Abstract
Newborn rat adrenocortical cells were successfully cultured in a serum free carrier protein free medium (SPFM) by using α-cyclodextrin as a cholesterol carrier and have expressed corticosteroid biosynthesis in this medium. A stable inclusion complex of cholesterol-α-cyclodextrin with a molar ratio of almost 1 was obtained for a 5 × 10−5 mol/1 α-cyclodextrin concentration. Cell cultures incubated with [4-14C] cholesterol-α-cyclodextrin in SPFM produced, under ACTH stimulation, various 14C labeled steroids with a predominance of corticosterone and 18-hydroxy-11-deoxycorticosterone. As measured by gas chromatography and mass spectrometry, the ratio between corticosteroids (21-hydroxylated steroids) and 20α-reduced steroids produced in SPFM with cholesterol-α-cyclodextrin was equal to 1.8. This corresponds to a value of 3.6 times higher than that found in the serum free medium with cholesterol-albumin. Consequently, the chemically defined SPFM with cholesterol-α-cyclodextrin used in this study is more suitable for corticosteroidogenesis by adrenal cells in culture than a serum free medium with cholesterol-albumin.
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Abbreviations
- α-CD:
-
α-cyclodextrin
- ACTH:
-
adrenocorticotropic hormone
- 20α-dihydroprogesterone:
-
20α-hydroxy-4-pregnene-3-one
- 11β-hydroxy-20α-dihydroprogesterone:
-
11β, 20α-dihydroxy-4-pregnene-3-one
- 11β-hydroxyprogesterone:
-
11β-hydroxy-4-pregnene-3,20-dione
- C-α-CD:
-
cholesterol-α-cyclodextrin complex
- corticosterone:
-
11β,21-dihydroxy-4-pregnene-3,20-dione
- deoxycorticosterone:
-
21-hydroxy-4-pregnene-3,20-dione
- 18-hydroxy-11-deoxycorticosterone:
-
18,21-dihydroxy-4-pregnene-3,20-dione
- 18-hydroxy-20α-dihydroprogesterone:
-
18-20α-dihydroxy-4-pregnene-3-one
- 18-hydroxyprogesterone:
-
18-hydroxy4-pregnene-3,20-dione
- progesterone:
-
4-pregnene-3,20-dione
- SFM-S:
-
serum-free medium
- SPFM:
-
serum-free protein-free medium
- SSM:
-
serum supplemented medium
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Hammami, M., Maume, G. & Maume, B.F. Expression of ACTH-induced corticosteroid biosynthesis in newborn rat adrenocortical cells cultured in serum-free and carrier protein-free medium containing a cholesterol-α-cyclodextrin complex. Cell Biol Toxicol 2, 41–52 (1986). https://doi.org/10.1007/BF00117706
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DOI: https://doi.org/10.1007/BF00117706