Palbociclib (PD-0332991) HCl

Catalog No.S1116 Batch:S111616

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Technical Data

Formula

C24H29N7O2.HCl
Molecular Weight 483.99 CAS No. 827022-32-2
Solubility (25°C)* In vitro DMSO 14 mg/mL (28.92 mM)
Water 12 mg/mL (24.79 mM)
Ethanol Insoluble
In vivo (Add solvents to the product individually and in order)
Clear solution
Saline
6.0mg/ml Taking the 1 mL working solution as an example, add 6 mg of this product to 1 ml of physiological saline (0.9% NaCL solution), mix evenly to make it clear, 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 Palbociclib (PD-0332991) HCl is a highly selective inhibitor of CDK4/6 with IC50 of 11 nM/16 nM in cell-free assays, respectively. It shows no activity against CDK1/2/5, EGFR, FGFR, PDGFR, InsR, etc. Phase 3.
Targets
CDK4/CyclinD3 [1]
(Cell-free assay)		 CDK4/CyclinD1 [1]
(Cell-free assay)		 CDK6/CyclinD2 [1]
(Cell-free assay)
9 nM 11 nM 15 nM
In vitro PD 0332991 has little effect on other protein kinases including EGFR, FGFR, PGFR, IR. PD 0332991 is a non-ATP competitive inhibitor of Cdk4. PD 0332991 inhibits MDA-MB-435 breast carcinoma cells with IC50 of 66 nM, which is due to reduced Rb phosphorylation at Ser780. PD 0332991 inhibits thymidine incorporation into the DNA of Rb-positive human breast, colon, and lung carcinomas as well as human leukemias, with IC50 values ranging from 0.04-0.17 μM. PD 0332991 shows no activity in Rb-negative cells. PD 0332991 causes an accumulation of cells in G1 in MDA-MB-453 breast and Colo-205 carcinoma cells. [1] PD 0332991 also shows activity in 5T33MM myeloma cells (immunocompetent model) and sensitizes the cells to killing by bortezomib. [2] PD 0332991 inhibits luminal ER-positive as well as HER2-amplified breast cancer cell lines including MDA-MB-175, ZR-75-30, CAMA-1, MDA-MB-134, HCC-202 and UACC-893. PD 0332991 enhances the activity of tamoxifen and trastuzumab in these cell lines. PD 0332991 enhances the sensitivity of tamoxifen in the MCF7 tamoxifen-resistant cells. [3] A recent study shows that PD 0332991 could suppress malignant rhabdoid tumor (MRT) cell lines including MP-MRT-AN, KP-MRT-RY, G401, KP-MRT-NS and the sensitivity of the MRT cell lines to PD 0332991 is inversely correlated with expression of p16. [4]
In vivo PD 0332991 indicates complete tumor stasis in a MDA-MB-435 xenograft at 150 mg/kg. PD 0332991 also shows broad-spectrum antitumor activity in multiple human tumor xenografts by eliminating phospho-Rb and the proliferative marker Ki-67 from tumor tissue and down-regulation of genes under the transcriptional control of E2F. [1]
Features Non-cytotoxic, and halts cancer cell growth & could be used in glioblastoma that has relapsed after temozolomide treatment (a chemotherapeutic used to treat many cancers).

Protocol (from reference)

Kinase Assay:

[1]
  • Cdk Assays

    A stock solution of PD0332991 is prepared in DMSO. CDK assays are performed in 96-well filter plates. All CDK-cyclin kinase complexes are expressed in insect cells through baculovirus infection and purified. The substrate for the assays is a fragment (amino acids 792–928) of pRb fused to GST (GST·RB-Cterm). The total volume in each well is 0.1 mL containing a final concentration of 20 mM Tris-HCl, pH 7.4, 50 mM NaCl, 1 mM dithiothreitol, 10 mM MgCl2, 25 μM ATP (for CDK4-cyclin D1, CDK6-cyclin D2, and CDK6-cyclin D3) or 12 μM ATP (for CDK2-cyclin E, CDK2-cyclin A, and CDC2-cyclin B) containing 0.25 μCi of [γ-32P]ATP, 20 ng of enzyme, 1 μg of GST·RB-Cterm, and PD 0332991 (0.001-0.1μM). All components except the [γ-32P]ATP are added to the wells, and the plate is placed on a plate mixer for 2 min. The reaction is started by adding the [γ-32P]ATP and the plate is incubated at 25 °C for 15 min. The reaction is terminated by addition of 0.1 mL of 20% trichloroacetic acid and the plate is kept at 4  °C for at least 1 hour to allow the substrate to precipitate. The wells are then washed 5 times with 0.2 mL of 10% trichloroacetic acid and radioactive incorporation is determined with a β plate counter.
Cell Assay:

[1]
  • Cell lines

    Tumor cell lines including MDA-MB-435, ZR-75-1, T-47D, MCF-7, H1299, Colo-205, MDA-MB-468, H2009, CRRF-CEM and K562

  • Concentrations

    0.01-1 μM

  • Incubation Time

    24 hours

  • Method

    Cells are seeded at 2 × 104 per well in a 96-well plate and incubated overnight. PD 0332991 (0.01-1 μM) is added to the wells and incubated at 37 °C for another 24 hours. [14C]Thymidine (0.1 μCi) is added to each well and incorporation of the radiolabel is allowed to proceed for 72 hours. Incorporated radioactivity is determined with a β plate counter.
Animal Study:

[1]
  • Animal Models

    Advanced stage human tumor xenografts including Colo-205, MDA-MB-435 breast, SF-295 glioblastoma, ZR-75-1 breast, PC-3 prostate, H125 lung, SW-620 colon, H23 lung and MDA-MB-468 breast (Rb negative) are established in severe combined immunodeficient mice.

  • Dosages

    0-150 mg/kg

  • Administration

    Given by gavage

Customer Product Validation

Data from [Pharmacogenomics J, 2013, 13(1), 94-104]

Data from [Clin Transl Oncol, 2012, 14(3), 197-206 ]

Data from [Clin Cancer Res, 2011, 17(13), 4513-22]

, , Dr. Gao Zhang of University of Pennsylvania

Selleck's Palbociclib (PD-0332991) HCl has been cited by 481 publications

An intermediate Rb-E2F activity state safeguards proliferation commitment [ Nature, 2024, 631(8020):424-431] PubMed: 38926571
Defining the KRAS- and ERK-dependent transcriptome in KRAS-mutant cancers [ Science, 2024, 384(6700):eadk0775] PubMed: 38843331
Chronic stress increases metastasis via neutrophil-mediated changes to the microenvironment [ Cancer Cell, 2024, S1535-6108(24)00037-0] PubMed: 38402610
Cyclin-dependent kinase 4 drives cystic kidney disease in the absence of mTORC1 signaling activity [ Kidney Int, 2024, S0085-2538(24)00627-6] PubMed: 39218392
Reciprocal antagonism of PIN1-APC/CCDH1 governs mitotic protein stability and cell cycle entry [ Nat Commun, 2024, 15(1):3220] PubMed: 38622115
A renal clearable fluorogenic probe for in vivo β-galactosidase activity detection during aging and senolysis [ Nat Commun, 2024, 15(1):775] PubMed: 38278798
Uncoupling of mTORC1 from E2F activity maintains DNA damage and senescence [ Nat Commun, 2024, 15(1):9181] PubMed: 39448567
Comprehensive multi-omics analysis reveals WEE1 as a synergistic lethal target with hyperthermia through CDK1 super-activation [ Nat Commun, 2024, 15(1):2089] PubMed: 38453961
Type II topoisomerases shape multi-scale 3D chromatin folding in regions of positive supercoils [ Mol Cell, 2024, S1097-2765(24)00830-X] PubMed: 39486417
A p38 MAPK-ROS axis fuels proliferation stress and DNA damage during CRISPR-Cas9 gene editing in hematopoietic stem and progenitor cells [ Cell Rep Med, 2024, 5(11):101823] PubMed: 39536752

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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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