alterations in the expression of micrornas (mirnas) have been proposed to play a role in the pathogenesis of acute lymphoblastic leukemia (all) and chronic lymphocytic leukemia (cll). dicer is one of the main regulators of mirna biogenesis, and deregulation of its expression has been indicated as a possible cause of mirna alterations observed in various cancers. our aim was to analyze the expre...

background: the multifunctional transforming growth factor beta (tgf-β) is a glycoprotein that exists in three isoforms. tgf-β3 expression increases in fetal wound healing and reduces fibronectin and collagen i and iii deposition, and also improves the architecture of the neodermis which is a combination of blood vessels and connective tissue during wound healing. fibroblasts are key cells in t...

To gain a deeper insight into the potential interactions between individual aromatic hydrocarbons in a mixture, several benzo[a]pyrene (B[a]P) and 7H-dibenzo[c,g]carbazole (DBC) binary mixtures were studied. The biological activity of the binary mixtures was investigated in the HepG2 and WB-F344 liver cell lines and the Chinese hamster V79 cell line that stably expresses the human cytochrome P4...

background: angiogenesis is an important process in various physiologic and pathologic states. the most significant stimulator of angiogenesis is vascular endothelial growth factor (vegf). in contrast, vasohibin1 acts as an angiogenesis inhibitor which specifically inhibits new vessels formation. the aim of the present study was cloning and expression of vasohibin1 gene in e. coli as well as pu...

CYP1A1 and CYP1A2 are transcriptionally activated in the human normal breast epithelial cell line MCF10A following exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). Shifting MCF10A cultures to medium deficient in serum and epidermal growth factor (EGF) caused rapid reductions in the activated (i.e., phosphorylated) forms of extracellular regulated kinases (ERKs) and the epidermal growth f...

objective: aflatoxin is important in the food industry, in animal husbandry and the medical area; there are enormous negative economic impacts due to this toxin. numerous studies have researched extracts and plant compounds with the intent to reduce the growth of aflatoxin-producing organisms, inhibit toxin production and suppress the major toxin encoded genes (i.e., aflr) in these organisms. l...

background & objective: streptococcosis is one of the bacterial infections in fish, especially rainbow trout which infects brain and nervous systems of fish and is caused by s. iniae . estimation of the impact of disease prevalence by s. iniae in fish farming in some countries is reported about 100 million dollars per year. some of the most effective proteins in pathogenicity of these bacteria ...

CYP1A1 and CYP1B1 metabolically activate many polycyclic aromatic hydrocarbons (PAHs), including benzo[a]pyrene, to reactive intermediates associated with toxicity, mutagenesis, and carcinogenesis. Paradoxically, however, Cyp1a1-/- knockout mice are more sensitive to oral benzo[a]pyrene exposure, compared with wild-type Cyp1a1+/+ mice (Mol Pharmacol 65:1225, 2004). To further investigate the me...

OBJECTIVE To estimate and compare the frequency of CYP1A1*2A gene polymorphisms in a Brazilian population and determine the possible contribution of these genetic variations to lung cancer risk. METHODS The study population included 200 patients with lung cancer, and the control group consisted of 264 blood donors. Genomic DNA was obtained from peripheral blood samples. The PCR-RFLP method wa...

INTRODUCTION Smoking increases the risk of developing rheumatoid arthritis (RA) and affects the severity of established RA. Smoking can impact on Th17 lymphocyte differentiation and function through activation of the aryl hydrocarbon receptor (AHR), a process with implications for the pathogenic mechanisms in RA that involve the cytokine, interleukin (IL)-17A. The objective of this study was to...