The effect of spiritual healing on in vitro tumour cell proliferation and viability--an experimental study
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The effect of spiritual healing on in vitro tumour cell proliferation and viability--an experimental study. / Zachariae, R; Højgaard, L; Zachariae, C; Vaeth, M; Bang, B; Skov, L.
In: B J C, Vol. 93, No. 5, 05.09.2005, p. 538-43.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - The effect of spiritual healing on in vitro tumour cell proliferation and viability--an experimental study
AU - Zachariae, R
AU - Højgaard, L
AU - Zachariae, C
AU - Vaeth, M
AU - Bang, B
AU - Skov, L
PY - 2005/9/5
Y1 - 2005/9/5
N2 - Alternative treatments such as spiritual healing and prayer are increasingly popular, especially among patients with life-threatening diseases such as cancer. According to theories of spiritual healing, this intervention is thought to influence living cells and organisms independently of the recipient's conscious awareness of the healer's intention. The aim of this study was to test the hypothesis that spiritual healing will reduce proliferation and viability of two cancer cell lines in vitro. Three controlled experiments were conducted with three different healers and randomised allocation of cells to five different doses of healing or control. Researchers conducting the assays and statistical analyses were blinded to the experimental conditions. Main outcome measures were MTT viability, 3H-thymidine incorporation and counts of an adherent human breast cancer cell line (MCF-7), and a nonadherent mouse B-lymphoid cell line (HB-94). Analyses of variance (ANOVAs) revealed no significant main or dose-related effects of spiritual healing compared to controls for either of the two cell lines or any of the assays (P-values between 0.09 and 0.96). When comparing healing and control across all three experimental days, doses, assays, and cells, 34 (51.6%) of 66 independent comparisons showed differences in the hypothesised direction (P = 0.90). The average effect size across cell lines, days, assays, and doses approached zero (Cohen's d = -0.01). The results do not support previous reports of beneficial effects of spiritual healing on malignant cell growth in vitro. Reported beneficial effects of spiritual healing on the well-being of cancer patients seem more likely to be mediated by psychosocial and psychophysiological effects of the healer-patient relationship.
AB - Alternative treatments such as spiritual healing and prayer are increasingly popular, especially among patients with life-threatening diseases such as cancer. According to theories of spiritual healing, this intervention is thought to influence living cells and organisms independently of the recipient's conscious awareness of the healer's intention. The aim of this study was to test the hypothesis that spiritual healing will reduce proliferation and viability of two cancer cell lines in vitro. Three controlled experiments were conducted with three different healers and randomised allocation of cells to five different doses of healing or control. Researchers conducting the assays and statistical analyses were blinded to the experimental conditions. Main outcome measures were MTT viability, 3H-thymidine incorporation and counts of an adherent human breast cancer cell line (MCF-7), and a nonadherent mouse B-lymphoid cell line (HB-94). Analyses of variance (ANOVAs) revealed no significant main or dose-related effects of spiritual healing compared to controls for either of the two cell lines or any of the assays (P-values between 0.09 and 0.96). When comparing healing and control across all three experimental days, doses, assays, and cells, 34 (51.6%) of 66 independent comparisons showed differences in the hypothesised direction (P = 0.90). The average effect size across cell lines, days, assays, and doses approached zero (Cohen's d = -0.01). The results do not support previous reports of beneficial effects of spiritual healing on malignant cell growth in vitro. Reported beneficial effects of spiritual healing on the well-being of cancer patients seem more likely to be mediated by psychosocial and psychophysiological effects of the healer-patient relationship.
KW - Breast Neoplasms
KW - Cell Proliferation
KW - Cell Survival
KW - Humans
KW - Lymphoma, B-Cell
KW - Spiritual Therapies
KW - Tumor Cells, Cultured
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
U2 - 10.1038/sj.bjc.6602749
DO - 10.1038/sj.bjc.6602749
M3 - Journal article
C2 - 16136029
VL - 93
SP - 538
EP - 543
JO - The British journal of cancer. Supplement
JF - The British journal of cancer. Supplement
SN - 0007-0920
IS - 5
ER -
ID: 165882095