Date published: 2025-10-15

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MAD1 Inhibitors

Chemical inhibitors of MAD1 constitute a diverse group of compounds that indirectly modulate the spindle assembly checkpoint (SAC) where MAD1 is a critical component. These inhibitors do not target MAD1 directly, but by interfering with various cellular and molecular pathways, they can alter the activity and regulation of MAD1, thereby influencing the SAC. Compounds such as Atrazine and Griseofulvin target cellular division processes and microtubule dynamics, respectively, which are essential for the proper function of the mitotic checkpoint. By doing so, they can indirectly stabilize the mitotic checkpoint complex, affecting the role of MAD1 in cell cycle arrest. Microtubule dynamics inhibitors, including Vinblastine, Nocodazole, Colchicine, and Thiabendazole, hinders the proper formation of the spindle apparatus, thus activating the SAC and enhancing MAD1's activity in the checkpoint pathway. Inhibitors like Monastrol and S-Trityl-L-cysteine specifically inhibit kinesin motor proteins, leading to spindle formation disruption and subsequent activation of the SAC, involving MAD1 indirectly to maintain cell cycle integrity. CDK inhibitors, such as Purvalanol A, halt cell cycle progression, which may upregulate MAD1 function within the SAC to hinder premature progression to anaphase. Furthermore, inhibitors targeting kinase activities like ZM447439 and BI 2536, which inhibit Aurora kinase and Plk1 respectively, interfere with spindle checkpoint responses, altering MAD1 activity as part of the checkpoint mechanism. The actions of these compounds, therefore, not only underscore the multifaceted nature of the mitotic checkpoint regulation involving MAD1 but also illustrate the complex interplay between various molecular pathways and cell cycle checkpoints. This class of MAD1 inhibitors, through their diverse mechanisms, emphasizes the critical nature of the SAC and its components in maintaining cellular homeostasis and genomic integrity.

Items 1 to 10 of 12 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Atrazine

1912-24-9sc-210846
5 g
$165.00
1
(1)

Atrazine interferes with the hormonal and cell division processes. It inhibits cyclin-dependent kinases (CDKs) necessary for cell cycle progression which can lead to a stabilization of the mitotic checkpoint complex, indirectly influencing MAD1's role in cell cycle arrest.

Monastrol

254753-54-3sc-202710
sc-202710A
1 mg
5 mg
$120.00
$233.00
10
(1)

Monastrol is a known kinesin Eg5 inhibitor. By blocking Eg5, monastrol disrupts the formation of bipolar spindles, which can lead to the activation of the spindle assembly checkpoint, thereby potentially enhancing MAD1's checkpoint function and delaying the cell cycle.

Griseofulvin

126-07-8sc-202171A
sc-202171
sc-202171B
5 mg
25 mg
100 mg
$83.00
$216.00
$586.00
4
(2)

Griseofulvin disrupts microtubule function by binding to tubulin, leading to mitotic arrest. It can augment the spindle assembly checkpoint where MAD1 plays a critical role, thus indirectly acting as a MAD1 pathway modulator by promoting its checkpoint activity.

Vinblastine

865-21-4sc-491749
sc-491749A
sc-491749B
sc-491749C
sc-491749D
10 mg
50 mg
100 mg
500 mg
1 g
$100.00
$230.00
$450.00
$1715.00
$2900.00
4
(0)

Vinblastine binds to tubulin, inhibiting microtubule formation. This destabilization of microtubules can indirectly increase the activity of the spindle assembly checkpoint, consequently increasing MAD1 activity in cell cycle arrest.

Nocodazole

31430-18-9sc-3518B
sc-3518
sc-3518C
sc-3518A
5 mg
10 mg
25 mg
50 mg
$58.00
$83.00
$140.00
$242.00
38
(2)

Nocodazole disrupts microtubule polymerization leading to cell cycle arrest at the mitotic phase. This activates the spindle assembly checkpoint and, thus, potentially increases the involvement of MAD1 in this checkpoint activation.

Colchicine

64-86-8sc-203005
sc-203005A
sc-203005B
sc-203005C
sc-203005D
sc-203005E
1 g
5 g
50 g
100 g
500 g
1 kg
$98.00
$315.00
$2244.00
$4396.00
$17850.00
$34068.00
3
(2)

Colchicine binds to tubulin, inhibiting microtubule polymerization and thereby activating the spindle assembly checkpoint. This arrest in cell cycle progression can indirectly enhance MAD1's role in checkpoint surveillance.

Purvalanol A

212844-53-6sc-224244
sc-224244A
1 mg
5 mg
$71.00
$291.00
4
(2)

Purvalanol A is a selective inhibitor of CDKs. By inhibiting CDK1, it can lead to cell cycle arrest at G2/M, thereby activating spindle checkpoint proteins including MAD1 to prevent premature anaphase onset.

ZM-447439

331771-20-1sc-200696
sc-200696A
1 mg
10 mg
$150.00
$349.00
15
(1)

ZM447439 is an Aurora kinase inhibitor that disrupts chromosome alignment and can indirectly enhance the spindle assembly checkpoint's response, potentially upregulating MAD1 activity as a part of this checkpoint mechanism.

S-Trityl-L-cysteine

2799-07-7sc-202799
sc-202799A
1 g
5 g
$31.00
$65.00
6
(1)

S-Trityl-L-cysteine is a selective inhibitor of Eg5. By inhibiting this kinesin, it causes mitotic arrest and enhances the spindle checkpoint response, which can indirectly influence the MAD1-dependent cell cycle arrest function.

Thiabendazole

148-79-8sc-204913
sc-204913A
sc-204913B
sc-204913C
sc-204913D
10 g
100 g
250 g
500 g
1 kg
$31.00
$82.00
$179.00
$306.00
$561.00
5
(1)

Thiabendazole inhibits microtubule assembly. This leads to mitotic spindle disruption, which in turn can enhance the spindle assembly checkpoint's response, potentially involving MAD1 activation to inhibit cell progression.