New 5?-reductase inhibitors: In vitro and in vivo effects
摘要:
The enzyme 5 alpha-reductase is responsible for the conversion of testosterone (T) to its more potent androgen dihydrotestosterone (DHT). This steroid had been implicated in androgen-dependent diseases such as: benign prostatic hyperplasia. prostate cancer, acne and androgenic alopecia. The inhibition of 5 alpha-reductase enzyme offers a potentially useful treatment for these diseases.In this study, we report the synthesis and pharmacological evaluation of several new 3-substituted pregna-4, 16-diene-6, 20-dione derivatives. These compounds were prepared from the commercially available 16-dehydropregnenolone acetate. The biological activity of the new steroidal derivatives was determined in vivo as well as in vitro experiments.In vivo experiments, the anti-androgenic effect of the steroids was demonstrated by the decrease of the weight of the prostate gland of gonadectomized hamster treated with T plus finasteride or the new steroids. The IC50 value of these steroids was determined by measuring the conversion of radio labeled T to DHT.The results of this study carried out with 5 alpha-reductase enzyme from hamster and human prostate showed that four of the six steroidal derivatives (5, 7, 9, 10) exhibited much higher 5 alpha-reductase inhibitory activity, as indicated by the IC50 values than the presently used Proscar 3 (finasteride).The comparison of the weight of the hamster's prostate gland indicated that compound 5 had a comparable weight decrease as finasteride. The overall data of this study showed very clearly those compounds 5, 7, 9, 10 are good inhibitors for the 5 alpha-reductase enzyme. (c) 2005 Elsevier Inc. All rights reserved.
The enzyme 5 alpha-reductase is responsible for the conversion of testosterone (T) to its more potent androgen dihydrotestosterone (DHT). This steroid had been implicated in androgen-dependent diseases such as: benign prostatic hyperplasia. prostate cancer, acne and androgenic alopecia. The inhibition of 5 alpha-reductase enzyme offers a potentially useful treatment for these diseases.In this study, we report the synthesis and pharmacological evaluation of several new 3-substituted pregna-4, 16-diene-6, 20-dione derivatives. These compounds were prepared from the commercially available 16-dehydropregnenolone acetate. The biological activity of the new steroidal derivatives was determined in vivo as well as in vitro experiments.In vivo experiments, the anti-androgenic effect of the steroids was demonstrated by the decrease of the weight of the prostate gland of gonadectomized hamster treated with T plus finasteride or the new steroids. The IC50 value of these steroids was determined by measuring the conversion of radio labeled T to DHT.The results of this study carried out with 5 alpha-reductase enzyme from hamster and human prostate showed that four of the six steroidal derivatives (5, 7, 9, 10) exhibited much higher 5 alpha-reductase inhibitory activity, as indicated by the IC50 values than the presently used Proscar 3 (finasteride).The comparison of the weight of the hamster's prostate gland indicated that compound 5 had a comparable weight decrease as finasteride. The overall data of this study showed very clearly those compounds 5, 7, 9, 10 are good inhibitors for the 5 alpha-reductase enzyme. (c) 2005 Elsevier Inc. All rights reserved.
Synthesis and cytotoxic effect on cancer cell lines and macrophages of novel progesterone derivatives having an ester or a carbamate function at C-3 and C-17
In this study we report the cytotoxic effect on human cancer cells of two series of novel progesterone derivatives; the first containing an aromatic ester (8a-e) or a carbamate functions both linked to C-3 (9a -e) on the pregn-4,16-diene-6,20-dione skeleton. In the second series, both functional groups (ester and carbamate) are bound to C-17 on the pregn-4,6-diene-3,20-dione scaffold (13a-e and 14a-e). The panel cancer cell lines used in this study were the following: PC-3 (human prostate cancer cell line), MCF-7 (human breast cancer cell line), HCT-15 (human colon cancer cell line) and J774 (noncancerous murine macrophages) for comparison.The results from this study showed that steroid 14a, having a carbamate function at C-17, was the most potent against PC-3 cell line (96.6%) while 8c and 8e showed much higher cytotoxic activity (100%) for MCF-7 cell line. Finally, compounds 8c and 14a displayed selective properties towards tumor cell lines than noncancerous murine macrophages. (C) 2014 Elsevier Masson SAS. All rights reserved.