The larval form of Tenebrio molitor (T. molitor) has been eaten in many countries and provides benefits as a new food source of protein for humans. However, no information exists regarding its safety for humans. The objective of the present study was to evaluate the genotoxicity and repeated dose oral toxicity of the freeze-dried powder of T. molitor larvae. The genotoxic potential was evaluate...

cystic fibrosis is an autosomal recessive disease caused by a wide spectrum of mutations in the gene encoding for the cystic fibrosis transmembrane conductance regulator protein. these mutations that correlate with different phenotypes, vary in their frequency and distribution in different populations. in this study missense mutation r117h that associated with the different clinical symptoms wa...

Several microbial systems have been shown to yield advantageous mutations in slowly growing or nongrowing cultures. In one assay system, the stationary-phase mutation mechanism differs from growth-dependent mutation, demonstrating that the two are different processes. This system assays reversion of a lac frameshift allele on an F' plasmid in Escherichia coli. The stationary-phase mutation mech...

The evolution and emergence of antibiotic resistance is a major public health concern. understanding the within-host microbial dynamics combining mutational processes, horizontal gene transfer resource consumption, one keys to solving this problem. We analyze generic model rigorously describe interactions four bacterial strains: fully sensitive drug, with only, plasmidic both resistances. By de...

some chemicals used by human such as food additives are mutagenic and mutagenicity effects analysis of them is very important because of considerable consumption by man. one of the most common methods used in the recognition of the chemicals' mutagenicity is salmonella typhimurium reverse mutation (ames) test. the purpose of the present study is mutagenicity effects analysis of sodium nitrite, ...

Retroviral populations exhibit a high evolutionary potential, giving rise to extensive genetic variation. Error-prone DNA synthesis catalyzed by reverse transcriptase (RT) generates variation in retroviral populations. Structural features within RTs are likely to contribute to the high rate of errors that occur during reverse transcription. We sought to determine whether amino acids within muri...

BACKGROUND Silica dioxide (SiO2) has been used in various industrial products, including paints and coatings, plastics, synthetic rubbers, and adhesives. Several studies have investigated the genotoxic effects of SiO2; however, the results remain controversial due to variations in the evaluation methods applied in determining its physicochemical properties. Thus, well characterized chemicals an...

The mouse is the leading organism for disease research. A rich resource of genetic variation occurs naturally in inbred and special strains owing to spontaneous mutations. However, one can also obtain desired gene mutations by using the following processes: targeted mutations that eliminate function in the whole organism or in a specific tissue; forward genetic screens using chemicals or transp...