition. Data from at least six doses in duplicate are fitted to a four-parameter logistical model using XLfit software in order to determine potency. Human and PDAPP mouse neuronal cultures are grown in serum-free media to enhance their neuronal characteristics, and appeared to be greater than 90% neurons after maturation prior to use. Conditioned media to establish baseline Aβ values are collected by adding fresh media to each well and incubated for 24 hours at 37 °C in the absence of DAPT. Cultures are then treated with fresh media containing DAPT at the desired range of concentrations for an additional 24 hours at 37 °C, and conditioned media collected. For the measurement of total Aβ, samples are analyzed with the same ELISA (266–3D6) as used for the HEK 293 cell assays. Analyses of samples for Aβ42 production are performed by a separate ELISA (21F12–3D6) that utilizes a capture antibody specific for the Aβ42 C-terminus. Inhibition of production for both total Aβ and Aβ42 are determined by the difference between the values for the compound treatment and baseline periods. After plotting percentage inhibition versus DAPT concentration, data are analyzed with XLfit software, as above, to determine potency.
Cell Assay:[2]
  • Cell lines

    SK-MES-1

  • Concentrations

    2.5 μM to 160 μM

  • Incubation Time

    72 hours

  • Method

    Cells are seeded into 96-well plates and exposed to 0.1% DMSO or DAPT at concentrations in the range of 2.5 μM–160 μM for 72 hours. Cytotoxicity is determined with 3-(4, 5)-dimethylthiahiazo-(-z-y1)-3, 5-di-phenytetrazoliumromide (MTT) dye reduction assay with minor modifications. Briefly, after incubation with DAPT, 20 μL MTT solution (5 mg/mL in PBS) is added to 180 μL medium in each well and plates are incubated for 4 hours at 37 °C, and subsequently 150 μL DMSO is added to each well, and mixed by shaking at room temperature for 15 minutes. Absorption is measured by an enzyme-linked immunosorbent assay at 490 nm to determine absorbance values. α-MEM supplemented with the same amount of MTT solution and solvent is used as blank solution. The IC50 value is calculated using PROBIT program in SPSS.
Animal Study:[1]
  • Animal Models

    Heterozygous PDAPP transgenic mice overexpressing the APPV717F mutant form of the amyloid precursor protein.

  • Dosages

    ≤100 mg/kg

  • Administration

    Administered via p.o.

Customer Product Validation

Data from [Data independently produced by Oncogene, 2014, 10.1038/onc.2014.319]

Data from [Data independently produced by Stem Cells, 2014, 32(1), 301-12]

Data from [Data independently produced by Dis Model Mech, 2013, 6(6), 1494-506]

Data from [Invest Ophth Vis Sci, 2012, 53,12 ]

Selleck's DAPT has been cited by 424 publications

Mapping multimodal phenotypes to perturbations in cells and tissue with CRISPRmap [ Nat Biotechnol, 2024, 10.1038/s41587-024-02386-x] PubMed: 39375448
Pericyte phenotype switching alleviates immunosuppression and sensitizes vascularized tumors to immunotherapy in preclinical models [ J Clin Invest, 2024, 134(18)e179860] PubMed: 39286984
Mechanosensitive protein polycystin-1 promotes periosteal stem/progenitor cells osteochondral differentiation in fracture healing [ Theranostics, 2024, 14(6):2544-2559] PubMed: 38646641
HiHo-AID2: boosting homozygous knock-in efficiency enables robust generation of human auxin-inducible degron cells [ Genome Biol, 2024, 25(1):58] PubMed: 38409044
High glutamine increases stroke risk by inducing the endothelial-to-mesenchymal transition in moyamoya disease [ MedComm (2020), 2024, 5(5):e525] PubMed: 38628905
Immune evasion in lung metastasis of leiomyosarcoma: upregulation of EPCAM inhibits CD8+ T cell infiltration [ Br J Cancer, 2024, 10.1038/s41416-024-02576-z] PubMed: 38291183
A splice site variant in MADD affects hormone expression in pancreatic β cells and pituitary gonadotropes [ JCI Insight, 2024, 9(10)e167598] PubMed: 38775154
TGF-β modulates cell fate in human ES cell-derived foregut endoderm by inhibiting Wnt and BMP signaling [ Stem Cell Reports, 2024, 19(7):973-992] PubMed: 38942030
Defining cis-regulatory elements and transcription factors that control human cortical interneuron development [ iScience, 2024, 27(6):109967] PubMed: 38827400
GelMA/PEDOT:PSS Composite Conductive Hydrogel-Based Generation and Protection of Cochlear Hair Cells through Multiple Signaling Pathways [ Biomolecules, 2024, 14(1)95] PubMed: 38254695

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

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