Date published: 2026-5-30

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ORG Inhibitors

Osteocalcin, also known as bone gamma-carboxyglutamic acid-containing protein (BGLAP) or ORG, is a non-collagenous protein found in bone and dentin. It is secreted by osteoblasts and is involved in the regulation of bone mineralization. Osteocalcin's unique structure allows it to bind to hydroxyapatite, the mineral component of bone, and contributes to the structural integrity of the bone matrix. This protein undergoes a post-translational carboxylation process, which grants it the ability to bind calcium ions and, subsequently, mineralize to the bone matrix. Its role is crucial in the bone remodeling process, where old bone tissue is replaced by new tissue. Given its importance in bone biology, understanding the regulation and function of osteocalcin has been of prime interest to researchers in the field.

ORG inhibitors, or osteocalcin inhibitors, represent a class of compounds that target and inhibit the function or production of osteocalcin. The mechanisms by which these inhibitors operate can vary. Some may prevent the synthesis of osteocalcin by osteoblasts, while others might inhibit its post-translational modifications, rendering it non-functional. Yet another subset may hinder the binding of osteocalcin to hydroxyapatite, thus affecting bone mineralization.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Prednisone

53-03-2sc-205816
sc-205816A
sc-205816B
1 g
5 g
25 g
$42.00
$136.00
$676.00
2
(1)

Glucocorticoids like prednisone can inhibit osteoblast function, leading to reduced osteoblast expression.

SB 431542

301836-41-9sc-204265
sc-204265A
sc-204265B
1 mg
10 mg
25 mg
$82.00
$216.00
$416.00
48
(1)

SB431542 inhibits TGF-β, which promotes osteoblast differentiation, potentially reducing osteocalcin expression.

Alendronate acid

66376-36-1sc-337520
5 g
$135.00
2
(0)

Alendronate inhibits bone resorption, potentially affecting osteocalcin expression indirectly.

6-Propyl-2-thiouracil

51-52-5sc-214383
sc-214383A
sc-214383B
sc-214383C
10 g
25 g
100 g
1 kg
$37.00
$56.00
$224.00
$1997.00
(0)

Thyroid hormones affect osteocalcin; propylthiouracil can reduce its expression by antagonizing thyroid hormones.

Tamoxifen

10540-29-1sc-208414
2.5 g
$272.00
18
(2)

Estrogen affects bone metabolism; tamoxifen, an estrogen receptor modulator, might influence osteocalcin expression.

Rosiglitazone

122320-73-4sc-202795
sc-202795A
sc-202795C
sc-202795D
sc-202795B
25 mg
100 mg
500 mg
1 g
5 g
$120.00
$326.00
$634.00
$947.00
$1259.00
38
(1)

Being a PPARγ agonist, rosiglitazone can decrease osteoblast differentiation, potentially reducing osteocalcin expression.

Dexamethasone

50-02-2sc-29059
sc-29059B
sc-29059A
100 mg
1 g
5 g
$91.00
$139.00
$374.00
36
(1)

As a glucocorticoid, dexamethasone might suppress osteoblast activity and osteocalcin production.

Warfarin

81-81-2sc-205888
sc-205888A
1 g
10 g
$73.00
$246.00
7
(1)

Warfarin interferes with vitamin K-dependent carboxylation, which is essential for osteocalcin's function; it might affect osteocalcin expression