PURPOSE The development of second primary tumors (SPT) or recurrence alters prognosis for curatively treated head and neck squamous cell carcinoma (HNSCC) patients. The 13-cis-Retinoic acid (13-cRA) has been tested as a chemoprevention agent in clinical trials with mixed results. Therefore, we investigated whether genetic variants in the PI3K/PTEN/AKT/mTOR pathway could serve as biomarkers to i...

Breast cancer is the most commonly diagnosed cancer among women in the United States, and current routine screening prevention methods are costly and expose patients to unnecessary risks of overtreatment. The utilization of a risk-based stratification model, genetic testing, and chemoprevention could decrease the incidence of invasive breast cancer but uptake has been low among high-risk women....

In 1976, Sporn has defined chemoprevention as "the use of pharmacologic or natural agents that inhibit the development of invasive breast cancer either by blocking the DNA damage that initiates carcinogenesis, or by arresting or reversing the progression of premalignant cells in which such damage has already occurred." Although the precise mechanism or mechanisms that promote a breast cancer ar...

Chemoprevention is a clinical strategy to block or reverse carcinogenesis before the development of invasive cancer. Studies of chemoprevention in the lungs and upper aerodigestive tract have relied on the field carcinogenesis hypothesis, which predicts that diffuse epithelial injury will result from exposure of that epithelium to carcinogens. This hypothesis is supported by the frequent occurr...

Chemoprevention of gastrointestinal tumors uses natural or synthetic agents to arrest, retard or reverse the carcinogenesis process. The prospect of prevention is clearly appealing, especially for colorectal cancer (CRC), that represents the second most common cause of cancer-related death in the Western world. Aspirin is the best studied chemopreventive agent for CRC, with randomized trials de...

Chemoprevention is the use of small molecules, including dietary or herbal chemicals, to prevent diseases, as opposed to chemotherapeutics, where chemicals, mostly synthetic, are used to remove or alleviate the symptom of diseases. The concept of chemoprevention, although prevalent in the East for thousands of years, has not gained scientific recognition in the West until recently. Large-scale ...

Cancer prevention and control involves a diverse spectrum of activities that range from preventing the disease to providing rehabilitation to its survivors. The range of activities included within the definition of cancer prevention and control makes it difficult to determine factors that would predict accrual to specific cancer prevention and control trials. The participation of 36 CCOP organi...

Despite positive results in large scale chemoprevention trials, many physicians are unaware of the potential cancer preventive properties of drugs in common usage. The antioestrogen tamoxifen and the selective cyclo-oxygenase-2 inhibitor celecoxib have been licensed in the USA for the chemoprevention of breast and colorectal cancers respectively in selected high risk individuals. Similarly, fol...

GOALS Expression of GLUT-1 and transglutaminase 2 is increased in aggressive breast cancer, whereas claudin-1, which is expressed in normal tissues, is absent in such tumors. This experimental study was undertaken to establish the aggressiveness and prognosis of DMBA-induced mammary tumors in female Wistar rats based on the assessment of these markers. MATERIALS AND METHODS The rats were divi...

While chemoprevention with botanicals shows promise in reducing cancer risk, recruitment and retention of participants for trials continues to be costly and presents unique challenges. Knowledge of interest, willingness of target populations and evaluation of design challenges are critical to improve accrual in these chemoprevention trials. OBJECTIVE The study assessed interest and willingnes...