biphenyl/neoplasms

Polychlorinated biphenyls (PCBs) are widespread, chemically-stable environmental contaminants; some congeners are commonly found in human adipose tissue and breast milk. We investigated the effects of a single dose of one PCB mixture (Aroclor 1254) on tumors initiated by N-nitrosodimethylamine

Fish from the Great Lakes contain polychlorinated biphenyls (PCBs) which have been shown to disrupt endocrine function and mimic thyroid hormones, but they also contain beneficial omega-3 fatty acids that may offer protection against endocrine cancers. The purpose of this study was to examine the

Polychlorinated biphenyls (PCBs) are ubiquitious lipophilic environmental pollutants. Some of the PCB congeners and mixtures of congeners have tumor promoting activity in rat liver. The mechanism of their activity is not fully understood and is likely to be multifactorial. The aim of this study was

The effects of a tumor promoting polychlorinated biphenyl mixture, Aroclor 1254, on I-compounds (tissue, species and sex dependent DNA modifications that increase with age in untreated rodents) were studied by 32P-postlabeling in male Sprague-Dawley rat liver, kidney, and lung DNA. Aroclor 1254 was

Firemaster FF-1, a polybrominated biphenyl (PBB) mixture, was dissolved in corn oil and given as a dose of 200 mg/kg body weight to Sherman rats on d 7 and 14 of pregnancy. Control rats received equivalent doses of corn oil alone. Selected pups and all dams were killed 1 mo after pups were weaned. A

Noninbred Sherman strain rats were given the polybrominated biphenyl mixture Firemaster FF-1 (PBB). Rats given a single dose of 1,000 mg PBB/kg or 12 doses of 100 mg PBB/kg body weight in corn oil by gavage had final (when less than or equal to 26 mo old) liver PBB concentrations of 17.1 and 34.8

We have previously shown a positive tumor-promoting effect of a single dose of Aroclor 1254 on lung and liver tumors initiated neonatally in the mouse by N-nitrosodimethylamine (NDMA). In this study, we have confirmed and extended this observation with NDMA and the tobacco-specific nitrosamine,

Excess matrix degradation is one of the hallmarks of cancer and is an important factor in the process of tumor progression. It is implicated in invasion, metastasis, growth, angiogenesis and migration. Many characteristics of matrix metalloproteinases (MMPs) make them attractive therapeutic and

The etiology of human breast cancer is unknown; accepted risk factors, e.g., menstrual, reproductive, and family histories, are implicated in less than half of all cases. Various halogenated hydrocarbons--acting as either co-carcinogens or promoting agents--which are derived from the environment and

Polychlorinated biphenyls (PCBs) are toxic and persistent chemicals produced between 1930s and 1980s primarily for insulating fluids in heavy-duty electrical equipment in power plants, industries, and large buildings. They persist in the environment and accumulate in plants and animals, and have

A series of (2E,2'E)-1,1'-(3-hydroxy-5-methylbiphenyl-2,6-diyl)-bis(3-pheylprop-2-ene-1-ones (5-33) were prepared by the reaction of 1,3-diacetyl biphenyls (1-4) with different aldehydes in presence of catalytic amount of solid KOH in ethanol in excellent yields. The compounds were evaluated for

BACKGROUND Dimethyl dicarboxylate biphenyl (DDB) is a clinically used hepatoprotectant and has also been found to have chemopreventive activity. METHODS Sixteen novel analogs (5-20) were designed, synthesized, and evaluated for their cancer preventive activity. The 2,2'-bismethyl ester (5-18) and

BACKGROUND 1,1-Bis (3'-indolyl)-1-(p-biphenyl) methane (CDIM9) has been identified as a new peroxisome proliferator-activated receptor (PPAR)-gamma agonist that exhibits both receptor dependent and independent antitumor activities. CDIM9 has not previously been studied with respect to its effects

The cis-stilbene, combretastatin A4 (CA4), is a potent microtubule targeting and vascular damaging agent. Despite promising results at the pre-clinical level and extensive clinical evaluation, CA4 has yet to be approved for therapeutic use. One impediment to the development of CA4 is an inherent

BACKGROUND Polychlorinated biphenyls (PCBs) are a family of structurally related chlorinated aromatic hydrocarbons. Numerous studies have documented a wide spectrum of biological effects of PCBs on human health, such as immunotoxicity, neurotoxicity, estrogenic or antiestrogenic activity, and