CEP-1 Hormonal Regulation of Circulating Endothelial Progenitor Cells and HDL-C in Men

Summary

The original purpose of this research study was to understand the effects of testosterone (T) and estrogen on stem cells in the blood. The knowledge would be used to help understand the effects of T and estrogen on cardiovascular (heart and blood vessel) disease, and to help in the development of a safe male hormonal contraceptive. The effect of androgens on the number of circulating endothelial progenitor (CEP) cells would best be observed in group 1 (placebo). Upon observation of group 1 under original protocol, changes in CEP cells were not significant but there were changes in markers of inflammation, lipids, and HDL protein composition. A modification to the protocol and title were made to reflect this for groups 2 and 3: Hormonal regulation of HDL-C in Men.

Timeline

Start

2008-12

Primary completion

2010-05

Completion

2010-05

Publications

• Background Phillips GB. Is atherosclerotic cardiovascular disease an endocrinological disorder? The estrogen-androgen paradox. J Clin Endocrinol Metab. 2005 May;90(5):2708-11. doi: 10.1210/jc.2004-2011. Epub 2005 Feb 1.
• Background Bebb RA, Anawalt BD, Christensen RB, Paulsen CA, Bremner WJ, Matsumoto AM. Combined administration of levonorgestrel and testosterone induces more rapid and effective suppression of spermatogenesis than testosterone alone: a promising male contraceptive approach. J Clin Endocrinol Metab. 1996 Feb;81(2):757-62. doi: 10.1210/jcem.81.2.8636300.
• Background Wu FC, von Eckardstein A. Androgens and coronary artery disease. Endocr Rev. 2003 Apr;24(2):183-217. doi: 10.1210/er.2001-0025.
• Background Keating NL, O'Malley AJ, Smith MR. Diabetes and cardiovascular disease during androgen deprivation therapy for prostate cancer. J Clin Oncol. 2006 Sep 20;24(27):4448-56. doi: 10.1200/JCO.2006.06.2497.
• Background Smith MR. Changes in fat and lean body mass during androgen-deprivation therapy for prostate cancer. Urology. 2004 Apr;63(4):742-5. doi: 10.1016/j.urology.2003.10.063.
• Background Smith MR, Finkelstein JS, McGovern FJ, Zietman AL, Fallon MA, Schoenfeld DA, Kantoff PW. Changes in body composition during androgen deprivation therapy for prostate cancer. J Clin Endocrinol Metab. 2002 Feb;87(2):599-603. doi: 10.1210/jcem.87.2.8299.
• Background Smith MR, Lee H, Nathan DM. Insulin sensitivity during combined androgen blockade for prostate cancer. J Clin Endocrinol Metab. 2006 Apr;91(4):1305-8. doi: 10.1210/jc.2005-2507. Epub 2006 Jan 24.
• Background Braga-Basaria M, Dobs AS, Muller DC, Carducci MA, John M, Egan J, Basaria S. Metabolic syndrome in men with prostate cancer undergoing long-term androgen-deprivation therapy. J Clin Oncol. 2006 Aug 20;24(24):3979-83. doi: 10.1200/JCO.2006.05.9741.
• Background Werner N, Kosiol S, Schiegl T, Ahlers P, Walenta K, Link A, Bohm M, Nickenig G. Circulating endothelial progenitor cells and cardiovascular outcomes. N Engl J Med. 2005 Sep 8;353(10):999-1007. doi: 10.1056/NEJMoa043814.
• Background Werner N, Junk S, Laufs U, Link A, Walenta K, Bohm M, Nickenig G. Intravenous transfusion of endothelial progenitor cells reduces neointima formation after vascular injury. Circ Res. 2003 Jul 25;93(2):e17-24. doi: 10.1161/01.RES.0000083812.30141.74. Epub 2003 Jun 26.
• Background Vasa M, Fichtlscherer S, Aicher A, Adler K, Urbich C, Martin H, Zeiher AM, Dimmeler S. Number and migratory activity of circulating endothelial progenitor cells inversely correlate with risk factors for coronary artery disease. Circ Res. 2001 Jul 6;89(1):E1-7. doi: 10.1161/hh1301.093953.
• Background Dong C, Goldschmidt-Clermont PJ. Endothelial progenitor cells: a promising therapeutic alternative for cardiovascular disease. J Interv Cardiol. 2007 Apr;20(2):93-9. doi: 10.1111/j.1540-8183.2007.00251.x.
• Background Foresta C, Caretta N, Lana A, De Toni L, Biagioli A, Ferlin A, Garolla A. Reduced number of circulating endothelial progenitor cells in hypogonadal men. J Clin Endocrinol Metab. 2006 Nov;91(11):4599-602. doi: 10.1210/jc.2006-0763. Epub 2006 Aug 22.
• Background Foresta C, Zuccarello D, Biagioli A, De Toni L, Prana E, Nicoletti V, Ambrosini G, Ferlin A. Oestrogen stimulates endothelial progenitor cells via oestrogen receptor-alpha. Clin Endocrinol (Oxf). 2007 Oct;67(4):520-5. doi: 10.1111/j.1365-2265.2007.02918.x. Epub 2007 Jun 15.
• Background Foresta C, Zuccarello D, De Toni L, Garolla A, Caretta N, Ferlin A. Androgens stimulate endothelial progenitor cells through an androgen receptor-mediated pathway. Clin Endocrinol (Oxf). 2008 Feb;68(2):284-9. doi: 10.1111/j.1365-2265.2007.03036.x. Epub 2007 Sep 4.
• Background Iwakura A, Luedemann C, Shastry S, Hanley A, Kearney M, Aikawa R, Isner JM, Asahara T, Losordo DW. Estrogen-mediated, endothelial nitric oxide synthase-dependent mobilization of bone marrow-derived endothelial progenitor cells contributes to reendothelialization after arterial injury. Circulation. 2003 Dec 23;108(25):3115-21. doi: 10.1161/01.CIR.0000106906.56972.83. Epub 2003 Dec 15.
• Background Bergt C, Pennathur S, Fu X, Byun J, O'Brien K, McDonald TO, Singh P, Anantharamaiah GM, Chait A, Brunzell J, Geary RL, Oram JF, Heinecke JW. The myeloperoxidase product hypochlorous acid oxidizes HDL in the human artery wall and impairs ABCA1-dependent cholesterol transport. Proc Natl Acad Sci U S A. 2004 Aug 31;101(35):13032-7. doi: 10.1073/pnas.0405292101. Epub 2004 Aug 23.
• Background Leder BZ, LeBlanc KM, Schoenfeld DA, Eastell R, Finkelstein JS. Differential effects of androgens and estrogens on bone turnover in normal men. J Clin Endocrinol Metab. 2003 Jan;88(1):204-10. doi: 10.1210/jc.2002-021036.
• Background Mostaghel EA, Page ST, Lin DW, Fazli L, Coleman IM, True LD, Knudsen B, Hess DL, Nelson CC, Matsumoto AM, Bremner WJ, Gleave ME, Nelson PS. Intraprostatic androgens and androgen-regulated gene expression persist after testosterone suppression: therapeutic implications for castration-resistant prostate cancer. Cancer Res. 2007 May 15;67(10):5033-41. doi: 10.1158/0008-5472.CAN-06-3332.
• Background Page ST, Lin DW, Mostaghel EA, Hess DL, True LD, Amory JK, Nelson PS, Matsumoto AM, Bremner WJ. Persistent intraprostatic androgen concentrations after medical castration in healthy men. J Clin Endocrinol Metab. 2006 Oct;91(10):3850-6. doi: 10.1210/jc.2006-0968. Epub 2006 Aug 1.
• Background Page ST, Plymate SR, Bremner WJ, Matsumoto AM, Hess DL, Lin DW, Amory JK, Nelson PS, Wu JD. Effect of medical castration on CD4+ CD25+ T cells, CD8+ T cell IFN-gamma expression, and NK cells: a physiological role for testosterone and/or its metabolites. Am J Physiol Endocrinol Metab. 2006 May;290(5):E856-63. doi: 10.1152/ajpendo.00484.2005. Epub 2005 Dec 13.
• Background Herbst KL, Coviello AD, Page S, Amory JK, Anawalt BD, Bremner WJ. A single dose of the potent gonadotropin-releasing hormone antagonist acyline suppresses gonadotropins and testosterone for 2 weeks in healthy young men. J Clin Endocrinol Metab. 2004 Dec;89(12):5959-65. doi: 10.1210/jc.2003-032123.
• Background Mauras N, Lima J, Patel D, Rini A, di Salle E, Kwok A, Lippe B. Pharmacokinetics and dose finding of a potent aromatase inhibitor, aromasin (exemestane), in young males. J Clin Endocrinol Metab. 2003 Dec;88(12):5951-6. doi: 10.1210/jc.2003-031279.
• Background Lin EH, Hassan M, Li Y, Zhao H, Nooka A, Sorenson E, Xie K, Champlin R, Wu X, Li D. Elevated circulating endothelial progenitor marker CD133 messenger RNA levels predict colon cancer recurrence. Cancer. 2007 Aug 1;110(3):534-42. doi: 10.1002/cncr.22774.
• Background Hill JM, Zalos G, Halcox JP, Schenke WH, Waclawiw MA, Quyyumi AA, Finkel T. Circulating endothelial progenitor cells, vascular function, and cardiovascular risk. N Engl J Med. 2003 Feb 13;348(7):593-600. doi: 10.1056/NEJMoa022287.
• Background Gonzalo IT, Swerdloff RS, Nelson AL, Clevenger B, Garcia R, Berman N, Wang C. Levonorgestrel implants (Norplant II) for male contraception clinical trials: combination with transdermal and injectable testosterone. J Clin Endocrinol Metab. 2002 Aug;87(8):3562-72. doi: 10.1210/jcem.87.8.8710.
• Results Rubinow KB, Snyder CN, Amory JK, Hoofnagle AN, Page ST. Acute testosterone deprivation reduces insulin sensitivity in men. Clin Endocrinol (Oxf). 2012 Feb;76(2):281-8. doi: 10.1111/j.1365-2265.2011.04189.x.
• Results Rubinow KB, Tang C, Hoofnagle AN, Snyder CN, Amory JK, Heinecke JW, Page ST. Acute sex steroid withdrawal increases cholesterol efflux capacity and HDL-associated clusterin in men. Steroids. 2012 Apr;77(5):454-60. doi: 10.1016/j.steroids.2012.01.002. Epub 2012 Jan 15.

Drugs

Indications

No indication recorded.