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- W2513623712 abstract "Background We performed a randomized controlled chemoprevention trial of oral leukoplakia by administrating a low dose of beta‐carotene and vitamin C supplements. 17% of subjects in the experimental arm (4/23) demonstrated clinical remission (complete or partial response) at completion of the trial. The objective of this study was to determine whether baseline expression of p53 and ki67 demonstrated any differences between those responding or not responding to our intervention. A secondary objective was to elucidate any relationship between dietary factors and clinical responses. Methods For this biomarker study, we included all subjects in the experimental group ( n = 23) who were non‐smokers. Among 16 who completed the trial for 1 year of supplementation, there were four responders and 12 non‐responders at 1‐year follow‐up. Following immuno‐staining for p53 and ki67, the percentage of positive cell nuclei were analyzed as labeling index (LI). Results Expression of p53 was greater in basal layers than in para‐basal layers. Mean para‐basal LI of p53 was higher in non‐responding (26.0) than in responding subjects (11.2) ( P = 0.028). ki67 LIs were not significantly different in the two groups. Conclusions Expression of p53 was inversely related to clinical response to the supplements. Other biomarkers that may recognize subject's responsiveness to chemoprevention require further study." @default.
- W2513623712 created "2016-09-16" @default.
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- W2513623712 date "2016-09-08" @default.
- W2513623712 modified "2023-10-03" @default.
- W2513623712 title "p53 and ki67 as biomarkers in determining response to chemoprevention for oral leukoplakia" @default.
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- W2513623712 doi "https://doi.org/10.1111/jop.12498" @default.
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