| RRC ID |
42964
|
| 著者 |
Takeuchi S, Mukai N, Tateishi T, Miyakawa S.
|
| タイトル |
Production of sex steroid hormones from DHEA in articular chondrocyte of rats.
|
| ジャーナル |
Am J Physiol Endocrinol Metab
|
| Abstract |
Dehydroepiandrosterone (DHEA), a precursor of sex steroid hormones, is synthesized by cholesterol side-chain cleavage cytochrome P-450 and 17alpha-hydroxylase cytochrome P-450 mainly from cholesterol and converted to testosterone and estrogen by 3beta-hydroxysteroid dehydrogenase (3beta-HSD), 17beta-HSD, and aromatase cytochrome P-450. Although sex steroid hormones have important effects in the protection of articular cartilage, it is unclear whether articular cartilage has a local steroidogenic enzymatic machinery capable of metabolizing DHEA. This study was aimed to clarify whether steroidogenesis-related enzymes are expressed in articular chondrocytes, whether expression levels are changed by DHEA, and whether articular chondrocytes are capable of synthesizing sex steroid hormones from DHEA. Articular chondrocytes isolated from adult rats were cultured with DHEA for 3 days. All of the mRNA expressions of steroidogenesis-related enzymes were detected in cultured articular chondrocytes of rats, but the mRNA expression levels of testosterone and estradiol in cultured media increased after the addition of DHEA. These findings provided the first evidence that articular chondrocytes expressed steroidogenesis-related enzyme genes and that they are capable of locally synthesizing sex steroid hormones locally from DHEA.
|
| 巻・号 |
293(1)
|
| ページ |
E410-5
|
| 公開日 |
2007-7-1
|
| DOI |
10.1152/ajpendo.00042.2007
|
| PII |
00042.2007
|
| PMID |
17473054
|
| MeSH |
17-Hydroxysteroid Dehydrogenases / genetics
17-Hydroxysteroid Dehydrogenases / metabolism
3-Hydroxysteroid Dehydrogenases / genetics
3-Hydroxysteroid Dehydrogenases / metabolism
Animals
Aromatase / genetics
Aromatase / metabolism
Cartilage, Articular / cytology
Cartilage, Articular / enzymology*
Cartilage, Articular / metabolism*
Cells, Cultured
Cholesterol Side-Chain Cleavage Enzyme / genetics
Cholesterol Side-Chain Cleavage Enzyme / metabolism
Chondrocytes / drug effects
Chondrocytes / enzymology*
Chondrocytes / metabolism*
Collagen Type II / genetics
Collagen Type II / metabolism
Dehydroepiandrosterone / metabolism*
Dehydroepiandrosterone / pharmacology
Dose-Response Relationship, Drug
Female
Gene Expression Regulation, Enzymologic / drug effects
Gonadal Steroid Hormones / biosynthesis*
RNA, Messenger / metabolism
Rats
Rats, Sprague-Dawley
|
| IF |
3.469
|
| 引用数 |
17
|
|
WOS 分野
|
ENDOCRINOLOGY & METABOLISM
PHYSIOLOGY
|
| リソース情報 |
| ヒト・動物細胞 |
|
