Date published: 2025-11-24

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COQ10B Inhibitors

Chemical inhibitors of COQ10B function primarily by reducing the availability of substrates necessary for its role in the biosynthesis of coenzyme Q10 (CoQ10). Statins, a class of chemicals including atorvastatin, simvastatin, rosuvastatin, lovastatin, pravastatin, fluvastatin, cerivastatin, pitavastatin, and mevastatin, operate by inhibiting the enzyme HMG-CoA reductase. This enzyme is crucial in the mevalonate pathway, which is the upstream process for the synthesis of several important molecules, including CoQ10. By inhibiting HMG-CoA reductase, statins limit the production of mevalonate and its derivatives, which are required substrates for the function of COQ10B in the biosynthesis of CoQ10. Consequently, these statins functionally inhibit COQ10B by creating a substrate deficiency for its enzymatic activity, effectively hampering the synthesis of CoQ10. Other chemical inhibitors interfere with different enzymes that are part of or associated with the biosynthetic pathway of CoQ10. For example, aminobenzotriazole is a broad-spectrum cytochrome P450 inhibitor that can prevent the post-translational modifications necessary for the proper function of COQ10B. By inhibiting these modifications, aminobenzotriazole can functionally inhibit COQ10B activity. Diphenyleneiodonium chloride targets flavoenzymes, which are potentially involved in electron transfer processes essential for CoQ10 biosynthesis. Inhibition of these enzymes can disrupt the electron transfer necessary for COQ10B's enzymatic activity, resulting in functional inhibition. Additionally, terbinafine inhibits squalene epoxidase, an enzyme upstream in the cholesterol biosynthesis pathway, which also serves as a precursor pathway for CoQ10 biosynthesis. By inhibiting the conversion of squalene, terbinafine reduces the availability of crucial substrates for COQ10B, leading to its functional inhibition.

Items 1 to 10 of 11 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Atorvastatin

134523-00-5sc-337542A
sc-337542
50 mg
100 mg
$252.00
$495.00
9
(1)

Atorvastatin inhibits HMG-CoA reductase, a rate-determining enzyme in the biosynthesis of coenzyme Q10 (CoQ10). Since COQ10B is involved in the biosynthesis of CoQ10, the reduction of CoQ10 precursor levels due to atorvastatin can functionally inhibit COQ10B by limiting its substrate availability.

Simvastatin

79902-63-9sc-200829
sc-200829A
sc-200829B
sc-200829C
50 mg
250 mg
1 g
5 g
$30.00
$87.00
$132.00
$434.00
13
(1)

Simvastatin, another HMG-CoA reductase inhibitor, decreases the synthesis of mevalonate, a precursor in the CoQ10 biosynthesis pathway. This would result in a lower availability of substrates required for COQ10B function, thereby functionally inhibiting it.

Rosuvastatin

287714-41-4sc-481834
10 mg
$142.00
8
(0)

Rosuvastatin works similarly to other statins by inhibiting HMG-CoA reductase. By limiting the synthesis of mevalonic acid, the availability of substrates for COQ10B is decreased, which functionally inhibits the enzymatic activity of COQ10B in the CoQ10 biosynthesis process.

Lovastatin

75330-75-5sc-200850
sc-200850A
sc-200850B
5 mg
25 mg
100 mg
$28.00
$88.00
$332.00
12
(1)

Lovastatin inhibits the HMG-CoA reductase enzyme, which is upstream in the CoQ10 biosynthetic pathway. By doing so, it reduces the levels of intermediates required for COQ10B activity, effectively functionally inhibiting COQ10B.

Pravastatin, Sodium Salt

81131-70-6sc-203218
sc-203218A
sc-203218B
25 mg
100 mg
1 g
$68.00
$159.00
$772.00
2
(1)

Pravastatin inhibits HMG-CoA reductase, leading to a reduction in mevalonate, and ultimately ubiquinone (CoQ10) precursors. This results in functionally inhibiting COQ10B by starving it of its necessary substrates.

Fluvastatin

93957-54-1sc-279169
50 mg
$250.00
(0)

Fluvastatin's inhibition of HMG-CoA reductase ultimately reduces the levels of farnesyl-PP and isoprenoids, essential substrates for CoQ10 biosynthesis, which COQ10B is a part of. This functionally inhibits COQ10B by reducing substrate availability.

Cerivastatin, Sodium Salt

143201-11-0sc-207418
2.5 mg
$175.00
(1)

Cerivastatin inhibits HMG-CoA reductase, which decreases the production of mevalonate and its downstream products necessary for CoQ10 biosynthesis. This lack of substrates functionally inhibits COQ10B.

Mevastatin (Compactin)

73573-88-3sc-200853
sc-200853A
10 mg
50 mg
$75.00
$175.00
18
(1)

Mevastatin inhibits HMG-CoA reductase, thereby reducing the synthesis of mevalonate, a vital precursor in CoQ10 biosynthesis. This limits the substrates necessary for COQ10B function, resulting in its functional inhibition.

1-Aminobenzotriazole

1614-12-6sc-200600
sc-200600A
50 mg
100 mg
$60.00
$131.00
6
(0)

Aminobenzotriazole is a non-selective inhibitor of cytochrome P450 enzymes, which can be involved in the post-translational modifications necessary for COQ10B function. Inhibition of these enzymes can thus functionally inhibit COQ10B by preventing its proper modification and subsequent activity.

Diphenyleneiodonium chloride

4673-26-1sc-202584E
sc-202584
sc-202584D
sc-202584A
sc-202584B
sc-202584C
10 mg
25 mg
50 mg
100 mg
250 mg
500 mg
$148.00
$133.00
$311.00
$397.00
$925.00
$1801.00
24
(1)

Diphenyleneiodonium chloride inhibits flavoenzymes, which can include those involved in the biosynthesis of CoQ10. Inhibition of these enzymes can lead to functional inhibition of COQ10B by disrupting the electron transfer required for its enzymatic activity.