Effects of amphetamine on steroidogenesis in MA-10 mouse Leydig tumor cells

Liang Yu Chen, Yuan Li Huang, Ming-Yi Liu, Sew Fen Leu, Bu-Miin Huang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Amphetamine influences plasma and testicular testosterone levels. However, there is no evidence that amphetamine can directly influence Leydig cell functions. In the present study, a MA-10 mouse Leydig tumor cell line was used to determine whether and how amphetamine affected Leydig cell steroidogenesis. MA-10 cells were treated with different concentrations of amphetamine without or with human chorionic gonadotropin (hCG) and/or enzyme precursors over different time durations. Steroid production, enzyme activities and StAR protein expression were determined. Amphetamine alone had no any effect on MA-10 cell steroidogenesis. However, amphetamine (10-11M and 10-10M) significantly enhanced hCG-treated progesterone production at 3 hr in MA-10 cells (p < 0.05). Furthermore, amphetamine significantly induced more progesterone production upon treatment with 22R-hydroxycholesterol (p < 0.05), a precursor of P450 side-chain cleavage enzyme (P450scc). However, amphetamine did not induce more progesterone production when treated with pregnenolone (p > 0.05), a precursor of 3β-hydroxysteroid dehydrogenase. In addition, the expressions of StAR protein and P450scc enzyme were not significantly different between hCG alone and hCG plus amphetamine treatment in MA-10 cells (p > 0.05). These results suggested that amphetamine enhanced hCG-induced progesterone production in MA-10 cells by increasing P450scc activity without influencng StAR protein and P450scc enzyme expression or 3β-HSD enzyme activity.

Original languageEnglish
Pages (from-to)1983-1995
Number of pages13
JournalLife Sciences
Volume72
Issue number17
DOIs
Publication statusPublished - 2003 Mar 14

Fingerprint

Leydig Cell Tumor
Amphetamine
Tumors
Cells
Chorionic Gonadotropin
Leydig Cells
Enzyme activity
Enzymes
Progesterone
3-Hydroxysteroid Dehydrogenases
Enzyme Precursors
Proteins
Tumor Cell Line
Testosterone
Steroids
Plasmas

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

Cite this

Chen, Liang Yu ; Huang, Yuan Li ; Liu, Ming-Yi ; Leu, Sew Fen ; Huang, Bu-Miin. / Effects of amphetamine on steroidogenesis in MA-10 mouse Leydig tumor cells. In: Life Sciences. 2003 ; Vol. 72, No. 17. pp. 1983-1995.
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Effects of amphetamine on steroidogenesis in MA-10 mouse Leydig tumor cells. / Chen, Liang Yu; Huang, Yuan Li; Liu, Ming-Yi; Leu, Sew Fen; Huang, Bu-Miin.

In: Life Sciences, Vol. 72, No. 17, 14.03.2003, p. 1983-1995.

Research output: Contribution to journalArticle

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AB - Amphetamine influences plasma and testicular testosterone levels. However, there is no evidence that amphetamine can directly influence Leydig cell functions. In the present study, a MA-10 mouse Leydig tumor cell line was used to determine whether and how amphetamine affected Leydig cell steroidogenesis. MA-10 cells were treated with different concentrations of amphetamine without or with human chorionic gonadotropin (hCG) and/or enzyme precursors over different time durations. Steroid production, enzyme activities and StAR protein expression were determined. Amphetamine alone had no any effect on MA-10 cell steroidogenesis. However, amphetamine (10-11M and 10-10M) significantly enhanced hCG-treated progesterone production at 3 hr in MA-10 cells (p < 0.05). Furthermore, amphetamine significantly induced more progesterone production upon treatment with 22R-hydroxycholesterol (p < 0.05), a precursor of P450 side-chain cleavage enzyme (P450scc). However, amphetamine did not induce more progesterone production when treated with pregnenolone (p > 0.05), a precursor of 3β-hydroxysteroid dehydrogenase. In addition, the expressions of StAR protein and P450scc enzyme were not significantly different between hCG alone and hCG plus amphetamine treatment in MA-10 cells (p > 0.05). These results suggested that amphetamine enhanced hCG-induced progesterone production in MA-10 cells by increasing P450scc activity without influencng StAR protein and P450scc enzyme expression or 3β-HSD enzyme activity.

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