Date published: 2025-11-27

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p21 Inhibitors

p21 inhibitors are a class of chemical compounds that specifically target and modulate the activity of p21, a protein involved in cell cycle regulation. The p21 protein, also known as cyclin-dependent kinase inhibitor 1, is a key player in regulating cell division and growth. It acts as a checkpoint protein, ensuring that cells undergo proper DNA replication and repair before progressing through the cell cycle. p21 inhibitors interact with the p21 protein, either by binding directly to it or by modulating its activity through various mechanisms. By inhibiting p21, these compounds can alter the cell cycle progression and impact cellular processes such as proliferation and differentiation. The discovery and development of p21 inhibitors have provided valuable tools for studying the intricate mechanisms governing cell cycle control and have contributed to a better understanding of the molecular pathways involved in cell growth and division. These inhibitors have also been instrumental in elucidating the roles of p21 in various biological contexts, such as tissue development, aging, and tumorigenesis. By selectively inhibiting p21, these compounds offer researchers a means to investigate the complex interplay between cell cycle regulation and various cellular processes, shedding light on fundamental aspects of cell biology.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Sterigmatocystin

10048-13-2sc-222329
sc-222329A
1 mg
5 mg
$74.00
$263.00
1
(1)

Sterigmatocystin is a notable p21 modulator that interacts intricately with cellular pathways, influencing the regulation of cell cycle checkpoints. Its unique structural attributes facilitate specific binding to regulatory proteins, altering their activity and stability. The compound exhibits distinctive reaction kinetics, characterized by a slow release mechanism that prolongs its effects on target interactions. Additionally, its hydrophobic characteristics enhance membrane permeability, allowing for deeper cellular penetration and modulation of signaling cascades.

Palbociclib

571190-30-2sc-507366
50 mg
$315.00
(0)

Also known as palbociclib, PD-0332991 is a selective inhibitor of cyclin-dependent kinases 4 and 6 (CDK4/6). By inhibiting CDK4/6, it indirectly suppresses p21 expression and promotes cell cycle progression.

PD 98059

167869-21-8sc-3532
sc-3532A
1 mg
5 mg
$39.00
$90.00
212
(2)

PD-98059 is a selective inhibitor of the mitogen-activated protein kinase kinase (MEK). It indirectly affects p21 expression by interfering with downstream signaling pathways involved in p21 regulation.

Abemaciclib

1231929-97-7sc-507342
10 mg
$110.00
(0)

LY2835219, or abemaciclib, is another CDK4/6 inhibitor that prevents phosphorylation of the retinoblastoma protein (pRb). This inhibition leads to the downregulation of p21 expression, promoting cell cycle progression.

Roscovitine

186692-46-6sc-24002
sc-24002A
1 mg
5 mg
$92.00
$260.00
42
(2)

Roscovitine is a broad-spectrum CDK inhibitor that targets multiple CDKs, including CDK2, CDK7, and CDKBy inhibiting CDK2, it reduces p21 phosphorylation and stabilizes its expression, causing cell cycle arrest.

Indirubin-3′-monoxime

160807-49-8sc-202660
sc-202660A
sc-202660B
1 mg
5 mg
50 mg
$77.00
$315.00
$658.00
1
(1)

Indirubin-3'-monoxime is a small molecule inhibitor that targets CDKs, including CDK1, CDK2, CDK4, and CDKIts inhibition of CDK2 reduces p21 phosphorylation and increases p21 expression, causing cell cycle arrest.

Flavopiridol

146426-40-6sc-202157
sc-202157A
5 mg
25 mg
$78.00
$254.00
41
(3)

Flavopiridol is a synthetic flavonoid that inhibits multiple CDKs, including CDK1, CDK2, CDK4, CDK6, and CDKIt affects p21 expression by modulating CDK activity, leading to cell cycle arrest.

Olomoucine

101622-51-9sc-3509
sc-3509A
5 mg
25 mg
$72.00
$274.00
12
(1)

Olomoucine is a purine derivative that inhibits CDK2, CDK5, and CDKIts inhibition of CDK2 results in the stabilization of p21 expression and subsequent cell cycle arrest.

NSC 625987

141992-47-4sc-203653
10 mg
$159.00
(0)

NSC 625987 is a small molecule compound that targets CDK2 and CDKIts inhibition of CDK2 upregulates p21 expression and induces cell cycle arrest.

SNS-032

345627-80-7sc-364621
sc-364621A
5 mg
10 mg
$169.00
$262.00
(1)

SNS-032 is a selective inhibitor of CDK9, which is involved in the regulation of transcription. By inhibiting CDK9, it indirectly affects p21 expression and modulates the cell cycle.