Randomized Controlled Trial of Silymarin in Asthma

Summary

The purpose of this study is to determine if intake of the antioxidant enzyme inducer, silymarin, will improve lung function and symptom scores in participants with asthma.

Timeline

Start

2010-09

Primary completion

2010-09

Completion

2010-09

Publications

• Background Wu P, Roberts LJ 2nd, Shintani AK, Sheller JR, Minton PA, Higgins SB, Hartert TV. Changes in urinary dinor dihydro F(2)-isoprostane metabolite concentrations, a marker of oxidative stress, during and following asthma exacerbations. Free Radic Res. 2007 Sep;41(9):956-62. doi: 10.1080/10715760701444600.
• Background Britton JR, Pavord ID, Richards KA, Knox AJ, Wisniewski AF, Lewis SA, Tattersfield AE, Weiss ST. Dietary antioxidant vitamin intake and lung function in the general population. Am J Respir Crit Care Med. 1995 May;151(5):1383-7. doi: 10.1164/ajrccm.151.5.7735589.
• Background Fogarty A, Britton J. The role of diet in the aetiology of asthma. Clin Exp Allergy. 2000 May;30(5):615-27. doi: 10.1046/j.1365-2222.2000.00766.x. No abstract available.
• Background Grievink L, Smit HA, Ocke MC, van 't Veer P, Kromhout D. Dietary intake of antioxidant (pro)-vitamins, respiratory symptoms and pulmonary function: the MORGEN study. Thorax. 1998 Mar;53(3):166-71. doi: 10.1136/thx.53.3.166.
• Background Hatch GE. Asthma, inhaled oxidants, and dietary antioxidants. Am J Clin Nutr. 1995 Mar;61(3 Suppl):625S-630S. doi: 10.1093/ajcn/61.3.625S.
• Background Miedema I, Feskens EJ, Heederik D, Kromhout D. Dietary determinants of long-term incidence of chronic nonspecific lung diseases. The Zutphen Study. Am J Epidemiol. 1993 Jul 1;138(1):37-45. doi: 10.1093/oxfordjournals.aje.a116775.
• Background Comhair SA, Xu W, Ghosh S, Thunnissen FB, Almasan A, Calhoun WJ, Janocha AJ, Zheng L, Hazen SL, Erzurum SC. Superoxide dismutase inactivation in pathophysiology of asthmatic airway remodeling and reactivity. Am J Pathol. 2005 Mar;166(3):663-74. doi: 10.1016/S0002-9440(10)62288-2.
• Background Comhair SA, Bhathena PR, Dweik RA, Kavuru M, Erzurum SC. Rapid loss of superoxide dismutase activity during antigen-induced asthmatic response. Lancet. 2000 Feb 19;355(9204):624. doi: 10.1016/S0140-6736(99)04736-4.
• Background Gazak R, Walterova D, Kren V. Silybin and silymarin--new and emerging applications in medicine. Curr Med Chem. 2007;14(3):315-38. doi: 10.2174/092986707779941159.
• Background Weyhenmeyer R, Mascher H, Birkmayer J. Study on dose-linearity of the pharmacokinetics of silibinin diastereomers using a new stereospecific assay. Int J Clin Pharmacol Ther Toxicol. 1992 Apr;30(4):134-8.
• Background Wen Z, Dumas TE, Schrieber SJ, Hawke RL, Fried MW, Smith PC. Pharmacokinetics and metabolic profile of free, conjugated, and total silymarin flavonolignans in human plasma after oral administration of milk thistle extract. Drug Metab Dispos. 2008 Jan;36(1):65-72. doi: 10.1124/dmd.107.017566. Epub 2007 Oct 3.
• Background Nelson SK, Bose SK, Grunwald GK, Myhill P, McCord JM. The induction of human superoxide dismutase and catalase in vivo: a fundamentally new approach to antioxidant therapy. Free Radic Biol Med. 2006 Jan 15;40(2):341-7. doi: 10.1016/j.freeradbiomed.2005.08.043.
• Background Erzurum SC, Lemarchand P, Rosenfeld MA, Yoo JH, Crystal RG. Protection of human endothelial cells from oxidant injury by adenovirus-mediated transfer of the human catalase cDNA. Nucleic Acids Res. 1993 Apr 11;21(7):1607-12. doi: 10.1093/nar/21.7.1607.
• Background Roberts LJ, Morrow JD. Measurement of F(2)-isoprostanes as an index of oxidative stress in vivo. Free Radic Biol Med. 2000 Feb 15;28(4):505-13. doi: 10.1016/s0891-5849(99)00264-6.

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Indications