A Study of the Effects of PEITC on Oral Cells With Mutant p53

Study Overview
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Brief Summary
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The aim of this clinical trial is to examine the effects of phenethyl isothiocyanate (PEITC), a compound derived from cruciferous vegetables, on oral cells with mutant p53. The p53 protein's normal (wild-type) function within cells is to act as a tumor suppressor, or anti-cancer protein. When mutated, the p53 protein not only no longer executes the functions of a tumor suppressor, and it can gain functions as a pro-cancer protein.22 The proposed clinical trial will utilize oral cells collected from subjects who are heavy smokers. Since the subjects are regularly exposed to mutagenic chemicals it is the thought that their oral cells will contain measurable levels of mutant p53. The participants will consume watercress juice, which is rich in PEITC (See Figure 1). Previous studies in the laboratory showed PEITC selectively depletes mutant p53, and not wild type p53, in cell culture. Our hypothesis is that the ITC in the watercress juice will lead to the depletion of mutant p53 within the oral cells. This depletion could lead to a possible clinical application of this compound, such as chemopreventives or oncologic treatments of individuals with oral cancers.

Conditions
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Oral Cancer

Intervention / Treatment
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* Dietary Supplement: Watercress Juice


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Heavy Smoker Between the ages of 20 and 65 Must be able to show proof of citizenship or residency of the United States Able to sign and understand a standard consent form Exclusion Criteria: Pregnant or Breast-feeding Having any of the following medical conditions: Leukoplakia Oral Lesions Cancer Any oral disease that causes sores, ulcerations, irritations, etc. Stomach or Intestinal Ulcers IBS (Irritable Bowel Syndrome) Kidney Disease Allergies to watercress or other Cruciferous Vegetables Strict Vegetarians or Vegans Religious Consumers of Watercress or other Cruciferous Vegetable Juices On any of the following medications: Chlorzoxazone (Parafon Forte, Paraflex) Lithium Water Pills/Diuretics (Thiazide or Lasix) Warfarin (Coumadin) Vitamin K supplements H2 acid blocker (Zantac, Pepcid, Axid, Tagamet) Proton Pump Inhibitor (Prevacid) Digoxin Antibiotics Diabetic Medications (Insulin) Inhaled Bronchodilator Oral Steroids (Prednisone, Medrol) Inhaled Steroids (Flonase) Raloxifene or Tamoxifen Thyroid Hormone Replacement

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Watercress Juice<br>The juice is prepared, by a trained member of the Chung laboratory staff, in the following manner; each serving of watercress juice will be prepared with 55gm watercress (from a local grocery store) with 220 ml purified water, for a proportion of 1:4 (w/w). The watercress and water will be placed in a 1.5 L mechanical blender and blended at low speed for approximately 15 seconds, followed by blending at a high speed for one additional minute. The resulting suspension will be filtered through two layers of cheese cloth. Remaining liquids will be manually extracted from the cheese cloth into the same container. Each serving will be measured to 200 ml. The remaining 20 ml will be used for analysis of ITC content. Each serving will be prepared and kept at 40 C until needed, no more than one hour prior to participant consumption by the subject. | Dietary Supplement: Watercress Juice<br>* The juice is prepared, by a trained member of the Chung laboratory staff, in the following manner; each serving of watercress juice will be prepared with 55gm watercress (from a local grocery store) with 220 ml purified water, for a proportion of 1:4 (w/w). The watercress and water will be placed in a 1.5 L mechanical blender and blended at low speed for approximately 15 seconds, followed by blending at a high speed for one additional minute. The resulting suspension will be filtered through two layers of cheese cloth. Remaining liquids will be manually extracted from the cheese cloth into the same container. Each serving will be measured to 200 ml. The remaining 20 ml will be used for analysis of ITC content. Each serving will be prepared and kept at 40 C until needed, no more than one hour prior to participant consumption by the subject.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evidence of reduced number of oral cells with mutant p53 after administration of PEITC derived from watercress, a cruciferous vegetable. |  | 8 hours | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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mutant p53, watercress, Phenethyl isothyocyanate, oral cells of smokers