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PC SPES Dietary supplement of chrysanthemum, licorice, ginseng, saw palmetto, scutellaria, and three other herbs Used for advanced prostate cancer Small.

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Presentation on theme: "PC SPES Dietary supplement of chrysanthemum, licorice, ginseng, saw palmetto, scutellaria, and three other herbs Used for advanced prostate cancer Small."— Presentation transcript:

1 PC SPES Dietary supplement of chrysanthemum, licorice, ginseng, saw palmetto, scutellaria, and three other herbs Used for advanced prostate cancer Small Phase I/II studies suggest safety, improved quality of life, reduction of pain, and lower PSA levels (Pfeifer, BJU Int., 2000) Loss of libido, breast tenderness, and lower PSA levels associated with potent estrogenic activity (DiPaola, NEJM, 1998)

2 PC SPES for Prostate Cancer
P.I. Adrian S. Dobs, MD, MHS, Johns Hopkins University Background Multiple, small pre-clinical and clinical studies Enrollment 100 men with hormone-refractory disease, rising PSAs Design Double-blind, randomized controlled trial vs. estradiol Sites Johns Hopkins and Singapore Endpoints Disease progression, PSA, quality of life, safety

3 Identification of PC SPES-Regulated Genes in Prostate Epithelial Cells
Nelson, 2001

4 Dietary Supplement Research
Effectiveness Mechanisms Interactions

5 Yoga Prayer Meditation Homeopathy Naturopathy
CAM Domains Manipulative and Body-Based Systems Biologically Based Systems Diets Herbals Massage Chiropractic Common CAM Practices Yoga Prayer Meditation Reiki Magnets Qi qong Mind-Body Medicine Energy Therapies Homeopathy Naturopathy Alternative Medical Systems

6 What Is Hypnosis? Intense focus on a suggested response leads to involuntary changes in perception, mood, memory, or physiology Subject of great controversy and popular misunderstandings since developed by Mesmer in 18th C. France

7 Hypnosis Alters Color Processing in the Brain
8 hypnotizable subjects viewed identical patterns in color or gray scale during PET scanning Randomly told to see color or gray scale Blood flow to cortical color processing regions increased when asked to perceive color and decreased when told to see gray scale, regardless of what they were actually shown Kosslyn SM, Thompson, WL, Spiegel D, et al. Am J Psychiatry 2000;157:

8 Kosslyn SM, Thompson, WL, Spiegel D, et al
Kosslyn SM, Thompson, WL, Spiegel D, et al. Am J Psychiatry 2000;157:

9 Kosslyn SM, Thompson, WL, Spiegel D, et al
Kosslyn SM, Thompson, WL, Spiegel D, et al. Am J Psychiatry 2000;157:

10 Kosslyn SM, Thompson, WL, Spiegel D, et al
Kosslyn SM, Thompson, WL, Spiegel D, et al. Am J Psychiatry 2000;157:

11 The Placebo Historically, an inactive or innocent management contrivance to encourage healing in the absence of specific therapeutics Relied upon to “control” for nonspecific effects that might confound calculation of the true benefits of a novel intervention

12 The Placebo – A ‘Pious Fraud’
“One of the most successful physicians I have ever known has assured me that he used more bread pills, drops of coloured water, and powders of hickory ashes, than all other medicines put together.” Thomas Jefferson ( )

13 ‘The Powerful Placebo’
Analysis of the aggregate percentage of patients satisfactorily relieved by a placebo across multiple clinical trials 1082 patients in 15 controlled trials 35.2 ± 2.2% “average significant effectiveness” HK Beecher, JAMA, 1955

14 ‘The Powerless Placebo’
Systematic review of outcomes for 8525 subjects in 116 controlled trials No overall benefit attributable to placebo Significant differences only for continuous subjective outcomes 27% (95% CI of 15-40%) reduction in pain associated with placebo Hrobjartsson & Gotzche, NEJM, 2001

15 “Such a report can hardly negate an experienced physician’s awe at a phenomenon that might impress even a dispassionate biometrician, should he ever venture within the range of a real patient.” S.B. Nuland, The American Scholar, 2001

16 Placebo Analgesia: Spatially Specific and Mediated by Endogenous Opioid Systems
Pain induced in all 4 limbs with capsaicin Patients told they were to receive a powerful local anesthetic Placebo cream applied to 1 limb Analgesia achieved only in the treated limb Analgesia abolished by IV naloxone Benedetti et al., J Neurosci, 1999

17 Right Hand Left Hand Placebo Placebo Right Foot Left Foot expectation
10 10 pain pain 15 15 minutes minutes Left Hand Right Hand expectation Placebo Placebo expectation Left Foot Right Foot 10 10 pain pain 15 15 minutes minutes Benedetti et al. 1999

18 Naloxone Right Hand Left Hand Placebo Placebo Right Foot Left Foot
10 10 pain pain 15 15 minutes minutes Left Hand Right Hand Placebo expectation Naloxone Placebo expectation Left Foot Right Foot 10 10 pain pain 15 15 minutes minutes

19 This Is Your Brain on Placebo
rostral anterior cingulate cortex Placebo and Opioid Analgesia - Imaging a Shared Neuronal Network Petrovic, PP et al. February ; /science , Science Express Reports

20 The Placebo Effect Relieves pain Works through the opioid system
Anatomically specific Shares the same neuronal pathways as narcotics

21 BMJ Books March 6, 2002 RFAs Edited by: Harry A. Guess Arthur Kleinman
John W. Kusek Linda W. Engel RFAs Elucidation of the Underlying Mechanisms of Placebo Effect The Placebo Effect in Clinical Practice

22 Evidence Leads to Understanding
Potential benefits of dietary supplements may be offset by untoward drug interactions.

23 Evidence Leads to Understanding
The mind-body dialogue yields powerful, even surprising, physiological responses.

24 Understanding Leads to Acceptance
CAM will be integrated with conventional medicine as science affords a fuller understanding of its benefits and risks.

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29 Professor of the History of Science Harvard University July 18, 2002
Charles Rosenberg, Ph.D. Professor of the History of Science Harvard University July 18, 2002 Alternative to What? Complementary to Whom? On Some Aspects of Medicine's Scientific Identity Arthur Kleinman, M.D. Professor of Social Anthropology Harvard University Lillian Presley Professor of Medical Anthropology and Psychiatry Harvard Medical School November 7, 2002 The Global Transformation of Health Care: Cultural and Ethical Challenges to Medicine

30 N a t i o n a l C e n t e r f o r C o m p l e m e n t a r y a n d A l t e r n a t i v e M e d i c i n e


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