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PD 0325901

≥98% (HPLC)

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Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:

Quality Level


≥98% (HPLC)



optical activity

[α]/D -1.8 to -3.5°, c = 1 mg/mL in methanol


white to off-white


DMSO: 20 mg/mL, clear

storage temp.


SMILES string




InChI key


Gene Information


PD 0325901 has been used as an inhibitor in extracellular signal-regulated kinase (ERK) inhibition assay in primed induced pluripotent stem cells, RKO colorectal cancer cell line and human embryonic stem cells(hESCs).

Biochem/physiol Actions

PD 0325901 by inhibiting mitogen-activated protein kinases (MAPKs) elicits growth-inhibitory and antiangiogenic effects on glioblastoma and melanoma tumor progression.
PD 0325901 is a potent MKK1 (MEK1) and MKK2 (MEK2) inhibitor. The Ki is 1.1 and 0.79 nM for MEK1 and MEK2, respectively. PD 0325901 was inactive against a panel of 27 other kinases. PD 0325901 inhibited C26 tumor pERK by 75% when dosed at 25 mg/kg in mice.

Features and Benefits

This compound is featured on the MAPKKKs page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.


Skull and crossbonesHealth hazard

Signal Word


Hazard Statements

Hazard Classifications

Acute Tox. 3 Oral - Aquatic Chronic 4 - STOT RE 2

Storage Class Code

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Growth-inhibitory and antiangiogenic activity of the MEK inhibitor PD0325901 in malignant melanoma with or without BRAF mutations
Ciuffreda L, et al.
Neoplasia, 11(8), 720-W6-720-W6 (2009)
Madeleine Linneberg-Agerholm et al.
Development (Cambridge, England), 146(24) (2019-11-20)
Embryonic stem cells (ESCs) exist in at least two states that transcriptionally resemble different stages of embryonic development. Naïve ESCs resemble peri-implantation stages and primed ESCs the pre-gastrulation epiblast. In mouse, primed ESCs give rise to definitive endoderm in response
Inhibition of glioblastoma dispersal by the MEK inhibitor PD0325901
Shannon S, et al.
BMC Cancer, 17(1), 121-121 (2017)
Feeder-Free Derivation of Naive Human Pluripotent Stem Cells
Ward E, et al.
Stem Cells and Development, 26(15), 1087-1089 (2017)
Bin Zhang et al.
The Journal of clinical investigation, 126(3), 975-991 (2016-02-16)
Chronic myelogenous leukemia (CML) results from transformation of a long-term hematopoietic stem cell (LTHSC) by expression of the BCR-ABL fusion gene. However, BCR-ABL-expressing LTHSCs are heterogeneous in their capacity as leukemic stem cells (LSCs). Although discrepancies in proliferative, self-renewal, and


The extracellular signal regulated kinase (ERK1 and ERK2) pathways are activated by mitogens and play an important role in controlling cell growth and differentiation.

Naive pluripotent stem cells are located within the epiblast of mature blastocysts. These primitive “ground-state” cells may be cultured in vitro using specialized media and small molecule inhibitors.

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