Emulsions of fat suitable for intravenous ad ministration have been used in this laboratory as @ source of calories, as an aid in the study of lipid metabolism, and as a vehicle for fat-soluble ma tenials. The latter use has been of value in studies with rats on the effects of the intravenous injection Cof carcinogenic hydrocarbons. Several investiga tions have been reported in which emulsions ...

brought to visible tumors. Mottram (10) observed tumor production in mouse skin after exposing it to a single treatment with a carcinogenic hydrocarbon, followed by re peated applications of croton oil. Later, Berenblum and Shubik (3) adapted this method to a quantitative approach to the study of chemical carcinogenesis. According to this method, the actual number of tumors produced were said t...

Lung cancer was induced in female Wistar rats by a single intratracheal instillation of 9, 10Dimethybenz(a)anthracene (DMBA). To evaluate the chemopreventive potential of Diclofenac, which is a preferential cyclooxygenase-2 (COX-2) inhibitor, animals were divided into four groups. Group 1 received normal saline intratracheally, Group 2 DMBA (20 mg/kg), Group 3 a daily oral dose of Diclofenac (8...

BACKGROUND Non-steroidal anti-inflammatory drugs (NSAIDs) act by inhibition of cyclooxygenase-2 (COX-2), which is overexpressed in cancer. The role of COX-2 and apoptosis were evaluated in 9,10-dimethylbenz(a)anthracene (DMBA)-induced lung cancer in rat and chemoprevention with indomethacin, a traditional NSAID and etoricoxib, a selective COX-2 inhibitor. METHODS The animals were divided into...

The induction of apoptosis by Piper betel leaf extracts during 7, 12 dimethylbenz [a] anthracene (DMBA) induced hamster buccal pouch (HBP) carcinoma was studied in male Syrian hamsters using DNA fragmentation and the apoptosis-associated proteins, tissue transglutaminase (tTG) and Bcl-2. Hamsters were divided into four groups of six animals each. Animals in group 1 were painted with a 0.5% solu...

The present study aimed to evaluate the efficacy of krypton laser photodynamic therapy (PDT) with PsD-007 for the treatment of oral mucosa dysplasia in 9,10-dimethyl-1,2-benzanthracene (DMBA)-treated hamsters. A DMBA-induced hamster cheek pouch model of precancerous lesions was created and the resultant 25 hamsters were divided into five groups. The right side was treated with PDT and the left ...

Introduction: DMBA is a chemical carcinogen that induces carcinomas within few weeks of its application. We developed an experimental model carcinogenesis induced by dissolved in 0,5% paraffin oil (DMBA-PO), verifying the inhibitory effect carcinogenicity phenyl isothiocyanate (PhITC), phenethyl (PhnITC) and benzyl (BITC). Material Methods: For this, 88 hamsters were distributed into three grou...

Polyaromatic hydrocarbons are ubiquitous environmental chemicals that are important mutagens and carcinogens. The purpose of this study was to determine whether genes within the major histocompatibility complex (MHC) influence their biological activities. Cell-mediated immunity to dimethylbenz(a)anthracene (DMBA) was investigated in congenic strains of mice. On three different backgrounds, H-2(...